/* ============================================
   StationeryHub - Main Styles
   ============================================ */

/* CSS Variables */
:root {
    --primary: #2563EB;
    --primary-hover: #1D4ED8;
    --primary-light: #DBEAFE;
    --secondary: #10B981;
    --secondary-hover: #059669;
    --accent: #F59E0B;
    --danger: #EF4444;
    --dark: #1F2937;
    --gray: #6B7280;
    --gray-light: #9CA3AF;
    --light: #F9FAFB;
    --white: #FFFFFF;
    --border: #E5E7EB;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-full: 9999px;
    --transition: all 0.3s ease;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Be Vietnam Pro', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--dark);
    background-color: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: var(--primary);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-hover);
}

img {
    max-width: 100%;
    height: auto;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--dark);
}

/* Buttons */
.btn {
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    padding: 10px 20px;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-success {
    background-color: var(--secondary);
    border-color: var(--secondary);
}

.btn-success:hover {
    background-color: var(--secondary-hover);
    border-color: var(--secondary-hover);
}

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

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

/* Cards */
.card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

/* Forms */
.form-control, .form-select {
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    padding: 10px 14px;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* Badges */
.badge {
    font-weight: 500;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
}

/* ============================================
   Header & Navigation
   ============================================ */
header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .nav-link {
    color: var(--dark);
    font-weight: 500;
    font-size: 14px;
    padding: 8px 12px !important;
    position: relative;
    transition: var(--transition);
}

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

header .nav-link:hover {
    color: var(--primary);
}

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

/* Logo */
header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

header h1 a {
    color: var(--primary);
}

/* Search Bar */
.search-bar {
    position: absolute;
    top: 100%;
    right: 0;
    width: 320px;
    background-color: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 16px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
}

.search-bar.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ============================================
   Banner & Carousel
   ============================================ */
.carousel-item {
    border-radius: var(--radius);
    overflow: hidden;
}

.carousel-item > div {
    border-radius: var(--radius);
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
    width: 40px;
    height: 40px;
    background-color: rgba(255,255,255,0.9);
    border-radius: 50%;
    padding: 8px;
}

.carousel-indicators [data-bs-target] {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--primary);
}

/* ============================================
   Category Icons
   ============================================ */
.category-icon-wrapper {
    width: 70px;
    height: 70px;
    margin: 0 auto;
    background-color: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: var(--transition);
}

.category-icon-wrapper:hover {
    background-color: var(--primary);
    color: var(--white);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   Product Cards
   ============================================ */
.product-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    background: var(--white);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.product-card .card-img-top {
    aspect-ratio: 1;
    object-fit: cover;
    padding: 16px;
    background: var(--light);
}

.product-card:hover .card-img-top {
    transform: scale(1.05);
}

.product-card .card-body {
    padding: 16px;
}

.product-card .card-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--dark);
    line-height: 1.4;
    min-height: 2.8rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-card .card-title a {
    color: var(--dark);
}

.product-card .card-title a:hover {
    color: var(--primary);
}

.discount-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background-color: var(--danger);
    color: var(--white);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 12px;
    z-index: 10;
}

.new-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background-color: var(--secondary);
    color: var(--white);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 12px;
    z-index: 10;
}

/* Price styling */
.price-current {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
}

.price-original {
    font-size: 0.9rem;
    color: var(--gray-light);
    text-decoration: line-through;
}

/* ============================================
   Product Detail Page
   ============================================ */
.product-images .main-image {
    background: var(--light);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 12px;
}

.product-images .main-image img {
    width: 100%;
    max-height: 450px;
    object-fit: contain;
}

.thumbnail-images .thumbnail {
    cursor: pointer;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px;
    transition: var(--transition);
    background: var(--light);
}

.thumbnail-images .thumbnail:hover,
.thumbnail-images .thumbnail.active {
    border-color: var(--primary);
}

.thumbnail-images .thumbnail img {
    width: 100%;
    height: 80px;
    object-fit: contain;
}

.product-info h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.product-price-box {
    background: var(--light);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}

.quantity-control {
    display: flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    width: fit-content;
}

.quantity-control button {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--light);
    color: var(--dark);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.quantity-control button:hover {
    background: var(--primary);
    color: var(--white);
}

.quantity-control input {
    width: 60px;
    height: 40px;
    border: none;
    text-align: center;
    font-weight: 500;
    font-size: 1rem;
}

