:root {
      --bg: #0b0b0d;
      --marrs: #018B8D;
      --marrs-bright: #02b0b3;
      --text: #f4fafa;
      --font: "Nunito", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; background: #000; }
    body {
      color: var(--text); font-family: var(--font); background: #000;
      -webkit-font-smoothing: antialiased; overflow-x: hidden;
    }
    a { color: inherit; text-decoration: none; }
    button { font: inherit; border: 0; background: none; color: inherit; cursor: pointer; }

    .preview-tag {
      position: fixed; top: 10px; left: 50%; transform: translateX(-50%);
      z-index: 70; font-size: 10px; letter-spacing: .04em;
      color: rgba(244,250,250,.22); pointer-events: none; white-space: nowrap;
    }

    /* NAV — Open Move style: expands into glass pill when scrolled */
    .nav {
      position: fixed; inset: 0 0 auto 0; z-index: 50;
      display: grid; grid-template-columns: 1fr auto 1fr;
      align-items: center; gap: 12px;
      padding: 16px clamp(16px, 3vw, 36px);
      pointer-events: none;
    }
    .nav > * { pointer-events: auto; }
    .brand {
      display: inline-flex; align-items: center; gap: 10px; justify-self: start;
    }
    .brand img {
      width: 28px; height: 28px; border-radius: 8px; object-fit: cover;
      box-shadow: 0 0 0 1px rgba(1,139,141,.35);
    }
    .brand .word {
      font-weight: 800; letter-spacing: -.02em; font-size: 15px;
      opacity: 0; max-width: 0; overflow: hidden; white-space: nowrap;
      transition: opacity .25s, max-width .25s;
    }
    .nav.scrolled .brand .word { opacity: 1; max-width: 140px; }
    .nav-pill {
      display: none; align-items: center; gap: 22px;
      padding: 10px 22px; border-radius: 999px;
      font-size: 13px; font-weight: 600; color: rgba(255,255,255,.78);
      transition: background .25s, border-color .25s, backdrop-filter .25s, box-shadow .25s;
      border: 1px solid transparent;
    }
    .nav.scrolled .nav-pill {
      background: rgba(12,16,18,.72);
      backdrop-filter: blur(18px);
      border-color: rgba(255,255,255,.08);
      box-shadow: 0 10px 40px rgba(0,0,0,.35);
    }
    .nav-pill a:hover { color: #fff; }
    .nav-right { justify-self: end; display: flex; align-items: center; gap: 10px; }
    .nav-ghost { font-size: 12px; font-weight: 700; color: rgba(255,255,255,.55); padding: 8px 10px; }
    .nav-cta {
      display: inline-flex; align-items: center; justify-content: center;
      min-height: 40px; padding: 0 18px; border-radius: 999px;
      background: #fff; color: #041012; font-size: 13px; font-weight: 800;
      transition: transform .2s;
    }
    .nav-cta:hover { transform: scale(1.04); }
    @media (min-width: 960px) { .nav-pill { display: flex; } }

    /* HERO sticky */
    .hero-track { position: relative; height: 220vh; background: #000; }
    .hero-sticky {
      position: sticky; top: 0; height: 100svh;
      display: grid; place-items: center; overflow: hidden;
    }
    .hero-media {
      position: absolute; inset: 0; z-index: 1; overflow: hidden;
      transform-origin: center; will-change: transform, filter, border-radius;
      box-shadow: 0 0 100px rgba(0,0,0,.85);
      border: 1px solid rgba(255,255,255,.05); background: #000;
    }
    .hero-media img {
      width: 100%; height: 100%; object-fit: cover; transform: scale(1.06);
      filter: saturate(1.2) brightness(.92) contrast(1.05);
    }

