/* ── Variables ── */
:root {
  --color-bg: #0f0f13;
  --color-surface: #1a1a22;
  --color-border: #2e2e3e;
  --color-text: #e8e8f0;
  --color-muted: #7a7a9a;
  --color-accent: #7c6ff7;

  --color-human: #22c55e;
  --color-human-bg: #052e16;
  --color-human-border: #166534;

  --color-ai: #ef4444;
  --color-ai-bg: #2d0a0a;
  --color-ai-border: #7f1d1d;

  --color-unknown: #eab308;
  --color-unknown-bg: #2d2007;
  --color-unknown-border: #713f12;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Cascadia Code', 'Consolas', monospace;

  --max-width: 660px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 16px;
  line-height: 1.5;
}

/* ── Accessibility ── */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

/* ── Header ── */
.site-header {
  text-align: center;
  padding: 48px 0 32px;
  max-width: var(--max-width);
  width: 100%;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.logo-icon {
  font-size: 28px;
  color: var(--color-accent);
}

.logo-text {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.tagline {
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* ── Main ── */
.main {
  width: 100%;
  max-width: var(--max-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-bottom: 48px;
}

/* ── Search ── */
.search-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.search-form {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.search-row {
  display: flex;
  gap: 8px;
}

.search-input {
  flex: 1;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font);
  font-size: 0.95rem;
  padding: 12px 16px;
  outline: none;
  transition: border-color 0.15s;
}

.search-input::placeholder { color: var(--color-muted); }

.search-input:focus {
  border-color: var(--color-accent);
}

.search-btn {
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-md);
  color: #fff;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 22px;
  white-space: nowrap;
  transition: opacity 0.15s;
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
}

.search-btn:hover:not(:disabled) { opacity: 0.85; }
.search-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Spinner inside button */
.btn-spinner {
  display: none;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.is-loading .btn-spinner { display: block; }
.is-loading .btn-label { display: none; }

.search-error {
  color: var(--color-ai);
  font-size: 0.875rem;
  padding: 4px 4px;
}

.platform-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
}

.chip {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  color: var(--color-muted);
  font-size: 0.8rem;
  padding: 3px 12px;
}

/* ── States ── */
.state--idle {
  text-align: center;
  padding: 48px 0;
}

.idle-hint {
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* Loading */
.state--loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 48px 0;
  text-align: center;
}

.loading-spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-text {
  color: var(--color-muted);
  font-size: 0.95rem;
}

.loading-step {
  color: var(--color-muted);
  font-size: 0.8rem;
  min-height: 1.2em;
}

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

/* Error */
.state--error {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 48px 0;
  text-align: center;
}

.error-icon { font-size: 2rem; }

.error-message {
  color: var(--color-ai);
  font-size: 0.95rem;
  max-width: 360px;
}

/* ── Metadata card ── */
.metadata-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.metadata-art {
  flex-shrink: 0;
  width: 72px; height: 72px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
}

.art-placeholder {
  font-size: 1.8rem;
  color: var(--color-muted);
}

#result-art {
  width: 100%; height: 100%;
  object-fit: cover;
}

.metadata-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.meta-title {
  font-size: 1.05rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.meta-artist {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.meta-album {
  color: var(--color-muted);
  font-size: 0.85rem;
  font-style: italic;
}

.meta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.meta-tag {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 100px;
  background: var(--color-border);
  color: var(--color-muted);
}

.meta-tag--genre {
  background: #1a1a30;
  color: var(--color-accent);
  border: 1px solid #3a3a5a;
}

.meta-tag--type {
  background: #1a2230;
  color: #60a5fa;
  border: 1px solid #1e3a5a;
}

.mb-verify-link {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--color-muted);
  text-decoration: none;
  opacity: 0.75;
  transition: opacity 0.15s;
}
.mb-verify-link:hover { opacity: 1; color: var(--color-accent); }

/* ── Verdict badge ── */
.verdict-badge {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  border-radius: var(--radius-md);
  border: 1.5px solid;
  padding: 16px 20px;
  font-weight: 700;
  font-size: 1.1rem;
}

.verdict-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  padding-top: 2px;
}

.verdict-content {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

/* Score meter */
.score-meter {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.score-label {
  font-size: 0.78rem;
  font-weight: 400;
  opacity: 0.8;
}

.score-bar-track {
  height: 5px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 3px;
  overflow: hidden;
}

.score-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  background: currentColor;
  opacity: 0.7;
}

.verdict--human {
  background: var(--color-human-bg);
  border-color: var(--color-human-border);
  color: var(--color-human);
}

.verdict--ai {
  background: var(--color-ai-bg);
  border-color: var(--color-ai-border);
  color: var(--color-ai);
}

.verdict--unknown {
  background: var(--color-unknown-bg);
  border-color: var(--color-unknown-border);
  color: var(--color-unknown);
}

