/* Mastering Lab — styles.css
   Implements docs/brandbook.md verbatim. Dark theme only (v1). */

:root {
  --bg-0: #0C0E12;
  --bg-1: #14171D;
  --bg-2: #1C2027;
  --border: #2A2F38;
  --text-1: #E8EAED;
  --text-2: #9AA1AB;
  --text-3: #5C636D;
  --accent: #4FD1C5;

  --ok: #3DDC84;
  --warn: #F5B942;
  --fail: #F25C54;
  --info: #6BA7F5;

  --font-ui: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --radius-card: 8px;
  --radius-btn: 6px;
  --radius-chip: 999px;

  --space-gutter: 24px;
  --space-card-pad: 20px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-0);
  color: var(--text-1);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.5;
}

.mono, .tabular {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.hidden { display: none !important; }

button {
  font-family: inherit;
  cursor: pointer;
}

/* ============ Buttons ============ */
.btn {
  height: 36px;
  padding: 0 16px;
  border-radius: var(--radius-btn);
  font-size: 0.875rem;
  font-weight: 500;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-1);
  transition: background 140ms ease-out, border-color 140ms ease-out;
}
.btn-ghost:hover { background: var(--bg-2); border-color: var(--text-2); }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0C0E12;
  font-weight: 600;
}
.btn-primary:hover { opacity: 0.9; }

/* ============ Wordmark ============ */
.upload-header {
  text-align: center;
  padding-top: 12vh;
}
.wordmark {
  font-family: var(--font-ui);
  font-weight: 600;
  letter-spacing: 0.08em;
  font-size: 2.5rem;
  color: var(--text-1);
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
}
.wordmark-tick {
  display: inline-block;
  width: 3px;
  height: 1.6rem;
  background: var(--accent);
  border-radius: 2px;
  transform: skewX(-12deg);
}
.wordmark-subtitle {
  margin: 6px 0 0;
  color: var(--text-2);
  font-size: 0.875rem;
  letter-spacing: 0.02em;
}
.upload-tagline {
  margin: 20px 0 0;
  color: var(--text-2);
  font-size: 1rem;
}

/* ============ Dropzone ============ */
.dropzone {
  max-width: 640px;
  margin: 48px auto 0;
  min-height: 260px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
  background: var(--bg-1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: var(--space-card-pad);
  transition: border-color 140ms ease-out, background 140ms ease-out;
  outline: none;
}
.dropzone:hover, .dropzone:focus-visible, .dropzone.dragover {
  border-color: var(--accent);
  background: var(--bg-2);
}
.dropzone-idle { text-align: center; }
.dropzone-icon { color: var(--text-2); margin-bottom: 12px; }
.dropzone-title { font-size: 1.25rem; font-weight: 600; margin: 0 0 8px; }
.dropzone-sub { color: var(--text-2); font-size: 0.875rem; margin: 0; }

.dropzone-progress { width: 100%; max-width: 460px; text-align: center; }
.progress-filename { font-size: 1rem; margin: 0 0 12px; color: var(--text-1); }
.progress-track {
  height: 4px;
  background: var(--bg-2);
  border-radius: 2px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 140ms ease-out;
}
.progress-pct { font-family: var(--font-mono); color: var(--text-2); font-size: 0.75rem; margin: 6px 0 16px; }

.stage-list { list-style: none; margin: 0; padding: 0; text-align: left; }
.stage-list li {
  padding: 6px 0;
  font-size: 0.875rem;
  color: var(--text-3);
  display: flex;
  align-items: center;
  gap: 8px;
}
.stage-list li.active { color: var(--text-1); }
.stage-list li.done { color: var(--text-2); }
.stage-list li.done::before { content: "✓"; color: var(--ok); }
.stage-list li.active::before { content: "…"; color: var(--accent); }
.stage-list li.pending::before { content: "·"; color: var(--text-3); }
.stage-list li.error::before { content: "✗"; color: var(--fail); }

.dropzone-error { text-align: center; max-width: 420px; }
.error-title { color: var(--fail); font-weight: 600; margin: 0 0 8px; }
.error-detail { color: var(--text-2); font-size: 0.875rem; margin: 0 0 16px; }

