:root {
  color-scheme: dark;
  --ink: #f8f7ff;
  --muted: #aaa6bf;
  --line: rgba(255, 255, 255, 0.12);
  --panel: rgba(22, 18, 48, 0.62);
  --purple: #9b7cff;
  --violet: #6c48e8;
  --green: #8df0c8;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 18% 4%, rgba(120, 82, 255, .20), transparent 28rem),
    radial-gradient(circle at 92% 34%, rgba(79, 45, 185, .16), transparent 30rem),
    #080710;
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; }
.shell { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 7, 16, .72);
  backdrop-filter: blur(22px) saturate(150%);
}
.nav-inner { height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-size: 18px; font-weight: 750; letter-spacing: -.02em; }
.brand img { width: 36px; height: 36px; border-radius: 10px; }
.nav-links { display: flex; align-items: center; gap: 24px; color: var(--muted); font-size: 14px; }
.nav-links a { text-decoration: none; }
.nav-links a:hover { color: white; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 14px;
  color: #0c071c;
  background: linear-gradient(135deg, #eee8ff, #bcaaff);
  box-shadow: 0 12px 36px rgba(107, 67, 232, .25), inset 0 1px rgba(255,255,255,.7);
  text-decoration: none;
  font-weight: 750;
  transition: transform .18s ease, filter .18s ease;
}
.button:hover { transform: translateY(-2px); filter: brightness(1.06); }
.button.secondary { color: var(--ink); background: rgba(255,255,255,.055); box-shadow: none; }
.button.small { min-height: 38px; padding: 0 15px; border-radius: 11px; }
.hero { padding: 88px 0 70px; display: grid; grid-template-columns: 1.06fr .94fr; gap: 70px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; color: #c9bcff; font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 15px var(--green); }
h1 { margin: 20px 0 20px; max-width: 760px; font-size: clamp(54px, 7vw, 88px); line-height: .98; letter-spacing: -.065em; }
h1 span { color: #b8a3ff; }
.lede { max-width: 620px; margin: 0; color: #bbb6cf; font-size: clamp(18px, 2vw, 21px); line-height: 1.55; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px; }
.fine { margin-top: 14px; color: #858095; font-size: 13px; }
.app-stage { position: relative; min-height: 530px; display: grid; place-items: center; }
.app-stage::before { content: ""; position: absolute; width: 340px; height: 340px; border-radius: 50%; background: rgba(126, 83, 255, .28); filter: blur(70px); animation: breathe 6s ease-in-out infinite; }
.app-window { position: relative; width: min(100%, 470px); overflow: hidden; border: 1px solid rgba(255,255,255,.16); border-radius: 24px; background: rgba(21, 18, 41, .83); box-shadow: 0 44px 100px rgba(0,0,0,.55), inset 0 1px rgba(255,255,255,.08); backdrop-filter: blur(28px); transform: rotate(1.4deg); animation: float-window 7s ease-in-out infinite; }
.window-bar { height: 42px; display: flex; align-items: center; gap: 7px; padding: 0 16px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.035); }
.dot { width: 10px; height: 10px; border-radius: 50%; background: #403b54; }
.window-body { padding: 22px; }
.mini-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.mini-title { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.mini-title img { width: 32px; height: 32px; border-radius: 9px; }
.timer { padding: 8px 11px; border: 1px solid rgba(141,240,200,.22); border-radius: 11px; color: var(--green); background: rgba(141,240,200,.06); font: 700 13px ui-monospace, SFMono-Regular, Menlo, monospace; }
.question-card { padding: 18px; border: 1px solid var(--line); border-radius: 17px; background: rgba(255,255,255,.045); }
.question-image { height: 120px; display: grid; place-items: center; border-radius: 12px; color: #d7cff7; background: linear-gradient(145deg, #30275b, #17142b); font: 600 27px Georgia, serif; letter-spacing: .04em; }
.tags { display: flex; gap: 7px; flex-wrap: wrap; margin: 14px 0; }
.tag { padding: 5px 9px; border-radius: 999px; background: rgba(155,124,255,.12); color: #cfc3ff; font-size: 12px; }
.difficulty { display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; }
.difficulty span { padding: 8px; border: 1px solid var(--line); border-radius: 9px; text-align: center; color: #a8a3b7; font-size: 12px; }
.difficulty .active { color: white; border-color: rgba(155,124,255,.5); background: rgba(155,124,255,.14); }
.section { padding: 86px 0; border-top: 1px solid var(--line); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 32px; margin-bottom: 34px; }
h2 { margin: 0; max-width: 720px; font-size: clamp(34px, 4.8vw, 56px); line-height: 1.04; letter-spacing: -.045em; }
