:root {
    --bg: #ffffff;
    --fg: #111418;
    --muted: #6b7280;
    --border: #e5e7eb;
    --accent: #4f46e5;
    --accent-hover: #4338ca;
    --card-bg: #ffffff;
    --shadow: 0 1px 2px rgba(0,0,0,.04), 0 4px 12px rgba(0,0,0,.04);
    --radius: 10px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--fg);
    background: var(--bg);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.25rem;
}

header.site {
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}
header.site .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    padding-bottom: 1rem;
}
header.site .brand {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--fg);
}
header.site .brand:hover { text-decoration: none; }

footer.site {
    border-top: 1px solid var(--border);
    margin-top: 3rem;
    color: var(--muted);
    font-size: .9rem;
}
footer.site .container { padding: 1.5rem 1.25rem; }

/* Catalog grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.25rem;
}
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}
.card a { color: inherit; }
.card .thumb {
    aspect-ratio: 4 / 3;
    background: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.card .thumb img {
    width: 100%; height: 100%; object-fit: cover;
}
.card .thumb .placeholder {
    color: var(--muted);
    font-size: .85rem;
}
.card .body { padding: .85rem 1rem 1rem; }
.card .name {
    font-weight: 600;
    margin: 0 0 .25rem 0;
    font-size: 1rem;
}
.card .price {
    color: var(--accent);
    font-weight: 600;
}

/* Detail page */
.product {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 1rem;
}
.product .photo {
    aspect-ratio: 4 / 3;
    background: #f3f4f6;
    border-radius: var(--radius);
    overflow: hidden;
    display: flex; align-items: center; justify-content: center;
}
.product .photo img { width: 100%; height: 100%; object-fit: cover; }
.product h1 { margin: 0 0 .5rem; font-size: 1.6rem; }
.product .price-lg { font-size: 1.4rem; color: var(--accent); font-weight: 700; }
.product .desc { margin-top: 1rem; white-space: pre-wrap; }

@media (min-width: 720px) {
    .product { grid-template-columns: 1fr 1fr; }
}

/* Admin */
.admin-shell { max-width: 900px; margin: 0 auto; padding: 1.25rem; }
.admin-nav {
    display: flex; gap: 1rem; align-items: center;
    border-bottom: 1px solid var(--border);
    padding-bottom: .75rem; margin-bottom: 1.25rem;
}
.admin-nav .spacer { flex: 1; }
.admin-nav a, .admin-nav button { font-size: .95rem; }

table.admin {
    width: 100%; border-collapse: collapse; font-size: .95rem;
}
table.admin th, table.admin td {
    text-align: left; padding: .6rem .5rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}
table.admin th { font-weight: 600; color: var(--muted); }
table.admin .thumb-sm {
    width: 48px; height: 48px; object-fit: cover; border-radius: 6px;
    background: #f3f4f6;
}

/* Forms */
form.stack { display: grid; gap: .9rem; max-width: 540px; }
label.field { display: grid; gap: .3rem; font-size: .9rem; color: var(--muted); }
label.field input,
label.field textarea {
    font: inherit; color: var(--fg);
    padding: .55rem .65rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #fff;
}
label.field textarea { min-height: 140px; resize: vertical; }
label.field input:focus,
label.field textarea:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
    border-color: transparent;
}

button, .btn {
    font: inherit;
    padding: .55rem 1rem;
    border: 1px solid transparent;
    border-radius: 8px;
    background: var(--accent);
    color: #fff;
    cursor: pointer;
}
button:hover, .btn:hover { background: var(--accent-hover); color: #fff; text-decoration: none; }
button.secondary, .btn.secondary {
    background: #fff;
    color: var(--fg);
    border-color: var(--border);
}
button.secondary:hover, .btn.secondary:hover { background: #f9fafb; color: var(--fg); }
button.danger, .btn.danger { background: #dc2626; }
button.danger:hover, .btn.danger:hover { background: #b91c1c; }

.flash {
    padding: .65rem .85rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: .95rem;
}
.flash.error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.flash.ok    { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }

.muted { color: var(--muted); }