/* ============================================
   Suno Mastering — Claude Design
   ============================================ */

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

:root {
  --bg:        #1c1917;
  --bg2:       #292524;
  --bg3:       #332f2c;
  --border:    #44403c;
  --border2:   #3a3633;
  --accent:    #d97757;
  --accent2:   #e08560;
  --accent3:   #f0a882;
  --text:      #e7e5e4;
  --text2:     #a8a29e;
  --text3:     #78716c;
  --ok:        #6ab187;
  --warn:      #d4a843;
  --bad:       #e06c6c;
  --radius:    12px;
  --radius-sm: 8px;
}

html { font-size: 14px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Söhne', 'Segoe UI', system-ui, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

#app {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px 56px;
}

/* === Header === */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0 28px;
  border-bottom: 1px solid var(--border2);
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 12px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

h1 {
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.mode-tag {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--accent3);
  background: rgba(204, 120, 92, 0.12);
  border: 1px solid rgba(204, 120, 92, 0.3);
  padding: 3px 9px;
  border-radius: 20px;
  letter-spacing: 0.04em;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

#gpu-badge {
  font-size: 0.68rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 20px;
}
.badge-checking { color: var(--text3); background: var(--bg3); border: 1px solid var(--border); }
.badge-gpu      { color: var(--ok);   background: rgba(106,177,135,0.1); border: 1px solid rgba(106,177,135,0.35); }
.badge-cpu      { color: var(--text2); background: var(--bg3); border: 1px solid var(--border); }

.privacy-note { font-size: 0.7rem; color: var(--text3); }

/* === Cards === */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 16px;
}

.hidden { display: none !important; }

/* === Drop Zone === */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 60px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  margin-bottom: 16px;
}

.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(204, 120, 92, 0.04);
}

.drop-icon { font-size: 2.8rem; margin-bottom: 14px; }
.drop-title { font-size: 1.05rem; font-weight: 500; margin-bottom: 4px; }
.drop-sub   { color: var(--text3); font-size: 0.82rem; margin: 8px 0; }
.drop-formats { color: var(--text3); font-size: 0.72rem; margin-top: 14px; }

/* === File Info === */
.file-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}
.file-icon { font-size: 1.1rem; }
.file-name { font-size: 0.85rem; color: var(--text2); word-break: break-all; }

/* === Settings Grid === */
.settings-grid {
  display: grid;
  gap: 20px;
  margin-bottom: 24px;
}

.setting-item { display: flex; flex-direction: column; gap: 8px; }

.setting-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.mode-display {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
}

.mode-badge {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent3);
  background: rgba(204, 120, 92, 0.15);
  padding: 2px 10px;
  border-radius: 4px;
}

.mode-desc { font-size: 0.85rem; color: var(--text2); }

.select-input {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 10px 14px;
  font-size: 0.88rem;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b6862' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

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

/* Toggle */
.toggle-switch {
  display: flex;
  align-items: center;
  cursor: pointer;
  width: fit-content;
}

.toggle-switch input { display: none; }

.toggle-track {
  width: 40px;
  height: 22px;
  background: var(--border);
  border-radius: 11px;
  position: relative;
  transition: background 0.2s;
}

.toggle-switch input:checked + .toggle-track { background: var(--accent); }

.toggle-thumb {
  position: absolute;
  top: 3px; left: 3px;
  width: 16px; height: 16px;
  background: var(--text);
  border-radius: 50%;
  transition: transform 0.2s;
}

.toggle-switch input:checked + .toggle-track .toggle-thumb { transform: translateX(18px); }

.toggle-note {
  font-size: 0.72rem;
  color: var(--text3);
  margin-top: 4px;
}

/* === Buttons === */
.primary-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 13px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}
.primary-btn:hover  { background: var(--accent2); }
.primary-btn:active { transform: scale(0.98); }

.outline-btn {
  padding: 10px 20px;
  background: transparent;
  color: var(--text2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.outline-btn:hover { border-color: var(--accent); color: var(--accent3); }

/* === Progress === */
.progress-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
}
.progress-label { font-size: 0.88rem; color: var(--text2); }
.progress-pct   { font-size: 0.82rem; color: var(--accent3); font-weight: 600; }

.progress-track {
  width: 100%;
  height: 4px;
  background: var(--bg3);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 22px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent3));
  border-radius: 2px;
  width: 0%;
  transition: width 0.25s ease;
}

.phase-list {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.phase {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  color: var(--text3);
  padding: 4px 10px;
  border: 1px solid var(--border2);
  border-radius: 20px;
  transition: all 0.2s;
}

