:root {
    --ieee-blue: #00629B;
    --ieee-dark: #003057;
    --ieee-light: #0085CA;
    --ieee-accent: #E6E9F0;
    --ieee-gold: #0085CA;
    --white: #FFFFFF;
    --off-white: #F4F6FB;
    --text: #0A1628;
    --text-muted: #5A6A85;
    --grid-color: rgba(0, 98, 155, 0.07);
  }

  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  :root:not([data-palette]),
  :root[data-palette='enhanced'] {
    --ieee-blue: #245fb8;
    --ieee-dark: #112f55;
    --ieee-light: #38a2db;
    --ieee-accent: #e7eef8;
    --ieee-gold: #d39a31;
    --ieee-indigo: #5d67d6;
    --ieee-teal: #187e8f;
    --ieee-mint: #2e9b74;
    --white: #ffffff;
    --off-white: #ecf2f8;
    --text: #122235;
    --text-muted: #607086;
    --grid-color: rgba(36, 95, 184, 0.08);
    --page-backdrop: #ecf2f8;
    --intro-backdrop:
      radial-gradient(circle at center, rgba(36, 95, 184, 0.16) 0%, rgba(93, 103, 214, 0.06) 22%, transparent 54%),
      linear-gradient(180deg, rgba(248, 250, 252, 0.98) 0%, rgba(236, 242, 248, 0.99) 100%);
    --intro-grid-color: rgba(36, 95, 184, 0.06);
    --intro-halo: radial-gradient(circle, rgba(56, 162, 219, 0.18) 0%, rgba(93, 103, 214, 0.08) 34%, transparent 72%);
    --nav-bg: rgba(14, 31, 54, 0.96);
    --nav-border: rgba(56, 162, 219, 0.18);
    --nav-ink-muted: rgba(239, 246, 255, 0.74);
    --nav-pill-border: rgba(255, 255, 255, 0.18);
    --nav-pill-bg: rgba(255, 255, 255, 0.08);
    --nav-pill-hover-border: rgba(255, 255, 255, 0.32);
    --nav-pill-hover-bg: rgba(255, 255, 255, 0.15);
    --nav-results-bg: rgba(9, 20, 36, 0.98);
    --nav-results-border: rgba(95, 133, 185, 0.24);
    --nav-results-item-bg: rgba(255, 255, 255, 0.05);
    --nav-results-item-hover-border: rgba(145, 204, 255, 0.28);
    --nav-results-item-hover-bg: rgba(36, 95, 184, 0.16);
    --nav-results-item-active-bg: rgba(93, 103, 214, 0.24);
    --nav-results-eyebrow: rgba(145, 204, 255, 0.84);
    --nav-results-meta: rgba(221, 233, 248, 0.76);
    --nav-search-highlight: rgba(56, 162, 219, 0.38);
    --sidebar-panel-bg: rgba(255, 255, 255, 0.92);
    --sidebar-panel-border: rgba(24, 84, 151, 0.14);
    --sidebar-panel-shadow: 0 24px 48px rgba(14, 31, 54, 0.12);
    --sidebar-toggle-bg: rgba(238, 243, 249, 0.94);
    --sidebar-toggle-border: rgba(36, 95, 184, 0.14);
    --sidebar-toggle-hover-bg: rgba(226, 233, 244, 0.98);
    --sidebar-item-bg: rgba(255, 255, 255, 0.96);
    --sidebar-item-border: rgba(36, 95, 184, 0.12);
    --sidebar-item-hover-bg: rgba(242, 247, 252, 0.98);
    --sidebar-item-hover-border: rgba(24, 126, 143, 0.24);
    --sidebar-icon-bg: rgba(24, 126, 143, 0.1);
    --sidebar-icon-border: rgba(24, 126, 143, 0.12);
    --sidebar-label: rgba(24, 126, 143, 0.78);
    --hero-glow: radial-gradient(ellipse, rgba(56, 162, 219, 0.16) 0%, rgba(93, 103, 214, 0.08) 28%, transparent 70%);
    --hero-card-surface: rgba(255, 255, 255, 0.97);
    --hero-card-border: rgba(24, 84, 151, 0.12);
    --hero-card-hover-border: rgba(24, 126, 143, 0.22);
    --hero-card-shadow: 0 20px 44px rgba(14, 31, 54, 0.12);
    --hero-card-hover-shadow: 0 26px 52px rgba(14, 31, 54, 0.16);
    --button-primary-shadow: 0 8px 20px rgba(36, 95, 184, 0.24);
    --button-secondary-bg: rgba(255, 255, 255, 0.92);
    --button-secondary-border: rgba(36, 95, 184, 0.16);
    --button-secondary-hover-bg: rgba(24, 126, 143, 0.08);
    --button-secondary-hover-border: rgba(24, 126, 143, 0.22);
    --features-bg: #112f55;
    --features-card-bg: rgba(255, 255, 255, 0.045);
    --features-card-hover-bg: rgba(255, 255, 255, 0.09);
    --features-card-border: rgba(255, 255, 255, 0.07);
    --features-muted: rgba(236, 243, 250, 0.68);
    --visitor-route-bg: rgba(255, 255, 255, 0.055);
    --visitor-route-border: rgba(255, 255, 255, 0.12);
    --visitor-step-bg: rgba(255, 255, 255, 0.045);
    --visitor-step-border: rgba(255, 255, 255, 0.09);
    --visitor-step-hover-bg: rgba(56, 162, 219, 0.11);
    --visitor-step-hover-border: rgba(145, 204, 255, 0.24);
  }

  :root[data-palette='legacy'] {
    --page-backdrop: #F4F6FB;
    --intro-backdrop:
      radial-gradient(circle at center, rgba(0, 133, 202, 0.18) 0%, rgba(0, 133, 202, 0.08) 18%, transparent 52%),
      linear-gradient(180deg, rgba(244, 246, 251, 0.98) 0%, rgba(236, 243, 250, 0.99) 100%);
    --intro-grid-color: rgba(0, 98, 155, 0.06);
    --intro-halo: radial-gradient(circle, rgba(0, 133, 202, 0.2) 0%, rgba(0, 98, 155, 0.08) 34%, transparent 72%);
    --nav-bg: rgba(0, 48, 87, 0.96);
    --nav-border: rgba(0, 133, 202, 0.2);
    --nav-ink-muted: rgba(255, 255, 255, 0.72);
    --nav-pill-border: rgba(255, 255, 255, 0.18);
    --nav-pill-bg: rgba(255, 255, 255, 0.08);
    --nav-pill-hover-border: rgba(255, 255, 255, 0.32);
    --nav-pill-hover-bg: rgba(255, 255, 255, 0.14);
    --nav-results-bg: rgba(7, 17, 28, 0.98);
    --nav-results-border: rgba(255, 255, 255, 0.12);
    --nav-results-item-bg: rgba(255, 255, 255, 0.05);
    --nav-results-item-hover-border: rgba(143, 212, 255, 0.22);
    --nav-results-item-hover-bg: rgba(255, 255, 255, 0.1);
    --nav-results-item-active-bg: rgba(255, 255, 255, 0.12);
    --nav-results-eyebrow: rgba(143, 212, 255, 0.82);
    --nav-results-meta: rgba(226, 238, 252, 0.72);
    --nav-search-highlight: rgba(0, 133, 202, 0.36);
    --sidebar-panel-bg: rgba(255, 255, 255, 0.9);
    --sidebar-panel-border: rgba(0, 98, 155, 0.12);
    --sidebar-panel-shadow: 0 24px 48px rgba(0, 48, 87, 0.12);
    --sidebar-toggle-bg: rgba(244, 246, 251, 0.9);
    --sidebar-toggle-border: rgba(0, 98, 155, 0.12);
    --sidebar-toggle-hover-bg: rgba(230, 238, 247, 0.96);
    --sidebar-item-bg: rgba(255, 255, 255, 0.96);
    --sidebar-item-border: rgba(0, 98, 155, 0.12);
    --sidebar-item-hover-bg: rgba(255, 255, 255, 0.56);
    --sidebar-item-hover-border: rgba(0, 98, 155, 0.12);
    --sidebar-icon-bg: rgba(0, 133, 202, 0.1);
    --sidebar-icon-border: rgba(0, 98, 155, 0.08);
    --sidebar-label: rgba(0, 98, 155, 0.75);
    --hero-glow: radial-gradient(ellipse, rgba(0, 133, 202, 0.22) 0%, transparent 70%);
    --hero-card-surface: rgba(255, 255, 255, 0.96);
    --hero-card-border: rgba(0, 98, 155, 0.1);
    --hero-card-hover-border: rgba(0, 98, 155, 0.18);
    --hero-card-shadow: 0 20px 44px rgba(0, 48, 87, 0.11);
    --hero-card-hover-shadow: 0 26px 52px rgba(0, 48, 87, 0.15);
    --button-primary-shadow: 0 8px 20px rgba(0, 98, 155, 0.24);
    --button-secondary-bg: rgba(255, 255, 255, 0.92);
    --button-secondary-border: rgba(0, 98, 155, 0.3);
    --button-secondary-hover-bg: rgba(0, 98, 155, 0.06);
    --button-secondary-hover-border: var(--ieee-blue);
    --features-bg: #003057;
    --features-card-bg: rgba(255, 255, 255, 0.04);
    --features-card-hover-bg: rgba(255, 255, 255, 0.08);
    --features-card-border: rgba(255, 255, 255, 0.06);
    --features-muted: rgba(255, 255, 255, 0.5);
    --visitor-route-bg: rgba(255, 255, 255, 0.05);
    --visitor-route-border: rgba(255, 255, 255, 0.12);
    --visitor-step-bg: rgba(255, 255, 255, 0.04);
    --visitor-step-border: rgba(255, 255, 255, 0.08);
    --visitor-step-hover-bg: rgba(255, 255, 255, 0.08);
    --visitor-step-hover-border: rgba(255, 255, 255, 0.22);
  }

  html {
    scroll-behavior: smooth;
    scroll-padding-top: 112px;
  }

  body.page-home {
    font-family: 'Open Sans', sans-serif;
    background: var(--page-backdrop);
    color: var(--text);
    overflow-x: hidden;
    --home-sidebar-width: 344px;
    --home-sidebar-collapsed-width: 84px;
  }

  body.page-home > :not(.home-intro) {
    transition: opacity 0.6s ease, filter 0.6s ease;
  }

  html.has-home-intro body.page-home {
    overflow: hidden;
  }

  html.has-home-intro body.page-home > :not(.home-intro) {
    opacity: 0;
    filter: blur(10px);
    pointer-events: none;
  }

  html.has-home-intro.home-intro-leaving body.page-home > :not(.home-intro) {
    opacity: 1;
    filter: blur(0);
    pointer-events: auto;
    transition-delay: 0.08s;
  }

