/* ============================================================
   Bianex — futuristic marketing site
   Pure CSS/JS + Three.js. GitHub Pages friendly.
   ============================================================ */

:root {
  --bg: #05060f;
  --ink: #eef1ff;
  --muted: #9aa3c7;
  --cyan: #22d3ee;
  --blue: #4f7cff;
  --indigo: #6366f1;
  --violet: #a855f7;
  --magenta: #d946ef;
  --green: #34d399;
  --card: rgba(255, 255, 255, 0.04);
  --stroke: rgba(255, 255, 255, 0.10);
  --grad: linear-gradient(100deg, var(--cyan), var(--blue) 40%, var(--violet) 75%, var(--magenta));
  --radius: 22px;
  --maxw: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, .nav-name { font-family: "Space Grotesk", "Inter", sans-serif; letter-spacing: -0.02em; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
.shimmer { background-size: 220% auto; animation: shimmer 6s linear infinite; }
@keyframes shimmer { to { background-position: 220% center; } }

/* ---------- Loader ---------- */
.loader { position: fixed; inset: 0; z-index: 999; display: grid; place-items: center; background: var(--bg); transition: opacity .7s var(--ease), visibility .7s; }
.loader.done { opacity: 0; visibility: hidden; }
.loader-orb { width: 88px; height: 88px; display: grid; place-items: center; position: relative; }
.loader-orb img { width: 60px; height: 60px; filter: drop-shadow(0 0 26px rgba(99,102,241,.8)); animation: floaty 2.2s ease-in-out infinite; }
.loader-orb::before { content: ""; position: absolute; inset: 0; border-radius: 50%; border: 2px solid transparent; border-top-color: var(--cyan); border-right-color: var(--violet); animation: spin 1s linear infinite; }

/* ---------- Cosmic background ---------- */
.bg { position: fixed; inset: 0; z-index: -2; overflow: hidden; background:
  radial-gradient(1200px 700px at 70% -10%, #11163a 0%, transparent 60%),
  radial-gradient(900px 600px at 10% 10%, #0c1030 0%, transparent 55%),
  var(--bg); }
.bg-grid { position: absolute; inset: -2px;
  background-image: linear-gradient(rgba(120,140,255,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(120,140,255,0.05) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 75%); }
.aurora { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; mix-blend-mode: screen; will-change: transform; }
.aurora-1 { width: 46vw; height: 46vw; left: -8vw; top: -6vw; background: radial-gradient(circle, var(--blue), transparent 65%); animation: drift1 22s var(--ease) infinite alternate; }
.aurora-2 { width: 40vw; height: 40vw; right: -6vw; top: 8vw; background: radial-gradient(circle, var(--violet), transparent 65%); animation: drift2 26s var(--ease) infinite alternate; }
.aurora-3 { width: 50vw; height: 50vw; left: 25vw; top: 55vh; background: radial-gradient(circle, var(--cyan), transparent 65%); opacity: .3; animation: drift3 30s var(--ease) infinite alternate; }
@keyframes drift1 { to { transform: translate(8vw, 10vh) scale(1.15); } }
@keyframes drift2 { to { transform: translate(-10vw, 6vh) scale(1.1); } }
@keyframes drift3 { to { transform: translate(-6vw, -12vh) scale(1.2); } }

/* ---------- Scroll progress ---------- */
.scroll-progress { position: fixed; top: 0; left: 0; height: 3px; width: 0%; z-index: 100; background: var(--grad); box-shadow: 0 0 18px rgba(120,140,255,.6); }

/* ---------- Nav ---------- */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 90; display: flex; align-items: center; gap: 18px;
  padding: 16px clamp(16px, 4vw, 48px); transition: background .4s var(--ease), backdrop-filter .4s var(--ease), padding .4s var(--ease), border-color .4s var(--ease); border-bottom: 1px solid transparent; }
.nav.scrolled { background: rgba(6, 8, 20, 0.6); backdrop-filter: blur(18px) saturate(140%); -webkit-backdrop-filter: blur(18px) saturate(140%); border-bottom-color: var(--stroke); padding-top: 12px; padding-bottom: 12px; }
.nav-brand { display: flex; align-items: center; gap: 10px; margin-right: auto; }
.nav-logo { width: 34px; height: 34px; filter: drop-shadow(0 0 12px rgba(99,102,241,.55)); }
.nav-name { font-weight: 700; font-size: 20px; }
.badge { font: 700 10px/1 "Space Grotesk", sans-serif; letter-spacing: .12em; padding: 4px 7px; border-radius: 6px; color: #fff; background: linear-gradient(120deg, var(--violet), var(--magenta)); box-shadow: 0 0 16px rgba(217,70,239,.5); }
.nav-links { display: flex; gap: 28px; }
.nav-links a { color: var(--muted); font-size: 15px; font-weight: 500; position: relative; transition: color .25s; }
.nav-links a::after { content: ""; position: absolute; left: 0; bottom: -6px; height: 2px; width: 0; background: var(--grad); transition: width .3s var(--ease); }
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { width: 100%; }
.nav-toggle { display: none; background: none; border: 0; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--ink); border-radius: 2px; transition: .3s var(--ease); }

