:root {
  --bg: #0A0E1A;
  --bg-raised: #0F1420;
  --bg-elev: #141a2a;
  --border: #1f2940;
  --border-strong: #2a3a5c;
  --text: #E8EAED;
  --text-dim: #9098a8;
  --text-faint: #5e6678;
  --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;
}

html[data-theme="light"] {
  --bg: #fafaf7;
  --bg-raised: #ffffff;
  --bg-elev: #ffffff;
  --border: #e7e4dc;
  --border-strong: #d0cdc4;
  --text: #111418;
  --text-dim: #5a6273;
  --text-faint: #8b91a1;
  --accent: #0aa89f;
  --accent-ink: #ffffff;
  --warn: #b35f00;
  --good: #1a7f37;
  --bad: #c2354a;
}

* { 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; }
.tabular { 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; }
.brand-slash { color: var(--text-faint); margin: 0 6px; }
.brand-sub { color: var(--text-dim); font-weight: 400; font-size: 13px; }
.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; }
.icon-btn {
  background: transparent; border: 1px solid var(--border); color: var(--text-dim);
  width: 32px; height: 32px; border-radius: 6px; cursor: pointer;
  display: grid; place-items: center;
}
.icon-btn:hover { border-color: var(--border-strong); color: var(--text); }

/* --- Layout --- */
.page { max-width: 1280px; margin: 0 auto; padding: 56px 32px 120px; }
.hero { margin-bottom: 48px; max-width: 780px; }
.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: 44px; line-height: 1.08; letter-spacing: -0.02em; margin: 0 0 16px; font-weight: 600; }
.hero-title .accent { color: var(--accent); }
p.hero-sub { color: var(--text-dim); font-size: 17px; line-height: 1.55; margin: 0; max-width: 640px; }
p.hero-sub code { font-family: var(--font-mono); font-size: 14px; background: var(--bg-elev); padding: 2px 6px; border-radius: 4px; border: 1px solid var(--border); color: var(--text); }

/* --- Calculator grid --- */
.calc-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 24px;
  align-items: start;
}
@media (max-width: 980px) { .calc-grid { grid-template-columns: 1fr; } }

.panel {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.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);
}
.panel-body { padding: 18px; }

/* --- Textarea --- */
.token-input {
  width: 100%; min-height: 200px; 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); }

.counter-row {
  display: flex; gap: 20px; margin-top: 12px; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 12px;
}
.counter-cell { display: flex; flex-direction: column; gap: 2px; }
.counter-label {
  color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.08em; font-size: 10px;
  display: inline-flex; align-items: center; gap: 4px;
}
.counter-value { color: var(--text); font-size: 14px; font-variant-numeric: tabular-nums; }
.counter-value.highlight { color: var(--accent); }

.help-dot {
  display: inline-grid; place-items: center;
  width: 12px; height: 12px; border-radius: 50%;
  border: 1px solid var(--text-faint); color: var(--text-faint);
  font-size: 8px; cursor: help; font-family: var(--font-sans);
}
.help-dot:hover { color: var(--text); border-color: var(--text); }

/* --- Model selector --- */
.model-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 8px;
}
.model-card {
  border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; cursor: pointer; background: transparent;
  text-align: left; color: inherit; font-family: inherit;
  transition: border-color 120ms, background 120ms;
  position: relative;
}
.model-card:hover { border-color: var(--border-strong); }
.model-card.selected { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); }
.model-card .mc-provider {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-faint);
}
.model-card .mc-name { font-size: 14px; font-weight: 500; margin-top: 2px; color: var(--text); }
.model-card .mc-meta {
  margin-top: 8px; display: flex; gap: 10px; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 11px; color: var(--text-dim);
}
.model-card .mc-meta .slash { color: var(--text-faint); margin: 0 2px; }
.model-card.custom { border-style: dashed; }

/* --- Advanced panel --- */
.advanced-toggle {
  width: 100%; text-align: left; padding: 14px 18px;
  background: transparent; border: none; border-top: 1px solid var(--border);
  color: var(--text-dim); font-family: var(--font-mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.08em; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between;
}
.advanced-toggle:hover { color: var(--text); }
.advanced-body { padding: 4px 18px 20px; border-top: 1px solid var(--border); }

.row { display: grid; grid-template-columns: 180px 1fr auto; gap: 16px; align-items: center; padding: 14px 0; border-bottom: 1px dashed var(--border); }
.row:last-child { border-bottom: none; }
.row-label { font-size: 13px; color: var(--text); }
.row-label .sub { display: block; color: var(--text-faint); font-size: 11px; font-family: var(--font-mono); margin-top: 2px; }
.row-value { font-family: var(--font-mono); font-size: 13px; color: var(--text); min-width: 80px; text-align: right; }

/* slider */
.slider { -webkit-appearance: none; appearance: none; width: 100%; 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); }

/* number input */
.num-input {
  background: var(--bg); border: 1px solid var(--border); color: var(--text);
  border-radius: 6px; padding: 6px 8px; font-family: var(--font-mono); font-size: 12px;
  width: 90px; text-align: right; outline: none;
}
.num-input:focus { border-color: var(--accent); }

