/* Yello Messenger website — same palette as the app (dark ink, gold smiley, purple accents). */
:root {
  --bg: #14121d;
  --bg-2: #1b1827;
  --card: #201c2e;
  --card-2: #27223a;
  --line: rgba(255, 255, 255, .08);
  --text: #f4f1fa;
  --muted: rgba(244, 241, 250, .62);
  --faint: rgba(244, 241, 250, .4);
  --gold: #f5cf62;
  --gold-2: #ffd84d;
  --gold-ink: #281d35;
  --purple: #7f52c7;
  --purple-2: #b998ff;
  --green: #4ade80;
  --radius: 18px;
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--gold); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { font-family: Poppins, Inter, sans-serif; line-height: 1.15; margin: 0; letter-spacing: -.01em; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); }

/* Header */
.site-head {
  position: sticky; top: 0; z-index: 20;
  background: rgba(20, 18, 29, .82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-head .wrap { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font: 600 18px Poppins, sans-serif; }
.brand:hover { text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 9px; }
.brand b { color: var(--gold); font-weight: 600; }
.nav { display: flex; gap: 22px; margin-left: auto; font-size: 14px; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--text); text-decoration: none; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border-radius: 12px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn-gold { background: linear-gradient(135deg, var(--gold-2), var(--gold)); color: var(--gold-ink); box-shadow: 0 8px 28px rgba(245, 207, 98, .22); }
.btn-gold:hover { filter: brightness(1.05); }
.btn-ghost { background: rgba(255, 255, 255, .05); border-color: var(--line); color: var(--text); }
.btn-ghost:hover { background: rgba(255, 255, 255, .09); }
.btn-sm { padding: 8px 14px; font-size: 14px; border-radius: 10px; }
.btn svg { width: 18px; height: 18px; flex: none; }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 72px 0 56px; }
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto; height: 520px; pointer-events: none;
  background: radial-gradient(600px 300px at 20% 30%, rgba(127, 82, 199, .32), transparent 70%),
              radial-gradient(500px 260px at 85% 20%, rgba(245, 207, 98, .16), transparent 70%);
}
.hero .wrap { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px;
  background: rgba(127, 82, 199, .16); border: 1px solid rgba(185, 152, 255, .25);
  color: var(--purple-2); font-size: 13px; font-weight: 600;
}
.eyebrow i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(74, 222, 128, .15); }
.hero h1 { font-size: clamp(36px, 5.4vw, 60px); margin: 18px 0 16px; }
.hero h1 span { color: var(--gold); }
.hero p.lead { font-size: 18px; color: var(--muted); max-width: 520px; margin: 0 0 28px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-note { margin-top: 16px; font-size: 13px; color: var(--faint); }

