/* ═══════════════════════════════════════════════════════════════
   STOREFRONT BUILDER — Shopify-style drag-and-drop editor
   ═══════════════════════════════════════════════════════════════ */

:root {
  --sb-primary: #6366f1;
  --sb-primary-light: #818cf8;
  --sb-accent: #f59e0b;
  --sb-success: #10b981;
  --sb-danger: #ef4444;
  --sb-bg: #0f172a;
  --sb-surface: #1e293b;
  --sb-surface-light: #334155;
  --sb-border: rgba(255,255,255,0.08);
  --sb-text: #f1f5f9;
  --sb-text-muted: #94a3b8;
  --sb-radius: 12px;
  --sb-sidebar-w: 340px;
  --sb-topbar-h: 56px;
}

/* ── Page Shell ────────────────────────────────────────────────── */
.sb-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--sb-bg);
  color: var(--sb-text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  overflow: hidden;
}

/* ── Top Bar ───────────────────────────────────────────────────── */
.sb-topbar {
  height: var(--sb-topbar-h);
  background: rgba(15,23,42,0.97);
  border-bottom: 1px solid var(--sb-border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 16px;
  flex-shrink: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}
.sb-topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.3px;
}
.sb-topbar-brand svg { flex-shrink: 0; }
.sb-topbar-brand span {
  background: linear-gradient(90deg,#38bdf8,#6366f1,#f472b6,#f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sb-topbar-center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.sb-topbar-center .sb-store-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--sb-text-muted);
}
.sb-viewport-btns {
  display: flex;
  gap: 2px;
  background: var(--sb-surface);
  border-radius: 8px;
  padding: 3px;
}
.sb-viewport-btn {
  background: none;
  border: none;
  color: var(--sb-text-muted);
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s;
}
.sb-viewport-btn:hover { color: var(--sb-text); }
.sb-viewport-btn.active {
  background: var(--sb-primary);
  color: #fff;
}
.sb-topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sb-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  white-space: nowrap;
}
.sb-btn-ghost {
  background: transparent;
  color: var(--sb-text-muted);
  border: 1px solid var(--sb-border);
}
.sb-btn-ghost:hover { background: var(--sb-surface); color: var(--sb-text); }
.sb-btn-primary {
  background: var(--sb-primary);
  color: #fff;
}
.sb-btn-primary:hover { background: var(--sb-primary-light); }
.sb-btn-success {
  background: var(--sb-success);
  color: #fff;
}
.sb-btn-success:hover { filter: brightness(1.1); }
.sb-btn-danger {
  background: var(--sb-danger);
  color: #fff;
}
.sb-btn-danger:hover { filter: brightness(1.1); }
.sb-btn-sm { padding: 5px 10px; font-size: 0.78rem; }
.sb-btn-icon {
  width: 34px;
  height: 34px;
  padding: 0;
  justify-content: center;
  border-radius: 8px;
}

/* ── Main Layout (sidebar + canvas) ────────────────────────────── */
.sb-main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ── Left Sidebar ──────────────────────────────────────────────── */
.sb-sidebar {
  width: var(--sb-sidebar-w);
  background: var(--sb-surface);
  border-right: 1px solid var(--sb-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
}
.sb-sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--sb-border);
  flex-shrink: 0;
}
.sb-sidebar-tab {
  flex: 1;
  background: none;
  border: none;
  color: var(--sb-text-muted);
  padding: 12px 8px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.sb-sidebar-tab:hover { color: var(--sb-text); }
.sb-sidebar-tab.active {
  color: var(--sb-primary-light);
  border-bottom-color: var(--sb-primary);
}
.sb-sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}
.sb-sidebar-content::-webkit-scrollbar { width: 5px; }
.sb-sidebar-content::-webkit-scrollbar-thumb { background: var(--sb-surface-light); border-radius: 3px; }

