/* assets/css/style.css */

/* Design System - Variables */
:root {
    /* Color Palette */
    --bg-color: #f8f9fa;
    --surface-color: #ffffff;
    --text-primary: #343a40;
    --text-secondary: #6c757d;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --danger-color: #dc3545;
    --success-color: #198754;
    --border-color: #dee2e6;
    
    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Spacing */
    --spacing-1: 8px;
    --spacing-2: 16px;
    --spacing-3: 24px;
    --spacing-4: 32px;
    --spacing-5: 48px;
    --spacing-6: 64px;
    
    /* Borders & Shadows */
    --border-radius: 6px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition-speed: 0.2s;
}

/* Reset & Base Styles */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font-family); background-color: var(--bg-color); color: var(--text-primary); line-height: 1.6; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
h1, h2, h3, h4, h5, h6 { color: var(--text-primary); font-weight: 600; margin-bottom: var(--spacing-2); }
a { color: var(--accent-color); text-decoration: none; transition: color var(--transition-speed) ease; }
a:hover { color: var(--accent-hover); }

/* Buttons */
.btn { display: inline-block; font-family: var(--font-family); font-weight: 500; text-align: center; cursor: pointer; border: 1px solid transparent; padding: 8px 16px; font-size: 1rem; border-radius: var(--border-radius); transition: all var(--transition-speed) ease; text-decoration: none; }
.btn-primary { background-color: var(--accent-color); color: #ffffff; border-color: var(--accent-color); }
.btn-primary:hover:not([disabled]) { background-color: var(--accent-hover); border-color: var(--accent-hover); transform: translateY(-1px); box-shadow: var(--shadow-sm); color: #ffffff; }
.btn-secondary { background-color: var(--surface-color); color: var(--text-primary); border-color: var(--border-color); }
.btn-secondary:hover:not([disabled]) { background-color: #f1f3f5; transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn-danger { background-color: var(--danger-color); color: #ffffff; }
.btn-danger:hover:not([disabled]) { background-color: #c82333; transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; pointer-events: none; }

/* Cards */
.card { background-color: var(--surface-color); border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: var(--spacing-3); box-shadow: var(--shadow-sm); transition: box-shadow var(--transition-speed) ease, transform var(--transition-speed) ease; }
.card:hover { box-shadow: var(--shadow-md); }

/* Forms */
.form-group { margin-bottom: var(--spacing-2); }
.form-label { display: block; margin-bottom: var(--spacing-1); font-weight: 500; color: var(--text-primary); }
.form-control { display: block; width: 100%; padding: 10px 12px; font-family: var(--font-family); font-size: 1rem; line-height: 1.5; color: var(--text-primary); background-color: var(--surface-color); background-clip: padding-box; border: 1px solid var(--border-color); border-radius: var(--border-radius); transition: border-color var(--transition-speed) ease; }
.form-control:focus { outline: 0; border-color: var(--accent-color); }
.form-control[disabled] { background-color: #e9ecef; cursor: not-allowed; }

/* Layout Utilities */
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-3); }
.mt-1 { margin-top: var(--spacing-1); } .mt-2 { margin-top: var(--spacing-2); } .mt-3 { margin-top: var(--spacing-3); } .mt-4 { margin-top: var(--spacing-4); } .mt-5 { margin-top: var(--spacing-5); }
.mb-1 { margin-bottom: var(--spacing-1); } .mb-2 { margin-bottom: var(--spacing-2); } .mb-3 { margin-bottom: var(--spacing-3); } .mb-4 { margin-bottom: var(--spacing-4); } .mb-5 { margin-bottom: var(--spacing-5); }
.text-center { text-align: center; } .text-secondary { color: var(--text-secondary); } .text-right { text-align: right; }
.d-flex { display: flex; } .align-items-center { align-items: center; } .justify-content-between { justify-content: space-between; } .gap-2 { gap: 8px; } 
.pb-2 { padding-bottom: var(--spacing-2); } .pb-3 { padding-bottom: var(--spacing-3); } .p-0 { padding: 0 !important; }
.py-2 { padding-top: var(--spacing-2); padding-bottom: var(--spacing-2); } .py-5 { padding-top: var(--spacing-5); padding-bottom: var(--spacing-5); } .pt-3 { padding-top: var(--spacing-3); }