/* toggle */
.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); }

/* --- Warning banner --- */
.warning {
  margin: 16px 18px 0; padding: 14px 16px;
  background: color-mix(in srgb, var(--warn) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--warn) 35%, transparent);
  border-radius: 8px; display: flex; gap: 12px; align-items: flex-start;
  font-size: 13px; line-height: 1.5;
}
.warning-icon { color: var(--warn); flex-shrink: 0; margin-top: 1px; }
.warning strong { color: var(--warn); font-weight: 600; }
.warning .warning-slider { margin-top: 10px; display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center; }

/* --- Results panel --- */
.results { position: sticky; top: 90px; }
.results-kpis { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); border-radius: 8px; overflow: hidden; border: 1px solid var(--border); }
.kpi { background: var(--bg-raised); padding: 14px 16px; }
.kpi-label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-faint); }
.kpi-value { font-family: var(--font-mono); font-size: 20px; margin-top: 4px; color: var(--text); font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.kpi.big { grid-column: 1 / -1; padding: 20px 18px; }
.kpi.big .kpi-value { font-size: 38px; letter-spacing: -0.03em; color: var(--accent); font-weight: 500; }

.breakdown { margin-top: 20px; }
.breakdown-title { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 10px; }
.bar { height: 10px; border-radius: 2px; overflow: hidden; background: var(--border); display: flex; }
.bar-seg { height: 100%; }
.bar-input { background: var(--accent); }
.bar-output { background: color-mix(in srgb, var(--accent) 50%, #6b72ff); }
.bar-cache { background: color-mix(in srgb, var(--good) 70%, var(--bg)); }
.legend { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 16px; margin-top: 12px; font-family: var(--font-mono); font-size: 12px; }
.legend-row { display: flex; justify-content: space-between; align-items: center; color: var(--text-dim); }
.legend-row .dot { width: 8px; height: 8px; border-radius: 2px; display: inline-block; margin-right: 8px; vertical-align: middle; }
.legend-row .amt { color: var(--text); font-variant-numeric: tabular-nums; }
.legend-row.savings .amt { color: var(--good); }

.recommendation {
  margin-top: 16px; padding: 12px 14px; border-radius: 8px;
  background: color-mix(in srgb, var(--good) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--good) 30%, transparent);
  font-size: 13px; line-height: 1.5; color: var(--text);
  display: flex; gap: 10px; align-items: flex-start;
}
.recommendation strong { color: var(--good); }
.rec-link { background: transparent; border: none; color: var(--accent); cursor: pointer; padding: 0; text-decoration: underline; font-family: inherit; font-size: inherit; }

/* --- Comparison table --- */
.section-head { margin: 64px 0 20px; display: flex; justify-content: space-between; align-items: end; gap: 20px; flex-wrap: wrap; }
.section-head h2 { font-size: 24px; margin: 0; letter-spacing: -0.015em; font-weight: 600; }
.section-head p { color: var(--text-dim); font-size: 14px; margin: 4px 0 0; max-width: 600px; }

.cmp-table {
  width: 100%; border-collapse: separate; border-spacing: 0;
  background: var(--bg-raised); border: 1px solid var(--border); border-radius: 10px;
  overflow: hidden;
  font-variant-numeric: tabular-nums;
}
.cmp-table th, .cmp-table td {
  text-align: right; padding: 11px 14px; font-family: var(--font-mono); font-size: 12px;
  border-bottom: 1px solid var(--border);
}
.cmp-table th {
  color: var(--text-faint); font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em;
  font-size: 10px; background: var(--bg-elev); cursor: pointer; user-select: none;
  position: sticky; top: 0;
}
.cmp-table th:hover { color: var(--text); }
.cmp-table th.active { color: var(--accent); }
.cmp-table tr:last-child td { border-bottom: none; }
.cmp-table td.name { text-align: left; color: var(--text); font-family: var(--font-sans); font-size: 13px; }
.cmp-table td.name .prov { color: var(--text-faint); font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; display: block; margin-top: 2px; }
.cmp-table tr.current td { background: color-mix(in srgb, var(--accent) 6%, transparent); }
.badge {
  display: inline-block; margin-left: 8px; padding: 2px 7px; border-radius: 999px;
  font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.08em; text-transform: uppercase;
  vertical-align: 1px;
}
.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); }
.badge.value { background: color-mix(in srgb, var(--accent) 15%, transparent); color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); }
.badge.context { background: transparent; color: var(--text-faint); border: 1px solid var(--border); }
.cmp-table.compact th, .cmp-table.compact td { padding: 7px 10px; font-size: 11px; }

/* --- About section --- */
.about { margin-top: 80px; display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 48px; }
@media (max-width: 780px) { .about { grid-template-columns: 1fr; gap: 20px; } }
.about-kicker { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-faint); }
.about h2 { font-size: 28px; margin: 4px 0 0; letter-spacing: -0.02em; font-weight: 600; }
.about .prose { color: var(--text-dim); font-size: 15px; line-height: 1.7; max-width: 680px; }
.about .prose p { margin: 0 0 14px; }
.about .prose strong { color: var(--text); font-weight: 500; }
.about .prose code { font-family: var(--font-mono); font-size: 13px; background: var(--bg-elev); padding: 1px 6px; border-radius: 4px; color: var(--text); }
.about .prose h3 { color: var(--text); font-size: 16px; margin: 24px 0 8px; font-weight: 600; }

