static/styles.css

/* ============================================================
   Viet AutoSub Editor – Dashboard Stylesheet
   Dark theme — Tương thích offline + HF Spaces online
   ============================================================ */

/* --- Tokens ------------------------------------------------- */
:root {
  --bg-base:    #0a0e1a;
  --bg-surface: #111827;
  --bg-raised:  #1a2236;
  --bg-input:   #0f1629;
  --border:     rgba(255,255,255,0.08);
  --border-focus: #6366f1;

  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted:     #64748b;

  --accent:       #6366f1;
  --accent-hover: #818cf8;
  --accent-glow:  rgba(99,102,241,0.25);

  --success:      #10b981;
  --success-bg:   rgba(16,185,129,0.12);
  --danger:       #ef4444;
  --danger-bg:    rgba(239,68,68,0.10);
  --warning:      #f59e0b;
  --warning-bg:   rgba(245,158,11,0.12);

  --radius-sm: 8px;
  --radius:    12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

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

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow:    0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
}

/* --- Reset -------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.55;
}

/* --- Offline Banner ----------------------------------------- */
.offline-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: linear-gradient(90deg, rgba(245,158,11,0.18), rgba(245,158,11,0.08));
  border-bottom: 1px solid rgba(245,158,11,0.3);
  color: #fde68a;
  font-size: 0.84rem;
  font-weight: 500;
  position: relative;
  z-index: 60;
}
.offline-banner-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: #f59e0b;
}
.offline-banner-close {
  margin-left: auto;
  background: none;
  border: none;
  color: #fde68a;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  opacity: 0.6;
  transition: opacity 0.2s;
  line-height: 1;
}
.offline-banner-close:hover {
  opacity: 1;
  background: rgba(245,158,11,0.15);
}

/* --- Top Nav ------------------------------------------------ */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,14,26,0.82);
  backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo-group {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-icon { width: 28px; height: 28px; color: var(--accent); }
.logo-text {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #818cf8, #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.topbar-right { display: flex; align-items: center; gap: 8px; }

/* --- Badges ------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.73rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: all 0.3s;
}
/* Online state (green) */
.badge-env.badge-online,
.badge-env:not(.badge-offline) {
  background: rgba(16,185,129,0.12);
  color: #6ee7b7;
  border: 1px solid rgba(16,185,129,0.25);
}
/* Offline state (amber/red) */
.badge-env.badge-offline {
  background: rgba(239,68,68,0.12);
  color: #fca5a5;
  border: 1px solid rgba(239,68,68,0.25);
}
.badge-model {
  background: rgba(99,102,241,0.12);
  color: #a5b4fc;
  border: 1px solid rgba(99,102,241,0.25);
  font-family: var(--font-mono);
}
.pulse-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
.pulse-dot.pulse-online {
  background: var(--success);
}
.pulse-dot.pulse-offline {
  background: var(--danger);
  animation: pulse-fast 1.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.35; }
}
@keyframes pulse-fast {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.25; }
}

/* --- Main Layout -------------------------------------------- */
.main {
  max-width: 1320px;
  margin: 0 auto;
  padding: 20px 24px 40px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* --- Step Indicator ----------------------------------------- */
.steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 14px 0 4px;
}
.step {
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0.38;
  transition: opacity 0.3s;
}
.step.active { opacity: 1; }
.step.done   { opacity: 0.7; }
.step-num {
  width: 28px; height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 0.78rem;
  font-weight: 700;
  background: var(--bg-raised);
  border: 1.5px solid var(--border);
  color: var(--text-secondary);
  transition: all 0.3s;
}
.step.active .step-num {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 12px var(--accent-glow);
}
.step.done .step-num {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
}
.step-label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}
.step.active .step-label { color: var(--text-primary); }
.step-line {
  width: 40px;
  height: 2px;
  background: var(--border);
  margin: 0 6px;
  flex-shrink: 0;
}

/* --- Panel (card) ------------------------------------------- */
.panel {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.panel-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}
.icon-sm  { width: 16px; height: 16px; flex-shrink: 0; }
.icon-xs  { width: 14px; height: 14px; }
.icon-btn { width: 16px; height: 16px; flex-shrink: 0; }

