*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --admin-primary: #0D47A1; --admin-secondary: #1565C0; --admin-accent: #64B5F6;
  --admin-success: #0D47A1; --admin-bg: #F0F4F8; --admin-card: #fff;
  --admin-text: #0A1628; --admin-text-light: #546E7A; --admin-border: #E0E0E0;
  --admin-radius: 12px; --admin-shadow: 0 2px 12px rgba(13,71,161,0.06);
}
body { font-family: 'Segoe UI', system-ui, sans-serif; background: var(--admin-bg); color: var(--admin-text); display: flex; min-height: 100vh; }
.sidebar { width: 260px; min-width: 260px; background: var(--admin-primary); color: #fff; padding: 1.5rem 0; height: 100vh; position: sticky; top: 0; overflow-y: auto; display: flex; flex-direction: column; }
.sidebar-brand { padding: 0 1.5rem 1.5rem; border-bottom: 1px solid rgba(255,255,255,0.08); }
.sidebar-brand h2 { font-size: 1.1rem; font-weight: 800; }
.sidebar-brand h2 i { color: var(--admin-accent); margin-right: 0.4rem; }
.sidebar-brand p { font-size: 0.75rem; opacity: 0.5; margin-top: 0.2rem; }
.sidebar-nav { flex: 1; }
.nav-item { display: flex; align-items: center; gap: 0.8rem; padding: 0.85rem 1.5rem; color: rgba(255,255,255,0.6); text-decoration: none; font-size: 0.9rem; cursor: pointer; transition: all 0.2s ease; border-left: 3px solid transparent; }
.nav-item:hover { color: #fff; background: rgba(255,255,255,0.05); }
.nav-item.active { color: #fff; background: rgba(255,255,255,0.08); border-left-color: var(--admin-accent); }
.nav-item i { width: 20px; text-align: center; }
.sidebar-footer { padding: 1rem 1.5rem; border-top: 1px solid rgba(255,255,255,0.08); }
.sidebar-footer a { display: flex; align-items: center; gap: 0.6rem; color: rgba(255,255,255,0.5); text-decoration: none; font-size: 0.85rem; padding: 0.5rem 0; }
.sidebar-footer a:hover { color: #fff; }
.main { flex: 1; overflow-x: hidden; }
.main-header { background: #fff; padding: 1.2rem 2rem; border-bottom: 1px solid var(--admin-border); display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 100; }
.main-header h1 { font-size: 1.3rem; font-weight: 700; }
.main-header h1 span { color: var(--admin-text-light); font-weight: 400; font-size: 0.9rem; margin-left: 0.5rem; }
.header-actions { display: flex; gap: 0.8rem; }
.btn { padding: 0.6rem 1.2rem; border-radius: 8px; border: none; font-size: 0.85rem; font-weight: 600; cursor: pointer; transition: all 0.3s ease; display: inline-flex; align-items: center; gap: 0.4rem; text-decoration: none; }
.btn-preview { background: #E3F2FD; color: var(--admin-primary); }
.btn-preview:hover { background: #BBDEFB; }
.btn-save { background: var(--admin-success); color: #fff; }
.btn-save:hover { background: #001F4A; }
.btn-reset { background: #FBE9E7; color: #C62828; }
.btn-reset:hover { background: #FFCCBC; }
.btn-add { background: #E3F2FD; color: var(--admin-primary); font-size: 0.8rem; padding: 0.4rem 0.8rem; }
.btn-add:hover { background: #BBDEFB; }
.btn-remove { background: #FBE9E7; color: #C62828; font-size: 0.75rem; padding: 0.3rem 0.6rem; border: none; border-radius: 6px; cursor: pointer; }
.btn-remove:hover { background: #FFCCBC; }
.btn-upload { background: #E8F5E9; color: #2E7D32; font-size: 0.8rem; padding: 0.4rem 0.8rem; border: 1px dashed #81C784; border-radius: 6px; cursor: pointer; display: inline-flex; align-items: center; gap: 0.3rem; }
.btn-upload:hover { background: #C8E6C9; }
.content { padding: 2rem; }
.tab-content { display: none; }
.tab-content.active { display: block; }
.form-section { background: var(--admin-card); border-radius: var(--admin-radius); box-shadow: var(--admin-shadow); padding: 1.5rem 2rem; margin-bottom: 1.5rem; }
.form-section-title { font-size: 1rem; font-weight: 700; margin-bottom: 1.2rem; padding-bottom: 0.8rem; border-bottom: 1px solid var(--admin-border); display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.form-section-title i { color: var(--admin-accent); }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.2rem; }
.form-group { display: flex; flex-direction: column; gap: 0.3rem; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: 0.82rem; font-weight: 600; color: var(--admin-text-light); }
.form-group input, .form-group textarea { padding: 0.65rem 0.9rem; border: 2px solid var(--admin-border); border-radius: 8px; font-size: 0.9rem; font-family: inherit; transition: all 0.2s; background: #FAFAFA; color: var(--admin-text); }
