/* ── Beta section — "Chart House" plates (light) ── */
    .beta-prelude {
      background: var(--bg);
      color: var(--text);
      text-align: center;
      padding: 96px 28px 56px;
      position: relative;
      overflow: hidden;
    }

    /* subtle depth rings behind the prelude */
    .beta-prelude::before {
      content: '';
      position: absolute;
      inset: 0;
      pointer-events: none;
      opacity: 0.35;
      background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='900' height='460' viewBox='0 0 900 460'><g fill='none' stroke='%239AADBD' stroke-width='0.6'><ellipse cx='450' cy='230' rx='120' ry='35'/><ellipse cx='450' cy='230' rx='210' ry='62'/><ellipse cx='450' cy='230' rx='310' ry='92'/><ellipse cx='450' cy='230' rx='420' ry='128'/><ellipse cx='450' cy='230' rx='540' ry='168'/></g></svg>");
      background-repeat: no-repeat;
      background-position: center;
      background-size: 1100px auto;
    }

    .beta-prelude::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 26px;
      transform: translateX(-50%);
      width: 56px;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(26,95,166,0.4), transparent);
    }

    .beta-prelude > * { position: relative; z-index: 1; }

    .beta-prelude .beta-hailer {
      font-family: var(--sans);
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 3.6px;
      text-transform: uppercase;
      color: var(--accent);
      margin-bottom: 20px;
      display: inline-flex;
      align-items: center;
      gap: 12px;
    }
    .beta-prelude .beta-hailer::before,
    .beta-prelude .beta-hailer::after {
      content: '';
      width: 22px;
      height: 1px;
      background: currentColor;
      opacity: 0.5;
    }

    .beta-prelude h2 {
      font-family: var(--serif);
      font-style: italic;
      font-weight: 400;
      font-size: clamp(32px, 4.5vw, 52px);
      line-height: 1.06;
      color: var(--text-heading);
      max-width: 820px;
      margin: 0 auto 20px;
    }

    .beta-prelude .beta-lede {
      font-size: 16px;
      line-height: 1.75;
      max-width: 600px;
      margin: 0 auto 8px;
      color: var(--text);
    }

    .beta-prelude .beta-sub {
      font-size: 14px;
      line-height: 1.7;
      color: var(--text-dim);
      max-width: 520px;
      margin: 0 auto;
      letter-spacing: 0.2px;
    }

    /* Plate shell — contained on light background */
    .beta-shell {
      position: relative;
      width: 100%;
      background: var(--bg);
      padding: 8px 28px 64px;
    }

    .beta-plates {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 22px;
      position: relative;
      max-width: 1180px;
      margin: 0 auto;
    }

    .beta-plates > .beta-divider { display: none; }

    .beta-plate {
      position: relative;
      min-height: 380px;
      padding: 30px 32px 32px;
      border-radius: 16px;
      display: flex;
      flex-direction: column;
      overflow: hidden;
      transition: transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1),
                  box-shadow 0.4s ease,
                  filter 0.4s ease;
      isolation: isolate;
    }

    .beta-plate--android {
      box-shadow:
        0 1px 0 rgba(255,255,255,0.6) inset,
        0 12px 36px -12px rgba(14,23,35,0.25),
        0 0 0 1px rgba(14,23,35,0.06);
    }
    .beta-plate--ios {
      box-shadow:
        0 1px 0 rgba(255,255,255,0.1) inset,
        0 14px 38px -12px rgba(3,19,42,0.45),
        0 0 0 1px rgba(3,19,42,0.15);
    }

    /* Android — "Sea Glass" */
    .beta-plate--android {
      background:
        radial-gradient(130% 100% at 18% -10%, #F6FAF8 0%, #E0ECE6 44%, #BDCFC7 100%);
      color: #0F1D17;
    }

    /* iOS — "Deep Harbour" */
    .beta-plate--ios {
      background:
        radial-gradient(120% 110% at 85% -10%, #2E5E96 0%, #103259 42%, #061A36 100%);
      color: #EAF2FA;
    }

    /* Contour pattern — specific per plate */
    .beta-plate::before {
      content: '';
      position: absolute;
      inset: 0;
      pointer-events: none;
      z-index: 0;
      opacity: 0.42;
      mix-blend-mode: multiply;
      background-repeat: no-repeat;
      background-position: center;
      background-size: cover;
    }