.product-policy {
    background: var(--light);
    border-radius: var(--radius);
    padding: 20px;
    margin-top: 20px;
}

.product-policy .policy-item {
    display: flex;
    align-items: center;
    padding: 8px 0;
}

.product-policy .policy-item i {
    color: var(--primary);
    margin-right: 12px;
    font-size: 1.1rem;
}

/* ============================================
   Cart Page
   ============================================ */
.cart-table {
    border-collapse: separate;
    border-spacing: 0;
}

.cart-table thead th {
    background: var(--light);
    font-weight: 600;
    padding: 14px;
    border-bottom: 2px solid var(--border);
}

.cart-table tbody td {
    padding: 16px 14px;
    vertical-align: middle;
    border-bottom: 1px solid var(--border);
}

.cart-product-image {
    width: 70px;
    height: 70px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    background: var(--light);
    padding: 8px;
}

.cart-summary {
    background: var(--light);
    border-radius: var(--radius);
    padding: 24px;
    position: sticky;
    top: 100px;
}

/* ============================================
   Checkout Page
   ============================================ */
.checkout-section {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 20px;
}

.checkout-section .section-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: 1.1rem;
}

.checkout-section .section-body {
    padding: 20px;
}

.payment-option {
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.payment-option:hover,
.payment-option.active {
    border-color: var(--primary);
    background: var(--primary-light);
}

.payment-option input[type="radio"] {
    margin-right: 12px;
}

.order-summary {
    background: var(--light);
    border-radius: var(--radius);
    padding: 24px;
}

/* ============================================
   Auth Pages (Login/Register)
   ============================================ */
.auth-container {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--white) 100%);
}

.auth-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 40px;
    width: 100%;
    max-width: 420px;
}

.auth-card h2 {
    text-align: center;
    margin-bottom: 8px;
}

.auth-card .subtitle {
    text-align: center;
    color: var(--gray);
    margin-bottom: 24px;
}

.auth-card .btn-primary {
    width: 100%;
    padding: 12px;
    font-size: 1rem;
}

.social-login {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.social-btn {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--white);
    color: var(--dark);
    font-weight: 500;
    transition: var(--transition);
}

.social-btn:hover {
    background: var(--light);
}

/* ============================================
   Footer
   ============================================ */
footer {
    background-color: var(--dark);
    color: var(--white);
    padding: 60px 0 0;
}

footer h5 {
    color: var(--white);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 20px;
}

footer a {
    color: var(--gray-light) !important;
    font-size: 0.9rem;
    transition: var(--transition);
}

footer a:hover {
    color: var(--white) !important;
}

footer p {
    color: var(--gray-light);
    font-size: 0.9rem;
}

footer .social-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    color: var(--white);
    margin-right: 8px;
    transition: var(--transition);
}

footer .social-icons a:hover {
    background: var(--primary);
    color: var(--white);
}

footer .newsletter-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    border-radius: var(--radius);
    padding: 30px;
    margin-bottom: 40px;
}

footer .copyright {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    margin-top: 40px;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 991.98px) {
    header .navbar-collapse {
        background: var(--white);
        padding: 16px;
        border-radius: var(--radius);
        box-shadow: var(--shadow-lg);
        margin-top: 8px;
    }
    
    .carousel-item > div {
        min-height: 250px;
    }
}

@media (max-width: 767.98px) {
    .product-card {
        margin-bottom: 16px;
    }
    
    .product-card .card-img-top {
        height: 180px;
    }
    
    .category-icon-wrapper {
        width: 56px;
        height: 56px;
    }
    
    .product-images .main-image img {
        max-height: 300px;
    }
    
    .cart-summary {
        position: static;
    }
    
    .auth-card {
        padding: 24px;
        margin: 16px;
    }
    
    footer {
        padding: 40px 0 0;
    }
}

@media (max-width: 575.98px) {
    .product-card .card-title {
        font-size: 0.9rem;
    }
    
    .product-info h1 {
        font-size: 1.25rem;
    }
    
    .carousel-item > div {
        min-height: 200px;
    }
    
    .carousel-item > div h1 {
        font-size: 1.5rem !important;
    }
}

/* ============================================
   Utilities
   ============================================ */
.bg-primary-light {
    background-color: var(--primary-light);
}

.text-primary {
    color: var(--primary) !important;
}

.border-primary {
    border-color: var(--primary) !important;
}

.rounded-lg {
    border-radius: var(--radius);
}

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