:root {
  --bg: #0A0E1A;
  --bg-raised: #0F1420;
  --bg-elev: #141a2a;
  --border: #1f2940;
  --border-strong: #2a3a5c;
  --text: #E8EAED;
  --text-dim: #9098a8;
  --text-faint: #8b93a8;
  --accent: #4ECDC4;
  --accent-ink: #0A0E1A;
  --warn: #FFB86B;
  --good: #50FA7B;
  --bad: #ff6b6b;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: var(--font-sans); font-feature-settings: "cv11", "ss01"; -webkit-font-smoothing: antialiased; }
body { min-height: 100vh; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font-family: inherit; }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* --- Top bar --- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 32px;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px); z-index: 20;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -0.01em; }
.brand-mark {
  width: 22px; height: 22px; border-radius: 5px;
  background: var(--accent); color: var(--accent-ink);
  display: grid; place-items: center; font-family: var(--font-mono); font-weight: 700; font-size: 12px;
}
.brand-name { font-size: 15px; }
.topbar-links { display: flex; align-items: center; gap: 22px; }
.topbar-links a { color: var(--text-dim); font-size: 13px; }
.topbar-links a:hover { color: var(--text); text-decoration: none; }

/* --- Layout --- */
.page { max-width: 1280px; margin: 0 auto; padding: 48px 32px 120px; }

/* --- Hero --- */
.hero { margin-bottom: 40px; text-align: center; max-width: 780px; margin-left: auto; margin-right: auto; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-dim); padding: 5px 10px; border: 1px solid var(--border); border-radius: 999px;
  margin-bottom: 20px;
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--good); box-shadow: 0 0 8px var(--good); }
h1.hero-title { font-size: 40px; line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 14px; font-weight: 600; }
.hero-title .accent { color: var(--accent); }
p.hero-sub { color: var(--text-dim); font-size: 16px; line-height: 1.55; margin: 0 auto; max-width: 600px; }

/* --- Prompt input --- */
.prompt-panel {
  background: var(--bg-raised); border: 1px solid var(--border); border-radius: 10px;
  overflow: hidden; margin-bottom: 32px;
}
.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--border);
  font-size: 12px; font-family: var(--font-mono); text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--text-dim);
}
.token-input {
  width: 100%; min-height: 180px; resize: vertical;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 14px 16px;
  font-family: var(--font-mono); font-size: 13px; line-height: 1.6;
  outline: none;
}
.token-input:focus { border-color: var(--accent); }
.token-input::placeholder { color: var(--text-faint); }
.prompt-body { padding: 18px; }
.char-count { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); margin-top: 8px; }

/* --- Section 1: Token view columns --- */
.section-head { margin: 0 0 20px; }
.section-head h2 { font-size: 22px; margin: 0; letter-spacing: -0.015em; font-weight: 600; }
.section-head p { color: var(--text-dim); font-size: 14px; margin: 4px 0 0; }

.token-columns { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 24px; }
@media (max-width: 860px) { .token-columns { grid-template-columns: 1fr; } }

.token-col {
  background: var(--bg-raised); border: 1px solid var(--border); border-radius: 10px;
  overflow: hidden;
}
.token-col-header {
  padding: 14px 16px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.token-col-provider {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-faint);
}
.token-col-models { font-family: var(--font-mono); font-size: 11px; color: var(--text-dim); }
.token-col-body { padding: 16px; min-height: 100px; }
.token-col-count {
  font-family: var(--font-mono); font-size: 32px; font-weight: 600;
  color: var(--accent); margin-bottom: 8px; font-variant-numeric: tabular-nums;
}
.token-col-count.pending { opacity: 0.5; }
.token-col-meta { font-family: var(--font-mono); font-size: 11px; color: var(--text-dim); line-height: 1.6; }
.token-col-note { font-size: 11px; color: var(--text-faint); margin-top: 8px; line-height: 1.4; }
.tt-badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.04em;
  padding: 2px 7px; border-radius: 999px; border: 1px solid transparent;
  text-transform: uppercase;
}
.tt-badge-verified { color: var(--good); background: color-mix(in srgb, var(--good) 10%, transparent); border-color: color-mix(in srgb, var(--good) 30%, transparent); }
.tt-badge-fallback { color: var(--warn); background: color-mix(in srgb, var(--warn) 10%, transparent); border-color: color-mix(in srgb, var(--warn) 30%, transparent); }
.tt-badge-pending { color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); border-color: color-mix(in srgb, var(--accent) 30%, transparent); animation: pulse-badge 1.2s ease-in-out infinite; }
@keyframes pulse-badge { 0%, 100% { opacity: 0.6; } 50% { opacity: 1; } }