.form-group input:focus, .form-group textarea:focus { border-color: var(--admin-accent); outline: none; background: #fff; box-shadow: 0 0 0 3px rgba(100,181,246,0.15); }
.form-group input[type="color"] { height: 42px; padding: 2px; cursor: pointer; }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-hint { font-size: 0.75rem; color: #999; margin-top: 0.1rem; }
.toggle-label { display: flex; align-items: center; gap: 0.6rem; cursor: pointer; font-size: 0.9rem; font-weight: 500; }
.toggle-label input[type="checkbox"] { display: none; }
.toggle-switch { width: 40px; height: 22px; background: #ccc; border-radius: 11px; position: relative; transition: background 0.3s; flex-shrink: 0; }
.toggle-switch::after { content: ''; position: absolute; top: 2px; left: 2px; width: 18px; height: 18px; background: #fff; border-radius: 50%; transition: transform 0.3s; }
.toggle-label input:checked + .toggle-switch { background: var(--admin-success); }
.toggle-label input:checked + .toggle-switch::after { transform: translateX(18px); }
.color-row { display: flex; align-items: center; gap: 0.6rem; }
.color-row input[type="color"] { width: 48px; height: 38px; flex-shrink: 0; }
.color-row input[type="text"] { flex: 1; }
.img-upload-row { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.img-upload-row input[type="text"] { flex: 1; min-width: 150px; }
.upload-preview { width: 80px; height: 60px; border-radius: 6px; object-fit: cover; border: 2px solid var(--admin-border); }
.upload-preview.large { width: 160px; height: 100px; }
.repeater-item { background: #FAFAFA; border: 1px solid var(--admin-border); border-radius: 8px; padding: 1rem 1.2rem; margin-bottom: 0.8rem; }
.repeater-item .repeater-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.8rem; }
.repeater-item .repeater-header h5 { font-size: 0.85rem; color: var(--admin-text-light); font-weight: 600; }
.repeater-item .repeater-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; }
.repeater-item .repeater-fields.full { grid-template-columns: 1fr; }
.repeater-item .repeater-fields .form-group { gap: 0.2rem; }
.repeater-item .repeater-fields .form-group label { font-size: 0.75rem; }
.repeater-item .repeater-fields .form-group input { padding: 0.5rem 0.7rem; font-size: 0.85rem; }
.repeater-item .repeater-fields .form-group textarea { padding: 0.5rem 0.7rem; font-size: 0.85rem; min-height: 60px; }
.overlay-preview-wrap { display: flex; align-items: center; gap: 0.6rem; margin-top: 0.3rem; font-size: 0.78rem; color: var(--admin-text-light); }
.overlay-preview { width: 60px; height: 32px; border-radius: 6px; border: 2px solid var(--admin-border); background: #fff; }
.toast { position: fixed; bottom: 2rem; right: 2rem; background: var(--admin-success); color: #fff; padding: 1rem 1.5rem; border-radius: var(--admin-radius); box-shadow: 0 8px 32px rgba(0,0,0,0.15); font-size: 0.9rem; font-weight: 600; display: flex; align-items: center; gap: 0.6rem; z-index: 9999; transform: translateY(120px); opacity: 0; transition: all 0.4s ease; }
.toast.show { transform: translateY(0); opacity: 1; }
@media (max-width: 768px) {
  body { flex-direction: column; }
  .sidebar { width: 100%; min-width: unset; height: auto; position: relative; padding: 0.8rem 0; }
  .sidebar-brand { padding: 0.8rem 1.2rem 1rem; }
  .sidebar-nav { display: flex; flex-wrap: wrap; padding: 0.5rem; }
  .nav-item { padding: 0.6rem 0.8rem; font-size: 0.8rem; border-left: none; border-bottom: 2px solid transparent; }
  .nav-item.active { border-left: none; border-bottom-color: var(--admin-accent); }
  .sidebar-footer { display: none; }
  .main-header { padding: 1rem; flex-direction: column; gap: 0.8rem; align-items: stretch; }
  .header-actions { justify-content: flex-end; }
  .content { padding: 1rem; }
  .form-section { padding: 1rem; }
  .form-grid, .repeater-item .repeater-fields { grid-template-columns: 1fr; }
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 4px; }
.speed-control { display:flex;align-items:center;gap:0.5rem; }
.speed-control button { width:32px;height:32px;border:1px solid var(--admin-border);border-radius:6px;background:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:0.85rem;color:var(--admin-primary);transition:all 0.2s; }
.speed-control button:hover { background:var(--admin-primary);color:#fff; }
.speed-control input { width:60px;text-align:center; }