    .hero-media img.neon-hero {
      filter: saturate(1.15) brightness(.95) contrast(1.05);
      animation: seaDrift 18s ease-in-out infinite alternate;
      transform-origin: 55% 40%;
    }
    @keyframes seaDrift {
      0% { transform: scale(1.08) translate3d(-1.2%, 0.6%, 0); }
      50% { transform: scale(1.12) translate3d(1.4%, -0.8%, 0); }
      100% { transform: scale(1.1) translate3d(-0.6%, 1.1%, 0); }
    }
    .hero-caustic {
      position: absolute; inset: -10%; z-index: 1; pointer-events: none;
      background:
        radial-gradient(ellipse 40% 28% at 30% 35%, rgba(1,139,141,.22), transparent 60%),
        radial-gradient(ellipse 35% 24% at 70% 55%, rgba(2,176,179,.16), transparent 62%),
        radial-gradient(ellipse 50% 30% at 50% 80%, rgba(255,255,255,.05), transparent 70%);
      mix-blend-mode: screen;
      opacity: .55;
      animation: causticMove 10s ease-in-out infinite alternate;
    }
    @keyframes causticMove {
      0% { transform: translate3d(-2%, -1%, 0) scale(1); opacity: .4; }
      100% { transform: translate3d(3%, 2%, 0) scale(1.08); opacity: .7; }
    }
    .hero-foam {
      position: absolute; inset: 0; z-index: 1; pointer-events: none;
      background:
        linear-gradient(115deg, transparent 35%, rgba(180,255,255,.07) 48%, transparent 62%),
        linear-gradient(250deg, transparent 40%, rgba(1,139,141,.1) 55%, transparent 70%);
      background-size: 220% 220%;
      animation: foamSweep 7s linear infinite;
      mix-blend-mode: soft-light;
    }
    @keyframes foamSweep {
      0% { background-position: 0% 40%, 100% 60%; }
      100% { background-position: 100% 60%, 0% 40%; }
    }
    .hero-glow-pulse {
      position: absolute; left: 50%; top: 46%; z-index: 1; pointer-events: none;
      width: min(70vw, 720px); height: min(28vw, 220px);
      transform: translate(-50%, -50%);
      background: radial-gradient(ellipse at center, rgba(1,139,141,.35) 0%, rgba(1,139,141,.08) 40%, transparent 70%);
      filter: blur(18px);
      animation: neonPulse 3.2s ease-in-out infinite;
      mix-blend-mode: screen;
    }
    @keyframes neonPulse {
      0%, 100% { opacity: .45; transform: translate(-50%, -50%) scale(0.96); }
      50% { opacity: .85; transform: translate(-50%, -50%) scale(1.06); }
    }
    /* image already has brand wordmark — keep HTML title for a11y but invisible on first beat */
    #heroBrand .hero-title {
      opacity: 0;
      height: 0; overflow: hidden; margin: 0; font-size: 0;
    }
    #heroBrand {
      position: absolute;
      left: 0; right: 0;
      /* sit below neon wordmark baked into hero image (was 58% and overlapped) */
      top: clamp(62%, calc(50% + min(16vw, 150px)), 74%);
      display: flex; flex-direction: column; align-items: center;
      pointer-events: none;
      z-index: 3;
    }
    #heroBrand .hero-sub {
      margin-top: 0;
      padding: 8px 18px;
      border-radius: 999px;
      background: rgba(0,0,0,.42);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      font-size: clamp(15px, 2.2vw, 24px);
      color: rgba(255,255,255,.92);
      text-shadow: 0 6px 20px rgba(0,0,0,.7);
      letter-spacing: .14em;
      white-space: nowrap;
    }

