:root {
    --color-bg: #f7f7f8;
    --color-text: #1f2328;
    --color-muted: #6b7280;
    --color-border: #d7dae0;
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-error-bg: #fef2f2;
    --color-error-text: #991b1b;
    --color-success-bg: #f0fdf4;
    --color-success-text: #166534;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.5;
}

.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
}

.site-header .brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-text);
    text-decoration: none;
}

.site-header nav a {
    margin-left: 1.25rem;
    color: var(--color-muted);
    text-decoration: none;
    font-size: 0.95rem;
}

.site-header nav a:hover { color: var(--color-primary); }

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.site-footer {
    text-align: center;
    color: var(--color-muted);
    font-size: 0.85rem;
    padding: 2rem 0;
}

h1 { font-size: 1.6rem; margin-top: 0; }
h2 { font-size: 1.2rem; }

.card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1.5rem;
}

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.35rem; font-size: 0.9rem; }
.form-group input,
.form-group select {
    width: 100%;
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 1rem;
}
.form-error { color: var(--color-error-text); font-size: 0.85rem; margin-top: 0.25rem; }

.btn {
    display: inline-block;
    background: var(--color-primary);
    color: #fff;
    border: none;
    padding: 0.6rem 1.1rem;
    border-radius: 6px;
    font-size: 0.95rem;
    cursor: pointer;
    text-decoration: none;
}
.btn:hover { background: var(--color-primary-dark); }
.btn-danger { background: #dc2626; }
.btn-danger:hover { background: #b91c1c; }
.btn-secondary { background: #6b7280; }
.btn-secondary:hover { background: #4b5563; }
.btn-small { padding: 0.35rem 0.7rem; font-size: 0.85rem; }

.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}
.alert-error { background: var(--color-error-bg); color: var(--color-error-text); }
.alert-success { background: var(--color-success-bg); color: var(--color-success-text); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.6rem 0.5rem; border-bottom: 1px solid var(--color-border); font-size: 0.9rem; }
.badge { display: inline-block; padding: 0.15rem 0.5rem; border-radius: 999px; font-size: 0.75rem; background: #e5e7eb; }
.badge-active, .badge-approved { background: var(--color-success-bg); color: var(--color-success-text); }
.badge-inactive, .badge-rejected { background: var(--color-error-bg); color: var(--color-error-text); }
.badge-pending { background: #fffbeb; color: #92400e; }

.actions form { display: inline; }
.text-muted { color: var(--color-muted); }

textarea {
    width: 100%;
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.75rem;
    margin: 1rem 0 1.5rem;
}
.stat-tile {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
}
.stat-tile .stat-value { font-size: 1.6rem; font-weight: 700; }
.stat-tile .stat-label { color: var(--color-muted); font-size: 0.8rem; }

.tabs { margin: 1rem 0; }
.tabs a {
    display: inline-block;
    padding: 0.4rem 0.9rem;
    margin-right: 0.4rem;
    border-radius: 999px;
    text-decoration: none;
    font-size: 0.85rem;
    color: var(--color-muted);
    background: #eef0f3;
}
.tabs a.active { background: var(--color-primary); color: #fff; }

.detail-row { display: flex; padding: 0.5rem 0; border-bottom: 1px solid var(--color-border); }
.detail-row dt { width: 160px; flex-shrink: 0; font-weight: 600; color: var(--color-muted); font-size: 0.85rem; }
.detail-row dd { margin: 0; }