:root{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--border-color: #334155;--text-primary: #f8fafc;--text-secondary: #94a3b8;--primary: #1d3557;--secondary: #6c5ce7;--secondary-gradient: linear-gradient(135deg, #6c5ce7, #8e44ad);--accent-green: #10b981;--accent-amber: #f59e0b;--accent-red: #ef4444;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .15), 0 10px 10px -5px rgba(0, 0, 0, .04);--transition-fast: .2s ease;--transition-normal: .3s ease}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);font-family:Inter,sans-serif;line-height:1.5;overflow-x:hidden}.auth-card-wrapper{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:2rem;background:radial-gradient(circle at 10% 20%,rgba(108,92,231,.08) 0%,transparent 40%),radial-gradient(circle at 90% 80%,rgba(29,53,87,.1) 0%,transparent 50%)}.auth-card{width:100%;max-width:400px;background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:20px;padding:2rem 2.5rem;box-shadow:var(--shadow-xl);animation:slideUp .5s cubic-bezier(.16,1,.3,1)}.auth-header{text-align:center;margin-bottom:2rem}.auth-logo-img{max-height:50px;max-width:100%;margin-bottom:1.25rem;object-fit:contain}.auth-header h1{font-family:Outfit,sans-serif;font-size:1.5rem;font-weight:700;color:var(--text-primary);margin-bottom:.5rem}.auth-header p{color:var(--text-secondary);font-size:.85rem}.form-group{margin-bottom:1.25rem;display:flex;flex-direction:column;gap:.35rem}.form-group-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-bottom:1.25rem}.form-group label{font-family:Outfit,sans-serif;font-weight:600;font-size:.8rem;color:var(--text-primary);letter-spacing:.3px}.form-group input,.form-group 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var(--border-color);background-color:transparent;color:var(--text-secondary);font-family:Outfit,sans-serif;font-weight:600;font-size:.9rem;cursor:pointer;transition:var(--transition-fast)}.btn-secondary:hover{color:var(--text-primary);background-color:#ffffff0d}.auth-footer{text-align:center;margin-top:2rem}.auth-footer a{color:var(--text-secondary);text-decoration:none;font-size:.9rem;transition:var(--transition-fast)}.auth-footer a:hover{color:var(--secondary)}.dashboard-wrapper{display:grid;grid-template-columns:280px 1fr;min-height:100vh}.sidebar{background-color:var(--bg-secondary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;padding:2rem 1.5rem;position:sticky;top:0;height:100vh}.sidebar-header{margin-bottom:2rem;padding-left:.5rem;display:flex;flex-direction:column;align-items:flex-start}.sidebar-logo-img{max-height:40px;max-width:100%;object-fit:contain;margin-bottom:.5rem}.sidebar-logo-sub{font-family:Outfit,sans-serif;font-size:.72rem;font-weight:700;color:var(--text-secondary);text-transform:uppercase;letter-spacing:1.5px}.sidebar-nav{display:flex;flex-direction:column;gap:.5rem;flex-grow:1}.nav-tab-btn{display:flex;align-items:center;gap:.75rem;width:100%;padding:.85rem 1rem;background:none;border:none;border-radius:12px;color:var(--text-secondary);font-family:Outfit,sans-serif;font-weight:600;font-size:.95rem;text-align:left;cursor:pointer;transition:var(--transition-fast)}.nav-tab-btn:hover{color:var(--text-primary);background-color:#ffffff08}.nav-tab-btn.active{color:#fff;background:var(--secondary-gradient);box-shadow:0 4px 12px #6c5ce733}.sidebar-footer{border-top:1px solid var(--border-color);padding-top:1.5rem;display:flex;flex-direction:column;gap:1rem}.admin-email-label{font-size:.85rem;color:var(--text-secondary);word-break:break-all;padding-left:.5rem}.btn-logout{width:100%;padding:.65rem;border-radius:8px;border:1px solid rgba(239,68,68,.2);background-color:#ef44440d;color:var(--accent-red);font-family:Outfit,sans-serif;font-weight:600;font-size:.9rem;cursor:pointer;transition:var(--transition-fast)}.btn-logout:hover{background-color:var(--accent-red);color:#fff;box-shadow:0 4px 12px #ef444433}.main-content{padding:2rem 3rem;height:100vh;overflow-y:auto;background-color:var(--bg-primary);display:flex;flex-direction:column}.panel-header{margin-bottom:2rem}.panel-header h2{font-family:Outfit,sans-serif;font-size:1.65rem;font-weight:700;margin-bottom:.25rem}.panel-header p{color:var(--text-secondary);font-size:.9rem}.tab-panel{display:none;animation:fadeIn .4s ease-out}.tab-panel.active{display:block}.stats-overview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-bottom:2.5rem}.stat-card{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:1.75rem 