/* === CSS Variables & Reset === */
:root {
  --bg-primary: #0f1117;
  --bg-secondary: #161822;
  --bg-tertiary: #1c1f2e;
  --bg-card: #1e2035;
  --bg-hover: #252842;
  --border: #2a2d45;
  --border-light: #353860;
  --text-primary: #e8eaf0;
  --text-secondary: #9ca3b8;
  --text-muted: #6b7280;
  --accent: #6366f1;
  --accent-hover: #7c7ff7;
  --accent-muted: rgba(99,102,241,0.15);
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --sidebar-w: 240px;
  --radius: 10px;
  --radius-sm: 6px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', -apple-system, sans-serif; background: var(--bg-primary); color: var(--text-primary); min-height: 100vh; overflow: hidden; }
input, select, textarea, button { font-family: inherit; }
.hidden { display: none !important; }

/* === Auth Screen === */
.auth-screen {
  display: flex; align-items: center; justify-content: center; min-height: 100vh;
  background: radial-gradient(ellipse at 50% 30%, rgba(99,102,241,0.12) 0%, var(--bg-primary) 70%);
}
.auth-card { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 16px; padding: 48px; width: 420px; max-width: 95vw; }
.auth-logo { text-align: center; margin-bottom: 32px; }
.auth-logo svg { margin-bottom: 16px; }
.auth-logo h1 { font-size: 24px; font-weight: 700; letter-spacing: -0.5px; }
.auth-subtitle { color: var(--text-secondary); font-size: 14px; margin-top: 8px; }
.auth-form label { display: block; font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; margin-top: 16px; }
.auth-form input, .auth-form select {
  width: 100%; padding: 10px 14px; background: var(--bg-tertiary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary); font-size: 14px; outline: none; transition: border-color 0.2s;
}
.auth-form input:focus, .auth-form select:focus { border-color: var(--accent); }
#auth-btn {
  width: 100%; padding: 12px; margin-top: 24px; background: var(--accent); color: #fff; border: none;
  border-radius: var(--radius-sm); font-size: 15px; font-weight: 600; cursor: pointer; transition: background 0.2s;
}
#auth-btn:hover { background: var(--accent-hover); }
.auth-hint { font-size: 12px; color: var(--text-muted); text-align: center; margin-top: 16px; line-height: 1.5; }

/* === Sidebar === */
.main-app { display: flex; height: 100vh; }
.sidebar {
  width: var(--sidebar-w); background: var(--bg-secondary); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; flex-shrink: 0;
}
.sidebar-header { display: flex; align-items: center; gap: 10px; padding: 20px 16px; border-bottom: 1px solid var(--border); }
.sidebar-title { font-size: 16px; font-weight: 700; }
.sidebar-nav { flex: 1; padding: 12px 8px; display: flex; flex-direction: column; gap: 4px; }
.nav-btn {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px; background: none; border: none;
  color: var(--text-secondary); border-radius: var(--radius-sm); cursor: pointer; font-size: 14px; width: 100%;
  text-align: left; transition: all 0.15s;
}
.nav-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-btn.active { background: var(--accent-muted); color: var(--accent); }
.nav-divider { height: 1px; background: var(--border); margin: 8px 4px; }
.sidebar-footer { padding: 16px; border-top: 1px solid var(--border); }
.workspace-info { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; line-height: 1.5; }
.logout-btn {
  width: 100%; padding: 8px; background: var(--bg-tertiary); border: 1px solid var(--border);
  color: var(--text-secondary); border-radius: var(--radius-sm); cursor: pointer; font-size: 13px; transition: all 0.15s;
}
.logout-btn:hover { border-color: var(--danger); color: var(--danger); }

/* === Content === */
.content { flex: 1; overflow-y: auto; padding: 0; }
.module-panel { padding: 28px 32px; }
.module-header { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.module-header h2 { font-size: 22px; font-weight: 700; }
.model-badge { background: var(--accent-muted); color: var(--accent); font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 20px; }
.module-body { display: flex; gap: 28px; }
.params-panel { width: 380px; flex-shrink: 0; }
.result-panel {
  flex: 1; min-height: 500px; background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius); display: flex; flex-wrap: wrap; align-items: flex-start; align-content: flex-start;
  justify-content: center; gap: 12px; padding: 20px; overflow-y: auto; max-height: calc(100vh - 140px);
}
.result-placeholder { color: var(--text-muted); font-size: 14px; align-self: center; text-align: center; width: 100%; padding: 100px 0; }

/* === Forms === */
.form-group { margin-bottom: 16px; }
.form-group label { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; }
.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }
input[type="text"], input[type="number"], input[type="password"], select, textarea {
  width: 100%; padding: 9px 12px; background: var(--bg-tertiary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary); font-size: 13px; outline: none; transition: border-color 0.2s; resize: vertical;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
.range-group { display: flex; align-items: center; gap: 10px; }
.range-group input[type="range"] { flex: 1; accent-color: var(--accent); }
.range-group span { font-size: 13px; font-weight: 600; color: var(--accent); min-width: 32px; }
.required { color: var(--danger); font-size: 11px; }