  .home-intro {
    position: fixed;
    inset: 0;
    z-index: 260;
    display: grid;
    place-items: center;
    background: var(--intro-backdrop);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.58s ease, visibility 0.58s ease;
  }

  html.has-home-intro .home-intro {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  html.has-home-intro.home-intro-leaving .home-intro {
    opacity: 0;
    visibility: hidden;
  }

  .home-intro::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(var(--intro-grid-color) 1px, transparent 1px),
      linear-gradient(90deg, var(--intro-grid-color) 1px, transparent 1px);
    background-size: 56px 56px;
    opacity: 0.85;
  }

  .home-intro__halo {
    position: absolute;
    width: min(48vw, 440px);
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--intro-halo);
    animation: introHaloPulse 1.8s ease-in-out infinite;
  }

  .home-intro__inner {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }

  .home-intro__mark-wrap {
    width: min(19vw, 136px);
    min-width: 92px;
    position: relative;
    opacity: 0;
    transform: translateY(18px) scale(0.8);
    filter: drop-shadow(0 18px 40px rgba(0, 48, 87, 0.14));
  }

  .home-intro__mark {
    width: 100%;
    height: auto;
    display: block;
  }

  .home-intro__mark--dark {
    display: none;
  }

  html.has-home-intro .home-intro__mark-wrap {
    animation: introMarkIn 1s cubic-bezier(0.22, 1, 0.36, 1) 0.08s forwards, introMarkFloat 2.6s ease-in-out 1.05s infinite;
  }

  html.has-home-intro.home-intro-leaving .home-intro__mark-wrap {
    animation: introMarkOut 0.52s ease forwards;
  }

  .home-intro__label {
    font-family: Calibri, 'Open Sans', sans-serif;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.45em;
    text-transform: uppercase;
    color: rgba(0, 48, 87, 0.56);
    opacity: 0;
    transform: translateY(10px);
  }

  html.has-home-intro .home-intro__label {
    animation: introLabelIn 0.72s ease 0.42s forwards;
  }

  html.has-home-intro.home-intro-leaving .home-intro__label {
    animation: introLabelOut 0.35s ease forwards;
  }

  /* ─── GRID BACKGROUND ─── */
  body.page-home::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
      linear-gradient(var(--grid-color) 1px, transparent 1px),
      linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
    z-index: 0;
  }

  /* ─── NAV ─── */
  nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    display: grid;
    grid-template-columns: minmax(max-content, 1fr) minmax(400px, 720px) minmax(max-content, 1fr);
    align-items: center;
    column-gap: 24px;
    padding: 0 56px;
    height: 80px;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--nav-border);
  }

  .nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    justify-self: start;
  }

  .nav-logo-badge {
    position: relative;
    width: 40px;
    height: 50px;
    flex-shrink: 0;
  }

  .nav-logo-mark {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    filter: drop-shadow(0 10px 18px rgba(0, 17, 34, 0.22));
  }

  .nav-logo-lockup {
    display: flex;
    flex-direction: column;
    gap: 3px;
  }

  .nav-logo-text {
    font-family: 'Open Sans', sans-serif;
    font-weight: 800;
    font-size: 23px;
    color: var(--white);
    letter-spacing: -0.5px;
    line-height: 1;
    text-transform: uppercase;
  }

  .nav-logo-meta {
    font-family: Calibri, 'Open Sans', sans-serif;
    font-size: 10px;
    font-style: italic;
    letter-spacing: 0.4px;
    color: rgba(255, 255, 255, 0.68);
  }

  .nav-search-shell {
    position: relative;
    width: 100%;
    max-width: 720px;
    justify-self: center;
  }

  .nav-search {
    position: relative;
    width: 100%;
  }

  .nav-search__field {
    position: relative;
    width: 100%;
  }

  .nav-search__icon {
    position: absolute;
    top: 50%;
    left: 18px;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.72);
    border-radius: 50%;
    transform: translateY(-58%);
    pointer-events: none;
  }

  .nav-search__icon::after {
    content: '';
    position: absolute;
    right: -5px;
    bottom: -2px;
    width: 8px;
    height: 2px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
    transform: rotate(45deg);
    transform-origin: center;
  }

  .nav-search__input {
    width: 100%;
    min-height: 52px;
    padding: 0 96px 0 52px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-family: 'Open Sans', sans-serif;
    font-size: 15px;
    outline: none;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  }

  .nav-search__input::placeholder {
    color: rgba(255, 255, 255, 0.62);
  }

  .nav-search__input:focus {
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.14);
  }

  .nav-search__clear {
    position: absolute;
    top: 50%;
    right: 12px;
    min-height: 38px;
    padding: 0 14px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.92);
    font-family: 'Open Sans', sans-serif;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transform: translateY(-50%);
    transition: border-color 0.18s ease, background 0.18s ease, transform 0.18s ease;
  }

  .nav-search__clear:hover {
    border-color: rgba(255, 255, 255, 0.28);
    background: rgba(255, 255, 255, 0.16);
    transform: translateY(-50%) translateY(-1px);
  }

  .nav-search-results {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    display: grid;
    gap: 8px;
    padding: 12px;
    border-radius: 20px;
    border: 1px solid var(--nav-results-border);
    background: var(--nav-results-bg);
    box-shadow: 0 22px 42px rgba(0, 0, 0, 0.28);
    backdrop-filter: blur(18px);
    max-height: min(56vh, 440px);
    overflow-y: auto;
  }

  .nav-search-results[hidden] {
    display: none;
  }

  .nav-search-result,
  .nav-search-results__empty {
    width: 100%;
    padding: 12px 14px;
    border-radius: 16px;
    border: 1px solid transparent;
    background: var(--nav-results-item-bg);
    text-align: left;
  }

  .nav-search-result {
    display: grid;
    gap: 4px;
    color: inherit;
    font: inherit;
    cursor: pointer;
    transition: border-color 0.18s ease, background 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
  }

  .nav-search-result:hover {
    border-color: var(--nav-results-item-hover-border);
    background: var(--nav-results-item-hover-bg);
    transform: translateY(-1px);
  }

  .nav-search-result.is-active {
    border-color: var(--nav-results-item-hover-border);
    background: var(--nav-results-item-active-bg);
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.18);
  }

  .nav-search-result__eyebrow {
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--nav-results-eyebrow);
  }

  .nav-search-result__title {
    font-size: 14px;
    font-weight: 700;
    line-height: 1.35;
    color: var(--white);
  }

  .nav-search-result__meta,
  .nav-search-results__empty {
    font-size: 12px;
    line-height: 1.5;
    color: var(--nav-results-meta);
  }

  .nav-search-result__snippet {
    font-size: 12px;
    line-height: 1.5;
    color: var(--nav-results-meta);
  }

  .nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
    justify-self: end;
    margin: 0;
  }

  .nav-links a {
    font-family: 'Open Sans', sans-serif;
    font-size: 13px;
    font-weight: 500;
    color: var(--nav-ink-muted);
    text-decoration: none;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: color .2s;
  }

  .nav-links button {
    font-family: 'Open Sans', sans-serif;
    font-size: 13px;
    font-weight: 500;
    color: var(--nav-ink-muted);
    text-decoration: none;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: color .2s;
    background: transparent;
    border: none;
    padding: 0;
    cursor: pointer;
  }

  .nav-sidebar-trigger {
    display: none;
  }

  .nav-links a:hover { color: var(--ieee-gold); }
  .nav-links button:hover { color: var(--ieee-gold); }

  .nav-theme-item {
    display: flex;
    align-items: center;
  }

  .nav-links .theme-toggle {
    position: static;
    right: auto;
    bottom: auto;
    z-index: auto;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 38px;
    padding: 0 12px 0 10px;
    border: 1px solid var(--nav-pill-border);
    border-radius: 999px;
    background: var(--nav-pill-bg);
    color: rgba(255, 255, 255, 0.84);
    font-family: 'Open Sans', sans-serif;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    backdrop-filter: blur(12px);
    box-shadow: none;
    transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease, transform 0.18s ease;
  }

  .nav-links .theme-toggle:hover {
    color: var(--white);
    border-color: var(--nav-pill-hover-border);
    background: var(--nav-pill-hover-bg);
    transform: translateY(-1px);
  }

  .nav-links .theme-toggle:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.8);
    outline-offset: 3px;
  }

  .nav-links .theme-toggle__icon {
    width: 18px;
    height: 18px;
    border-radius: 999px;
    background: linear-gradient(135deg, #ffd56b 0%, #f4a617 100%);
    box-shadow: inset -3px -3px 0 rgba(255, 255, 255, 0.35);
    flex-shrink: 0;
  }

  .nav-links .theme-toggle[data-theme-current='dark'] .theme-toggle__icon {
    background: linear-gradient(135deg, #c1dbff 0%, #6aaeff 100%);
    box-shadow: inset -4px -4px 0 rgba(4, 10, 18, 0.28);
  }

  .nav-cta {
    background: var(--white);
    color: var(--ieee-dark) !important;
    padding: 8px 20px;
    border-radius: 6px;
    font-weight: 600 !important;
    transition: background .2s, transform .1s !important;
  }

  .nav-cta:hover { background: var(--ieee-blue) !important; transform: translateY(-1px); }

  .home-search-target-active {
    scroll-margin-top: 120px;
    outline: 2px solid var(--nav-search-highlight);
    outline-offset: 8px;
    border-radius: 20px;
  }

  /* ─── SIDEBAR LAYOUT ─── */
  .home-shell {
    position: relative;
    z-index: 1;
    display: block;
  }

  .home-main {
    min-width: 0;
    padding-left: 0;
  }

  .home-sidebar {
    position: fixed;
    top: 84px;
    left: 24px;
    width: var(--home-sidebar-width);
    padding: 0;
    z-index: 90;
    transition: transform 0.24s ease, opacity 0.18s ease;
  }

  .home-sidebar__panel {
    max-height: calc(100vh - 108px);
    display: flex;
    flex-direction: column;
    gap: 18px;
    padding: 20px 18px 18px;
    border-radius: 24px;
    border: 1px solid var(--sidebar-panel-border);
    background: var(--sidebar-panel-bg);
    box-shadow: var(--sidebar-panel-shadow);
    backdrop-filter: blur(18px);
    overflow-y: auto;
  }

  .home-sidebar__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
  }

  .home-sidebar__header-copy {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
  }

  .home-sidebar__eyebrow {
    font-family: 'Open Sans', sans-serif;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--sidebar-label);
  }

  .home-sidebar__title {
    font-family: 'Open Sans', sans-serif;
    font-size: 24px;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--ieee-dark);
  }

  .home-sidebar__toggle {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    border: 1px solid var(--sidebar-toggle-border);
    background: var(--sidebar-toggle-bg);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    gap: 0;
    flex-shrink: 0;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  }

  .home-sidebar__toggle:hover {
    border-color: var(--sidebar-item-hover-border);
    background: var(--sidebar-toggle-hover-bg);
  }

