/* =========================================
   1. CSS VARIABLES & THEME
   ========================================= */
:root {
    --bg-color: #e5e5ea;
    --blob-1: #ff2a5f;
    --blob-2: #007aff;
    --blob-3: #ff9500;
    --blob-opacity: 0.7;
    
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: rgba(0, 0, 0, 0.1);
    --glass-highlight: rgba(255, 255, 255, 0.8);
    --glass-caustic: rgba(255, 255, 255, 0.4);
    --reflection-start: rgba(255, 255, 255, 0.6);
    --reflection-end: rgba(255, 255, 255, 0.0);
    --glare-color: rgba(255, 255, 255, 0.5);
    
    --pill-bg: rgba(255, 255, 255, 0.7);
    --pill-shadow: 0 4px 12px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05), inset 0 1px 1px rgba(255,255,255,0.8);
    --icon-color: rgba(0, 0, 0, 0.5);
    --icon-active: rgba(0, 0, 0, 0.95);
    --divider: rgba(0, 0, 0, 0.15);
    
    --card-bg: rgba(255, 255, 255, 0.6);
    --card-border: rgba(255, 255, 255, 0.3);
    --text-primary: rgba(0, 0, 0, 0.9);
    --text-secondary: rgba(0, 0, 0, 0.6);
    --accent-blue: #007aff;
    --accent-glow: rgba(0, 122, 255, 0.2);
}

[data-theme="dark"] {
    --bg-color: #000000;
    --blob-1: #bf5af2;
    --blob-2: #0a84ff;
    --blob-3: #ff375f;
    --blob-opacity: 0.5;
    
    --glass-bg: rgba(30, 30, 35, 0.45);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-shadow: rgba(0, 0, 0, 0.8);
    --glass-highlight: rgba(255, 255, 255, 0.25);
    --glass-caustic: rgba(255, 255, 255, 0.05);
    --reflection-start: rgba(255, 255, 255, 0.15);
    --reflection-end: rgba(255, 255, 255, 0.0);
    --glare-color: rgba(255, 255, 255, 0.15);
    
    --pill-bg: rgba(60, 60, 65, 0.8);
    --pill-shadow: 0 4px 12px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.2), inset 0 1px 1px rgba(255,255,255,0.2);
    --icon-color: rgba(255, 255, 255, 0.5);
    --icon-active: #ffffff;
    --divider: rgba(255, 255, 255, 0.15);
    
    --card-bg: rgba(30, 30, 40, 0.6);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-primary: rgba(255, 255, 255, 0.9);
    --text-secondary: rgba(255, 255, 255, 0.6);
    --accent-blue: #0a84ff;
    --accent-glow: rgba(10, 132, 255, 0.2);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
    background: transparent;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    color: var(--text-primary);
    transition: color 0.5s ease;
    overflow-x: hidden;
}

/* =========================================
   3. BACKGROUND MESH
   ========================================= */
.bg-mesh {
    position: fixed;
    inset: 0;
    z-index: -1;
    background: var(--bg-color);
    transition: background 0.8s ease;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: var(--blob-opacity);
    animation: float 20s infinite alternate cubic-bezier(0.45, 0.05, 0.55, 0.95);
    will-change: transform;
    transition: background 0.8s ease, opacity 0.8s ease;
}

.blob-1 { width: 50vw; height: 50vw; top: -10%; left: -10%; background: var(--blob-1); animation-delay: 0s; }
.blob-2 { width: 45vw; height: 45vw; bottom: -10%; right: -10%; background: var(--blob-2); animation-delay: -5s; }
.blob-3 { width: 35vw; height: 35vw; top: 30%; left: 40%; background: var(--blob-3); animation-delay: -10s; }

@keyframes float {
    0% { transform: translate(0, 0) scale(1) rotate(0deg); }
    33% { transform: translate(5%, 10%) scale(1.05) rotate(5deg); }
    66% { transform: translate(-5%, 5%) scale(0.95) rotate(-5deg); }
    100% { transform: translate(0, -10%) scale(1.1) rotate(0deg); }
}

/* =========================================
   4. LIQUID GLASS NAVIGATION
   ========================================= */
.nav-wrapper {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    max-width: 95vw;
}

.liquid-nav {
    position: relative;
    display: flex;
    align-items: center;
    padding: 8px;
    border-radius: 99px;
    overflow-x: auto;
    background: var(--glass-bg);
    backdrop-filter: blur(50px) saturate(200%);
    -webkit-backdrop-filter: blur(50px) saturate(200%);
    box-shadow: 
        0 40px 80px -20px var(--glass-shadow),
        0 10px 30px -10px var(--glass-shadow),
        inset 0 2px 3px -1px var(--glass-highlight),
        inset 0 -2px 4px -1px var(--glass-caustic),
        inset 0 0 0 1px var(--glass-border);
    transition: all 0.5s ease;
}

.liquid-nav::-webkit-scrollbar { display: none; }
.liquid-nav { -ms-overflow-style: none; scrollbar-width: none; }