/* ── Signals ── */
.signals-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.signals-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.signals-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.signal-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
}

.signal-icon {
  flex-shrink: 0;
  font-size: 1rem;
  width: 20px;
  text-align: center;
}

.signal-item--positive .signal-icon { color: var(--color-human); }
.signal-item--negative .signal-icon { color: var(--color-ai); }
.signal-item--neutral .signal-icon { color: var(--color-muted); }

.signal-label { color: var(--color-text); }
.signal-detail { color: var(--color-muted); font-size: 0.8rem; }

/* ── Score breakdown ── */
.score-breakdown {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.score-breakdown-header {
  padding: 12px 16px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.score-breakdown-rows {
  display: flex;
  flex-direction: column;
}

.score-breakdown-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 16px;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
}

.breakdown-icon {
  flex-shrink: 0;
  width: 18px;
  text-align: center;
  font-size: 0.85rem;
}

.breakdown-label {
  flex: 1;
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.breakdown-detail {
  font-size: 0.775rem;
  color: var(--color-muted);
}

.breakdown-pts {
  flex-shrink: 0;
  font-weight: 600;
  font-size: 0.825rem;
  font-variant-numeric: tabular-nums;
}

.breakdown-pts--positive { color: var(--color-human); }
.breakdown-pts--negative { color: var(--color-ai); }
.breakdown-pts--blocker  { color: var(--color-ai); }
.breakdown-pts--neutral  { color: var(--color-muted); }

.score-breakdown-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 11px 16px;
  border-top: 2px solid var(--color-border);
  font-weight: 700;
  font-size: 0.9rem;
  background: color-mix(in srgb, var(--color-border) 40%, var(--color-surface));
}

.score-breakdown-threshold {
  padding: 8px 16px 10px;
  font-size: 0.78rem;
  color: var(--color-muted);
  font-style: italic;
  border-top: 1px solid var(--color-border);
}

/* ── Raw data ── */
.raw-details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.raw-summary {
  cursor: pointer;
  padding: 10px 14px;
  font-size: 0.85rem;
  color: var(--color-muted);
  user-select: none;
  background: var(--color-surface);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.raw-summary::before { content: '▶'; font-size: 0.6rem; transition: transform 0.2s; }
details[open] .raw-summary::before { transform: rotate(90deg); }

.raw-data {
  background: #0a0a10;
  color: #a0a0c0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 14px;
  overflow-x: auto;
  white-space: pre;
  max-height: 300px;
  overflow-y: auto;
}

/* ── Reset button ── */
.reset-btn {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.85rem;
  padding: 8px 14px;
  align-self: flex-start;
  transition: color 0.15s, border-color 0.15s;
}

.reset-btn:hover {
  color: var(--color-text);
  border-color: var(--color-accent);
}

/* ── Footer ── */
.site-footer {
  text-align: center;
  padding: 24px 0 32px;
  color: var(--color-muted);
  font-size: 0.8rem;
  max-width: var(--max-width);
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-top: 1px solid var(--color-border);
}

.site-footer a {
  color: var(--color-accent);
  text-decoration: none;
}

.site-footer a:hover { text-decoration: underline; }

.footer-note { color: #555; font-style: italic; }

/* ── State: Désambiguïsation ── */
.state--disambiguate {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 16px;
}

.disambig-heading {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: center;
}

.disambig-sub {
  font-size: 0.85rem;
  color: var(--color-muted);
  text-align: center;
  margin-top: -8px;
}

.disambig-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.disambig-card {
  width: 100%;
  text-align: left;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 3px;
  transition: border-color 0.15s, background 0.15s;
  font-family: var(--font);
  color: var(--color-text);
}

.disambig-card:hover,
.disambig-card:focus {
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 8%, var(--color-surface));
  outline: none;
}

.disambig-card-title {
  font-weight: 600;
  font-size: 1rem;
}

.disambig-card-artist {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.disambig-card-album {
  font-size: 0.8rem;
  color: var(--color-muted);
  font-style: italic;
}

.disambig-card-score {
  font-size: 0.75rem;
  color: var(--color-accent);
  margin-top: 4px;
}

.disambig-skip-btn {
  align-self: center;
  background: none;
  border: 1px dashed var(--color-border);
  color: var(--color-muted);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.8rem;
  transition: border-color 0.15s, color 0.15s;
}

.disambig-skip-btn:hover {
  border-color: var(--color-muted);
  color: var(--color-text);
}

/* ── Responsive ── */
@media (max-width: 500px) {
  .site-header { padding: 32px 0 20px; }
  .logo-text { font-size: 1.3rem; }
  .search-row { flex-direction: column; }
  .search-btn { width: 100%; justify-content: center; }
  .metadata-art { width: 56px; height: 56px; }
}