:root{
    /*color scheme*/
    --bg-primary: #0a0a0a;
    --bg-surface: #121212;
    --border-color: #262626;

    --text-primary: #ffffff;
    --text-secondary: #a3a3a3;
    --accent-hype: #00ff66;
    --accent-danger: #ef4444;
/*fonts*/
    --font-sans: 'Inter',system-ui,-apple-system, sans-serif;
/*layout n spacing*/
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --radius-sm:4px;
    --radius-md:8px;
/*performance optimization*/
    --transition-smooth: transform 0.4s cubic-bezier(0.25,1,0.5,1), opacity 0.3s ease;
}
    /*base styles*/

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
}
/*layout structure*/
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}
.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md)var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}
.logo {
    color: var(--text-primary);
    font-weight: 900;
    letter-spacing: 2px;
    font-size: 1.25rem;
    text-decoration: none;
}
.logo-sub {
    font-size: 0.75rem;
    color: var(--accent-hype);
    font-weight: 400;
    letter-spacing: 0;
    margin-left: 4px;
}
.site-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-left: auto;
}
.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: color 0.2s ease, background-color 0.2s ease;
}
.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.06);
}
.cart-trigger {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.85rem;
    transition: border-color 0.2s ease;
}
.cart-trigger:hover {
    border-color: var(--text-primary);
}
.cart-badge {
    background-color: var(--accent-hype);
    color: #000000;
    font-size: 0.75rem;
    font-weight: 800;
    padding: 2px 6px;
    border-radius: 10px;
}
/*product drop section*/
main {
    max-width: 1200px;
    margin: 4rem auto;
    padding: 0 var(--spacing-lg);
}
.landing-main,
.about-main {
    margin-top: 3rem;
}
.hero-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    min-height: calc(100vh - 180px);
}
.hero-title {
    font-size: 2.75rem;
    line-height: 0.95;
    font-weight: 900;
    max-width: 850px;
}
.hero-text,
.about-text {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
    max-width: 700px;
    margin-top: var(--spacing-md);
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}
.btn-link,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: auto;
    min-height: 48px;
    text-decoration: none;
}
.btn-secondary {
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    font-weight: 800;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}
.btn-secondary:hover {
    border-color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}
.hero-product {
    position: relative;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 1 / 1;
}
.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}
.feature-card,
.about-panel {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}
.feature-kicker {
    color: var(--accent-hype);
    font-size: 0.8rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
}
.feature-card h2 {
    font-size: 1.15rem;
    margin-bottom: var(--spacing-sm);
}
.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}
.about-panel {
    max-width: 850px;
}
.about-panel .btn-link {
    margin-top: var(--spacing-lg);
}
.product-drop {
    width: 100%;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.product-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
}
/*img gallery & floating live badge*/
    .product-gallery{
        position: relative;
        width: 100%;
        background-color: #1a1a1a;
        border-radius: var(--radius-md);
        overflow: hidden;
        display: flex;
        align-items: center;
        justify-content: center;
        aspect-ratio: 1/1;
    }
    .product-image {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
        transition: var(--transition-smooth);
    }
.product-gallery:hover .product-image {
    transform: scale(1.03);
}
    .badge-live {
        position: absolute;
        top: var(--spacing-md);
        left: var(--spacing-md);
        background-color: var(--accent-hype);
        color: #000000;
        font-size: 0.75rem;
        font-weight: 800;
        letter-spacing: 1px;
        padding: 4px 10px;
        border-radius: var(--radius-sm);
        z-index: 10;
}
/*product panel & elements*/
.product-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}
/*header text formatting*/
.brand-tag {
    color: var(--accent-hype);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
}
.product-title {
    font-size: 2.2rem;
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: 0;
}
.product-price {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: var(--radius-md);
}
/*countdown feature*/
.countdown-box {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    padding:  var(--spacing-md);
    border-radius: var(--radius-md);
}
.countdown-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 4px;
}
.timer-display {
    font-family: monospace;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: 2px;
}
/*sizing btn grid layouts*/
.selector-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
}
.size-grid {
    display: grid;
    grid-template-columns: repeat(5,1fr);
    gap: 10px;
}
.size-chip {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
}
.size-chip:hover:not(:disabled) {
    background-color: var(--text-primary);
}
.size-chip.is-selected {
    background-color: var(--text-primary);
    color: #000000;
    border-color: var(--text-primary);
}
.size-chip:disabled {
    opacity: 0.25;
    cursor: not-allowed;
    text-decoration: line-through;
}
/*purchase action styles*/
.action-area {
    margin-top: var(--spacing-md);
}
.btn-primary {
    width: 100%;
    background-color: var(--text-primary);
    color: #000000;
    border: none;
    padding: var(--spacing-md);
    font-weight: 800;
    letter-spacing: 1px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: opacity 0.2 ease;
}
.btn-primary:hover:not(:disabled) {
    opacity: 0.9;
}
.btn-primary:disabled {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: not-allowed;
}
.btn-primary.btn-link {
    width: auto;
    text-transform: uppercase;
}
/*slide-out drawer system mechan.*/
.cart-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 100;
    pointer-events: none;
    display: none;
}
.drawer-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
    opacity: 0;
    transition: opacity 0.3s ease;
}
.drawer-content {
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 440px;
    height: 100%;
    background-color: #181818;
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: var(--transition-smooth);
}
.cart-drawer[aria-hidden="false"] {
    pointer-events: auto;
    display: block;
}
.cart-drawer[aria-hidden="false"] .drawer-overlay {
    opacity: 1;
}
.cart-drawer[aria-hidden="false"] .drawer-content {
    transform: translateX(0);
}
.drawer-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.btn-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
}
.btn-close:hover {
    color: var(--text-primary);
}
.drawer-body {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}
.empty-cart-msg {
    color: var(--text-secondary);
    text-align: center;
    margin-top: 4rem;
    font-size: 0.95rem;
}
.drawer-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-surface);
}
.summary-row {
    display: flex;
    justify-content: space-between;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.5px;
}
@media (min-width: 768px) {
 .product-container {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: calc(var(--spacing-lg) *2);
    }
 .hero-section {
    grid-template-columns: 1fr 0.8fr;
    }
 .hero-title {
    font-size: 5rem;
    }
 .feature-grid {
    grid-template-columns: repeat(3, 1fr);
    }
}
@media (max-width: 640px) {
 .header-container {
    align-items: flex-start;
    }
 .site-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
    justify-content: space-between;
    }
 .cart-trigger {
    margin-left: auto;
    }
}