/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    color: #E0E7FF; /* Metallic Silver */
    background-color: #0A1A2B; /* Deep Navy Blue */
    line-height: 1.6;
}

h1, h2, h3, h4 {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

/* Announcement Bar */
.announcement-bar {
    background-color: #00B8D4; /* Electric Cyan */
    color: #0A1A2B;
    text-align: center;
    padding: 0.5rem 0;
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* Header */
.header {
    background-color: rgba(10, 26, 43, 0.9); /* Semi-transparent Navy Blue */
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo a {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.8rem;
    color: #00B8D4; /* Electric Cyan */
    letter-spacing: 2px;
}

.nav-menu ul {
    display: flex;
    gap: 2rem;
}

.nav-menu ul li a {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 1px;
    transition: color 0.3s, text-shadow 0.3s;
}

.nav-menu ul li a:hover {
    color: #00B8D4;
    text-shadow: 0 0 5px rgba(0, 184, 212, 0.5);
}

.cart-icon a {
    font-size: 1.5rem;
    position: relative;
}

.cart-icon span {
    position: absolute;
    top: -5px;
    right: -10px;
    background-color: #00B8D4;
    color: #0A1A2B;
    border-radius: 50%;
    padding: 0.2rem 0.5rem;
    font-size: 0.8rem;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 0.3rem;
    cursor: pointer;
}

.hamburger div {
    width: 25px;
    height: 3px;
    background-color: #E0E7FF;
    transition: all 0.3s;
}

/* Hero Section */
.hero {
    height: 80vh;
    background-image: url('https://via.placeholder.com/1920x1080?text=Futuristic+Tech');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #E0E7FF;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(10, 26, 43, 0.7), rgba(10, 26, 43, 0.9));
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 2rem;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    letter-spacing: 3px;
    text-shadow: 0 0 10px rgba(0, 184, 212, 0.5);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    background-color: transparent;
    color: #00B8D4;
    padding: 0.8rem 2.5rem;
    border: 2px solid #00B8D4;
    font-weight: 600;
    letter-spacing: 2px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.cta-button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(0, 184, 212, 0.5);
    opacity: 0;
    border-radius: 50%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.cta-button:hover {
    background-color: #00B8D4;
    color: #0A1A2B;
    box-shadow: 0 0 15px rgba(0, 184, 212, 0.7);
}

.cta-button:hover::after {
    transform: scale(100, 100) translate(-50%);
    opacity: 0;
    transition: all 0.5s;
}

/* Features Section */
.features {
    padding: 5rem 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    text-align: center;
    background: linear-gradient(to bottom, #0A1A2B, #142238);
}

.feature-card {
    background-color: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 20px rgba(0, 184, 212, 0.3);
}

.feature-card i {
    font-size: 2.5rem;
    color: #00B8D4;
    margin-bottom: 1rem;
    text-shadow: 0 0 5px rgba(0, 184, 212, 0.5);
}

.feature-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
    letter-spacing: 1px;
}

/* Flash Sale Section */
.flash-sale {
    padding: 5rem 2rem;
    background: linear-gradient(to bottom, #142238, #0A1A2B);
    text-align: center;
}

.flash-header {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.flash-header h2 {
    font-size: 2.5rem;
    letter-spacing: 2px;
    color: #00B8D4;
    text-shadow: 0 0 10px rgba(0, 184, 212, 0.5);
}

.countdown {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: #00B8D4;
    text-shadow: 0 0 5px rgba(0, 184, 212, 0.5);
}

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

.product-card {
    background-color: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 15px rgba(0, 184, 212, 0.3);
}

.product-img {
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
    margin-bottom: 1rem;
    border: 1px solid rgba(0, 184, 212, 0.3);
}

.product-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

.product-card p {
    margin-bottom: 1rem;
}

.old-price {
    text-decoration: line-through;
    color: rgba(255, 255, 255, 0.5);
}

.add-to-cart {
    display: inline-block;
    background-color: transparent;
    color: #00B8D4;
    padding: 0.5rem 1.5rem;
    border: 2px solid #00B8D4;
    font-weight: 600;
    transition: all 0.3s;
}

.add-to-cart:hover {
    background-color: #00B8D4;
    color: #0A1A2B;
    box-shadow: 0 0 10px rgba(0, 184, 212, 0.5);
}

