/* --- CSS VARIABLES (Design System) --- */
:root {
    --bg-color: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --brand-dark: #0f172a;
    --brand-accent: #ea580c; /* Deep Orange for Sports Energy */
    --brand-accent-hover: #c2410c;
    --surface: #f8fafc;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s ease;
}

/* --- RESET & BASE --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
}

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

.text-accent { color: var(--brand-accent); }
.section-padding { padding: 80px 20px; }
.section-title { text-align: center; font-size: 2.5rem; margin-bottom: 40px; color: var(--brand-dark); }

/* --- NAVIGATION --- */
.navbar {
    background: var(--bg-color);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    cursor: pointer;
    letter-spacing: -0.5px;
}

.nav-links button {
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-main);
    margin-left: 24px;
    cursor: pointer;
    transition: var(--transition);
}

.nav-links button:hover { color: var(--brand-accent); }
.mobile-menu { display: none; font-size: 1.5rem; cursor: pointer; }

/* --- HERO SECTION --- */
.hero {
    height: calc(100vh - 70px);
    background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.9)), url('https://images.unsplash.com/photo-1534158914592-062992fbe900?auto=format&fit=crop&q=80&w=1920') center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.hero h1 { font-size: 4rem; font-weight: 800; margin-bottom: 20px; }
.hero p { font-size: 1.2rem; max-width: 600px; margin: 0 auto 30px; color: #cbd5e1; }

/* --- BUTTONS --- */
.btn-primary {
    background-color: var(--brand-accent);
    color: white;
    padding: 12px 28px;
    border: none;
    border-radius: 6px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}
.btn-primary:hover { background-color: var(--brand-accent-hover); transform: translateY(-2px); }

/* --- LAYOUTS (Grid) --- */
.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

/* --- CARDS (Products & About) --- */
.card {
    background: var(--bg-color);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.card:hover { transform: translateY(-5px); box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); }
.card-img { width: 100%; height: 250px; object-fit: cover; background: var(--surface); }
.card-body { padding: 20px; }
.card-price { font-size: 1.25rem; font-weight: 800; color: var(--brand-accent); margin: 10px 0; }

.about-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.about-content .card { padding: 30px; text-align: center; }

/* --- CONTACT SECTION --- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.map-placeholder { background: var(--surface); border: 1px dashed var(--border); height: 200px; display: flex; align-items: center; justify-content: center; margin-top: 20px; color: var(--text-muted); border-radius: 8px;}
.contact-form { display: flex; flex-direction: column; gap: 15px; }
.contact-form input, .contact-form textarea { width: 100%; padding: 12px; border: 1px solid var(--border); border-radius: 6px; font-family: inherit; }
.contact-form input:focus, .contact-form textarea:focus { outline: 2px solid var(--brand-accent); border-color: transparent; }

/* --- FOOTER --- */
footer { background: var(--brand-dark); color: white; padding: 60px 20px 20px; }
.footer-content { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid #334155; padding-bottom: 40px; margin-bottom: 20px; }
.footer-socials a { color: #cbd5e1; text-decoration: none; margin-left: 20px; transition: var(--transition); }
.footer-socials a:hover { color: var(--brand-accent); }
.footer-bottom { text-align: center; color: #64748b; font-size: 0.9rem; }

/* --- SPA ROUTING & ANIMATIONS --- */
.page-section { display: none; }
.page-section.active { display: block; }
.fade-in { animation: fadeIn 0.6s ease-out forwards; }

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

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 768px) {
    .nav-links { display: none; flex-direction: column; position: absolute; top: 70px; left: 0; width: 100%; background: var(--bg-color); padding: 20px; box-shadow: var(--shadow); }
    .nav-links.active { display: flex; }
    .nav-links button { margin: 10px 0; text-align: left; }
    .mobile-menu { display: block; }
    .hero h1 { font-size: 2.5rem; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-content { flex-direction: column; text-align: center; gap: 20px; }
    .footer-socials a { margin: 0 10px; }
}
/* --- PRODUCT DETAILS PAGE --- */
.btn-back {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 30px;
    transition: var(--transition);
}
.btn-back:hover { color: var(--brand-accent); }

.product-details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.product-details-image {
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow);
    background: var(--surface);
    object-fit: cover;
}

.product-info-brand {
    font-size: 1rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.product-info-title {
    font-size: 2.5rem;
    color: var(--brand-dark);
    margin: 10px 0;
    line-height: 1.2;
}

.product-info-price {
    font-size: 2rem;
    font-weight: 800;
    color: var(--brand-accent);
    margin-bottom: 20px;
}

.product-info-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.product-specs {
    list-style: none;
    margin-bottom: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.product-specs li {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--surface);
}

.product-specs li strong { color: var(--brand-dark); }

/* Responsive adjustments for the details page */
@media (max-width: 768px) {
    .product-details-grid { grid-template-columns: 1fr; gap: 30px; }
    .product-info-title { font-size: 2rem; }
}
/* --- MODAL STYLES --- */
.modal-overlay {
    position: fixed;
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%;
    background: rgba(15, 23, 42, 0.7); /* Dark semi-transparent background */
    backdrop-filter: blur(5px); /* Modern blur effect */
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000; /* Stays above the sticky header */
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-color);
    width: 90%;
    max-width: 500px;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    position: relative;
    transform: translateY(30px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.close-modal {
    position: absolute;
    top: 15px; 
    right: 20px;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition);
    line-height: 1;
}

.close-modal:hover { color: var(--brand-accent); }

.modal-header h3 { color: var(--brand-dark); margin-bottom: 15px; font-size: 1.5rem; }
.modal-body p { margin-bottom: 15px; color: var(--text-main); }

.contact-card {
    background: var(--surface);
    padding: 15px;
    border-radius: 8px;
    border: 1px dashed var(--brand-accent);
    margin: 20px 0;
    font-weight: 600;
    text-align: center;
}
.contact-card p { margin-bottom: 5px; color: var(--brand-dark); }
.contact-card p:last-child { margin-bottom: 0; }