  .home-sidebar__toggle-bar {
      position: absolute;
      width: 14px;
      height: 2px;
      border-radius: 999px;
      background: var(--ieee-dark);
      transition: transform 0.2s ease, opacity 0.2s ease;
    }
  
  .home-sidebar__toggle-bar:last-child {
      transform: rotate(90deg) scaleX(1);
    }

  .home-sidebar__toggle[aria-expanded='true'] .home-sidebar__toggle-bar:last-child {
      opacity: 0;
      transform: rotate(90deg) scaleX(0);
    }

  .home-sidebar__desc {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-muted);
  }

  .home-sidebar__spotlight {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr) auto;
    gap: 12px;
    align-items: center;
    padding: 14px;
    border-radius: 20px;
    border: 1px solid var(--sidebar-item-border);
    background: var(--sidebar-item-bg);
    text-decoration: none;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .home-sidebar__spotlight:hover {
    transform: translateY(-2px);
    border-color: var(--sidebar-item-hover-border);
    box-shadow: 0 16px 32px rgba(0, 48, 87, 0.12);
  }

  .home-sidebar__spotlight-icon,
  .home-sidebar__icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--sidebar-icon-bg);
    border: 1px solid var(--sidebar-icon-border);
    flex-shrink: 0;
  }

  .home-sidebar__spotlight-copy,
  .home-sidebar__link-copy {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
  }

  .home-sidebar__spotlight-kicker,
  .home-sidebar__group-label {
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--sidebar-label);
  }

  .home-sidebar__spotlight-title,
  .home-sidebar__link-title {
    font-size: 14px;
    font-weight: 700;
    line-height: 1.35;
    color: var(--ieee-dark);
  }

  .home-sidebar__spotlight-desc,
  .home-sidebar__link-meta {
    font-size: 12px;
    line-height: 1.5;
    color: var(--text-muted);
  }

  .home-sidebar__spotlight-cta {
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ieee-blue);
  }

  .home-sidebar__group {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .home-sidebar__links {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .home-sidebar__link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 18px;
    text-decoration: none;
    transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
    border: 1px solid transparent;
  }

  .home-sidebar__link:hover {
    background: var(--sidebar-item-hover-bg);
    border-color: var(--sidebar-item-hover-border);
    transform: translateX(2px);
  }

  .home-sidebar__mobile-trigger,
  .home-sidebar__backdrop {
    display: none;
  }

  body.page-home.sidebar-hidden .home-sidebar {
    transform: translateX(calc(-100% - 32px));
    opacity: 0;
    pointer-events: none;
  }

  .home-sidebar-tooltip {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 160;
    max-width: 220px;
    padding: 10px 12px;
    border-radius: 16px;
    border: 1px solid rgba(0, 98, 155, 0.14);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 18px 36px rgba(0, 48, 87, 0.14);
    backdrop-filter: blur(16px);
    pointer-events: none;
    opacity: 0;
    transform: translateY(-50%) translateX(-8px);
    transition: opacity 0.14s ease, transform 0.14s ease;
  }

  .home-sidebar-tooltip[hidden] {
    display: none;
  }

  .home-sidebar-tooltip.is-visible {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
  }

  .home-sidebar-tooltip__title {
    font-size: 13px;
    font-weight: 700;
    line-height: 1.35;
    color: var(--ieee-dark);
  }

  .home-sidebar-tooltip__meta {
    margin-top: 4px;
    font-size: 11px;
    line-height: 1.45;
    color: var(--text-muted);
  }

  button.btn-secondary {
    cursor: pointer;
  }

  .btn-secondary--sidebar {
    appearance: none;
  }

  /* ─── HERO ─── */
  .hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 100px 48px 80px;
    overflow: hidden;
    z-index: 1;
  }

  .hero-glow {
    position: absolute;
    width: 900px; height: 600px;
    background: var(--hero-glow);
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 0;
  }

  .hero-content {
    position: relative;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: min(100%, 708px);
    margin: 0 auto;
  }

  .hero-network {
    position: absolute;
    width: 280px;
    height: 180px;
    pointer-events: none;
    opacity: 0.82;
    z-index: 0;
  }

  .hero-network-left {
    left: 64px;
    top: 140px;
    animation: networkFloat 8s ease-in-out infinite;
  }

  .hero-network-right {
    right: 54px;
    bottom: 112px;
    animation: networkFloat 9s ease-in-out infinite reverse;
  }

  .hero-network-svg {
    width: 100%;
    height: 100%;
  }

  .hero-network-path {
    fill: none;
    stroke: rgba(0, 98, 155, 0.28);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 12 14;
    animation: networkFlow 12s linear infinite;
  }

  .hero-network-path--alt {
    stroke: rgba(0, 133, 202, 0.22);
    animation-duration: 16s;
  }

  .hero-network-node {
    fill: var(--white);
    stroke: var(--ieee-light);
    stroke-width: 3;
    transform-box: fill-box;
    transform-origin: center;
    animation: nodePulse 2.6s ease-in-out infinite;
  }

  .hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0,98,155,0.12);
    border: 1px solid rgba(0,133,202,0.3);
    padding: 6px 16px;
    border-radius: 100px;
    font-family: Calibri, 'Open Sans', sans-serif;
    font-size: 11px;
    color: var(--ieee-light);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 32px;
    animation: fadeDown .6s ease both;
  }

  .hero-tag::before {
    content: '';
    width: 6px; height: 6px;
    background: var(--ieee-gold);
    border-radius: 50%;
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.4); }
  }

  @keyframes introHaloPulse {
    0%, 100% { transform: scale(0.92); opacity: 0.65; }
    50% { transform: scale(1.06); opacity: 1; }
  }

  @keyframes introMarkIn {
    0% {
      opacity: 0;
      transform: translateY(18px) scale(0.8);
      filter: drop-shadow(0 18px 40px rgba(0, 48, 87, 0.08));
    }
    100% {
      opacity: 1;
      transform: translateY(0) scale(1);
      filter: drop-shadow(0 22px 46px rgba(0, 48, 87, 0.2));
    }
  }

  @keyframes introMarkFloat {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-6px) scale(1.02); }
  }

  @keyframes introMarkOut {
    0% {
      opacity: 1;
      transform: translateY(0) scale(1);
    }
    100% {
      opacity: 0;
      transform: translateY(-16px) scale(0.92);
    }
  }

  @keyframes introLabelIn {
    0% {
      opacity: 0;
      transform: translateY(10px);
      letter-spacing: 0.6em;
    }
    100% {
      opacity: 1;
      transform: translateY(0);
      letter-spacing: 0.45em;
    }
  }

  @keyframes introLabelOut {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(-8px); }
  }

  @keyframes networkFlow {
    from { stroke-dashoffset: 0; }
    to { stroke-dashoffset: -240; }
  }

  @keyframes networkFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
  }

  @keyframes nodePulse {
    0%, 100% { opacity: 0.9; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.14); }
  }

  .hero-title {
    font-family: 'Open Sans', sans-serif;
    font-weight: 800;
    font-size: clamp(68px, 10.5vw, 120px);
    line-height: 0.92;
    letter-spacing: -4.8px;
    color: var(--ieee-dark);
    text-align: center;
    animation: fadeUp .7s .1s ease both;
    position: relative;
    z-index: 1;
  }

  .hero-title .accent { color: var(--ieee-blue); }
  .hero-title .highlight {
    color: var(--ieee-light);
    -webkit-text-stroke: 0;
    background: linear-gradient(135deg, #0085CA, #00629B);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .hero-sub {
    font-size: 21px;
    font-weight: 300;
    color: var(--text-muted);
    max-width: 680px;
    text-align: center;
    line-height: 1.65;
    margin-top: 32px;
    animation: fadeUp .7s .2s ease both;
  }

  .hero-sub strong { color: var(--ieee-blue); font-weight: 600; }

  .hero-buttons {
    display: flex;
    gap: 18px;
    margin-top: 44px;
    flex-wrap: wrap;
    justify-content: center;
    animation: fadeUp .7s .3s ease both;
  }

  .btn-primary {
    background: var(--ieee-blue);
    color: var(--white);
    padding: 16px 36px;
    border-radius: 8px;
    font-family: 'Open Sans', sans-serif;
    font-size: 17px;
    font-weight: 600;
    text-decoration: none;
    border: 2px solid var(--ieee-blue);
    transition: all .2s;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .btn-primary:hover {
    background: var(--ieee-dark);
    border-color: var(--ieee-dark);
    transform: translateY(-2px);
    box-shadow: var(--button-primary-shadow);
  }

  .btn-secondary {
    background: var(--button-secondary-bg);
    color: var(--ieee-blue);
    padding: 16px 36px;
    border-radius: 8px;
    font-family: 'Open Sans', sans-serif;
    font-size: 17px;
    font-weight: 600;
    text-decoration: none;
    border: 2px solid var(--button-secondary-border);
    transition: all .2s;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .btn-secondary:hover {
    border-color: var(--button-secondary-hover-border);
    background: var(--button-secondary-hover-bg);
    transform: translateY(-2px);
  }

  .icon-svg {
    display: block;
    width: 24px;
    height: 24px;
  }

  .icon-svg--float {
    width: 28px;
    height: 28px;
  }

  .icon-svg--button {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
  }

  .icon-svg--button-light {
    filter: brightness(0) invert(1);
  }

  .btn-secondary-inverse {
    color: rgba(255,255,255,0.8);
    border-color: rgba(255,255,255,0.2);
  }

  .btn-secondary-inverse:hover {
    color: var(--white);
    border-color: rgba(255,255,255,0.45);
    background: rgba(255,255,255,0.08);
  }

  .map-button {
    margin-top: 36px;
    display: inline-flex;
  }

  /* ─── HERO FLOAT CARDS ─── */
  .hero-float {
    position: absolute;
    top: 50%;
    width: 274px;
    transform: translateY(-50%);
    z-index: 2;
    display: grid;
    gap: 14px;
  }

  .hero-float--left {
    left: calc(24px + var(--home-sidebar-width) - 16px);
  }

  .hero-float--right {
    right: 52px;
    width: 236px;
  }

  .hero-float-card {
    --hero-card-accent: rgba(0, 133, 202, 0.72);
    --hero-card-tint: rgba(0, 133, 202, 0.12);
    --hero-card-glow: rgba(0, 133, 202, 0.14);
    --hero-card-tilt: 0deg;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 16px 16px 14px;
    border-radius: 22px;
    background: var(--hero-card-surface);
    border: 1px solid var(--hero-card-border);
    border-top: 4px solid var(--hero-card-accent);
    box-shadow: var(--hero-card-shadow);
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    backdrop-filter: blur(18px);
    transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
    animation: heroFloatCardBob 8.8s ease-in-out infinite;
  }

  .hero-float-card::before {
    display: none;
  }

  .hero-float-card::after {
    display: none;
  }

  .hero-float-card:hover {
    transform: translateY(-8px) rotate(var(--hero-card-tilt));
    border-color: var(--hero-card-hover-border);
    border-top-color: var(--hero-card-accent);
    box-shadow: var(--hero-card-hover-shadow);
    animation-play-state: paused;
  }