2rem;box-shadow:var(--shadow-sm)}.stat-card h3{font-size:.85rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:.75rem;font-family:Outfit,sans-serif;font-weight:700}.stat-card p{font-size:2.25rem;font-weight:700;color:var(--text-primary)}.chart-container{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:20px;padding:2rem;margin-bottom:2.5rem;box-shadow:var(--shadow-md);height:350px;position:relative}.stats-details-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}.details-card{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:2rem;box-shadow:var(--shadow-sm)}.details-card h3{font-family:Outfit,sans-serif;font-weight:700;font-size:1.15rem;margin-bottom:1.25rem;border-bottom:1px solid var(--border-color);padding-bottom:.75rem}.details-list{list-style:none;display:flex;flex-direction:column;gap:.75rem}.details-list li{display:flex;justify-content:space-between;font-size:.95rem;padding:.5rem .75rem;border-radius:8px;background-color:var(--bg-primary);border:1px solid rgba(255,255,255,.02)}.details-list li span:last-child{font-weight:600;color:var(--secondary)}.table-container{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:20px;overflow:hidden;box-shadow:var(--shadow-md)}.data-table{width:100%;border-collapse:collapse;text-align:left}.data-table th{background-color:#ffffff05;border-bottom:1px solid var(--border-color);padding:.75rem 1.25rem;font-family:Outfit,sans-serif;font-weight:700;font-size:.8rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.data-table td{padding:.75rem 1.25rem;border-bottom:1px solid var(--border-color);font-size:.95rem;color:var(--text-primary);vertical-align:middle}.data-table tr:last-child td{border-bottom:none}.data-table tr:hover td{background-color:#ffffff03}.table-placeholder{text-align:center;color:var(--text-secondary);padding:3rem!important;font-style:italic}.table-badge{display:inline-block;padding:.25rem .6rem;border-radius:20px;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.3px}.badge-new{background-color:#6c5ce726;color:var(--secondary)}.badge-converted{background-color:#10b98126;color:var(--accent-green)}.btn-table-action{background:none;border:1px solid var(--border-color);border-radius:6px;color:var(--text-secondary);padding:.4rem .8rem;font-family:Outfit,sans-serif;font-weight:600;font-size:.85rem;cursor:pointer;transition:var(--transition-fast)}.btn-table-action:hover{border-color:var(--secondary);color:var(--text-primary);background-color:#6c5ce70d}.two-column-layout{display:grid;grid-template-columns:1.2fr 1.8fr;gap:2rem;align-items:start}.form-card,.list-card{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:14px;padding:1.5rem 1.75rem;box-shadow:var(--shadow-md)}.form-card h3,.list-card h3{font-family:Outfit,sans-serif;font-size:1.25rem;font-weight:700;margin-bottom:1.5rem;border-bottom:1px solid var(--border-color);padding-bottom:.75rem}.classes-grid{display:grid;grid-template-columns:1fr;gap:1rem}.class-item-card{background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:12px;padding:1.25rem;display:flex;justify-content:space-between;align-items:center}.class-item-card h4{font-family:Outfit,sans-serif;font-size:1.05rem;font-weight:700;margin-bottom:.25rem}.class-item-card p{font-size:.85rem;color:var(--text-secondary)}.class-item-card .class-meta{text-align:right}.class-item-card .class-meta span{display:block;font-size:1.25rem;font-weight:700;color:var(--secondary)}.class-item-card .class-meta label{font-size:.75rem;color:var(--text-secondary);text-transform:uppercase}.filter-bar{margin-bottom:1.5rem;display:flex;align-items:center;gap:1rem;background-color:var(--bg-primary);padding:.75rem 1.25rem;border-radius:10px;border:1px solid var(--border-color)}.filter-bar label{font-size:.9rem;font-weight:500;color:var(--text-secondary)}.filter-bar select{background-color:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-primary);padding:.4rem .8rem;border-radius:6px;outline:none;cursor:pointer}.students-list-wrapper{display:flex;flex-direction:column;gap:1rem}.student-card-item{background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:12px;padding:1.25rem 1.5rem;display:flex;flex-direction:column;gap:1rem;transition:var(--transition-fast)}.student-card-item:hover{border-color:#ffffff14;box-shadow:var(--shadow-md)}.student-card-header{display:flex;justify-content:space-between;align-items:flex-start;border-bottom:1px