:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --dark: #0f172a;
    --light: #f8fafc;
    --white: #ffffff;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --text-main: #334155;
    --text-light: #94a3b8;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --radius: 0.75rem;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s;
}

ul {
    list-style: none;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 5rem 0;
}

.bg-light {
    background-color: var(--gray-100);
}

.bg-dark {
    background-color: var(--dark);
    color: var(--white);
}

.text-white { color: var(--white); }
.text-white-50 { color: rgba(255, 255, 255, 0.7); }

/* Typography */
h1, h2, h3 {
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 700;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }

.section-title {
    text-align: center;
    margin-bottom: 1rem;
}

.section-desc {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3rem;
    font-size: 1.125rem;
    color: var(--secondary);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid transparent;
}

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

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

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

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

/* Header */
.header {
    background-color: var(--white);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
}

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

.nav {
    display: flex;
    gap: 2rem;
}

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

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--dark) 0%, #1e3a8a 100%);
    color: var(--white);
    padding: 8rem 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: #93c5fd;
}

.hero-text {
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

/* About Grid */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.about-item {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.about-item h3 {
    color: var(--primary);
    margin-bottom: 1rem;
}

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    text-align: center;
    padding: 1.5rem;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

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

/* Products */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    align-items: start;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 2rem;
    color: var(--text-main);
    position: relative;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.product-card.featured {
    border: 2px solid var(--primary);
    transform: scale(1.05);
    z-index: 10;
}

.product-tag {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: var(--white);
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.product-header {
    text-align: center;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--gray-200);
    padding-bottom: 1.5rem;
}

.product-header h3 {
    margin-bottom: 0.5rem;
}

.product-header .price {
    font-size: 1.25rem;
    color: var(--primary);
    font-weight: 600;
}

.product-features {
    margin-bottom: 2rem;
    flex-grow: 1;
}

.product-features li {
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.product-card .btn {
    width: 100%;
    text-align: center;
}

/* Contact */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.contact-text p {
    margin-bottom: 1rem;
}

.contact-info {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--gray-100);
    border-radius: var(--radius);
}

.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.contact-form h3 {
    margin-bottom: 1.5rem;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    font-family: inherit;
}

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

/* Footer */
.footer {
    background: var(--dark);
    color: var(--text-light);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    
    .header-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .product-card.featured {
        transform: none;
    }
}