:root{--color-accent:#007aff;--color-accent-hover:#0063d1;--color-accent-light:#e8f1ff;--color-danger:#ff3b30;--color-danger-light:#fff0ef;--color-success:#34c759;--color-warning:#ff9500;--color-bg:#f2f2f7;--color-surface:#fff;--color-surface-2:#f9f9fb;--color-border:#e5e5ea;--color-border-strong:#c7c7cc;--color-text-primary:#1c1c1e;--color-text-secondary:#6c6c70;--color-text-tertiary:#aeaeb2;--color-text-on-accent:#fff;--font-family:-apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;--font-size-xs:11px;--font-size-sm:13px;--font-size-base:15px;--font-size-md:17px;--font-size-lg:20px;--font-size-xl:24px;--font-size-2xl:28px;--font-size-3xl:34px;--spacing-1:4px;--spacing-2:8px;--spacing-3:12px;--spacing-4:16px;--spacing-5:20px;--spacing-6:24px;--spacing-8:32px;--spacing-10:40px;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:20px;--radius-full:9999px;--shadow-sm:0 1px 3px #00000014, 0 1px 2px #0000000a;--shadow-md:0 4px 12px #0000001a, 0 2px 4px #0000000f;--shadow-lg:0 8px 24px #0000001f, 0 4px 8px #0000000f;--transition-fast:.15s ease;--transition-base:.2s ease;--transition-slow:.3s ease;--sidebar-width:240px;--topbar-height:60px;--content-max-width:1040px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:var(--font-family);font-size:var(--font-size-base);color:var(--color-text-primary);background:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button,input,select,textarea{font:inherit}.app-layout{height:100vh;display:flex;overflow:hidden}.sidebar{width:var(--sidebar-width);background:var(--color-surface);border-right:1px solid var(--color-border);flex-direction:column;flex-shrink:0;display:flex;overflow-y:auto}.main-content{flex-direction:column;flex:1;display:flex;overflow-y:auto}.topbar{height:var(--topbar-height);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--color-border);padding:0 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var(--spacing-2);cursor:pointer;color:var(--color-text-primary);font-size:var(--font-size-sm);width:calc(100% - var(--spacing-4));text-align:left;transition:background var(--transition-fast), color var(--transition-fast);background:0 0;border:none;font-weight:500;display:flex}.sidebar-nav-item:hover{background:var(--color-bg)}.sidebar-nav-item.active{background:var(--color-accent-light);color:var(--color-accent)}.nav-icon{width:20px;height:20px;color:inherit;flex-shrink:0;justify-content:center;align-items:center;display:flex}.nav-icon svg{display:block}.sidebar-nav-item.active .nav-icon{color:var(--color-accent)}.btn{justify-content:center;align-items:center;gap:var(--spacing-2);padding:var(--spacing-2) var(--spacing-4);border-radius:var(--radius-md);font-size:var(--font-size-sm);font-weight:600;font-family:var(--font-family);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;border:none;outline:none;display:inline-flex}.btn:active{transform:scale(.97)}.btn-primary{background:var(--color-accent);color:var(--color-text-on-accent)}.btn-primary:hover{background:var(--color-accent-hover)}.btn-secondary{background:var(--color-surface-2);color:var(--color-text-primary);border:1px solid var(--color-border)}.btn-secondary:hover{background:var(--color-border)}.btn-danger{background:var(--color-danger-light);color:var(--color-danger)}.btn-danger:hover{background:var(--color-danger);color:#fff}.btn-ghost{color:var(--color-accent);background:0 