:root {
    --bg: #f6f7f9;
    --bg-card: #ffffff;
    --fg: #1f2937;
    --fg-muted: #6b7280;
    --border: #e5e7eb;
    --primary: #2563eb;
    --primary-fg: #ffffff;
    --danger: #dc2626;
    --warn: #f59e0b;
    --ok: #16a34a;
    --radius: 8px;
}

* { box-sizing: border-box; }

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

.page {
    display: grid;
    grid-template-columns: 240px 1fr;
    min-height: 100vh;
}

.sidebar {
    background: #1f2937;
    color: #f9fafb;
    padding: 1.5rem 1rem;
}

.brand { padding-bottom: 1.5rem; border-bottom: 1px solid #374151; margin-bottom: 1rem; }
.brand strong { display: block; font-size: 1.2rem; }
.brand small { color: #9ca3af; }

.nav-menu { display: flex; flex-direction: column; gap: 0.25rem; }
.nav-link {
    color: #d1d5db;
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    transition: background 0.15s;
}
.nav-link:hover { background: #374151; }
.nav-link.active { background: var(--primary); color: var(--primary-fg); }

main { display: flex; flex-direction: column; min-width: 0; }
.topbar {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}
.topbar .user { color: var(--fg-muted); }
.topbar .inline { display: inline; }

.content { padding: 1.5rem; }

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

h1 { margin: 0 0 1rem 0; }
h3 { margin: 0 0 0.5rem 0; }

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

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--fg);
    border-radius: var(--radius);
    cursor: pointer;
    text-decoration: none;
    font-size: 0.95rem;
}
.btn:hover { background: #f3f4f6; }
.btn-primary { background: var(--primary); color: var(--primary-fg); border-color: var(--primary); }
.btn-primary:hover { background: #1d4ed8; }
.btn-danger { background: var(--danger); color: white; border-color: var(--danger); }
.btn-link { background: transparent; border: 0; color: var(--primary); padding: 0.25rem; }

label {
    display: block;
    margin-bottom: 1rem;
}
input, textarea, select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font: inherit;
    background: var(--bg-card);
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--primary); outline-offset: -1px; }

.checkbox { display: flex; align-items: center; gap: 0.5rem; }
.checkbox input { width: auto; }

.search-bar { display: flex; gap: 0.5rem; align-items: center; margin-bottom: 1rem; }
.search-bar input { flex: 1; }

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}
.data-table th, .data-table td {
    padding: 0.6rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.data-table th { background: #f9fafb; font-weight: 600; }
.data-table tr:last-child td { border-bottom: 0; }

.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
}
.badge-ok { background: #dcfce7; color: #166534; }
.badge-warn { background: #fef3c7; color: #92400e; }
.badge-off { background: #f3f4f6; color: #4b5563; }

.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}
.alert-error { background: #fee2e2; color: #991b1b; }

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}
.card {
    background: var(--bg-card);
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}
.card .big { font-size: 2rem; margin: 0; font-weight: 600; }

.variants { margin: 1rem 0; padding: 1rem; background: #f9fafb; border-radius: var(--radius); }
.variant-row { display: flex; gap: 0.5rem; align-items: center; margin-bottom: 0.5rem; }
.variant-row input { flex: 1; }

.actions { display: flex; gap: 0.5rem; margin-top: 1.5rem; }

/* Auth page */
.auth-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
}
.auth-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    width: 360px;
}
.auth-card h1 { margin-bottom: 0.25rem; }
.auth-card p.muted { margin-top: 0; margin-bottom: 1.5rem; }
.auth-card .btn-primary { width: 100%; }

.validation-message { color: var(--danger); font-size: 0.85rem; }