/* CSS Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* CSS Variables */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-secondary: #0f172a;
    --color-accent: #f59e0b;
    --color-bg: #f8fafc;
    --color-bg-alt: #ffffff;
    --color-text: #334155;
    --color-text-light: #64748b;
    --color-text-dark: #0f172a;
    --color-border: #e2e8f0;
    --color-success: #10b981;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --max-width: 1200px;
}

/* Base Styles */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-dark);
    line-height: 1.2;
    margin-bottom: 0.5em;
}

h1 { font-size: 2.5rem; font-weight: 700; }
h2 { font-size: 2rem; font-weight: 600; }
h3 { font-size: 1.5rem; font-weight: 600; }
h4 { font-size: 1.25rem; font-weight: 600; }

p {
    margin-bottom: 1rem;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Layout */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1rem;
}

.section {
    padding: 4rem 0;
}

.section-alt {
    background-color: var(--color-bg-alt);
}

/* Grid System */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 992px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 576px) {
    .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
}

/* Header */
.header {
    background-color: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo:hover {
    color: var(--color-primary);
}

.nav {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-weight: 500;
    transition: all 0.2s ease;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-alt);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
    }

    .nav.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }
}

/* Footer */
.footer {
    background-color: var(--color-secondary);
    color: #cbd5e1;
    padding: 3rem 0 1.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-col h4 {
    color: #fff;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #94a3b8;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.875rem;
    color: #64748b;
}

.footer-bottom a {
    color: #94a3b8;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #fff;
}

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

.btn-secondary {
    background-color: var(--color-bg);
    color: var(--color-text-dark);
    border: 1px solid var(--color-border);
}

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

.btn-amazon {
    background-color: #ff9900;
    color: #111;
}

.btn-amazon:hover {
    background-color: #e88b00;
    color: #111;
}

/* Cards */
.card {
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: all 0.2s ease;
}

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

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

.card-body {
    padding: 1.5rem;
}

.card-title {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.card-text {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

/* Product Cards */
.product-card {
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

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

.product-image {
    width: 100%;
    height: 220px;
    object-fit: contain;
    background-color: #fff;
    padding: 1rem;
}

.product-body {
    padding: 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

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

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

.product-specs {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 0.75rem;
}

.product-features {
    list-style: none;
    margin-bottom: 1rem;
    flex: 1;
}

.product-features li {
    font-size: 0.85rem;
    padding: 0.25rem 0;
    padding-left: 1.25rem;
    position: relative;
    color: var(--color-text);
}

.product-features li::before {
    content: "\2713";
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.product-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-dark);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #3b82f6 100%);
    color: #fff;
    padding: 5rem 0;
    text-align: center;
}

.hero h1 {
    color: #fff;
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 2rem;
}

@media (max-width: 576px) {
    .hero {
        padding: 3rem 0;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .hero p {
        font-size: 1rem;
    }
}

/* Category Cards */
.category-card {
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    border: 1px solid var(--color-border);
    transition: all 0.2s ease;
}

.category-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.category-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.category-card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 0;
}

/* Table Styles */
.table-wrapper {
    overflow-x: auto;
    margin: 1.5rem 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-md);
    overflow: hidden;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

th {
    background-color: var(--color-secondary);
    color: #fff;
    font-weight: 600;
}

tr:hover {
    background-color: var(--color-bg);
}

/* Breadcrumbs */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 1rem 0;
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.breadcrumb a {
    color: var(--color-text-light);
}

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

.breadcrumb-separator {
    color: var(--color-border);
}

/* Page Header */
.page-header {
    background-color: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    padding: 2rem 0;
}

.page-header h1 {
    margin-bottom: 0.5rem;
}

.page-header p {
    color: var(--color-text-light);
    font-size: 1.125rem;
    margin-bottom: 0;
    max-width: 700px;
}

/* Content Styles */
.content {
    max-width: 800px;
}

.content h2 {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.content h2:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.content ul, .content ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.content li {
    margin-bottom: 0.5rem;
}

/* Info Box */
.info-box {
    background-color: #eff6ff;
    border: 1px solid #bfdbfe;
    border-left: 4px solid var(--color-primary);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-sm);
    margin: 1.5rem 0;
}

.info-box h4 {
    color: var(--color-primary-dark);
    margin-bottom: 0.5rem;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    text-transform: uppercase;
}

.badge-primary {
    background-color: #dbeafe;
    color: var(--color-primary-dark);
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }