:root {
    --brand: #2563eb;
    --brand-dark: #1d4ed8;
    --ink: #1f2937;
    --muted: #6b7280;
    --line: #e5e7eb;
    --bg: #f9fafb;
    --danger: #dc2626;
    --ok: #16a34a;
    --warn-bg: #fef3c7;
}

* { box-sizing: border-box; }

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

.site-header {
    background: #fff;
    border-bottom: 1px solid var(--line);
}

.site-header nav {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.brand {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--brand);
    text-decoration: none;
}

.nav-links { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.nav-links a { color: var(--ink); text-decoration: none; font-size: 0.95rem; }
.nav-links a:hover { color: var(--brand); }

.container { max-width: 1080px; margin: 1.5rem auto; padding: 0 1rem; }

.impersonation-banner {
    background: var(--warn-bg);
    border-bottom: 2px solid #f59e0b;
    padding: 0.5rem 1rem;
    text-align: center;
    font-weight: 600;
}

.inline-form { display: inline; }
.link-button {
    background: none; border: none; padding: 0;
    color: var(--brand); cursor: pointer; font-size: 0.95rem;
    text-decoration: underline;
}

.flash {
    background: #dcfce7; border: 1px solid var(--ok);
    padding: 0.6rem 1rem; border-radius: 6px; margin-bottom: 1rem;
}
.flash-error { background: #fee2e2; border-color: var(--danger); }

h1 { font-size: 1.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.15rem; margin: 1.5rem 0 0.5rem; }

.card {
    background: #fff; border: 1px solid var(--line);
    border-radius: 8px; padding: 1.25rem; margin-bottom: 1rem;
}

.card-grid {
    display: grid; gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.auth-card { max-width: 420px; margin: 3rem auto; }

form .field { margin-bottom: 0.9rem; }
label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 0.25rem; }
input[type="text"], input[type="email"], input[type="password"], input[type="number"],
input[type="date"], input[type="time"], input[type="datetime-local"], select, textarea {
    width: 100%; padding: 0.5rem 0.65rem;
    border: 1px solid var(--line); border-radius: 6px;
    font-size: 0.95rem; font-family: inherit;
    background: #fff;
}
textarea { min-height: 100px; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--brand); outline-offset: -1px; }

.btn {
    display: inline-block; padding: 0.5rem 1.1rem;
    background: var(--brand); color: #fff;
    border: none; border-radius: 6px;
    font-size: 0.95rem; font-weight: 600;
    cursor: pointer; text-decoration: none;
}
.btn:hover { background: var(--brand-dark); }
.btn-secondary { background: #fff; color: var(--ink); border: 1px solid var(--line); }
.btn-secondary:hover { background: var(--bg); }
.btn-danger { background: var(--danger); }
.btn-sm { padding: 0.25rem 0.7rem; font-size: 0.85rem; }

table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { text-align: left; padding: 0.55rem 0.75rem; border-bottom: 1px solid var(--line); font-size: 0.92rem; }
th { background: var(--bg); font-weight: 600; }

.muted { color: var(--muted); font-size: 0.88rem; }
.badge {
    display: inline-block; padding: 0.1rem 0.5rem;
    border-radius: 999px; font-size: 0.78rem; font-weight: 600;
    background: var(--line);
}
.badge-ok { background: #dcfce7; color: var(--ok); }
.badge-warn { background: var(--warn-bg); color: #92400e; }
.badge-danger { background: #fee2e2; color: var(--danger); }

.validation-summary-errors { color: var(--danger); margin-bottom: 0.75rem; }
.validation-summary-errors ul { margin: 0; padding-left: 1.2rem; }
.field-validation-error { color: var(--danger); font-size: 0.85rem; }

.slot-grid { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.slot-grid .btn { min-width: 90px; text-align: center; }

.tenant-banner img { width: 100%; max-height: 220px; object-fit: cover; border-radius: 8px; }
.avatar { width: 64px; height: 64px; border-radius: 50%; object-fit: cover; }

.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }