/* ── Design tokens ─────────────────────────────────────────────────────── */
:root {
  --bg: #f0f2f5;
  --surface: #ffffff;
  --surface-2: #f7f8fb;
  --text: #1c1c28;
  --muted: #667085;
  --primary: #4361ee;
  --primary-ink: #ffffff;
  --accent: #7209b7;
  --danger: #c0392b;
  --warn-bg: #fff3cd;
  --warn-border: #e6c200;
  --border: #e4e7ec;
  --radius: 10px;
  --shadow: 0 1px 4px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 8px 24px rgba(16, 24, 40, 0.12);
  --chart-grid: rgba(16, 24, 40, 0.08);
  --chart-tick: #667085;
  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #0f1420;
  --surface: #1a2233;
  --surface-2: #141b2a;
  --text: #eef1f6;
  --muted: #9aa4b2;
  --primary: #7c94ff;
  --primary-ink: #0f1420;
  --accent: #c77dff;
  --danger: #ff8a80;
  --warn-bg: #3a2f0b;
  --warn-border: #8a6d00;
  --border: #2a3446;
  --shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.45);
  --chart-grid: rgba(255, 255, 255, 0.08);
  --chart-tick: #9aa4b2;
  color-scheme: dark;
}

/* ── Reset & base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
  line-height: 1.5;
  transition: background 0.2s ease, color 0.2s ease;
}

:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* ── Header & nav ─────────────────────────────────────────────────────────── */
header.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
  margin-bottom: 1.25rem;
}
header.topbar h1 { font-size: 1.75rem; letter-spacing: -0.01em; }
header.topbar .spacer { flex: 1; }

nav.topnav { display: flex; gap: 0.25rem; align-items: center; }
nav.topnav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.45rem 0.8rem;
  border-radius: 8px;
}
nav.topnav a:hover { background: var(--surface-2); color: var(--text); }
nav.topnav a[aria-current="page"] { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }

/* ── Buttons & inputs ─────────────────────────────────────────────────────── */
.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 8px;
  padding: 0.45rem 0.8rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.05s ease, background 0.15s ease;
}
.btn:hover { background: var(--surface-2); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: var(--primary-ink); }
.btn-primary:hover { filter: brightness(1.08); background: var(--primary); }
.btn[aria-pressed="true"] { background: var(--text); border-color: var(--text); color: var(--bg); }

select, input[type="range"] { accent-color: var(--primary); }
select, input[type="search"] {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.45rem 0.6rem;
  font-size: 0.9rem;
}

/* Compare pills + heatmap + ranking */
.pill { display: inline-flex; gap: 0.35rem; align-items: center; }
#heatmap td, #heatmap th { border: 1px solid var(--border); padding: 0.35rem 0.5rem; text-align: center; }
#heatmap td.cell { cursor: pointer; font-weight: 700; }
#heatmap td.cell:hover { outline: 2px solid var(--primary); outline-offset: -2px; }
#rank-table td, #rank-table th { border-bottom: 1px solid var(--border); padding: 0.4rem; }
#rank-table tbody tr:hover { background: var(--surface-2); }
#rank-table tr.me { background: var(--surface-2); }
.verdict-beats { color: #1e9e6a; font-weight: 700; }
.verdict-worse { color: var(--danger); font-weight: 700; }
[data-theme="dark"] .verdict-beats { color: #5fd6b5; }

/* ── KPI cards ────────────────────────────────────────────────────────────── */
.kpi-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1rem;
  box-shadow: var(--shadow);
}
.card h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.4rem;
}
.kpi-value {
  font-size: 1.6rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  min-height: 2.2rem;
}
.kpi-sub { font-size: 0.8rem; color: var(--muted); }

/* Loading shimmer for KPI values */
.loading { position: relative; overflow: hidden; color: transparent !important; }
.loading::after {
  content: ""; position: absolute; inset: 0; border-radius: 6px;
  background: linear-gradient(90deg, var(--surface-2) 25%, var(--border) 50%, var(--surface-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite;
}
@keyframes shimmer { to { background-position: -200% 0; } }
@media (prefers-reduced-motion: reduce) {
  .loading::after { animation: none; }
  * { transition: none !important; }
}

/* ── Sections & charts ────────────────────────────────────────────────────── */
.chart-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.25rem 1rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.25rem;
}
.chart-section h2 { font-size: 1rem; color: var(--muted); margin-bottom: 0.9rem; font-weight: 700; }
.chart-section h2 .tag { font-weight: 400; font-size: 0.8rem; }
.chart-wrap { position: relative; height: 340px; }
.chart-wrap.tall { height: 420px; }
.chart-wrap canvas { max-height: 100%; }

/* ── Controls bar ─────────────────────────────────────────────────────────── */
.controls { display: flex; flex-wrap: wrap; gap: 0.75rem 1rem; align-items: center; }
.controls .group { display: flex; flex-wrap: wrap; gap: 0.4rem; align-items: center; }
.controls .group-label { font-size: 0.8rem; color: var(--muted); font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; }
.toggles { display: flex; flex-wrap: wrap; gap: 0.2rem 0.9rem; }
.toggles label { font-size: 0.9rem; display: inline-flex; gap: 0.35rem; align-items: center; cursor: pointer; }
.slider-row { display: flex; align-items: center; gap: 0.6rem; font-size: 0.9rem; }
.slider-row output { font-variant-numeric: tabular-nums; min-width: 6ch; }

/* ── Banner, lists, footer ────────────────────────────────────────────────── */
.banner {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  color: var(--text);
  padding: 0.65rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  display: none;
  font-size: 0.9rem;
}
.error-box { padding: 2rem; color: var(--danger); }
.error-box ol { margin-top: 0.5rem; padding-left: 1.5rem; line-height: 2; }

ul.clean { padding-left: 1.2rem; font-size: 0.9rem; }
ul.clean li { margin-bottom: 0.25rem; font-variant-numeric: tabular-nums; }

footer.site {
  margin: 1.5rem 0 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.5rem;
}
footer.site .dot::before { content: "· "; }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 560px) {
  body { padding: 1rem; }
  header.topbar h1 { font-size: 1.35rem; }
  .kpi-value { font-size: 1.3rem; }
  .chart-wrap, .chart-wrap.tall { height: 280px; }
}