.recent-list {
  max-width: 640px;
  margin: 20px auto 0;
  text-align: center;
}
.recent-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-chip);
  background: var(--bg-1);
  color: var(--text-2);
  font-size: 0.875rem;
  margin: 4px;
}
.recent-item:hover { border-color: var(--accent); color: var(--text-1); }
.recent-item .recent-name { font-family: var(--font-mono); color: var(--text-1); }

/* ============ Topbar (shared grid/detail) ============ */
.topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px var(--space-gutter);
  border-bottom: 1px solid var(--border);
  background: var(--bg-1);
}
.topbar-info { display: flex; align-items: center; gap: 10px; flex: 1; min-width: 0; }
.topbar-filename { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.topbar-sep { color: var(--text-3); }
.topbar-metric { color: var(--text-2); font-size: 0.875rem; }

.tabs { display: flex; gap: 4px; }
.tab {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-2);
  padding: 8px 16px;
  border-radius: var(--radius-btn);
  font-size: 0.875rem;
  font-weight: 500;
  transition: background 140ms ease-out, color 140ms ease-out;
}
.tab.active { background: var(--bg-2); color: var(--text-1); border-color: var(--accent); }

/* ============ Platform Grid ============ */
.tab-panel { padding: var(--space-gutter); }

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
@media (max-width: 1279px) {
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .platform-grid { grid-template-columns: 1fr; }
}

.platform-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--space-card-pad);
  cursor: pointer;
  transition: background 140ms ease-out, border-color 140ms ease-out;
}
.platform-card:hover {
  background: var(--bg-2);
  border-color: var(--accent);
}
.card-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-3);
}
.card-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 4px 0 2px;
}
.card-target {
  color: var(--text-2);
  font-size: 0.875rem;
  margin-bottom: 12px;
}
.card-turndown {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 10px;
}
.card-turndown .unit { font-size: 0.6em; color: var(--text-2); font-weight: 400; }
.card-badges { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; min-height: 24px; }
.card-codec {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-2);
}
.card-codec .approx { color: var(--warn); }

.card-skeleton .skel-line {
  height: 14px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--bg-2) 25%, #262b34 37%, var(--bg-2) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
  margin-bottom: 10px;
}
@media (prefers-reduced-motion: reduce) {
  .card-skeleton .skel-line { animation: none; }
}
.skel-line.w60 { width: 60%; }
.skel-line.w40 { width: 40%; }
.skel-line.w80 { width: 80%; height: 28px; }
.card-stage {
  color: var(--text-2);
  font-size: 0.75rem;
  font-style: normal;
}
.card-error { color: var(--fail); font-size: 0.875rem; }

@keyframes shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* verdict chips */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 24px;
  padding: 0 10px;
  border-radius: var(--radius-chip);
  font-size: 0.75rem;
  font-weight: 500;
}
.chip-ok { background: rgba(61,220,132,0.15); color: var(--ok); }
.chip-warn { background: rgba(245,185,66,0.15); color: var(--warn); }
.chip-fail { background: rgba(242,92,84,0.15); color: var(--fail); }
.chip-info { background: rgba(107,167,245,0.15); color: var(--info); }

.rules-footer {
  color: var(--text-3);
  font-size: 0.75rem;
  margin-top: 20px;
}

/* ============ Platform Detail ============ */
.detail-topbar { gap: 16px; }
.detail-title { flex: 1; font-weight: 600; font-size: 1.25rem; }
.tier-selector { display: flex; gap: 4px; }
.tier-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-2);
  padding: 6px 12px;
  border-radius: var(--radius-btn);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}
.tier-btn.active { background: var(--bg-2); color: var(--text-1); border-color: var(--accent); }
.detail-turndown { font-size: 1.75rem; font-weight: 600; }

.detail-visuals {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: var(--space-gutter);
}
.visual-card {
  background: var(--bg-0);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  position: relative;
  overflow: hidden;
}
#waveform-canvas { display: block; width: 100%; height: 140px; }
.spectrogram-img { display: block; width: 100%; height: 160px; object-fit: fill; background: var(--bg-0); }
.spectrogram-playhead {
  position: absolute;
  top: 0; bottom: 0;
  width: 1px;
  background: var(--accent);
  left: 0;
  pointer-events: none;
}

.transport-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 var(--space-gutter) 12px;
  flex-wrap: wrap;
}