/* --- Upload Panel ------------------------------------------- */
.upload-panel { padding: 0; }
.drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 36px 24px;
  cursor: pointer;
  border: 2px dashed transparent;
  transition: all 0.25s;
  background: linear-gradient(180deg, rgba(99,102,241,0.04), transparent);
}
.drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(99,102,241,0.08);
}
.drop-icon { width: 44px; height: 44px; color: var(--accent); opacity: 0.7; }
.drop-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}
.drop-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.file-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: rgba(99,102,241,0.06);
  border-top: 1px solid var(--border);
}
.file-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 500;
}
.file-icon { width: 16px; height: 16px; color: var(--accent); }
.file-size {
  color: var(--text-muted);
  font-size: 0.78rem;
  font-family: var(--font-mono);
}

/* --- Two-column Grid ---------------------------------------- */
.grid-two {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 18px;
}
@media (max-width: 960px) {
  .grid-two { grid-template-columns: 1fr; }
  .steps { flex-wrap: wrap; gap: 4px; }
  .step-label { display: none; }
}

/* --- Video -------------------------------------------------- */
.video-panel .panel-head + * { padding: 0; }
.video-wrap {
  position: relative;
  background: #000;
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
}
.video-wrap video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: none;
}
.video-wrap video.has-src { display: block; }
.video-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.video-placeholder.hidden { display: none; }
.placeholder-icon { width: 56px; height: 56px; opacity: 0.3; }

/* --- Action Panel ------------------------------------------- */
.action-panel { display: flex; flex-direction: column; max-height: 100%; }
.action-stack {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex: 1;
  overflow-y: auto;
  max-height: calc(100vh - 260px);
}
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2px 0;
}
.export-title {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

/* --- Buttons ------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  cursor: pointer;
  background: var(--bg-raised);
  color: var(--text-primary);
  transition: all 0.2s ease;
  white-space: nowrap;
}
.btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.btn:active:not(:disabled) {
  transform: translateY(0);
}
.btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
}
.btn-primary {
  background: var(--accent);
  border-color: transparent;
  color: #fff;
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-success {
  background: var(--success);
  border-color: transparent;
  color: #fff;
}
.btn-success:hover:not(:disabled) {
  background: #34d399;
  box-shadow: 0 4px 20px rgba(16,185,129,0.3);
}
.btn-outline {
  background: transparent;
  border-color: var(--border);
}
.btn-outline:hover:not(:disabled) {
  background: var(--bg-raised);
  border-color: rgba(255,255,255,0.15);
}
.btn-ghost {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 6px 10px;
}
.btn-ghost:hover:not(:disabled) {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}
.btn-danger-sm {
  background: var(--danger-bg);
  border: 1px solid rgba(239,68,68,0.25);
  color: #fca5a5;
  padding: 6px 10px;
  font-size: 0.78rem;
}
.btn-danger-sm:hover:not(:disabled) {
  background: rgba(239,68,68,0.2);
}
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }
.btn-lg { padding: 12px 20px; font-size: 0.92rem; }
.btn-full { width: 100%; }
.btn-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* --- Progress ----------------------------------------------- */
.progress-wrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.progress-bar {
  height: 6px;
  background: var(--bg-raised);
  border-radius: 99px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), #818cf8);
  border-radius: 99px;
  transition: width 0.4s ease;
  animation: progressPulse 1.5s ease-in-out infinite;
}
@keyframes progressPulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.6; }
}
.progress-text {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* --- Status Box --------------------------------------------- */
.status-box {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 0.83rem;
  font-weight: 500;
  transition: all 0.3s;
}
.status-icon { width: 16px; height: 16px; flex-shrink: 0; }
.status-idle {
  background: rgba(255,255,255,0.03);
  color: var(--text-secondary);
}
.status-loading {
  background: var(--warning-bg);
  color: #fde68a;
}
.status-success {
  background: var(--success-bg);
  color: #6ee7b7;
}
.status-error {
  background: var(--danger-bg);
  color: #fca5a5;
}

