/* ==========================================================================
   1. Design Variables & Base Resets
   ========================================================================== */
:root {
    --primary-blue: #2B3E5C;
    --dark-blue: #1A283E;
    --cream-accent: #FFFCE6;
    --light-bg: #F9FAFC;
    --text-color: #333333;
    --white: #FFFFFF;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    color: var(--text-color);
    background-color: var(--light-bg);
    line-height: 1.6;
    padding-top: 80px; /* Offset for fixed header */
}

/* ==========================================================================
   2. Header & Navigation Menu
   ========================================================================== */
header {
    background-color: var(--primary-blue);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 8%;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.logo-container a {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 12px;
}

.logo-container img {
    height: 50px;
    width: auto;
    border-radius: 4px;
    object-fit: contain;
}

.logo-container h1 {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.logo-container h1 span {
    color: var(--cream-accent);
}

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

nav ul li a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition);
    position: relative;
    padding-bottom: 4px;
}

nav ul li a:hover {
    color: var(--cream-accent);
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--cream-accent);
    transition: var(--transition);
}

nav ul li a:hover::after {
    width: 100%;
}

.menu-toggle {
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    display: none;
}

/* ==========================================================================
   3. Hero Showcase Section
   ========================================================================== */
.hero {
    height: 75vh;
    min-height: 480px;
    background: linear-gradient(rgba(43, 62, 92, 0.88), rgba(26, 40, 62, 0.95)), 
                url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="60" height="60" viewBox="0 0 60 60"><path d="M0 0h30v30H0zm30 30h30v30H30z" fill="%23FFF" fill-opacity=".02"/></svg>');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 20px;
}

.hero-content h2 {
    color: var(--white);
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.hero-content p {
    color: var(--cream-accent);
    font-size: 1.25rem;
    max-width: 650px;
    margin: 0 auto 35px auto;
    opacity: 0.95;
}

.btn {
    display: inline-block;
    background-color: var(--cream-accent);
    color: var(--dark-blue);
    padding: 14px 36px;
    text-decoration: none;
    font-weight: 600;
    border-radius: 30px;
    transition: var(--transition);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.btn:hover {
    background-color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

/* ==========================================================================
   4. About Identity Section
   ========================================================================== */
.about {
    padding: 90px 15%;
    text-align: center;
    background-color: var(--white);
}

.about h2 {
    color: var(--primary-blue);
    font-size: 2.25rem;
    margin-bottom: 20px;
}

.about h2::after {
    content: '';
    display: block;
    width: 65px;
    height: 4px;
    background-color: var(--primary-blue);
    margin: 12px auto 0 auto;
    border-radius: 2px;
}

.about p {
    font-size: 1.15rem;
    color: #555555;
    max-width: 800px;
    margin: 0 auto;
}

/* ==========================================================================
   5. Dynamic Product Grid & Sorting Mechanics
   ========================================================================== */
.products {
    padding: 90px 8%;
    background-color: var(--light-bg);
}

.products h2 {
    text-align: center;
    color: var(--primary-blue);
    font-size: 2.25rem;
    margin-bottom: 40px;
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 45px;
    flex-wrap: wrap;
}

.filter-btn {
    background-color: var(--white);
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    padding: 10px 26px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--primary-blue);
    color: var(--white);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 30px;
}

.product-card {
    background-color: var(--white);
    border-radius: 12px;
    padding: 35px 25px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.02);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    opacity: 1;
    transform: scale(1);
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 28px rgba(43, 62, 92, 0.12);
}

.product-icon {
    font-size: 2.8rem;
    color: var(--primary-blue);
    margin-bottom: 22px;
}

.product-card h3 {
    font-size: 1.35rem;
    margin-bottom: 12px;
    color: var(--dark-blue);
}

.product-card p {
    font-size: 0.95rem;
    color: #666666;
    margin-bottom: 24px;
    flex-grow: 1;
}

.tag {
    display: inline-block;
    background-color: #F1F4F8;
    color: var(--primary-blue);
    padding: 6px 16px;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 15px;
    align-self: center;
    border: 1px solid rgba(43, 62, 92, 0.1);
}

/* ==========================================================================
   6. Footer Matrix & Contact Details
   ========================================================================== */
footer {
    background-color: var(--dark-blue);
    color: var(--white);
    padding: 70px 8% 25px 8%;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 45px;
}

.footer-info h3, .footer-socials h3 {
    font-size: 1.4rem;
    margin-bottom: 22px;
    color: var(--cream-accent);
    font-weight: 600;
}

.footer-info p {
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.9);
}

.footer-info i {
    color: var(--cream-accent);
    width: 20px;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    width: 46px;
    height: 46px;
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    text-decoration: none;
    transition: var(--transition);
}

.social-icons a:hover {
    background-color: var(--cream-accent);
    color: var(--dark-blue);
    transform: translateY(-4px);
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 25px;
    font-size: 0.9rem;
    color: #A0AEC0;
}

/* ==========================================================================
   7. Device Layout Breakthroughs (Responsive)
   ========================================================================== */
@media (max-width: 768px) {
    body {
        padding-top: 75px;
    }

    .menu-toggle {
        display: block;
    }

    nav {
        position: absolute;
        top: 75px;
        left: -100%;
        width: 100%;
        background-color: var(--primary-blue);
        transition: var(--transition);
        box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
    }

    nav.active {
        left: 0;
    }

    nav ul {
        flex-direction: column;
        padding: 25px 0;
        gap: 0;
        text-align: center;
    }

    nav ul li a {
        display: block;
        padding: 15px 0;
        font-size: 1.1rem;
    }
    
    nav ul li a::after {
        display: none;
    }

    .hero-content h2 {
        font-size: 2.2rem;
    }

    .footer-container {
        flex-direction: column;
        gap: 30px;
    }
}