  .hero-float-card:focus-visible {
    outline: 2px solid var(--ieee-light);
    outline-offset: 3px;
    transform: translateY(-8px) rotate(var(--hero-card-tilt));
    animation-play-state: paused;
  }

  .hero-float--left .hero-float-card:nth-child(1) {
    --hero-card-tilt: -2.8deg;
    margin-left: 10px;
    animation-delay: -1.2s;
  }

  .hero-float--right .hero-float-card:nth-child(1) {
    --hero-card-tilt: 2.4deg;
    margin-right: 8px;
    animation-delay: -1.8s;
  }

  .hero-float--right .hero-float-card:nth-child(2) {
    --hero-card-tilt: -2.8deg;
    margin-left: 14px;
    animation-delay: -3s;
  }

  .hero-float-card--featured {
    gap: 12px;
    padding: 18px 18px 16px;
    min-height: 196px;
  }

  .hero-float-card--steps {
    --hero-card-accent: rgba(0, 133, 202, 0.72);
    --hero-card-tint: rgba(0, 133, 202, 0.12);
    --hero-card-glow: rgba(0, 133, 202, 0.16);
  }

  .hero-float-card--materials {
    --hero-card-accent: rgba(191, 143, 0, 0.82);
    --hero-card-tint: rgba(191, 143, 0, 0.12);
    --hero-card-glow: rgba(191, 143, 0, 0.18);
  }

  .hero-float-card--faculty {
    --hero-card-accent: rgba(0, 110, 174, 0.66);
    --hero-card-tint: rgba(0, 110, 174, 0.12);
    --hero-card-glow: rgba(0, 110, 174, 0.14);
  }

  .hero-float-card--flow {
    --hero-card-accent: rgba(0, 90, 148, 0.68);
    --hero-card-tint: rgba(0, 90, 148, 0.12);
    --hero-card-glow: rgba(0, 90, 148, 0.14);
  }

  .hero-float-card--ieee {
    --hero-card-accent: rgba(0, 155, 216, 0.74);
    --hero-card-tint: rgba(0, 155, 216, 0.12);
    --hero-card-glow: rgba(0, 155, 216, 0.16);
  }

  .hero-float-head {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
  }

  .hero-float-kicker {
    font-family: 'Open Sans', sans-serif;
    font-size: 9px;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(0, 98, 155, 0.68);
  }

  .hero-float-icon {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: var(--hero-card-tint);
    border: 1px solid rgba(0, 98, 155, 0.08);
    flex-shrink: 0;
  }

  .hero-float-icon .icon-svg {
    filter: none;
  }

  .hero-float-title {
    position: relative;
    z-index: 1;
    margin: 0;
    font-family: 'Open Sans', sans-serif;
    font-size: 20px;
    line-height: 1.06;
    letter-spacing: -0.03em;
    color: var(--ieee-dark);
  }

  .hero-float-card--featured .hero-float-title {
    font-size: 26px;
    max-width: 10ch;
  }

  .hero-float-desc {
    position: relative;
    z-index: 1;
    margin: 0;
    font-family: 'Open Sans', sans-serif;
    font-size: 13px;
    line-height: 1.45;
    color: var(--slate);
  }

  .hero-float-tags {
    position: relative;
    z-index: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
  }

  .hero-float-tag {
    padding: 5px 9px;
    border-radius: 999px;
    background: var(--hero-card-tint);
    font-family: 'Open Sans', sans-serif;
    font-size: 10px;
    font-weight: 700;
    color: rgba(0, 72, 116, 0.88);
  }

  .hero-float-link {
    position: relative;
    z-index: 1;
    margin-top: auto;
    font-family: 'Open Sans', sans-serif;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ieee-blue);
  }

  @keyframes heroFloatCardBob {
    0%, 100% { transform: translateY(0) rotate(var(--hero-card-tilt)); }
    50% { transform: translateY(-10px) rotate(var(--hero-card-tilt)); }
  }

  @media (max-width: 1360px) {
    .hero-float {
      width: 244px;
      transform: translateY(-50%) scale(0.92);
    }

    .hero-float--left {
      left: calc(24px + var(--home-sidebar-width) - 44px);
      transform-origin: left center;
    }

    .hero-float--right {
      right: 10px;
      transform-origin: right center;
    }

    .hero-float-card--featured .hero-float-title {
      font-size: 24px;
    }
  }

  @media (max-width: 1120px) {
    .hero-float {
      display: none;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    .hero-float-card {
      animation: none;
    }
  }

  /* ─── SECTION COMMON ─── */
  section {
    position: relative;
    z-index: 1;
    padding: 96px 48px;
    max-width: 1280px;
    margin: 0 auto;
  }

  .section-label {
    font-family: 'Open Sans', sans-serif;
    font-size: 11px;
    color: var(--ieee-blue);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .section-label::before {
    content: '';
    display: block;
    width: 24px; height: 2px;
    background: var(--ieee-gold);
  }

  .section-title {
    font-family: 'Open Sans', sans-serif;
    font-weight: 800;
    font-size: clamp(40px, 4.8vw, 64px);
    color: var(--ieee-dark);
    line-height: 1.05;
    letter-spacing: -2px;
    margin-bottom: 20px;
  }

  .section-desc {
    font-size: 20px;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 660px;
    font-weight: 300;
  }

  /* ─── QUICK INDEX ─── */
  .guide-index {
    position: relative;
    z-index: 1;
    padding: 0 0 80px;
  }

  .guide-index-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 48px;
  }

  .index-groups {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 40px;
  }

  .index-group {
    background: rgba(255,255,255,0.82);
    border: 1px solid rgba(0,98,155,0.12);
    border-radius: 20px;
    padding: 24px 22px;
    box-shadow: 0 16px 36px rgba(0,48,87,0.06);
  }

  .index-group--wide {
    grid-column: 1 / -1;
  }

  .index-group-title {
    font-family: 'Open Sans', sans-serif;
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--ieee-blue);
  }

  .index-list {
    display: grid;
    gap: 12px;
    margin-top: 18px;
  }

  .index-list--disciplines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .index-link {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 14px 14px 13px;
    border-radius: 14px;
    border: 1px solid rgba(0,98,155,0.08);
    background: rgba(0,98,155,0.04);
    text-decoration: none;
    transition: transform .2s, border-color .2s, background .2s, box-shadow .2s;
  }

  .index-link:hover {
    transform: translateY(-2px);
    border-color: rgba(0,98,155,0.2);
    background: rgba(0,98,155,0.07);
    box-shadow: 0 10px 24px rgba(0,48,87,0.06);
  }

  .index-link-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--ieee-dark);
  }

  .index-link-meta {
    font-size: 13px;
    line-height: 1.55;
    color: var(--text-muted);
  }

  .index-spotlight {
    position: relative;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
    margin-top: 34px;
    padding: 28px 30px;
    border-radius: 24px;
    border: 1px solid rgba(0,98,155,0.14);
    border-top: 6px solid var(--ieee-blue);
    background: rgba(255,255,255,0.98);
    box-shadow: 0 20px 42px rgba(0,48,87,0.08);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: transform .22s, border-color .22s, box-shadow .22s;
  }

  .index-spotlight::before {
    display: none;
  }

  .index-spotlight::after {
    display: none;
  }

  .index-spotlight:hover {
    transform: translateY(-3px);
    border-color: rgba(0,98,155,0.24);
    box-shadow: 0 24px 50px rgba(0,48,87,0.12);
  }

  .index-spotlight-icon,
  .index-spotlight-copy,
  .index-spotlight-cta {
    position: relative;
    z-index: 1;
  }

  .index-spotlight-icon {
    width: 72px;
    height: 72px;
    border-radius: 22px;
    border: 1px solid rgba(0,98,155,0.16);
    background: rgba(235, 244, 250, 0.96);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.8);
  }

  .index-spotlight-icon .icon-svg {
    width: 30px;
    height: 30px;
  }

  .index-spotlight-copy {
    min-width: 0;
  }

  .index-spotlight-kicker {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.1px;
    text-transform: uppercase;
    color: var(--ieee-blue);
  }

  .index-spotlight-title {
    margin-top: 10px;
    font-family: 'Open Sans', sans-serif;
    font-size: clamp(25px, 3vw, 31px);
    line-height: 1.12;
    letter-spacing: -0.9px;
    color: var(--ieee-dark);
  }

  .index-spotlight-desc {
    max-width: 64ch;
    margin-top: 12px;
    font-size: 15px;
    line-height: 1.75;
    color: var(--text-muted);
  }

  .index-spotlight-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
  }

  .index-spotlight-tag {
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(0,98,155,0.08);
    border: 1px solid rgba(0,98,155,0.08);
    font-size: 11px;
    font-weight: 700;
    color: var(--ieee-dark);
    letter-spacing: 0.2px;
  }

  .index-spotlight-cta {
    justify-self: end;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 20px;
    border-radius: 999px;
    background: var(--ieee-dark);
    color: var(--white);
    font-size: 13px;
    font-weight: 700;
    white-space: nowrap;
    transition: transform .2s, background .2s, box-shadow .2s;
    box-shadow: 0 14px 28px rgba(0,48,87,0.16);
  }

  .index-spotlight:hover .index-spotlight-cta {
    transform: translateX(4px);
    background: var(--ieee-blue);
  }

  /* ─── FEATURES ─── */
  .features-section {
    background: var(--features-bg);
    max-width: 100%;
    padding: 96px 0;
  }

  .features-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 48px;
  }

  .features-section .section-label { color: rgba(255,255,255,0.5); }
  .features-section .section-title { color: var(--white); }
  .features-section .section-desc { color: var(--features-muted); }

  .features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
    margin-top: 64px;
  }

  .feature-card {
    --feature-accent: rgba(56, 162, 219, 0.18);
    --feature-accent-strong: var(--ieee-light);
    background: var(--features-card-bg);
    border: 1px solid var(--features-card-border);
    border-top: 3px solid var(--feature-accent-strong);
    padding: 48px 42px;
    transition: background .25s;
    position: relative;
    overflow: hidden;
    display: block;
    color: inherit;
    text-decoration: none;
  }

  .feature-card::before {
    display: none;
  }

  .feature-card:nth-child(2) {
    --feature-accent: rgba(24, 126, 143, 0.18);
    --feature-accent-strong: var(--ieee-teal);
  }

  .feature-card:nth-child(3) {
    --feature-accent: rgba(93, 103, 214, 0.18);
    --feature-accent-strong: var(--ieee-indigo);
  }

  .feature-card:nth-child(4) {
    --feature-accent: rgba(211, 154, 49, 0.18);
    --feature-accent-strong: var(--ieee-gold);
  }

  .feature-card:nth-child(5) {
    --feature-accent: rgba(46, 155, 116, 0.18);
    --feature-accent-strong: var(--ieee-mint);
  }

