/* === RESET & VARIABLES === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root {
  /* Cinematic dark palette */
  --bg-deep: #0a0a0c;
  --bg-primary: #111114;
  --bg-secondary: #18181c;
  --bg-elevated: #1e1e24;
  --bg-hover: #252530;
  --bg-active: #2a2a38;

  --border: #2a2a32;
  --border-subtle: #1f1f28;
  --border-accent: #3d3d4a;

  --text-primary: #e8e6e3;
  --text-secondary: #8a8890;
  --text-tertiary: #5a5862;
  --text-accent: #c9a96e;

  --accent: #c9a96e;
  --accent-dim: #8a7448;
  --accent-glow: rgba(201,169,110,0.15);
  --accent-glow-strong: rgba(201,169,110,0.3);

  --red: #d4534b;
  --green: #5cb870;
  --blue: #5b8fd4;

  --font-display: 'Noto Serif SC', serif;
  --font-body: 'Noto Sans SC', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --sidebar-w: 280px;
  --topbar-h: 56px;
  --radius: 8px;
  --radius-lg: 12px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

html { font-size: 14px; }
body {
  font-family: var(--font-body);
  background: var(--bg-deep);
  color: var(--text-primary);
  overflow: hidden;
  height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* === FILM GRAIN === */
.film-grain {
  position: fixed; inset: 0; z-index: 9999;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-size: 128px;
}

/* === LAYOUT === */
.app-container {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* === SIDEBAR === */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--bg-primary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transition: transform 0.4s var(--ease-out), opacity 0.3s ease;
  z-index: 100;
}
.sidebar.hidden {
  transform: translateX(calc(-1 * var(--sidebar-w)));
  opacity: 0;
  min-width: 0;
  width: 0;
  overflow: hidden;
}

.sidebar-header {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
}
.sidebar-brand {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 500;
  color: var(--text-secondary);
}
.sidebar-brand svg { opacity: 0.5; }
.sidebar-close {
  background: none; border: none; color: var(--text-tertiary);
  cursor: pointer; padding: 4px;
  transition: color 0.2s;
}
.sidebar-close:hover { color: var(--text-primary); }

.history-list {
  flex: 1; overflow-y: auto; padding: 12px;
}
.history-empty {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; height: 200px; gap: 8px;
  color: var(--text-tertiary); text-align: center;
}
.history-empty svg { opacity: 0.3; margin-bottom: 4px; }
.history-empty p { font-size: 13px; color: var(--text-secondary); }
.history-empty span { font-size: 11px; }

.history-item {
  display: flex; gap: 10px; padding: 10px;
  border-radius: var(--radius); cursor: pointer;
  transition: background 0.2s;
  margin-bottom: 4px;
}
.history-item:hover { background: var(--bg-hover); }
.history-thumb {
  width: 48px; height: 48px; border-radius: 6px;
  object-fit: cover; flex-shrink: 0;
  border: 1px solid var(--border);
}
.history-info { flex: 1; min-width: 0; }
.history-type {
  font-size: 12px; font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.history-time { font-size: 11px; color: var(--text-tertiary); margin-top: 2px; }
.history-model {
  font-size: 10px; color: var(--accent-dim);
  font-family: var(--font-mono);
  margin-top: 4px;
}

/* === MAIN === */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* === TOPBAR === */
.topbar {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-primary);
  flex-shrink: 0;
}
.topbar-btn {
  background: none; border: none;
  color: var(--text-secondary); cursor: pointer;
  padding: 6px; border-radius: 6px;
  transition: all 0.2s;
}
.topbar-btn:hover { color: var(--text-primary); background: var(--bg-hover); }

.topbar-title { flex: 1; }
.topbar-title h1 {
  font-family: var(--font-display);
  font-size: 16px; font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}
.topbar-subtitle {
  font-family: var(--font-mono);
  font-size: 9px; letter-spacing: 0.2em;
  color: var(--text-tertiary);
  text-transform: uppercase;
}