/* ---------- Buttons ---------- */
.btn { position: relative; display: inline-flex; align-items: center; justify-content: center; padding: 12px 22px; border-radius: 999px; font-weight: 600; font-size: 15px; cursor: pointer; border: 1px solid transparent; overflow: hidden; transition: transform .25s var(--ease), box-shadow .3s var(--ease), background .3s; }
.btn span { position: relative; z-index: 2; }
.btn-lg { padding: 15px 30px; font-size: 16px; }
.btn-primary { color: #fff; background: var(--grad); background-size: 180% 180%; box-shadow: 0 10px 30px -8px rgba(79,124,255,.6); animation: btnShift 6s ease infinite; }
@keyframes btnShift { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
.btn-primary:hover { box-shadow: 0 16px 40px -8px rgba(168,85,247,.7); }
.btn-ghost { color: var(--ink); background: var(--card); border-color: var(--stroke); backdrop-filter: blur(8px); }
.btn-ghost:hover { border-color: rgba(120,140,255,.5); box-shadow: 0 10px 30px -10px rgba(79,124,255,.5); }
.nav-cta { padding: 10px 18px; }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100svh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 120px clamp(16px,5vw,40px) 70px; overflow: hidden; }
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; opacity: 0; transition: opacity 1.2s var(--ease); }
.has-3d .hero-canvas { opacity: 1; }
.no-3d .hero-canvas { display: none; }
/* Elegant CSS planet shows immediately; 3D fades in over it once loaded */
.hero-fallback { position: absolute; inset: 0; display: grid; place-items: center; z-index: 0; opacity: 1; transition: opacity .9s var(--ease); }
.has-3d .hero-fallback { opacity: 0; }
.hero-fallback .hero-logo { width: 130px; height: 130px; filter: drop-shadow(0 0 40px rgba(99,102,241,.8)); animation: floaty 6s ease-in-out infinite; }
.hero-fallback .orbit-ring { position: absolute; border-radius: 50%; border: 1px solid rgba(120,140,255,.25); }
.hero-fallback .ring-a { width: 320px; height: 320px; border-top-color: var(--cyan); border-right-color: var(--violet); animation: spin 14s linear infinite; }
.hero-fallback .ring-b { width: 220px; height: 220px; border-bottom-color: var(--blue); border-left-color: var(--magenta); animation: spin 9s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes floaty { 0%,100% { transform: translateY(-6px); } 50% { transform: translateY(6px); } }

.hero-inner { position: relative; z-index: 3; max-width: 860px; pointer-events: none; }
.hero-inner::before { content: ""; position: absolute; inset: -14% -22%; z-index: -1; pointer-events: none;
  background: radial-gradient(ellipse 62% 58% at 50% 46%, rgba(5,6,15,.66) 0%, rgba(5,6,15,.34) 46%, transparent 72%); }
.hero-inner a, .hero-inner .pill { pointer-events: auto; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; text-transform: uppercase; letter-spacing: .28em; font-size: 12px; color: var(--cyan); font-weight: 600; margin: 0 0 18px; padding: 7px 14px; border: 1px solid var(--stroke); border-radius: 999px; background: rgba(8,12,30,.5); backdrop-filter: blur(8px); }
.ping { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 0 rgba(34,211,238,.6); animation: ping 1.8s ease-out infinite; }
@keyframes ping { 0% { box-shadow: 0 0 0 0 rgba(34,211,238,.55); } 70%,100% { box-shadow: 0 0 0 10px rgba(34,211,238,0); } }
.hero-title { font-size: clamp(70px, 14vw, 170px); line-height: .86; margin: 0; font-weight: 700; }
.hero-tagline { font-size: clamp(20px, 4vw, 32px); font-weight: 600; margin: 16px 0 0; }
.hero-sub { color: var(--muted); font-size: clamp(15px,2.2vw,18px); max-width: 620px; margin: 18px auto 0; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 34px; }
.hero-pills { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 28px; }
.pill { display: inline-flex; align-items: center; gap: 8px; padding: 8px 16px; border-radius: 999px; background: rgba(8,12,30,.55); border: 1px solid var(--stroke); font-size: 13px; color: var(--muted); backdrop-filter: blur(8px); }
.pill .dot { width: 8px; height: 8px; border-radius: 50%; }
.dot.g { background: var(--green); box-shadow: 0 0 10px var(--green); }
.dot.c { background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.dot.p { background: var(--violet); box-shadow: 0 0 10px var(--violet); }
.scroll-hint { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); width: 26px; height: 42px; border: 2px solid rgba(154,163,199,.4); border-radius: 14px; z-index: 3; }
.scroll-hint span { position: absolute; top: 8px; left: 50%; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: var(--cyan); animation: scrolly 1.8s ease infinite; }
@keyframes scrolly { 0% { opacity: 0; transform: translateY(0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }

/* ---------- Marquee ---------- */
.marquee { overflow: hidden; border-top: 1px solid var(--stroke); border-bottom: 1px solid var(--stroke); padding: 16px 0; background: rgba(255,255,255,.015); position: relative; z-index: 1; }
.marquee-track { display: flex; gap: 26px; width: max-content; animation: marquee 30s linear infinite; }
.marquee-track span { font-family: "Space Grotesk", sans-serif; font-weight: 600; font-size: 18px; color: rgba(154,163,199,.55); letter-spacing: .06em; }
.marquee-track .star { color: var(--violet); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Sections ---------- */
.section { max-width: var(--maxw); margin: 0 auto; padding: clamp(70px, 12vw, 130px) clamp(16px,5vw,40px); position: relative; z-index: 1; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.kicker { text-transform: uppercase; letter-spacing: .26em; font-size: 12px; color: var(--violet); font-weight: 600; margin: 0 0 14px; }
.section h2 { font-size: clamp(30px, 5.5vw, 54px); margin: 0; line-height: 1.05; }
.lead { color: var(--muted); font-size: clamp(15px,2.2vw,18px); margin: 16px auto 0; }

/* ---------- Feature grid ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { position: relative; padding: 30px 26px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--stroke); overflow: hidden; transition: border-color .4s, box-shadow .4s; transform-style: preserve-3d; will-change: transform; }
.card:hover { border-color: rgba(120,140,255,.45); box-shadow: 0 30px 60px -30px rgba(79,124,255,.5); }
.card-glow { position: absolute; width: 280px; height: 280px; border-radius: 50%; background: radial-gradient(circle, rgba(120,140,255,.22), transparent 60%); top: var(--my,50%); left: var(--mx,50%); transform: translate(-50%,-50%); opacity: 0; transition: opacity .35s; pointer-events: none; }
.card:hover .card-glow { opacity: 1; }
.ico { width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center; margin-bottom: 18px; background: linear-gradient(145deg, rgba(120,140,255,.18), rgba(168,85,247,.12)); border: 1px solid var(--stroke); }
.ico svg { width: 28px; height: 28px; fill: none; stroke: var(--cyan); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.card:nth-child(2) .ico svg { stroke: var(--violet); }
.card:nth-child(3) .ico svg { stroke: var(--magenta); }
.card:nth-child(4) .ico svg { stroke: var(--green); }
.card:nth-child(5) .ico svg { stroke: var(--blue); }
.card h3 { font-size: 21px; margin: 0 0 8px; }
.card p { color: var(--muted); font-size: 14.5px; margin: 0; }

