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

:root {
    --bg: #f6f8fc;
    --surface: #ffffff;
    --border: #e6ecf3;
    --text: #0f172a;
    --text-muted: #64748b;
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #dbeafe;
    --success: #16a34a;
    --success-light: #f0fdf4;
    --danger: #dc2626;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 8px 24px -8px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 20px 40px -12px rgba(15, 23, 42, 0.15);
    --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 1.25rem; }
.container.narrow { max-width: 820px; }

/* HEADER */
.site-header {
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 100;
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 68px; gap: 1rem;
}
.logo { display: flex; align-items: center; gap: 0.5rem; font-size: 1.25rem; font-weight: 700; }
.logo i { color: var(--primary); font-size: 1.4rem; }
.main-nav { display: flex; gap: 0.25rem; }
.main-nav a {
    padding: 0.5rem 1rem; border-radius: 40px;
    font-weight: 500; font-size: 0.92rem; color: var(--text-muted);
    transition: var(--transition);
}
.main-nav a:hover { background: var(--primary-light); color: var(--primary-dark); }
.main-nav a.active { background: var(--text); color: white; }

.header-actions { display: flex; align-items: center; gap: 0.75rem; }
.lang-switch { display: flex; background: var(--bg); border-radius: 40px; padding: 3px; gap: 2px; }
.lang-btn {
    padding: 0.35rem 0.7rem; border-radius: 40px;
    font-size: 0.75rem; font-weight: 600; color: var(--text-muted);
    transition: var(--transition);
}
.lang-btn.active { background: var(--primary); color: white; }
.lang-btn:hover:not(.active) { background: var(--primary-light); color: var(--primary-dark); }

.menu-toggle { display: none; background: none; border: none; font-size: 1.4rem; color: var(--text); padding: 0.4rem; }

/* HERO */
.hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #2563eb 100%);
    color: white; padding: 4.5rem 0 5rem; position: relative; overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; top: -50%; right: -10%;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(59,130,246,0.4), transparent 70%);
    border-radius: 50%;
}
.hero-inner {
    display: grid; grid-template-columns: 1.4fr 1fr;
    gap: 3rem; align-items: center; position: relative; z-index: 1;
}
.hero-text h1 { font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 800; line-height: 1.15; margin-bottom: 1rem; letter-spacing: -0.02em; }
.gradient-text {
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-text p { font-size: 1.1rem; opacity: 0.9; margin-bottom: 2rem; max-width: 540px; }
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.hero-stats {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem;
    background: rgba(255,255,255,0.08); backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius); padding: 1.75rem;
}
.stat { text-align: center; }
.stat strong { display: block; font-size: 1.75rem; font-weight: 800; color: #60a5fa; }
.stat strong span { font-size: 0.9rem; }
.stat span { font-size: 0.8rem; opacity: 0.8; text-transform: uppercase; letter-spacing: 0.05em; }

/* BUTTONS */
.btn {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.75rem 1.5rem; border-radius: 40px;
    font-weight: 600; font-size: 0.92rem; border: none;
    transition: var(--transition); white-space: nowrap;
}
.btn-primary {
    background: var(--primary); color: white;
    box-shadow: 0 6px 16px -4px rgba(59,130,246,0.4);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-outline { background: transparent; color: white; border: 1.5px solid rgba(255,255,255,0.3); }
.btn-outline:hover { background: rgba(255,255,255,0.1); }
.btn-lg { padding: 0.9rem 1.75rem; font-size: 1rem; }

/* SECTIONS */
.section { padding: 3.5rem 0; }
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 2rem; gap: 1rem; }
.section-head h2 { font-size: 1.75rem; font-weight: 700; letter-spacing: -0.02em; }
.link-more { color: var(--primary); font-weight: 600; font-size: 0.9rem; display: flex; align-items: center; gap: 0.4rem; transition: var(--transition); }
.link-more:hover { gap: 0.6rem; }

