:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --gridline: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.1);
  --series-1: #2a78d6; /* blue */
  --series-2: #eb6834; /* orange */
  --good: #0ca30c;
  --critical: #d03b3b;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(11, 11, 11, 0.06), 0 1px 8px rgba(11, 11, 11, 0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --gridline: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.1);
    --series-1: #3987e5;
    --series-2: #d95926;
    --good: #0ca30c;
    --critical: #e66767;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 8px rgba(0, 0, 0, 0.2);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--page);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

body {
  min-height: 100vh;
}

a { color: var(--series-1); }

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px 64px;
}

header.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 20px;
  max-width: 960px;
  margin: 0 auto;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand .mark {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: var(--series-1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
}

nav.tabs {
  display: flex;
  gap: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px;
}

nav.tabs a {
  padding: 8px 16px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

nav.tabs a.active {
  background: var(--series-1);
  color: #fff;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.card + .card { margin-top: 20px; }

h1 { font-size: 1.5rem; margin: 0 0 4px; }
h2 { font-size: 1.1rem; margin: 0 0 16px; }
.subtitle { color: var(--text-secondary); margin: 0 0 24px; }

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.field { margin-bottom: 18px; }

input[type="text"], input[type="url"] {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--page);
  color: var(--text-primary);
  font-size: 0.95rem;
}

input:focus { outline: 2px solid var(--series-1); outline-offset: 1px; }

.hint { font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 8px;
  border: none;
  background: var(--series-1);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}

.btn:hover { filter: brightness(1.08); }
.btn.secondary { background: var(--gridline); color: var(--text-primary); }
.btn.danger { background: var(--critical); color: #fff; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.error-text { color: var(--critical); font-size: 0.85rem; margin-top: 8px; }

.result-box {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px dashed var(--gridline);
  display: none;
}

.result-box.visible { display: flex; gap: 24px; flex-wrap: wrap; align-items: flex-start; }

.qr-canvas-wrap {
  background: #fff;
  padding: 12px;
  border-radius: 8px;
  display: inline-block;
}

.result-details { flex: 1; min-width: 220px; }

.link-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--page);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  margin: 8px 0 16px;
}

.link-row code { font-size: 0.85rem; word-break: break-all; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.stat-tile {
  background: var(--page);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.stat-tile .value { font-size: 1.6rem; font-weight: 700; }
.stat-tile .label { font-size: 0.8rem; color: var(--text-secondary); margin-top: 2px; }

table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--gridline); }
th { color: var(--text-muted); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.03em; }
tr:last-child td { border-bottom: none; }

.code-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--gridline);
  text-decoration: none;
  color: inherit;
}

.code-list-item:last-child { border-bottom: none; }
.code-list-item:hover { opacity: 0.85; }
.code-list-item .meta { color: var(--text-secondary); font-size: 0.85rem; margin-top: 2px; }
.code-list-item .scans { text-align: right; white-space: nowrap; }
.code-list-item .scans .big { font-size: 1.2rem; font-weight: 700; }
.code-list-item .scans .small { font-size: 0.75rem; color: var(--text-muted); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  background: var(--gridline);
  color: var(--text-secondary);
}
.badge.inactive { color: var(--critical); }

.bar-row { display: flex; align-items: center; gap: 10px; padding: 5px 0; font-size: 0.85rem; }
.bar-row .bar-label { width: 110px; flex-shrink: 0; color: var(--text-secondary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-row .bar-track { flex: 1; background: var(--gridline); border-radius: 4px; height: 10px; position: relative; }
.bar-row .bar-fill { background: var(--series-1); border-radius: 4px; height: 10px; }
.bar-row .bar-value { width: 40px; text-align: right; flex-shrink: 0; font-variant-numeric: tabular-nums; }

.chart-tooltip {
  position: fixed;
  pointer-events: none;
  background: var(--text-primary);
  color: var(--page);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  z-index: 50;
  opacity: 0;
  transition: opacity 0.1s;
  white-space: nowrap;
}

.chart-tooltip.visible { opacity: 1; }

.empty-state { text-align: center; padding: 40px 20px; color: var(--text-secondary); }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 640px) {
  .two-col { grid-template-columns: 1fr; }
  header.site-header { flex-direction: column; align-items: flex-start; }
}

.top-actions { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; gap: 12px; flex-wrap: wrap; }

.icon-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  padding: 5px 10px;
  font-size: 0.8rem;
  cursor: pointer;
}
.icon-btn:hover { background: var(--page); }

.back-link { display: inline-flex; align-items: center; gap: 4px; text-decoration: none; color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 16px; }