:root,
[data-theme="light"] {
  color-scheme: light;
  --bg: #f4f6f8;
  --bg-2: #ffffff;
  --ink: #171c24;
  --muted: #5d6774;
  --line: #d7dde5;
  --accent: #0e9a84;
  --accent-ink: #ffffff;
  --danger: #c23b44;
  --code-bg: #171c24;
  --code-ink: #d7e3ef;
  --radius: 14px;
  --font: "Segoe UI", system-ui, sans-serif;
  --display: "Palatino Linotype", Palatino, "Iowan Old Style", Georgia, serif;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #10141b;
  --bg-2: #171d27;
  --ink: #eef2f7;
  --muted: #8b97a8;
  --line: #2a3340;
  --accent: #3ee0c5;
  --accent-ink: #04231d;
  --danger: #f07178;
  --code-bg: #0b0f14;
  --code-ink: #d7e3ef;
}

* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  background-color: var(--bg);
}
body {
  margin: 0;
  font-family: var(--font);
  background-color: var(--bg);
  background-image: none;
  color: var(--ink);
  line-height: 1.5;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; }

.wrap { width: min(1100px, calc(100% - 32px)); margin-inline: auto; }
.muted { color: var(--muted); }
.error { color: var(--danger); }
.soon { color: var(--muted); font-size: 0.9rem; letter-spacing: 0.04em; text-transform: uppercase; }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 4vw;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  z-index: 10;
}
.nav-start { display: flex; align-items: center; gap: 10px; }
.brand { color: var(--ink); font-weight: 700; letter-spacing: 0.02em; text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: 18px; }
.nav-links a { display: flex; align-items: center; }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 8px; padding: 8px 10px; }
.nav-toggle::before { content: "Меню"; font-size: 0.85rem; }
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-2);
  color: var(--ink);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.theme-toggle:hover { border-color: var(--accent); }
.theme-icon { display: none; }
[data-theme="light"] .theme-icon-sun { display: block; }
[data-theme="dark"] .theme-icon-moon { display: block; }
.inline { display: inline; }
.linkish {
  background: none; border: 0; color: var(--accent); font: inherit; cursor: pointer; padding: 0;
}
.linkish:hover { text-decoration: underline; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent); color: var(--accent-ink);
  border: 0; border-radius: 999px; padding: 12px 20px;
  font-weight: 700; text-decoration: none; cursor: pointer;
}
.btn:hover { text-decoration: none; filter: brightness(1.05); }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn-sm { padding: 8px 14px; font-size: 0.9rem; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.hero { padding: 72px 0 40px; }
.hero .wrap { text-align: center; }
.hero h1 {
  font-family: var(--display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.15;
  font-weight: 600;
  margin: 0 auto 16px;
  max-width: 18ch;
}
.eyebrow { color: var(--accent); letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.78rem; margin: 0 0 12px; }
.lead { color: var(--muted); max-width: 42em; margin: 0 auto 28px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }

.section { padding: 56px 0; }
.section-muted { background: var(--bg-2); }
[data-theme="dark"] .section-muted { background: var(--bg); }
.section-title { font-family: var(--display); font-size: 2rem; margin: 0 auto 8px; text-align: center; }
.section-lead { color: var(--muted); margin: 0 auto 28px; max-width: 40em; text-align: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; text-align: center; }
.grid-3 h2 { font-size: 1.1rem; margin: 0 0 8px; }
.grid-3 p { margin: 0; color: var(--muted); }

.pricing { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.price-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--bg-2);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.price-card.featured { border-color: var(--accent); }
.price-card h3 { margin: 0; }
.price-limit { font-size: 1.4rem; margin: 0; }
.price-limit span { display: block; color: var(--muted); font-size: 0.8rem; }
.price-card ul { margin: 0; padding-left: 1.1em; color: var(--muted); flex: 1; }

.split { display: grid; grid-template-columns: 1fr 1.2fr; gap: 32px; align-items: start; }
.code {
  background: var(--code-bg);
  color: var(--code-ink);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  overflow: auto;
  font-size: 0.85rem;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.app .wrap {
  width: min(880px, calc(100% - 32px));
  margin-inline: auto;
  padding: 48px 0 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  flex: 1;
}
.app .wrap > * { width: 100%; }
.app .form {
  width: min(420px, 100%);
  margin-inline: auto;
  text-align: left;
}
.app .card,
.app .table,
.app .tabs,
.app .card-grid,
.app .banner,
.app .split { text-align: left; }
.app h1 { font-family: var(--display); font-size: 2rem; margin: 0 0 8px; }
.form { display: grid; gap: 12px; }
.form label { display: grid; gap: 6px; color: var(--muted); font-size: 0.9rem; }
.form input, .form select, .form textarea {
  background: var(--bg-2); color: var(--ink); border: 1px solid var(--line);
  border-radius: 10px; padding: 10px 12px; font: inherit;
}
.inline-form { display: flex; gap: 12px; align-items: end; max-width: none; }
.card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  margin: 16px 0;
}
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 20px 0; }
.usage { font-size: 1.8rem; margin: 8px 0; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); font-size: 0.95rem; }
.tabs { display: flex; gap: 16px; margin: 20px 0 8px; justify-content: center; }
.tabs a { color: var(--muted); }
.tabs a.active { color: var(--ink); border-bottom: 2px solid var(--accent); padding-bottom: 4px; }
.banner { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.banner-key { border-color: var(--accent); }
.key { display: block; margin-top: 8px; word-break: break-all; color: var(--accent); }
.footer { border-top: 1px solid var(--line); padding: 24px 0 40px; color: var(--muted); }
.footer-row { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }

/* ── Demo ── */
.demo-card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  max-width: 680px;
  margin: 0 auto;
  text-align: left;
}
.demo-card label { display: block; color: var(--muted); font-size: 0.85rem; margin: 16px 0 6px; }
.demo-card textarea,
.demo-card select {
  width: 100%;
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  font: inherit;
}
.demo-card textarea { min-height: 120px; resize: vertical; }
.demo-card .demo-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}
.demo-card .status {
  margin-top: 14px;
  color: var(--muted);
  min-height: 1.4em;
  font-size: 0.9rem;
}
.demo-card .status.error { color: var(--danger); }
.demo-card audio { width: 100%; margin-top: 16px; }
.demo-card button { margin-top: 20px; }

@media (max-width: 720px) {
  .demo-card .demo-row { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .grid-3, .pricing, .card-grid, .split { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    inset: 57px 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 16px 4vw 20px;
  }
  .nav-links.open { display: flex; }
}