/* ── Panel Groups ──────────────────────────────────────────────── */
.sb-panel-group { margin-bottom: 20px; }
.sb-panel-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--sb-text-muted);
  margin-bottom: 10px;
}
.sb-field { margin-bottom: 14px; }
.sb-field label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--sb-text-muted);
  margin-bottom: 5px;
}
.sb-input, .sb-select, .sb-textarea {
  width: 100%;
  background: var(--sb-bg);
  border: 1px solid var(--sb-border);
  border-radius: 8px;
  color: var(--sb-text);
  padding: 8px 12px;
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s;
}
.sb-input:focus, .sb-select:focus, .sb-textarea:focus {
  border-color: var(--sb-primary);
}
.sb-textarea { min-height: 80px; resize: vertical; }
.sb-color-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sb-color-swatch {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 2px solid var(--sb-border);
  cursor: pointer;
  padding: 0;
  overflow: hidden;
}
.sb-color-swatch input[type="color"] {
  width: 44px;
  height: 44px;
  border: none;
  cursor: pointer;
  margin: -6px;
}
.sb-toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
}
.sb-toggle-row span { font-size: 0.82rem; color: var(--sb-text); }
.sb-toggle {
  position: relative;
  width: 40px;
  height: 22px;
  background: var(--sb-surface-light);
  border-radius: 11px;
  cursor: pointer;
  transition: background 0.2s;
  border: none;
  padding: 0;
}
.sb-toggle.active { background: var(--sb-primary); }
.sb-toggle::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
}
.sb-toggle.active::after { transform: translateX(18px); }

/* ── Section Cards (draggable list) ─────────────────────────────── */
.sb-section-list { display: flex; flex-direction: column; gap: 8px; }
.sb-section-card {
  background: var(--sb-bg);
  border: 1px solid var(--sb-border);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: grab;
  transition: all 0.2s;
}
.sb-section-card:hover { border-color: var(--sb-primary); }
.sb-section-card.dragging { opacity: 0.5; border-color: var(--sb-accent); }
.sb-section-card .drag-handle {
  color: var(--sb-text-muted);
  cursor: grab;
  font-size: 0.9rem;
}
.sb-section-card .section-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  flex-shrink: 0;
}
.sb-section-card .section-info {
  flex: 1;
  min-width: 0;
}
.sb-section-card .section-info .section-name {
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sb-section-card .section-info .section-type {
  font-size: 0.7rem;
  color: var(--sb-text-muted);
}
.sb-section-card .section-actions {
  display: flex;
  gap: 4px;
}
.sb-section-card .section-actions button {
  background: none;
  border: none;
  color: var(--sb-text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  font-size: 0.78rem;
  transition: all 0.15s;
}
.sb-section-card .section-actions button:hover {
  color: var(--sb-text);
  background: var(--sb-surface-light);
}

/* ── Add Section Grid ──────────────────────────────────────────── */
.sb-add-section-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 12px;
}
.sb-add-section-btn {
  background: var(--sb-bg);
  border: 1px dashed var(--sb-border);
  border-radius: 10px;
  padding: 14px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--sb-text-muted);
  font-size: 0.72rem;
  font-weight: 600;
  text-align: center;
}
.sb-add-section-btn i { font-size: 1.1rem; }
.sb-add-section-btn:hover {
  border-color: var(--sb-primary);
  color: var(--sb-primary-light);
  background: rgba(99,102,241,0.05);
}

/* ── Canvas (preview) ──────────────────────────────────────────── */
.sb-canvas {
  flex: 1;
  background: #0b1120;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 24px;
  overflow-y: auto;
}
.sb-preview-frame {
  width: 100%;
  max-width: 1200px;
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  transition: max-width 0.3s ease;
  min-height: 600px;
}
.sb-preview-frame.tablet { max-width: 768px; }
.sb-preview-frame.mobile { max-width: 375px; }