    .hero-media::after {
      content: ""; position: absolute; inset: 0; z-index: 2;
      background:
        linear-gradient(180deg, rgba(0,0,0,.18) 0%, rgba(0,8,10,.05) 38%, rgba(0,6,7,.55) 100%),
        radial-gradient(ellipse at center, rgba(1,139,141,.12) 0%, transparent 58%);
      pointer-events: none;
    }
    .hero-layer {
      position: absolute; inset: 0; z-index: 2;
      display: flex; flex-direction: column; align-items: center; justify-content: center;
      text-align: center; padding: 24px; pointer-events: none;
    }
    .hero-title {
      font-size: clamp(64px, 12vw, 148px);
      font-weight: 900; letter-spacing: -.06em; line-height: .9;
      text-shadow: 0 18px 60px rgba(0,0,0,.55);
    }
    .hero-title em {
      font-style: normal;
      background: linear-gradient(120deg, #f2fffe 10%, #9cf0f1 45%, #018B8D 100%);
      -webkit-background-clip: text; background-clip: text; color: transparent;
    }
    .hero-sub {
      margin-top: 22px; font-size: clamp(18px, 3.2vw, 34px);
      font-weight: 400; color: rgba(255,255,255,.82); letter-spacing: .04em;
    }
    .scroll-hint {
      position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
      display: flex; flex-direction: column; align-items: center; gap: 10px;
    }
    .scroll-mouse {
      width: 22px; height: 36px; border-radius: 999px;
      border: 2px solid rgba(255,255,255,.32);
      display: flex; justify-content: center; padding-top: 7px;
    }
    .scroll-mouse i {
      width: 3px; height: 8px; border-radius: 999px; background: rgba(255,255,255,.75);
      animation: wheel 1.6s ease-in-out infinite;
    }
    @keyframes wheel {
      0%,100% { transform: translateY(0); opacity: 1; }
      50% { transform: translateY(10px); opacity: .2; }
    }
    .scroll-hint span {
      font-size: 11px; font-weight: 700; letter-spacing: .22em;
      text-transform: uppercase; color: rgba(255,255,255,.42);
    }
    .hero-pitch {
      max-width: 920px; padding: 0 20px;
      opacity: 0; transform: translateY(40px) scale(.94);
    }
    .eyebrow {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 7px 14px; border-radius: 999px;
      border: 1px solid rgba(255,255,255,.18);
      background: rgba(255,255,255,.06); backdrop-filter: blur(10px);
      font-size: 11px; font-weight: 800; letter-spacing: .18em;
      text-transform: uppercase; color: rgba(255,255,255,.78); margin-bottom: 22px;
    }
    .eyebrow::before {
      content: ""; width: 7px; height: 7px; border-radius: 50%;
      background: var(--marrs-bright); box-shadow: 0 0 12px var(--marrs);
    }
    .hero-pitch h2 {
      font-size: clamp(36px, 7vw, 78px);
      font-weight: 800; letter-spacing: -.035em; line-height: 1.05;
      text-shadow: 0 16px 50px rgba(0,0,0,.5);
    }
    .hero-pitch h2 .accent {
      display: block; margin-top: .12em;
      background: linear-gradient(90deg, #7fe3e4, #018B8D 40%, #5ad0ff 70%, #c9f7a8);
      -webkit-background-clip: text; background-clip: text; color: transparent;
    }
    .hero-pitch .lead {
      margin: 18px auto 0; max-width: 640px;
      font-size: clamp(15px, 2vw, 20px); font-weight: 400;
      color: rgba(255,255,255,.68); line-height: 1.7;
    }
    .hero-pitch .actions {
      margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px;
      justify-content: center; pointer-events: auto;
    }
    .btn-primary {
      display: inline-flex; align-items: center; gap: 8px;
      min-height: 48px; padding: 0 24px; border-radius: 999px;
      background: #fff; color: #041012; font-weight: 800; font-size: 14px;
      transition: transform .2s;
    }
    .btn-primary:hover { transform: scale(1.04); }
    .btn-ghost {
      display: inline-flex; align-items: center; gap: 8px;
      min-height: 48px; padding: 0 22px; border-radius: 999px;
      border: 1px solid rgba(255,255,255,.22); color: #fff;
      font-weight: 700; font-size: 14px; background: rgba(255,255,255,.04);
    }

