@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  --bg: #0a0f0d;
  --surface: #111917;
  --surface-2: #16211e;
  --border: #1e2b27;
  --text: #e8f2ee;
  --muted: #8fa39c;
  --accent-1: #10d98e;
  --accent-2: #22d3ee;
  --danger: #f87171;
  --grad: linear-gradient(90deg, #10d98e, #22d3ee);
  --radius: 14px;
}

[data-theme="light"] {
  --bg: #f4f8f6;
  --surface: #ffffff;
  --surface-2: #eef3f1;
  --border: #d7e2dd;
  --text: #0a0f0d;
  --muted: #52625b;
  /* darker accents for readable text on light surfaces (a11y contrast) */
  --accent-1: #0b8f5c;
  --accent-2: #0891b2;
  --grad: linear-gradient(90deg, #0b8f5c, #0891b2);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

code, .mono { font-family: 'JetBrains Mono', ui-monospace, monospace; }

a { color: inherit; text-decoration: none; }

.container { width: min(1080px, 92%); margin: 0 auto; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 28px; padding: 16px 0; }
.logo {
  font-weight: 800; font-size: 20px;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.nav { display: flex; gap: 22px; flex: 1; }
.nav a { color: var(--muted); font-size: 14px; font-weight: 500; transition: color .2s; }
.nav a:hover, .nav a.active { color: var(--text); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.icon-btn {
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
  width: 36px; height: 36px; border-radius: 10px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700; transition: color .2s, border-color .2s;
}
.icon-btn:hover { color: var(--text); border-color: var(--accent-1); }

/* Buttons */
.btn-accent {
  background: var(--grad); color: #05130d;
  border: none; border-radius: 10px;
  padding: 10px 20px; font-weight: 700; font-size: 14px;
  cursor: pointer; font-family: inherit;
  transition: filter .2s, transform .1s;
}
.btn-accent:hover { filter: brightness(1.1); }
.btn-accent:active { transform: translateY(1px); }
.btn-accent:disabled { opacity: .55; cursor: wait; }

/* Sections */
main { flex: 1; padding: 64px 0 80px; }

/* Usage page */
.usage-hero { text-align: center; margin-bottom: 44px; }
.usage-hero h1 {
  font-size: clamp(30px, 5vw, 44px); font-weight: 800; letter-spacing: -0.02em;
}
.usage-hero h1 span {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.usage-hero p { color: var(--muted); margin-top: 10px; max-width: 560px; margin-inline: auto; }

.usage-form {
  max-width: 640px; margin: 0 auto 28px;
  display: flex; gap: 12px;
}
.usage-form input {
  flex: 1; background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 16px; color: var(--text);
  font-family: 'JetBrains Mono', monospace; font-size: 14px;
  outline: none; transition: border-color .2s;
}
.usage-form input:focus { border-color: var(--accent-1); }

.spinner {
  width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid rgba(0,0,0,.25); border-top-color: #05130d;
  display: inline-block; vertical-align: -3px; margin-right: 8px;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.usage-error {
  max-width: 640px; margin: 0 auto 28px; text-align: center;
  color: var(--danger); font-size: 14px; display: none;
}

.usage-result { max-width: 640px; margin: 0 auto; display: none; }
.usage-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
  animation: fadeUp .35s ease;
}
@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } }

.usage-card h2 { font-size: 17px; font-weight: 700; margin-bottom: 20px; }

.balance-value { font-size: 26px; font-weight: 800; }
.balance-value .total { color: var(--muted); font-size: 16px; font-weight: 500; }
.balance-sub { color: var(--muted); font-size: 13px; margin-bottom: 18px; }

.progress-track {
  height: 10px; background: var(--surface-2);
  border-radius: 999px; overflow: hidden; margin-bottom: 24px;
}
.progress-fill {
  height: 100%; width: 0; border-radius: 999px;
  background: var(--grad);
  transition: width .9s cubic-bezier(.2,.8,.2,1);
}

