:root{--bg-dark:#0f1115;--panel-bg:#1a1d24;--panel-border:#ffffff14;--text-primary:#f8f9fa;--text-secondary:#9ca3af;--accent:#3b82f6;--accent-hover:#2563eb;--radius-sm:8px;--radius-lg:16px}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-dark);color:var(--text-primary);-webkit-font-smoothing:antialiased;font-family:Inter,sans-serif}.loading-screen{justify-content:center;align-items:center;height:100vh;display:flex}.spinner{color:var(--text-secondary);animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.admin-container{height:100vh;display:flex;overflow:hidden}.admin-sidebar{background:var(--panel-bg);border-right:1px solid var(--panel-border);flex-direction:column;width:250px;display:flex}.sidebar-header{border-bottom:1px solid var(--panel-border);padding:1.5rem}.sidebar-header h2{margin-bottom:.5rem;font-size:1.2rem}.badge{text-transform:uppercase;letter-spacing:.5px;background:#ffffff1a;border-radius:12px;padding:2px 8px;font-size:.75rem}.badge.super_admin{color:#60a5fa;background:#3b82f633}.badge.teacher{color:#34d399;background:#10b98133}.admin-nav{flex:1;padding:1rem 0}.admin-nav button{width:100%;color:var(--text-secondary);text-align:left;cursor:pointer;background:0 0;border:none;align-items:center;gap:12px;padding:1rem 1.5rem;font-size:.95rem;transition:all .2s;display:flex}.admin-nav button:hover{color:var(--text-primary);background:#ffffff08}.admin-nav button.active{color:var(--accent);border-right:3px solid var(--accent);background:#3b82f61a}.sidebar-footer{border-top:1px solid var(--panel-border);padding:1rem}.logout-btn{border:1px solid var(--panel-border);width:100%;color:var(--text-secondary);border-radius:var(--radius-sm);cursor:pointer;background:0 0;justify-content:center;align-items:center;gap:8px;padding:.75rem;display:flex}.logout-btn:hover{color:var(--text-primary);background:#ffffff0d}.admin-content{flex:1;padding:2rem;overflow-y:auto}.admin-view{animation:.3s ease-out fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.admin-header{justify-content:space-between;align-items:center;margin-bottom:2rem;display:flex}.btn{border-radius:var(--radius-sm);cursor:pointer;border:none;padding:8px 16px;font-weight:500}.btn-primary{background:var(--text-primary);color:var(--bg-dark)}.btn-small{color:var(--text-primary);background:#ffffff1a;padding:4px 12px;font-size:.85rem}.table-responsive{background:var(--panel-bg);border:1px solid var(--panel-border);border-radius:var(--radius-lg);overflow:hidden}table{border-collapse:collapse;text-align:left;width:100%}th,td{border-bottom:1px solid var(--panel-border);padding:1rem 1.5rem}th{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;background:#0003;font-size:.85rem;font-weight:500}tr:last-child td{border-bottom:none}.status-active{color:#34d399}.status-inactive{color:var(--text-secondary)}.status-confirmed{color:#3b82f6}.status-pending{color:#fbbf24}