/* ─── Design Tokens ──────────────────────────────────────────────────────── */
:root {
  --bg:          #07080f;
  --bg-2:        #0d0f1e;
  --bg-card:     #111328;
  --border:      #1c2040;
  --border-2:    #2a2f5a;
  --accent:      #8b5cf6;
  --accent-2:    #ec4899;
  --accent-glow: rgba(139,92,246,0.22);
  --text:        #e2e8f0;
  --text-2:      #94a3b8;
  --text-3:      #475569;
  --success:     #22c55e;
  --warning:     #f59e0b;
  --danger:      #ef4444;
  --radius:      10px;
  --radius-lg:   16px;
  --shadow:      0 4px 24px rgba(0,0,0,0.5);
  --shadow-lg:   0 8px 40px rgba(0,0,0,0.7);
  --font:        'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:   'JetBrains Mono', 'Fira Code', monospace;
  --sidebar-w:   260px;
  --transition:  0.2s ease;
}

/* ─── Reset & Base ────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { cursor: pointer; font-family: var(--font); }
input, select, textarea { font-family: var(--font); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ─── Layout ─────────────────────────────────────────────────────────────── */
#sidebar {
  width: var(--sidebar-w);
  min-height: 100vh;
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  overflow-y: auto;
  transition: transform var(--transition);
}

#main {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-width: 0;
  padding: 2rem;
  max-width: 900px;
}

/* ─── Sidebar ─────────────────────────────────────────────────────────────── */
a.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 1.5rem 1.25rem 1rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.5rem;
  text-decoration: none;
  color: inherit;
}
a.sidebar-logo:hover { text-decoration: none; }
.sidebar-logo svg { flex-shrink: 0; }
.sidebar-logo-text { font-size: 1.1rem; font-weight: 700; letter-spacing: -0.02em; }
.sidebar-logo-text span { color: var(--accent); }

.nav-section-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  padding: 0.75rem 1.25rem 0.25rem;
}

nav ul { list-style: none; padding: 0 0.5rem 0.5rem; }
.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius);
  color: var(--text-2);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  user-select: none;
}
.nav-link:hover { background: rgba(255,255,255,0.04); color: var(--text); text-decoration: none; }
.nav-link.active { background: var(--accent-glow); color: var(--accent); }
.nav-link .nav-icon { width: 18px; text-align: center; font-size: 1rem; flex-shrink: 0; }

.sidebar-footer {
  margin-top: auto;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-3);
}
.sidebar-copyright {
  margin-top: 0.6rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border);
  font-size: 0.7rem;
  color: var(--text-3);
}

/* Mobile header */
#mobile-header {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 56px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  z-index: 200;
  align-items: center;
  padding: 0 1rem;
  gap: 12px;
}
#menu-toggle {
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.4rem;
  padding: 4px;
}
.mobile-logo { font-weight: 700; font-size: 1rem; }
.mobile-logo span { color: var(--accent); }

/* ─── Home hero ──────────────────────────────────────────────────────────── */
.home-hero {
  padding: 2rem 0 1.5rem;
  text-align: center;
}
.home-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1rem;
}
.home-hero h1 .accent { color: var(--accent); }
.home-hero p {
  color: var(--text-2);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto 1.25rem;
  line-height: 1.65;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 0.5rem;
}
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  background: rgba(139,92,246,0.1);
  border: 1px solid rgba(139,92,246,0.25);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.02em;
}

/* ─── Tools grid ────────────────────────────────────────────────────────── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.tool-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.1rem;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.tool-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
  transform: translateY(-2px);
  text-decoration: none;
}
.card-icon { font-size: 1.75rem; line-height: 1; margin-bottom: 0.25rem; }
.card-title { font-size: 0.95rem; font-weight: 700; color: var(--text); }
.card-desc { font-size: 0.8rem; color: var(--text-2); line-height: 1.5; }

/* ─── Panel header ───────────────────────────────────────────────────────── */
.panel-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.panel-icon { font-size: 2.2rem; flex-shrink: 0; line-height: 1; margin-top: 0.1rem; }
.panel-header h1 {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 0.4rem;
}
.panel-desc { color: var(--text-2); font-size: 0.9rem; line-height: 1.6; }

/* ─── Breadcrumb ─────────────────────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-3);
  margin-bottom: 1.5rem;
}
.breadcrumb a { color: var(--text-2); }
.breadcrumb a:hover { color: var(--accent); }

/* ─── Drop zone ──────────────────────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--border-2);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  position: relative;
  margin-bottom: 1.5rem;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-glow);
}
.drop-zone input[type="file"] { display: none; }
.drop-icon { font-size: 2.5rem; margin-bottom: 0.75rem; }
.drop-text { font-size: 0.9rem; color: var(--text); margin-bottom: 0.3rem; }
.drop-text .browse-link { color: var(--accent); text-decoration: underline; cursor: pointer; }
.drop-hint { font-size: 0.75rem; color: var(--text-3); }