/* --- Share bar --- */
.share-bar {
  display: flex; gap: 10px; align-items: center; margin-top: 16px;
  padding: 12px 14px; background: var(--bg-raised); border: 1px solid var(--border); border-radius: 8px;
  font-family: var(--font-mono); font-size: 12px;
}
.share-url {
  flex: 1; background: transparent; color: var(--text-dim); border: none; outline: none;
  font-family: inherit; font-size: 12px; min-width: 0; overflow: hidden; text-overflow: ellipsis;
}
.share-copy {
  background: transparent; color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 4px 10px; font-family: inherit; font-size: 11px; cursor: pointer;
}
.share-copy:hover { border-color: var(--accent); color: var(--accent); }

/* --- 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;
}
.footer .mono { color: var(--text-dim); }

/* --- Font variant overrides from Tweaks --- */
html[data-font="inter"] { --font-sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif; --font-mono: "JetBrains Mono", "SF Mono", Menlo, monospace; }
html[data-font="geist"] { --font-sans: "Geist", "Inter", sans-serif; --font-mono: "Geist Mono", "JetBrains Mono", monospace; }
html[data-font="ibm"] { --font-sans: "IBM Plex Sans", "Inter", sans-serif; --font-mono: "IBM Plex Mono", "JetBrains Mono", monospace; }
html[data-font="system"] { --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; --font-mono: ui-monospace, "SF Mono", Menlo, monospace; }

/* tick animation */
@keyframes tick { 0% { opacity: 0.5; transform: translateY(-2px); } 100% { opacity: 1; transform: translateY(0); } }
.tick { animation: tick 220ms ease-out; }

.pulse {
  animation: pulse 280ms ease-out;
}
@keyframes pulse {
  0% { background: color-mix(in srgb, var(--accent) 20%, transparent); }
  100% { background: transparent; }
}

/* Token badges */
.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-estimated { 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: tt-pending-pulse 1.2s ease-in-out infinite; }
.tt-badge-loading { color: var(--text-dim); border-color: var(--border); }

@keyframes tt-pending-pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

.tt-count-pulse {
  animation: tt-count-glow 1.2s ease-in-out infinite;
}
@keyframes tt-count-glow {
  0%, 100% { text-shadow: 0 0 0 transparent; color: var(--accent); }
  50% { text-shadow: 0 0 8px color-mix(in srgb, var(--accent) 60%, transparent); color: var(--accent); }
}

.tt-info-btn {
  background: transparent; border: none; color: var(--text-faint);
  padding: 0; margin-left: 4px; cursor: pointer; display: inline-flex; align-items: center;
}
.tt-info-btn:hover { color: var(--text); }

.tt-popover {
  position: absolute; top: calc(100% + 6px); left: 0; z-index: 50;
  background: var(--bg-elev); border: 1px solid var(--border-strong); border-radius: 8px;
  padding: 14px 14px 10px; width: 320px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.45);
  font-family: var(--font-sans);
}
.tt-popover-title {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-faint); margin-bottom: 8px;
}
.tt-popover-list { margin: 0; padding-left: 16px; font-size: 12px; line-height: 1.55; color: var(--text-dim); }
.tt-popover-list li { margin-bottom: 6px; }
.tt-popover-list strong { color: var(--text); font-weight: 500; }
.tt-popover-close {
  margin-top: 8px; background: transparent; border: 1px solid var(--border); color: var(--text-dim);
  border-radius: 5px; padding: 4px 10px; font-family: var(--font-mono); font-size: 11px; cursor: pointer;
}
/* Model card extras */
.mc-tag {
  display: inline-block; font-family: var(--font-mono); font-size: 9px;
  letter-spacing: 0.04em; padding: 1px 5px; border-radius: 3px; margin-left: 5px;
  text-transform: uppercase; vertical-align: middle;
}
.mc-tag-new { background: color-mix(in srgb, var(--good) 20%, transparent); color: var(--good); }
.mc-tag-legacy { background: color-mix(in srgb, var(--text-faint) 20%, transparent); color: var(--text-faint); }
.mc-tag-tiered { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent); }
.mc-tag-unverified { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); }

.mc-release {
  font-family: var(--font-mono); font-size: 10px; color: var(--text-faint);
  margin-top: 6px; letter-spacing: 0.02em;
}
.mc-verified-dot { color: var(--good); margin-left: 4px; font-weight: 700; }

/* Comparison table additions */
.badge.tier-warn {
  background: color-mix(in srgb, var(--warn) 18%, transparent);
  color: var(--warn);
  border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent);
}
.badge.unverified {
  background: color-mix(in srgb, var(--text-faint) 15%, transparent);
  color: var(--text-faint);
  border: 1px solid var(--border);
}
.tier-sub {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--text-faint); margin-top: 2px;
}