:root {
    --bg: #f5f6f8;
    --card: #ffffff;
    --border: #e3e5e8;
    --text: #202225;
    --muted: #6b7280;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --green: #16a34a;
    --red: #dc2626;
    --orange: #d97706;
    --radius: 10px;
}

* { box-sizing: border-box; }

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

.app {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 220px;
    background: #111827;
    color: #e5e7eb;
    flex-shrink: 0;
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.sidebar .brand {
    font-size: 20px;
    font-weight: 700;
    padding: 0 20px 20px;
    color: #fff;
}

.sidebar nav { display: flex; flex-direction: column; }

.sidebar nav a {
    color: #cbd5e1;
    text-decoration: none;
    padding: 10px 20px;
    font-size: 14px;
}

.sidebar nav a:hover { background: #1f2937; color: #fff; }
.sidebar nav a.active { background: var(--primary); color: #fff; font-weight: 600; }

.sidebar-user {
    margin-top: auto;
    padding: 16px 20px;
    border-top: 1px solid #1f2937;
    font-size: 13px;
}
.sidebar-user-name { color: #fff; font-weight: 600; }
.sidebar-user-role { color: #9ca3af; margin-bottom: 8px; }
.sidebar-user a { color: #93c5fd; text-decoration: none; font-size: 13px; }
.sidebar-user a:hover { text-decoration: underline; }

.content {
    flex: 1;
    padding: 24px 32px;
    max-width: 1200px;
}

.page-header { margin-bottom: 16px; }
.page-header h1 { margin: 0; font-size: 24px; }

.flash {
    background: #dcfce7;
    color: #166534;
    padding: 10px 14px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 14px;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 8px 16px;
    background: var(--primary);
    color: #fff;
    text-decoration: none;
    border-radius: var(--radius);
    font-size: 14px;
    border: none;
    cursor: pointer;
}

.btn:hover { background: var(--primary-dark); }
.btn.secondary { background: #6b7280; }
.btn.secondary:hover { background: #4b5563; }
.btn.danger { background: var(--red); }
.btn.danger:hover { background: #b91c1c; }
.btn.small { padding: 4px 10px; font-size: 12px; }

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
    margin-bottom: 24px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
}

.card .label { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.card .value { font-size: 22px; font-weight: 700; }
.card .value.green { color: var(--green); }
.card .value.red { color: var(--red); }

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

th, td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    text-align: left;
}

th { background: #f9fafb; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #fafafa; }

.pill {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    background: #e5e7eb;
    color: #374151;
}
.pill.thu { background: #dcfce7; color: #166534; }
.pill.chi { background: #fee2e2; color: #991b1b; }

form.form-box {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    max-width: 640px;
}

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; margin-bottom: 4px; color: var(--muted); }
.field input, .field select, .field textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
}
.field-row { display: flex; gap: 12px; }
.field-row .field { flex: 1; }

.actions-row { display: flex; gap: 8px; }

.section-title { margin: 28px 0 10px; font-size: 16px; }

.empty { color: var(--muted); font-style: italic; padding: 20px; text-align: center; }