/* ═══════════════════════════════════════════════════════════════════════════════
   Video Compiler — Design System
   Dark-mode glassmorphism inspired by the original Streamlit design
   ═══════════════════════════════════════════════════════════════════════════════ */

/* ── Custom Properties ───────────────────────────────────────────────────────── */
:root {
  --bg-base:      #0a0a0f;
  --bg-mid:       #111827;
  --bg-surface:   rgba(255,255,255,0.04);
  --bg-surface-2: rgba(255,255,255,0.07);
  --border:       rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.16);

  --accent-purple: #6366f1;
  --accent-blue:   #60a5fa;
  --accent-green:  #34d399;
  --accent-red:    #ef4444;
  --accent-yellow: #f59e0b;

  --text-primary:   #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted:     #4b5563;

  --radius-sm:  0.4rem;
  --radius-md:  0.75rem;
  --radius-lg:  1rem;
  --radius-xl:  1.5rem;

  --shadow-glow: 0 0 32px rgba(99,102,241,0.2);
}

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

html { font-size: 16px; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: linear-gradient(135deg, var(--bg-base) 0%, var(--bg-mid) 60%, #0d1117 100%);
  min-height: 100vh;
  color: var(--text-primary);
  line-height: 1.6;
}

/* ── Typography ──────────────────────────────────────────────────────────────── */
h2 { font-size: 1.2rem; font-weight: 600; }
h3 { font-size: 1rem;   font-weight: 600; }
code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85em;
  background: rgba(99,102,241,0.15);
  color: #c4b5fd;
  padding: 0.1em 0.4em;
  border-radius: 0.3rem;
}
strong { font-weight: 600; }
a { color: inherit; text-decoration: none; }

/* ── Header / Hero ───────────────────────────────────────────────────────────── */
.app-header {
  background: linear-gradient(180deg, rgba(99,102,241,0.06) 0%, transparent 100%);
  border-bottom: 1px solid var(--border);
  padding: 2.5rem 1.5rem 2rem;
  text-align: center;
}
.hero-title {
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #a78bfa 0%, #60a5fa 50%, #34d399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.4rem;
}
.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 400;
}

/* ── Tab Bar ─────────────────────────────────────────────────────────────────── */
.tab-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 0.75rem 1rem;
  background: rgba(0,0,0,0.2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}
.tab-btn {
  padding: 0.55rem 1.4rem;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}
.tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
  border-color: var(--border);
}
.tab-btn.active {
  background: rgba(99,102,241,0.15);
  color: #a5b4fc;
  border-color: rgba(99,102,241,0.4);
  font-weight: 600;
}

/* ── Tab Content ─────────────────────────────────────────────────────────────── */
.main-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}
.tab-pane { display: none; }
.tab-pane.active { display: block; animation: fadeIn 0.25s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ── Card / Collapsible ──────────────────────────────────────────────────────── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
}
.collapsible summary { list-style: none; cursor: pointer; }
.collapsible summary::-webkit-details-marker { display: none; }
.collapsible-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  border-radius: var(--radius-lg);
  transition: background 0.15s ease;
}
.collapsible-header:hover { background: var(--bg-surface-2); }
details[open] > .collapsible-header {
  border-bottom: 1px solid var(--border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.card-body { padding: 1.25rem; }

/* ── Config grid ─────────────────────────────────────────────────────────────── */
.config-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 1.5rem;
}

/* ── Form controls ───────────────────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
select, input[type="text"], input[type="number"] {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.5rem 0.75rem;
  outline: none;
  transition: border-color 0.2s ease;
  width: 100%;
}
select:focus, input:focus { border-color: var(--accent-purple); }
input[type="range"] {
  width: 100%;
  accent-color: var(--accent-purple);
  padding: 0;
  border: none;
  background: transparent;
}
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 400;
  color: var(--text-primary);
  text-transform: none;
  letter-spacing: normal;
}
input[type="checkbox"] { accent-color: var(--accent-purple); width: 1rem; height: 1rem; }
.checkbox-text { font-weight: 500; }

/* ── Divider ─────────────────────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99,102,241,0.35), transparent);
  margin: 1.75rem 0;
}

/* ── Section labels ──────────────────────────────────────────────────────────── */
.section-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.4rem; }
.section-desc  { font-size: 0.875rem; color: var(--text-secondary); margin-bottom: 1.25rem; }

/* ── Upload zones ────────────────────────────────────────────────────────────── */
.upload-section { margin-bottom: 1.5rem; }
.upload-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}
.upload-zone {
  border: 1.5px dashed rgba(99,102,241,0.35);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
  background: rgba(255,255,255,0.02);
  min-height: 130px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  position: relative;
}
.upload-zone:hover, .upload-zone.dragging {
  border-color: rgba(99,102,241,0.7);
  background: rgba(99,102,241,0.05);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99,102,241,0.15);
}
.upload-zone-icon { font-size: 1.6rem; line-height: 1; }
.upload-zone-label { font-size: 0.82rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-secondary); }
.upload-zone-exts { font-size: 0.72rem; color: var(--text-muted); }
.upload-preview { display: flex; flex-wrap: wrap; gap: 0.3rem; justify-content: center; margin-top: 0.5rem; }