.section-head p { max-width: 430px; margin: 0; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.feature { min-height: 240px; padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: linear-gradient(145deg, rgba(255,255,255,.06), rgba(255,255,255,.025)); transition: transform .35s cubic-bezier(.2,.8,.2,1), border-color .35s ease, background .35s ease; }
.feature:hover { transform: translateY(-8px); border-color: rgba(155,124,255,.42); background: linear-gradient(145deg, rgba(155,124,255,.12), rgba(255,255,255,.03)); }
.feature-number { color: #9c88e7; font: 600 12px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .1em; }
.feature h3 { margin: 58px 0 9px; font-size: 22px; letter-spacing: -.025em; }
.feature p { margin: 0; color: var(--muted); }
.metrics { display: grid; grid-template-columns: 1.4fr .8fr .8fr; gap: 14px; }
.metric { padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: var(--panel); }
.metric strong { display: block; margin-bottom: 7px; font-size: clamp(30px, 4vw, 48px); letter-spacing: -.04em; }
.metric span { color: var(--muted); }
.bank-showcase { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 70px; }
.bank-showcase h2 { margin: 18px 0; }
.floating-stack { position: relative; min-height: 360px; perspective: 1000px; }
.float-card { position: absolute; left: 8%; right: 8%; padding: 22px; border: 1px solid rgba(255,255,255,.16); border-radius: 20px; background: rgba(27,22,54,.76); backdrop-filter: blur(24px); box-shadow: 0 24px 70px rgba(0,0,0,.3); animation: card-drift 6s ease-in-out infinite; }
.float-card:nth-child(1) { top: 0; transform: rotate(-3deg); }
.float-card:nth-child(2) { top: 112px; left: 18%; right: 0; animation-delay: -2s; }
.float-card:nth-child(3) { top: 226px; right: 14%; left: 0; transform: rotate(2deg); animation-delay: -4s; }
.float-card span, .float-card small { display: block; color: var(--muted); }
.float-card strong { display: block; margin: 6px 0; font-size: 25px; }
@keyframes breathe { 0%,100% { transform: scale(.88); opacity: .65; } 50% { transform: scale(1.16); opacity: 1; } }
@keyframes float-window { 0%,100% { transform: rotate(1.4deg) translateY(0); } 50% { transform: rotate(-.3deg) translateY(-14px); } }
@keyframes card-drift { 0%,100% { translate: 0 0; } 50% { translate: 0 -10px; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; } }
.download-panel { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 28px; padding: 38px; border: 1px solid rgba(175,155,255,.25); border-radius: 25px; background: linear-gradient(135deg, rgba(90,54,190,.24), rgba(255,255,255,.045)); box-shadow: inset 0 1px rgba(255,255,255,.08); }
.download-copy { display: flex; align-items: center; gap: 20px; }
.download-copy img { width: 74px; height: 74px; border-radius: 19px; }
.download-copy h2 { font-size: 32px; }
.download-copy p { margin: 4px 0 0; color: var(--muted); }
.legal-wrap { width: min(790px, calc(100% - 40px)); margin: 0 auto; padding: 72px 0 100px; }
.legal-wrap h1 { font-size: clamp(46px, 7vw, 72px); }
.legal-wrap .lede { font-size: 18px; }
.notice { margin: 28px 0 42px; padding: 18px 20px; border: 1px solid rgba(255,198,103,.28); border-radius: 15px; color: #ead8b6; background: rgba(255,198,103,.06); }
.legal { margin-top: 46px; }
.legal h2 { margin: 42px 0 12px; font-size: 24px; letter-spacing: -.025em; }
.legal h3 { margin: 26px 0 8px; font-size: 18px; }
.legal p, .legal li { color: #b9b4c8; }
.legal li + li { margin-top: 7px; }
.legal a { color: #d0c5ff; }
footer { padding: 30px 0 46px; border-top: 1px solid var(--line); color: #858095; font-size: 13px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: white; }
@media (max-width: 820px) {
  .nav-links > a:not(.button) { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 62px; gap: 36px; }
  .app-stage { min-height: 430px; }
  .section-head { display: block; }
  .section-head p { margin-top: 18px; }
  .feature-grid, .metrics, .bank-showcase { grid-template-columns: 1fr; }
  .feature { min-height: 205px; }
  .feature h3 { margin-top: 36px; }
  .download-panel { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .shell, .legal-wrap { width: min(100% - 28px, var(--max)); }
  .nav-inner { height: 62px; }
  .button.small { font-size: 13px; }
  h1 { font-size: 51px; }
  .hero-actions .button { width: 100%; }
  .app-stage { min-height: 365px; }
  .app-window { transform: none; }
  .window-body { padding: 15px; }
  .question-image { height: 94px; }
  .section { padding: 65px 0; }
  .download-panel { padding: 24px; }
  .download-copy { align-items: flex-start; }
  .download-copy img { width: 58px; height: 58px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
}