    .beta-plate--android::before {
      background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='760' height='760' viewBox='0 0 760 760'><g fill='none' stroke='%23778694' stroke-width='0.7' stroke-linecap='round'><path d='M -40,120 Q 140,80 290,130 T 580,140 T 820,130'/><path d='M -40,200 Q 140,160 290,210 T 580,220 T 820,210'/><path d='M -40,280 Q 140,240 290,290 T 580,300 T 820,290'/><path d='M -40,360 Q 140,320 290,370 T 580,380 T 820,370'/><path d='M -40,440 Q 140,400 290,450 T 580,460 T 820,450'/><path d='M -40,520 Q 140,480 290,530 T 580,540 T 820,530'/><path d='M -40,600 Q 140,560 290,610 T 580,620 T 820,610'/><path d='M -40,680 Q 140,640 290,690 T 580,700 T 820,690'/></g></svg>");
    }

    .beta-plate--ios::before {
      mix-blend-mode: screen;
      opacity: 0.3;
      background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='760' height='760' viewBox='0 0 760 760'><g fill='none' stroke='%2389B5DF' stroke-width='0.6' stroke-linecap='round'><path d='M -40,140 Q 140,100 290,150 T 580,160 T 820,150'/><path d='M -40,220 Q 140,180 290,230 T 580,240 T 820,230'/><path d='M -40,300 Q 140,260 290,310 T 580,320 T 820,310'/><path d='M -40,380 Q 140,340 290,390 T 580,400 T 820,390'/><path d='M -40,460 Q 140,420 290,470 T 580,480 T 820,470'/><path d='M -40,540 Q 140,500 290,550 T 580,560 T 820,550'/><path d='M -40,620 Q 140,580 290,630 T 580,640 T 820,630'/></g></svg>");
    }

    /* Glow halo behind the mark */
    .beta-plate::after {
      content: '';
      position: absolute;
      z-index: 0;
      pointer-events: none;
      border-radius: 50%;
      opacity: 0.85;
      filter: blur(2px);
    }
    .beta-plate--android::after {
      width: 360px; height: 360px;
      top: -60px; right: -80px;
      background: radial-gradient(closest-side, rgba(46,139,92,0.18), transparent 72%);
    }
    .beta-plate--ios::after {
      width: 440px; height: 440px;
      top: -80px; right: -60px;
      background: radial-gradient(closest-side, rgba(138,211,255,0.34), transparent 72%);
    }

    /* Corner rivets */
    .plate-rivets {
      position: absolute;
      inset: 16px;
      z-index: 1;
      pointer-events: none;
    }
    .plate-rivets i {
      position: absolute;
      width: 5px;
      height: 5px;
      border-radius: 50%;
    }
    .plate-rivets i:nth-child(1) { top: 0; left: 0; }
    .plate-rivets i:nth-child(2) { top: 0; right: 0; }
    .plate-rivets i:nth-child(3) { bottom: 0; left: 0; }
    .plate-rivets i:nth-child(4) { bottom: 0; right: 0; }
    .beta-plate--android .plate-rivets i {
      background: #0E1723;
      opacity: 0.22;
      box-shadow: 0 1px 0 rgba(255,255,255,0.45);
    }
    .beta-plate--ios .plate-rivets i {
      background: #EAF2FA;
      opacity: 0.38;
      box-shadow: 0 1px 0 rgba(0,0,0,0.45);
    }

    /* Content layering */
    .plate-head,
    .plate-body,
    .plate-foot {
      position: relative;
      z-index: 2;
    }

    /* Top metadata strip */
    .plate-head {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-family: var(--sans);
      font-size: 10px;
      font-weight: 600;
      letter-spacing: 2.2px;
      text-transform: uppercase;
      margin-bottom: 22px;
    }
    .beta-plate--android .plate-head { color: rgba(14,23,35,0.55); }
    .beta-plate--ios .plate-head { color: rgba(234,242,250,0.55); }

    .plate-channel {
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }
    .plate-channel::before {
      content: '';
      width: 22px;
      height: 1px;
      background: currentColor;
      opacity: 0.45;
    }

    .plate-stamp {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      padding: 5px 11px 5px 10px;
      border-radius: 2px;
      font-size: 10px;
      letter-spacing: 2px;
      font-weight: 700;
    }
    .beta-plate--android .plate-stamp {
      border: 1px solid rgba(14,23,35,0.22);
      color: rgba(14,23,35,0.72);
      background: rgba(255,255,255,0.3);
    }
    .beta-plate--ios .plate-stamp {
      border: 1px solid rgba(234,242,250,0.32);
      color: rgba(234,242,250,0.82);
      background: rgba(234,242,250,0.04);
    }
    .plate-stamp-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      animation: stampPulse 2.3s ease-in-out infinite;
    }
    .beta-plate--android .plate-stamp-dot { background: #2E8B5C; box-shadow: 0 0 0 3px rgba(46,139,92,0.18); }
    .beta-plate--ios .plate-stamp-dot { background: #F5B54A; box-shadow: 0 0 0 3px rgba(245,181,74,0.24); }

