/* ============================================================
   Gathos.review — shared design system
   Dark premium AI-tool aesthetic · no external dependencies
   Serif display + clean sans + mono accents (system fallbacks)
   ============================================================ */

:root {
  --bg: #0a0c10;
  --surface: #12151b;
  --surface2: #171b23;
  --border: #232a35;
  --ink: #eef2f7;
  --muted: #9aa5b5;
  --accent: #7c5cff;
  --accent2: #e14bff;
  --good: #2ecc71;
  --bad: #ff5f5f;
  --gold: #e8b93f;
  --serif: "Instrument Serif", "EB Garamond", Georgia, "Times New Roman", serif;
  --sans: "Plus Jakarta Sans", -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "Space Mono", "SF Mono", Menlo, Consolas, monospace;
  --radius: 14px;
  --maxw: 1100px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img, video, audio { max-width: 100%; }
a { color: var(--accent); }
a:hover { text-decoration: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }
.section { padding: 3.5rem 0; }
.section + .section { border-top: 1px solid var(--border); }
.section-tight { padding: 2.5rem 0; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 12, 16, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0.8rem 1.25rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brand { font-weight: 800; font-size: 1.1rem; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.brand .accent { background: linear-gradient(90deg, var(--accent), var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.main-nav ul { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 1.2rem; }
.main-nav a { color: var(--muted); text-decoration: none; font-weight: 600; font-size: 0.92rem; }
.main-nav a:hover { color: var(--ink); }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: 8px; font-size: 1.3rem; line-height: 1; padding: 0.35rem 0.6rem; cursor: pointer; color: var(--ink); }

/* ---------- Buttons / CTA ---------- */
.btn-cta {
  display: inline-block;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  color: #fff; text-decoration: none;
  font-weight: 700; font-size: 1.05rem;
  padding: 0.95rem 1.9rem; border-radius: 12px;
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.35);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(124, 92, 255, 0.45); color: #fff; }
.btn-cta--sm { padding: 0.5rem 1rem; font-size: 0.9rem; box-shadow: none; }
.btn-sub { display: block; color: var(--muted); font-size: 0.88rem; margin: 0.6rem 0 0; }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(60% 60% at 80% 10%, rgba(124, 92, 255, 0.16), transparent 60%),
    radial-gradient(50% 50% at 10% 30%, rgba(225, 75, 255, 0.10), transparent 60%),
    var(--bg);
  padding: 5rem 0 4rem;
  border-bottom: 1px solid var(--border);
}
.eyebrow {
  display: inline-block; background: var(--surface2); border: 1px solid var(--border);
  color: var(--muted); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; padding: 0.35rem 0.85rem; border-radius: 999px; margin: 0 0 1.2rem;
}
.hero h1 { font-family: var(--serif); font-weight: 500; font-size: clamp(2.4rem, 5.5vw, 3.8rem); line-height: 1.08; margin: 0 0 1.1rem; letter-spacing: -0.01em; }
.hero .lead { font-size: 1.18rem; color: var(--muted); max-width: 48rem; margin: 0 0 1.8rem; }
.hero .lead strong { color: var(--ink); }
.hero-cta-line { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }

/* ---------- Typography ---------- */
h2 { font-family: var(--serif); font-weight: 500; font-size: clamp(1.7rem, 3vw, 2.3rem); margin: 0 0 1.1rem; letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; margin: 0 0 0.6rem; }
.section-kicker { color: var(--accent); font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; margin: 0 0 0.6rem; }
.prose { max-width: 46rem; }
.prose p { margin: 0 0 1rem; }
.prose ul { padding-left: 1.2rem; }
.prose li { margin: 0.45rem 0; }
.note { color: var(--muted); font-size: 0.9rem; margin: 0.9rem 0 0; }
.accent-text { background: linear-gradient(90deg, var(--accent), var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- Cards / grids ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem;
}
.card h3 { display: flex; align-items: center; gap: 0.5rem; }
.card .card-icon { font-size: 1.4rem; }
.card ul { margin: 0; padding-left: 1.1rem; }
.card li { margin: 0.45rem 0; font-size: 0.98rem; color: var(--muted); }
.card li strong { color: var(--ink); }
.card-kicker { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }

/* ---------- Stats ---------- */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
.stat { text-align: center; padding: 1.5rem 1rem; }
.stat .num { font-family: var(--serif); font-size: 2.6rem; line-height: 1.1; background: linear-gradient(90deg, var(--accent), var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .lbl { color: var(--muted); font-size: 0.9rem; margin-top: 0.3rem; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 0.97rem; min-width: 560px; }
th, td { text-align: left; padding: 0.85rem 1.1rem; border-bottom: 1px solid var(--border); vertical-align: top; }
thead th { background: var(--surface2); color: var(--ink); font-weight: 700; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:nth-child(even) { background: rgba(255,255,255,0.015); }
th:first-child, td:first-child { font-weight: 600; color: var(--muted); }
td .yes { color: var(--good); font-weight: 700; }
td .no { color: var(--bad); }
td .partial { color: var(--gold); }

