:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger: #dc2626;
    --ok: #16a34a;
    --bg: #f8fafc;
    --card: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --muted: #64748b;
    --radius: 10px;
}

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

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 16px;
}

/* Header */
header {
    background: var(--card);
    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: 12px 16px;
}
.logo {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text);
}
.logo span { color: var(--primary); }
header nav a {
    margin-left: 16px;
    color: var(--text);
    font-weight: 500;
}
header nav a:hover { color: var(--primary); text-decoration: none; }

header nav a.nav-admin {
    background: var(--primary);
    color: #fff;
    padding: 7px 14px;
    border-radius: 8px;
}
header nav a.nav-admin:hover { background: var(--primary-dark); }

main.container {
    flex: 1;
    padding-top: 24px;
    padding-bottom: 40px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 18px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    background: var(--primary);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn-lg { padding: 14px 26px; font-size: 1.05rem; }
.btn-sm { padding: 6px 12px; font-size: .85rem; }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #b91c1c; }

.paid-cell { white-space: nowrap; }
.paid-cell .badge { display: inline-block; margin-bottom: 4px; }
.btn-icon {
    padding: 3px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--muted);
    line-height: 0;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    transition: color .12s, background .12s, border-color .12s;
}
.btn-icon:hover { color: #fff; background: var(--primary); border-color: var(--primary); }
.btn-icon.icon-primary { color: var(--primary); border-color: var(--primary); }
.btn-icon.icon-primary:hover { color: #fff; background: var(--primary); }
.btn-icon.icon-outline:hover { color: #fff; background: var(--danger); border-color: var(--danger); }

/* Cards / catalog */
.grid-products {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    margin-top: 20px;
}
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    display: block;
    color: var(--text);
    transition: transform .12s, box-shadow .12s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(0,0,0,.08); text-decoration: none; }
.card-img { height: 200px; background: #f1f5f9; }
.card-img img { width: 100%; height: 100%; object-fit: cover; }
.card-img-empty {
    display: flex; align-items: center; justify-content: center;
    color: var(--muted); font-size: .9rem;
}
.card-body { padding: 16px; }
.card-body h3 { margin-bottom: 8px; }
.card-desc { color: var(--muted); font-size: .9rem; margin-bottom: 12px; }
.card-price { color: var(--primary); font-weight: 600; margin-bottom: 4px; }
.stock-info { font-size: .85rem; margin: 2px 0 10px; }
.stock-ok { color: var(--ok); }
.stock-off { color: var(--danger); font-weight: 600; }
.discount-note { color: var(--ok); font-size: .9rem; font-weight: 500; }
.discount-hint { font-size: .85rem; margin-bottom: 10px; line-height: 1.5; }
.disabled { opacity: .6; pointer-events: none; cursor: not-allowed; }
.option-chip { font-size: .85rem; font-weight: 600; color: var(--ok); }
.option-chip.option-off { color: var(--danger); font-weight: 700; text-decoration: line-through; }

/* Single product */
.product-single {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin: 20px 0;
}
.product-single-img img { width: 100%; max-height: 420px; object-fit: contain; border-radius: var(--radius); }
.product-desc { margin: 14px 0; line-height: 1.6; }
.price-line { font-size: 1.15rem; margin: 8px 0 14px; color: var(--primary); }
.row { display: flex; gap: 12px; flex-wrap: wrap; }

.back-link { display: inline-block; margin-bottom: 14px; color: var(--muted); font-weight: 500; }
.back-link:hover { color: var(--primary); }

/* Forms */
.form { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; max-width: 640px; margin-top: 16px; }
.form label { display: block; margin-bottom: 14px; font-weight: 600; }
.form input[type=text], .form input[type=email], .form input[type=password],
.form input[type=number], .form select, .form textarea, .form input[type=file] {
    width: 100%;
    margin-top: 5px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    background: #fff;
    font-weight: 400;
}
.form textarea { resize: vertical; }
.form-section { border-top: 1px solid var(--border); padding-top: 16px; margin-top: 16px; }
.form-section h3 { margin-bottom: 12px; }
.inline-form { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; padding: 16px; }
.inline-form label { margin-bottom: 0; }
.inline { display: inline; }
.checkbox { display: flex !important; align-items: center; gap: 8px; font-weight: 500 !important; }
.checkbox input { width: auto !important; margin: 0; }

