/* =============================================
   ADMIN PANEL — STYLES
   ============================================= */
:root {
    --admin-sidebar-bg: #1e1e2e;
    --admin-sidebar-width: 240px;
    --admin-accent: #7c3aed;
    --admin-accent-hover: #6d28d9;
    --admin-red: #D32F2F;
    --admin-green: #16a34a;
    --admin-blue: #2563eb;
    --admin-bg: #f0f2f5;
    --admin-surface: #ffffff;
    --admin-border: #e2e8f0;
    --admin-text: #1a1a2e;
    --admin-muted: #718096;
    --admin-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--admin-bg);
    color: var(--admin-text);
}

/* =============================================
   LOADING SCREEN
   ============================================= */
.loading-screen {
    position: fixed;
    inset: 0;
    background: var(--admin-sidebar-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    text-align: center;
    color: #aaa;
}

.loading-spinner i {
    font-size: 3rem;
    color: var(--admin-accent);
    margin-bottom: 1rem;
    display: block;
    animation: pulse 1.5s ease infinite;
}

.loading-spinner p {
    font-size: 1rem;
    letter-spacing: 0.5px;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.6; transform: scale(0.95); }
}

/* =============================================
   ACCESO DENEGADO
   ============================================= */
.access-denied {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    background: var(--admin-sidebar-bg);
    color: #fff;
    text-align: center;
}

.access-denied i {
    font-size: 4rem;
    color: var(--admin-red);
}

.access-denied h2 { font-size: 2rem; }
.access-denied p  { color: #aaa; }

.back-link {
    margin-top: 1rem;
    background: var(--admin-accent);
    color: white;
    padding: 0.7rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: opacity 0.2s;
}

.back-link:hover { opacity: 0.85; }

/* =============================================
   LAYOUT PRINCIPAL
   ============================================= */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

/* =============================================
   SIDEBAR
   ============================================= */
.admin-sidebar {
    width: var(--admin-sidebar-width);
    background-color: var(--admin-sidebar-bg);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
    border-right: 1px solid rgba(255,255,255,0.05);
}

.admin-logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1.5rem 1.2rem;
    border-bottom: 1px solid rgba(255,255,255,0.07);
}

.admin-logo img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--admin-accent);
}

.admin-logo-title {
    display: block;
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    font-weight: 800;
    color: white;
    line-height: 1;
}

.admin-logo-sub {
    display: block;
    font-size: 0.72rem;
    color: var(--admin-accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 2px;
}

.admin-nav {
    flex-grow: 1;
    padding: 1rem 0;
}

.admin-nav ul { list-style: none; }

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 1.2rem;
    color: #718096;
    cursor: pointer;
    transition: all 0.2s;
    border-left: 3px solid transparent;
    font-size: 0.9rem;
    font-weight: 500;
}

.nav-item i { width: 18px; text-align: center; }

.nav-item:hover {
    background: rgba(124, 58, 237, 0.1);
    color: white;
    border-left-color: var(--admin-accent);
}

.nav-item.active {
    background: rgba(124, 58, 237, 0.15);
    color: white;
    border-left-color: var(--admin-accent);
    font-weight: 600;
}

.admin-sidebar-footer {
    padding: 1rem 1.2rem;
    border-top: 1px solid rgba(255,255,255,0.07);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.admin-user {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #a0aec0;
    font-size: 0.82rem;
    word-break: break-all;
}

.admin-user i { color: var(--admin-accent); font-size: 1.1rem; }

.logout-btn {
    width: 100%;
    background: rgba(211, 47, 47, 0.15);
    border: 1px solid rgba(211, 47, 47, 0.3);
    color: #f87171;
    padding: 0.6rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.logout-btn:hover { background: rgba(211, 47, 47, 0.3); }

.back-store-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: #718096;
    font-size: 0.82rem;
    text-decoration: none;
    transition: color 0.2s;
    padding: 0.4rem;
}