.phase.active {
  color: var(--accent3);
  border-color: rgba(204,120,92,0.5);
  background: rgba(204, 120, 92, 0.08);
}

.phase.done {
  color: var(--ok);
  border-color: rgba(106,177,135,0.4);
  background: rgba(106,177,135,0.07);
}

.phase-icon { font-size: 0.75rem; }
.phase.active .phase-icon::before { content: '●'; }
.phase.done   .phase-icon::before { content: '✓'; }
.phase:not(.active):not(.done) .phase-icon::before { content: '○'; }

/* === Visualizer === */
.viz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.viz-tabs { display: flex; gap: 4px; }

.viz-tab {
  padding: 4px 14px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text3);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.2s;
}
.viz-tab.active { color: var(--accent3); border-color: var(--accent); background: rgba(204,120,92,0.1); }

.viz-note { font-size: 0.72rem; color: var(--text3); }

#spectrum-canvas {
  width: 100%;
  height: 160px;
  border-radius: var(--radius-sm);
  background: var(--bg);
  display: block;
}

/* === Metrics === */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

@media (min-width: 480px) {
  .metrics-grid { grid-template-columns: repeat(4, 1fr); }
}

.metric-card {
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  padding: 14px 12px;
}

.metric-label {
  display: block;
  font-size: 0.67rem;
  font-weight: 600;
  color: var(--text3);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.metric-row {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.82rem;
}

.metric-row .before { color: var(--text3); }
.metric-row .arrow  { color: var(--text3); font-size: 0.72rem; }
.metric-row .after  { font-weight: 600; color: var(--text); }
.metric-row .after.ok   { color: var(--ok); }
.metric-row .after.warn { color: var(--warn); }
.metric-row .after.bad  { color: var(--bad); }

/* === Platform badges === */
.platform-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.badge {
  font-size: 0.68rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 20px;
  text-transform: capitalize;
}
.badge-ok { color: var(--ok);   background: rgba(106,177,135,0.1);  border: 1px solid rgba(106,177,135,0.35); }
.badge-ng { color: var(--text3); background: var(--bg3); border: 1px solid var(--border); }

/* === Processing proof === */
.processing-proof {
  background: rgba(106, 177, 135, 0.07);
  border: 1px solid rgba(106, 177, 135, 0.28);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 0.78rem;
  color: var(--text2);
  margin-bottom: 16px;
}
.processing-proof .proof-title {
  display: block;
  font-weight: 600;
  color: var(--ok);
  margin-bottom: 6px;
  font-size: 0.8rem;
}
.processing-proof ul { padding-left: 16px; }
@media (min-width: 520px) { .processing-proof ul { columns: 2; } }
.processing-proof li { margin-bottom: 2px; }
.processing-proof strong { color: var(--text); }

/* === Auto-tune info === */
.autotune-info {
  background: rgba(204, 120, 92, 0.07);
  border: 1px solid rgba(204, 120, 92, 0.22);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.78rem;
  color: var(--text2);
  margin-bottom: 16px;
}
.autotune-info strong { color: var(--accent3); }
.autotune-info ul { margin-top: 6px; padding-left: 16px; }
.autotune-info li { margin-bottom: 2px; }

/* === A/B Section === */
.ab-section {
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-bottom: 20px;
}

.ab-buttons {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
}

.ab-btn {
  flex: 1;
  padding: 9px 8px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text3);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.2s;
}

.ab-btn.active {
  color: var(--accent3);
  border-color: var(--accent);
  background: rgba(204, 120, 92, 0.12);
}

.ab-split-btn.active {
  color: #d4a843;
  border-color: #d4a843;
  background: rgba(212, 168, 67, 0.1);
}

.ab-note {
  font-size: 0.7rem;
  color: var(--text3);
  text-align: center;
  margin-bottom: 16px;
}

.playback-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.play-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  color: white;
  font-size: 1rem;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
.play-btn:hover { background: var(--accent2); }

#seek-bar-wrap { flex: 1; }

#seek-bar {
  position: relative;
  height: 4px;
  background: var(--bg);
  border-radius: 2px;
  cursor: pointer;
}

#seek-fill {
  position: absolute;
  top: 0; left: 0;
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  width: 0%;
  pointer-events: none;
}

#seek-thumb {
  position: absolute;
  top: 50%; left: 0%;
  transform: translate(-50%, -50%);
  width: 12px; height: 12px;
  background: var(--accent3);
  border-radius: 50%;
  pointer-events: none;
}

.time-display {
  font-size: 0.72rem;
  color: var(--text3);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  min-width: 80px;
  text-align: right;
}