.page-header { background: var(--surface); border-bottom: 1px solid var(--border); padding: 2.5rem 0; }
.page-header h1 { font-size: 2.25rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 0.25rem; }
.page-header p { color: var(--text-muted); }

/* PRODUCT GRID */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; }

.product-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 1.5rem;
    transition: var(--transition); display: flex; flex-direction: column;
    position: relative; overflow: hidden;
}
.product-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--primary), #a78bfa);
    transform: scaleX(0); transform-origin: left; transition: transform 0.3s;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.product-card:hover::before { transform: scaleX(1); }

.card-badge { display: flex; gap: 0.4rem; margin-bottom: 0.9rem; flex-wrap: wrap; }
.badge {
    display: inline-flex; align-items: center; gap: 0.3rem;
    font-size: 0.7rem; font-weight: 600; padding: 0.25rem 0.65rem;
    border-radius: 40px; text-transform: uppercase; letter-spacing: 0.03em;
}
.badge-stock { background: var(--success-light); color: var(--success); }
.badge-out { background: #fef2f2; color: var(--danger); }
.badge-icon { background: var(--primary-light); color: var(--primary-dark); }

.card-title {
    font-size: 1.05rem; font-weight: 700; line-height: 1.4; margin-bottom: 0.6rem;
    color: var(--text); display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden; min-height: 2.8em;
}
.card-desc {
    font-size: 0.85rem; color: var(--text-muted); line-height: 1.55; margin-bottom: 1rem;
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
    overflow: hidden; flex: 1;
}
.card-prices {
    display: flex; align-items: baseline; gap: 0.75rem; flex-wrap: wrap;
    margin-bottom: 1rem; padding-bottom: 1rem; border-bottom: 1px dashed var(--border);
}
.price-main { font-size: 1.4rem; font-weight: 800; color: var(--text); letter-spacing: -0.02em; }
.price-alt { font-size: 0.82rem; color: var(--text-muted); font-weight: 500; }

.card-footer-row { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.card-sales { font-size: 0.8rem; color: var(--text-muted); font-weight: 500; }
.card-sales i { color: #f97316; }
.card-cta { font-size: 0.85rem; font-weight: 600; color: var(--primary); display: flex; align-items: center; gap: 0.35rem; transition: var(--transition); }
.product-card:hover .card-cta { gap: 0.55rem; }

/* FILTERS */
.filters-bar {
    display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 1rem 1.25rem; margin-bottom: 2rem;
}
.search-form {
    display: flex; align-items: center; gap: 0.5rem; flex: 1; min-width: 260px;
    background: var(--bg); border-radius: 40px; padding: 0.3rem 0.3rem 0.3rem 1rem;
    border: 1px solid var(--border); transition: var(--transition);
}
.search-form:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
.search-form i { color: var(--text-muted); font-size: 0.9rem; }
.search-form input { flex: 1; border: none; background: none; outline: none; font-size: 0.92rem; padding: 0.4rem 0; font-family: inherit; }
.search-form button {
    background: var(--primary); color: white; border: none;
    padding: 0.55rem 1.1rem; border-radius: 40px;
    font-weight: 600; font-size: 0.85rem; transition: var(--transition);
}
.search-form button:hover { background: var(--primary-dark); }

.sort-options { display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap; }
.sort-options label { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }
.sort-options a { font-size: 0.82rem; padding: 0.4rem 0.8rem; border-radius: 40px; color: var(--text-muted); transition: var(--transition); }
.sort-options a:hover { background: var(--primary-light); color: var(--primary-dark); }
.sort-options a.active { background: var(--primary); color: white; }

/* PAGINATION */
.pagination { display: flex; align-items: center; justify-content: center; gap: 1rem; margin-top: 2.5rem; flex-wrap: wrap; }
.page-btn {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.6rem 1.2rem; border-radius: 40px;
    background: var(--surface); border: 1px solid var(--border);
    font-weight: 600; font-size: 0.88rem; color: var(--text);
    transition: var(--transition);
}
.page-btn:hover { background: var(--primary); color: white; border-color: var(--primary); }
.page-info { font-size: 0.9rem; color: var(--text-muted); font-weight: 500; }