.usage-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.meta-item {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 10px; padding: 14px 16px;
}
.meta-item .label { color: var(--muted); font-size: 12px; margin-bottom: 4px; }
.meta-item .value { font-weight: 700; font-size: 15px; }
.meta-item .value.ok { color: var(--accent-1); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0; }
.footer-inner { display: flex; justify-content: space-between; color: var(--muted); font-size: 13px; flex-wrap: wrap; gap: 10px; }

/* ===== Models catalog page ===== */
.models-toolbar {
  display: flex; flex-wrap: wrap; gap: 12px;
  align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.currency-switch {
  display: inline-flex; background: var(--surface);
  border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
}
.currency-switch button {
  background: transparent; border: none; color: var(--muted);
  padding: 9px 18px; cursor: pointer;
  font: 700 14px 'Inter', sans-serif; transition: background .2s, color .2s;
}
.currency-switch button.active { background: var(--grad); color: #05130d; }

.search-wrap { position: relative; }
.search-wrap::before {
  content: '⌕'; position: absolute; left: 14px; top: 50%;
  transform: translateY(-50%); color: var(--muted); font-size: 16px; line-height: 1;
}
.search-wrap input {
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); border-radius: 10px;
  padding: 10px 14px 10px 36px;
  font: 400 14px 'Inter', sans-serif;
  width: 280px; outline: none; transition: border-color .2s;
}
.search-wrap input:focus { border-color: var(--accent-1); }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 34px; }
.chip {
  background: var(--surface); border: 1px solid var(--border);
  color: var(--muted); border-radius: 999px;
  padding: 7px 16px; cursor: pointer;
  font: 600 13px 'Inter', sans-serif;
  transition: color .2s, background .2s, border-color .2s;
}
.chip:hover { color: var(--text); }
.chip.active { background: var(--grad); color: #05130d; border-color: transparent; }

.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.model-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  display: flex; flex-direction: column; gap: 12px;
  transition: transform .2s, border-color .2s;
}
.model-card:hover { transform: translateY(-3px); border-color: var(--accent-1); }
.model-card .name {
  font: 600 15px 'JetBrains Mono', monospace;
  word-break: break-all;
}
.model-card .badges { display: flex; gap: 6px; flex-wrap: wrap; }
.badge {
  font: 700 11px 'Inter', sans-serif; text-transform: uppercase;
  letter-spacing: .04em; padding: 3px 10px; border-radius: 999px;
}
.badge.vendor { background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); }
.badge.online {
  background: color-mix(in srgb, var(--accent-1) 12%, transparent);
  color: var(--accent-1);
  border: 1px solid color-mix(in srgb, var(--accent-1) 30%, transparent);
}
.badge.tag {
  background: color-mix(in srgb, var(--accent-2) 10%, transparent);
  color: var(--accent-2);
  border: 1px solid color-mix(in srgb, var(--accent-2) 25%, transparent);
  text-transform: none; letter-spacing: 0;
}
.model-card .rate {
  margin-top: auto; padding-top: 4px;
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 13px; color: var(--muted);
}
.model-card .rate strong {
  font: 700 15px 'JetBrains Mono', monospace;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.empty-state {
  text-align: center; color: var(--muted);
  padding: 80px 0; font-size: 16px;
}

@media (max-width: 640px) {
  .usage-form { flex-direction: column; }
  .usage-meta { grid-template-columns: 1fr; }
  .nav { display: none; }
  .search-wrap { width: 100%; }
  .search-wrap input { width: 100%; }
}

/* ============================================================
   Shared showcase components (all pages)
   ============================================================ */

.badge--dot { display: inline-flex; align-items: center; gap: 8px; }
.badge--dot::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-1); box-shadow: 0 0 8px var(--accent-1);
}

/* ---------- Buttons (generic) ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: 12px;
  font-weight: 700; font-size: 15px; border: 1px solid transparent;
  cursor: pointer; font-family: inherit;
  transition: transform .15s ease, box-shadow .25s ease, border-color .25s ease, filter .2s;
}
.btn:active { transform: translateY(1px); }
.btn--accent {
  background: var(--grad); color: #06251a;
  box-shadow: 0 0 24px rgba(16, 217, 142, .25);
}
.btn--accent:hover { transform: translateY(-2px); box-shadow: 0 0 36px rgba(16, 217, 142, .45); }
.btn--ghost {
  background: var(--surface); border-color: var(--border-strong, #2b3b35); color: var(--text);
}
.btn--ghost:hover { border-color: var(--accent-1); box-shadow: 0 0 24px rgba(16, 217, 142, .2); }
.btn--sm { padding: 8px 16px; font-size: 13px; border-radius: 8px; }

