/* RVF Seed Decoder - Minimal CSS with theme support */

:root {
  --bg: #0f1117;
  --bg-surface: #1a1d27;
  --bg-elevated: #242836;
  --text: #e4e6ed;
  --text-muted: #8b8fa3;
  --accent: #6c8cff;
  --accent-dim: #4a6ad4;
  --border: #2e3242;
  --success: #4ade80;
  --warning: #fbbf24;
  --error: #f87171;
  --mono-font: 'SF Mono', 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  --body-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius: 8px;
  --transition: 0.2s ease;
}

[data-theme="light"] {
  --bg: #f5f6fa;
  --bg-surface: #ffffff;
  --bg-elevated: #eef0f5;
  --text: #1a1d27;
  --text-muted: #6b7085;
  --accent: #4a6ad4;
  --accent-dim: #3a57b5;
  --border: #d4d7e0;
  --success: #16a34a;
  --warning: #d97706;
  --error: #dc2626;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--body-font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

/* --- Layout --- */

.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  gap: 1rem;
}

header h1 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

header h1 span {
  color: var(--accent);
}

/* --- Theme Toggle --- */

.theme-toggle {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  font-size: 0.8rem;
  transition: background var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.theme-toggle:hover {
  border-color: var(--accent);
}

/* --- Drop Zone --- */

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  background: var(--bg-surface);
  position: relative;
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--accent);
  background: var(--bg-elevated);
}

.drop-zone p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.drop-zone input[type="file"] {
  display: none;
}

/* --- Buttons --- */

.btn-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  font-family: var(--body-font);
}

.btn:hover {
  border-color: var(--accent);
  background: var(--bg-surface);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
}

/* --- Status Bar --- */

.status-bar {
  margin-top: 1rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-family: var(--mono-font);
  color: var(--text-muted);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  min-height: 2rem;
  display: flex;
  align-items: center;
}

.status-bar.error {
  color: var(--error);
  border-color: var(--error);
}

.status-bar.success {
  color: var(--success);
  border-color: var(--success);
}

/* --- Results Panel --- */

.results {
  margin-top: 1.5rem;
}

.result-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  transition: border-color var(--transition);
}

.result-card h2 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* --- Definition List --- */

.info-grid {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.35rem 1rem;
  font-size: 0.85rem;
}

.info-grid dt {
  color: var(--text-muted);
  white-space: nowrap;
}

.info-grid dd {
  font-family: var(--mono-font);
  font-size: 0.82rem;
  word-break: break-all;
}

/* --- Tags / Badges --- */

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
  font-family: var(--mono-font);
}

.badge-on {
  background: color-mix(in srgb, var(--success) 20%, transparent);
  color: var(--success);
}

.badge-off {
  background: color-mix(in srgb, var(--text-muted) 15%, transparent);
  color: var(--text-muted);
}

.badge-warn {
  background: color-mix(in srgb, var(--warning) 20%, transparent);
  color: var(--warning);
}

/* --- Flags List --- */

.flags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
}

/* --- Hosts / Layers Tables --- */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  margin-top: 0.5rem;
}

.data-table th {
  text-align: left;
  color: var(--text-muted);
  font-weight: 500;
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.data-table td {
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono-font);
  font-size: 0.8rem;
}

.data-table tr:last-child td {
  border-bottom: none;
}

/* --- Hex Display --- */

.hex {
  font-family: var(--mono-font);
  font-size: 0.8rem;
  color: var(--accent);
}

/* --- QR Scanner --- */

.scanner-container {
  margin-top: 1.5rem;
  display: none;
}

.scanner-container.active {
  display: block;
}

.scanner-video-wrap {
  position: relative;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  max-height: 360px;
}

.scanner-video-wrap video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scanner-video-wrap canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.scanner-controls {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

/* --- Evidence Viewer --- */

.evidence-section {
  margin-top: 0.75rem;
}

.evidence-section summary {
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--accent);
  padding: 0.4rem 0;
}

.evidence-section summary:hover {
  color: var(--accent-dim);
}

.evidence-hex {
  font-family: var(--mono-font);
  font-size: 0.75rem;
  line-height: 1.5;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  margin-top: 0.5rem;
  overflow-x: auto;
  white-space: pre;
  max-height: 200px;
  overflow-y: auto;
}

/* --- Empty State --- */

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 3rem 1rem;
  font-size: 0.9rem;
}

/* --- Loading Indicator --- */

.loading {
  display: inline-block;
  width: 0.75rem;
  height: 0.75rem;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-right: 0.4rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Responsive --- */

@media (max-width: 480px) {
  .app {
    padding: 1rem 0.75rem;
  }

  header h1 {
    font-size: 1.05rem;
  }

  .drop-zone {
    padding: 1.5rem 1rem;
  }

  .info-grid {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .info-grid dt {
    font-weight: 600;
    color: var(--text);
  }

  .info-grid dd {
    margin-bottom: 0.5rem;
  }

  .data-table {
    font-size: 0.75rem;
  }

  .data-table td,
  .data-table th {
    padding: 0.3rem 0.35rem;
  }

  .scanner-video-wrap {
    max-height: 280px;
  }
}