@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --bg: #f3f4f6;
    --surface: #ffffff;
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --text-main: #111827;
    --text-muted: #6b7280;
    --border: #e5e7eb;
    --danger: #ef4444;
    --success: #10b981;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }
body { background: var(--bg); color: var(--text-main); display: flex; height: 100vh; overflow: hidden; }

/* Buttons & Inputs */
.btn { padding: 10px 18px; border: none; border-radius: 8px; font-weight: 500; cursor: pointer; transition: 0.2s; text-decoration: none; display: inline-block; font-size: 0.9rem; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3); }
.btn-secondary { background: white; border: 1px solid var(--border); color: var(--text-main); }
.btn-secondary:hover { background: var(--bg); }
.btn-danger { background: #fee2e2; color: var(--danger); }

.input-group { margin-bottom: 15px; }
.input-group label { display: block; margin-bottom: 5px; font-size: 0.85rem; font-weight: 500; color: var(--text-muted); }
.input-group input, .input-group select, .input-group textarea { width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 0.95rem; outline: none; transition: 0.2s; }
.input-group input:focus, .input-group select:focus, .input-group textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1); }

/* Layout */
.sidebar { width: 260px; background: var(--surface); border-right: 1px solid var(--border); display: flex; flex-direction: column; }
.sidebar-brand { padding: 25px; border-bottom: 1px solid var(--border); font-weight: 700; font-size: 1.2rem; color: var(--primary); }
.sidebar-nav { padding: 15px 0; display: flex; flex-direction: column; }
.sidebar-nav a { padding: 12px 25px; color: var(--text-muted); text-decoration: none; font-weight: 500; transition: 0.2s; border-left: 3px solid transparent; }
.sidebar-nav a:hover, .sidebar-nav a.active { color: var(--primary); background: #f5f3ff; border-left-color: var(--primary); }

.main-content { flex: 1; padding: 30px 40px; overflow-y: auto; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 30px; }
.topbar h2 { font-size: 1.5rem; font-weight: 600; }
.user-badge { background: white; padding: 8px 16px; border-radius: 20px; border: 1px solid var(--border); font-size: 0.85rem; color: var(--text-muted); }

/* Dashboard Cards */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-bottom: 30px; }
.stat-card { background: var(--surface); padding: 25px; border-radius: 12px; border: 1px solid var(--border); box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.stat-card h3 { font-size: 0.85rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 10px; }
.stat-card p { font-size: 2rem; font-weight: 700; color: var(--text-main); }

/* Data Tables */
.content-card { background: var(--surface); padding: 25px; border-radius: 12px; border: 1px solid var(--border); box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 15px; text-align: left; border-bottom: 1px solid var(--border); }
.data-table th { font-size: 0.8rem; text-transform: uppercase; color: var(--text-muted); background: var(--bg); }
.badge { padding: 4px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
.badge.active { background: #d1fae5; color: #065f46; }
.badge.inactive { background: #fee2e2; color: #991b1b; }

/* Modals */
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(17, 24, 39, 0.6); backdrop-filter: blur(4px); display: none; align-items: center; justify-content: center; z-index: 100; }
.modal-overlay.active { display: flex; }
.modal-content { background: var(--surface); width: 100%; max-width: 600px; padding: 30px; border-radius: 16px; box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1); max-height: 90vh; overflow-y: auto; }
.modal-header { display: flex; justify-content: space-between; margin-bottom: 20px; border-bottom: 1px solid var(--border); padding-bottom: 15px; }
.modal-header h3 { font-size: 1.25rem; }
.close-btn { background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text-muted); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.form-grid.full { grid-template-columns: 1fr; }