/* ─── Workspace ───────────────────────────────────────────────────────────── */
.workspace {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.workspace-content { padding: 1.5rem; }

.loading-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 3rem;
  color: var(--text-2);
  font-size: 0.9rem;
}
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--border-2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.error-msg {
  color: var(--danger);
  padding: 1rem 1.5rem;
  font-size: 0.875rem;
}

.file-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-2);
  background: var(--bg-2);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 1rem;
}

/* ─── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  transition: background var(--transition), opacity var(--transition), transform var(--transition);
  white-space: nowrap;
}
.btn:hover:not(:disabled) { transform: translateY(-1px); }
.btn:active:not(:disabled) { transform: none; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover:not(:disabled) { background: #7c3aed; }

.btn-secondary {
  background: var(--bg-2);
  color: var(--text);
  border: 1px solid var(--border-2);
}
.btn-secondary:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }

.btn-ghost {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border);
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
}
.btn-ghost:hover:not(:disabled) { color: var(--text); border-color: var(--border-2); }

.btn-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

/* ─── Subtitle editor / textarea ──────────────────────────────────────────── */
.sub-editor-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.sub-editor-col { display: flex; flex-direction: column; gap: 0.4rem; }
.sub-editor-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
}
.sub-textarea {
  width: 100%;
  min-height: 320px;
  background: var(--bg-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  padding: 0.75rem;
  resize: vertical;
  outline: none;
  transition: border-color var(--transition);
}
.sub-textarea:focus { border-color: var(--accent); }
.sub-textarea.output { color: var(--text-2); background: #090b15; }

.sub-controls {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.sub-controls-row {
  display: flex;
  align-items: flex-end;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ─── Form inputs ─────────────────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 0.35rem; }
.form-label { font-size: 0.8rem; font-weight: 600; color: var(--text-2); }

input[type="number"], input[type="text"] {
  background: var(--bg-2);
  border: 1px solid var(--border-2);
  border-radius: 6px;
  color: var(--text);
  padding: 0.45rem 0.75rem;
  font-size: 0.875rem;
}
input[type="number"] { width: 110px; }
input[type="number"]:focus, input[type="text"]:focus { border-color: var(--accent); outline: none; }

select {
  background: var(--bg-2);
  border: 1px solid var(--border-2);
  border-radius: 6px;
  color: var(--text);
  padding: 0.45rem 0.75rem;
  font-size: 0.875rem;
  cursor: pointer;
}
select:focus { border-color: var(--accent); outline: none; }

input[type="range"] {
  width: 100%;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border-2);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  cursor: pointer;
}

/* ─── Stat row ───────────────────────────────────────────────────────────── */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.75rem;
  margin: 0.75rem 0;
}
.stat-box {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.65rem 0.9rem;
}
.stat-label { font-size: 0.72rem; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.25rem; }
.stat-value { font-size: 1rem; font-weight: 700; font-family: var(--font-mono); color: var(--text); }
.stat-value.accent { color: var(--accent); }

/* ─── SEO sections ───────────────────────────────────────────────────────── */
.seo-section {
  margin-top: 2rem;
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.seo-section h2 {
  font-size: 1.05rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}
.seo-section h3 {
  font-size: 0.92rem;
  font-weight: 600;
  margin: 1rem 0 0.5rem;
  color: var(--text);
}
.seo-section p {
  color: var(--text-2);
  font-size: 0.9rem;
  line-height: 1.65;
  margin-bottom: 0.75rem;
}
.seo-list {
  margin: 0 0 0.9rem 1.1rem;
}
.seo-list li {
  color: var(--text-2);
  margin-bottom: 0.5rem;
  line-height: 1.5;
  font-size: 0.9rem;
}
.seo-list strong { color: var(--text); }
.seo-list a { color: var(--accent); }

/* ─── FAQ ────────────────────────────────────────────────────────────────── */
.faq-list details {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 0.8rem;
  margin-bottom: 0.55rem;
}
.faq-list summary {
  cursor: pointer;
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 600;
}
.faq-list summary::-webkit-details-marker { color: var(--accent); }
.faq-list p {
  margin: 0.55rem 0 0;
  color: var(--text-2);
  font-size: 0.84rem;
  background: transparent;
  border: none;
  padding: 0;
}

/* ─── Related tools grid ─────────────────────────────────────────────────── */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-top: 0.5rem;
}
.related-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition), transform var(--transition);
}
.related-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  text-decoration: none;
}
.related-icon { font-size: 1.4rem; flex-shrink: 0; }
.related-title { font-size: 0.85rem; font-weight: 600; color: var(--text); }
.related-desc { font-size: 0.76rem; color: var(--text-2); margin-top: 0.15rem; }