/* ---------- Modes ---------- */
.modes { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.mode { text-align: center; padding: 30px 24px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--stroke); transition: border-color .4s; will-change: transform; }
.mode.featured { background: linear-gradient(160deg, rgba(99,102,241,.14), rgba(168,85,247,.06)); border-color: rgba(120,140,255,.3); }
.mode-visual { display: grid; place-items: center; margin-bottom: 22px; }
.mock { width: 132px; height: 250px; border-radius: 26px; border: 2px solid rgba(255,255,255,.16); background: linear-gradient(160deg,#0c1030,#070912); padding: 10px; display: flex; flex-direction: column; gap: 8px; box-shadow: 0 30px 60px -30px rgba(0,0,0,.8), inset 0 0 30px rgba(79,124,255,.08); }
.mock-bar { height: 18px; border-radius: 8px; background: linear-gradient(90deg, rgba(120,140,255,.35), rgba(168,85,247,.25)); }
.mock-screen { flex: 1; border-radius: 12px; background: radial-gradient(circle at 50% 30%, rgba(34,211,238,.18), transparent 60%), linear-gradient(160deg, rgba(99,102,241,.10), rgba(168,85,247,.05)); }
.mock-screen.full { border-radius: 18px; }
.mock-pill { height: 26px; width: 80%; margin: 4px auto 0; border-radius: 999px; background: linear-gradient(90deg, var(--blue), var(--violet)); box-shadow: 0 0 20px rgba(79,124,255,.6); animation: pulse 2.6s ease infinite; }
@keyframes pulse { 0%,100% { opacity:.8; transform: scale(1);} 50% { opacity:1; transform: scale(1.04);} }
.mode h3 { font-size: 22px; margin: 0 0 8px; }
.mode p { color: var(--muted); font-size: 14.5px; margin: 0; }

/* ---------- Privacy ---------- */
.privacy-wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 50px; align-items: center; }
.privacy-copy h2 { font-size: clamp(28px,4.6vw,48px); }
.checks { list-style: none; padding: 0; margin: 24px 0; display: grid; gap: 12px; }
.checks li { position: relative; padding-left: 34px; color: var(--ink); font-size: 15.5px; }
.checks li::before { content: ""; position: absolute; left: 0; top: 2px; width: 22px; height: 22px; border-radius: 7px; background: linear-gradient(145deg, var(--green), var(--cyan)); box-shadow: 0 0 14px rgba(52,211,153,.4); }
.checks li::after { content: ""; position: absolute; left: 7px; top: 6px; width: 7px; height: 11px; border: solid #05060f; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.privacy-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat { position: relative; padding: 28px 22px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--stroke); text-align: center; overflow: hidden; }
.stat::before { content:""; position:absolute; inset:0; background: var(--grad); opacity:.06; }
.stat .num { font-family: "Space Grotesk",sans-serif; font-size: 52px; font-weight: 700; line-height: 1; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat .suffix { font-family: "Space Grotesk",sans-serif; font-size: 26px; font-weight: 700; color: var(--cyan); }
.stat .lab { display: block; margin-top: 10px; color: var(--muted); font-size: 13.5px; }

/* ---------- Gallery ---------- */
.gallery { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.shot { margin: 0; position: relative; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--stroke); background: #0a0c1c; transition: box-shadow .4s, border-color .4s; will-change: transform; }
.shot img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 9/19; transition: transform .6s var(--ease); }
.shot figcaption { position: absolute; left: 14px; bottom: 12px; padding: 6px 12px; border-radius: 999px; font-size: 12.5px; font-weight: 600; background: rgba(6,8,20,.7); border: 1px solid var(--stroke); backdrop-filter: blur(8px); }
.shot:hover { border-color: rgba(120,140,255,.45); box-shadow: 0 40px 70px -30px rgba(79,124,255,.55); }
.shot:hover img { transform: scale(1.05); }

/* ---------- Waitlist / CTA ---------- */
.cta-card { position: relative; text-align: center; padding: clamp(40px,7vw,84px) clamp(20px,5vw,60px); border-radius: 34px; border: 1px solid var(--stroke); overflow: hidden;
  background: radial-gradient(800px 420px at 50% -20%, rgba(99,102,241,.28), transparent 60%), linear-gradient(160deg, rgba(20,24,54,.6), rgba(8,10,24,.6)); backdrop-filter: blur(10px); }
.cta-orbit { position: relative; width: 110px; height: 110px; margin: 0 auto 18px; display: grid; place-items: center; }
.cta-orbit img { width: 66px; height: 66px; filter: drop-shadow(0 0 26px rgba(99,102,241,.8)); z-index: 2; }
.cta-orbit .orbit-ring { position: absolute; border-radius: 50%; border: 1px solid rgba(120,140,255,.25); }
.cta-orbit .ring-a { width: 110px; height: 110px; border-top-color: var(--cyan); border-right-color: var(--violet); animation: spin 12s linear infinite; }
.cta-orbit .ring-b { width: 78px; height: 78px; border-bottom-color: var(--magenta); animation: spin 8s linear infinite reverse; }
.soon-chip { display: inline-flex; align-items: center; gap: 8px; padding: 7px 15px; border-radius: 999px; border: 1px solid var(--stroke); background: rgba(8,12,30,.5); color: var(--cyan); font-weight: 600; font-size: 12.5px; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 18px; }
.cta-card h2 { font-size: clamp(30px,5vw,52px); }