/* ---------- Price cards ---------- */
.price-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-bottom: 1rem; }
.price-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.8rem; position: relative;
}
.price-card.featured { border: 2px solid var(--accent); box-shadow: 0 0 40px rgba(124, 92, 255, 0.15); }
.price-card .plan-name { font-weight: 800; font-size: 1.1rem; margin: 0 0 0.4rem; }
.price-card .price { font-family: var(--serif); font-size: 3rem; font-weight: 500; line-height: 1.05; }
.price-card .price .unit { font-family: var(--sans); font-size: 1rem; color: var(--muted); font-weight: 600; }
.price-card .price-note { display: block; color: var(--muted); font-size: 0.9rem; margin: 0.2rem 0 1rem; }
.price-card ul { padding-left: 1.1rem; margin: 0 0 1.2rem; }
.price-card li { margin: 0.4rem 0; font-size: 0.97rem; }
.badge {
  display: inline-block; background: linear-gradient(90deg, var(--accent), var(--accent2));
  color: #fff; font-size: 0.75rem; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 0.28rem 0.7rem; border-radius: 999px; margin-bottom: 0.7rem;
}
.badge.limited { background: var(--gold); color: #141414; }

/* ---------- Callouts ---------- */
.callout { border-radius: var(--radius); padding: 1.3rem 1.5rem; margin: 1.5rem 0; }
.callout.good { background: rgba(46, 204, 113, 0.08); border-left: 4px solid var(--good); }
.callout.bad { background: rgba(255, 95, 95, 0.08); border-left: 4px solid var(--bad); }
.callout.info { background: rgba(124, 92, 255, 0.08); border-left: 4px solid var(--accent); }
.callout h3 { margin-top: 0; }
.callout p { margin: 0 0 0.8rem; }
.callout p:last-child { margin-bottom: 0; }

/* ---------- Real outputs gallery ---------- */
.real-output { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.1rem; }
.real-output img, .real-output video { border-radius: 10px; border: 1px solid var(--border); width: 100%; }
.real-output audio { width: 100%; margin-top: 0.5rem; }
.real-output .meta { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); margin: 0.6rem 0 0; }
.real-output .caption { font-size: 0.95rem; margin: 0.6rem 0 0; color: var(--ink); }
.out-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.before-after { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }

/* ---------- Score bars ---------- */
.score { margin-bottom: 1rem; }
.score .score-label { display: flex; justify-content: space-between; font-weight: 700; font-size: 0.95rem; margin-bottom: 0.3rem; }
.score .bar { height: 10px; background: var(--surface2); border-radius: 999px; overflow: hidden; }
.score .bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent2)); border-radius: 999px; }

/* ---------- FAQ ---------- */
details {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.1rem 1.4rem; margin-bottom: 0.8rem;
}
summary { cursor: pointer; font-weight: 700; }
details p { margin: 0.8rem 0 0; color: var(--muted); }

/* ---------- Calculator ---------- */
.calculator {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.6rem;
}
.calculator label { display: block; font-weight: 700; font-size: 0.92rem; margin: 1rem 0 0.35rem; }
.calculator input[type="range"] { width: 100%; accent-color: var(--accent); }
.calculator .val { font-family: var(--mono); color: var(--accent); }
.calc-results { margin-top: 1.2rem; padding-top: 1rem; border-top: 1px solid var(--border); }
.calc-results p { margin: 0.35rem 0; }
.calc-results .saved { color: var(--good); font-weight: 800; }

/* ---------- Footer ---------- */
.site-footer { background: var(--surface); border-top: 1px solid var(--border); margin-top: 3rem; padding: 2.2rem 0 2.5rem; }
.footer-inner { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }
.disclosure {
  background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1rem 1.2rem; font-size: 0.88rem; color: var(--muted); max-width: 52rem;
}
.footer-nav { margin: 1.2rem 0 0.4rem; font-size: 0.92rem; }
.footer-nav a { color: var(--muted); text-decoration: none; }
.footer-nav a:hover { color: var(--accent); }
.footer-copy { color: var(--muted); font-size: 0.85rem; margin: 0.6rem 0 0; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .grid-4, .stats-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .grid-2, .price-grid, .out-grid, .before-after { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  .main-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--surface); border-bottom: 1px solid var(--border);
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; align-items: stretch; gap: 0; padding: 0.5rem 1.25rem 1rem; }
  .main-nav li { border-bottom: 1px solid var(--border); }
  .main-nav li:last-child { border-bottom: none; }
  .main-nav a { display: block; padding: 0.7rem 0; }
  .hero { padding: 3.2rem 0 2.8rem; }
  .section { padding: 2.5rem 0; }
}