/* ========================================
   EVERPHANT - Main Stylesheet
   Professional E-commerce Website
   ======================================== */

/* CSS Variables for easy customization */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --border-color: #dee2e6;
    --success-color: #27ae60;
    --max-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
}

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

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.site-header {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.site-logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
    letter-spacing: 1px;
}

.site-logo:hover {
    color: #ecf0f1;
}

/* Navigation */
.main-nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.main-nav a {
    color: white;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}

.cart-icon {
    position: relative;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--accent-color);
    border-radius: 4px;
    font-weight: 600;
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background-color: var(--success-color);
    color: white;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

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

.btn-success:hover {
    background-color: #229954;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid white;
    color: white;
}

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

.btn-block {
    display: block;
    width: 100%;
}

/* Product Grid */
.products-section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.product-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

.product-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    background-color: var(--light-bg);
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="280" height="250" viewBox="0 0 280 250"><rect fill="%23f8f9fa" width="280" height="250"/><g fill="%233498db" opacity="0.3"><path d="M140 80 L170 125 L110 125 Z"/><circle cx="100" cy="70" r="15"/><rect x="60" y="135" width="160" height="8" rx="4"/><rect x="80" y="155" width="120" height="6" rx="3"/></g><text x="140" y="200" font-family="Arial,sans-serif" font-size="14" fill="%239e9e9e" text-anchor="middle">EVERPHANT</text></svg>');
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
}

.product-info {
    padding: var(--spacing-md);
}

.product-brand {
    font-size: 0.875rem;
    color: var(--secondary-color);
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: var(--spacing-xs);
}

.product-name {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-color);
}

.product-description {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.product-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: var(--spacing-sm);
}

/* Product Detail Page */
.product-detail {
    padding: var(--spacing-xl) 0;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.product-detail-image {
    width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--light-bg);
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="600" height="600" viewBox="0 0 600 600"><rect fill="%23f8f9fa" width="600" height="600"/><g fill="%233498db" opacity="0.3"><path d="M300 200 L370 300 L230 300 Z"/><circle cx="230" cy="180" r="30"/><rect x="150" y="340" width="300" height="15" rx="7"/><rect x="180" y="370" width="240" height="12" rx="6"/><rect x="200" y="395" width="200" height="10" rx="5"/></g><text x="300" y="500" font-family="Arial,sans-serif" font-size="32" fill="%239e9e9e" text-anchor="middle">EVERPHANT</text></svg>');
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
}

.product-detail-info h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.product-detail-brand {
    font-size: 1.125rem;
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.product-detail-price {
    font-size: 2.5rem;
    color: var(--accent-color);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.product-detail-description {
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    color: #555;
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.quantity-selector label {
    font-weight: 600;
}

.quantity-selector input {
    width: 80px;
    padding: var(--spacing-xs);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    text-align: center;
}

/* Cart Page */
.cart-section {
    padding: var(--spacing-xl) 0;
    min-height: 60vh;
}

.cart-empty {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.cart-empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.3;
}

.cart-items {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: var(--spacing-lg);
}

.cart-item {
    display: grid;
    grid-template-columns: 100px 1fr auto;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    align-items: center;
}

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

.cart-item-image {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 4px;
    background-color: var(--light-bg);
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect fill="%23f8f9fa" width="100" height="100"/><g fill="%233498db" opacity="0.3"><path d="M50 30 L65 50 L35 50 Z"/><circle cx="35" cy="25" r="6"/><text x="50" y="75" font-family="Arial,sans-serif" font-size="10" fill="%239e9e9e" text-anchor="middle">EVERPHANT</text></g></svg>');
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
}

.cart-item-info h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--primary-color);
}

.cart-item-price {
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: var(--spacing-xs);
}

.cart-item-quantity {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xs);
}

.cart-item-quantity input {
    width: 60px;
    padding: 0.25rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    text-align: center;
}

.cart-item-remove {
    color: var(--accent-color);
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--accent-color);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.cart-item-remove:hover {
    background-color: var(--accent-color);
    color: white;
}

.cart-summary {
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-lg);
    max-width: 400px;
    margin-left: auto;
}

.cart-summary h2 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.cart-summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.cart-summary-total {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: var(--spacing-sm);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--primary-color);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Content Pages */
.content-page {
    padding: var(--spacing-xl) 0;
}

.content-page h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
}

.content-page h2 {
    font-size: 1.75rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.content-page h3 {
    font-size: 1.25rem;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.content-page p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    color: #555;
}

.content-page ul,
.content-page ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.content-page li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.8;
}

/* Footer */
.site-footer {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: #ecf0f1;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.9rem;
}

/* Alerts */
.alert {
    padding: var(--spacing-md);
    border-radius: 4px;
    margin-bottom: var(--spacing-md);
}

.alert-success {
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.alert-error {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.alert-info {
    background-color: #d1ecf1;
    border: 1px solid #bee5eb;
    color: #0c5460;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .main-nav ul {
        flex-direction: column;
        gap: var(--spacing-xs);
        text-align: center;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: var(--spacing-md);
    }

    .product-detail-grid {
        grid-template-columns: 1fr;
    }

    .cart-item {
        grid-template-columns: 80px 1fr;
    }

    .cart-item-actions {
        grid-column: 1 / -1;
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-top: var(--spacing-sm);
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.5rem;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .cart-item {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .cart-item-image {
        margin: 0 auto;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.hidden {
    display: none;
}