.narrow { max-width: 420px; margin: 0 auto; }
.payment-info {
    background: #fee2e2;
    border: 1px solid #fecaca;
    border-radius: var(--radius);
    padding: 16px;
    margin: 16px 0;
    line-height: 1.6;
}
.payment-info h3 { margin-bottom: 8px; color: #991b1b; }

.variant-box {
    border: 1px dashed var(--border);
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 12px;
    background: #fbfdff;
}

/* Flash */
.flash-area { margin-bottom: 18px; }
.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 8px; font-weight: 500; }
.flash-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.flash-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.flash-info { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }

/* Admin */
.admin-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.admin-nav { display: flex; gap: 10px; flex-wrap: wrap; margin: 16px 0 24px; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat {
    background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 18px; text-align: center;
}
.stat strong { display: block; font-size: 2rem; color: var(--primary); }
.stat span { color: var(--muted); font-size: .85rem; }

.table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin: 14px 0; }
.table th, .table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: .92rem; vertical-align: top; }
.table th { background: #f1f5f9; font-weight: 600; }
.table tr:last-child td { border-bottom: none; }
.table-compact { font-size: .85rem; }
.actions { display: flex; gap: 8px; align-items: center; }
.muted { color: var(--muted); font-weight: 400; }
.thumb { width: 48px; height: 48px; object-fit: cover; border-radius: 8px; }
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: .78rem; font-weight: 700; }
.badge-ok { background: #dcfce7; color: #166534; }
.badge-off { background: #e2e8f0; color: #475569; }
.badge-blue { background: #dbeafe; color: #1e40af; }
.badge-cancel { background: #fee2e2; color: #991b1b; }

.status-select {
    margin-top: 4px;
    padding: 4px 6px;
    font-size: .78rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #fff;
    color: var(--text);
    cursor: pointer;
    font-family: inherit;
}

/* Report */
.report-block { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 24px; }
.report-block h2 { margin-bottom: 14px; }
.report-columns { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-bottom: 18px; }
.report-col h3 { margin-bottom: 8px; font-size: .95rem; }
.order-chip { display: inline-block; background: #f1f5f9; border-radius: 6px; padding: 2px 8px; margin: 2px 0; font-size: .8rem; }
.order-chip.chip-paid { background: #dcfce7; border: 1px solid #bbf7d0; }

/* Misc */
.confirmation { text-align: center; max-width: 620px; margin: 0 auto; }
.confirmation h1 { margin-bottom: 12px; }
.big-code { font-size: 1.2rem; margin: 12px 0; }
.big-code strong { color: var(--primary); font-size: 1.5rem; }
.summary-box { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; text-align: left; margin: 18px 0; line-height: 1.9; }
.empty-state { text-align: center; padding: 60px 16px; color: var(--muted); }
.empty-state p { margin: 8px 0; }
.mini-img { margin-bottom: 12px; }
.mini-img img { max-height: 140px; border-radius: 8px; }

.legal-block {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    margin: 16px 0;
    line-height: 1.7;
}
.legal-block h2 { font-size: 1.05rem; margin-bottom: 10px; }
.legal-block ul { padding-left: 22px; margin: 8px 0; }
.legal-block li { margin: 4px 0; }

footer {
    border-top: 1px solid var(--border);
    background: var(--card);
    padding: 18px 0;
    text-align: center;
    color: var(--muted);
    font-size: .85rem;
}

@media (max-width: 680px) {
    .product-single { grid-template-columns: 1fr; }
    .stats { grid-template-columns: 1fr; }
    .header-inner { flex-direction: column; gap: 10px; }
    .form { padding: 16px; }
}