/* ============================================
   CANTEEN AI SYSTEM - ENHANCED CSS
   Modern, Beautiful, and Responsive Design
   ============================================ */

/* ===== GLOBAL STYLES ===== */
:root {
    --primary-color: #0d6efd;
    --primary-dark: #0a58ca;
    --primary-light: #3d8bfd;
    --success-color: #198754;
    --success-dark: #146c43;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #0dcaf0;
    --dark-color: #212529;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --shadow-xl: 0 12px 40px rgba(0,0,0,0.15);
    --gradient-primary: linear-gradient(135deg, #0d6efd 0%, #0099ff 100%);
    --gradient-success: linear-gradient(135deg, #198754 0%, #20c997 100%);
    --gradient-warm: linear-gradient(135deg, #ff6b6b 0%, #ffc107 100%);
    --gradient-cool: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--light-bg);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.display-1, .display-2, .display-3, .display-4, .display-5, .display-6 {
    font-weight: 800;
    letter-spacing: -0.02em;
}

.lead {
    font-size: 1.15rem;
    font-weight: 400;
    color: var(--text-secondary);
}

/* ===== NAVIGATION ===== */
.navbar {
    backdrop-filter: blur(10px);
    background-color: rgba(33, 37, 41, 0.95) !important;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    padding: 0.75rem 0;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
    color: var(--primary-light) !important;
}

.nav-link {
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 1rem !important;
    border-radius: 8px;
    margin: 0 0.25rem;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* ===== BUTTONS ===== */
.btn {
    font-weight: 600;
    padding: 0.625rem 1.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    color: white;
}

.btn-success {
    background: var(--gradient-success);
    color: white;
}

.btn-success:hover {
    background: var(--success-dark);
    color: white;
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.btn-outline-light {
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline-light:hover {
    background: white;
    color: var(--dark-color);
    border-color: white;
}

.btn-sm {
    padding: 0.375rem 1rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1rem;
}

.rounded-pill {
    border-radius: 50px !important;
}

.rounded-circle {
    border-radius: 50% !important;
}

/* ===== CARDS ===== */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
    background: var(--white);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background: #f8f9fa;
    border-top: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
}

/* Meal Cards */
.card-meal {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: none;
    box-shadow: var(--shadow-sm);
    height: 100%;
    overflow: hidden;
    position: relative;
}

.card-meal::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,0.1) 100%);
    opacity: 0;
    transition: var(--transition);
    z-index: 1;
    pointer-events: none;
}

.card-meal:hover::before {
    opacity: 1;
}

.card-meal:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.card-img-top {
    height: 200px;
    object-fit: cover;
    width: 100%;
    transition: var(--transition);
}

.card-meal:hover .card-img-top {
    transform: scale(1.1);
}

.addon-img {
    height: 120px;
    object-fit: cover;
    width: 100%;
    transition: var(--transition);
}

.card-meal:hover .addon-img {
    transform: scale(1.1);
}

/* AI Highlight Card */
.ai-card {
    border: 2px solid var(--warning-color);
    background: linear-gradient(135deg, #fffbf0 0%, #fff9e6 100%);
    position: relative;
    overflow: visible;
}

.ai-card::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #ffc107, #ff9800, #ffc107);
    border-radius: var(--border-radius);
    z-index: -1;
    opacity: 0;
    transition: var(--transition);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

.badge-ai {
    position: absolute;
    top: 15px;
    right: 15px;
    background: linear-gradient(135deg, #ffc107 0%, #ff9800 100%);
    color: #000;
    padding: 8px 16px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.75rem;
    box-shadow: var(--shadow-md);
    z-index: 10;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* ===== HERO SECTION ===== */
.hero-section {
    background: var(--gradient-primary);
    color: white;
    padding: 60px 0;
    margin-bottom: 40px;
    border-radius: 0 0 30px 30px;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero-section h1 {
    color: white;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
    position: relative;
    z-index: 1;
}

.hero-section .lead {
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    z-index: 1;
}

/* ===== FORMS ===== */
.form-control {
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    transition: var(--transition);
    font-size: 1rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
    outline: none;
}