/* --- Download Links ----------------------------------------- */
.download-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.dl-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
}
.dl-srt {
  background: rgba(99,102,241,0.12);
  color: #a5b4fc;
  border: 1px solid rgba(99,102,241,0.25);
}
.dl-srt:hover { background: rgba(99,102,241,0.2); }
.dl-mp4 {
  background: rgba(16,185,129,0.12);
  color: #6ee7b7;
  border: 1px solid rgba(16,185,129,0.25);
}
.dl-mp4:hover { background: rgba(16,185,129,0.2); }
.dl-link.disabled { pointer-events: none; opacity: 0.35; }

/* --- Table -------------------------------------------------- */
.table-panel { }
.table-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}
.seg-count {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  font-family: var(--font-mono);
  background: var(--bg-raised);
  padding: 3px 10px;
  border-radius: 999px;
}
.table-scroll {
  overflow-x: auto;
  max-height: 480px;
  overflow-y: auto;
}
table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}
thead { position: sticky; top: 0; z-index: 5; }
th {
  text-align: left;
  padding: 10px 14px;
  font-size: 0.73rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: var(--bg-raised);
  border-bottom: 1px solid var(--border);
}
td {
  padding: 8px 14px;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.02); }
.col-idx  { width: 48px; text-align: center; }
.col-time { width: 155px; }
.col-text { }
.col-act  { width: 72px; text-align: center; }

/* Row index number */
td.idx-cell {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* --- Table Inputs ------------------------------------------- */
.time-input, .text-input {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text-primary);
  padding: 8px 10px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.time-input:focus, .text-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.text-input {
  font-family: var(--font-sans);
  resize: vertical;
  min-height: 54px;
  line-height: 1.45;
}

/* --- Empty State -------------------------------------------- */
.empty-row td { padding: 40px 20px; }
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  text-align: center;
}
.empty-icon { width: 48px; height: 48px; opacity: 0.35; }
.empty-state p { font-size: 0.85rem; max-width: 380px; }

/* --- CVNSS Toggle Button ------------------------------------ */
.btn-cvnss {
  background: rgba(168,85,247,0.12);
  border: 1px solid rgba(168,85,247,0.3);
  color: #c4b5fd;
  font-weight: 700;
  font-size: 0.73rem;
  letter-spacing: 0.03em;
  transition: all 0.2s;
}
.btn-cvnss:hover:not(:disabled) {
  background: rgba(168,85,247,0.22);
  border-color: rgba(168,85,247,0.45);
  box-shadow: 0 2px 10px rgba(168,85,247,0.2);
}
.btn-cvnss.cvnss-active {
  background: rgba(168,85,247,0.3);
  border-color: #a855f7;
  color: #e9d5ff;
  box-shadow: 0 0 12px rgba(168,85,247,0.25);
}

/* --- Footer ------------------------------------------------- */
.footer {
  text-align: center;
  padding: 20px 24px;
  font-size: 0.75rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  line-height: 1.6;
}
.footer-link {
  color: var(--accent-hover);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s;
}
.footer-link:hover {
  color: #a5b4fc;
  text-decoration: underline;
}

/* --- Utilities ---------------------------------------------- */
[hidden] { display: none !important; }

/* --- Scrollbar ---------------------------------------------- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.1);
  border-radius: 99px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.18); }

/* --- Spinner for loading button ----------------------------- */
.btn-loading {
  position: relative;
  pointer-events: none;
  color: transparent !important;
}
.btn-loading::after {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Mode Selector ------------------------------------------ */
.mode-selector {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mode-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.mode-toggle {
  display: flex;
  gap: 6px;
  background: var(--bg-base);
  border-radius: var(--radius);
  padding: 4px;
  border: 1px solid var(--border);
}
.mode-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 12px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.mode-btn:hover:not(.active) {
  color: var(--text-primary);
  background: rgba(255,255,255,0.04);
}
.mode-btn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px var(--accent-glow);
}
.mode-btn .icon-btn {
  width: 14px;
  height: 14px;
}
.mode-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin: 0;
}

