:root {
    --bg: #f0f2f5;
    --card: #fff;
    --primary: #4a6cf7;
    --primary-hover: #3a5ce5;
    --danger: #f44336;
    --danger-hover: #d32f2f;
    --success: #4caf50;
    --warning: #ff9800;
    --text: #1a1a2e;
    --text-muted: #6b7280;
    --border: #e5e7eb;
    --radius: 8px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
}

/* Header */
.header {
    background: var(--primary);
    color: #fff;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.header h1 { font-size: 18px; font-weight: 600; }
.header .stats {
    display: flex;
    gap: 20px;
    margin-left: auto;
    font-size: 13px;
}
.header .stat { display: flex; flex-direction: column; align-items: center; }
.header .stat-val { font-size: 20px; font-weight: 700; }
.header .stat-label { font-size: 11px; opacity: 0.85; }

/* Tabs */
.tabs {
    display: flex;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
}
.tab {
    padding: 12px 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}
.tab:hover { color: var(--primary); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-content { display: none; padding: 20px 24px; }
.tab-content.active { display: block; }

/* Cards */
.card {
    background: var(--card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 16px;
    margin-bottom: 16px;
}
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}
.card-header h2 { font-size: 16px; font-weight: 600; }

/* Buttons */
button, .btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

/* Table */
table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}
th {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: #f9fafb;
}
tr:hover { background: #f9fafb; }

/* Badges */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
}
.badge-active { background: #e8f5e9; color: #2e7d32; }
.badge-resigned { background: #ffebee; color: #c62828; }
.badge-pending { background: #fff3e0; color: #e65100; }
.badge-approved { background: #e8f5e9; color: #2e7d32; }
.badge-rejected { background: #ffebee; color: #c62828; }
.badge-annual { background: #e3f2fd; color: #1565c0; }
.badge-sick { background: #fce4ec; color: #c62828; }
.badge-personal { background: #f3e5f5; color: #6a1b9a; }

/* Forms */
.form-group { margin-bottom: 12px; }
.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 4px;
}
input, select, textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    outline: none;
    transition: border 0.2s;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); }

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1000;
    justify-content: center;
    align-items: flex-start;
    padding-top: 80px;
}
.modal-overlay.show { display: flex; }
.modal {
    background: var(--card);
    border-radius: var(--radius);
    width: 480px;
    max-width: 90vw;
    max-height: 80vh;
    overflow-y: auto;
    padding: 20px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}
.modal h3 { margin-bottom: 16px; font-size: 16px; }
.modal-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    margin-top: 16px;
}

/* Row helpers */
.row { display: flex; gap: 12px; }
.row > * { flex: 1; }

/* Toolbar */
.toolbar {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 12px;
}
.toolbar input, .toolbar select { width: auto; min-width: 160px; }
.toolbar .spacer { flex: 1; }

/* Empty state */
.empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 14px;
}