.abn-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: var(--radius-chip);
  overflow: hidden;
}
.abn-btn {
  background: transparent;
  border: none;
  color: var(--text-2);
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
}
.abn-btn .abn-label { font-size: 0.75rem; color: var(--text-3); }
.abn-btn.active {
  background: var(--accent);
  color: #0C0E12;
}
.abn-btn.active .abn-label { color: #0C0E12; opacity: 0.7; }

.transport-play {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text-1);
  display: flex; align-items: center; justify-content: center;
}
.transport-play:hover { border-color: var(--accent); }

.transport-time { color: var(--text-1); font-size: 0.875rem; }

.level-match-indicator {
  color: var(--ok);
  font-size: 0.875rem;
  font-weight: 500;
}

.loud-toggle { display: flex; align-items: center; gap: 8px; }
.loud-label { color: var(--text-2); font-size: 0.875rem; }

.chip-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-2);
  padding: 6px 12px;
  border-radius: var(--radius-chip);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}
.chip-btn.active { background: var(--bg-2); color: var(--text-1); border-color: var(--accent); }

.chain-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 var(--space-gutter) 16px;
}
.chain-row-label {
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-2);
}
.chain-toggle { display: flex; gap: 6px; }
.chain-toggle .chip-btn { text-transform: none; font-family: var(--font-ui); }

.warnings-panel {
  padding: 0 var(--space-gutter) 100px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.warning-row {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-left: 3px solid var(--info);
  border-radius: var(--radius-card);
  padding: 12px 16px;
  font-size: 0.9375rem;
  color: var(--text-1);
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.warning-row.sev-warn { border-left-color: var(--warn); }
.warning-row.sev-fail { border-left-color: var(--fail); }
.warning-row.sev-info { border-left-color: var(--info); }
.warning-icon { flex-shrink: 0; }
.warning-row.sev-warn .warning-icon { color: var(--warn); }
.warning-row.sev-fail .warning-icon { color: var(--fail); }
.warning-row.sev-info .warning-icon { color: var(--info); }
.warning-text .m { font-family: var(--font-mono); color: var(--text-1); }
.no-warnings { color: var(--text-2); font-size: 0.875rem; }

/* ============ Vinyl Report ============ */
.vinyl-check-list { list-style: none; margin: 0 0 20px; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.vinyl-check-row {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 14px 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
}
.vinyl-check-row:hover { border-color: var(--accent); }
.vinyl-check-name { font-weight: 600; min-width: 220px; }
.vinyl-check-summary { color: var(--text-2); font-size: 0.875rem; flex: 1; }
.vinyl-check-row.expanded { border-color: var(--accent); }

.vinyl-timeline-wrap {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 12px 16px;
  margin-bottom: 20px;
}
#vinyl-timeline-canvas { display: block; width: 100%; height: 40px; }

.vinyl-detail-area {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
#vinyl-band-chart { background: var(--bg-0); border: 1px solid var(--border); border-radius: var(--radius-card); }
.vinyl-detail-text { color: var(--text-2); font-size: 0.875rem; flex: 1; line-height: 1.7; }
.vinyl-detail-text .region { font-family: var(--font-mono); color: var(--text-1); }

/* ============ Mini-player ============ */
.mini-player {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: 56px;
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 var(--space-gutter);
  z-index: 50;
}
.mini-play {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text-1);
  display: flex; align-items: center; justify-content: center;
}
.mini-time { color: var(--text-2); font-size: 0.8125rem; }
.mini-source { color: var(--text-1); font-size: 0.875rem; font-weight: 500; }
.mini-chain { color: var(--text-2); font-size: 0.8125rem; margin-left: auto; }

/* ============ Shortcut overlay ============ */
.shortcut-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.shortcut-panel {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px;
  min-width: 320px;
  box-shadow: 0 8px 24px rgb(0 0 0 / 0.5);
}
.shortcut-panel h2 { margin: 0 0 16px; font-size: 1.25rem; }
.shortcut-panel ul { list-style: none; margin: 0 0 20px; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.shortcut-panel li { color: var(--text-2); font-size: 0.9375rem; }
kbd {
  display: inline-block;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-1);
}

/* ============ Screens ============ */
.screen { min-height: 100vh; padding-bottom: 56px; }
#screen-upload { padding-bottom: 0; }

/* jargon hover-def */
.term {
  border-bottom: 1px dotted var(--text-3);
  cursor: help;
  position: relative;
}