/* Navbar */
.navbar { background-color: var(--surface-color); border-bottom: 1px solid var(--border-color); padding: var(--spacing-2) 0; position: sticky; top: 0; z-index: 1000; }
.navbar-container { display: flex; justify-content: space-between; align-items: center; }
.navbar-brand { font-size: 1.25rem; font-weight: 700; color: var(--text-primary); }
.navbar-menu { display: flex; align-items: center; flex-grow: 1; justify-content: space-between; margin-left: var(--spacing-4); }
.navbar-nav { list-style: none; display: flex; align-items: center; gap: var(--spacing-3); }
.nav-link { color: var(--text-secondary); font-weight: 500; }
.nav-link:hover, .nav-link.active { color: var(--accent-color); }
.badge { display: inline-block; background-color: var(--accent-color); color: white; padding: 2px 6px; border-radius: 12px; font-size: 0.75rem; font-weight: 700; vertical-align: middle; }
.badge-secondary { background-color: #6c757d; color: white; }
.badge-info { background-color: #0dcaf0; color: #000; }
.badge-primary { background-color: var(--accent-color); color: white; }
.badge-success { background-color: var(--success-color); color: white; }
.badge-danger { background-color: var(--danger-color); color: white; }
.btn-sm { padding: 4px 12px; font-size: 0.875rem; }
.dropdown { position: relative; }
.dropdown-menu { display: none; position: absolute; right: 0; top: 100%; background-color: var(--surface-color); border: 1px solid var(--border-color); border-radius: var(--border-radius); box-shadow: var(--shadow-md); min-width: 150px; list-style: none; margin-top: var(--spacing-1); }
.dropdown-menu.show { display: block; }
.dropdown-item { display: block; padding: var(--spacing-1) var(--spacing-2); color: var(--text-primary); transition: background-color var(--transition-speed) ease; }
.dropdown-item:hover { background-color: var(--bg-color); color: var(--accent-color); }
.text-danger { color: var(--danger-color) !important; }
.text-danger:hover { color: #c82333 !important; }
.navbar-toggler { display: none; background: none; border: none; cursor: pointer; color: var(--text-primary); }

/* Admin Customizations */
.admin-navbar { background-color: #212529; border-bottom: none; box-shadow: var(--shadow-md); }
.admin-navbar .navbar-brand { color: #ffffff; }
.admin-navbar .nav-link { color: #adb5bd; }
.admin-navbar .nav-link:hover, .admin-navbar .nav-link.active { color: #ffffff; }
.admin-navbar .navbar-toggler { color: #ffffff; }
.admin-navbar .dropdown-menu { background-color: #212529; border-color: #343a40; }
.admin-navbar .dropdown-item { color: #adb5bd; }
.admin-navbar .dropdown-item:hover { background-color: #343a40; color: #ffffff; }

/* Footer */
.footer { background-color: var(--surface-color); border-top: 1px solid var(--border-color); padding: var(--spacing-4) 0; margin-top: var(--spacing-6); text-align: center; }
.footer-links { list-style: none; display: flex; justify-content: center; gap: var(--spacing-3); margin: var(--spacing-2) 0; }

/* Hero Section */
.hero { 
    display: flex; 
    align-items: center; 
    justify-content: space-between;
    gap: var(--spacing-4);
    padding: var(--spacing-4); 
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%); 
    border: 1px solid var(--border-color); 
    border-radius: 12px; 
    margin-bottom: var(--spacing-4); 
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-md);
}
.hero-content {
    flex: 1;
    max-width: 500px;
    text-align: left;
    z-index: 2;
}
.hero-content h1 { 
    font-size: 2.5rem; 
    line-height: 1.2;
    margin-bottom: var(--spacing-2); 
    background: linear-gradient(90deg, #1f2937, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-content p { 
    font-size: 1.05rem; 
    color: var(--text-secondary); 
    margin-bottom: var(--spacing-3); 
}
.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
}
.hero-image img {
    max-width: 100%;
    max-height: 320px;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}
.hero-image img:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 25px 50px rgba(0,0,0,0.15);
}
@media (max-width: 768px) {
    .hero { flex-direction: column; text-align: center; }
    .hero-content { text-align: center; max-width: 100%; }
    .hero-image { margin-top: var(--spacing-3); }
}

/* Grid System */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: var(--spacing-3); }

/* Product Card */
.product-card { display: flex; flex-direction: column; }
.product-img { width: 100%; height: 200px; object-fit: cover; background-color: var(--bg-color); border-radius: var(--border-radius); margin-bottom: var(--spacing-2); }
.product-title { font-size: 1.125rem; margin-bottom: var(--spacing-1); }
.product-price { font-weight: 700; color: var(--accent-color); font-size: 1.25rem; margin-bottom: var(--spacing-2); }
.product-card .btn { margin-top: auto; }

/* Auth Container */
.auth-container { max-width: 400px; margin: var(--spacing-5) auto; }
.error-msg { color: var(--danger-color); font-size: 0.875rem; margin-top: 4px; display: none; }
.error-msg.visible { display: block; }
.alert { padding: var(--spacing-2); border-radius: var(--border-radius); margin-bottom: var(--spacing-3); font-weight: 500; }
.alert-danger { background-color: #f8d7da; color: #842029; border: 1px solid #f5c2c7; }
.alert-success { background-color: #d1e7dd; color: #0f5132; border: 1px solid #badbcc; }

