/* ===== BASE STYLES ===== */
:root {
    --primary-dark: #121212;
    --secondary-dark: #1E1E1E;
    --tertiary-dark: #2A2A2A;
    --primary-accent: #1E90FF;
    --secondary-accent: #4DA6FF;
    --text-primary: #E0E0E0;
    --text-secondary: #A0A0A0;
}

body {
    background-color: var(--primary-dark);
    color: var(--text-primary);
    font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    margin: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== HEADER ===== */
header {
    background-color: var(--secondary-dark);
    padding: 20px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

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

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

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

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

/* ===== BUTTONS ===== */
.cta-button {
    background-color: var(--primary-accent);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

.cta-button:hover {
    background-color: var(--secondary-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(30, 144, 255, 0.3);
}

/* ===== PRODUCT PAGE SPECIFIC ===== */
.product-hero {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--primary-dark) 100%);
}

.product-hero-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.product-image {
    flex: 1;
    text-align: center;
}

.product-image img {
    max-width: 100%;
    border-radius: 10px;
}

.product-info {
    flex: 1;
}

h1, h2, h3 {
    color: var(--primary-accent);
    margin-bottom: 20px;
}

.product-price {
    font-size: 1.8rem;
    color: var(--secondary-accent);
    margin: 20px 0;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 30px 0;
}

.spec-item {
    background-color: var(--tertiary-dark);
    padding: 15px;
    border-radius: 5px;
    border-left: 3px solid var(--primary-accent);
}

.product-features {
    padding: 60px 0;
    background-color: var(--secondary-dark);
}

.feature-columns {
    display: flex;
    gap: 40px;
}

.feature-column {
    flex: 1;
}

.feature-item {
    margin-bottom: 30px;
}

.product-cta {
    padding: 60px 0;
    text-align: center;
}

/* ===== FOOTER ===== */
footer {
    background-color: var(--tertiary-dark);
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--secondary-dark);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .product-hero-content, .feature-columns {
        flex-direction: column;
    }
    
    .specs-grid {
        grid-template-columns: 1fr;
    }
    
    .header-container {
        flex-direction: column;
        gap: 20px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
}