    /* ===== HORIZONTAL SCRUB (openmove form) ===== */
    .hslide-track {
      position: relative; height: 380vh; background: #000;
    }
    .hslide-sticky {
      position: sticky; top: 0; height: 100svh; overflow: hidden;
    }
    .hslide-row {
      display: flex; width: 300vw; height: 100%;
      will-change: transform;
    }
    .hslide {
      position: relative; width: 100vw; height: 100%;
      flex: 0 0 100vw; overflow: hidden;
      display: flex; align-items: flex-end;
      padding: 0 clamp(24px, 6vw, 80px) clamp(72px, 12vh, 120px);
    }
    .hslide .bg {
      position: absolute; inset: 0; z-index: 0;
    }
    .hslide .bg img, .hslide .bg .fallback {
      width: 100%; height: 100%; object-fit: cover;
      transform: scale(1.04);
      filter: brightness(.55) saturate(1.05);
    }
    .hslide .bg::after {
      content: ""; position: absolute; inset: 0;
      background:
        linear-gradient(90deg, rgba(0,0,0,.78) 0%, rgba(0,0,0,.35) 48%, rgba(0,0,0,.25) 100%),
        linear-gradient(180deg, rgba(0,0,0,.2), rgba(0,0,0,.55));
    }
    .hslide .bg .fallback {
      display: block;
      background:
        radial-gradient(ellipse at 70% 40%, rgba(1,139,141,.35), transparent 50%),
        linear-gradient(135deg, #031416 0%, #000 45%, #012224 100%);
    }
    .hslide-1 .bg .fallback {
      background:
        radial-gradient(ellipse at 65% 35%, rgba(30,90,160,.4), transparent 55%),
        linear-gradient(145deg, #02080f, #000 50%, #012018);
    }
    .hslide-2 .bg .fallback {
      background:
        radial-gradient(ellipse at 60% 40%, rgba(1,139,141,.45), transparent 55%),
        linear-gradient(150deg, #021012, #000 48%, #013033);
    }
    .hslide-3 .bg .fallback {
      background:
        radial-gradient(ellipse at 70% 50%, rgba(20,120,180,.4), transparent 55%),
        linear-gradient(160deg, #01080e, #000 50%, #021820);
    }
    .hslide .copy { position: relative; z-index: 1; max-width: 560px; }
    .hslide .tag {
      display: inline-flex; margin-bottom: 18px;
      padding: 6px 12px; border-radius: 999px;
      border: 1px solid rgba(255,255,255,.2);
      background: rgba(255,255,255,.06); backdrop-filter: blur(8px);
      font-size: 12px; font-weight: 800; letter-spacing: .16em;
      text-transform: uppercase; color: rgba(255,255,255,.82);
    }
    .hslide h3 {
      font-size: clamp(36px, 5.5vw, 56px); font-weight: 800;
      letter-spacing: -.03em; line-height: 1.08; margin-bottom: 14px;
      text-shadow: 0 12px 40px rgba(0,0,0,.45);
    }
    .hslide p {
      color: rgba(255,255,255,.72); font-size: clamp(15px, 1.6vw, 18px);
      line-height: 1.7; font-weight: 400; margin-bottom: 22px;
    }
    .hslide .btn-primary { min-height: 44px; font-size: 13px; }
    .hslide-progress {
      position: absolute; left: 50%; bottom: 28px; transform: translateX(-50%);
      z-index: 5; width: min(220px, 40vw); height: 2px;
      background: rgba(255,255,255,.18); border-radius: 999px; overflow: hidden;
    }
    .hslide-progress i {
      display: block; height: 100%; width: 0%;
      background: #fff; border-radius: 999px;
      will-change: width;
    }

    /* stacked mobile fallback for hslide */
    @media (max-width: 767px) {
      .hslide-track { height: auto; }
      .hslide-sticky { position: relative; height: auto; overflow: visible; }
      .hslide-row { width: 100%; flex-direction: column; transform: none !important; }
      .hslide { width: 100%; flex: none; min-height: 100svh; }
      .hslide-progress { display: none; }
    }