/* PRODUCT DETAIL */
.breadcrumb {
    display: flex; align-items: center; gap: 0.5rem;
    font-size: 0.85rem; color: var(--text-muted);
    padding: 1.25rem 0; flex-wrap: wrap;
}
.breadcrumb a { color: var(--primary); font-weight: 500; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb i { font-size: 0.65rem; opacity: 0.6; }

.product-detail { display: flex; flex-direction: column; gap: 2.5rem; }
.product-detail-main {
    display: grid; grid-template-columns: 280px 1fr; gap: 2.5rem;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 2rem;
}
.product-visual {
    aspect-ratio: 1; border-radius: var(--radius-sm);
    background: linear-gradient(135deg, #dbeafe, #ede9fe);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 1rem; position: relative;
}
.product-visual-icon {
    width: 100px; height: 100px; border-radius: 50%;
    background: rgba(255,255,255,0.7);
    display: flex; align-items: center; justify-content: center;
    font-size: 2.5rem; color: var(--primary);
}
.product-detail-info h1 {
    font-size: 1.85rem; font-weight: 800; letter-spacing: -0.02em;
    line-height: 1.25; margin-bottom: 1rem;
}
.product-stats { display: flex; gap: 1.25rem; flex-wrap: wrap; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1.5rem; }
.product-stats i { color: var(--primary); margin-right: 0.3rem; }

.product-price-box { background: var(--bg); border-radius: var(--radius-sm); padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }
.price-main-big {
    font-size: 2.25rem; font-weight: 800; letter-spacing: -0.02em;
    color: var(--text); line-height: 1; margin-bottom: 0.5rem;
    transition: color 0.2s;
}
.price-main-big small { font-size: 1rem; font-weight: 500; color: #64748b; margin-left: 0.25rem; }
.price-others { display: flex; gap: 1rem; flex-wrap: wrap; font-size: 0.9rem; color: var(--text-muted); font-weight: 500; }

.product-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.product-actions .btn-outline { color: var(--text); border-color: var(--border); }
.product-actions .btn-outline:hover { background: var(--bg); border-color: var(--text-muted); }

.product-description {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 2rem;
}
.product-description h2 {
    font-size: 1.25rem; font-weight: 700; margin-bottom: 1.25rem;
    display: flex; align-items: center; gap: 0.5rem;
}
.product-description h2 i { color: var(--primary); }
.description-content { font-size: 0.95rem; line-height: 1.8; color: var(--text); white-space: pre-wrap; word-wrap: break-word; }

/* OPTION SELECTOR (Digiseller-style) */
.option-group { margin-bottom: 1.25rem; }
.option-label { display: block; font-size: 0.9rem; font-weight: 600; color: #64748b; margin-bottom: 0.6rem; }
.option-label .req { color: #dc2626; margin-left: 2px; }
.option-variants { display: flex; flex-wrap: wrap; gap: 0.55rem; }
.option-variant {
    position: relative; display: inline-flex; align-items: center; gap: 0.45rem;
    padding: 0.7rem 1rem; border: 1.5px solid #e2e8f0; border-radius: 10px;
    background: #fff; cursor: pointer; font-size: 0.88rem; font-weight: 500;
    color: #1e293b; transition: all 0.15s ease; user-select: none; line-height: 1.2;
}
.option-variant:hover { border-color: #3b82f6; background: #f8faff; }
.option-variant input { position: absolute; opacity: 0; pointer-events: none; }
.option-variant.selected {
    border-color: #3b82f6; background: #eff6ff; color: #1e40af;
    box-shadow: 0 0 0 3px rgba(59,130,246,0.12);
}
.option-variant.selected::after { content: '✓'; color: #3b82f6; font-weight: 700; font-size: 0.85rem; margin-left: 0.15rem; }
.option-modify { color: #94a3b8; font-size: 0.78rem; font-weight: 500; }
.option-variant.selected .option-modify { color: #3b82f6; }