/* App preview (drawn in HTML) */
.preview { position: relative; height: 440px; }
.win {
  position: absolute; background: var(--bg-2); border: 1px solid var(--line); border-radius: 16px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .5); overflow: hidden;
}
.win-bar { display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-bottom: 1px solid var(--line); font-size: 12px; font-weight: 600; }
.win-bar img { width: 20px; height: 20px; border-radius: 6px; }
.win-bar .dot { margin-left: auto; color: var(--green); font-size: 10px; letter-spacing: .12em; }
.win-room { left: 0; top: 0; width: 76%; }
.win-messenger { right: 0; top: 96px; width: 44%; max-width: 240px; }
.me { display: flex; align-items: center; gap: 10px; padding: 12px; border-bottom: 1px solid var(--line); }
.ava { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; font: 700 12px Inter, sans-serif; color: #1c1530; flex: none; position: relative; }
.ava.s { width: 26px; height: 26px; font-size: 10px; }
.ava::after { content: ""; position: absolute; right: -1px; bottom: -1px; width: 9px; height: 9px; border-radius: 50%; background: var(--green); border: 2px solid var(--bg-2); }
.ava.away::after { background: #fbbf24; }
.ava.off::after { display: none; }
.me b { display: block; font-size: 13px; }
.me small { color: var(--green); font-size: 11px; }
.group { padding: 8px 12px 2px; font-size: 10px; letter-spacing: .14em; color: var(--faint); text-transform: uppercase; }
.buddy { display: flex; align-items: center; gap: 9px; padding: 6px 12px; font-size: 12.5px; }
.buddy small { display: block; color: var(--faint); font-size: 10.5px; }
.win-foot { display: flex; gap: 6px; padding: 10px; border-top: 1px solid var(--line); }
.win-foot span { flex: 1; text-align: center; padding: 7px; border-radius: 9px; font-size: 11px; font-weight: 600; background: rgba(255, 255, 255, .05); }
.win-foot span.gold { background: linear-gradient(135deg, var(--gold-2), var(--gold)); color: var(--gold-ink); }
.room-head { padding: 12px 14px; border-bottom: 1px solid var(--line); }
.room-head b { font-size: 14px; }
.room-head small { display: block; color: var(--faint); font-size: 11px; }
.msg { display: flex; gap: 9px; padding: 8px 14px; }
.msg .who { font-size: 11.5px; font-weight: 600; }
.msg .who em { font-style: normal; color: var(--faint); font-weight: 400; margin-left: 6px; font-family: ui-monospace, monospace; font-size: 10px; }
.bubble { display: inline-block; margin-top: 3px; padding: 7px 11px; border-radius: 4px 12px 12px 12px; background: var(--card-2); font-size: 12.5px; }
.react { display: inline-flex; gap: 4px; margin-top: 5px; padding: 1px 8px; border-radius: 999px; background: rgba(255, 255, 255, .06); font-size: 11px; }
.composer { display: flex; align-items: center; gap: 8px; margin: 8px 12px 12px; padding: 9px 10px; border-radius: 12px; background: rgba(0, 0, 0, .25); border: 1px solid var(--line); font-size: 11.5px; color: var(--faint); }
.composer .talk { padding: 5px 9px; border-radius: 8px; background: linear-gradient(135deg, var(--gold-2), var(--gold)); color: var(--gold-ink); font-weight: 700; font-size: 10.5px; }
.call-chip {
  position: absolute; left: 24px; bottom: 0; display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: 14px; background: var(--card); border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .45); font-size: 12.5px;
}
.call-chip i { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: rgba(74, 222, 128, .15); color: var(--green); font-style: normal; }

/* Sections */
section { padding: 72px 0; scroll-margin-top: 56px; }
.section-head { max-width: 640px; margin-bottom: 36px; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 40px); margin-bottom: 10px; }
.section-head p { color: var(--muted); margin: 0; }
.alt { background: linear-gradient(180deg, transparent, rgba(127, 82, 199, .06) 30%, transparent); }

/* Download cards */
.downloads { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.dl {
  display: flex; flex-direction: column; gap: 12px; padding: 22px; border-radius: var(--radius);
  background: var(--card); border: 1px solid var(--line); position: relative;
}
.dl.recommended { border-color: rgba(245, 207, 98, .55); box-shadow: 0 0 0 1px rgba(245, 207, 98, .25), 0 20px 50px rgba(0, 0, 0, .3); }
.dl .tag {
  position: absolute; top: -11px; left: 22px; padding: 3px 10px; border-radius: 999px; font-size: 11px; font-weight: 700;
  background: var(--gold); color: var(--gold-ink); display: none;
}
.dl.recommended .tag { display: block; }
.dl-icon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: rgba(255, 255, 255, .06); color: var(--gold); }
.dl-icon svg { width: 24px; height: 24px; }
.dl h3 { font-size: 19px; }
.dl p { margin: 0; color: var(--muted); font-size: 14px; flex: 1; }
.dl .btns { display: flex; flex-direction: column; gap: 8px; }
.dl .small { font-size: 12px; color: var(--faint); }