.liquid-nav::before {
    content: '';
    position: absolute;
    top: 1px; left: 1px; right: 1px; height: 46%;
    border-radius: 99px 99px 24px 24px / 99px 99px 12px 12px;
    background: linear-gradient(180deg, var(--reflection-start) 0%, var(--reflection-end) 100%);
    pointer-events: none;
    z-index: 6;
    transition: background 0.5s ease;
}

.liquid-glare-container {
    position: absolute;
    inset: 0;
    border-radius: 99px;
    overflow: hidden;
    pointer-events: none;
    z-index: 5;
}

.liquid-glare {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
    background: radial-gradient(circle 90px at var(--x, 50%) var(--y, 50%), var(--glare-color) 0%, transparent 100%);
    mix-blend-mode: overlay;
}

.liquid-nav:hover .liquid-glare { opacity: 1; }

.nav-items {
    position: relative;
    display: flex;
    gap: 4px;
    z-index: 3;
    align-items: center;
    flex-wrap: nowrap;
}

.active-pill {
    position: absolute;
    top: 0;
    height: 44px;
    background: var(--pill-bg);
    border-radius: 99px;
    box-shadow: var(--pill-shadow);
    transition: transform 0.5s cubic-bezier(0.34, 1.2, 0.64, 1), 
                width 0.5s cubic-bezier(0.34, 1.2, 0.64, 1),
                background 0.5s ease, box-shadow 0.5s ease;
    z-index: 1;
    pointer-events: none;
}

.nav-btn {
    position: relative;
    background: transparent;
    border: none;
    padding: 0 20px;
    height: 44px;
    border-radius: 99px;
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    color: var(--icon-color);
    cursor: pointer;
    outline: none;
    z-index: 2;
    white-space: nowrap;
    transition: color 0.3s ease;
}

.btn-content {
    display: flex;
    align-items: center;
    gap: 8px;
    pointer-events: none;
    transition: transform 0.2s cubic-bezier(0.32, 0.72, 0, 1);
}

.nav-btn:active .btn-content { transform: scale(0.92); }
.nav-btn.active { color: var(--icon-active); }

.divider {
    width: 1px;
    height: 24px;
    background: var(--divider);
    margin: 0 4px;
    z-index: 3;
    flex-shrink: 0;
    transition: background 0.5s ease;
}

.theme-btn {
    position: relative;
    background: transparent;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    color: var(--icon-color);
    cursor: pointer;
    outline: none;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: color 0.3s ease;
}

.theme-btn:hover,
.theme-btn:active { color: var(--icon-active); }

.theme-icon-wrapper {
    position: relative;
    width: 20px;
    height: 20px;
    pointer-events: none;
    transition: transform 0.2s cubic-bezier(0.32, 0.72, 0, 1);
}

.theme-btn:active .theme-icon-wrapper { transform: scale(0.8); }

.theme-icon-wrapper svg {
    position: absolute;
    top: 0; left: 0;
    transition: transform 0.5s cubic-bezier(0.34, 1.2, 0.64, 1), opacity 0.4s ease;
    stroke-width: 2.2;
}

.sun { opacity: 1; transform: rotate(0deg) scale(1); }
.moon { opacity: 0; transform: rotate(-90deg) scale(0); }
[data-theme="dark"] .sun { opacity: 0; transform: rotate(90deg) scale(0); }
[data-theme="dark"] .moon { opacity: 1; transform: rotate(0deg) scale(1); }

/* =========================================
   5. HERO SECTION
   ========================================= */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 24px 60px;
    position: relative;
}

.hero-badge {
    display: inline-block;
    padding: 8px 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    box-shadow: var(--glass-shadow);
}

.hero h1 {
    font-size: clamp(2.8rem, 8vw, 5.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 16px;
}

.hero h1 .accent {
    background: linear-gradient(135deg, var(--accent-blue), #60a5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 36px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.btn-primary {
    padding: 14px 40px;
    background: var(--accent-blue);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    box-shadow: 0 4px 20px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 122, 255, 0.4);
    background: #0055cc;
}

.btn-secondary {
    padding: 14px 40px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    color: var(--text-primary);
    box-shadow: var(--glass-shadow);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--glass-shadow);
}

.floating-cards {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    overflow: hidden;
}

.float-card {
    position: absolute;
    padding: 16px 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: floatAnimation 8s ease-in-out infinite;
    pointer-events: none;
}

.float-card span { font-size: 1.6rem; }
.float-1 { top: 15%; right: 5%; animation-delay: 0s; }
.float-2 { top: 25%; left: 5%; animation-delay: 2s; }
.float-3 { bottom: 25%; right: 8%; animation-delay: 4s; }
.float-4 { bottom: 15%; left: 8%; animation-delay: 6s; }

@keyframes floatAnimation {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(3deg); }
}

@media (max-width: 768px) { .float-card { display: none; } }

/* =========================================
   6. SECTIONS COMMON
   ========================================= */
.section {
    padding: 80px 24px;
    max-width: 1280px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-header h2 {
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.accent {
    background: linear-gradient(135deg, var(--accent-blue), #60a5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* =========================================
   7. PRODUCTS
   ========================================= */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 32px;
}

