:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --ink: #1c2130;
  --muted: #63697b;
  --accent: #2f6feb;
  --accent-ink: #ffffff;
  --border: #e2e5ee;
  --warn-bg: #fff6e5;
  --warn-border: #f0c96b;
  --good: #2fa86b;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161f;
    --panel: #1c1f2b;
    --ink: #eef0f6;
    --muted: #9aa0b4;
    --border: #2c3040;
    --warn-bg: #2a2410;
    --warn-border: #7a5f16;
  }
}
:root[data-theme="dark"] {
  --bg: #14161f;
  --panel: #1c1f2b;
  --ink: #eef0f6;
  --muted: #9aa0b4;
  --border: #2c3040;
  --warn-bg: #2a2410;
  --warn-border: #7a5f16;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

.page-header {
  padding: 28px 16px 12px;
  text-align: center;
}
.page-header h1 { margin: 0 0 6px; font-size: 1.7rem; }
.tagline { color: var(--muted); margin: 0; }

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 8px 16px 48px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.disclaimer {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 0.92rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 18px 20px;
}
.panel h2 { margin-top: 0; font-size: 1.1rem; }
.panel h3 { font-size: 0.95rem; margin: 14px 0 8px; color: var(--muted); }

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 26px 16px;
  text-align: center;
  cursor: pointer;
  color: var(--muted);
  transition: border-color 0.15s, background 0.15s;
}
.drop-zone.drag-active { border-color: var(--accent); background: rgba(47, 111, 235, 0.06); }
.drop-zone p { margin: 0; }

.link-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  padding: 8px 0 0;
  font-size: 0.9rem;
  text-decoration: underline;
}

.canvas-wrap { margin-top: 12px; }
.canvas-wrap canvas {
  max-width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: block;
}

.format-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.format-row label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--muted);
  flex: 1 1 220px;
}
select {
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--ink);
  font-size: 0.95rem;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  font-size: 0.88rem;
  color: var(--muted);
}

.primary-btn {
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 0.95rem;
  cursor: pointer;
}
.primary-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.status { color: var(--muted); font-size: 0.88rem; min-height: 1.2em; }
.status.error { color: #c0433e; }

.results.hidden { display: none; }
.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 560px) {
  .results-grid { grid-template-columns: 1fr; }
}

.mono { font-family: "SFMono-Regular", Consolas, Menlo, monospace; font-size: 1.05rem; letter-spacing: 0.04em; }

.candidate-list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.candidate-list li {
  display: grid;
  grid-template-columns: 32px auto 1fr 34px;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.rank { color: var(--muted); font-size: 0.85rem; }
.plate-chip {
  font-family: "SFMono-Regular", Consolas, Menlo, monospace;
  font-weight: 600;
  letter-spacing: 0.06em;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
}
.score-bar-track {
  height: 6px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.score-bar-fill { display: block; height: 100%; background: var(--good); }
.score-label { text-align: right; color: var(--muted); font-size: 0.85rem; }

.crop-section.hidden { display: none; }
.crop-section { margin-top: 14px; }
.crop-stage {
  position: relative;
  display: inline-block;
  margin-top: 10px;
  max-width: 100%;
  line-height: 0;
  cursor: crosshair;
  user-select: none;
}
.crop-stage .canvas-wrap { margin-top: 0; }
.crop-overlay {
  position: absolute;
  left: 0; top: 0;
  border: 2px solid var(--accent);
  background: rgba(47, 111, 235, 0.18);
  pointer-events: none;
  display: none;
}
.crop-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 6px;
}

.low-signal-warning {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.88rem;
  margin-bottom: 14px;
}
.low-signal-warning.hidden { display: none; }

.manual-fallback { margin-top: 10px; }
.manual-fallback.hidden { display: none; }
.manual-row { display: flex; gap: 8px; margin-top: 6px; }
.manual-row input {
  flex: 1;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--ink);
  letter-spacing: 0.06em;
}
.small-btn { padding: 8px 12px; font-size: 0.85rem; }

.muted { color: var(--muted); }
.small { font-size: 0.82rem; }

.page-footer {
  text-align: center;
  padding: 10px 16px 36px;
}