/* ---------- Logo / header extras ---------- */
.logo-wrap { display: inline-flex; align-items: center; gap: 10px; }
.logo-mark {
  width: 28px; height: 28px; border-radius: 8px;
  background: var(--grad); display: grid; place-items: center;
  box-shadow: 0 0 16px rgba(16, 217, 142, .35); flex-shrink: 0;
  font: 700 14px 'JetBrains Mono', monospace; color: #06251a;
}
.lang-toggle { width: auto; padding: 0 12px; font: 700 12px 'JetBrains Mono', monospace; }

/* ---------- Hero ---------- */
.hero {
  text-align: center; position: relative; overflow: hidden;
  padding: 120px 24px 100px;
}
.hero::before {
  content: ''; position: absolute; inset: -40% 0 auto; height: 80%;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(16, 217, 142, .14), transparent 65%),
    radial-gradient(ellipse at 60% 0%, rgba(34, 211, 238, .10), transparent 60%);
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 880px; margin: 0 auto; }
.hero h1 {
  font-size: clamp(34px, 6vw, 64px); font-weight: 800;
  letter-spacing: -0.02em; margin-bottom: 20px;
}
.hero h1 .grad, .text-gradient {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub {
  font-size: clamp(17px, 2vw, 21px); color: var(--muted);
  max-width: 640px; margin: 0 auto 40px;
}
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; }
.hero-stat { text-align: center; }
.hero-stat .num {
  font: 700 26px 'JetBrains Mono', monospace;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-stat .cap { color: var(--muted); font-size: 13px; }

/* ---------- Section scaffolding ---------- */
.section { padding: 96px 24px; }
.section-head { max-width: 720px; margin: 0 auto 48px; text-align: center; }
.section-head h2 { font-size: clamp(26px, 3.5vw, 38px); font-weight: 800; margin-bottom: 12px; }
.section-sub { color: var(--muted); font-size: 17px; }
.section-sub .grad, .section-head .grad {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- Feature cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 28px;
  transition: border-color .25s, box-shadow .25s, transform .25s;
}
.card:hover { border-color: var(--accent-1); box-shadow: 0 0 24px rgba(16, 217, 142, .2); transform: translateY(-4px); }
.card-icon {
  width: 44px; height: 44px; border-radius: 8px;
  background: var(--surface-2); border: 1px solid var(--border);
  display: grid; place-items: center;
  margin-bottom: 18px; font-size: 20px; color: var(--accent-1);
}
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 15px; }

/* ---------- Code blocks (terminal, mac dots) ---------- */
.code-block {
  position: relative; background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
}
.code-block-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.mac-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.mac-dot--r { background: #ff5f57; }
.mac-dot--y { background: #febc2e; }
.mac-dot--g { background: #28c840; }
.code-lang {
  margin-left: 8px; font: 600 11px 'JetBrains Mono', monospace;
  color: var(--muted); text-transform: uppercase; letter-spacing: .08em;
}
.copy-btn {
  margin-left: auto; font: 700 11px 'JetBrains Mono', monospace;
  color: var(--muted); border: 1px solid var(--border); border-radius: 6px;
  padding: 3px 10px; cursor: pointer; background: transparent;
  transition: color .2s, border-color .2s;
}
.copy-btn:hover, .copy-btn.copied { color: var(--accent-1); border-color: var(--accent-1); }
.code-block pre {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13.5px; line-height: 1.7;
  padding: 20px; overflow-x: auto; color: var(--text);
}
.tok-key { color: var(--accent-2); }
.tok-str { color: var(--accent-1); }
.tok-cm  { color: var(--muted); }