    /* sections */
    .section {
      min-height: 100svh; display: flex; align-items: center;
      border-top: 1px solid rgba(255,255,255,.06); background: #000;
      padding: clamp(72px, 10vh, 120px) clamp(20px, 4vw, 56px);
    }
    .section-inner { width: min(1800px, 100%); margin: 0 auto; }
    .sec-top { display: grid; gap: 28px; margin-bottom: 36px; }
    @media (min-width: 960px) {
      .sec-top { grid-template-columns: 1.15fr .75fr; align-items: end; gap: 64px; }
    }
    .mono {
      font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
      font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
      color: rgba(255,255,255,.45); margin-bottom: 14px;
    }
    .sec-top h2 {
      font-size: clamp(28px, 4.2vw, 54px); font-weight: 600;
      letter-spacing: -.03em; line-height: 1.12; white-space: pre-line;
    }
    .sec-top .aside {
      color: rgba(255,255,255,.58); font-size: 15px; line-height: 1.78;
      font-weight: 400; max-width: 460px;
    }

    .model-rows { border-top: 1px solid rgba(255,255,255,.13); }
    .model-row {
      display: grid; gap: 14px; padding: 18px 0;
      border-bottom: 1px solid rgba(255,255,255,.08);
      transition: background .2s;
    }
    .model-row:hover { background: rgba(255,255,255,.02); }
    @media (min-width: 900px) {
      .model-row { grid-template-columns: 220px 1fr; gap: 28px; align-items: baseline; }
    }
    .model-row .idx {
      font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
      font-size: 11px; letter-spacing: .12em; color: rgba(255,255,255,.4);
    }
    .model-row .idx b { color: rgba(255,255,255,.75); font-weight: 700; margin-right: 8px; }
    .model-row .items { display: flex; flex-wrap: wrap; gap: 10px 18px; }
    .model-row .items span {
      font-size: 14px; font-weight: 600; color: rgba(255,255,255,.86);
      display: inline-flex; align-items: center; gap: 8px;
    }
    .dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
    .model-foot {
      margin-top: 18px; display: flex; flex-wrap: wrap; gap: 12px 24px;
      justify-content: space-between; color: rgba(255,255,255,.35);
      font-size: 12px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
      letter-spacing: .08em;
    }

    .facts {
      display: grid; border-top: 1px solid rgba(255,255,255,.13); margin-top: 8px;
    }
    @media (min-width: 800px) {
      .facts { grid-template-columns: repeat(3, 1fr); }
      .facts .fact { border-right: 1px solid rgba(255,255,255,.08); }
      .facts .fact:last-child { border-right: 0; }
    }
    .fact {
      padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.08);
      display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: baseline;
    }
    @media (min-width: 800px) {
      .fact { padding: 18px 22px; border-bottom: 0; }
      .fact:first-child { padding-left: 0; }
      .fact:last-child { padding-right: 0; }
    }
    .fact .meta {
      font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
      font-size: 10px; letter-spacing: .12em; text-transform: uppercase;
      color: rgba(255,255,255,.3);
    }
    .fact .val { font-size: 14px; font-weight: 600; color: rgba(255,255,255,.86); }
    .split { display: grid; gap: 18px; margin-top: 28px; }
    @media (min-width: 900px) { .split { grid-template-columns: 1fr 1fr; gap: 28px; } }
    .panel {
      border-radius: 22px; padding: 24px;
      border: 1px solid rgba(255,255,255,.08);
      background: linear-gradient(180deg, rgba(1,139,141,.1), rgba(255,255,255,.02));
    }
    .panel h4 {
      font-size: 13px; letter-spacing: .14em; text-transform: uppercase;
      color: rgba(255,255,255,.45); margin-bottom: 10px; font-weight: 800;
    }
    .panel p { color: rgba(255,255,255,.72); line-height: 1.7; font-size: 15px; }
    .outcomes { display: grid; gap: 12px; margin-top: 28px; }
    @media (min-width: 800px) { .outcomes { grid-template-columns: repeat(3, 1fr); } }
    .outcome {
      padding: 20px; border-radius: 18px;
      border: 1px solid rgba(255,255,255,.08); background: rgba(255,255,255,.03);
    }
    .outcome .odot {
      width: 10px; height: 10px; border-radius: 50%; margin-bottom: 14px;
      background: var(--marrs-bright); box-shadow: 0 0 16px var(--marrs);
    }
    .outcome h5 { font-size: 18px; font-weight: 800; margin-bottom: 6px; }
    .outcome span { color: rgba(255,255,255,.55); font-size: 13px; }