.back-store-link:hover { color: white; }

/* =============================================
   MAIN CONTENT
   ============================================= */
.admin-main {
    margin-left: var(--admin-sidebar-width);
    flex-grow: 1;
    padding: 2rem;
    min-height: 100vh;
}

.admin-top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.admin-top-bar h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--admin-text);
}

.admin-top-bar p {
    color: var(--admin-muted);
    font-size: 0.9rem;
    margin-top: 0.2rem;
}

/* =============================================
   STATS CARDS
   ============================================= */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.2rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--admin-surface);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.2rem;
    box-shadow: var(--admin-shadow);
    border: 1px solid var(--admin-border);
}

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.stat-icon.blue   { background: rgba(37, 99, 235, 0.12); color: var(--admin-blue); }
.stat-icon.green  { background: rgba(22, 163, 74, 0.12);  color: var(--admin-green); }
.stat-icon.red    { background: rgba(211, 47, 47, 0.12);  color: var(--admin-red); }
.stat-icon.purple { background: rgba(124, 58, 237, 0.12); color: var(--admin-accent); }

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    font-family: 'Outfit', sans-serif;
    color: var(--admin-text);
    line-height: 1;
}

.stat-label {
    display: block;
    font-size: 0.82rem;
    color: var(--admin-muted);
    margin-top: 0.3rem;
}

/* =============================================
   ADMIN CARD (contenedor de tabla)
   ============================================= */
.admin-card {
    background: var(--admin-surface);
    border-radius: 12px;
    border: 1px solid var(--admin-border);
    box-shadow: var(--admin-shadow);
    overflow: hidden;
}

.admin-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 1.5rem;
    border-bottom: 1px solid var(--admin-border);
}

.admin-card-header h3 {
    font-size: 1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--admin-text);
}

.admin-card-header h3 i { color: var(--admin-accent); }

.link-btn {
    background: none;
    border: none;
    color: var(--admin-accent);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-family: 'Inter', sans-serif;
}

.table-search {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--admin-bg);
    border: 1px solid var(--admin-border);
    border-radius: 8px;
    padding: 0.4rem 0.8rem;
}

.table-search i { color: var(--admin-muted); font-size: 0.85rem; }

.table-search input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 0.9rem;
    font-family: 'Inter', sans-serif;
    color: var(--admin-text);
    width: 200px;
}

/* =============================================
   TABLA DE PRODUCTOS
   ============================================= */
.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table thead {
    background: #f8fafc;
}

.admin-table th {
    padding: 0.8rem 1rem;
    text-align: left;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--admin-muted);
    border-bottom: 1px solid var(--admin-border);
}

.admin-table td {
    padding: 0.9rem 1rem;
    border-bottom: 1px solid #f1f5f9;
    font-size: 0.9rem;
    color: var(--admin-text);
    vertical-align: middle;
}

.admin-table tbody tr:hover { background: #f8fafc; }
.admin-table tbody tr:last-child td { border-bottom: none; }

.table-loading {
    text-align: center;
    color: var(--admin-muted);
    padding: 3rem !important;
    font-size: 0.95rem;
}

.table-product-img {
    width: 52px;
    height: 52px;
    object-fit: contain;
    border-radius: 8px;
    border: 1px solid var(--admin-border);
    background: #f8fafc;
    padding: 4px;
}

.table-product-name {
    font-weight: 600;
    color: var(--admin-text);
    margin-bottom: 0.2rem;
}

.table-product-desc {
    font-size: 0.8rem;
    color: var(--admin-muted);
    max-width: 260px;
}

.table-price {
    font-weight: 700;
    color: var(--admin-red);
    white-space: nowrap;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.7rem;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
}

.badge-success { background: rgba(22,163,74,0.1); color: var(--admin-green); }
.badge-danger  { background: rgba(211,47,47,0.1);  color: var(--admin-red); }

.category-tag {
    background: rgba(124,58,237,0.1);
    color: var(--admin-accent);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
}