/* Shop Layout */
.shop-container { display: flex; gap: var(--spacing-4); align-items: flex-start; }
.shop-sidebar { flex: 0 0 250px; position: sticky; top: 80px; }
.shop-main { flex: 1; min-width: 0; }
.filter-form .form-group { margin-bottom: var(--spacing-2); }
.category-list { list-style: none; padding: 0; }
.category-list li { margin-bottom: var(--spacing-1); }
.category-list a { color: var(--text-secondary); display: block; padding: 6px 10px; border-radius: var(--border-radius); transition: background-color var(--transition-speed) ease; }
.category-list a:hover, .category-list a.active { background-color: #f1f3f5; color: var(--accent-color); font-weight: 500; }

/* Pagination */
.pagination { display: flex; justify-content: center; gap: var(--spacing-1); margin-top: var(--spacing-4); list-style: none; }
.pagination-item { display: inline-block; }
.pagination-link { display: block; padding: 8px 12px; border: 1px solid var(--border-color); border-radius: var(--border-radius); color: var(--text-primary); background-color: var(--surface-color); transition: all var(--transition-speed) ease; }
.pagination-link:hover { background-color: #f1f3f5; color: var(--accent-color); }
.pagination-link.active { background-color: var(--accent-color); color: #ffffff; border-color: var(--accent-color); }

/* Product Details */
.product-details { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-5); background-color: var(--surface-color); padding: var(--spacing-4); border-radius: var(--border-radius); border: 1px solid var(--border-color); }
.product-details-img { width: 100%; height: auto; object-fit: cover; border-radius: var(--border-radius); background-color: var(--bg-color); }
.stock-status { display: inline-block; padding: 4px 10px; border-radius: 12px; font-size: 0.875rem; font-weight: 600; margin-bottom: var(--spacing-2); }
.stock-in { background-color: #d1e7dd; color: #0f5132; }
.stock-out { background-color: #f8d7da; color: #842029; }
.quantity-selector { display: flex; align-items: center; gap: var(--spacing-2); margin-bottom: var(--spacing-3); }
.quantity-input { width: 80px; }

/* Cart Layout */
.cart-layout { display: flex; gap: var(--spacing-4); align-items: flex-start; }
.cart-items { flex: 1; min-width: 0; }
.cart-sidebar { flex: 0 0 320px; position: sticky; top: 80px; }
.cart-table { width: 100%; border-collapse: collapse; }
.cart-table th, .cart-table td { padding: var(--spacing-3) var(--spacing-2); text-align: left; border-bottom: 1px solid var(--border-color); vertical-align: middle; }
.cart-table th { background-color: var(--bg-color); color: var(--text-secondary); font-weight: 600; font-size: 0.875rem; text-transform: uppercase; }
.cart-table tr:last-child td { border-bottom: none; }
.cart-item-img { width: 60px; height: 60px; object-fit: cover; border-radius: var(--border-radius); background-color: var(--bg-color); }
.quantity-input-sm { width: 70px; padding: 6px; }

/* Mobile Responsive */
@media (max-width: 768px) {
    .navbar-menu { display: none; flex-direction: column; width: 100%; position: absolute; top: 100%; left: 0; background-color: var(--surface-color); padding: var(--spacing-3); border-bottom: 1px solid var(--border-color); box-shadow: var(--shadow-sm); margin-left: 0; }
    .navbar-menu.show { display: flex; }
    .navbar-nav { flex-direction: column; width: 100%; align-items: flex-start; margin-bottom: var(--spacing-2); gap: var(--spacing-2); }
    .navbar-nav.navbar-right { margin-top: var(--spacing-2); padding-top: var(--spacing-2); border-top: 1px solid var(--border-color); }
    .navbar-toggler { display: block; }
    .dropdown-menu { position: static; box-shadow: none; border: none; padding-left: var(--spacing-2); display: none; }
    .dropdown.active .dropdown-menu { display: block; }
    
    .admin-navbar .navbar-menu { background-color: #212529; border-bottom-color: #343a40; }
    .admin-navbar .navbar-nav.navbar-right { border-top-color: #343a40; }

    .shop-container { flex-direction: column; }
    .shop-sidebar { flex: none; width: 100%; position: static; margin-bottom: var(--spacing-3); }
    .product-details { grid-template-columns: 1fr; gap: var(--spacing-3); }

    .cart-layout { flex-direction: column; }
    .cart-sidebar { flex: none; width: 100%; position: static; }
    .cart-table th, .cart-table td { padding: 8px 4px; }
    .cart-item-img { display: none; }
}