  .feature-card:hover { background: var(--features-card-hover-bg); }

  .feature-card:first-child { border-radius: 16px 0 0 16px; }
  .feature-card:last-child { border-radius: 0 16px 16px 0; }

  .feature-icon {
    width: 60px; height: 60px;
    background: var(--feature-accent);
    border: 1px solid color-mix(in srgb, var(--feature-accent-strong) 44%, transparent);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
  }

  .feature-num {
    position: absolute;
    top: 24px; right: 28px;
    font-family: 'Open Sans', sans-serif;
    font-size: 11px;
    color: rgba(255,255,255,0.15);
    letter-spacing: 1px;
  }

  .feature-title {
    font-family: 'Open Sans', sans-serif;
    font-weight: 800;
    font-size: 24px;
    color: var(--white);
    margin-bottom: 14px;
  }

  .feature-desc {
    font-size: 16px;
    color: var(--features-muted);
    line-height: 1.7;
    font-weight: 300;
  }

  .feature-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 28px;
    font-size: 14px;
    font-weight: 600;
    color: var(--feature-accent-strong);
    text-decoration: none;
    transition: gap .2s;
  }

  .feature-card:hover .feature-link,
  .feature-card:focus-visible .feature-link { gap: 10px; }

  .visitor-route {
    margin-top: 26px;
    padding: 24px 26px;
    border: 1px solid var(--visitor-route-border);
    background: var(--visitor-route-bg);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  }

  .visitor-route__header {
    display: grid;
    gap: 8px;
    margin-bottom: 18px;
  }

  .visitor-route__kicker {
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.72);
  }

  .visitor-route__desc {
    max-width: 780px;
    font-size: 15px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.7);
  }

  .visitor-route__steps {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
  }

  .visitor-route__step {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 14px;
    align-items: flex-start;
    padding: 14px 16px;
    text-decoration: none;
    color: var(--white);
    border: 1px solid var(--visitor-step-border);
    background: var(--visitor-step-bg);
    transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
  }

  .visitor-route__step:hover,
  .visitor-route__step:focus-visible {
    transform: translateY(-2px);
    border-color: var(--visitor-step-hover-border);
    background: var(--visitor-step-hover-bg);
  }

  .visitor-route__step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.08);
    color: var(--white);
    font-size: 15px;
    font-weight: 800;
  }

  .visitor-route__step-copy {
    display: grid;
    gap: 6px;
  }

  .visitor-route__step-copy strong {
    font-size: 16px;
    line-height: 1.35;
  }

  .visitor-route__step-copy small {
    font-size: 13px;
    line-height: 1.55;
    color: rgba(255, 255, 255, 0.68);
  }

  /* ─── MATERIALS ─── */
  .materials-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    grid-template-rows: repeat(3, auto);
    gap: 24px;
    margin-top: 64px;
  }

  .mat-card {
    background: var(--white);
    border: 1px solid rgba(0,98,155,0.1);
    border-radius: 16px;
    padding: 42px;
    transition: all .25s;
    position: relative;
    overflow: hidden;
    display: block;
    color: inherit;
    text-decoration: none;
  }

  .mat-card:hover {
    border-color: rgba(0,98,155,0.25);
    transform: translateY(-4px);
    box-shadow: 0 20px 48px rgba(0,48,87,0.1);
  }

  .mat-card.featured {
    grid-row: span 3;
    background: var(--ieee-blue);
    border-color: var(--ieee-blue);
  }

  .mat-card.featured .mat-title { color: var(--white); }
  .mat-card.featured .mat-desc { color: rgba(255,255,255,0.65); }
  .mat-card.featured .mat-icon { background: rgba(255,255,255,0.12); color: var(--white); }
  .mat-card.featured .mat-tag { background: rgba(255,255,255,0.15); color: var(--white); }
  .mat-card.featured .mat-link { color: var(--white); }
  .mat-card.featured .icon-svg { filter: brightness(0) invert(1); }

  .mat-card.featured::before {
    content: '';
    position: absolute;
    bottom: -60px; right: -60px;
    width: 240px; height: 240px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
  }

  .mat-icon {
    width: 52px; height: 52px;
    background: rgba(0,98,155,0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
  }

  .icon-svg--material {
    width: 22px;
    height: 22px;
  }

  .mat-title {
    font-family: 'Open Sans', sans-serif;
    font-weight: 800;
    font-size: 26px;
    color: var(--ieee-dark);
    margin-bottom: 10px;
  }

  .mat-desc {
    font-size: 16px;
    color: var(--text-muted);
    line-height: 1.7;
    font-weight: 300;
  }

  .mat-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
  }

  .mat-tag {
    background: rgba(0,98,155,0.08);
    color: var(--ieee-blue);
    font-size: 12px;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 6px;
    letter-spacing: 0.3px;
    font-family: 'Open Sans', sans-serif;
  }

  .mat-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 28px;
    font-size: 15px;
    font-weight: 600;
    color: var(--ieee-blue);
    text-decoration: none;
    transition: gap .2s;
  }

  .mat-card:hover .mat-link,
  .mat-card:focus-visible .mat-link { gap: 10px; }

  .hero-logic-mode-button:focus-visible,
  .hero-node-toggle:focus-visible,
  .feature-card:focus-visible,
  .mat-card:focus-visible {
    outline: 2px solid var(--ieee-gold);
    outline-offset: 4px;
  }

  /* ─── MAP SECTION ─── */
  .map-section {
    background: linear-gradient(135deg, var(--ieee-dark) 0%, #001d3a 100%);
    max-width: 100%;
    padding: 96px 0;
    position: relative;
    z-index: 1;
    overflow: hidden;
  }

  .map-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(0,133,202,0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(0,133,202,0.05) 1px, transparent 1px);
    background-size: 32px 32px;
  }

  .map-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 48px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
  }

  .map-content .section-label { color: rgba(255,255,255,0.4); }
  .map-content .section-title { color: var(--white); }
  .map-content .section-desc { color: rgba(255,255,255,0.5); }

  .map-features {
    list-style: none;
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .map-feat-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    font-size: 14px;
    color: rgba(255,255,255,0.65);
    font-weight: 300;
    line-height: 1.5;
  }

  .map-feat-icon {
    width: 28px; height: 28px;
    background: rgba(0,133,202,0.15);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
  }

  .icon-svg--map {
    width: 16px;
    height: 16px;
  }

  .map-visual {
    position: relative;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 20px;
    padding: 32px;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
  }

  .map-visual--frame {
    padding: 0;
    overflow: hidden;
  }

  .map-visual-frame {
    width: 100%;
    height: 460px;
    border: none;
    border-radius: 12px;
  }

  /* Simplified building map */

  /* ─── TESTIMONIALS / INFO CARDS ─── */
  .info-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 64px;
  }

  .info-card {
    background: var(--white);
    border: 1px solid rgba(0,98,155,0.1);
    border-radius: 16px;
    padding: 38px;
    transition: all .25s;
  }

  .info-card:hover {
    border-color: rgba(0,98,155,0.22);
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0,48,87,0.08);
  }

  .info-quote {
    font-size: 17px;
    color: var(--text);
    line-height: 1.7;
    font-style: italic;
    font-weight: 300;
    margin-bottom: 24px;
  }

  .info-author {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .info-avatar {
    width: 46px; height: 46px;
    background: linear-gradient(135deg, var(--ieee-blue), var(--ieee-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Open Sans', sans-serif;
    font-weight: 800;
    font-size: 17px;
    color: var(--white);
    flex-shrink: 0;
  }

  .info-name {
    font-family: 'Open Sans', sans-serif;
    font-weight: 800;
    font-size: 16px;
    color: var(--ieee-dark);
  }

  .info-role {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2px;
  }

  /* ─── IEEE BADGE SECTION ─── */
  .ieee-section {
    max-width: 100%;
    padding: 80px 0;
    background: rgba(0,98,155,0.04);
    border-top: 1px solid rgba(0,98,155,0.1);
    border-bottom: 1px solid rgba(0,98,155,0.1);
  }

  .ieee-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
  }

  .ieee-text h3 {
    font-family: 'Open Sans', sans-serif;
    font-weight: 800;
    font-size: 28px;
    color: var(--ieee-dark);
    letter-spacing: -1px;
  }

  .ieee-text p {
    font-size: 15px;
    color: var(--text-muted);
    margin-top: 8px;
    max-width: 480px;
    line-height: 1.65;
    font-weight: 300;
  }

  .ieee-badge-group {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-shrink: 0;
  }

  .ieee-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
  }

  .ieee-badge-icon {
    width: 72px; height: 72px;
    background: var(--ieee-blue);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Open Sans', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
    letter-spacing: -1px;
    box-shadow: 0 8px 24px rgba(0,98,155,0.25);
  }

  .ieee-badge-icon--dark {
    background: #003057;
    font-size: 14px;
  }

  .ieee-badge-label {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    text-align: center;
    letter-spacing: 0.3px;
  }

  .ieee-divider {
    width: 1px;
    height: 60px;
    background: rgba(0,98,155,0.15);
  }

  /* ─── CTA ─── */
  .cta-section {
    max-width: 100%;
    background: var(--ieee-blue);
    padding: 96px 48px;
    text-align: center;
    position: relative;
    z-index: 1;
    overflow: hidden;
  }

  .cta-section::before {
    content: 'Helpieee';
    position: absolute;
    font-family: 'Open Sans', sans-serif;
    font-weight: 800;
    font-size: 220px;
    color: rgba(255,255,255,0.04);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    letter-spacing: -10px;
    white-space: nowrap;
    pointer-events: none;
  }

  .cta-label {
    font-family: 'Open Sans', sans-serif;
    font-size: 11px;
    color: rgba(255,255,255,0.5);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
  }

  .cta-title {
    font-family: 'Open Sans', sans-serif;
    font-weight: 800;
    font-size: clamp(44px, 5.8vw, 76px);
    color: var(--white);
    letter-spacing: -2px;
    line-height: 1.05;
    margin-bottom: 20px;
  }

  .cta-title span { color: var(--white); opacity: 0.75; }

  .cta-desc {
    font-size: 20px;
    color: rgba(255,255,255,0.65);
    max-width: 620px;
    margin: 0 auto 40px;
    line-height: 1.65;
    font-weight: 300;
  }

  .cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
  }

  .btn-white {
    background: var(--white);
    color: var(--ieee-blue);
    padding: 14px 32px;
    border-radius: 8px;
    font-family: 'Open Sans', sans-serif;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all .2s;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .btn-white:hover {
    background: var(--ieee-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  }

  .btn-white:hover .icon-svg--button {
    filter: brightness(0) invert(1);
  }

  .btn-outline-white {
    background: transparent;
    color: var(--white);
    padding: 14px 32px;
    border-radius: 8px;
    font-family: 'Open Sans', sans-serif;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border: 2px solid rgba(255,255,255,0.35);
    transition: all .2s;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .btn-outline-white:hover {
    border-color: var(--white);
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
  }