    .cta-section {
      position: relative; overflow: hidden; background: #000;
      border-top: 1px solid rgba(255,255,255,.06);
      padding: 140px 20px 100px; text-align: center;
    }
    .cta-bg { position: absolute; inset: -20% 0 0; z-index: 0; will-change: transform; }
    .cta-bg img { width: 100%; height: 100%; object-fit: cover; filter: brightness(.35) saturate(1.1); }
    .cta-bg::after {
      content: ""; position: absolute; inset: 0;
      background: linear-gradient(180deg, rgba(0,0,0,.2), rgba(0,0,0,.88) 70%, #000);
    }
    .cta-inner { position: relative; z-index: 1; max-width: 820px; margin: 0 auto; }
    .cta-pill {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 8px 14px; border-radius: 999px; margin-bottom: 28px;
      border: 1px solid rgba(255,255,255,.18); background: rgba(255,255,255,.08);
      backdrop-filter: blur(10px); font-size: 12px; font-weight: 800;
      letter-spacing: .16em; text-transform: uppercase; color: rgba(255,255,255,.8);
    }
    .cta-inner h2 {
      font-size: clamp(40px, 8vw, 88px); font-weight: 900;
      letter-spacing: -.04em; line-height: 1.02; margin-bottom: 18px;
    }
    .cta-inner p {
      font-size: clamp(16px, 2.2vw, 22px); color: rgba(255,255,255,.7);
      line-height: 1.6; margin-bottom: 32px;
    }
    .cta-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }

    footer {
      background: #000; border-top: 1px solid rgba(255,255,255,.06);
      padding: 48px clamp(20px, 4vw, 56px) 36px;
    }
    .foot-grid { display: grid; gap: 28px; max-width: 1100px; margin: 0 auto 36px; }
    @media (min-width: 800px) { .foot-grid { grid-template-columns: 1.2fr 1fr 1fr 1fr; } }
    .foot-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
    .foot-brand img { width: 26px; height: 26px; border-radius: 7px; object-fit: cover; }
    .foot-brand strong { font-size: 15px; font-weight: 800; }
    .foot-brand + p { color: rgba(255,255,255,.45); font-size: 13px; line-height: 1.6; max-width: 260px; }
    .foot-col h6 {
      font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
      color: rgba(255,255,255,.4); margin-bottom: 14px; font-weight: 800;
    }
    .foot-col a { display: block; color: rgba(255,255,255,.7); font-size: 14px; font-weight: 600; margin-bottom: 10px; }
    .foot-col a:hover { color: #fff; }
    .foot-bottom {
      max-width: 1100px; margin: 0 auto; display: flex; flex-wrap: wrap; gap: 12px;
      justify-content: space-between; color: rgba(255,255,255,.32); font-size: 12px;
      border-top: 1px solid rgba(255,255,255,.06); padding-top: 18px;
    }
    .top-btn {
      position: fixed; right: 18px; bottom: 18px; z-index: 40;
      width: 42px; height: 42px; border-radius: 50%;
      border: 1px solid rgba(255,255,255,.16);
      background: rgba(0,8,10,.7); backdrop-filter: blur(10px);
      color: #fff; font-size: 18px; opacity: 0; pointer-events: none; transition: opacity .2s;
    }
    .top-btn.show { opacity: 1; pointer-events: auto; }
    .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
    .reveal.in { opacity: 1; transform: none; }
  
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .neon-hero, .hero-caustic, .hero-foam, .hero-glow-pulse, .scroll-mouse i { animation: none !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