    @keyframes stampPulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.55; transform: scale(0.82); }
    }

    /* Title row — mark + title inline, compact */
    .plate-headline {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 10px;
    }

    .plate-mark {
      width: 44px;
      height: 44px;
      display: block;
      flex-shrink: 0;
    }
    .plate-mark--android {
      color: #2E8B5C;
      filter: drop-shadow(0 4px 12px rgba(46,139,92,0.3));
    }
    .plate-mark--ios {
      color: #FFFFFF;
      filter: drop-shadow(0 6px 16px rgba(138,211,255,0.3));
    }

    /* Body */
    .plate-body {
      display: flex;
      flex-direction: column;
      flex: 1;
      max-width: 460px;
    }

    .plate-title {
      font-family: var(--serif);
      font-style: italic;
      font-size: clamp(38px, 4vw, 52px);
      font-weight: 400;
      line-height: 0.98;
      letter-spacing: -0.015em;
    }

    .plate-lede {
      font-size: 14px;
      line-height: 1.65;
      margin-bottom: 16px;
      opacity: 0.85;
      max-width: 440px;
    }

    .plate-form {
      display: grid;
      gap: 8px;
      max-width: 440px;
    }

    .plate-input {
      padding: 11px 14px;
      border-radius: 7px;
      font-size: 14px;
      font-family: inherit;
      outline: none;
      transition: all 0.2s ease;
      width: 100%;
    }

    .beta-plate--android .plate-input {
      background: #FFFFFF;
      border: 1px solid rgba(46,139,92,0.22);
      color: #0F1D17;
      box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.9),
        0 1px 2px rgba(15,29,23,0.04);
    }
    .beta-plate--android .plate-input::placeholder { color: rgba(15,29,23,0.42); }
    .beta-plate--android .plate-input:focus {
      border-color: #2E8B5C;
      box-shadow:
        0 0 0 3px rgba(46,139,92,0.18),
        inset 0 1px 0 rgba(255,255,255,0.9);
    }

    .beta-plate--ios .plate-input {
      background: rgba(255,255,255,0.12);
      border: 1px solid rgba(234,242,250,0.32);
      color: #EAF2FA;
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.08),
        0 1px 2px rgba(0,0,0,0.15);
    }
    .beta-plate--ios .plate-input::placeholder { color: rgba(234,242,250,0.6); }
    .beta-plate--ios .plate-input:focus {
      background: rgba(255,255,255,0.18);
      border-color: #8AD3FF;
      box-shadow:
        0 0 0 3px rgba(138,211,255,0.24),
        inset 0 1px 0 rgba(255,255,255,0.12);
    }

    .plate-cta {
      padding: 12px 18px;
      margin-top: 4px;
      width: 100%;
      border: none;
      border-radius: 7px;
      font-size: 14px;
      font-weight: 700;
      font-family: inherit;
      cursor: pointer;
      letter-spacing: 0.3px;
      text-decoration: none;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
      position: relative;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
    }
    .plate-cta .arrow {
      display: inline-block;
      transition: transform 0.2s ease;
    }
    .plate-cta:hover .arrow { transform: translateX(4px); }

    .beta-plate--android .plate-cta {
      background: linear-gradient(135deg, #1F3A2B 0%, #122318 100%);
      color: #F2F8F5;
      box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.1),
        0 4px 14px rgba(15,29,23,0.28);
    }
    .beta-plate--android .plate-cta:hover {
      transform: translateY(-1px);
      background: linear-gradient(135deg, #2E5A43 0%, #1A3024 100%);
      box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.12),
        0 10px 26px rgba(15,29,23,0.34);
    }

    .beta-plate--ios .plate-cta {
      background: linear-gradient(180deg, #FFFFFF 0%, #F2F7FC 100%);
      color: #041835;
      box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.9),
        0 4px 14px rgba(0,0,0,0.35);
    }
    .beta-plate--ios .plate-cta:hover {
      transform: translateY(-1px);
      background: linear-gradient(180deg, #FFFFFF 0%, #E8F1FB 100%);
      box-shadow:
        inset 0 1px 0 rgba(255,255,255,1),
        0 10px 26px rgba(0,0,0,0.45);
    }