0}.btn-ghost:hover{background:var(--color-accent-light)}.btn-sm{padding:var(--spacing-1) var(--spacing-3);font-size:var(--font-size-xs)}.btn-lg{padding:var(--spacing-3) var(--spacing-6);font-size:var(--font-size-base)}.btn-full{width:100%}.btn:disabled{opacity:.4;cursor:not-allowed;transform:none}.card{background:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border);box-shadow:var(--shadow-sm);overflow:hidden}.card-header{padding:var(--spacing-4) var(--spacing-5);border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;gap:var(--spacing-3);display:flex}.card-title{font-size:var(--font-size-md);font-weight:700}.form-group{margin-bottom:var(--spacing-4)}.form-label{font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-bottom:var(--spacing-2);font-weight:600;display:block}.form-input,.form-select,.form-textarea{width:100%;padding:var(--spacing-3) var(--spacing-4);border:1.5px solid var(--color-border);border-radius:var(--radius-md);font-size:var(--font-size-base);font-family:var(--font-family);color:var(--color-text-primary);background:var(--color-surface);transition:border-color var(--transition-fast), box-shadow var(--transition-fast);outline:none}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--color-accent);box-shadow:0 0 0 3px #007aff26}.form-textarea{resize:vertical;min-height:80px}.table-wrap{border-radius:var(--radius-lg);border:1px solid var(--color-border);background:var(--color-surface);overflow-x:auto}table{border-collapse:collapse;background:var(--color-surface);width:100%}thead th{padding:var(--spacing-3) var(--spacing-4);text-align:left;font-size:var(--font-size-xs);color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.05em;background:var(--color-surface-2);border-bottom:1px solid var(--color-border);font-weight:600}tbody td{padding:var(--spacing-3) var(--spacing-4);font-size:var(--font-size-sm);border-bottom:1px solid var(--color-border);vertical-align:middle}tbody tr:last-child td{border-bottom:none}tbody tr{transition:background var(--transition-fast)}tbody tr.row-click{cursor:pointer}tbody tr:hover{background:var(--color-surface-2)}.badge{padding:2px var(--spacing-2);border-radius:var(--radius-full);font-size:var(--font-size-xs);align-items:center;font-weight:600;display:inline-flex}.badge-blue{background:var(--color-accent-light);color:var(--color-accent)}.badge-green{color:#1d7d3a;background:#e8f8ed}.badge-red{background:var(--color-danger-light);color:var(--color-danger)}.badge-gray{background:var(--color-bg);color:var(--color-text-secondary)}.badge-orange{color:#c05000;background:#fff3e5}.muted-text{color:var(--color-text-secondary);font-size:var(--font-size-sm);margin-top:2px}.billing-stack{gap:var(--spacing-5);flex-direction:column;display:flex}.billing-tabs{align-items:center;gap:var(--spacing-2);margin-bottom:var(--spacing-5);padding-bottom:var(--spacing-1);display:flex;overflow-x:auto}.billing-tabs button{align-items:center;gap:var(--spacing-2);border:1px solid var(--color-border);background:var(--color-surface);min-height:38px;color:var(--color-text-secondary);border-radius:var(--radius-full);padding:var(--spacing-2) var(--spacing-4);cursor:pointer;white-space:nowrap;display:inline-flex}.billing-tabs button.active{background:var(--color-accent);border-color:var(--color-accent);color:var(--color-text-on-accent)}.billing-stats-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.billing-toolbar{gap:var(--spacing-4);grid-template-columns:minmax(220px,1fr) 180px;align-items:end;display:grid}.billing-row-actions{align-items:center;gap:var(--spacing-2);flex-wrap:wrap;display:flex}.billing-payment-check,.billing-summary-strip,.billing-warning{gap:var(--spacing-3);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface-2);padding:var(--spacing-3) var(--spacing-4);margin-bottom:var(--spacing-4);color:var(--color-text-secondary);flex-wrap:wrap;display:flex}.billing-payment-check strong,.billing-summary-strip strong{color:var(--color-text-primary)}.billing-warning{color:#8a4b00;background:#fff8eb;border-color:#ffe0a3}.billing-action-list{gap:var(--spacing-3);flex-direction:column;display:flex}.billing-action-row{justify-content:space-between;align-items:center;gap:var(--spacing-4);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--spacing-4);background:var(--color-surface);display:flex}.billing-preview-box{margin-top:var(--spacing-4);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--spacing-4);background:var(--color-surface-2)}.billing-preview-box