/* ─── Notes ──────────────────────────────────────────────────────────────── */
.note {
  display: flex;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.82rem;
  line-height: 1.5;
  margin-bottom: 1rem;
}
.note-info  { background: rgba(139,92,246,0.08); border: 1px solid rgba(139,92,246,0.2); color: #c4b5fd; }
.note-warn  { background: rgba(245,158,11,0.08);  border: 1px solid rgba(245,158,11,0.2);  color: #fcd34d; }
.note-ok    { background: rgba(34,197,94,0.08);   border: 1px solid rgba(34,197,94,0.2);   color: #86efac; }
.note-icon  { flex-shrink: 0; }

/* ─── VS table ───────────────────────────────────────────────────────────── */
.vs-table-wrap {
  overflow-x: auto;
  margin: 0.75rem 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.vs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.vs-table th {
  background: var(--bg-2);
  color: var(--text);
  font-weight: 600;
  padding: 0.65rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-2);
  white-space: nowrap;
}
.vs-table th:first-child { color: var(--text-3); width: 28%; }
.vs-table td {
  padding: 0.6rem 1rem;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  line-height: 1.5;
}
.vs-table td:first-child {
  font-weight: 600;
  color: var(--text);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.vs-table tr:last-child td { border-bottom: none; }
.vs-table tr:nth-child(odd) td { background: rgba(255,255,255,0.015); }

.vs-cta {
  margin-top: 2rem;
  padding: 1.5rem;
  background: rgba(139,92,246,0.07);
  border: 1px solid rgba(139,92,246,0.25);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.vs-cta p { font-size: 0.95rem; color: var(--text); line-height: 1.55; margin: 0; }
.vs-cta .btn { align-self: flex-start; }

/* ─── Section divider label ──────────────────────────────────────────────── */
.section-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-3);
  margin-bottom: 0.5rem;
}
hr.divider { border: none; border-top: 1px solid var(--border); margin: 1.25rem 0; }

/* ─── Success flash ──────────────────────────────────────────────────────── */
.success-flash {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--success);
  font-weight: 600;
}

/* ─── Subtitle preview ───────────────────────────────────────────────────── */
.sub-preview {
  background: #000;
  border-radius: var(--radius);
  padding: 1rem;
  margin-top: 1rem;
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid var(--border);
}
.sub-preview-item {
  display: flex;
  gap: 0.75rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 0.82rem;
}
.sub-preview-item:last-child { border-bottom: none; }
.sub-time {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  white-space: nowrap;
  flex-shrink: 0;
  padding-top: 0.1rem;
}
.sub-text { color: #e2e8f0; line-height: 1.5; }

/* ─── Format code block ──────────────────────────────────────────────────── */
.code-block {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-2);
  overflow-x: auto;
  white-space: pre;
  margin: 0.5rem 0;
}

/* ─── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  #sidebar { transform: translateX(-100%); box-shadow: var(--shadow-lg); }
  #sidebar.open { transform: translateX(0); }
  #main { margin-left: 0; padding: 1rem; padding-top: 72px; }
  #mobile-header { display: flex; }
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .sub-editor-wrap { grid-template-columns: 1fr; }
  .panel-header { flex-direction: column; gap: 0.5rem; }
  .related-grid { grid-template-columns: 1fr; }
}

@media (max-width: 440px) {
  .tools-grid { grid-template-columns: 1fr 1fr; }
  .badge-row { gap: 0.35rem; }
  .sub-controls-row { flex-direction: column; align-items: stretch; }
}

/* ─── Scrollbar ───────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ─── Utility ─────────────────────────────────────────────────────────────── */
[hidden] { display: none !important; }
.text-muted { color: var(--text-2); }
.text-accent { color: var(--accent); }
.text-mono { font-family: var(--font-mono); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.fade-in { animation: fadeIn 0.25s ease; }

/* ─── Compare pages ──────────────────────────────────────────────────────── */
.decision-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 0.75rem 0;
}
.decision-box {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}
.decision-box h3 {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.6rem;
  color: var(--accent);
}
.decision-box.alt h3 { color: var(--accent-2); }
.decision-box ul { margin-left: 1rem; }
.decision-box li {
  font-size: 0.85rem;
  color: var(--text-2);
  margin-bottom: 0.3rem;
  line-height: 1.5;
}

.cta-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin: 1rem 0;
}

.format-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  background: rgba(139,92,246,0.12);
  color: var(--accent);
  border: 1px solid rgba(139,92,246,0.25);
  font-family: var(--font-mono);
}
.format-pill.pink {
  background: rgba(236,72,153,0.1);
  color: var(--accent-2);
  border-color: rgba(236,72,153,0.25);
}

@media (max-width: 600px) {
  .decision-grid { grid-template-columns: 1fr; }
}