/* Comparison strip */
.comparison-strip {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: 8px;
  padding: 14px 18px; margin-bottom: 48px;
  font-family: var(--font-mono); font-size: 13px; color: var(--text-dim);
  text-align: center; line-height: 1.6;
}
.comparison-strip .count-highlight { color: var(--text); font-weight: 500; }
.comparison-strip .diff-up { color: var(--warn); }
.comparison-strip .diff-down { color: var(--good); }

/* --- Token visualization (GPT column) --- */
.token-vis {
  display: flex; flex-wrap: wrap; gap: 2px; margin-bottom: 12px;
  max-height: 160px; overflow-y: auto; padding: 8px;
  background: var(--bg); border-radius: 6px; border: 1px solid var(--border);
}
.token-chip {
  display: inline-block; padding: 1px 3px; border-radius: 3px;
  font-family: var(--font-mono); font-size: 11px; line-height: 1.4;
  cursor: default; white-space: pre;
}
.token-chip:hover { outline: 1px solid var(--text); }
.token-chip-tooltip {
  position: fixed; z-index: 100; padding: 4px 8px;
  background: var(--bg-elev); border: 1px solid var(--border-strong); border-radius: 4px;
  font-family: var(--font-mono); font-size: 10px; color: var(--text-dim);
  pointer-events: none;
}

/* --- Section 2: Cost comparison --- */
.cost-section { margin-bottom: 48px; }
.cost-controls {
  display: flex; gap: 24px; align-items: center; flex-wrap: wrap;
  margin-bottom: 20px;
}
.cost-control { display: flex; flex-direction: column; gap: 4px; }
.cost-control label {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-faint);
}
.slider { -webkit-appearance: none; appearance: none; width: 200px; height: 4px; background: var(--border); border-radius: 2px; outline: none; }
.slider::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 14px; height: 14px; border-radius: 50%; background: var(--accent); cursor: pointer; border: 2px solid var(--bg-raised); }
.slider::-moz-range-thumb { width: 14px; height: 14px; border-radius: 50%; background: var(--accent); cursor: pointer; border: 2px solid var(--bg-raised); }
.cost-value { font-family: var(--font-mono); font-size: 12px; color: var(--text); }

.toggle { position: relative; width: 34px; height: 20px; background: var(--border); border-radius: 10px; cursor: pointer; transition: background 120ms; border: none; padding: 0; }
.toggle::after { content: ""; position: absolute; width: 14px; height: 14px; border-radius: 50%; background: var(--text); top: 3px; left: 3px; transition: left 160ms; }
.toggle[aria-checked="true"] { background: var(--accent); }
.toggle[aria-checked="true"]::after { left: 17px; background: var(--accent-ink); }
.toggle-row { display: flex; align-items: center; gap: 8px; }
.toggle-label { font-family: var(--font-mono); font-size: 11px; color: var(--text-dim); }

.cost-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.cost-card {
  background: var(--bg-raised); border: 1px solid var(--border); border-radius: 8px;
  padding: 14px 16px; transition: border-color 120ms;
}
.cost-card.cheapest { border-color: var(--good); }
.cost-card-provider {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-faint); margin-bottom: 2px;
}
.cost-card-name { font-size: 14px; font-weight: 500; margin-bottom: 8px; }
.cost-card-price { font-family: var(--font-mono); font-size: 22px; font-weight: 600; color: var(--text); font-variant-numeric: tabular-nums; }
.cost-card-period { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); }
.cost-card .badge {
  display: inline-block; margin-top: 6px; padding: 2px 7px; border-radius: 999px;
  font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.08em; text-transform: uppercase;
}
.badge-cheap { background: color-mix(in srgb, var(--good) 18%, transparent); color: var(--good); border: 1px solid color-mix(in srgb, var(--good) 35%, transparent); }
.cost-crosslink {
  margin-top: 16px; text-align: center; font-size: 13px;
}