p{margin-top:var(--spacing-2);color:var(--color-text-secondary);line-height:1.6}.billing-timeline{gap:var(--spacing-3);flex-direction:column;display:flex}.billing-timeline-item{justify-content:space-between;align-items:flex-start;gap:var(--spacing-4);padding:var(--spacing-4);border-left:3px solid var(--color-accent);background:var(--color-surface-2);border-radius:var(--radius-md);display:flex}.billing-mobile-list{display:none}.billing-mobile-card{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);padding:var(--spacing-4);gap:var(--spacing-3);flex-direction:column;display:flex}.billing-mobile-card-head,.billing-mobile-money{justify-content:space-between;align-items:center;gap:var(--spacing-3);display:flex}.billing-mobile-money span{color:var(--color-text-secondary);font-size:var(--font-size-sm)}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;opacity:0;pointer-events:none;transition:opacity var(--transition-base);background:#0006;justify-content:center;align-items:flex-end;display:flex;position:fixed;inset:0}.modal-overlay.open{opacity:1;pointer-events:auto}.modal-sheet{background:var(--color-surface);border-radius:var(--radius-xl) var(--radius-xl) 0 0;width:100%;max-width:640px;max-height:90vh;transition:transform var(--transition-slow);padding-bottom:env(safe-area-inset-bottom,20px);overflow-y:auto;transform:translateY(100%)}.modal-overlay.open .modal-sheet{transform:translateY(0)}.modal-handle{background:var(--color-border-strong);border-radius:var(--radius-full);width:36px;height:4px;margin:var(--spacing-3) auto var(--spacing-4)}.modal-header{padding:0 var(--spacing-5) var(--spacing-4);justify-content:space-between;align-items:center;display:flex}.modal-title{font-size:var(--font-size-lg);font-weight:700}.modal-close{border-radius:var(--radius-full);background:var(--color-bg);cursor:pointer;width:32px;height:32px;color:var(--color-text-secondary);transition:background var(--transition-fast);border:none;justify-content:center;align-items:center;display:flex}.modal-close:hover{background:var(--color-border)}.modal-body{padding:0 var(--spacing-5) var(--spacing-6)}.toast-container{top:var(--spacing-5);right:var(--spacing-5);z-index:200;gap:var(--spacing-2);flex-direction:column;display:flex;position:fixed}.toast{align-items:center;gap:var(--spacing-3);padding:var(--spacing-3) var(--spacing-4);background:var(--color-text-primary);color:#fff;border-radius:var(--radius-md);font-size:var(--font-size-sm);box-shadow:var(--shadow-lg);min-width:240px;max-width:360px;font-weight:500;animation:.3s forwards toastIn;display:flex}.toast.success{background:#1d7d3a}.toast.error{background:var(--color-danger)}.toast.warning{background:var(--color-warning)}@keyframes toastIn{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}.skeleton{background:linear-gradient(90deg, var(--color-border) 25%, var(--color-surface-2) 50%, var(--color-border) 75%);border-radius:var(--radius-sm);background-size:200% 100%;animation:1.5s infinite shimmer}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.loading-spinner{border:2px solid var(--color-border);border-top-color:var(--color-accent);border-radius:50%;width:20px;height:20px;animation:.7s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.attendance-btn{padding:var(--spacing-2) var(--spacing-3);border-radius:var(--radius-sm);border:1.5px solid var(--color-border);background:var(--color-surface);font-size:var(--font-size-xs);cursor:pointer;transition:all