dashed var(--border-color);padding-bottom:.75rem}.student-card-header h4{font-family:Outfit,sans-serif;font-size:1.1rem;font-weight:700}.student-card-header p{font-size:.85rem;color:var(--text-secondary)}.payment-badge{display:inline-block;padding:.2rem .5rem;border-radius:4px;font-size:.75rem;font-weight:600;text-transform:uppercase}.payment-paid{background-color:#10b98126;color:var(--accent-green)}.payment-pending{background-color:#f59e0b26;color:var(--accent-amber)}.payment-unpaid{background-color:#ef444426;color:var(--accent-red)}.payment-partial{background-color:#6c5ce726;color:var(--secondary)}.student-card-details{display:grid;grid-template-columns:1.3fr 1fr;gap:.75rem}.student-card-details p{font-size:.85rem;color:var(--text-secondary)}.student-card-details strong{color:var(--text-primary);word-break:break-all}.student-card-actions{display:flex;gap:.75rem;flex-wrap:wrap}.btn-card-action{flex:1;background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;color:var(--text-primary);padding:.5rem 1rem;font-family:Outfit,sans-serif;font-weight:600;font-size:.85rem;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:.4rem;transition:var(--transition-fast)}.btn-card-action:hover{border-color:var(--secondary);background-color:#6c5ce70d}.btn-card-action.btn-delete-student{color:var(--accent-red);border-color:#ef44441a;background-color:#ef444405}.btn-card-action.btn-delete-student:hover{background-color:var(--accent-red);border-color:var(--accent-red);color:#fff}.placeholder-text{text-align:center;color:var(--text-secondary);font-style:italic;padding:2rem 0}.modal-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background-color:#0a0f1ee6;z-index:2000;display:flex;justify-content:center;align-items:center;padding:2rem;animation:fadeIn var(--transition-fast) ease-out}.modal-card{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:24px;width:100%;max-width:600px;max-height:85vh;box-shadow:var(--shadow-xl);display:flex;flex-direction:column;overflow:hidden;animation:slideUp .4s cubic-bezier(.16,1,.3,1)}.modal-header{padding:1.5rem 2rem;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center}.modal-header h3{font-family:Outfit,sans-serif;font-size:1.35rem;font-weight:700}.btn-close-modal{background:none;border:none;color:var(--text-secondary);font-size:2rem;cursor:pointer;transition:var(--transition-fast);line-height:1}.btn-close-modal:hover{color:var(--accent-red)}.modal-body{padding:2rem;overflow-y:auto;display:flex;flex-direction:column;gap:2rem}.modal-form{background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:16px;padding:1.5rem}.modal-creations-list{display:flex;flex-direction:column;gap:1rem}.modal-creations-list h4{font-family:Outfit,sans-serif;font-size:1.1rem;font-weight:700;border-bottom:1px solid var(--border-color);padding-bottom:.5rem}.creation-list-item{display:flex;justify-content:space-between;align-items:center;background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:10px;padding:.75rem 1rem;margin-bottom:.5rem}.creation-item-info h5{font-size:.95rem;font-weight:600;margin-bottom:.15rem}.creation-item-info a{font-size:.8rem;color:var(--secondary);text-decoration:none}.creation-item-info a:hover{text-decoration:underline}.btn-delete-creation{background:none;border:none;color:var(--accent-red);font-size:1.1rem;cursor:pointer;transition:var(--transition-fast);padding:.25rem .5rem;border-radius:4px}.btn-delete-creation:hover{background-color:#ef44441a}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 1024px){.dashboard-wrapper{grid-template-columns:1fr}.sidebar{height:auto;position:static;padding:1.5rem;border-right:none;border-bottom:1px solid var(--border-color)}.sidebar-header{margin-bottom:1.5rem}.sidebar-nav{flex-direction:row;overflow-x:auto;padding-bottom:.5rem}.nav-tab-btn{white-space:nowrap;width:auto}.sidebar-footer{display:none}.main-content{padding:2rem;height:auto;overflow-y:visible}.two-column-layout,.stats-overview-grid,.stats-details-grid{grid-template-columns:1fr}}.admin-footer{margin-top:auto;padding-top:2rem;padding-bottom:1rem;text-align:center;border-top:1px solid var(--border-color)}.admin-footer p{font-size:.8rem;color:var(--text-secondary)}.admin-footer a{color:var(--secondary);text-decoration:none;font-weight:500;transition:var(--transition-fast)}.admin-footer a:hover{text-decoration:underline;color:var(--text-primary)}