:root {
    --bg: #0d1117;
    --bg-elevated: #161b22;
    --border: #262c36;
    --text: #e6edf3;
    --text-dim: #8b949e;
    --primary: #10b981;
    --primary-hover: #059669;
    --danger: #ef4444;
    --radius: 12px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: 'Vazirmatn', sans-serif;
    line-height: 1.7;
}

.mono, .price { font-family: 'JetBrains Mono', monospace; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 16px; }

/* Header */
.site-header {
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    flex-wrap: wrap;
    gap: 10px;
}

.logo { font-weight: 900; font-size: 1.2rem; color: var(--primary); text-decoration: none; }

.main-nav { display: flex; gap: 16px; align-items: center; font-size: 0.95rem; }
.main-nav a { color: var(--text-dim); text-decoration: none; }
.main-nav a:hover { color: var(--text); }

.cart-count {
    background: var(--primary);
    color: #04140d;
    border-radius: 999px;
    padding: 1px 7px;
    font-size: 0.75rem;
}

/* Product grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 18px;
    margin: 24px 0;
}

.product-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    text-decoration: none;
    color: var(--text);
    display: block;
    transition: transform .15s ease, border-color .15s ease;
}

.product-card:hover { transform: translateY(-3px); border-color: var(--primary); }

.product-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; background: #000; }

.product-card-body { padding: 14px; }
.product-card-body h3 { margin: 0 0 6px; font-size: 1rem; }
.product-card-body p { margin: 0 0 10px; font-size: 0.85rem; color: var(--text-dim); }

.price-row { display: flex; justify-content: space-between; align-items: center; }
.price { color: var(--primary); font-weight: 600; }
.price-old { text-decoration: line-through; color: var(--text-dim); font-size: 0.8rem; margin-inline-end: 6px; }

/* Buttons */
.btn {
    display: inline-block;
    background: var(--primary);
    color: #04140d;
    border: none;
    padding: 11px 22px;
    border-radius: 10px;
    font-family: 'Vazirmatn', sans-serif;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.95rem;
}
.btn:hover { background: var(--primary-hover); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-danger { background: var(--danger); color: #fff; }

/* Forms */
input[type="text"], input[type="tel"], input[type="search"] {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 12px 14px;
    border-radius: 10px;
    font-family: 'Vazirmatn', sans-serif;
    width: 100%;
    font-size: 1rem;
}

.form-box {
    max-width: 380px;
    margin: 60px auto;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
}
.form-box h2 { margin-top: 0; }
.form-group { margin-bottom: 16px; }

/* Messages */
.messages { margin: 16px 0; }
.message { padding: 12px 16px; border-radius: 10px; margin-bottom: 8px; font-size: 0.9rem; }
.message-success { background: #052e1e; border: 1px solid var(--primary); }
.message-error { background: #2e0505; border: 1px solid var(--danger); }

/* Product detail */
.product-detail { display: grid; grid-template-columns: 1.2fr 1fr; gap: 28px; margin: 24px 0; }

@media (max-width: 720px) {
    .product-detail { grid-template-columns: 1fr; }
    .header-inner { justify-content: center; text-align: center; }
}

.product-detail img.cover { width: 100%; border-radius: var(--radius); border: 1px solid var(--border); }

.tech-badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.tech-badge {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 4px 12px;
    font-size: 0.8rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-dim);
}
a.tech-badge { text-decoration: none; cursor: pointer; }
a.tech-badge:hover { color: var(--text); border-color: var(--text-dim); }
.tech-badge-active { background: var(--primary); color: #04140d !important; border-color: var(--primary); }

.pagination { display: flex; align-items: center; justify-content: center; gap: 16px; margin: 32px 0; }

.buy-box {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    align-self: start;
    position: sticky;
    top: 90px;
}
.buy-box .price { font-size: 1.6rem; display: block; margin-bottom: 14px; }

/* Tables */
.cart-table, .dash-table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.cart-table td, .cart-table th, .dash-table td, .dash-table th {
    padding: 12px; border-bottom: 1px solid var(--border); text-align: right;
}

.cart-total { text-align: left; font-size: 1.2rem; margin: 20px 0; }

.empty-state { text-align: center; padding: 60px 20px; color: var(--text-dim); }

.site-footer {
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    text-align: center;
    padding: 24px 0;
    margin-top: 40px;
    font-size: 0.85rem;
}