.generate-btn {
  width: 100%; padding: 12px; background: var(--accent); color: #fff; border: none;
  border-radius: var(--radius-sm); font-size: 14px; font-weight: 600; cursor: pointer; transition: all 0.2s; margin-top: 8px;
}
.generate-btn:hover { background: var(--accent-hover); transform: translateY(-1px); }
.generate-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.add-btn {
  padding: 8px 16px; background: var(--accent); color: #fff; border: none;
  border-radius: var(--radius-sm); font-size: 13px; font-weight: 600; cursor: pointer; transition: background 0.2s;
}
.add-btn:hover { background: var(--accent-hover); }
.tpl-pick-btn {
  background: var(--accent-muted); color: var(--accent); border: none; padding: 2px 8px;
  border-radius: 4px; font-size: 11px; cursor: pointer; transition: background 0.15s;
}
.tpl-pick-btn:hover { background: var(--accent); color: #fff; }

/* === Upload Zone === */
.upload-zone {
  border: 2px dashed var(--border); border-radius: var(--radius); padding: 24px; text-align: center;
  cursor: pointer; transition: all 0.2s; min-height: 120px; display: flex; align-items: center; justify-content: center;
}
.upload-zone:hover { border-color: var(--accent); background: var(--accent-muted); }
.upload-zone.has-image { padding: 8px; border-style: solid; }
.upload-content { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.upload-content span { font-size: 13px; color: var(--text-muted); }
.upload-content img { max-width: 100%; max-height: 200px; border-radius: var(--radius-sm); }

/* === Templates === */
.template-filters { display: flex; gap: 8px; margin-bottom: 20px; }
.filter-btn {
  padding: 6px 16px; background: var(--bg-tertiary); border: 1px solid var(--border);
  color: var(--text-secondary); border-radius: 20px; cursor: pointer; font-size: 13px; transition: all 0.15s;
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn.active { background: var(--accent-muted); border-color: var(--accent); color: var(--accent); }
.templates-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.template-card {
  background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; transition: all 0.15s; cursor: default;
}
.template-card:hover { border-color: var(--border-light); }
.template-card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 10px; }
.template-card-header h4 { font-size: 15px; font-weight: 600; }
.template-card-meta { display: flex; gap: 6px; margin-bottom: 10px; }
.meta-tag { font-size: 11px; padding: 2px 8px; border-radius: 10px; background: var(--bg-tertiary); color: var(--text-muted); }
.meta-tag.module { background: var(--accent-muted); color: var(--accent); }
.template-card-prompt { font-size: 13px; color: var(--text-secondary); line-height: 1.6; max-height: 80px; overflow: hidden; margin-bottom: 12px; }
.template-card-actions { display: flex; gap: 8px; }
.template-card-actions button {
  padding: 5px 12px; font-size: 12px; border-radius: 4px; cursor: pointer; border: 1px solid var(--border);
  background: var(--bg-tertiary); color: var(--text-secondary); transition: all 0.15s;
}
.template-card-actions button:hover { border-color: var(--accent); color: var(--accent); }
.template-card-actions button.del:hover { border-color: var(--danger); color: var(--danger); }

/* === History === */
.history-list { display: flex; flex-direction: column; gap: 12px; }
.history-item {
  background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 20px; display: flex; align-items: center; gap: 16px;
}
.history-item .module-tag { font-size: 11px; font-weight: 600; padding: 4px 10px; border-radius: 4px; background: var(--accent-muted); color: var(--accent); white-space: nowrap; }
.history-item .prompt-text { flex: 1; font-size: 13px; color: var(--text-secondary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.history-item .status-tag { font-size: 11px; padding: 4px 10px; border-radius: 4px; font-weight: 600; }
.status-PENDING, .status-RUNNING { background: rgba(245,158,11,0.15); color: var(--warning); }
.status-SUCCEEDED { background: rgba(34,197,94,0.15); color: var(--success); }
.status-FAILED { background: rgba(239,68,68,0.15); color: var(--danger); }
.history-item .time-text { font-size: 12px; color: var(--text-muted); white-space: nowrap; }

/* === Modal === */

/* === Color Palette === */
.toggle-switch { position: relative; display: inline-block; width: 36px; height: 20px; cursor: pointer; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0; background: var(--border); border-radius: 20px; transition: 0.2s;
}
.toggle-slider::before {
  content: ''; position: absolute; width: 16px; height: 16px; left: 2px; bottom: 2px;
  background: #fff; border-radius: 50%; transition: 0.2s;
}
.toggle-switch input:checked + .toggle-slider { background: var(--accent); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(16px); }