/* Install guides */
.guides { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px; }
.guide { padding: 22px; border-radius: var(--radius); background: var(--bg-2); border: 1px solid var(--line); scroll-margin-top: 90px; }
.guide h3 { font-size: 17px; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.guide ol { margin: 0; padding-left: 20px; color: var(--muted); font-size: 14px; }
.guide li { margin: 6px 0; }
.guide li b { color: var(--text); font-weight: 600; }

/* Features */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature { padding: 24px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); }
.feature .fi { width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center; background: rgba(127, 82, 199, .18); color: var(--purple-2); margin-bottom: 14px; }
.feature .fi svg { width: 21px; height: 21px; }
.feature h3 { font-size: 17px; margin-bottom: 6px; }
.feature p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* Rooms */
.rooms { display: flex; flex-wrap: wrap; gap: 10px; }
.room {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 999px;
  background: rgba(255, 255, 255, .05); border: 1px solid var(--line); font-size: 14px; color: var(--text);
}
.room::before { content: "#"; color: var(--faint); }
.room.hot { border-color: rgba(245, 207, 98, .4); }
.rooms-label { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--faint); margin: 22px 0 10px; }

/* FAQ */
.faq { max-width: 800px; }
.faq details { border-bottom: 1px solid var(--line); padding: 16px 0; }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--gold); font-size: 20px; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--muted); margin: 10px 0 0; }

/* CTA band */
.band { text-align: center; padding: 64px 20px; border-radius: 24px; background: linear-gradient(135deg, rgba(127, 82, 199, .28), rgba(245, 207, 98, .12)); border: 1px solid var(--line); }
.band h2 { font-size: clamp(26px, 3.4vw, 38px); margin-bottom: 10px; }
.band p { color: var(--muted); margin: 0 0 24px; }

/* Footer */
.site-foot { border-top: 1px solid var(--line); padding: 40px 0; margin-top: 40px; font-size: 14px; color: var(--muted); }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 24px; align-items: center; justify-content: space-between; }
.site-foot nav { display: flex; flex-wrap: wrap; gap: 20px; }
.site-foot nav a { color: var(--muted); }

/* Legal / text pages */
.doc { max-width: 820px; padding: 56px 20px 24px; margin: 0 auto; }
.doc h1 { font-size: clamp(32px, 4.4vw, 44px); margin-bottom: 8px; }
.doc .updated { color: var(--faint); font-size: 14px; margin-bottom: 32px; }
.doc h2 { font-size: 22px; margin: 36px 0 10px; }
.doc h3 { font-size: 17px; margin: 22px 0 6px; }
.doc p, .doc li { color: var(--muted); }
.doc strong { color: var(--text); }
.doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 14.5px; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--line); color: var(--muted); }
.doc th { color: var(--text); font-weight: 600; }
.doc .card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; margin: 16px 0; }
.doc .card p { margin: 4px 0; }
.toc { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 8px; }
.toc a { font-size: 13px; padding: 5px 11px; border-radius: 999px; background: rgba(255, 255, 255, .05); border: 1px solid var(--line); color: var(--muted); }

/* Responsive */
@media (max-width: 980px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .preview { height: 420px; max-width: 560px; width: 100%; margin: 0 auto; }
  .downloads { grid-template-columns: repeat(2, 1fr); }
  .guides, .features { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav { display: none; }
  .site-head .btn { margin-left: auto; }
  .hero { padding: 44px 0 32px; }
  .hero p.lead { font-size: 16.5px; }
  .hero-ctas .btn { flex: 1 1 100%; }
  .preview { height: 380px; }
  .win-room { width: 84%; }
  .win-messenger { width: 52%; top: 120px; }
  .call-chip { left: 8px; }
  .composer { font-size: 10.5px; }
  .downloads, .guides, .features { grid-template-columns: 1fr; }
  section { padding: 52px 0; }
  .site-foot .wrap { flex-direction: column; align-items: flex-start; }
}