.topbar-actions { display: flex; align-items: center; gap: 12px; }
.topbar-status {
  display: flex; align-items: center; gap: 6px;
  font-size: 11px; color: var(--text-tertiary);
  font-family: var(--font-mono);
}
.status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
  animation: pulse 2s ease infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* === SCROLLABLE CONTENT === */
.content-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  scroll-behavior: smooth;
}
.content-scroll::-webkit-scrollbar { width: 6px; }
.content-scroll::-webkit-scrollbar-track { background: transparent; }
.content-scroll::-webkit-scrollbar-thumb {
  background: var(--border); border-radius: 3px;
}

.workspace {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 28px 80px;
}

/* === PANELS === */
.panel {
  margin-bottom: 24px;
  animation: fadeInUp 0.5s var(--ease-out) both;
}
.panel:nth-child(2) { animation-delay: 0.06s; }
.panel:nth-child(3) { animation-delay: 0.12s; }
.panel:nth-child(4) { animation-delay: 0.18s; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-dim);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* === INPUT SECTION === */
.input-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.section-title {
  font-family: var(--font-display);
  font-size: 15px; font-weight: 600;
  margin-bottom: 4px;
}
.section-desc {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}

/* Upload zone */
.upload-zone {
  border: 1.5px dashed var(--border-accent);
  border-radius: var(--radius-lg);
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}
.upload-zone:hover {
  border-color: var(--accent-dim);
  background: var(--bg-elevated);
}
.upload-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-glow);
  box-shadow: inset 0 0 30px var(--accent-glow);
}

.upload-placeholder {
  display: flex; flex-direction: column;
  align-items: center; gap: 8px;
  color: var(--text-tertiary);
  padding: 20px;
  text-align: center;
}
.upload-placeholder svg { opacity: 0.4; }
.upload-placeholder span { font-size: 12px; }
.upload-hint { font-size: 11px !important; color: var(--text-tertiary); opacity: 0.6; }

.upload-previews {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 12px;
  width: 100%;
}
.upload-previews:empty { display: none; }
.upload-previews:not(:empty) + .upload-placeholder { display: none; }

.preview-item {
  position: relative;
  width: 72px; height: 72px;
  border-radius: 8px; overflow: hidden;
  border: 1px solid var(--border);
  animation: scaleIn 0.3s var(--ease-spring);
}
@keyframes scaleIn {
  from { transform: scale(0.8); opacity: 0; }
}
.preview-item img {
  width: 100%; height: 100%; object-fit: cover;
}
.preview-remove {
  position: absolute; top: 2px; right: 2px;
  width: 18px; height: 18px;
  background: rgba(0,0,0,0.7); border: none;
  border-radius: 50%; color: #fff;
  font-size: 10px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity 0.2s;
}
.preview-item:hover .preview-remove { opacity: 1; }

.preview-label {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: rgba(0,0,0,0.6);
  font-size: 9px; text-align: center;
  padding: 2px; color: var(--text-secondary);
}

.add-more-btn {
  width: 72px; height: 72px;
  border: 1.5px dashed var(--border-accent);
  border-radius: 8px; background: none;
  color: var(--text-tertiary); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; transition: all 0.2s;
}
.add-more-btn:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
}

/* Textarea */
.desc-textarea {
  width: 100%;
  min-height: 120px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 14px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.7;
  resize: vertical;
  transition: border-color 0.2s;
}
.desc-textarea::placeholder { color: var(--text-tertiary); }
.desc-textarea:focus {
  outline: none;
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Quick tags */
.quick-tags { margin-top: 10px; }
.tag-label {
  font-size: 11px; color: var(--text-tertiary);
  display: block; margin-bottom: 6px;
}
.tags-wrap { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  padding: 4px 10px;
  font-size: 11px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-body);
}
.tag:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
  background: var(--accent-glow);
}

/* === SETTINGS === */
.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.setting-label {
  font-size: 11px;
  color: var(--text-tertiary);
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 10px;
  display: block;
}