    .plate-status {
      font-size: 12.5px;
      line-height: 1.55;
      margin-top: 10px;
      min-height: 0;
      max-width: 440px;
    }
    .beta-plate--android .plate-status { color: #3B4C5B; }
    .beta-plate--ios .plate-status { color: rgba(234,242,250,0.82); }

    .plate-status:empty { display: none; }

    .plate-foot { display: none; }

    /* Hover choreography */
    @media (hover: hover) {
      .beta-plates:hover .beta-plate {
        filter: saturate(0.78) brightness(0.94);
        transform: translateY(2px) scale(0.992);
      }
      .beta-plates:hover .beta-plate:hover {
        filter: none;
        transform: translateY(-3px) scale(1.008);
      }
      .beta-plate--android:hover {
        box-shadow:
          0 1px 0 rgba(255,255,255,0.06) inset,
          0 28px 64px -18px rgba(0,0,0,0.6),
          0 2px 0 rgba(255,255,255,0.04);
      }
      .beta-plate--ios:hover {
        box-shadow:
          0 1px 0 rgba(255,255,255,0.14) inset,
          0 28px 64px -18px rgba(0,0,0,0.8),
          0 2px 0 rgba(255,255,255,0.06);
      }
    }

    /* Coda — legal fine print */
    .beta-coda {
      background: var(--bg);
      color: var(--text-dim);
      text-align: center;
      padding: 28px 28px 72px;
    }
    .beta-coda p {
      font-size: 12px;
      line-height: 1.8;
      max-width: 580px;
      margin: 0 auto;
    }
    .beta-coda a { color: var(--accent); }

    /* ── Footer ──────────────────────────────────── */
    footer {
      max-width: 1060px;
      margin: 0 auto;
      padding: 36px 28px 44px;
      border-top: 1px solid var(--border);
    }

    .footer-top {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-bottom: 28px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .footer-brand img { width: 24px; height: 24px; border-radius: 6px; }

    .footer-brand span {
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 2px;
      color: var(--text-dim);
    }

    .footer-links { display: flex; gap: 20px; }

    .footer-links a {
      color: var(--text-dim);
      text-decoration: none;
      font-size: 13px;
      transition: color 0.2s;
    }

    .footer-links a:hover { color: var(--text-heading); }

    .footer-attribution {
      font-size: 11px;
      color: #6B7280;
      line-height: 1.8;
      max-width: 700px;
    }

