/* ==========================================================================
   1. OPTIMIZED HIGH-LUXURY DESIGN SYSTEMS & VARIABLES
   ========================================================================== */
:root {
    --bg-color: #ffffff;
    --text-color: #111111;
    --accent-color: #000000;
    --card-bg: #fdfdfd;
    --border-color: #eeeeee;
    --pill-bg: #f5f5f5;
    --pill-text: #555555;
    --font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --letter-spacing: normal;
}

body.theme-streetwear {
    --bg-color: #0d0d0d; 
    --text-color: #f8f9fa; 
    --accent-color: #ff3333; 
    --card-bg: #161616; 
    --border-color: #222222; 
    --pill-bg: #222222; 
    --pill-text: #aaaaaa;
    --font-heading: 'Impact', 'Arial Black', sans-serif; 
    --font-body: -apple-system, sans-serif; 
    --letter-spacing: 0.5px;
}

body.theme-luxury {
    --bg-color: #fcfbfa; 
    --text-color: #1a1918; 
    --accent-color: #705f3b; 
    --card-bg: #ffffff; 
    --border-color: #f2ede4; 
    --pill-bg: #f5f1e9; 
    --pill-text: #5c5954;
    --font-heading: 'Didot', 'Bodoni MT', Georgia, serif; 
    --font-body: -apple-system, sans-serif; 
    --letter-spacing: 0.2px;
}

body.theme-goth {
    --bg-color: #050505; 
    --text-color: #cccccc; 
    --accent-color: #4a148c; 
    --card-bg: #0d0d0d; 
    --border-color: #1a1520; 
    --pill-bg: #120c19; 
    --pill-text: #8e24aa;
    --font-heading: 'Courier New', Courier, monospace;
    --font-body: 'Courier New', Courier, monospace;
    --letter-spacing: -0.2px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    letter-spacing: var(--letter-spacing);
}

header h1, .timeline-title {
    font-family: var(--font-heading);
}

/* ==========================================================================
   2. APP SCREEN STRUCTURAL & LAYOUT ENGINE
   ========================================================================== */
.app-container {
    width: 100%;
    max-width: 550px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-bottom: 40px;
    box-sizing: border-box;
}

header {
    padding: 24px 16px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    margin: 0 0 6px 0;
    font-size: 26px;
    font-weight: 900;
    text-transform: uppercase;
}

header p {
    margin: 0;
    font-size: 13px;
    opacity: 0.7;
}

#search-input {
    width: 100%;
    padding: 14px 16px;
    background-color: var(--pill-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    box-sizing: border-box;
    outline: none;
    transition: all 0.2s ease;
}

#search-input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(0,0,0,0.05);
}

.timeline-section {
    display: flex;
    flex-direction: column;
    margin-top: 15px;
}

.timeline-title {
    font-size: 13px;
    font-weight: 800;
    padding: 12px 16px;
    background-color: var(--pill-bg);
    color: var(--text-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.featured-badge {
    background-color: var(--accent-color);
    color: #ffffff !important;
    font-size: 9px;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: -apple-system, sans-serif !important;
    font-weight: 700;
    letter-spacing: 0;
}

/* ==========================================================================
   3. HIGH-CONVERSION MASONRY GRID SYSTEM (ANTI-GLITCH FINISHED)
   ========================================================================== */
.product-grid {
    column-count: 2;
    column-gap: 12px;
    padding: 16px;
    width: 100%;
    box-sizing: border-box;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
    break-inside: avoid-column;
    -webkit-column-break-inside: avoid;
    margin-bottom: 12px;
}

.card img {
    width: 100%;
    height: auto;
    object-fit: contain;
    background-color: var(--pill-bg);
    min-height: 150px;
    display: block;
    padding: 0;
    box-sizing: border-box;
}

.card-details {
    padding: 12px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-brand { 
    font-size: 10px; 
    opacity: 0.5; 
    text-transform: uppercase; 
    margin-bottom: 2px; 
    font-weight: 700;
}

.card-title { 
    font-size: 12px; 
    font-weight: 600; 
    line-height: 1.3; 
    height: 32px; 
    overflow: hidden; 
    display: -webkit-box; 
    -webkit-line-clamp: 2; 
    -webkit-box-orient: vertical; 
    margin-bottom: 8px; 
    word-break: break-word;
    color: var(--text-color); 
}

.card-pricing { 
    font-size: 14px; 
    font-weight: 800; 
    display: flex; 
    gap: 6px; 
    margin-bottom: 12px; 
}

.current-price { 
    color: var(--text-color); 
}

.old-price { 
    font-size: 11px; 
    text-decoration: line-through; 
    opacity: 0.3; 
    font-weight: 500; 
}

.cta-btn {
    background-color: var(--accent-color);
    color: #ffffff !important; 
    text-align: center;
    text-decoration: none;
    padding: 10px 4px;
    font-size: 11px;
    font-weight: 800;
    border-radius: 4px;
    text-transform: uppercase;
    transition: opacity 0.2s ease;
    font-family: -apple-system, sans-serif !important;
}

.cta-btn:hover { 
    opacity: 0.9; 
}

.loader { 
    text-align: center; 
    padding: 60px 40px; 
    font-size: 14px; 
    opacity: 0.6; 
    font-weight: 600; 
    color: var(--text-color); 
}

.storefront-footer { 
    padding: 40px 16px 20px 16px; 
    text-align: center; 
    opacity: 0.4; 
    font-size: 11px; 
}

.footer-line { 
    width: 30px; 
    height: 1px; 
    background: var(--text-color); 
    margin: 0 auto 12px auto; 
    opacity: 0.2; 
}

.animate-fade { 
    animation: slideDown 0.22s ease-out; 
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   4. RESPONSIVE EXTENSIONS (TABLET & BROADER VIEWPORTS)
   ========================================================================== */
@media screen and (min-width: 768px) {
    .app-container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }
    header { padding: 48px 16px 24px 16px; text-align: left; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--border-color); }
    #search-input { max-width: 360px; margin-top: 0; }
    .product-grid { column-count: 4; column-gap: 20px; padding: 24px 16px; }
    .card-title { font-size: 14px; height: 36px; }
}

@media screen and (min-width: 1100px) {
    .product-grid { column-count: 5; }
}