/* Лендинг Omnicard AI (ЭТАП 3): mobile-first, без внешних зависимостей.
   Тёмная тема по умолчанию (как legal-статика), светлая — prefers-color-scheme. */

:root {
  --bg: #0a0a2e;
  --bg-soft: #141433;
  --card: #141433;
  --border: #2a2a55;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #8b7cf6;
  --accent-strong: #7c6cf4;
  --accent-soft: rgba(139, 124, 246, 0.12);
  --danger: #f87171;
  --success: #34d399;
  --radius: 16px;
  --max-w: 960px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f7fb;
    --bg-soft: #ffffff;
    --card: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --muted: #64748b;
    --accent-soft: rgba(124, 108, 244, 0.1);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background:
    radial-gradient(ellipse at 30% 0%, #1a0a3e 0%, transparent 55%),
    radial-gradient(ellipse at 80% 100%, #0a1628 0%, transparent 55%),
    var(--bg);
  background-attachment: fixed;
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-color-scheme: light) {
  body { background: var(--bg); }
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 16px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 8px 16px;
  border-radius: 0 0 12px 0;
  z-index: 100;
}

.skip-link:focus { left: 0; }

/* Шапка */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  margin-right: auto;
}

.brand-logo { border-radius: 8px; display: block; }

.nav-links { display: none; gap: 16px; }

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

.nav-links a:hover { color: var(--text); }

/* Кнопки */
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #6366f1 100%);
  color: #fff;
  box-shadow: 0 8px 24px rgba(139, 124, 246, 0.35);
}

.btn-primary:disabled { opacity: 0.6; cursor: wait; }

.btn-secondary {
  background: var(--accent-soft);
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost {
  padding: 8px 16px;
  font-size: 14px;
  color: var(--text);
  border-color: var(--border);
  background: transparent;
}

/* Hero */
.hero { padding: 56px 16px 40px; text-align: center; }

.hero-inner { max-width: 720px; margin: 0 auto; }

.hero h1 {
  font-size: 30px;
  line-height: 1.2;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}

.hero-sub { color: var(--muted); font-size: 17px; margin: 0 0 24px; }

.hero-cta { display: flex; flex-direction: column; gap: 12px; }

.hero-note { color: var(--muted); font-size: 13px; margin: 16px 0 0; }

/* Секции */
section { padding: 36px 0; }

section h2 { font-size: 24px; margin: 0 0 8px; }

.section-sub { color: var(--muted); margin: 0 0 20px; }

/* Форма пробной генерации */
.trial form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
}

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }

.field-label { font-size: 14px; font-weight: 600; }

.field select,
.field textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  width: 100%;
}

.field textarea { resize: vertical; min-height: 120px; }

/* Honeypot: скрыт от людей и скринридеров (aria-hidden в разметке). */
.hp { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; }

.form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.counter { color: var(--muted); font-size: 13px; }

.form-status { font-size: 14px; margin: 12px 0 0; min-height: 1.4em; }

.form-status[data-tone="error"] { color: var(--danger); }
.form-status[data-tone="ok"] { color: var(--success); }
.form-status[data-tone="info"] { color: var(--muted); }

/* Форма бесплатного аудита (ЭТАП 4): те же карточки, что у trial. */
.audit form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
}

.audit .field input[type="text"] {
  font: inherit;
  color: var(--text);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  width: 100%;
}

/* Результат пробной генерации */
.trial-result {
  margin-top: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
}

.trial-result h3 { margin: 0 0 8px; font-size: 18px; }
.trial-result h4 { margin: 16px 0 4px; font-size: 14px; color: var(--muted); }
.trial-result p { margin: 0; white-space: pre-wrap; }

.result-cta { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }

/* Результат бесплатного аудита (ЭТАП 4) */
.audit-result {
  margin-top: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
}

.audit-result h3 { margin: 0 0 8px; font-size: 18px; }
.audit-result h4 { margin: 16px 0 8px; font-size: 14px; color: var(--muted); }
.audit-card-name { margin: 0; font-weight: 600; }
.audit-card-meta { margin: 4px 0 0; color: var(--muted); font-size: 13px; }

.audit-score { margin-top: 16px; }
.audit-score-head { display: flex; align-items: baseline; gap: 12px; }
.audit-score-value { font-size: 28px; font-weight: 800; }
.audit-score-badge {
  font-size: 12px;
  font-weight: 700;
  border-radius: 999px;
  padding: 2px 10px;
  background: var(--accent-soft);
  color: var(--accent);
}
.audit-score-badge[data-label="good"] { color: var(--success); }
.audit-score-badge[data-label="average"] { color: var(--accent); }
.audit-score-badge[data-label="poor"] { color: var(--danger); }

.audit-score-track {
  margin-top: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
}
.audit-score-bar { height: 100%; width: 0; background: var(--accent); transition: width 0.4s ease; }
.audit-score-bar[data-label="good"] { background: var(--success); }
.audit-score-bar[data-label="poor"] { background: var(--danger); }

.audit-weak-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.audit-weak-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  background: var(--bg-soft);
}
.audit-weak-title { margin: 0; font-weight: 600; font-size: 15px; }
.audit-weak-detail { margin: 6px 0 0; color: var(--muted); font-size: 14px; }
.audit-sev {
  font-size: 11px;
  font-weight: 700;
  border-radius: 999px;
  padding: 1px 8px;
  background: var(--accent-soft);
  color: var(--muted);
  white-space: nowrap;
}
.audit-weak-item[data-severity="high"] .audit-sev { color: var(--danger); }
.audit-weak-item[data-severity="medium"] .audit-sev { color: var(--accent); }
.audit-weak-empty { color: var(--success); font-size: 14px; margin: 0; }

/* Шаги / преимущества / тарифы */
.steps-list,
.features-list,
.pricing-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.steps-list { counter-reset: step; }

.steps-list li,
.features-list li,
.price-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 16px;
}

.steps-list li { counter-increment: step; }

.steps-list li::before {
  content: "Шаг " counter(step);
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 8px;
}

.steps-list h3,
.features-list h3,
.price-card h3 { margin: 0 0 6px; font-size: 17px; }

.steps-list p,
.features-list p,
.price-card p { margin: 0; color: var(--muted); font-size: 14px; }

.price { font-size: 26px; font-weight: 800; color: var(--text); }
.tokens { font-weight: 700; color: var(--text); }

.price-card-featured { border-color: var(--accent); }

.pricing-cta { margin-top: 20px; text-align: center; }

/* FAQ */
.faq details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  margin: 10px 0;
}

.faq summary { font-weight: 600; cursor: pointer; }
.faq details p { color: var(--muted); font-size: 14px; margin: 8px 0 0; }

/* Футер */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 32px;
  margin-top: 12px;
}

.footer-inner nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.footer-inner nav a { color: var(--muted); font-size: 14px; text-decoration: none; }
.footer-inner nav a:hover { color: var(--text); }

.footer-copy { color: var(--muted); font-size: 12px; margin: 12px 0 0; }

/* Десктоп */
@media (min-width: 720px) {
  .nav-links { display: flex; }
  .hero { padding: 88px 16px 64px; }
  .hero h1 { font-size: 44px; }
  .hero-cta { flex-direction: row; justify-content: center; }
  .steps-list,
  .features-list { grid-template-columns: 1fr 1fr; }
  .pricing-list { grid-template-columns: 1fr 1fr 1fr; }
  .result-cta { flex-direction: row; }
  .trial form,
  .trial-result,
  .audit form,
  .audit-result { padding: 24px; }
}