.product-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 24px;
    transition: all 0.4s cubic-bezier(0.34, 1.2, 0.64, 1);
    box-shadow: var(--glass-shadow);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 60px var(--accent-glow);
    border-color: var(--accent-blue);
}

.product-icon {
    width: 100%;
    height: 180px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--accent-glow), var(--glass-bg));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    margin-bottom: 16px;
    transition: transform 0.4s ease;
}

.product-card:hover .product-icon { transform: scale(1.05); }

.product-category {
    font-size: 0.8rem;
    color: var(--accent-blue);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.product-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.product-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 12px;
    flex-grow: 1;
}

.product-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--card-border);
}

.product-price {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-blue);
}

.product-rating {
    color: #f59e0b;
    font-size: 0.9rem;
}

.product-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.btn-buy {
    flex: 1;
    padding: 10px 20px;
    background: var(--accent-blue);
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-buy:hover {
    transform: scale(1.03);
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-fav {
    padding: 10px 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.btn-fav:hover {
    background: var(--accent-glow);
    transform: scale(1.05);
}

/* =========================================
   8. CATEGORIES
   ========================================= */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 24px;
}

.category-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 32px 20px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.34, 1.2, 0.64, 1);
    cursor: pointer;
    box-shadow: var(--glass-shadow);
}

.category-card:hover {
    transform: translateY(-6px) scale(1.05);
    border-color: var(--accent-blue);
    box-shadow: 0 12px 40px var(--accent-glow);
}

.category-icon { font-size: 3rem; margin-bottom: 12px; display: block; }
.category-name { font-size: 1rem; font-weight: 600; color: var(--text-primary); }

/* =========================================
   9. DISCOVERY
   ========================================= */
.discovery-glass {
    padding: 40px;
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: 32px;
    box-shadow: var(--glass-shadow);
    max-width: 1100px;
    margin: 0 auto;
}

.discovery-header { margin-bottom: 28px; }
.discovery-header h3 { font-size: 1.8rem; font-weight: 700; color: var(--text-primary); }
.discovery-header p { color: var(--text-secondary); }

.discovery-controls {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.search-wrap {
    flex: 2;
    min-width: 200px;
    display: flex;
    align-items: center;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 4px;
    border: 1px solid var(--card-border);
    transition: all 0.3s ease;
}

.search-wrap:focus-within {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-wrap input {
    flex: 1;
    padding: 12px 16px;
    border: none;
    background: transparent;
    outline: none;
    font-size: 1rem;
    color: var(--text-primary);
    min-width: 100px;
}

.search-btn {
    padding: 10px 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.filter-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    flex: 1;
}

.filter-group select {
    padding: 12px 20px;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 140px;
}

.filter-group select:focus {
    border-color: var(--accent-blue);
    outline: none;
}

.discovery-results {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.discovery-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 16px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.discovery-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.discovery-card .product-icon {
    height: 100px;
    font-size: 2.5rem;
}

/* =========================================
   10. CTA
   ========================================= */
.cta-section { padding: 60px 24px 100px; }

.cta-glass {
    padding: 60px 40px;
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: 32px;
    box-shadow: var(--glass-shadow);
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.cta-glow {
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.cta-glass h2 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 16px;
    position: relative;
    color: var(--text-primary);
}

.cta-glass p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: 32px;
    position: relative;
}

/* =========================================
   11. FOOTER
   ========================================= */
.footer {
    padding: 60px 24px 30px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
}

.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.footer-brand .logo-text {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
}
.footer-brand p { color: var(--text-secondary); margin-top: 8px; }

.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a,
.footer-social a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}
.footer-links a:hover,
.footer-social a:hover { color: var(--accent-blue); }

.footer-social { display: flex; gap: 16px; font-size: 1.4rem; }

.footer-copy {
    grid-column: 1 / -1;
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .footer-inner { grid-template-columns: 1fr; text-align: center; gap: 24px; }
    .footer-social { justify-content: center; }
}

/* =========================================
   12. RESPONSIVE
   ========================================= */
@media (max-width: 768px) {
    .nav-wrapper { top: 10px; }
    .nav-btn { padding: 0 14px; font-size: 13px; }
    .btn-content svg { width: 16px; height: 16px; }
    .liquid-nav { padding: 6px; }
    .theme-btn { width: 36px; height: 36px; }
    .product-grid { grid-template-columns: 1fr 1fr; }
    .category-grid { grid-template-columns: repeat(3, 1fr); }
    .discovery-controls { flex-direction: column; }
    .filter-group { flex-direction: column; }
    .filter-group select { width: 100%; }
    .hero h1 { font-size: 2.4rem; }
    .discovery-glass { padding: 20px; }
}

@media (max-width: 480px) {
    .product-grid { grid-template-columns: 1fr; }
    .category-grid { grid-template-columns: 1fr 1fr; }
    .cta-glass { padding: 40px 20px; }
    .nav-btn { padding: 0 10px; font-size: 12px; }
    .btn-content { gap: 4px; }
}