.palette-section { margin-top: 8px; }
.palette-list { display: flex; flex-direction: column; gap: 8px; }
.palette-row {
  display: flex; align-items: center; gap: 8px; padding: 6px 8px;
  background: var(--bg-tertiary); border: 1px solid var(--border); border-radius: var(--radius-sm);
}
.palette-row input[type="color"] {
  width: 32px; height: 32px; border: none; padding: 0; cursor: pointer;
  background: none; border-radius: 4px; overflow: hidden;
}
.palette-row input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.palette-row input[type="color"]::-webkit-color-swatch { border: 1px solid var(--border-light); border-radius: 4px; }
.palette-hex { width: 80px; font-size: 12px; font-family: monospace; text-align: center; padding: 4px 6px; }
.palette-ratio { width: 56px; font-size: 12px; text-align: center; padding: 4px 6px; }
.palette-ratio-label { font-size: 11px; color: var(--text-muted); }
.palette-del-btn {
  background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 16px;
  padding: 2px 6px; border-radius: 4px; transition: color 0.15s;
}
.palette-del-btn:hover { color: var(--danger); }

.palette-actions {
  display: flex; align-items: center; gap: 8px; margin-top: 8px;
}
.palette-add-btn, .palette-preset-btn {
  padding: 5px 12px; font-size: 12px; border-radius: 4px; cursor: pointer;
  border: 1px solid var(--border); background: var(--bg-tertiary); color: var(--text-secondary); transition: all 0.15s;
}
.palette-add-btn:hover, .palette-preset-btn:hover { border-color: var(--accent); color: var(--accent); }
.palette-ratio-sum {
  margin-left: auto; font-size: 12px; font-weight: 600;
}
.palette-ratio-sum.valid { color: var(--success); }
.palette-ratio-sum.invalid { color: var(--danger); }

.palette-presets {
  margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px;
}
.preset-item {
  display: flex; align-items: center; gap: 6px; padding: 6px 10px;
  background: var(--bg-tertiary); border: 1px solid var(--border); border-radius: 6px;
  cursor: pointer; font-size: 12px; color: var(--text-secondary); transition: all 0.15s;
}
.preset-item:hover { border-color: var(--accent); color: var(--accent); }
.preset-dots { display: flex; gap: 3px; }
.preset-dots span { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }

.modal { position: fixed; inset: 0; z-index: 1000; display: flex; align-items: center; justify-content: center; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px); }
.modal-content {
  position: relative; background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: 12px; width: 560px; max-width: 95vw; max-height: 80vh; overflow-y: auto;
}
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 18px 24px; border-bottom: 1px solid var(--border); }
.modal-header h3 { font-size: 17px; font-weight: 600; }
.modal-close { background: none; border: none; color: var(--text-muted); font-size: 24px; cursor: pointer; padding: 0 4px; }
.modal-close:hover { color: var(--text-primary); }
.modal-body { padding: 20px 24px; }

.template-picker-list { padding: 16px; display: flex; flex-direction: column; gap: 8px; max-height: 60vh; overflow-y: auto; }
.tpl-pick-item {
  padding: 12px 16px; background: var(--bg-tertiary); border: 1px solid var(--border); border-radius: var(--radius-sm);
  cursor: pointer; transition: all 0.15s;
}
.tpl-pick-item:hover { border-color: var(--accent); background: var(--bg-hover); }
.tpl-pick-item h4 { font-size: 14px; margin-bottom: 4px; }
.tpl-pick-item p { font-size: 12px; color: var(--text-muted); line-height: 1.5; max-height: 40px; overflow: hidden; }

/* === Toast === */
.toast {
  position: fixed; bottom: 24px; right: 24px; padding: 12px 20px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 13px; z-index: 2000;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3); transition: all 0.3s;
}
.toast.error { border-color: var(--danger); color: var(--danger); }
.toast.success { border-color: var(--success); color: var(--success); }

/* === Result items === */
.result-image { border-radius: var(--radius-sm); max-width: 48%; cursor: pointer; transition: transform 0.2s; }
.result-image:hover { transform: scale(1.02); }
.result-video { width: 100%; max-width: 640px; border-radius: var(--radius); }

/* === Loading Spinner === */
.loading-spinner {
  display: flex; flex-direction: column; align-items: center; gap: 16px; width: 100%; padding: 60px 0;
}
.spinner {
  width: 40px; height: 40px; border: 3px solid var(--border); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { font-size: 13px; color: var(--text-muted); }
.progress-text { font-size: 12px; color: var(--accent); font-weight: 500; }

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

/* === Responsive === */
@media (max-width: 900px) {
  .sidebar { width: 60px; }
  .sidebar-title, .nav-btn span, .sidebar-footer .workspace-info { display: none; }
  .nav-btn { justify-content: center; padding: 12px; }
  .module-body { flex-direction: column; }
  .params-panel { width: 100%; }
}