/* --- Coverage Bar ------------------------------------------- */
.coverage-bar {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.02);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.coverage-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.coverage-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.coverage-pct {
  font-size: 0.82rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-primary);
}
.coverage-track {
  height: 6px;
  background: var(--bg-raised);
  border-radius: 99px;
  overflow: hidden;
}
.coverage-fill {
  height: 100%;
  width: 0%;
  border-radius: 99px;
  transition: width 0.6s ease, background 0.3s;
}
.coverage-fill.cov-high {
  background: linear-gradient(90deg, var(--success), #34d399);
}
.coverage-fill.cov-mid {
  background: linear-gradient(90deg, var(--warning), #fbbf24);
}
.coverage-fill.cov-low {
  background: linear-gradient(90deg, var(--danger), #f87171);
}

/* --- Subtitle Preview Overlay ------------------------------- */
.sub-preview-overlay {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 10%;
  display: flex;
  justify-content: center;
  pointer-events: none;
  z-index: 10;
  transition: bottom 0.3s ease;
}
.sub-preview-text {
  display: inline-block;
  padding: 6px 18px;
  font-family: 'Bangers', sans-serif;
  font-size: 1.3rem;
  color: #fff;
  text-shadow: 0 0 6px rgba(0,0,0,0.9), 2px 2px 4px rgba(0,0,0,0.7);
  background: rgba(0,0,0,0.45);
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
  line-height: 1.4;
  text-align: center;
  max-width: 90%;
  word-break: break-word;
  transition: all 0.3s ease;
}
.sub-preview-text .ks-word-active {
  color: #FFD700;
  transition: color 0.15s;
}

/* --- Karaoke Style Panel ------------------------------------ */
.karaoke-style-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px;
  background: rgba(99,102,241,0.04);
  border: 1px solid rgba(99,102,241,0.12);
  border-radius: var(--radius);
}
.ks-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-hover);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0;
}
.ks-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.ks-label {
  font-size: 0.73rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Font select */
.ks-select {
  width: 100%;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background-color: var(--bg-input);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: border-color 0.2s;
  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='%2394a3b8' d='M2.5 4.5l3.5 3.5 3.5-3.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}
.ks-select option {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  padding: 6px 10px;
}
.ks-select:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Color pickers */
.ks-color-row {
  flex-direction: row;
  gap: 10px;
}
.ks-color-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.ks-color-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}
.ks-color-input {
  width: 32px;
  height: 32px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
  background: none;
  flex-shrink: 0;
}
.ks-color-input::-webkit-color-swatch-wrapper { padding: 2px; }
.ks-color-input::-webkit-color-swatch {
  border: none;
  border-radius: 4px;
}
.ks-color-hex {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Range sliders */
.ks-slider-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}
.ks-range {
  flex: 1;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--bg-raised);
  border-radius: 99px;
  outline: none;
  cursor: pointer;
}
.ks-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-surface);
  box-shadow: 0 0 6px var(--accent-glow);
  cursor: pointer;
  transition: transform 0.15s;
}
.ks-range::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}
.ks-range::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-surface);
  box-shadow: 0 0 6px var(--accent-glow);
  cursor: pointer;
}
.ks-range-val {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  min-width: 40px;
  text-align: right;
}

/* Toggle switch */
.ks-toggle-row {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}
.ks-switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}
.ks-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.ks-switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 99px;
  transition: all 0.25s;
}
.ks-switch-slider::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  left: 2px;
  bottom: 2px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: all 0.25s;
}
.ks-switch input:checked + .ks-switch-slider {
  background: var(--accent);
  border-color: var(--accent);
}
.ks-switch input:checked + .ks-switch-slider::before {
  transform: translateX(18px);
  background: #fff;
}

/* Hints */
.ks-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.3;
}
.ks-hint-karaoke {
  padding-left: 2px;
}

/* --- Responsive tweaks -------------------------------------- */
@media (max-width: 640px) {
  .main { padding: 12px 12px 32px; gap: 12px; }
  .topbar-inner { padding: 0 14px; }
  .drop-zone { padding: 24px 16px; }
  .action-stack { padding: 14px; }
  .btn-lg { padding: 10px 14px; font-size: 0.85rem; }
  table { min-width: 580px; }
  .panel-head { padding: 12px 14px; }
  .offline-banner { padding: 8px 14px; font-size: 0.78rem; }
  .mode-btn { padding: 6px 8px; font-size: 0.78rem; }
  .ks-color-row { flex-direction: column; }
  .sub-preview-text { font-size: 1rem; }
}