.datasheet-icon {
    color: var(--admin-red);
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Botones de acciones en tabla */
.table-actions {
    display: flex;
    gap: 0.5rem;
}

.table-btn {
    padding: 0.35rem 0.7rem;
    border-radius: 6px;
    border: none;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-family: 'Inter', sans-serif;
    transition: all 0.2s;
}

.edit-btn {
    background: rgba(37,99,235,0.1);
    color: var(--admin-blue);
    border: 1px solid rgba(37,99,235,0.2);
}

.edit-btn:hover { background: rgba(37,99,235,0.2); }

.delete-btn {
    background: rgba(211,47,47,0.1);
    color: var(--admin-red);
    border: 1px solid rgba(211,47,47,0.2);
}

.delete-btn:hover { background: rgba(211,47,47,0.25); }

/* Botón "Nuevo Producto" en el top bar */
.add-product-btn {
    background: linear-gradient(135deg, var(--admin-accent), var(--admin-accent-hover));
    color: white;
    border: none;
    padding: 0.7rem 1.3rem;
    border-radius: 9px;
    font-size: 0.95rem;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: opacity 0.2s, transform 0.2s;
    box-shadow: 0 4px 14px rgba(124,58,237,0.35);
}

.add-product-btn:hover { opacity: 0.9; transform: translateY(-1px); }

/* =============================================
   MODAL PARA EL FORMULARIO DE PRODUCTO
   ============================================= */
.admin-modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.admin-modal-overlay.active { display: flex; }

.admin-modal {
    background: var(--admin-surface);
    border-radius: 16px;
    width: 95%;
    max-width: 680px;
    max-height: 92vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
    from { transform: translateY(16px); opacity: 0; }
    to   { transform: translateY(0); opacity: 1; }
}

.admin-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--admin-border);
    position: sticky;
    top: 0;
    background: white;
    z-index: 10;
}

.admin-modal-header h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--admin-text);
}

.admin-modal-close {
    background: #f1f5f9;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.admin-modal-close:hover { background: var(--admin-red); color: white; }

/* Form grid */
#productForm { padding: 1.5rem; }

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.2rem;
    margin-bottom: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group.full { grid-column: 1 / -1; }

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--admin-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.7rem 0.9rem;
    border: 1.5px solid var(--admin-border);
    border-radius: 8px;
    font-size: 0.9rem;
    font-family: 'Inter', sans-serif;
    color: var(--admin-text);
    outline: none;
    transition: border-color 0.2s;
    background: #fff;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--admin-accent);
    box-shadow: 0 0 0 3px rgba(124,58,237,0.1);
}

.form-group textarea { resize: vertical; }

.img-preview-container {
    margin-top: 0.6rem;
    display: flex;
    justify-content: center;
}

#imgPreview {
    max-height: 120px;
    max-width: 100%;
    border-radius: 8px;
    border: 1px solid var(--admin-border);
    object-fit: contain;
    padding: 4px;
    background: #f8fafc;
}

.form-error {
    color: var(--admin-red);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
    min-height: 20px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.8rem;
    padding-top: 1rem;
    border-top: 1px solid var(--admin-border);
    margin-top: 1rem;
}

.cancel-btn {
    background: #f1f5f9;
    border: 1px solid var(--admin-border);
    color: var(--admin-muted);
    padding: 0.7rem 1.2rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: background 0.2s;
}

.cancel-btn:hover { background: #e2e8f0; }

.save-btn {
    background: linear-gradient(135deg, var(--admin-accent), var(--admin-accent-hover));
    color: white;
    border: none;
    padding: 0.7rem 1.5rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: opacity 0.2s;
    box-shadow: 0 4px 12px rgba(124,58,237,0.3);
}

.save-btn:hover:not(:disabled) { opacity: 0.9; }
.save-btn:disabled { opacity: 0.6; cursor: not-allowed; }