  /* ─── FOOTER ─── */
  footer {
    background: #00182e;
    padding: 48px;
    position: relative;
    z-index: 1;
  }

  .footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
  }

  .footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .footer-logo-text {
    font-family: 'Open Sans', sans-serif;
    font-weight: 800;
    font-size: 22px;
    color: var(--white);
    letter-spacing: -0.5px;
    line-height: 1;
    text-transform: uppercase;
  }

  .footer-sub {
    font-family: Calibri, 'Open Sans', sans-serif;
    font-size: 12px;
    color: rgba(255,255,255,0.52);
    margin-top: 6px;
    font-style: italic;
    line-height: 1.55;
  }

  .footer-links {
    display: flex;
    gap: 28px;
    list-style: none;
  }

  .footer-links a {
    font-size: 13px;
    color: rgba(255,255,255,0.4);
    text-decoration: none;
    transition: color .2s;
  }

  .footer-links a:hover { color: rgba(255,255,255,0.8); }

  .footer-copy {
    font-family: Calibri, 'Open Sans', sans-serif;
    font-size: 12px;
    color: rgba(255,255,255,0.3);
    line-height: 1.5;
  }

  /* ─── ANIMATIONS ─── */
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
  }

  @keyframes fadeDown {
    from { opacity: 0; transform: translateY(-12px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity .7s ease, transform .7s ease;
  }

  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* ─── SCROLLBAR ─── */
  ::-webkit-scrollbar { width: 6px; }
  ::-webkit-scrollbar-track { background: var(--off-white); }
  ::-webkit-scrollbar-thumb { background: rgba(0,98,155,0.25); border-radius: 3px; }
  ::-webkit-scrollbar-thumb:hover { background: var(--ieee-blue); }

  @media (max-width: 1100px) {
    .home-sidebar {
      position: fixed;
      top: 80px;
      left: 12px;
      bottom: 12px;
      width: min(340px, calc(100vw - 24px));
      height: auto;
      padding: 0;
      transform: translateX(calc(-100% - 24px));
      transition: transform 0.24s ease;
      z-index: 135;
    }

    .home-sidebar__panel {
      height: 100%;
      margin-top: 0;
      max-height: none;
    }

    .home-sidebar__mobile-trigger {
      position: fixed;
      left: 16px;
      bottom: 22px;
      z-index: 145;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 46px;
      padding: 0 14px 0 12px;
      border-radius: 999px;
      border: 1px solid rgba(0, 98, 155, 0.16);
      background: rgba(255, 255, 255, 0.94);
      color: var(--ieee-dark);
      font-family: 'Open Sans', sans-serif;
      font-size: 13px;
      font-weight: 700;
      box-shadow: 0 18px 38px rgba(0, 48, 87, 0.16);
      backdrop-filter: blur(14px);
      cursor: pointer;
    }

    .home-sidebar__backdrop {
      position: fixed;
      inset: 0;
      display: block;
      opacity: 0;
      pointer-events: none;
      background: rgba(0, 26, 47, 0.36);
      transition: opacity 0.24s ease;
      z-index: 130;
    }

    body.page-home.sidebar-open {
      overflow: hidden;
    }

    body.page-home.sidebar-open .home-sidebar {
      transform: translateX(0);
    }

    body.page-home.sidebar-open .home-sidebar__backdrop {
      opacity: 1;
      pointer-events: auto;
    }
  }

  @media (max-width: 900px) {
    html {
      scroll-padding-top: 28px;
    }

    nav {
      position: static;
      height: auto;
      padding: 12px 16px;
      grid-template-columns: minmax(0, 1fr) auto;
      row-gap: 10px;
      column-gap: 12px;
    }
    .nav-logo {
      grid-column: 1;
      grid-row: 1;
    }
    .nav-logo-badge {
      width: 30px;
      height: 37px;
    }
    .nav-logo-meta { display: none; }
    .nav-logo-text { font-size: 18px; }
    .nav-search-shell {
      grid-column: 1 / -1;
      grid-row: 2;
      max-width: none;
    }
    .nav-links {
      display: flex;
      grid-column: 2;
      grid-row: 1;
      width: auto;
      gap: 0;
      flex-wrap: nowrap;
      justify-self: end;
      align-self: start;
      padding-bottom: 0;
      overflow: visible;
    }
    .nav-links li:not(.nav-theme-item) { display: none; }
    .nav-links li {
      flex: 0 0 auto;
    }
    .nav-links a,
    .nav-links button {
      display: inline-flex;
      align-items: center;
      min-height: 38px;
      padding: 0 12px;
      border-radius: 999px;
      border: 1px solid rgba(255,255,255,0.12);
      background: rgba(255,255,255,0.04);
      white-space: nowrap;
      font-size: 11px;
    }
    .nav-links .theme-toggle {
      padding: 0 10px;
    }
    .nav-links .theme-toggle__label {
      display: none;
    }
    .nav-search__input {
      min-height: 42px;
    }
    .nav-cta {
      padding: 0 14px;
      min-height: 38px;
    }
    .hero { min-height: auto; padding: 36px 16px 48px; }
    .hero-network { display: none; }
    .hero-float { display: none; }
    .hero-tag {
      margin-bottom: 24px;
      padding: 6px 12px;
      font-size: 10px;
    }
    .hero-title {
      font-size: clamp(42px, 14vw, 68px);
      line-height: 0.94;
      letter-spacing: -2.8px;
    }
    .hero-sub {
      max-width: 34ch;
      font-size: 16px;
      margin-top: 20px;
    }
    .hero-buttons {
      width: 100%;
      gap: 12px;
      max-width: 420px;
      margin-top: 28px;
    }
    .btn-primary,
    .btn-secondary,
    .btn-white,
    .btn-outline-white {
      width: 100%;
      justify-content: center;
      padding: 14px 18px;
    }
    section { padding: 56px 16px; }
    .features-section,
    .map-section,
    .ieee-section { padding: 64px 0; }
    .guide-index { padding: 0 0 64px; }
    .guide-index-inner,
    .features-inner { padding: 0 16px; }
    .index-spotlight {
      grid-template-columns: 1fr;
      gap: 18px;
      margin-top: 28px;
      padding: 24px 20px;
    }
    .index-spotlight-icon {
      width: 64px;
      height: 64px;
      border-radius: 18px;
    }
    .index-spotlight-title { font-size: clamp(22px, 7vw, 28px); }
    .index-spotlight-desc { font-size: 15px; }
    .index-spotlight-tags {
      flex-wrap: nowrap;
      overflow-x: auto;
      padding-bottom: 4px;
      scrollbar-width: none;
      -webkit-overflow-scrolling: touch;
    }
    .index-spotlight-tags::-webkit-scrollbar { display: none; }
    .index-spotlight-tag { flex: 0 0 auto; }
    .index-spotlight-cta {
      width: 100%;
      justify-self: stretch;
    }
    .index-groups { grid-template-columns: 1fr; gap: 16px; margin-top: 32px; }
    .index-group { padding: 22px 18px; }
    .index-list--disciplines { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .visitor-route__steps { grid-template-columns: 1fr; gap: 16px; }
    .features-grid,
    .materials-grid,
    .info-cards { gap: 16px; margin-top: 40px; }
    .feature-card:first-child, .feature-card:last-child { border-radius: 16px; }
    .feature-card,
    .mat-card,
    .info-card { padding: 24px 20px; }
    .index-link { padding: 14px 13px 13px; }
    .section-title {
      font-size: clamp(28px, 8vw, 40px);
      letter-spacing: -1.5px;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 16px;
      line-height: 1.7;
    }
    .feature-title,
    .mat-title { font-size: 20px; }
    .materials-grid { grid-template-columns: 1fr; }
    .mat-card.featured { grid-row: auto; }
    .map-inner { grid-template-columns: 1fr; gap: 28px; padding: 0 16px; }
    .map-visual {
      padding: 16px;
      border-radius: 18px;
    }
    .map-visual-frame { height: 320px; }
    .info-cards { grid-template-columns: 1fr; }
    .ieee-inner { flex-direction: column; padding: 0 16px; text-align: center; }
    .ieee-text p { margin: 8px auto 0; }
    footer { padding: 32px 16px 40px; }
    .footer-inner { flex-direction: column; text-align: center; gap: 20px; }
    .footer-links { justify-content: center; flex-wrap: wrap; gap: 16px; }
    .cta-section { padding: 56px 16px; }
  }

  /* ─── FLUXO SECTION ─── */
  .fluxo-section {
    position: relative;
    z-index: 1;
    padding: 96px 0 64px;
    background: var(--off-white);
  }

  .fluxo-header-outer {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 48px;
  }

  .fluxo-embed {
    max-width: 1280px;
    margin: 40px auto 0;
    padding: 0 48px;
  }

  .fluxo-preview-frame {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 24px 48px rgba(0, 48, 87, 0.12);
  }

  .fluxo-preview-link {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    padding: 24px;
    text-decoration: none;
    background: rgba(0, 48, 87, 0.16);
    transition: background 0.18s ease, box-shadow 0.18s ease;
  }

  .fluxo-preview-link:hover,
  .fluxo-preview-link:focus-visible {
    background: rgba(0, 48, 87, 0.26);
  }

  .fluxo-preview-link:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.9);
    outline-offset: -8px;
  }

  .fluxo-preview-link__chip {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 44px;
    padding: 0 16px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    background: rgba(255, 255, 255, 0.92);
    color: var(--ieee-dark);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: -0.01em;
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.12);
  }

  .fluxo-preview-link__chip::after {
    content: '+';
    font-size: 18px;
    line-height: 1;
    color: var(--ieee-blue);
  }

  .fluxo-section-label,
  .fluxo-section-title {
    margin-bottom: 12px;
  }

  .fluxo-iframe {
    width: 100%;
    height: 720px;
    border: none;
    border-radius: 16px;
    display: block;
    pointer-events: none;
  }

  .fluxo-note {
    margin-top: 12px;
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
  }

  @media (max-width: 900px) {
    .fluxo-header-outer, .fluxo-embed { padding: 0 24px; }
    #fluxo-iframe { height: 560px; }
  }

