:root {
    --app-bg: #eef2f6;
    --app-ink: #18212f;
    --app-muted: #64748b;
    --app-border: #d8e0ea;
    --app-primary: #0f766e;
    --app-primary-hover: #115e59;
    --app-danger: #b91c1c;
    --app-warning: #b7791f;
}

body {
    background-color: var(--app-bg);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--app-ink);
}

.app-shell {
    background-color: #ffffff;
    border: 1px solid var(--app-border);
    border-radius: 8px;
    padding: 24px;
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

h1, h2, h3, h4 {
    color: var(--app-ink);
    font-weight: 700;
}

.text-muted, .text-secondary {
    color: var(--app-muted) !important;
}

.app-navbar {
    background-color: #18212f;
}

.navbar-brand, .navbar-nav .nav-link {
    font-weight: 600;
}

.navbar-nav .nav-link {
    border-radius: 6px;
    margin-right: 4px;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    background-color: rgba(255, 255, 255, 0.12);
}

.btn-primary {
    background-color: var(--app-primary);
    border: none;
    font-weight: 600;
}

.btn-primary:hover {
    background-color: var(--app-primary-hover);
}

.btn-danger {
    background-color: var(--app-danger);
    border: none;
    font-weight: 600;
}

.btn-warning {
    background-color: var(--app-warning);
    border: none;
    color: #fff;
    font-weight: 600;
}

input[type="text"], input[type="email"], input[type="number"], input[type="date"], input[type="datetime-local"], select {
    border-radius: 6px;
    border: 1px solid var(--app-border);
}

input[type="text"]:focus, input[type="email"]:focus, input[type="number"]:focus, input[type="date"]:focus, input[type="datetime-local"]:focus, select:focus {
    border-color: var(--app-primary);
    box-shadow: 0 0 0 0.2rem rgba(15, 118, 110, 0.18);
}

select {
    cursor: pointer;
}

table {
    width: 100%;
    background-color: #ffffff;
}

th, td {
    vertical-align: middle;
}

th {
    color: var(--app-muted);
    font-weight: 600;
    font-size: 0.9rem;
}

.metric-card {
    border: 1px solid var(--app-border);
    border-radius: 8px;
    padding: 16px;
    background: #f8fafc;
}

.product-row {
    border: 1px solid var(--app-border);
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 12px;
    background: #f8fafc;
}

.product-thumb {
    width: 76px;
    height: 58px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--app-border);
    background: #eef2f6;
}

.public-catalog-body {
    background: #f6f8fb;
}

.public-catalog {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    padding: 32px 0;
}

.catalog-header {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 16px;
    margin-bottom: 24px;
}

.catalog-header h1 {
    margin: 0;
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 18px;
}

.catalog-search {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
    margin-bottom: 22px;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
}

.metric-card strong {
    display: block;
    margin-top: 4px;
    font-size: 1.45rem;
}

@media (max-width: 640px) {
    .catalog-search {
        grid-template-columns: 1fr;
    }
}

.catalog-card {
    background: #fff;
    border: 1px solid var(--app-border);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.07);
}

.catalog-card img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    background: #eef2f6;
}

.catalog-card-body {
    padding: 14px;
}

.catalog-card h2 {
    font-size: 1.05rem;
    margin-bottom: 6px;
}

.catalog-card p {
    color: var(--app-muted);
    min-height: 42px;
    margin-bottom: 10px;
}

.catalog-card strong {
    color: var(--app-primary);
    font-size: 1.1rem;
}

.login-body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: #eef2f6;
}

.login-panel {
    width: min(420px, calc(100% - 32px));
    background: #fff;
    border: 1px solid var(--app-border);
    border-radius: 8px;
    padding: 28px;
    box-shadow: 0 14px 32px rgba(15, 23, 42, 0.12);
}