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.tab-btn {
  font: 600 13px 'JetBrains Mono', monospace;
  padding: 8px 18px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--muted); cursor: pointer; transition: all .2s;
}
.tab-btn:hover { border-color: var(--accent-1); color: var(--text); }
.tab-btn.active {
  background: var(--grad); color: #06251a;
  border-color: transparent; box-shadow: 0 0 20px rgba(16, 217, 142, .3);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeUp .3s ease; }

/* ---------- Pricing table ---------- */
.price-table-wrap {
  border: 1px solid var(--border); border-radius: 12px;
  overflow: auto; background: var(--surface);
}
.price-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.price-table th, .price-table td {
  padding: 14px 18px; text-align: left;
  border-bottom: 1px solid var(--border); white-space: nowrap;
}
.price-table th {
  font: 600 11px 'JetBrains Mono', monospace;
  text-transform: uppercase; letter-spacing: .08em; color: var(--muted);
}
.price-table tbody tr:last-child td { border-bottom: none; }
.price-table tbody tr { transition: background .15s; }
.price-table tbody tr:hover { background: var(--surface-2); }
.price-table .price { font: 700 14px 'JetBrains Mono', monospace; color: var(--accent-1); }

/* ---------- Pricing cards ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px; align-items: stretch;
}
.pricing-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 32px;
  display: flex; flex-direction: column; position: relative;
}
.pricing-card--featured {
  border-color: var(--accent-1);
  box-shadow: 0 0 24px rgba(16, 217, 142, .25);
}
.pricing-card .badge { position: static; margin-bottom: 12px; }
.pricing-card h3 { font-size: 18px; font-weight: 700; }
.pricing-price { font: 700 36px 'JetBrains Mono', monospace; margin: 16px 0 4px; }
.pricing-price small { font: 500 14px 'Inter', sans-serif; color: var(--muted); }
.pricing-card .features { margin: 24px 0 28px; flex: 1; }
.pricing-card .features li {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 6px 0; color: var(--muted); font-size: 14px;
}
.pricing-card .features li::before {
  content: '✓'; color: var(--accent-1); font-weight: 700; flex-shrink: 0;
}
.pricing-card .btn { width: 100%; }

/* ---------- Model card rate (shared) ---------- */
.model-grid .model-card .name { font-weight: 600; }

/* Sticky-header offset for anchor links (#tariffs, #calc, ...) */
section[id] { scroll-margin-top: 80px; }

/* ---------- Savings calculator ---------- */
.calc {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 40px;
}
.calc-label {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 16px; flex-wrap: wrap; gap: 8px;
}
.calc-label .val { font: 700 18px 'JetBrains Mono', monospace; color: var(--accent-1); }
.calc-slider { position: relative; margin: 12px 0 32px; }
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 6px; border-radius: 3px;
  background: var(--surface-2); border: 1px solid var(--border);
  outline: none; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--grad); border: 2px solid var(--bg);
  box-shadow: 0 0 14px rgba(16, 217, 142, .5); cursor: grab;
}
input[type="range"]::-webkit-slider-thumb:active { cursor: grabbing; }
input[type="range"]::-moz-range-thumb {
  width: 20px; height: 20px; border-radius: 50%;
  background: #10d98e; border: 2px solid var(--bg);
  box-shadow: 0 0 14px rgba(16, 217, 142, .5); cursor: grab;
}
.calc-results {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px;
}
.calc-result {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 8px; padding: 20px;
}
.calc-result .label { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.calc-result .value { font: 700 22px 'JetBrains Mono', monospace; }
.calc-result--save { border-color: var(--accent-1); }
.calc-result--save .value {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- Onboarding steps ---------- */
.steps {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.step {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 28px;
}
.step-num {
  font: 700 13px 'JetBrains Mono', monospace;
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--grad); color: #06251a;
  margin-bottom: 16px; box-shadow: 0 0 16px rgba(16, 217, 142, .3);
}
.step h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 14px; }