/* signup form */
.signup { max-width: 480px; margin: 28px auto 0; }
.signup-field { display: flex; gap: 10px; padding: 7px; border: 1px solid var(--stroke); border-radius: 999px; background: rgba(6,8,20,.55); transition: border-color .3s, box-shadow .3s; }
.signup-field:focus-within { border-color: rgba(120,140,255,.6); box-shadow: 0 0 0 4px rgba(79,124,255,.15); }
.signup-field input { flex: 1; min-width: 0; background: transparent; border: 0; outline: none; color: var(--ink); font-size: 15px; padding: 10px 16px; font-family: inherit; }
.signup-field input::placeholder { color: rgba(154,163,199,.7); }
.signup-field .btn { white-space: nowrap; }
.signup-msg { min-height: 22px; margin: 12px 0 0; font-size: 14px; font-weight: 500; }
.signup-msg.ok { color: var(--green); }
.signup-msg.err { color: #ff7a90; }
.cta-note { margin-top: 18px; color: var(--muted); font-size: 13.5px; }
.cta-note a { color: var(--cyan); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--stroke); padding: 50px clamp(16px,5vw,40px) 36px; max-width: var(--maxw); margin: 0 auto; position: relative; z-index: 1; }
.footer-inner { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; align-items: center; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand img { width: 40px; height: 40px; }
.footer-brand strong { display: block; font-family: "Space Grotesk",sans-serif; font-size: 18px; }
.footer-brand span { color: var(--muted); font-size: 13px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a { color: var(--muted); font-size: 14px; transition: color .25s; }
.footer-links a:hover { color: var(--ink); }
.copyright { margin: 30px 0 0; color: rgba(154,163,199,.6); font-size: 13px; text-align: center; }

/* ---------- Reveal (JS-gated so no-JS still shows content) ---------- */
.js .reveal { opacity: 0; transform: translateY(38px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- Custom cursor (desktop, fine pointer only) ---------- */
.cursor, .cursor-dot { position: fixed; top: 0; left: 0; border-radius: 50%; pointer-events: none; z-index: 200; opacity: 0; transition: opacity .3s, width .25s var(--ease), height .25s var(--ease), background .25s, border-color .25s; will-change: transform; transform: translate(-50%, -50%); }
.cursor { width: 34px; height: 34px; border: 1.5px solid rgba(120,140,255,.7); mix-blend-mode: difference; }
.cursor-dot { width: 6px; height: 6px; background: var(--cyan); }
body.cursor-on .cursor, body.cursor-on .cursor-dot { opacity: 1; }
body.cursor-hover .cursor { width: 56px; height: 56px; border-color: rgba(168,85,247,.9); background: rgba(120,140,255,.08); }

/* ---------- Section index numbers (editorial touch) ---------- */
.kicker { display: inline-flex; align-items: center; gap: 10px; }
.kicker .idx { font-family: "Space Grotesk", sans-serif; font-size: 12px; color: rgba(154,163,199,.55); letter-spacing: .12em; padding-right: 10px; border-right: 1px solid var(--stroke); }
.section-head .kicker { justify-content: center; }

/* ---------- Premium polish ---------- */
.section { padding: clamp(80px, 13vw, 150px) clamp(16px,5vw,40px); }
.section h2 { letter-spacing: -0.03em; }
.lead { max-width: 600px; }
.card { transition: transform .5s var(--ease), border-color .4s, box-shadow .4s; }
.card h3 { letter-spacing: -0.01em; }
.mock { transition: transform .5s var(--ease); }
.mode:hover .mock { transform: translateY(-6px); }
.btn { letter-spacing: .01em; }
.hero-title { letter-spacing: -0.04em; }
::selection { background: rgba(120,140,255,.35); color: #fff; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .feature-grid, .modes, .gallery { grid-template-columns: repeat(2,1fr); }
  .privacy-wrap { grid-template-columns: 1fr; gap: 34px; }
}
@media (max-width: 640px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav.open .nav-links { display: flex; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; gap: 0; padding: 10px 24px 20px; background: rgba(6,8,20,.96); backdrop-filter: blur(18px); border-bottom: 1px solid var(--stroke); }
  .nav.open .nav-links a { padding: 14px 0; border-bottom: 1px solid var(--stroke); }
  .feature-grid, .modes, .gallery, .privacy-stats { grid-template-columns: 1fr; }
  .signup-field { flex-direction: column; border-radius: 20px; }
  .signup-field .btn { width: 100%; }
}