/* --- Section 3: Advisor --- */
.advisor-section { margin-bottom: 48px; }
.advisor-total {
  background: color-mix(in srgb, var(--good) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--good) 25%, transparent);
  border-radius: 10px; padding: 20px 24px; margin-bottom: 20px;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px;
}
.advisor-total-amount { font-family: var(--font-mono); font-size: 28px; font-weight: 600; color: var(--good); }
.advisor-total-label { font-size: 14px; color: var(--text-dim); }
.advisor-apply-all {
  background: var(--accent); color: var(--accent-ink); border: none; border-radius: 6px;
  padding: 8px 16px; font-family: var(--font-mono); font-size: 12px; font-weight: 600;
  cursor: pointer; letter-spacing: 0.02em;
}
.advisor-apply-all:hover { opacity: 0.9; }

.advisor-empty {
  text-align: center; padding: 40px 20px;
  color: var(--text-dim); font-size: 15px;
}
.advisor-empty .check { color: var(--good); font-size: 28px; margin-bottom: 8px; }

.advisor-cards { display: flex; flex-direction: column; gap: 10px; }
.advisor-card {
  background: var(--bg-raised); border: 1px solid var(--border); border-radius: 8px;
  padding: 14px 16px; display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: start;
}
.advisor-card-body { min-width: 0; }
.advisor-card-category {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em;
  text-transform: uppercase; margin-bottom: 4px;
}
.advisor-card-category.high { color: var(--bad); }
.advisor-card-category.medium { color: var(--warn); }
.advisor-card-category.low { color: var(--text-faint); }
.advisor-card-match {
  font-family: var(--font-mono); font-size: 12px; color: var(--text);
  background: color-mix(in srgb, var(--warn) 12%, transparent);
  padding: 2px 6px; border-radius: 4px; display: inline-block; margin-bottom: 6px;
}
.advisor-card-suggestion { font-size: 13px; color: var(--text-dim); margin-bottom: 6px; }
.advisor-card-savings { font-family: var(--font-mono); font-size: 11px; color: var(--good); }
.advisor-card-actions { display: flex; flex-direction: column; gap: 6px; align-items: flex-end; }
.advisor-apply-btn {
  background: transparent; border: 1px solid var(--border); color: var(--accent);
  border-radius: 5px; padding: 5px 12px; font-family: var(--font-mono); font-size: 11px;
  cursor: pointer; white-space: nowrap;
}
.advisor-apply-btn:hover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); }

/* --- SEO section (static HTML below React) --- */
.seo-section {
  margin-top: 80px; max-width: 720px; margin-left: auto; margin-right: auto;
}
.seo-section h2 { font-size: 24px; margin: 0 0 16px; letter-spacing: -0.015em; font-weight: 600; }
.seo-section .prose { color: var(--text-dim); font-size: 15px; line-height: 1.7; }
.seo-section .prose p { margin: 0 0 14px; }
.seo-section .prose strong { color: var(--text); font-weight: 500; }
.seo-section details {
  border: 1px solid var(--border); border-radius: 8px;
  margin-bottom: 8px; overflow: hidden;
}
.seo-section summary {
  padding: 12px 16px; cursor: pointer; font-size: 14px; font-weight: 500;
  color: var(--text); background: var(--bg-raised);
}
.seo-section summary:hover { color: var(--accent); }
.seo-section details[open] summary { border-bottom: 1px solid var(--border); }
.seo-section details .answer { padding: 12px 16px; font-size: 14px; line-height: 1.6; color: var(--text-dim); }

/* --- Footer --- */
.footer {
  margin-top: 80px; padding: 32px 32px 48px; border-top: 1px solid var(--border);
  color: var(--text-faint); font-size: 12px;
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  max-width: 1280px; margin-left: auto; margin-right: auto;
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .topbar { padding: 14px 16px; }
  .page { padding: 32px 16px 80px; }
  h1.hero-title { font-size: 28px; }
  .cost-controls { flex-direction: column; }
  .slider { width: 100%; }
  .advisor-total { flex-direction: column; text-align: center; }
}