/* ---------- Footer grid ---------- */
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 48px;
}
.footer-brand .logo-wrap { margin-bottom: 12px; }
.footer-brand p { color: var(--muted); font-size: 14px; max-width: 320px; }
.footer-col h4 {
  font: 600 11px 'JetBrains Mono', monospace;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--muted); margin-bottom: 16px;
}
.footer-col a { display: block; color: var(--muted); font-size: 14px; padding: 4px 0; transition: color .2s; }
.footer-col a:hover { color: var(--accent-1); }

/* ---------- Showcase responsive ---------- */
@media (max-width: 900px) {
  .section { padding: 64px 20px; }
  .hero { padding: 80px 20px 64px; }
  .hero-stats { gap: 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .calc { padding: 24px; }
  .calc-result .value { font-size: 18px; }
  .pricing-card { padding: 24px; }
  .card { padding: 20px; }
  .price-table th, .price-table td { padding: 10px; font-size: 12px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-cta .btn { width: 100%; }
}
@media (max-width: 375px) {
  .section { padding: 48px 16px; }
  .hero { padding: 56px 16px; }
  .price-table { font-size: 11px; }
}

/* ============================================================
   index.html compatibility layer (page agents' naming)
   ============================================================ */
.main-nav { display: flex; gap: 22px; flex: 1; }
.main-nav a { color: var(--muted); font-size: 14px; font-weight: 500; transition: color .2s; }
.main-nav a:hover { color: var(--text); }
.header-controls { display: flex; align-items: center; gap: 12px; }
.toggle-btn {
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
  width: 36px; height: 36px; border-radius: 10px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700; transition: color .2s, border-color .2s;
}
.toggle-btn:hover { color: var(--text); border-color: var(--accent-1); }

.btn-ghost {
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent-1); }
.btn-sm { padding: 8px 16px; font-size: 13px; border-radius: 8px; }
.btn-block { width: 100%; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: color-mix(in srgb, var(--accent-1) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent-1) 30%, transparent);
  color: var(--accent-1); border-radius: 999px;
  padding: 6px 16px; font: 600 13px 'Inter', sans-serif;
  margin-bottom: 24px;
}
.hero-badge::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-1); box-shadow: 0 0 8px var(--accent-1);
}
.hero-title {
  font-size: clamp(32px, 5.5vw, 56px); font-weight: 800;
  letter-spacing: -0.02em; line-height: 1.15; margin-bottom: 20px;
}
.hero-subtitle { color: var(--muted); font-size: 18px; max-width: 640px; margin: 0 auto 32px; }

.section-title { font-size: clamp(24px, 3.5vw, 36px); font-weight: 800; margin-bottom: 12px; }
.section-subtitle { color: var(--muted); font-size: 16px; margin-bottom: 40px; }
.section > .container { text-align: center; }
.section > .container .table-wrap { text-align: left; }

.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px;
}
.feature-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 24px; text-align: left;
  transition: transform .2s, border-color .2s;
}
.feature-card:hover { transform: translateY(-3px); border-color: var(--accent-1); }
.feature-icon { font-size: 26px; margin-bottom: 14px; }
.feature-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.feature-card p { color: var(--muted); font-size: 14px; }

.section-code .code-block { max-width: 640px; margin: 0 auto; text-align: left; }
.code-block-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 16px; border-bottom: 1px solid var(--border);
}
.code-block-title { font: 600 12px 'JetBrains Mono', monospace; color: var(--muted); }
.code-block-header .copy-btn {
  background: var(--surface-2); border: 1px solid var(--border); color: var(--muted);
  border-radius: 8px; padding: 5px 12px; font: 600 12px 'Inter', sans-serif;
  cursor: pointer; transition: color .2s, border-color .2s;
}
.code-block-header .copy-btn:hover, .code-block-header .copy-btn.copied {
  color: var(--accent-1); border-color: var(--accent-1);
}
.code-block pre { margin: 0; padding: 20px; overflow-x: auto; }
.code-block pre code { font: 400 13px 'JetBrains Mono', monospace; color: var(--text); }

.table-wrap { overflow-x: auto; }
.price-table .model-name { font: 600 14px 'JetBrains Mono', monospace; }
.price-table .price-vendor { color: var(--muted); }
.price-table .price-ours { color: var(--accent-1); font-weight: 700; }
.price-table .price-diff { font-weight: 700; }

