/* Friends Talk — shared design tokens and marketing-site styles. */

:root {
  color-scheme: dark;

  --bg: #070b14;
  --bg-raised: #0d1424;
  --bg-card: #111a2d;
  --border: #1e2b45;
  --border-bright: #2c3d5e;

  --text: #e8eefc;
  --text-dim: #93a3c2;
  --text-faint: #64748b;

  --accent: #35e0d0;
  --accent-2: #5b8dff;
  --accent-glow: rgba(53, 224, 208, 0.28);
  --danger: #ff5f6d;
  --warn: #ffb648;
  --ok: #4ade80;

  --radius: 14px;
  --radius-lg: 22px;
  --maxw: 1120px;

  --font: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

body {
  background-image:
    radial-gradient(900px 500px at 12% -10%, rgba(91, 141, 255, 0.16), transparent 60%),
    radial-gradient(800px 480px at 88% 0%, rgba(53, 224, 208, 0.12), transparent 55%);
  background-repeat: no-repeat;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ------------------------------------------------------------------ header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(7, 11, 20, 0.78);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 18px;
  height: 66px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.12rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.brand:hover { text-decoration: none; }
.brand .mark { width: 30px; height: 30px; }

.nav { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav a { color: var(--text-dim); font-size: 0.94rem; font-weight: 500; }
.nav a:hover { color: var(--text); text-decoration: none; }

/* ------------------------------------------------------------------ button */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 26px;
  border: 0;
  border-radius: 999px;
  font: inherit;
  font-weight: 650;
  font-size: 0.98rem;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121a;
  box-shadow: 0 10px 30px -10px var(--accent-glow);
}
.btn-primary:hover { box-shadow: 0 16px 40px -12px var(--accent-glow); }

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border: 1px solid var(--border-bright);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); }

.btn-sm { padding: 9px 18px; font-size: 0.88rem; }

/* -------------------------------------------------------------------- hero */

.hero { padding: 86px 0 66px; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--border-bright);
  border-radius: 999px;
  background: rgba(53, 224, 208, 0.07);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 22px auto 0;
  max-width: 15ch;
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  font-weight: 750;
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.lede {
  margin: 20px auto 0;
  max-width: 60ch;
  font-size: 1.13rem;
  line-height: 1.65;
  color: var(--text-dim);
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 34px;
}

.hero-note {
  margin-top: 18px;
  font-size: 0.86rem;
  color: var(--text-faint);
}

/* ------------------------------------------------------------------- stats */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin: 56px 0;
}

.stat {
  padding: 24px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  text-align: center;
}
.stat .num {
  font-size: 1.9rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  color: var(--accent);
}
.stat .label {
  margin-top: 6px;
  font-size: 0.84rem;
  color: var(--text-dim);
}

/* ---------------------------------------------------------------- sections */

.section { padding: 62px 0; }

.section-head { text-align: center; margin-bottom: 44px; }
.section-head h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  letter-spacing: -0.03em;
  font-weight: 720;
}
.section-head p {
  margin: 12px auto 0;
  max-width: 56ch;
  color: var(--text-dim);
  line-height: 1.6;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(268px, 1fr));
  gap: 18px;
}

.card {
  padding: 26px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--bg-card), var(--bg-raised));
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: var(--border-bright); transform: translateY(-2px); }

.card .icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: rgba(53, 224, 208, 0.1);
  color: var(--accent);
  margin-bottom: 16px;
}
.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}
.card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.94rem;
  line-height: 1.62;
}

/* --------------------------------------------------------------- how it works */

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 26px 22px 22px;
  border: 1px dashed var(--border-bright);
  border-radius: var(--radius);
}
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: -15px;
  left: 22px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
}
.step h4 { margin: 6px 0 8px; font-size: 1rem; }
.step p { margin: 0; color: var(--text-dim); font-size: 0.92rem; line-height: 1.6; }

/* --------------------------------------------------------------------- faq */

.faq { max-width: 780px; margin: 0 auto; }
.faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq summary {
  padding: 18px 20px;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '+';
  color: var(--accent);
  font-size: 1.3rem;
  line-height: 1;
  flex-shrink: 0;
}
.faq details[open] summary::after { content: '−'; }
.faq details p {
  margin: 0;
  padding: 0 20px 18px;
  color: var(--text-dim);
  line-height: 1.68;
  font-size: 0.95rem;
}

/* ------------------------------------------------------------------- table */

.table-scroll { overflow-x: auto; }
table.compare {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 0.94rem;
}
table.compare th, table.compare td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
table.compare th { color: var(--text); font-weight: 650; }
table.compare td { color: var(--text-dim); }
table.compare .yes { color: var(--ok); font-weight: 600; }
table.compare .no { color: var(--text-faint); }

/* ------------------------------------------------------------------- prose */

.prose { max-width: 760px; margin: 0 auto; padding: 48px 0 72px; }
.prose h1 { font-size: 2.2rem; letter-spacing: -0.03em; margin-bottom: 6px; }
.prose .updated { color: var(--text-faint); font-size: 0.88rem; margin-bottom: 34px; }
.prose h2 {
  margin-top: 38px;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.prose p, .prose li { color: var(--text-dim); line-height: 1.75; font-size: 0.97rem; }
.prose strong { color: var(--text); }
.prose ul { padding-left: 20px; }

/* -------------------------------------------------------------------- cta */

.cta {
  margin: 30px 0 70px;
  padding: 54px 32px;
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(600px 220px at 50% 0%, rgba(53, 224, 208, 0.14), transparent 70%),
    var(--bg-card);
  text-align: center;
}
.cta h2 { margin: 0 0 12px; font-size: 1.9rem; letter-spacing: -0.03em; }
.cta p { margin: 0 auto 26px; max-width: 50ch; color: var(--text-dim); line-height: 1.6; }

/* ------------------------------------------------------------------ footer */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0 60px;
  color: var(--text-faint);
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 26px;
  margin-bottom: 30px;
}
.footer-grid h5 {
  margin: 0 0 12px;
  color: var(--text);
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.footer-grid a { display: block; color: var(--text-dim); margin-bottom: 9px; }
.footer-bottom {
  padding-top: 22px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .nav { gap: 14px; }
  .nav a.hide-sm { display: none; }
  .hero { padding: 56px 0 42px; }
}