:root{--primary: #4f46e5;--primary-dark: #3730a3;--primary-light: #e0e7ff;--success: #16a34a;--success-light: #dcfce7;--warning: #d97706;--warning-light: #fef3c7;--danger: #dc2626;--danger-light: #fee2e2;--info: #2563eb;--info-light: #dbeafe;--bg: #f9fafb;--surface: #ffffff;--surface2: #f3f4f6;--border: #e5e7eb;--border-strong: #d1d5db;--text: #111827;--text-1: #111827;--text-2: #374151;--text-3: #6b7280;--text-4: #9ca3af;--radius-sm: 6px;--radius: 10px;--radius-lg: 16px;--radius-xl: 24px;--shadow-sm: 0 1px 3px rgba(0,0,0,.08);--shadow: 0 2px 8px rgba(0,0,0,.1);--shadow-lg: 0 8px 24px rgba(0,0,0,.14);--top-bar-h: 56px;--bottom-nav-h: 64px;--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{height:100%}body{font-family:var(--font);font-size:15px;line-height:1.5;color:var(--text);background:var(--bg);height:100%;-webkit-font-smoothing:antialiased;overscroll-behavior:none}#root{height:100%;display:flex;flex-direction:column}a{color:inherit;text-decoration:none}button{cursor:pointer;border:none;background:none;font:inherit}input,select,textarea{font:inherit}img{max-width:100%}.full-page-center{display:flex;align-items:center;justify-content:center;height:100%;width:100%}.app-shell{display:flex;flex-direction:column;height:100%;max-width:600px;margin:0 auto;width:100%}.screen-content{flex:1;overflow-y:auto;padding:16px;padding-top:calc(var(--top-bar-h) + var(--safe-top));padding-bottom:calc(var(--bottom-nav-h) + var(--safe-bottom) + 16px);-webkit-overflow-scrolling:touch}.top-bar{position:fixed;top:0;left:50%;transform:translate(-50%);width:100%;max-width:600px;height:calc(var(--top-bar-h) + var(--safe-top));padding-top:var(--safe-top);background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;padding-inline:16px;gap:12px;z-index:100;box-shadow:var(--shadow-sm)}.top-bar__title{font-size:17px;font-weight:600;flex:1}.top-bar__actions{display:flex;gap:8px}.bottom-nav{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:600px;height:calc(var(--bottom-nav-h) + var(--safe-bottom));padding-bottom:var(--safe-bottom);background:var(--surface);border-top:1px solid var(--border);display:flex;align-items:stretch;z-index:100}.nav-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;padding:6px 4px;color:var(--text-3);transition:color .15s;-webkit-tap-highlight-color:transparent}.nav-item.active{color:var(--primary)}.nav-item__icon{font-size:22px;line-height:1}.nav-item__label{font-size:10px;font-weight:500;letter-spacing:.3px}.card{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow-sm);overflow:hidden}.card--padded{padding:16px}.card+.card{margin-top:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;border-radius:var(--radius);font-size:14px;font-weight:500;transition:opacity .15s,box-shadow .15s;-webkit-tap-highlight-color:transparent}.btn:active{opacity:.82}.btn--primary{background:var(--primary);color:#fff}.btn--primary:hover{background:var(--primary-dark)}.btn--outline{background:var(--surface);color:var(--text-2);border:1px solid var(--border-strong)}.btn--outline:hover{background:var(--surface2)}.btn--danger{background:var(--danger);color:#fff}.btn--ghost{background:transparent;color:var(--text-3)}.btn--ghost:hover{background:var(--surface2)}.btn--sm{padding:6px 12px;font-size:13px}.btn--lg{padding:14px 22px;font-size:16px}.btn--full{width:100%}.btn:disabled{opacity:.45;pointer-events:none}.field{display:flex;flex-direction:column;gap:6px}.field__label{font-size:13px;font-weight:500;color:var(--text-2)}.input{width:100%;padding:10px 12px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);font-size:15px;color:var(--text);background:var(--surface);outline:none;transition:border-color .15s,box-shadow .15s}.input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.input--error{border-color:var(--danger)}.field__hint{font-size:12px;color:var(--text-3)}.field__error{font-size:12px;color:var(--danger)}.