  @media (max-width: 640px) {
    html {
      scroll-padding-top: 24px;
    }

    nav {
      padding: 10px 12px 12px;
      grid-template-columns: minmax(0, 1fr) auto;
      row-gap: 10px;
    }
    .nav-logo {
      min-width: 0;
      max-width: 100%;
      padding-right: 6px;
    }
    .nav-logo-badge {
      width: 28px;
      height: 34px;
    }
    .nav-logo-lockup {
      min-width: 0;
      overflow: hidden;
    }
    .nav-logo-text { font-size: 17px; }
    .nav-logo-meta { display: none; }
    .nav-logo-text {
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .nav-search-shell {
      grid-column: 1 / -1;
    }
    .nav-links {
      width: auto;
      justify-self: end;
    }
    .nav-links a,
    .nav-links button {
      min-height: 36px;
      padding: 0 11px;
      font-size: 10.5px;
    }
    .nav-search__input {
      min-height: 42px;
      padding-right: 80px;
    }
    .nav-search__clear {
      min-height: 30px;
      padding: 0 10px;
    }
    .hero { padding: 28px 12px 40px; }
    .hero-title {
      font-size: clamp(38px, 15vw, 56px);
      letter-spacing: -2.2px;
    }
    .hero-sub,
    .section-desc,
    .feature-desc,
    .mat-desc,
    .info-quote,
    .ieee-text p,
    .cta-desc {
      font-size: 15px;
    }
    .hero-buttons,
    .cta-buttons {
      flex-direction: column;
    }
    .guide-index { padding: 0 0 56px; }
    .index-group-title { font-size: 10px; }
    .index-spotlight-title { font-size: 22px; }
    .index-spotlight-desc { font-size: 14px; }
    .index-spotlight-tag { font-size: 10px; }
    .index-group { padding: 20px 16px; }
    .index-list { gap: 10px; }
    .index-link { padding: 12px 12px 11px; }
    .index-link-title { font-size: 14px; }
    .index-link-meta { font-size: 12.5px; }
    .feature-card,
    .mat-card,
    .info-card {
      padding: 22px 18px;
    }
    .feature-icon {
      width: 48px;
      height: 48px;
      margin-bottom: 20px;
    }
    .feature-num {
      top: 20px;
      right: 20px;
    }
    .mat-tag {
      font-size: 10px;
    }
    .map-visual-frame {
      height: 280px;
    }
    .cta-title {
      font-size: clamp(30px, 10vw, 42px);
      letter-spacing: -1.6px;
    }
    .cta-section::before {
      font-size: 120px;
    }
    .footer-links {
      gap: 12px;
    }
    .fluxo-header-outer,
    .fluxo-embed {
      padding: 0 16px;
    }
    #fluxo-iframe {
      height: 420px;
    }

    .home-sidebar__mobile-trigger {
      left: 12px;
      bottom: 70px;
      min-height: 44px;
      padding: 0 12px 0 10px;
      font-size: 12px;
    }
  }

  .theme-toggle {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 140;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 48px;
    padding: 0 14px 0 12px;
    border: 1px solid rgba(0, 98, 155, 0.16);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.9);
    color: var(--ieee-dark);
    font-family: 'Open Sans', sans-serif;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    backdrop-filter: blur(14px);
    box-shadow: 0 18px 38px rgba(0, 48, 87, 0.14);
    transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
  }

  .theme-toggle:hover {
    transform: translateY(-2px);
    border-color: rgba(0, 98, 155, 0.3);
    box-shadow: 0 20px 42px rgba(0, 48, 87, 0.18);
  }

  .theme-toggle:focus-visible {
    outline: 2px solid var(--ieee-light);
    outline-offset: 3px;
  }

  .theme-toggle__icon {
    width: 22px;
    height: 22px;
    border-radius: 999px;
    background: linear-gradient(135deg, #ffd56b 0%, #f4a617 100%);
    box-shadow: inset -3px -3px 0 rgba(255, 255, 255, 0.35);
    flex-shrink: 0;
  }

  .theme-toggle[data-theme-current='dark'] .theme-toggle__icon {
    background: linear-gradient(135deg, #c1dbff 0%, #6aaeff 100%);
    box-shadow: inset -4px -4px 0 rgba(4, 10, 18, 0.28);
  }

  html[data-theme='dark'] body.page-home {
    background:
      radial-gradient(circle at top left, rgba(0, 133, 202, 0.14), transparent 22%),
      linear-gradient(180deg, #07101a 0%, #0a1320 100%);
  }

  html[data-theme='dark'] .home-intro {
    background:
      radial-gradient(circle at center, rgba(0, 133, 202, 0.22) 0%, rgba(0, 133, 202, 0.1) 18%, transparent 54%),
      linear-gradient(180deg, rgba(7, 16, 26, 0.98) 0%, rgba(10, 19, 32, 0.99) 100%);
  }

  html[data-theme='dark'] .home-intro::before {
    background-image:
      linear-gradient(rgba(95, 149, 190, 0.08) 1px, transparent 1px),
      linear-gradient(90deg, rgba(95, 149, 190, 0.08) 1px, transparent 1px);
  }

  html[data-theme='dark'] .home-intro__label {
    color: rgba(234, 244, 255, 0.62);
  }

  html[data-theme='dark'] .home-intro__mark--light {
    display: none;
  }

  html[data-theme='dark'] .home-intro__mark--dark {
    display: block;
    opacity: 1;
  }

  html[data-theme='dark'] body.page-home::before {
    background-image:
      linear-gradient(rgba(95, 149, 190, 0.08) 1px, transparent 1px),
      linear-gradient(90deg, rgba(95, 149, 190, 0.08) 1px, transparent 1px);
  }

  html[data-theme='dark'] nav {
    background: rgba(5, 12, 20, 0.86);
    border-bottom-color: rgba(79, 153, 208, 0.22);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
  }

  html[data-theme='dark'] .nav-links a {
    color: rgba(234, 244, 255, 0.74);
  }

  html[data-theme='dark'] .nav-links button {
    color: rgba(234, 244, 255, 0.74);
  }

  html[data-theme='dark'] .nav-links .theme-toggle {
    background: rgba(255, 255, 255, 0.08);
    color: rgba(234, 244, 255, 0.86);
    border-color: rgba(122, 191, 244, 0.22);
  }

  html[data-theme='dark'] .nav-links .theme-toggle:hover {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(154, 210, 251, 0.32);
    color: #edf6ff;
  }

  html[data-theme='dark'] .nav-cta {
    background: rgba(241, 247, 255, 0.96);
    color: #08233d !important;
  }

  html[data-theme='dark'] .nav-cta:hover {
    background: #d7e8fb !important;
  }

  html[data-theme='dark'] .hero-glow {
    background: radial-gradient(ellipse, rgba(0, 133, 202, 0.32) 0%, transparent 72%);
  }

  html[data-theme='dark'] .hero-network-path {
    stroke: rgba(110, 184, 235, 0.24);
  }

  html[data-theme='dark'] .hero-network-path--alt {
    stroke: rgba(64, 130, 194, 0.2);
  }

  html[data-theme='dark'] .hero-network-node {
    fill: #0c1724;
    stroke: #6bc0ff;
  }

  html[data-theme='dark'] .hero-tag {
    background: rgba(0, 133, 202, 0.12);
    border-color: rgba(85, 175, 233, 0.26);
    color: #8fd4ff;
  }

  html[data-theme='dark'] .hero-title,
  html[data-theme='dark'] .section-title,
  html[data-theme='dark'] .hero-float-title,
  html[data-theme='dark'] .index-link-title,
  html[data-theme='dark'] .index-spotlight-title,
  html[data-theme='dark'] .mat-title,
  html[data-theme='dark'] .info-quote,
  html[data-theme='dark'] .info-name,
  html[data-theme='dark'] .ieee-text h3 {
    color: #edf6ff;
  }

  html[data-theme='dark'] .hero-sub,
  html[data-theme='dark'] .section-desc,
  html[data-theme='dark'] .hero-float-desc,
  html[data-theme='dark'] .hero-node-caption,
  html[data-theme='dark'] .index-spotlight-desc,
  html[data-theme='dark'] .index-link-meta,
  html[data-theme='dark'] .mat-desc,
  html[data-theme='dark'] .feature-desc,
  html[data-theme='dark'] .map-feat-item,
  html[data-theme='dark'] .info-role,
  html[data-theme='dark'] .ieee-text p,
  html[data-theme='dark'] .fluxo-note {
    color: #9eb2c8;
  }

  html[data-theme='dark'] .btn-secondary {
    color: #8fd4ff;
    border-color: rgba(99, 183, 240, 0.28);
    background: rgba(10, 23, 37, 0.52);
  }

  html[data-theme='dark'] .btn-secondary:hover {
    border-color: rgba(123, 196, 245, 0.42);
    background: rgba(14, 33, 52, 0.82);
  }

  html[data-theme='dark'] .home-sidebar__panel {
    background: rgba(9, 20, 33, 0.92);
    border-color: rgba(88, 153, 194, 0.18);
    box-shadow: 0 24px 52px rgba(0, 0, 0, 0.28);
  }

  html[data-theme='dark'] .home-sidebar__title,
  html[data-theme='dark'] .home-sidebar__spotlight-title,
  html[data-theme='dark'] .home-sidebar__link-title {
    color: #edf6ff;
  }

  html[data-theme='dark'] .home-sidebar__desc,
  html[data-theme='dark'] .home-sidebar__spotlight-desc,
  html[data-theme='dark'] .home-sidebar__link-meta {
    color: #9eb2c8;
  }

  html[data-theme='dark'] .home-sidebar__eyebrow,
  html[data-theme='dark'] .home-sidebar__group-label,
  html[data-theme='dark'] .home-sidebar__spotlight-kicker,
  html[data-theme='dark'] .home-sidebar__spotlight-cta {
    color: #8fd4ff;
  }

  html[data-theme='dark'] .home-sidebar__toggle,
  html[data-theme='dark'] .home-sidebar__mobile-trigger {
    background: rgba(7, 15, 25, 0.9);
    color: #edf6ff;
    border-color: rgba(95, 149, 190, 0.2);
  }

  html[data-theme='dark'] .home-sidebar__toggle-bar {
    background: #edf6ff;
  }

  html[data-theme='dark'] .fluxo-preview-frame {
    box-shadow: 0 26px 52px rgba(0, 0, 0, 0.24);
  }

  html[data-theme='dark'] .fluxo-preview-link {
    background: rgba(4, 10, 18, 0.48);
  }

  html[data-theme='dark'] .fluxo-preview-link:hover,
  html[data-theme='dark'] .fluxo-preview-link:focus-visible {
    background: rgba(4, 10, 18, 0.62);
  }

  html[data-theme='dark'] .fluxo-preview-link__chip {
    background: rgba(10, 20, 32, 0.92);
    border-color: rgba(122, 191, 244, 0.24);
    color: #edf6ff;
  }

  html[data-theme='dark'] .fluxo-preview-link__chip::after {
    color: #8fd4ff;
  }

  html[data-theme='dark'] .home-sidebar__spotlight,
  html[data-theme='dark'] .home-sidebar__link {
    background: rgba(12, 27, 43, 0.72);
    border-color: rgba(88, 153, 194, 0.14);
  }

  html[data-theme='dark'] .home-sidebar__spotlight:hover,
  html[data-theme='dark'] .home-sidebar__link:hover {
    border-color: rgba(102, 183, 236, 0.24);
    background: rgba(14, 31, 49, 0.92);
  }

  html[data-theme='dark'] .home-sidebar__spotlight-icon,
  html[data-theme='dark'] .home-sidebar__icon {
    background: rgba(0, 133, 202, 0.14);
    border-color: rgba(88, 153, 194, 0.16);
  }

