/* ==================== RESET & VARIABLES ==================== */
:root {
    --primary-color: #1e88e5;
    --primary-dark: #1565c0;
    --primary-light: #42a5f5;
    --secondary-color: #26a69a;
    --danger-color: #e53935;
    --success-color: #43a047;
    --warning-color: #fb8c00;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 20px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 16px;
}

/* ==================== ACCESSIBILITY ==================== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* ==================== HEADER & NAVIGATION ==================== */
header {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: var(--white);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    font-size: 2rem;
    animation: pulse 2s infinite;
}

.logo .highlight {
    color: #ffc107;
    font-weight: 900;
}

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

.nav-links li {
    position: relative;
}

.nav-link {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
    padding: 8px 0;
}

.nav-link:hover {
    color: #ffc107;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #ffc107;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.search-container {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 25px;
    padding: 8px 15px;
    gap: 8px;
    transition: var(--transition);
    min-width: 250px;
}

.search-container:hover,
.search-container:focus-within {
    background: rgba(255, 255, 255, 0.25);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.search-input {
    background: none;
    border: none;
    color: var(--white);
    font-size: 0.95rem;
    outline: none;
    width: 100%;
    padding: 5px 0;
    font-family: inherit;
}

.search-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.search-btn {
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    padding: 5px;
}

.search-btn:hover {
    transform: scale(1.15);
    color: #ffc107;
}

.cart-icon {
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

.cart-icon:hover {
    transform: scale(1.2);
}

.cart-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #ffc107;
    color: var(--primary-dark);
    border-radius: 50%;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
}

/* ==================== HERO SECTION ==================== */
.hero {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(30, 136, 229, 0.4)), 
                url('https://images.unsplash.com/photo-1556911220-e15b29be8c8f?auto=format&fit=crop&w=1600&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    height: 450px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(30, 136, 229, 0.1), rgba(38, 166, 154, 0.1));
    animation: gradientShift 6s ease infinite;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: relative;
    z-index: 2;
    animation: fadeInUp 1s ease-out;
}

.hero-content h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 1rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    letter-spacing: 1px;
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-block;
    padding: 12px 35px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ==================== CONTAINER & SECTIONS ==================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.products-section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin: 15px auto 0;
    border-radius: 2px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    animation: fadeIn 0.6s ease-out;
}

.product-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    display: flex;
    flex-direction: column;
    height: 100%;
    cursor: pointer;
    border: 1px solid #e0e0e0;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.product-card:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.product-image {
    width: 100%;
    height: 280px;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f5f5, #e0e0e0);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image img {
    max-width: 90%;
    max-height: 90%;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
    transition: transform 0.4s ease;
    background: #fafafa;
}

.product-card:hover .product-image img {
    transform: scale(1.08);
}

.product-info h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-color);
}

.description {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 12px;
    min-height: 40px;
}

.price {
    color: var(--danger-color);
    font-weight: 700;
    font-size: 1.4rem;
    margin: 12px 0;
}

.currency {
    font-size: 1rem;
    margin-left: 2px;
}

.add-to-cart {
    background: var(--success-color);
    color: var(--white);
    border: none;
    padding: 12px 20px;
    border-radius: 6px;
    cursor: pointer;
    width: 100%;
    font-weight: 600;
    transition: var(--transition);
    font-size: 0.95rem;
}

.add-to-cart:hover {
    background: #358a3f;
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(67, 160, 71, 0.3);
}

.add-to-cart:active {
    transform: scale(0.98);
}

/* ==================== FOOTER ==================== */
footer {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: var(--white);
    margin-top: 60px;
    padding: 40px 0 20px;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    margin-bottom: 15px;
    font-size: 1.1rem;
    font-weight: 600;
}

.footer-section p {
    line-height: 1.8;
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.9);
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: #ffc107;
    text-decoration: underline;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

/* ==================== ANIMATIONS ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

@keyframes gradientShift {
    0% {
        opacity: 0.3;
    }
    50% {
        opacity: 0.6;
    }
    100% {
        opacity: 0.3;
    }
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 768px) {
    .navbar {
        flex-wrap: wrap;
        gap: 15px;
    }

    .nav-links {
        width: 100%;
        gap: 15px;
    }

    .search-container {
        width: 100%;
        order: 3;
        min-width: auto;
    }

    .logo {
        font-size: 1.5rem;
    }

    .hero {
        height: 350px;
    }

    .hero-content h1 {
        font-size: 1.8rem;
    }

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

    .section-title {
        font-size: 1.8rem;
        margin-bottom: 30px;
    }

    .product-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 20px;
    }

    .product-image {
        height: 220px;
    }

    .product-info {
        padding: 15px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .navbar {
        padding: 0 10px;
    }

    .nav-links {
        gap: 10px;
        font-size: 0.9rem;
    }

    .search-container {
        width: 100%;
        min-width: auto;
        order: 3;
    }

    .logo {
        font-size: 1.3rem;
    }

    .logo-icon {
        font-size: 1.5rem;
    }

    .hero {
        height: 250px;
    }

    .hero-content h1 {
        font-size: 1.5rem;
    }

    .hero-content p {
        font-size: 0.9rem;
    }

    .btn {
        padding: 10px 25px;
        font-size: 0.9rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

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

    .product-image {
        height: 200px;
    }

    .price {
        font-size: 1.2rem;
    }
}

/* ==================== UTILITIES ==================== */
.text-center {
    text-align: center;
}

.mt-0 {
    margin-top: 0;
}

.mt-1 {
    margin-top: 10px;
}

.mt-2 {
    margin-top: 20px;
}

.mb-0 {
    margin-bottom: 0;
}

.mb-1 {
    margin-bottom: 10px;
}

.mb-2 {
    margin-bottom: 20px;
}