/* Model selector */
.model-selector { display: flex; flex-direction: column; gap: 6px; }
.model-btn {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
  color: var(--text-secondary);
  font-family: var(--font-body);
}
.model-btn:hover { border-color: var(--border-accent); }
.model-btn.active {
  border-color: var(--accent-dim);
  background: var(--accent-glow);
  color: var(--text-primary);
}
.model-icon { font-size: 14px; }
.model-name { font-size: 12px; flex: 1; text-align: left; }
.model-tag {
  font-size: 9px; padding: 1px 5px;
  background: var(--accent-dim);
  color: var(--bg-deep);
  border-radius: 3px;
  font-weight: 600;
}
.model-btn:not(.active) .model-tag { background: var(--border-accent); color: var(--text-tertiary); }

/* Ratio selector */
.ratio-selector { display: flex; gap: 6px; }
.ratio-btn {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; gap: 6px;
  padding: 8px 4px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer; transition: all 0.2s;
  color: var(--text-secondary);
  font-size: 10px;
  font-family: var(--font-mono);
}
.ratio-btn:hover { border-color: var(--border-accent); }
.ratio-btn.active {
  border-color: var(--accent-dim);
  background: var(--accent-glow);
  color: var(--accent);
}

.ratio-preview {
  border: 1px solid currentColor;
  border-radius: 2px;
  opacity: 0.6;
}
.r-16-9 { width: 24px; height: 13px; }
.r-3-4 { width: 15px; height: 20px; }
.r-1-1 { width: 18px; height: 18px; }
.r-21-9 { width: 28px; height: 12px; }

/* Res & count selectors */
.res-selector, .count-selector { display: flex; gap: 6px; }
.res-btn, .count-btn, .scene-count-btn {
  flex: 1; padding: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer; transition: all 0.2s;
  color: var(--text-secondary);
  font-size: 12px;
  font-family: var(--font-mono);
}
.res-btn:hover, .count-btn:hover, .scene-count-btn:hover { border-color: var(--border-accent); }
.res-btn.active, .count-btn.active, .scene-count-btn.active {
  border-color: var(--accent-dim);
  background: var(--accent-glow);
  color: var(--accent);
}

/* === OUTPUT TABS === */
.output-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}
.output-tab {
  display: flex; align-items: center; gap: 12px;
  padding: 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.25s var(--ease-out);
  text-align: left;
  color: var(--text-secondary);
  font-family: var(--font-body);
}
.output-tab:hover {
  border-color: var(--border-accent);
  background: var(--bg-elevated);
  transform: translateY(-1px);
}
.output-tab.active {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--accent-glow), var(--bg-secondary));
  box-shadow: 0 0 20px var(--accent-glow), inset 0 1px 0 rgba(201,169,110,0.1);
}
.output-tab.active .tab-icon { color: var(--accent); }
.output-tab.active strong { color: var(--text-primary); }

.tab-icon {
  flex-shrink: 0;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 8px;
  background: var(--bg-elevated);
  color: var(--text-tertiary);
  transition: all 0.2s;
}
.output-tab.active .tab-icon { background: var(--accent-glow-strong); }

.tab-text strong {
  display: block;
  font-size: 13px; font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 2px;
  transition: color 0.2s;
}
.tab-text span {
  font-size: 11px;
  color: var(--text-tertiary);
}

.sub-options {
  margin-top: 12px; padding: 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  animation: fadeInUp 0.3s var(--ease-out);
}

/* === GENERATE BUTTON === */
.generate-section {
  margin: 8px 0 28px;
  animation: fadeInUp 0.5s var(--ease-out) 0.24s both;
}
.generate-btn {
  width: 100%;
  height: 52px;
  background: linear-gradient(135deg, var(--accent), #b8943e);
  border: none;
  border-radius: var(--radius-lg);
  color: var(--bg-deep);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s var(--ease-out);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.generate-btn::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s;
}
.generate-btn:hover::before { transform: translateX(100%); }
.generate-btn:hover {
  box-shadow: 0 4px 24px var(--accent-glow-strong);
  transform: translateY(-1px);
}
.generate-btn:active { transform: translateY(0) scale(0.99); }
.generate-btn.loading {
  background: var(--bg-elevated);
  color: var(--accent);
  cursor: wait;
}
.generate-btn .gen-loading { display: none; }
.generate-btn.loading .gen-text { display: none; }
.generate-btn.loading .gen-key { display: none; }
.generate-btn.loading .gen-loading {
  display: flex; align-items: center; gap: 8px;
}