.tariffs-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px;
}
.tariff-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px; position: relative; text-align: center;
  display: flex; flex-direction: column;
  transition: transform .2s, border-color .2s;
}
.tariff-card:hover { transform: translateY(-4px); border-color: var(--accent-1); }
.tariff-popular { border-color: var(--accent-1); box-shadow: 0 0 36px rgba(16, 217, 142, .15); }
.tariff-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--grad); color: #06251a;
  border-radius: 999px; padding: 4px 14px;
  font: 700 11px 'Inter', sans-serif; text-transform: uppercase; letter-spacing: .05em;
}
.tariff-name { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.tariff-price { font: 800 30px 'JetBrains Mono', monospace; margin-bottom: 12px; }
.tariff-popular .tariff-price {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.tariff-desc { color: var(--muted); font-size: 14px; margin-bottom: 24px; flex: 1; }

.calc-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 36px; text-align: left;
}
.calc-slider-row { margin-bottom: 28px; }
.calc-slider-row label { font: 600 13px 'Inter', sans-serif; color: var(--muted); }
.calc-slider-value { font: 700 22px 'JetBrains Mono', monospace; color: var(--accent-1); margin-top: 10px; }
.calc-result-accent { border-color: var(--accent-1); }
.calc-result-accent .calc-result-value {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.calc-result-label { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.calc-result-value { font: 700 22px 'JetBrains Mono', monospace; }

.steps-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px;
}
.step-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 28px; text-align: left;
}
.step-card .step-num {
  font: 700 13px 'JetBrains Mono', monospace;
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--grad); color: #06251a;
  margin-bottom: 16px; box-shadow: 0 0 16px rgba(16, 217, 142, .3);
}
.step-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.step-card p { color: var(--muted); font-size: 14px; }

.footer-nav { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-nav a { color: var(--muted); font-size: 13px; transition: color .2s; }
.footer-nav a:hover { color: var(--accent-1); }
.footer-note { color: var(--muted); font-size: 12px; width: 100%; }
.footer-inner { flex-direction: column; align-items: center; text-align: center; gap: 14px; }

@media (max-width: 640px) {
  .calc-box { padding: 24px; }
  .tariff-card { padding: 22px; }
  .main-nav { display: none; }
}

/* ===== models/usage polish ===== */
.models-count {
  color: var(--muted); font-size: 13px; margin-bottom: 18px;
}

/* ===== faq & reviews ===== */
.faq { max-width: 720px; margin-inline: auto; }
.faq details {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px 20px; margin-bottom: 12px;
}
.faq summary {
  cursor: pointer; font-weight: 600; font-size: 15px;
  list-style: none; display: flex; align-items: baseline; gap: 10px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: '▸'; color: var(--accent-1); font-size: 14px;
  display: inline-block; transition: transform .2s ease; flex: none;
}
.faq details[open] summary::before { transform: rotate(90deg); }
.faq p { color: var(--muted); font-size: 14px; padding-top: 10px; margin-top: 4px; }

.reviews-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px;
}
.review-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 28px; text-align: left;
}
.review-stars { color: var(--accent-1); font-size: 16px; letter-spacing: 2px; margin-bottom: 14px; }
.review-text { color: var(--text); font-size: 14px; line-height: 1.6; margin-bottom: 16px; }
.review-name { color: var(--muted); font-size: 13px; font-weight: 500; }

/* catalog expansion */
#tag-chips { margin-top: -22px; margin-bottom: 24px; }
#tag-chips .chip { padding: 5px 13px; font-size: 12px; }
.sort-row { display: flex; justify-content: center; margin-bottom: 20px; }
#sort-select {
  background: var(--surface); border: 1px solid var(--border);
  color: var(--muted); border-radius: 10px;
  padding: 7px 14px; cursor: pointer;
  font: 600 13px 'Inter', sans-serif;
  transition: color .2s, background .2s, border-color .2s;
}
#sort-select:hover { color: var(--text); }
#sort-select option { background: var(--surface); color: var(--text); }