/* === Actions === */
.action-row {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.download-wrap {
  display: flex;
  gap: 8px;
  flex: 1;
}

.format-select {
  background: #2a2420;
  color: #e8e0d8;
  border: 1px solid #3d3530;
  border-radius: 8px;
  padding: 0 10px;
  font-size: 0.82rem;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.format-select:focus {
  outline: none;
  border-color: #d97757;
}

@media (min-width: 480px) {
  .action-row { flex-direction: row; align-items: center; }
  .download-wrap .download-btn { flex: 1; }
}

/* === Footer === */
footer {
  text-align: center;
  padding: 28px 0 12px;
  font-size: 0.7rem;
  color: var(--text3);
  border-top: 1px solid var(--border2);
}

.footer-links {
  margin-top: 6px;
}

.footer-links a {
  color: var(--text3);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.footer-sep {
  margin: 0 6px;
}

/* === Device Warning === */
.device-warning {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  font-size: 0.8rem;
}

.device-warning.tier-low {
  background: rgba(224, 108, 108, 0.07);
  border: 1px solid rgba(224, 108, 108, 0.3);
  color: var(--text2);
}

.device-warning.tier-medium {
  background: rgba(212, 168, 67, 0.07);
  border: 1px solid rgba(212, 168, 67, 0.3);
  color: var(--text2);
}

.dw-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 1px; }
.device-warning strong { display: block; color: var(--text); margin-bottom: 2px; }
.dw-reason { font-size: 0.7rem; color: var(--text3); margin-left: 6px; }
.dw-desc { margin-top: 4px; color: var(--text3); font-size: 0.75rem; }
.dw-actions { margin-top: 8px; }

.outline-btn-sm {
  padding: 4px 12px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text2);
  font-size: 0.72rem;
  cursor: pointer;
}
.outline-btn-sm:hover { border-color: var(--accent); color: var(--accent3); }

.quality-mode-badge {
  display: inline-block;
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
  background: rgba(212, 168, 67, 0.1);
  border: 1px solid rgba(212, 168, 67, 0.35);
  color: var(--warn);
}

/* === Scrollbar === */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* === Font size toggle === */
.font-size-toggle { display: flex; gap: 3px; align-items: center; }

.font-size-btn {
  width: 26px;
  height: 22px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text3);
  font-size: 0.65rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.font-size-btn.active {
  color: var(--accent3);
  border-color: var(--accent);
  background: rgba(204, 120, 92, 0.1);
}

.font-size-btn:hover { border-color: var(--accent); color: var(--accent3); }

html.fs-small { font-size: 12px; }
html.fs-large  { font-size: 16px; }

/* === SNS Section === */
.sns-section-header { margin-bottom: 18px; }

.section-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.section-subtitle { font-size: 0.75rem; color: var(--text3); }

.sns-preset-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}

@media (min-width: 520px) {
  .sns-preset-grid { grid-template-columns: repeat(4, 1fr); }
}

.sns-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 12px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.sns-card:hover { border-color: var(--accent); background: rgba(204, 120, 92, 0.05); }

.sns-card.active {
  border-color: var(--accent);
  background: rgba(204, 120, 92, 0.1);
}

.sns-card.processing { opacity: 0.6; cursor: wait; pointer-events: none; }

.sns-card-icon { font-size: 1.3rem; }
.sns-card-name { font-size: 0.82rem; font-weight: 600; color: var(--text); }
.sns-card-spec { font-size: 0.68rem; color: var(--accent3); font-weight: 500; }
.sns-card-desc { font-size: 0.7rem; color: var(--text3); }

/* SNS Result */
.sns-result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.sns-result-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent3);
}

.sns-result-metrics { display: flex; gap: 6px; flex-wrap: wrap; }

.metric-chip {
  font-size: 0.68rem;
  font-weight: 500;
  padding: 3px 9px;
  border-radius: 20px;
  background: var(--bg3);
  border: 1px solid var(--border2);
  color: var(--text2);
}

/* SNS seek bar */
#sns-seek-bar-wrap { flex: 1; }

#sns-seek-bar {
  position: relative;
  height: 4px;
  background: var(--bg);
  border-radius: 2px;
  cursor: pointer;
}

#sns-seek-fill {
  position: absolute;
  top: 0; left: 0;
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  width: 0%;
  pointer-events: none;
}

#sns-seek-thumb {
  position: absolute;
  top: 50%; left: 0%;
  transform: translate(-50%, -50%);
  width: 12px; height: 12px;
  background: var(--accent3);
  border-radius: 50%;
  pointer-events: none;
}