/* ── File badge ──────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  border-radius: 2rem;
  font-size: 0.72rem;
  font-weight: 500;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.badge-video  { background: rgba(239,68,68,0.15);   color: #fca5a5; border: 1px solid rgba(239,68,68,0.3); }
.badge-image  { background: rgba(34,197,94,0.15);   color: #86efac; border: 1px solid rgba(34,197,94,0.3); }
.badge-audio  { background: rgba(99,102,241,0.15);  color: #c4b5fd; border: 1px solid rgba(99,102,241,0.3); }

/* ── Save bar ─────────────────────────────────────────────────────────────────── */
.save-bar { display: flex; justify-content: center; margin-top: 1rem; }

/* ── Files grid ──────────────────────────────────────────────────────────────── */
.files-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.files-col-header {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

/* ── File row ────────────────────────────────────────────────────────────────── */
.file-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.32rem 0.6rem;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.025);
  border: 1px solid rgba(255,255,255,0.05);
  margin-bottom: 0.28rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  gap: 0.5rem;
}
.file-row-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
.file-row-size { font-size: 0.7rem; color: var(--text-muted); flex-shrink: 0; }
.clear-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.4rem;
}
.clear-count { font-size: 0.78rem; font-weight: 600; color: var(--text-muted); }
.empty-list  { font-size: 0.8rem; color: var(--text-muted); padding: 0.3rem 0; }

/* ── Rename ──────────────────────────────────────────────────────────────────── */
.rename-top-row { display: flex; align-items: flex-end; gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap; }
.mode-btns { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.mode-btn {
  padding: 0.35rem 0.9rem;
  font-size: 0.8rem;
  font-family: inherit;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}
.mode-btn:hover { border-color: var(--border-hover); color: var(--text-primary); }
.mode-btn.active {
  background: rgba(99,102,241,0.15);
  color: #a5b4fc;
  border-color: rgba(99,102,241,0.4);
  font-weight: 600;
}
.rename-params { margin-bottom: 1rem; }
.params-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.params-row .form-group { flex: 1; min-width: 150px; }

/* Preview table */
.preview-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
}
.preview-table th {
  text-align: left;
  padding: 0.35rem 0.75rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.preview-table td { padding: 0.3rem 0.75rem; border-bottom: 1px solid rgba(255,255,255,0.03); }
.preview-table tr:last-child td { border-bottom: none; }
.cell-old      { color: var(--text-secondary); text-decoration: line-through; opacity: 0.6; }
.cell-arrow    { color: var(--accent-purple); font-weight: 700; text-align: center; }
.cell-new      { color: #86efac; font-weight: 500; }
.cell-conflict { color: #fca5a5; }
.cell-unchanged { color: var(--text-muted); font-style: italic; }
.rename-info   { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 0.75rem; }

/* ── Stats row ───────────────────────────────────────────────────────────────── */
.stats-row { display: flex; gap: 1rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.stat-card {
  flex: 1;
  min-width: 100px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.2rem;
  text-align: center;
}
.stat-number { font-size: 1.8rem; font-weight: 700; margin-bottom: 0.2rem; }
.stat-label  { font-size: 0.72rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }

/* ── Buttons ─────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn:disabled { opacity: 0.35; cursor: not-allowed; pointer-events: none; }
.btn-primary, .btn-process {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: white;
  width: 100%;
  padding: 0.75rem;
  font-size: 1rem;
}
.btn-primary:hover, .btn-process:hover {
  background: linear-gradient(135deg, #818cf8, #6366f1);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(99,102,241,0.4);
}
.btn-save {
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  color: white;
  padding: 0.65rem 2rem;
}
.btn-save:hover {
  background: linear-gradient(135deg, #38bdf8, #0ea5e9);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(14,165,233,0.35);
}
.btn-apply {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  padding: 0.5rem 1.5rem;
  font-size: 0.88rem;
}
.btn-apply:hover {
  background: linear-gradient(135deg, #34d399, #10b981);
  box-shadow: 0 4px 14px rgba(16,185,129,0.35);
  transform: translateY(-1px);
}
.btn-download {
  background: rgba(99,102,241,0.15);
  color: #a5b4fc;
  border: 1px solid rgba(99,102,241,0.3);
  font-size: 0.85rem;
  padding: 0.45rem 1rem;
}
.btn-download:hover { background: rgba(99,102,241,0.25); }
.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  display: block;
  margin: 0 auto;
}
.btn-secondary:hover { background: var(--bg-surface-2); color: var(--text-primary); }
.btn-danger {
  background: rgba(239,68,68,0.12);
  color: #fca5a5;
  border: 1px solid rgba(239,68,68,0.3);
}
.btn-danger:hover { background: rgba(239,68,68,0.25); }
.btn-sm {
  padding: 0.4rem 0.85rem !important;
  font-size: 0.78rem !important;
}
/* Tiny delete button on file rows */
.btn-del {
  padding: 0.15rem 0.5rem;
  font-size: 0.72rem;
  background: rgba(239,68,68,0.1);
  color: #fca5a5;
  border: 1px solid rgba(239,68,68,0.25);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
  flex-shrink: 0;
  transition: background 0.15s ease;
}
.btn-del:hover { background: rgba(239,68,68,0.25); }