    /* ── Responsive ──────────────────────────────── */
    @media (max-width: 768px) {
      nav {
        padding: 10px 20px;
        min-height: 96px;
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
      }
      .nav-brand {
        align-self: flex-start;
      }
      .nav-brand span {
        letter-spacing: 2px;
      }
      .nav-links {
        width: 100%;
        gap: 10px;
        flex-wrap: wrap;
        justify-content: space-between;
      }
      .nav-links a {
        font-size: 13px;
        padding: 8px 0;
        white-space: nowrap;
      }
      .nav-links li:nth-child(4) {
        display: none;
      }
      .nav-links a.nav-cta {
        display: none;
      }
      .hero { padding: 120px 20px 60px; }
      section, .section-alt { padding: 60px 20px; }
      section[id],
      .section-alt[id] {
        scroll-margin-top: 136px;
      }
      .feature-split { grid-template-columns: 1fr; gap: 28px; }
      .feature-split.reverse { direction: ltr; }
      .features-grid { grid-template-columns: 1fr; }
      .platform-showcase { grid-template-columns: 1fr; }
      .monitor-frame {
        padding: 7px;
        border-radius: 8px;
      }
      .monitor-frame--compact {
        padding: 9px 8px 24px;
        margin-bottom: 34px;
      }
      .monitor-brand,
      .monitor-controls,
      .monitor-corner,
      .monitor-hinge {
        display: none;
      }
      .monitor-frame::before,
      .monitor-frame::after {
        display: none;
      }
      .sediment-fishing {
        padding: 24px 20px 60px;
      }
      .sediment-layout {
        grid-template-columns: 1fr;
        gap: 26px;
      }
      .platform-card {
        grid-template-columns: 1fr;
      }
      .platform-copy {
        padding: 24px 22px;
      }
      .desktop-screens,
      .mobile-stack {
        border-left: none;
        border-top: 1px solid var(--border);
      }
      .desktop-screens { gap: 8px; }
      .mobile-stack { gap: 8px; }
      .access-grid {
        grid-template-columns: 1fr;
        padding: 8px 20px 56px;
      }
      .device-grid {
        grid-template-columns: 1fr;
        padding: 8px 20px 56px;
      }
      .home-only .hero {
        display: block;
        padding: 132px 42px 28px 18px;
        text-align: left;
        width: 100%;
        max-width: 100vw;
        overflow: hidden;
      }
      .hero-copy {
        width: auto;
        max-width: none;
      }
      .home-only .hero h1 {
        max-width: none;
        font-size: clamp(31px, 9.4vw, 38px);
        overflow-wrap: break-word;
      }
      .home-only .hero-sub {
        font-size: 16px;
        line-height: 1.6;
        max-width: none;
      }
      .home-only .hero-detail {
        font-size: 13px;
        max-width: none;
      }
      .hero-note,
      .hero-proof {
        max-width: none;
      }
      .hero-actions {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        max-width: none;
      }
      .hero-action {
        width: 100%;
      }
      .hero-proof {
        grid-template-columns: 1fr;
      }
      .hero-proof span {
        min-height: auto;
      }
      .hero-proof span + span {
        border-left: none;
        border-top: 1px solid rgba(6, 26, 54, 0.09);
      }
      .hero-visual {
        min-height: 320px;
        margin-top: 26px;
      }
      .hero-device-stage {
        min-height: 320px;
        width: 100%;
      }
      .hero-monitor {
        width: 92%;
        right: 0;
      }
      .hero-monitor .monitor-frame {
        padding: 8px 7px 22px;
      }
      .hero-tablet {
        width: 58%;
        left: 0;
        bottom: 5%;
      }
      .hero-phone {
        width: 25%;
        right: 4%;
        bottom: 3%;
      }
      .home-only .device-grid {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 0 18px 24px;
        margin-top: 2px;
      }
      .home-only .device-card {
        min-height: auto;
        grid-template-columns: 88px minmax(0, 1fr);
        column-gap: 16px;
        padding: 18px 16px;
      }
      .home-only .device-card .choice-previews {
        height: 92px;
      }
      .home-only .device-card h2,
      .home-only .device-card h3 {
        font-size: 19px;
        text-align: left;
        margin: 0 0 5px;
      }
      .home-only .device-card p {
        font-size: 13px;
      }
      .device-card .phone-frame,
      .device-card .tablet-frame,
      .device-card .monitor-frame {
        transform: none;
        margin-bottom: 0;
      }
      .home-only .device-card .phone-frame {
        width: 52px;
        padding: 2px;
        border-radius: 11px;
      }
      .home-only .device-card .phone-frame::before {
        top: 4px;
        width: 14px;
        height: 3px;
      }
      .home-only .device-card .phone-screen {
        aspect-ratio: 1080 / 2340;
        border-radius: 8px;
      }
      .home-only .device-card .tablet-frame {
        width: 92px;
        padding: 3px;
        border-radius: 12px;
      }
      .home-only .device-card .tablet-frame::before {
        top: 2px;
        width: 2px;
        height: 2px;
      }
      .home-only .device-card .tablet-screen {
        border-radius: 8px;
      }
      .home-only .device-card .monitor-frame {
        max-width: 96px;
        padding: 7px 7px 20px;
        margin-bottom: 10px;
      }
      .device-card .monitor-frame {
        margin-bottom: 34px;
      }
      .home-only .device-card .monitor-frame {
        margin-bottom: 14px;
      }
      .decision-panel {
        margin: 6px auto 52px;
        padding: 0 18px;
      }
      .decision-card {
        padding: 22px;
        border-radius: 10px;
      }
      .decision-grid {
        grid-template-columns: 1fr;
        gap: 22px;
      }
      .decision-actions {
        flex-direction: column;
      }
      .decision-actions .hero-action {
        width: 100%;
      }
      footer { padding: 28px 20px 36px; }
      .footer-top { flex-direction: column; }
      .beta-prelude { padding: 72px 22px 52px; }
      .beta-shell { padding: 8px 16px 56px; }
      .beta-plates { grid-template-columns: 1fr; gap: 16px; }
      .beta-plate {
        min-height: auto;
        padding: 36px 28px 40px;
        border-radius: 14px;
      }
      .beta-coda { padding: 28px 22px 56px; }
      .plate-head { margin-bottom: 36px; flex-wrap: wrap; gap: 12px; }
      .plate-mark { width: 72px; height: 72px; margin-bottom: 22px; }
      .plate-title { font-size: clamp(46px, 12vw, 62px); }
      .plate-foot { margin-top: 26px; }
    }