.price-updated { animation: pricePulse 0.4s ease; }
@keyframes pricePulse {
    0%   { color: #16a34a; transform: scale(1.02); }
    100% { color: inherit; transform: scale(1); }
}

/* PROSE */
.prose h2 { font-size: 1.5rem; font-weight: 700; margin: 2rem 0 1rem; letter-spacing: -0.01em; }
.prose h2:first-child { margin-top: 0; }
.prose p { margin-bottom: 1rem; color: var(--text-muted); line-height: 1.8; }
.prose ul { padding-left: 1.5rem; margin-bottom: 1rem; }
.prose li { margin-bottom: 0.4rem; color: var(--text-muted); }
.prose li a { color: var(--primary); font-weight: 500; }
.prose li a:hover { text-decoration: underline; }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.25rem; margin: 2rem 0; }
.feature {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 1.5rem; transition: var(--transition);
}
.feature:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.feature i { font-size: 1.75rem; color: var(--primary); margin-bottom: 0.75rem; }
.feature h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem; }
.feature p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

/* CONTACT */
.contact-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.contact-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 2rem; text-align: center;
}
.contact-card i { font-size: 2.25rem; color: var(--primary); margin-bottom: 1rem; }
.contact-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.75rem; }
.contact-card p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 0.5rem; }
.contact-card .btn { margin-top: 1rem; color: var(--text); border-color: var(--border); }
.contact-card .btn:hover { background: var(--bg); }

/* EMPTY STATE */
.empty-state {
    text-align: center; padding: 4rem 2rem;
    background: var(--surface); border: 1px dashed var(--border);
    border-radius: var(--radius);
}
.empty-state i { font-size: 3rem; color: var(--text-muted); opacity: 0.4; margin-bottom: 1rem; }
.empty-state h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 0.5rem; }
.empty-state p { color: var(--text-muted); margin-bottom: 1.5rem; }

/* FOOTER */
.site-footer { background: #0f172a; color: #cbd5e1; margin-top: 4rem; }
.footer-inner {
    display: grid; grid-template-columns: 1.5fr 1fr 1.5fr;
    gap: 2.5rem; padding: 3rem 1.25rem 2rem;
}
.footer-col h4 { font-size: 1rem; font-weight: 700; margin-bottom: 1rem; color: white; display: flex; align-items: center; gap: 0.4rem; }
.footer-col h4 i { color: var(--primary); }
.footer-col p { font-size: 0.88rem; line-height: 1.7; margin-bottom: 0.5rem; }
.footer-col a { display: block; font-size: 0.88rem; padding: 0.3rem 0; color: #cbd5e1; transition: var(--transition); }
.footer-col a:hover { color: white; padding-left: 0.25rem; }
.footer-bottom { border-top: 1px solid #1e293b; padding: 1.25rem 0; font-size: 0.82rem; color: #94a3b8; text-align: center; }

/* RESPONSIVE */
@media (max-width: 900px) {
    .hero-inner { grid-template-columns: 1fr; gap: 2rem; }
    .product-detail-main { grid-template-columns: 1fr; }
    .product-visual { max-width: 220px; margin: 0 auto; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
    .main-nav {
        display: none; position: absolute; top: 68px; left: 0; right: 0;
        background: white; flex-direction: column; padding: 1rem;
        border-bottom: 1px solid var(--border); box-shadow: var(--shadow);
    }
    .main-nav.open { display: flex; }
    .menu-toggle { display: block; }
    .product-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 1.75rem; }
    .section { padding: 2.5rem 0; }
    .filters-bar { flex-direction: column; align-items: stretch; }
    .sort-options { justify-content: center; }
}