/* ── Process button wrap ─────────────────────────────────────────────────────── */
.process-btn-wrap { max-width: 480px; margin: 0 auto; }

/* ── Progress bar ────────────────────────────────────────────────────────────── */
.live-title { font-size: 1rem; font-weight: 600; margin-bottom: 1rem; }
.progress-wrap { margin-bottom: 1rem; }
.progress-track {
  height: 8px;
  background: rgba(255,255,255,0.06);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 0.4rem;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #6366f1, #34d399);
  border-radius: 99px;
  transition: width 0.4s ease;
}
.progress-label { font-size: 0.8rem; color: var(--text-secondary); }

/* ── Log box ─────────────────────────────────────────────────────────────────── */
.log-box {
  background: #0d1117;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  padding: 1rem 1.2rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.76rem;
  line-height: 1.75;
  max-height: 360px;
  overflow-y: auto;
  color: #cbd5e1;
}
.log-line { display: block; }
.log-info    { color: #94a3b8; }
.log-success { color: #86efac; }
.log-warning { color: #fcd34d; }
.log-error   { color: #fca5a5; }

/* ── Alert / Empty state ─────────────────────────────────────────────────────── */
.alert {
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  font-size: 0.88rem;
}
.alert-warning { background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.3); color: #fcd34d; }
.alert-success { background: rgba(34,197,94,0.1);  border: 1px solid rgba(34,197,94,0.3);  color: #86efac; }
.alert-error   { background: rgba(239,68,68,0.1);  border: 1px solid rgba(239,68,68,0.3);  color: #fca5a5; }

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ── Results ─────────────────────────────────────────────────────────────────── */
.result-item {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 0.4rem;
  font-size: 0.88rem;
}
.result-success { background: rgba(34,197,94,0.08);  border: 1px solid rgba(34,197,94,0.25);  color: #86efac; }
.result-error   { background: rgba(239,68,68,0.08);  border: 1px solid rgba(239,68,68,0.25);  color: #fca5a5; }
.result-warning { background: rgba(245,158,11,0.08); border: 1px solid rgba(245,158,11,0.25); color: #fcd34d; }

/* ── Output / Logs tab controls ──────────────────────────────────────────────── */
.controls-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}
.search-input {
  flex: 1;
  min-width: 180px;
  background: var(--bg-surface) !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--radius-md) !important;
  color: var(--text-primary) !important;
  font-family: inherit !important;
  font-size: 0.88rem !important;
  padding: 0.5rem 0.9rem !important;
}

/* ── Output / Log file rows ──────────────────────────────────────────────────── */
.output-row, .log-row-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.025);
  border: 1px solid rgba(255,255,255,0.05);
  margin-bottom: 0.3rem;
  font-size: 0.82rem;
}
.row-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-secondary);
}
.row-size { font-size: 0.7rem; color: var(--text-muted); flex-shrink: 0; }
.row-actions { display: flex; gap: 0.4rem; align-items: center; flex-shrink: 0; }
.log-content-box {
  background: #0d1117;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  padding: 0.75rem 1rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.73rem;
  line-height: 1.7;
  max-height: 300px;
  overflow-y: auto;
  color: #94a3b8;
  margin-bottom: 0.4rem;
  margin-top: -0.3rem;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ── Toasts ──────────────────────────────────────────────────────────────────── */
#toasts {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 9999;
}
.toast {
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 500;
  max-width: 340px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  animation: slideIn 0.25s ease;
}
@keyframes slideIn { from { opacity:0; transform:translateX(24px); } to { opacity:1; transform:none; } }
.toast-success { background: rgba(34,197,94,0.9);  color: #052e16; }
.toast-error   { background: rgba(239,68,68,0.9);  color: #fff; }
.toast-info    { background: rgba(99,102,241,0.9); color: #fff; }

/* ── Responsive ──────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .upload-grid, .files-grid, .config-grid { grid-template-columns: 1fr; }
  .stats-row { gap: 0.5rem; }
  .controls-row { flex-direction: column; align-items: stretch; }
  .search-input { min-width: unset !important; }
  .hero-title { font-size: 2rem; }
}