/* Collectible Display Case Layout Builder — Styles */
:root {
  --bg: #1a1612;
  --bg-panel: #241f19;
  --bg-card: #2d261e;
  --bg-input: #1e1a15;
  --border: #3d3429;
  --border-light: #4a3f32;
  --text: #f0e8dc;
  --text-muted: #a89880;
  --text-dim: #7a6c5c;
  --accent: #d4a24c;
  --accent-hover: #e0b46a;
  --accent-dim: #8a6929;
  --danger: #c0392b;
  --success: #27ae60;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow: 0 2px 12px rgba(0,0,0,0.3);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

/* Header */
.site-header {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  font-weight: 700;
  font-size: 1.2rem;
  text-decoration: none;
}
.logo:hover { color: var(--accent-hover); text-decoration: none; }
.logo-text { letter-spacing: 0.02em; }

.main-nav {
  display: flex;
  gap: 1.5rem;
}
.main-nav a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}
.main-nav a:hover { color: var(--text); }

/* App Shell */
.app-shell {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem;
  display: grid;
  grid-template-columns: 260px 1fr 280px;
  gap: 1.5rem;
  align-items: start;
}

/* Panels */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.panel h2 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--accent);
}
.panel h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin: 1rem 0 0.5rem;
  color: var(--text-muted);
}

/* Form Fields */
.field-group {
  margin-bottom: 0.75rem;
}
.field-group label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}
.field-group input[type="text"],
.field-group input[type="number"],
.field-group select,
.field-group textarea {
  width: 100%;
  padding: 0.5rem 0.65rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9rem;
  font-family: var(--font);
}
.field-group input:focus,
.field-group select:focus,
.field-group textarea:focus {
  outline: none;
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 2px rgba(212,162,76,0.15);
}
.field-group input[type="checkbox"] {
  margin-right: 0.4rem;
  accent-color: var(--accent);
}

.input-pair {
  display: flex;
  gap: 0.5rem;
}
.input-pair input { flex: 1; }
.input-pair select,
.unit-label {
  flex-shrink: 0;
  min-width: 70px;
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
}

.field-row {
  display: flex;
  gap: 0.5rem;
}
.field-row .field-group { flex: 1; }

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1rem 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn-primary {
  background: var(--accent);
  color: #1a1612;
  width: 100%;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border-color: var(--border-light);
}
.btn-secondary:hover { background: var(--border); }
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border);
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-dim); }

/* Preset Buttons */
.preset-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.preset-btn {
  padding: 0.35rem 0.7rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
  font-size: 0.78rem;
  cursor: pointer;
  font-family: var(--font);
  transition: all 0.15s;
}
.preset-btn:hover {
  border-color: var(--accent-dim);
  color: var(--text);
}
.preset-btn.active {
  background: var(--accent-dim);
  color: var(--text);
  border-color: var(--accent);
}

/* Canvas */
.panel-canvas {
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 500px;
}
.canvas-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.canvas-toolbar h2 { margin-bottom: 0; }
.toolbar-actions {
  display: flex;
  gap: 0.5rem;
}

.canvas-wrap {
  flex: 1;
  padding: 1rem;
  overflow: auto;
}
.layout-canvas {
  position: relative;
  background: var(--bg-input);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  min-height: 400px;
  background-image:
    linear-gradient(rgba(61,52,41,0.3) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61,52,41,0.3) 1px, transparent 1px);
  background-size: 20px 20px;
}
.layout-canvas.no-grid {
  background-image: none;
}

.canvas-empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  text-align: center;
  gap: 0.5rem;
}
.canvas-empty-state p { font-size: 0.95rem; }
.empty-hint { font-size: 0.8rem; color: var(--text-dim); }

.canvas-footer {
  display: flex;
  justify-content: space-between;
  padding: 0.6rem 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Placed Items on Canvas */
.placed-item {
  position: absolute;
  border-radius: 3px;
  cursor: grab;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 600;
  color: rgba(0,0,0,0.6);
  text-align: center;
  padding: 2px;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.2);
  user-select: none;
  transition: box-shadow 0.15s;
}
.placed-item:hover {
  box-shadow: 0 0 0 2px rgba(212,162,76,0.5);
}
.placed-item.selected {
  box-shadow: 0 0 0 2px var(--accent);
}
.placed-item .item-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

/* Item Library */
.item-library {
  max-height: 250px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.library-empty {
  color: var(--text-dim);
  font-size: 0.8rem;
  text-align: center;
  padding: 1rem;
}

.lib-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.6rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: grab;
  transition: border-color 0.15s;
}
.lib-item:hover { border-color: var(--accent-dim); }
.lib-item .lib-color {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  flex-shrink: 0;
}
.lib-item .lib-name {
  flex: 1;
  font-size: 0.82rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.lib-item .lib-size {
  font-size: 0.72rem;
  color: var(--text-dim);
  flex-shrink: 0;
}
.lib-item .lib-add-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0 0.25rem;
  line-height: 1;
}
.lib-item .lib-add-btn:hover { color: var(--accent-hover); }

/* Export Actions */
.export-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.export-actions .btn {
  flex: 1 1 calc(50% - 0.2rem);
  min-width: 100px;
}

/* Content Sections */
.content-section {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}
.content-alt {
  background: var(--bg-panel);
  max-width: 100%;
}
.content-alt .content-inner {
  max-width: 1400px;
  margin: 0 auto;
}
.content-inner h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--accent);
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}
.guide-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.guide-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
}
.guide-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Example Cards */
.example-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.example-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.example-visual {
  margin-bottom: 0.75rem;
}
.mini-shelf {
  position: relative;
  height: 80px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.mini-item {
  position: absolute;
  border-radius: 2px;
  opacity: 0.85;
}
.example-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}
.example-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}
.faq-item:last-child { border-bottom: none; }
.faq-item dt {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.3rem;
  color: var(--text);
}
.faq-item dd {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Footer */
.site-footer {
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}
.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-dim);
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  margin: 0.5rem 0;
}
.footer-links a { color: var(--text-muted); }
.footer-note { margin-top: 0.5rem; font-size: 0.75rem; }

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

/* Toast */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1.25rem;
  font-size: 0.85rem;
  color: var(--text);
  box-shadow: var(--shadow);
  z-index: 1000;
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.5s forwards;
}
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }

@keyframes toastIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toastOut { from { opacity: 1; } to { opacity: 0; } }

/* Print */
@media print {
  .site-header, .panel-setup, .panel-library, .site-footer, .content-section { display: none !important; }
  .app-shell { display: block; padding: 0; }
  .panel-canvas { border: none; }
  .layout-canvas { border: 2px solid #333; }
  body { background: #fff; color: #000; }
}

/* Responsive */
@media (max-width: 1100px) {
  .app-shell {
    grid-template-columns: 240px 1fr;
  }
  .panel-library {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .app-shell {
    grid-template-columns: 1fr;
    padding: 1rem;
  }
  .header-inner { padding: 0.6rem 1rem; }
  .main-nav { gap: 1rem; }
  .guide-grid, .example-grid { grid-template-columns: 1fr; }
  .content-section { padding: 1.5rem 1rem; }
}

@media (max-width: 480px) {
  .logo-text { display: none; }
  .toolbar-actions { flex-direction: column; gap: 0.25rem; }
  .export-actions .btn { flex: 1 1 100%; }
}



/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}