:root {
  color-scheme: dark;
  --bg: #08090d;
  --panel: #11131a;
  --panel-soft: #171a23;
  --text: #f4f1ed;
  --muted: #aaa8b2;
  --accent: #dc3b52;
  --accent-soft: rgba(220, 59, 82, 0.14);
  --line: rgba(255, 255, 255, 0.09);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 0%, rgba(220, 59, 82, 0.16), transparent 28rem),
    radial-gradient(circle at 90% 15%, rgba(88, 63, 150, 0.12), transparent 24rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a { color: inherit; }

.shell { width: min(1080px, calc(100% - 40px)); margin: 0 auto; }

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: 0.22em;
  text-decoration: none;
  text-transform: uppercase;
}

nav { display: flex; align-items: center; gap: 22px; }
nav a, footer a { color: var(--muted); text-decoration: none; }
nav a:hover, footer a:hover { color: var(--text); }

.language-menu {
  position: relative;
  margin-left: 6px;
}
.language-menu summary {
  display: flex;
  align-items: center;
  gap: 7px;
  min-width: 92px;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--text);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 800;
  list-style: none;
}
.language-menu summary::-webkit-details-marker { display: none; }
.language-menu summary::after { margin-left: auto; color: var(--muted); content: "▾"; }
.language-menu[open] summary::after { content: "▴"; }
.language-options {
  position: absolute;
  z-index: 20;
  top: calc(100% + 8px);
  right: 0;
  display: grid;
  width: 168px;
  overflow: hidden;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #151720;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.42);
}
.language-options a {
  display: grid;
  grid-template-columns: 28px 1fr;
  padding: 8px 9px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.82rem;
  text-decoration: none;
}
.language-options a:hover, .language-options a.active { background: var(--panel-soft); color: var(--text); }
.language-code { color: #ff7185; font-size: 0.7rem; font-weight: 900; }

.hero { padding: 108px 0 72px; }
.eyebrow { color: #ff7185; font-size: 0.78rem; font-weight: 800; letter-spacing: 0.16em; text-transform: uppercase; }
h1 { max-width: 820px; margin: 16px 0 24px; font-size: clamp(2.7rem, 7vw, 5.8rem); line-height: 0.98; letter-spacing: -0.055em; }
.lead { max-width: 700px; margin: 0; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.25rem); }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-soft);
  font-weight: 750;
  text-decoration: none;
}
.button.primary { border-color: var(--accent); background: var(--accent); }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding: 20px 0 88px; }
.card { min-height: 220px; padding: 28px; border: 1px solid var(--line); border-radius: 18px; background: rgba(17, 19, 26, 0.82); }
.card .number { color: #ff7185; font-size: 0.8rem; font-weight: 900; }
.card h2 { margin: 38px 0 10px; font-size: 1.35rem; }
.card p { margin: 0; color: var(--muted); }

.notice { margin-bottom: 88px; padding: 26px 28px; border: 1px solid rgba(220, 59, 82, 0.32); border-radius: 18px; background: var(--accent-soft); }
.notice h2 { margin: 0 0 8px; font-size: 1.1rem; }
.notice p { margin: 0; color: #d3cbd0; }