.form-floating > label {
    color: var(--text-secondary);
    font-weight: 500;
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label {
    color: var(--primary-color);
}

.input-group .form-control {
    border-right: none;
}

.input-group .btn {
    border-left: none;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

/* ===== CART SECTION ===== */
.cart-section {
    background: linear-gradient(135deg, #fff8e1 0%, #fff3c4 100%);
    border: 2px solid var(--warning-color);
    border-radius: var(--border-radius);
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.cart-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 193, 7, 0.1) 0%, transparent 70%);
    animation: rotate 15s linear infinite;
}

.cart-section h2 {
    margin-top: 0;
    color: #f57c00;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.cart-sticky {
    position: sticky;
    top: 20px;
    z-index: 100;
}

.cart-sticky .card {
    box-shadow: var(--shadow-lg);
}

.cart-sticky .list-group-item {
    border: none;
    border-bottom: 1px dashed var(--border-color);
    padding: 1rem 0;
    transition: var(--transition);
}

.cart-sticky .list-group-item:hover {
    background-color: #f8f9fa;
    padding-left: 0.5rem;
}

.cart-sticky .list-group-item:last-child {
    border-bottom: none;
}

.cart-section table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 15px;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.cart-section th,
.cart-section td {
    border: 1px solid rgba(255, 220, 53, 0.3);
    padding: 12px;
    text-align: left;
}

.cart-section th {
    background: linear-gradient(135deg, #fff59d 0%, #ffeb3b 100%);
    font-weight: 600;
    color: #f57c00;
}

.cart-section tbody tr {
    transition: var(--transition);
}

.cart-section tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.5);
    transform: scale(1.01);
}

.remove-btn {
    background: linear-gradient(135deg, #e53935 0%, #c62828 100%);
    color: #fff;
    padding: 6px 12px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
}

.remove-btn:hover {
    background: linear-gradient(135deg, #c62828 0%, #b71c1c 100%);
    transform: scale(1.05);
    box-shadow: var(--shadow-sm);
    color: white;
}

.empty-cart {
    color: var(--text-secondary);
    font-style: italic;
    text-align: center;
    padding: 2rem;
}

.price-tag {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--success-color);
    background: linear-gradient(135deg, #198754 0%, #20c997 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== ALERTS ===== */
.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid;
    animation: slideIn 0.3s ease-out;
}

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

.alert-success {
    background: linear-gradient(135deg, #d1e7dd 0%, #badbcc 100%);
    color: #0f5132;
    border-left-color: var(--success-color);
}

.alert-danger {
    background: linear-gradient(135deg, #f8d7da 0%, #f5c2c7 100%);
    color: #842029;
    border-left-color: var(--danger-color);
}

.alert-warning {
    background: linear-gradient(135deg, #fff3cd 0%, #ffecb5 100%);
    color: #664d03;
    border-left-color: var(--warning-color);
}

.alert-info {
    background: linear-gradient(135deg, #cff4fc 0%, #b6effb 100%);
    color: #055160;
    border-left-color: var(--info-color);
}

.alert-dismissible .btn-close {
    padding: 0.75rem 1rem;
}

/* ===== BADGES ===== */
.badge {
    padding: 0.5em 0.75em;
    font-weight: 600;
    border-radius: 8px;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

.bg-primary {
    background: var(--gradient-primary) !important;
}

.bg-success {
    background: var(--gradient-success) !important;
}

.bg-warning {
    background: linear-gradient(135deg, #ffc107 0%, #ff9800 100%) !important;
    color: #000 !important;
}

.bg-danger {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%) !important;
}

/* ===== TABLES ===== */
.table {
    border-radius: var(--border-radius);
    overflow: hidden;
}

.table thead th {
    background: linear-gradient(135deg, #212529 0%, #343a40 100%);
    color: white;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
    border: none;
    padding: 1rem;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background-color: #f8f9fa;
    transform: scale(1.01);
    box-shadow: var(--shadow-sm);
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-color: var(--border-color);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.02);
}

.table-hover tbody tr:hover {
    background-color: rgba(13, 110, 253, 0.05);
}

.table-low-stock {
    background: linear-gradient(135deg, #fff3cd 0%, #ffe69c 100%) !important;
    color: #664d03;
    font-weight: 600;
}