/* ── Preview Elements Inside Canvas ─────────────────────────────── */
.sfp-announcement {
  padding: 8px 16px;
  text-align: center;
  font-size: 0.82rem;
  font-weight: 600;
}
.sfp-nav {
  display: flex;
  align-items: center;
  padding: 12px 24px;
  border-bottom: 1px solid #e2e8f0;
  gap: 24px;
  background: #fff;
}
.sfp-nav-logo { font-size: 1.2rem; font-weight: 800; }
.sfp-nav-links { display: flex; gap: 16px; flex: 1; }
.sfp-nav-links a {
  color: #475569;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: color 0.2s;
}
.sfp-nav-links a:hover { color: #1e293b; }
.sfp-hero {
  position: relative;
  padding: 80px 40px;
  text-align: center;
  background-size: cover;
  background-position: center;
}
.sfp-hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.45);
}
.sfp-hero-content {
  position: relative;
  z-index: 1;
  color: #fff;
}
.sfp-hero h1 { font-size: 2.4rem; font-weight: 800; margin-bottom: 12px; }
.sfp-hero p { font-size: 1.1rem; opacity: 0.9; margin-bottom: 24px; }
.sfp-hero-cta {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 8px;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition: filter 0.2s;
}
.sfp-hero-cta:hover { filter: brightness(1.1); }
.sfp-section {
  padding: 48px 32px;
  position: relative;
  cursor: pointer;
  transition: outline 0.2s;
}
.sfp-section:hover {
  outline: 2px dashed var(--sb-primary);
  outline-offset: -2px;
}
.sfp-section.selected {
  outline: 2px solid var(--sb-primary);
  outline-offset: -2px;
}
.sfp-section-label {
  position: absolute;
  top: 4px;
  left: 4px;
  background: var(--sb-primary);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.2s;
  z-index: 2;
}
.sfp-section:hover .sfp-section-label { opacity: 1; }
.sfp-products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.sfp-product-card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  overflow: hidden;
  transition: box-shadow 0.2s;
}
.sfp-product-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.08); }
.sfp-product-img {
  height: 180px;
  background: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: #cbd5e1;
}
.sfp-product-info { padding: 12px; }
.sfp-product-info h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 4px;
}
.sfp-product-info .price {
  font-size: 0.95rem;
  font-weight: 700;
  color: #6366f1;
}
.sfp-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 32px;
  text-align: center;
  font-size: 0.82rem;
}
.sfp-footer .social-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 12px;
}
.sfp-footer .social-row a {
  color: #64748b;
  font-size: 1.1rem;
  transition: color 0.2s;
}
.sfp-footer .social-row a:hover { color: #f1f5f9; }

/* ── Theme Gallery ─────────────────────────────────────────────── */
.sb-theme-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.sb-theme-card {
  background: var(--sb-bg);
  border: 2px solid var(--sb-border);
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s;
}
.sb-theme-card:hover { border-color: var(--sb-primary); }
.sb-theme-card.selected { border-color: var(--sb-primary); box-shadow: 0 0 0 2px rgba(99,102,241,0.3); }
.sb-theme-thumb {
  height: 90px;
  background: var(--sb-surface-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}
.sb-theme-info { padding: 8px 10px; }
.sb-theme-info h5 {
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 2px;
}
.sb-theme-info span {
  font-size: 0.68rem;
  color: var(--sb-text-muted);
}
.sb-theme-badge {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-left: 4px;
}
.sb-theme-badge.premium { background: rgba(245,158,11,0.15); color: #f59e0b; }
.sb-theme-badge.free { background: rgba(16,185,129,0.15); color: #10b981; }

/* ── Empty States ──────────────────────────────────────────────── */
.sb-empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--sb-text-muted);
}
.sb-empty-state i { font-size: 2.5rem; margin-bottom: 12px; opacity: 0.4; }
.sb-empty-state p { font-size: 0.85rem; }

/* ── Toast Notifications ───────────────────────────────────────── */
.sb-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 0.82rem;
  font-weight: 600;
  color: #fff;
  z-index: 10000;
  animation: sbToastIn 0.3s ease;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.sb-toast.success { background: var(--sb-success); }
.sb-toast.error { background: var(--sb-danger); }
.sb-toast.info { background: var(--sb-primary); }
@keyframes sbToastIn {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .sb-sidebar {
    position: fixed;
    left: -300px;
    top: 0;
    width: 280px;
    height: 100vh;
    z-index: 9999;
    transition: left 0.3s ease;
    box-shadow: 4px 0 24px rgba(0,0,0,0.3);
    overflow-y: auto;
  }
  .sb-sidebar.mobile-open { left: 0; }
  .sb-add-section-grid { grid-template-columns: 1fr; }
  .sb-canvas { width: 100% !important; margin-left: 0 !important; }
}
@media (max-width: 600px) {
  .sb-topbar-center { display: none; }
  .sb-topbar { flex-wrap: wrap; gap: 8px; padding: 8px 12px; }
}