    /* ===== Batch 1 incremental: #setup teaching panels + /availability ===== */
    .setup-section { min-height: auto; }
    .setup-grid {
      display: grid; gap: 18px;
    }
    @media (min-width: 1080px) {
      .setup-grid { grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: stretch; }
    }
    .setup-card {
      display: flex; flex-direction: column; gap: 16px;
      padding: 22px; border-radius: 22px;
      border: 1px solid rgba(255,255,255,.08);
      background: linear-gradient(180deg, rgba(1,139,141,.1), rgba(255,255,255,.02));
    }
    .setup-card-head .mono { margin-bottom: 8px; }
    .setup-card-head h3 {
      font-size: 22px; font-weight: 800; letter-spacing: -.02em;
      margin-bottom: 8px; line-height: 1.2;
    }
    .setup-card-head p {
      color: rgba(255,255,255,.62); font-size: 14px; line-height: 1.7; font-weight: 400;
    }
    .teach-panel {
      position: relative;
      border-radius: 16px;
      border: 1px solid rgba(255,255,255,.1);
      background: rgba(0,8,10,.72);
      padding: 16px 16px 14px;
      box-shadow: inset 0 1px 0 rgba(255,255,255,.04);
    }
    .teach-caption {
      font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
      font-size: 10px; letter-spacing: .12em; text-transform: uppercase;
      color: rgba(255,255,255,.38); margin-bottom: 12px;
    }
    .teach-row {
      display: grid; grid-template-columns: 88px 1fr; gap: 10px;
      align-items: start; padding: 8px 0;
      border-top: 1px solid rgba(255,255,255,.06);
    }
    .teach-row:first-of-type { border-top: 0; }
    .teach-row .k {
      font-size: 11px; font-weight: 800; letter-spacing: .06em;
      text-transform: uppercase; color: rgba(255,255,255,.42); padding-top: 4px;
    }
    .teach-row .v {
      display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
      color: rgba(255,255,255,.9); font-size: 13px; font-weight: 600;
    }
    .teach-row code, .teach-code .tok, .teach-panel code {
      font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
      font-size: 12px; font-weight: 600; color: #c9f7f7;
      background: rgba(1,139,141,.16);
      border: 1px solid rgba(1,139,141,.28);
      border-radius: 8px; padding: 3px 7px;
      word-break: break-all;
    }
    .teach-mark {
      border-radius: 10px;
      background: rgba(1,139,141,.08);
      margin: 0 -6px; padding-left: 6px; padding-right: 6px;
      box-shadow: inset 2px 0 0 var(--marrs-bright);
    }
    .teach-note {
      margin-top: 12px; color: rgba(255,255,255,.5);
      font-size: 12px; line-height: 1.65;
    }
    .teach-note code {
      padding: 1px 5px; font-size: 11px;
    }
    .teach-term { padding-bottom: 14px; }
    .teach-code {
      margin: 0; overflow-x: auto;
      font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
      font-size: 12px; line-height: 1.7; color: rgba(255,255,255,.86);
      white-space: pre;
    }
    .teach-code .cmt { color: rgba(255,255,255,.38); }
    .teach-mark-line {
      display: inline; box-shadow: inset 0 -2px 0 rgba(2,176,179,.55);
    }
    .teach-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
    .copy-btn {
      display: inline-flex; align-items: center; justify-content: center;
      min-height: 28px; padding: 0 10px; border-radius: 999px;
      border: 1px solid rgba(255,255,255,.16);
      background: rgba(255,255,255,.05);
      color: rgba(255,255,255,.86); font-size: 11px; font-weight: 800;
      letter-spacing: .04em; cursor: pointer;
    }
    .copy-btn:hover { background: rgba(255,255,255,.12); color: #fff; }
    .copy-btn.copied {
      border-color: rgba(2,176,179,.55); color: #9cf0f1;
    }
    a.copy-btn.linkish { text-decoration: none; }
    .setup-guide {
      margin-top: auto; font-size: 13px; font-weight: 800;
      color: rgba(255,255,255,.72);
    }
    .setup-guide:hover { color: #fff; }
    .hslide-avail-link {
      margin: 0 0 18px; font-size: 14px; font-weight: 700;
    }
    .hslide-avail-link a {
      color: rgba(255,255,255,.82);
      border-bottom: 1px solid rgba(255,255,255,.3);
    }
    .hslide-avail-link a:hover { color: #fff; }