.table-low-stock .badge {
    background-color: var(--danger-color) !important;
    animation: pulse 2s infinite;
}

/* ===== ADMIN DASHBOARD ===== */
.sidebar {
    background: linear-gradient(180deg, #212529 0%, #343a40 100%);
    min-height: 100vh;
    color: white;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.sidebar .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 15px 20px;
    margin: 5px 10px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.sidebar .nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: var(--primary-color);
    transform: scaleY(0);
    transition: var(--transition);
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    background: rgba(13, 110, 253, 0.2);
    color: white;
    transform: translateX(5px);
}

.sidebar .nav-link.active::before,
.sidebar .nav-link:hover::before {
    transform: scaleY(1);
}

.sidebar .nav-link.text-danger:hover {
    background: rgba(220, 53, 69, 0.2);
}

.img-thumbnail-sm {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: var(--border-radius);
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.img-thumbnail-sm:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

/* ===== ORDER CARDS ===== */
.order-card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    overflow: hidden;
    background: var(--white);
}

.order-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.status-Pending {
    border-left: 5px solid var(--warning-color);
    background: linear-gradient(135deg, #fffdf5 0%, #fff9e6 100%);
}

.status-Preparing {
    border-left: 5px solid var(--primary-color);
    background: linear-gradient(135deg, #f0f7ff 0%, #e3f2fd 100%);
}

.status-Ready {
    border-left: 5px solid var(--success-color);
    background: linear-gradient(135deg, #f0fff4 0%, #e8f5e9 100%);
}

.status-Completed {
    border-left: 5px solid #6c757d;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.status-Cancelled {
    border-left: 5px solid var(--danger-color);
    background: linear-gradient(135deg, #fff5f5 0%, #ffe0e0 100%);
}

.item-row {
    border-bottom: 1px dashed var(--border-color);
    padding: 8px 0;
    transition: var(--transition);
}

.item-row:hover {
    background-color: rgba(0, 0, 0, 0.02);
    padding-left: 10px;
}

.item-row:last-child {
    border-bottom: none;
}

.card-header-custom {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-bottom: 2px dashed var(--border-color);
    padding: 20px;
}

.total-price {
    font-size: 1.4rem;
    color: var(--success-color);
    font-weight: 700;
    background: linear-gradient(135deg, #198754 0%, #20c997 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.status-badge {
    font-size: 0.85rem;
    padding: 8px 16px;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== LOGIN/REGISTER PAGES ===== */
.login-card {
    width: 100%;
    max-width: 450px;
    border: none;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-card .card-header {
    background: var(--gradient-success);
    color: white;
    text-align: center;
    padding: 30px 20px;
    border: none;
}

.login-card .card-body {
    padding: 40px;
    background: var(--white);
}

/* ===== SEARCH BAR ===== */
.input-group {
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.input-group .form-control {
    border: none;
    padding: 1rem 1.5rem;
}

.input-group .btn {
    border: none;
    padding: 1rem 2rem;
}

/* ===== FOOTER ===== */
footer {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 4rem;
}

/* ===== UTILITIES ===== */
.shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}

.shadow {
    box-shadow: var(--shadow-md) !important;
}

.shadow-lg {
    box-shadow: var(--shadow-lg) !important;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .hero-section {
        padding: 40px 0;
        border-radius: 0 0 20px 20px;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .card-meal {
        margin-bottom: 1.5rem;
    }
    
    .cart-sticky {
        position: relative;
        top: 0;
    }
    
    .sidebar {
        min-height: auto;
        height: auto;
    }
    
    .price-tag {
        font-size: 1.1rem;
    }
}

@media (max-width: 576px) {
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8125rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .hero-section {
        padding: 30px 0;
    }
    
    .hero-section h1 {
        font-size: 1.75rem;
    }
}

/* ===== LOADING ANIMATIONS ===== */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.loading {
    animation: spin 1s linear infinite;
}

/* ===== SCROLLBAR STYLING ===== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #0d6efd 0%, #0099ff 100%);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ===== PRINT STYLES ===== */
@media print {
    .navbar,
    .btn,
    .cart-section,
    footer {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}