.gen-key {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 2px 6px;
  background: rgba(0,0,0,0.2);
  border-radius: 4px;
  font-weight: 400;
}

.spinner {
  width: 16px; height: 16px;
  border: 2px solid transparent;
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* === RESULTS === */
.panel-results .panel-label {
  display: flex;
  align-items: center;
}
.results-actions {
  display: flex; gap: 8px;
  margin-left: auto;
}
.action-btn {
  display: flex; align-items: center; gap: 5px;
  padding: 5px 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 11px;
  cursor: pointer;
  font-family: var(--font-body);
  transition: all 0.2s;
}
.action-btn:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
}

.results-grid {
  display: grid;
  gap: 12px;
}
.results-grid.grid-1 { grid-template-columns: 1fr; }
.results-grid.grid-2 { grid-template-columns: 1fr 1fr; }
.results-grid.grid-4 { grid-template-columns: 1fr 1fr; }
.results-grid.grid-6 { grid-template-columns: 1fr 1fr 1fr; }
.results-grid.grid-10 { grid-template-columns: 1fr 1fr 1fr; }

.result-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  animation: fadeInUp 0.4s var(--ease-out) both;
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
}
.result-card:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.result-card img {
  width: 100%;
  display: block;
  aspect-ratio: 16/9;
  object-fit: cover;
}
.result-card.ratio-3-4 img { aspect-ratio: 3/4; }
.result-card.ratio-1-1 img { aspect-ratio: 1/1; }
.result-card.ratio-21-9 img { aspect-ratio: 21/9; }

.result-overlay {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 10px;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  display: flex; align-items: center; justify-content: space-between;
  opacity: 0;
  transition: opacity 0.2s;
}
.result-card:hover .result-overlay { opacity: 1; }

.result-label {
  font-size: 11px; color: var(--text-secondary);
}
.result-btns { display: flex; gap: 4px; }
.result-btn {
  width: 28px; height: 28px;
  border-radius: 6px;
  background: rgba(255,255,255,0.1);
  border: none; color: #fff;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}
.result-btn:hover { background: var(--accent); color: var(--bg-deep); }

/* Loading skeleton */
.result-skeleton {
  aspect-ratio: 16/9;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.result-skeleton::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.03), transparent);
  animation: shimmer 1.5s ease infinite;
}
@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}
.skeleton-text {
  position: absolute;
  bottom: 16px; left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  color: var(--text-tertiary);
  display: flex; align-items: center; gap: 8px;
}
.skeleton-text .spinner {
  width: 14px; height: 14px;
  border-width: 1.5px;
}

/* === LIGHTBOX === */
.lightbox {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  backdrop-filter: blur(8px);
}
.lightbox.open { opacity: 1; pointer-events: auto; }
.lightbox img {
  max-width: 90vw; max-height: 80vh;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  transition: transform 0.4s var(--ease-spring);
}
.lightbox.open img { transform: scale(1); }

.lightbox-close {
  position: absolute; top: 20px; right: 20px;
  background: rgba(255,255,255,0.1);
  border: none; color: #fff;
  width: 40px; height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}
.lightbox-close:hover { background: rgba(255,255,255,0.2); }

.lightbox-actions { display: flex; gap: 8px; }
.lightbox-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  color: #fff; font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-body);
}
.lightbox-btn:hover { background: var(--accent); color: var(--bg-deep); border-color: var(--accent); }

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .sidebar { position: fixed; left: 0; top: 0; bottom: 0; z-index: 200; }
  .sidebar.hidden { transform: translateX(-100%); }
  .settings-grid { grid-template-columns: 1fr 1fr; }
  .output-tabs { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .input-grid { grid-template-columns: 1fr; }
  .settings-grid { grid-template-columns: 1fr 1fr; }
  .output-tabs { grid-template-columns: 1fr; }
  .results-grid.grid-2,
  .results-grid.grid-4,
  .results-grid.grid-6,
  .results-grid.grid-10 { grid-template-columns: 1fr; }
  .workspace { padding: 16px 16px 60px; }
}