var(--transition-fast);color:var(--color-text-secondary);font-weight:600}.attendance-btn:hover{border-color:var(--color-accent);color:var(--color-accent)}.attendance-btn.active-present{color:#1d7d3a;background:#e8f8ed;border-color:#34c759}.attendance-btn.active-late{color:#c05000;background:#fff3e5;border-color:#ff9500}.attendance-btn.active-absent{background:var(--color-danger-light);border-color:var(--color-danger);color:var(--color-danger)}.attendance-btn.active-early{background:var(--color-accent-light);border-color:var(--color-accent);color:var(--color-accent)}.empty-state{padding:var(--spacing-10) var(--spacing-6);text-align:center;color:var(--color-text-tertiary);flex-direction:column;justify-content:center;align-items:center;display:flex}.empty-state-icon{margin-bottom:var(--spacing-4);font-size:36px}.empty-state-title{font-size:var(--font-size-md);color:var(--color-text-secondary);margin-bottom:var(--spacing-2);font-weight:600}.empty-state-desc{font-size:var(--font-size-sm);margin-bottom:var(--spacing-5)}.onboarding-wrap{background:var(--color-bg);min-height:100vh;padding:var(--spacing-6);justify-content:center;align-items:center;display:flex}.onboarding-card{background:var(--color-surface);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);width:100%;max-width:560px;padding:var(--spacing-8)}.onboarding-logo{font-size:var(--font-size-2xl);color:var(--color-accent);margin-bottom:var(--spacing-2);font-weight:800}.onboarding-title{font-size:var(--font-size-xl);margin-bottom:var(--spacing-2);font-weight:700}.onboarding-desc{font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-bottom:var(--spacing-6)}.step-indicator{gap:var(--spacing-2);margin-bottom:var(--spacing-6);display:flex}.step-dot{border-radius:var(--radius-full);background:var(--color-border);height:4px;transition:background var(--transition-base);flex:1}.step-dot.active{background:var(--color-accent)}.step-dot.done{background:var(--color-success)}.template-grid{gap:var(--spacing-3);margin-bottom:var(--spacing-6);grid-template-columns:repeat(2,1fr);display:grid}.template-card{border:2px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--spacing-4);cursor:pointer;transition:all var(--transition-fast);background:var(--color-surface);text-align:left}.template-card:hover,.template-card.selected{border-color:var(--color-accent);background:var(--color-accent-light)}.template-icon{margin-bottom:var(--spacing-2);color:var(--color-accent);font-size:24px;font-weight:800}.template-name{font-size:var(--font-size-sm);margin-bottom:2px;font-weight:700}.template-desc{font-size:var(--font-size-xs);color:var(--color-text-secondary);line-height:1.45}.stat-grid{gap:var(--spacing-4);margin-bottom:var(--spacing-6);grid-template-columns:repeat(auto-fit,minmax(140px,1fr));display:grid}.stat-card{background:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border);box-shadow:var(--shadow-sm);padding:var(--spacing-5)}.stat-card-flat{padding:var(--spacing-4);background:var(--color-surface-2);border-radius:var(--radius-md);border:none}.stat-card-flat .stat-value{font-size:28px}.stat-card[data-color=green],.stat-card-flat[data-color=green]{border-left:3px solid var(--color-success)}.stat-card[data-color=orange],.stat-card-flat[data-color=orange]{border-left:3px solid var(--color-warning)}.stat-card[data-color=red],.stat-card-flat[data-color=red]{border-left:3px solid var(--color-danger)}.stat-card[data-color=blue],.stat-card-flat[data-color=blue]{border-left:3px solid var(--color-accent)}.stat-label{font-size:var(--font-size-xs);color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:var(--spacing-2);font-weight:600}.stat-value{font-size:var(--font-size-3xl);color:var(--color-text-primary);font-weight:800;line-height:1}.stat-sub{font-size:var(--font-size-xs);color:var(--color-text-tertiary);margin-top:var(--spacing-1)}.page-header{margin-bottom:var(--spacing-6);justify-content:space-between;align-items:flex-start;gap:var(--spacing-4);display:flex}.page-title{font-size:var(--font-size-2xl);letter-spacing:0;font-weight:800}.page-subtitle{font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-top:var(--spacing-1)}.search-bar{align-items:center;gap:var(--spacing-3);background:var(--color-surface);border:1.5px