    .copy-toast {
      position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%) translateY(12px);
      z-index: 80; opacity: 0; pointer-events: none;
      padding: 10px 16px; border-radius: 999px;
      background: rgba(12,16,18,.9); border: 1px solid rgba(255,255,255,.12);
      backdrop-filter: blur(12px);
      font-size: 13px; font-weight: 700; color: #fff;
      transition: opacity .2s, transform .2s;
    }
    .copy-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

    .avail-main {
      min-height: 100svh; background: #000;
      padding: 120px clamp(20px, 4vw, 56px) 80px;
    }
    .avail-inner { width: min(1100px, 100%); margin: 0 auto; }
    .avail-hero { margin-bottom: 36px; }
    .avail-hero h1 {
      font-size: clamp(36px, 6vw, 64px); font-weight: 800;
      letter-spacing: -.035em; line-height: 1.08; margin: 8px 0 14px;
    }
    .avail-sub {
      max-width: 640px; color: rgba(255,255,255,.66);
      font-size: clamp(15px, 2vw, 18px); line-height: 1.7;
    }
    .avail-meta {
      display: flex; flex-wrap: wrap; gap: 12px 20px;
      align-items: center; margin: 22px 0 28px;
    }
    .avail-badge {
      display: inline-flex; align-items: center; gap: 8px;
      min-height: 36px; padding: 0 14px; border-radius: 999px;
      border: 1px solid rgba(255,255,255,.16);
      background: rgba(255,255,255,.05);
      font-size: 13px; font-weight: 800; letter-spacing: .08em;
    }
    .avail-badge::before {
      content: ""; width: 8px; height: 8px; border-radius: 50%;
      background: rgba(255,255,255,.4);
    }
    .avail-badge.ok { border-color: rgba(2,176,179,.45); color: #9cf0f1; }
    .avail-badge.ok::before { background: var(--marrs-bright); box-shadow: 0 0 10px var(--marrs); }
    .avail-badge.partial { border-color: rgba(251,188,5,.45); color: #ffe08a; }
    .avail-badge.partial::before { background: #FBBC05; }
    .avail-badge.down { border-color: rgba(234,67,53,.45); color: #ffb3ab; }
    .avail-badge.down::before { background: #EA4335; }
    .avail-badge.unknown { color: rgba(255,255,255,.7); }
    .avail-updated { color: rgba(255,255,255,.45); font-size: 13px; }
    .avail-grid { display: grid; gap: 16px; }
    @media (min-width: 800px) { .avail-grid { grid-template-columns: repeat(3, 1fr); } }
    .avail-card {
      padding: 22px; border-radius: 22px;
      border: 1px solid rgba(255,255,255,.08);
      background: linear-gradient(180deg, rgba(1,139,141,.1), rgba(255,255,255,.02));
    }
    .avail-card h2 { font-size: 20px; font-weight: 800; margin-bottom: 16px; }
    .avail-metric { margin-bottom: 14px; }
    .avail-metric .label {
      font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
      font-size: 10px; letter-spacing: .12em; text-transform: uppercase;
      color: rgba(255,255,255,.38); margin-bottom: 6px;
    }
    .avail-metric .num {
      font-size: clamp(28px, 4vw, 36px); font-weight: 800; letter-spacing: -.03em;
    }
    .avail-empty {
      padding: 28px 24px; border-radius: 22px;
      border: 1px solid rgba(255,255,255,.08);
      background: rgba(255,255,255,.03);
      color: rgba(255,255,255,.76); font-size: 16px; line-height: 1.75;
    }
    .avail-empty strong { color: #fff; }
    .avail-footnote {
      margin-top: 28px; color: rgba(255,255,255,.42);
      font-size: 13px; line-height: 1.7;
    }
    .avail-na { color: rgba(255,255,255,.4); font-size: 15px; font-weight: 600; }