  html[data-theme='dark'] .home-sidebar__backdrop {
    background: rgba(1, 8, 14, 0.6);
  }

  html[data-theme='dark'] .home-sidebar-tooltip {
    background: rgba(8, 22, 35, 0.98);
    border-color: rgba(95, 149, 190, 0.2);
    box-shadow: 0 22px 42px rgba(0, 0, 0, 0.28);
  }

  html[data-theme='dark'] .home-sidebar-tooltip__title {
    color: #edf6ff;
  }

  html[data-theme='dark'] .home-sidebar-tooltip__meta {
    color: #9eb2c8;
  }

  html[data-theme='dark'] .guide-index,
  html[data-theme='dark'] .fluxo-section {
    background: transparent;
  }

  html[data-theme='dark'] .index-group,
  html[data-theme='dark'] .index-spotlight,
  html[data-theme='dark'] .mat-card,
  html[data-theme='dark'] .info-card {
    background: rgba(9, 20, 33, 0.88);
    border-color: rgba(88, 153, 194, 0.18);
    box-shadow: 0 22px 48px rgba(0, 0, 0, 0.22);
  }

  html[data-theme='dark'] .index-spotlight:hover,
  html[data-theme='dark'] .mat-card:hover,
  html[data-theme='dark'] .info-card:hover {
    border-color: rgba(102, 183, 236, 0.28);
    box-shadow: 0 26px 52px rgba(0, 0, 0, 0.28);
  }

  html[data-theme='dark'] .index-link {
    background: rgba(12, 27, 43, 0.78);
    border-color: rgba(88, 153, 194, 0.14);
  }

  html[data-theme='dark'] .index-link:hover {
    background: rgba(16, 36, 56, 0.94);
    border-color: rgba(102, 183, 236, 0.24);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.24);
  }

  html[data-theme='dark'] .index-spotlight-tag,
  html[data-theme='dark'] .mat-tag {
    color: #8fd4ff;
  }

  html[data-theme='dark'] .index-spotlight-tag,
  html[data-theme='dark'] .mat-tag {
    background: rgba(0, 133, 202, 0.14);
  }

  html[data-theme='dark'] .hero-float-card {
    background: rgba(12, 25, 38, 0.96);
    border-color: rgba(88, 153, 194, 0.16);
    border-top-color: var(--hero-card-accent);
    box-shadow: 0 28px 60px rgba(0, 0, 0, 0.3);
  }

  html[data-theme='dark'] .hero-float-card:hover {
    border-color: rgba(111, 196, 245, 0.26);
    box-shadow: 0 34px 70px rgba(0, 0, 0, 0.34);
  }

  html[data-theme='dark'] .hero-float-kicker,
  html[data-theme='dark'] .hero-float-link {
    color: #8fd4ff;
  }

  html[data-theme='dark'] .hero-float-icon {
    background: rgba(107, 192, 255, 0.12);
    border-color: rgba(107, 192, 255, 0.16);
  }

  html[data-theme='dark'] .hero-float-tag {
    background: rgba(107, 192, 255, 0.12);
    color: #dff2ff;
  }

  html[data-theme='dark'] .index-spotlight-icon,
  html[data-theme='dark'] .mat-icon {
    background: rgba(0, 133, 202, 0.14);
  }

  html[data-theme='dark'] .materials-grid .mat-card:not(.featured) .mat-link,
  html[data-theme='dark'] .index-group-title,
  html[data-theme='dark'] .index-spotlight-kicker,
  html[data-theme='dark'] .section-label,
  html[data-theme='dark'] .hero-sub strong {
    color: #8fd4ff;
  }

  html[data-theme='dark'] .index-spotlight-icon {
    border-color: rgba(88, 153, 194, 0.18);
    background: rgba(14, 31, 49, 0.96);
  }

  html[data-theme='dark'] .index-spotlight-cta {
    background: rgba(0, 133, 202, 0.18);
    color: #edf6ff;
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.22);
  }

  html[data-theme='dark'] .index-spotlight:hover .index-spotlight-cta {
    background: rgba(0, 133, 202, 0.28);
  }

  html[data-theme='dark'] .features-section {
    background: linear-gradient(180deg, #07111c 0%, #0c1928 100%);
  }

  html[data-theme='dark'] .feature-card {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(108, 184, 235, 0.08);
  }

  html[data-theme='dark'] .feature-card:hover {
    background: rgba(255, 255, 255, 0.06);
  }

  html[data-theme='dark'] .visitor-route {
    border-color: rgba(127, 181, 255, 0.16);
    background: rgba(9, 21, 34, 0.76);
    box-shadow: inset 0 1px 0 rgba(127, 181, 255, 0.04);
  }

  html[data-theme='dark'] .visitor-route__kicker {
    color: rgba(169, 212, 255, 0.72);
  }

  html[data-theme='dark'] .visitor-route__desc {
    color: rgba(214, 230, 247, 0.7);
  }

  html[data-theme='dark'] .visitor-route__step {
    border-color: rgba(127, 181, 255, 0.12);
    background: rgba(255, 255, 255, 0.03);
  }

  html[data-theme='dark'] .visitor-route__step:hover,
  html[data-theme='dark'] .visitor-route__step:focus-visible {
    border-color: rgba(127, 181, 255, 0.22);
    background: rgba(127, 181, 255, 0.08);
  }

  html[data-theme='dark'] .visitor-route__step-num {
    border-color: rgba(127, 181, 255, 0.18);
    background: rgba(127, 181, 255, 0.1);
  }

  html[data-theme='dark'] .visitor-route__step-copy small {
    color: rgba(214, 230, 247, 0.7);
  }

  html[data-theme='dark'] .map-section {
    background: linear-gradient(135deg, #07111c 0%, #0d2134 100%);
  }

  html[data-theme='dark'] .map-visual {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.08);
  }

  html[data-theme='dark'] .ieee-section {
    background: rgba(9, 20, 33, 0.68);
    border-top-color: rgba(88, 153, 194, 0.16);
    border-bottom-color: rgba(88, 153, 194, 0.16);
  }

  html[data-theme='dark'] .ieee-divider {
    background: rgba(88, 153, 194, 0.2);
  }

  html[data-theme='dark'] .cta-section {
    background: linear-gradient(135deg, #0a4f7e 0%, #073a5d 100%);
  }

  html[data-theme='dark'] footer {
    background: #040c15;
  }

  html[data-theme='dark'] .footer-sub,
  html[data-theme='dark'] .footer-links a,
  html[data-theme='dark'] .footer-copy {
    color: rgba(230, 241, 252, 0.52);
  }

  html[data-theme='dark'] .theme-toggle {
    background: rgba(7, 15, 25, 0.9);
    color: #ecf5ff;
    border-color: rgba(95, 149, 190, 0.2);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.26);
  }

  @media (max-width: 640px) {
    .home-intro__mark-wrap {
      width: min(34vw, 120px);
      min-width: 84px;
    }

    .home-intro__label {
      font-size: 10px;
      letter-spacing: 1.5px;
    }

    .theme-toggle {
      right: 12px;
      bottom: 12px;
      min-height: 44px;
      padding: 0 12px 0 10px;
      font-size: 12px;
    }

    .theme-toggle__icon {
      width: 18px;
      height: 18px;
    }
  }

  @media (min-width: 721px) {
    nav {
      height: 72px;
      padding: 0 44px;
      grid-template-columns: minmax(max-content, 1fr) minmax(360px, 640px) minmax(max-content, 1fr);
    }

    .nav-logo-badge {
      width: 36px;
      height: 44px;
    }

    .nav-logo-text {
      font-size: 20px;
    }

    .nav-search__input {
      min-height: 46px;
      padding: 0 88px 0 48px;
      font-size: 14px;
    }

    .nav-search__clear {
      min-height: 34px;
      padding: 0 12px;
      font-size: 11px;
    }

    .nav-links {
      gap: 20px;
    }

    .nav-links a,
    .nav-links button {
      font-size: 12px;
    }

    .nav-links .theme-toggle {
      min-height: 36px;
      padding: 0 10px 0 8px;
      font-size: 11px;
    }

    .nav-cta {
      padding: 7px 18px;
    }

    .home-sidebar {
      width: 320px;
    }

    .home-sidebar__panel {
      padding: 18px 16px 16px;
    }

    .home-sidebar__title {
      font-size: 22px;
    }

    .hero {
      min-height: calc(100vh - 24px);
      padding: 88px 40px 68px;
    }

    .hero-content {
      width: min(100%, 640px);
    }

    .hero-tag {
      margin-bottom: 24px;
      padding: 5px 14px;
      font-size: 10px;
    }

    .hero-title {
      font-size: clamp(56px, 9vw, 96px);
      letter-spacing: -4px;
    }

    .hero-sub {
      max-width: 620px;
      margin-top: 24px;
      font-size: 17px;
    }

    .hero-buttons {
      gap: 14px;
      margin-top: 34px;
    }

    .btn-primary,
    .btn-secondary,
    .btn-white,
    .btn-outline-white {
      padding: 14px 30px;
      font-size: 15px;
    }

    .hero-float {
      width: 248px;
    }

    .hero-float--right {
      right: 32px;
      width: 216px;
    }

    .hero-float-card {
      padding: 14px 14px 12px;
    }

    .hero-float-card--featured {
      min-height: 176px;
      padding: 16px 16px 14px;
    }

    .hero-float-title {
      font-size: 18px;
    }

    .hero-float-card--featured .hero-float-title {
      font-size: 22px;
    }

    .hero-float-desc {
      font-size: 12px;
    }

    section {
      padding: 80px 40px;
    }

    .guide-index-inner,
    .features-inner,
    .fluxo-header-outer,
    .fluxo-embed,
    .map-inner,
    .ieee-inner {
      padding-left: 40px;
      padding-right: 40px;
    }

    .section-title {
      font-size: clamp(34px, 4.4vw, 56px);
    }

    .section-desc,
    .cta-desc {
      max-width: 560px;
      font-size: 17px;
    }

    .index-spotlight {
      padding: 24px 26px;
    }

    .index-spotlight-title {
      font-size: clamp(23px, 2.7vw, 28px);
    }

    .index-spotlight-desc,
    .visitor-route__desc,
    .feature-desc,
    .mat-desc,
    .ieee-text p {
      font-size: 15px;
    }

    .features-grid,
    .materials-grid,
    .info-cards {
      margin-top: 52px;
    }

    .feature-card {
      padding: 38px 32px;
    }

    .feature-title,
    .mat-title {
      font-size: 22px;
    }

    .materials-grid {
      gap: 20px;
    }

    .mat-card {
      padding: 34px;
    }

    .ieee-section {
      padding: 68px 0;
    }

    .cta-section {
      padding: 80px 40px;
    }

    .cta-title {
      font-size: clamp(36px, 4.8vw, 60px);
    }

    footer {
      padding: 40px;
    }
  }