solid var(--color-border);border-radius:var(--radius-full);padding:var(--spacing-2) var(--spacing-4);transition:border-color var(--transition-fast), box-shadow var(--transition-fast);display:flex}.search-bar:focus-within{border-color:var(--color-accent);box-shadow:0 0 0 3px #007aff1f}.search-bar input{font-size:var(--font-size-sm);font-family:var(--font-family);color:var(--color-text-primary);background:0 0;border:none;outline:none;flex:1}.search-icon{color:var(--color-text-tertiary);justify-content:center;align-items:center;font-size:14px;display:inline-flex}.search-icon svg{display:block}.date-nav{align-items:center;gap:var(--spacing-3);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-full);padding:var(--spacing-1) var(--spacing-2);display:flex}.date-nav button{border-radius:var(--radius-full);cursor:pointer;width:32px;height:32px;color:var(--color-text-secondary);transition:background var(--transition-fast);background:0 0;border:none;justify-content:center;align-items:center;font-size:16px;display:flex}.date-nav button:hover{background:var(--color-bg)}.date-nav .date-label{font-size:var(--font-size-sm);text-align:center;min-width:100px;font-weight:600}.toolbar{gap:var(--spacing-3);margin-bottom:var(--spacing-5);flex-wrap:wrap;align-items:center;display:flex}.stack{gap:var(--spacing-4);display:grid}.grid-2{gap:var(--spacing-4);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.class-grid{gap:var(--spacing-4);grid-template-columns:repeat(auto-fit,minmax(240px,1fr));display:grid}.class-card{cursor:pointer;transition:transform var(--transition-fast), box-shadow var(--transition-fast)}.class-card:hover{box-shadow:var(--shadow-sm);transform:translateY(-1px)}.switch-row{justify-content:space-between;align-items:center;gap:var(--spacing-4);padding:var(--spacing-3) 0;border-bottom:1px solid var(--color-border);display:flex}.switch-row:last-child{border-bottom:none}.status-line{color:var(--color-text-secondary);font-size:var(--font-size-sm)}.inline-actions{gap:var(--spacing-2);flex-wrap:wrap;display:flex}.memo-input{margin-top:var(--spacing-2)}@media (width<=768px){.app-layout{display:block;overflow:auto}.sidebar{display:none}.template-grid,.grid-2{grid-template-columns:1fr}.stat-grid{grid-template-columns:repeat(2,1fr)}.billing-stats-grid,.billing-toolbar{grid-template-columns:1fr}.billing-desktop-table{display:none}.billing-mobile-list{gap:var(--spacing-3);flex-direction:column;display:flex}.billing-action-row{flex-direction:column;align-items:flex-start}.billing-row-actions{width:100%}.billing-row-actions .btn{flex:auto;min-height:36px}.page-header{flex-direction:column}.topbar{padding:0 var(--spacing-4)}.page-content{padding:var(--spacing-4)}}#root{min-height:100vh}.error-text{color:var(--color-danger);font-size:var(--font-size-sm)}.notice-box{background:var(--color-accent-light);color:var(--color-accent);border-radius:var(--radius-md);padding:var(--spacing-3) var(--spacing-4);font-size:var(--font-size-sm)}.warn-box{color:#8a3d00;border-radius:var(--radius-md);padding:var(--spacing-3) var(--spacing-4);font-size:var(--font-size-sm);background:#fff3e5}.app-fallback{justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.form-actions{justify-content:flex-end;gap:var(--spacing-2);margin-top:var(--spacing-4);display:flex}.clickable{cursor:pointer}.muted{color:var(--color-text-secondary)}.small{font-size:var(--font-size-xs)}.page-error{margin-bottom:var(--spacing-4)}@media 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