:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --danger: #ef4444;
    --success: #10b981;
    --bg: #f3f4f6;
    --card: #ffffff;
    --text: #1f2937;
    --text-light: #6b7280;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', system-ui, sans-serif; }
body { background: var(--bg); color: var(--text); line-height: 1.6; }

.container { max-width: 1200px; margin: 0 auto; padding: 20px; }
.card { background: var(--card); padding: 24px; border-radius: 12px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); margin-bottom: 20px; }

header { background: var(--primary); color: white; padding: 15px 0; margin-bottom: 30px; }
header .container { display: flex; justify-content: space-between; align-items: center; }
header h1 { font-size: 1.5rem; }
header a { color: white; text-decoration: none; font-weight: 500; }

.btn { display: inline-block; padding: 10px 20px; border: none; border-radius: 6px; cursor: pointer; font-size: 1rem; font-weight: 500; text-decoration: none; transition: 0.2s; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: white; }
.btn-success { background: var(--success); color: white; }
.btn-sm { padding: 6px 12px; font-size: 0.875rem; }

.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 5px; font-weight: 500; }
.form-group input, .form-group select { width: 100%; padding: 10px; border: 1px solid #d1d5db; border-radius: 6px; font-size: 1rem; }

table { width: 100%; border-collapse: collapse; margin-top: 15px; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid #e5e7eb; }
th { background: #f9fafb; font-weight: 600; }

.alert { padding: 12px; border-radius: 6px; margin-bottom: 15px; }
.alert-error { background: #fee2e2; color: #991b1b; }
.alert-success { background: #d1fae5; color: #065f46; }

/* Modal for Idle & Screen Share */
.modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 1000; justify-content: center; align-items: center; }
.modal-content { background: white; padding: 30px; border-radius: 12px; text-align: center; max-width: 400px; width: 90%; }
.modal-content h2 { margin-bottom: 15px; }
.modal-content p { margin-bottom: 20px; color: var(--text-light); }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; margin-bottom: 20px; }
.stat-card { background: var(--card); padding: 20px; border-radius: 12px; text-align: center; }
.stat-card h3 { font-size: 2rem; color: var(--primary); }
.stat-card p { color: var(--text-light); }

@media (max-width: 768px) {
    table { font-size: 0.875rem; }
    th, td { padding: 8px; }
    .btn { padding: 8px 16px; font-size: 0.875rem; }
}