.demo-section { padding: 0 0 88px; }
.demo-heading { display: flex; justify-content: space-between; gap: 28px; align-items: end; margin-bottom: 28px; }
.demo-heading h2 { max-width: 580px; margin: 8px 0 0; font-size: clamp(2rem, 5vw, 3.6rem); line-height: 1.04; letter-spacing: -0.04em; }
.demo-heading p { max-width: 430px; margin: 0; color: var(--muted); }
.prototype-badge { display: inline-flex; padding: 5px 9px; border: 1px solid rgba(255, 113, 133, 0.42); border-radius: 999px; color: #ff8496; background: var(--accent-soft); font-size: 0.7rem; font-weight: 900; letter-spacing: 0.1em; text-transform: uppercase; }
.flow-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.flow-step { padding: 18px; border: 1px solid var(--line); border-radius: 20px; background: rgba(17, 19, 26, 0.78); }
.step-label { display: flex; gap: 10px; align-items: center; margin: 0 0 12px 2px; color: var(--muted); font-size: 0.82rem; font-weight: 800; }
.step-label span { display: grid; place-items: center; width: 25px; height: 25px; border-radius: 50%; color: white; background: var(--accent); font-size: 0.72rem; }
.mock-window { min-height: 300px; overflow: hidden; border: 1px solid #2b2e38; border-radius: 14px; background: #313338; box-shadow: 0 18px 45px rgba(0, 0, 0, 0.22); }
.mock-top { display: flex; align-items: center; gap: 8px; height: 38px; padding: 0 13px; border-bottom: 1px solid #24262b; color: #b5bac1; background: #2b2d31; font-size: 0.72rem; font-weight: 750; }
.mock-dot { width: 7px; height: 7px; border-radius: 50%; background: #80848e; }
.mock-body { padding: 18px; }
.mock-author { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.mock-avatar { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; color: white; background: linear-gradient(135deg, #ed3e58, #7f3044); font-weight: 950; }
.mock-name { color: #f2f3f5; font-size: 0.9rem; font-weight: 800; }
.bot-tag { margin-left: 5px; padding: 1px 4px; border-radius: 3px; color: white; background: #5865f2; font-size: 0.58rem; vertical-align: 2px; }
.mock-card { padding: 16px; border-left: 4px solid var(--accent); border-radius: 4px; background: #2b2d31; }
.mock-card.success { border-color: #3ba55d; }
.mock-title { margin: 0 0 7px; color: #f2f3f5; font-size: 1rem; font-weight: 850; }
.mock-copy { margin: 0; color: #c4c8cf; font-size: 0.79rem; line-height: 1.5; }
.mock-buttons { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.mock-button { display: inline-flex; align-items: center; min-height: 34px; padding: 0 12px; border-radius: 5px; color: white; background: #5865f2; font-size: 0.75rem; font-weight: 800; }
.mock-button.secondary { background: #4e5058; }
.mock-button.danger { background: #da373c; }
.mock-button.riot { background: #d6384e; }
.mock-private { margin-top: 10px; color: #969ba4; font-size: 0.68rem; }
.consent-list { display: grid; gap: 7px; margin-top: 12px; }
.consent-item { display: flex; gap: 8px; align-items: center; padding: 8px 10px; border-radius: 7px; color: #d9dce1; background: #232428; font-size: 0.73rem; }
.consent-check { color: #57f287; font-weight: 900; }
.identity { display: grid; gap: 8px; margin-top: 13px; }
.identity-row { display: flex; justify-content: space-between; gap: 12px; padding-bottom: 7px; border-bottom: 1px solid rgba(255,255,255,.07); color: #b5bac1; font-size: 0.73rem; }
.identity-row strong { color: #f2f3f5; text-align: right; }
.game-pills { display: flex; gap: 7px; margin-top: 12px; }
.game-pill { padding: 4px 8px; border-radius: 999px; color: #d8dbe0; background: #1e1f22; font-size: 0.67rem; font-weight: 800; }
.demo-note { margin-top: 18px; padding: 16px 18px; border: 1px dashed rgba(255,255,255,.16); border-radius: 12px; color: var(--muted); font-size: 0.84rem; }

.document { max-width: 820px; padding: 72px 0 96px; }
.document h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); }
.document h2 { margin-top: 42px; font-size: 1.35rem; }
.document p, .document li { color: var(--muted); }
.document strong { color: var(--text); }

footer { display: flex; justify-content: space-between; gap: 24px; padding: 28px 0 42px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }

@media (max-width: 760px) {
  .shell { width: min(100% - 28px, 1080px); }
  header { align-items: flex-start; flex-direction: column; justify-content: center; gap: 8px; padding: 16px 0; }
  nav { flex-wrap: wrap; gap: 12px; font-size: 0.86rem; }
  .language-menu { margin-left: 0; }
  .language-options { right: auto; left: 0; }
  .hero { padding: 72px 0 52px; }
  .grid { grid-template-columns: 1fr; padding-bottom: 64px; }
  .demo-heading { align-items: flex-start; flex-direction: column; }
  .flow-grid { grid-template-columns: 1fr; }
  .card { min-height: 170px; }
  .card h2 { margin-top: 24px; }
  footer { flex-direction: column; }
}