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

:root {
    --primary-color: #0066cc;
    --secondary-color: #1a1a1a;
    --accent-color: #ff6b35;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

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

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

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

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

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

.cart-icon {
    position: relative;
    cursor: pointer;
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--accent-color);
    color: var(--white);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: bold;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 4rem 0;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.hero-features span {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    backdrop-filter: blur(10px);
}

.price-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.original-price {
    font-size: 1.25rem;
    text-decoration: line-through;
    opacity: 0.7;
}

.current-price {
    font-size: 2.5rem;
    font-weight: bold;
}

.discount-badge {
    background: var(--accent-color);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: bold;
}

.color-selector {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease 0.8s backwards;
}

.color-label {
    font-weight: 500;
}

.color-option {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 3px solid transparent;
    cursor: pointer;
    transition: transform 0.3s, border-color 0.3s;
}

.color-option:hover {
    transform: scale(1.1);
}

.color-option.active {
    border-color: var(--white);
    transform: scale(1.15);
}

.cta-button {
    background: var(--white);
    color: var(--primary-color);
    border: none;
    padding: 1rem 3rem;
    font-size: 1.125rem;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    animation: fadeInUp 0.8s ease 1s backwards;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.cta-button:active {
    transform: translateY(-1px);
}

/* Watch Display */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease;
}

.watch-display {
    position: relative;
    animation: float 3s ease-in-out infinite;
}

.watch-frame {
    width: 280px;
    height: 340px;
    background: linear-gradient(145deg, #2a2a2a, #1a1a1a);
    border-radius: 50px;
    padding: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    position: relative;
    z-index: 2;
}

.watch-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, #1a1a1a, #0a0a0a);
    border-radius: 35px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--white);
    overflow: hidden;
    position: relative;
}

.watch-screen::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
}

.time {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 1rem;
    position: relative;
}

.stats {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 1rem;
    position: relative;
}

.watch-strap {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 320px;
    height: 400px;
    background: linear-gradient(145deg, #333, #222);
    border-radius: 60px;
    z-index: 1;
}

/* Features Section */
.features {
    padding: 5rem 0;
    background: var(--light-bg);
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--secondary-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

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

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* Specs Section */
.specs {
    padding: 5rem 0;
}

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

.spec-item {
    background: var(--light-bg);
    padding: 1.5rem;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.spec-label {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.spec-value {
    font-size: 1.125rem;
    color: var(--secondary-color);
}

/* Reviews Section */
.reviews {
    padding: 5rem 0;
    background: var(--light-bg);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.review-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.stars {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.review-text {
    color: #666;
    margin-bottom: 1rem;
    font-style: italic;
    line-height: 1.8;
}

.review-author {
    color: var(--secondary-color);
    font-weight: 600;
}

/* Footer */
.footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 0.7;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--white);
    margin: 5% auto;
    padding: 2rem;
    border-radius: 15px;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    animation: slideDown 0.3s ease;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: var(--secondary-color);
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid #eee;
}

.cart-item-info {
    flex: 1;
}

.cart-item-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.cart-item-color {
    font-size: 0.875rem;
    color: #666;
}

.cart-item-price {
    font-weight: bold;
    color: var(--primary-color);
}

.remove-item {
    background: var(--accent-color);
    color: var(--white);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: opacity 0.3s;
}

.remove-item:hover {
    opacity: 0.8;
}

.empty-cart {
    text-align: center;
    padding: 2rem;
    color: #999;
}

.cart-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    margin-top: 1rem;
    font-size: 1.25rem;
    font-weight: bold;
    border-top: 2px solid #eee;
}

.checkout-button {
    width: 100%;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 1rem;
    font-size: 1.125rem;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    margin-top: 1rem;
    transition: background 0.3s;
}

.checkout-button:hover {
    background: #0052a3;
}

.checkout-button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-image {
        order: -1;
    }

    .watch-frame {
        width: 220px;
        height: 270px;
    }

    .watch-strap {
        width: 250px;
        height: 320px;
    }

    .time {
        font-size: 2rem;
    }

    .stats {
        font-size: 0.875rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .features-grid,
    .reviews-grid {
        grid-template-columns: 1fr;
    }

    .hero-features {
        justify-content: center;
    }

    .color-selector {
        justify-content: center;
    }
}