/* Categories Section */
.categories {
    padding: 5rem 2rem;
    text-align: center;
    background-color: #0A1A2B;
}

.categories h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #00B8D4;
    letter-spacing: 2px;
    text-shadow: 0 0 5px rgba(0, 184, 212, 0.5);
}

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

.category-card {
    height: 300px;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 184, 212, 0.3);
}

.category-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(10, 26, 43, 0.9), rgba(10, 26, 43, 0.5));
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #E0E7FF;
    opacity: 0;
    transition: opacity 0.3s;
}

.category-card:hover .category-overlay {
    opacity: 1;
}

.category-overlay h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    letter-spacing: 2px;
    color: #00B8D4;
}

.category-link {
    background-color: transparent;
    border: 2px solid #00B8D4;
    padding: 0.5rem 1.5rem;
    color: #00B8D4;
    font-weight: 600;
    letter-spacing: 1px;
    transition: all 0.3s;
}

.category-link:hover {
    background-color: #00B8D4;
    color: #0A1A2B;
    box-shadow: 0 0 10px rgba(0, 184, 212, 0.5);
}

/* Testimonials Section */
.testimonials {
    padding: 5rem 2rem;
    background: linear-gradient(to bottom, #0A1A2B, #142238);
    text-align: center;
}

.testimonials h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #00B8D4;
    letter-spacing: 2px;
}

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

.testimonial-card {
    background-color: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-style: italic;
    transition: transform 0.3s, box-shadow 0.3s;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 15px rgba(0, 184, 212, 0.3);
}

.testimonial-card p {
    margin-bottom: 1rem;
    font-size: 1rem;
}

.testimonial-card h4 {
    font-style: normal;
    font-size: 1.1rem;
    color: #00B8D4;
}

/* Newsletter Section */
.newsletter {
    padding: 5rem 2rem;
    background: linear-gradient(to bottom, #142238, #0A1A2B);
    text-align: center;
}

.newsletter h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #00B8D4;
    letter-spacing: 2px;
}

.newsletter p {
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.newsletter-form {
    display: flex;
    justify-content: center;
    gap: 1rem;
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form input {
    padding: 0.8rem;
    border: 1px solid rgba(0, 184, 212, 0.5);
    background-color: rgba(255, 255, 255, 0.05);
    color: #E0E7FF;
    width: 70%;
    font-family: 'Roboto', sans-serif;
    letter-spacing: 1px;
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.newsletter-form button {
    padding: 0.8rem 2rem;
    background-color: transparent;
    color: #00B8D4;
    border: 2px solid #00B8D4;
    font-weight: 600;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s;
}

.newsletter-form button:hover {
    background-color: #00B8D4;
    color: #0A1A2B;
    box-shadow: 0 0 10px rgba(0, 184, 212, 0.5);
}

/* Footer */
.footer {
    background: linear-gradient(to top, #0A1A2B, #142238);
    color: #E0E7FF;
    padding: 3rem 2rem 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-col h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #00B8D4;
    letter-spacing: 1px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-col ul li a {
    transition: color 0.3s, text-shadow 0.3s;
}

.footer-col ul li a:hover {
    color: #00B8D4;
    text-shadow: 0 0 5px rgba(0, 184, 212, 0.5);
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    font-size: 1.5rem;
    transition: color 0.3s, text-shadow 0.3s;
}

.social-icons a:hover {
    color: #00B8D4;
    text-shadow: 0 0 5px rgba(0, 184, 212, 0.5);
}

.footer-bottom {
    text-align: center;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }
    .nav-menu {
        display: none;
        position: absolute;
        top: 57px;
        left: 0;
        width: 100%;
        background-color: rgba(10, 26, 43, 0.95);
        padding: 1rem;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.3);
    }
    .nav-menu.active {
        display: block;
    }
    .nav-menu ul {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    .hamburger {
        display: flex;
    }
    .hero-content h1 {
        font-size: 2.5rem;
    }
    .hero-content p {
        font-size: 1rem;
    }
    .flash-header {
        flex-direction: column;
        gap: 1rem;
    }
    .newsletter-form {
        flex-direction: column;
        align-items: center;
    }
    .newsletter-form input {
        width: 100%;
    }
}