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:999px;font-size:12px;font-weight:600;white-space:nowrap}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;display:flex;align-items:flex-end;justify-content:center;z-index:200;animation:fadeIn .15s}.modal{background:var(--surface);border-radius:var(--radius-lg) var(--radius-lg) 0 0;width:100%;max-width:600px;max-height:90dvh;overflow-y:auto;padding:24px 20px calc(24px + var(--safe-bottom));animation:slideUp .2s ease-out}.modal__title{font-size:18px;font-weight:700;margin-bottom:20px}.modal__actions{display:flex;gap:10px;margin-top:24px}.modal__actions .btn{flex:1}.toast-wrap{position:fixed;bottom:calc(var(--bottom-nav-h) + var(--safe-bottom) + 12px);left:50%;transform:translate(-50%);z-index:300;pointer-events:none;animation:slideUp .2s ease-out}.toast{display:flex;align-items:center;gap:10px;padding:12px 18px;border-radius:var(--radius);font-size:14px;font-weight:500;color:#fff;box-shadow:var(--shadow-lg);white-space:nowrap;max-width:90vw}.toast--success{background:var(--success)}.toast--error{background:var(--danger)}.toast--info{background:var(--info)}.toast--warning{background:var(--warning)}.spinner{border-radius:50%;border-style:solid;border-color:var(--primary-light);border-top-color:var(--primary);animation:spin .7s linear infinite;flex-shrink:0}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.section-title{font-size:15px;font-weight:600;color:var(--text-2)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:48px 24px;text-align:center;color:var(--text-3)}.empty-state__icon{font-size:48px}.empty-state__title{font-size:16px;font-weight:600;color:var(--text-2)}.empty-state__body{font-size:14px}.auth-page{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100%;padding:32px 24px;background:linear-gradient(160deg,var(--primary-light) 0%,var(--bg) 50%)}.auth-card{background:var(--surface);border-radius:var(--radius-lg);padding:32px 24px;width:100%;max-width:400px;box-shadow:var(--shadow-lg)}.auth-logo{font-size:40px;text-align:center;margin-bottom:8px}.auth-title{font-size:22px;font-weight:700;text-align:center;margin-bottom:4px}.auth-subtitle{font-size:14px;color:var(--text-3);text-align:center;margin-bottom:28px}.auth-toggle{text-align:center;margin-top:20px;font-size:14px;color:var(--text-3)}.auth-toggle span{color:var(--primary);font-weight:500;cursor:pointer}.pupil-tabs{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px}.pupil-tabs::-webkit-scrollbar{display:none}.pupil-tab{padding:6px 14px;border-radius:999px;font-size:13px;font-weight:500;white-space:nowrap;background:var(--surface2);color:var(--text-3);border:1px solid transparent;transition:all .15s}.pupil-tab.active{background:var(--primary-light);color:var(--primary);border-color:var(--primary)}.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px}.stat-card__value{font-size:28px;font-weight:700;line-height:1}.stat-card__label{font-size:12px;color:var(--text-3);margin-top:4px}.score-chip{display:inline-flex;align-items:center;justify-content:center;min-width:48px;padding:4px 10px;border-radius:var(--radius-sm);font-size:13px;font-weight:700}.list-row{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--border)}.list-row:last-child{border-bottom:none}.list-row__body{flex:1;min-width:0}.list-row__title{font-size:14px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.list-row__sub{font-size:12px;color:var(--text-3);margin-top:1px}.fab{position:fixed;bottom:calc(var(--bottom-nav-h) + var(--safe-bottom) + 16px);right:max(16px,calc(50vw - 284px));width:52px;height:52px;border-radius:50%;background:var(--primary);color:#fff;font-size:26px;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);z-index:50;transition:transform .15s}.fab:active{transform:scale(.92)}.divider{height:1px;background:var(--border);margin:12px 0}.settings-row{display:flex;align-items:center;gap:14px;padding:14px 16px;border-bottom:1px solid var(--border);cursor:pointer}.settings-row:last-child{border-bottom:none}.settings-row__icon{font-size:20px;width:28px;text-align:center;color:var(--primary)}.settings-row__body{flex:1}.settings-row__label{font-size:15px;font-weight:500}.settings-row__sub{font-size:12px;color:var(--text-3)}.settings-row__arrow{color:var(--text-4);font-size:16px}.toggle-group{display:flex;background:var(--surface2);border-radius:var(--radius-sm);padding:2px;gap:2px}.toggle-btn{flex:1;padding:6px 12px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;color:var(--text-3);transition:all .15s;text-align:center}.toggle-btn.active{background:var(--surface);color:var(--primary);box-shadow:var(--shadow-sm)}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}@media (min-width: 600px){.top-bar,.bottom-nav{border-left:1px solid var(--border);border-right:1px solid var(--border)}}