:root{--bg-color:#fff9e6;--ink:#2b2d42;--primary:#ff6b6b;--primary-shadow:#c92a2a;--secondary:#4dabf7;--secondary-shadow:#228be6;--success:#40c057;--success-shadow:#2b8a3e;--warning:#fab005;--warning-shadow:#e67700;--paper:#fff;--grid-line:#ffd8a8;--text-main:#495057;--text-muted:#868e96}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);background-image:radial-gradient(var(--grid-line) 2px, transparent 2px);color:var(--text-main);background-size:30px 30px;flex-direction:column;align-items:center;min-height:100vh;padding:2rem 1rem;font-family:Nunito,sans-serif;display:flex}.app-container{background:var(--paper);border-radius:32px;width:100%;max-width:500px;padding:2rem;position:relative;box-shadow:0 12px 24px #0000000d,0 0 0 10px #fff9}.app-header{justify-content:space-between;align-items:center;margin-bottom:1rem;display:flex}h1.title{text-align:center;color:var(--primary);text-shadow:3px 3px #ffe066;letter-spacing:2px;flex:1;font-family:ZCOOL KuaiLe,cursive;font-size:2.4rem}.user-info{white-space:nowrap;background:#f8f9fa;border-radius:20px;align-items:center;gap:6px;padding:6px 12px;font-size:14px;font-weight:700;display:flex}.user-avatar{font-size:20px}.user-name{color:var(--text-main);text-overflow:ellipsis;max-width:80px;overflow:hidden}.btn-logout{color:var(--text-muted);cursor:pointer;background:0 0;border:2px solid #dee2e6;border-radius:12px;padding:2px 8px;font-family:Nunito,sans-serif;font-size:12px;font-weight:800;transition:all .2s}.btn-logout:hover{border-color:var(--primary);color:var(--primary)}.training-banner{text-align:center;margin-bottom:1.5rem}.btn-training{background:var(--warning);color:#fff;cursor:pointer;box-shadow:0 6px 0 var(--warning-shadow);letter-spacing:1px;border:none;border-radius:24px;align-items:center;gap:8px;padding:12px 30px;font-family:ZCOOL KuaiLe,cursive;font-size:1.2rem;transition:transform .1s,box-shadow .1s,background .3s;display:inline-flex}.btn-training:active{box-shadow:0 0 0 var(--warning-shadow);transform:translateY(6px)}.btn-training.active{background:var(--success);box-shadow:0 6px 0 var(--success-shadow)}.btn-training.active:active{box-shadow:0 0 0 var(--success-shadow)}.char-picker{flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:1rem;display:flex}.char-btn{width:56px;height:56px;color:var(--text-main);cursor:pointer;background:#f1f3f5;border:none;border-radius:18px;font-family:ZCOOL KuaiLe,cursive;font-size:28px;transition:transform .1s,box-shadow .1s,background .2s;position:relative;box-shadow:0 5px #dee2e6}.char-btn:active{transform:translateY(5px);box-shadow:0 0 #dee2e6}.char-btn.new-char:after{content:"新";background:var(--primary);color:#fff;box-shadow:0 2px 0 var(--primary-shadow);border-radius:12px;padding:3px 6px;font-family:Nunito,sans-serif;font-size:11px;font-weight:800;position:absolute;top:-6px;right:-6px}.char-btn.old-char:after{content:"复习";background:var(--secondary);color:#fff;box-shadow:0 2px 0 var(--secondary-shadow);border-radius:12px;padding:3px 6px;font-family:Nunito,sans-serif;font-size:11px;font-weight:800;position:absolute;top:-6px;right:-8px}.char-btn.selected{background:var(--secondary);color:#fff;box-shadow:0 5px 0 var(--secondary-shadow)}.char-btn.selected:active{box-shadow:0 0 0 var(--secondary-shadow)}.add-char-row{text-align:center;margin-bottom:1.5rem}.btn-add-char{color:var(--text-muted);cursor:pointer;background:#f1f3f5;border:3px dashed #dee2e6;border-radius:18px;padding:8px 20px;font-family:Nunito,sans-serif;font-size:14px;font-weight:800;transition:all .2s}.btn-add-char:hover{border-color:var(--secondary);color:var(--secondary);background:#e7f5ff}.stage-tabs{background:#f8f9fa;border:2px solid #e9ecef;border-radius:24px;gap:8px;margin-bottom:1.5rem;padding:8px;display:flex}.stage-tab{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:16px;flex:1;padding:12px 6px;font-family:Nunito,sans-serif;font-size:15px;font-weight:800;transition:all .3s cubic-bezier(.175,.885,.32,1.275)}.stage-tab.active{color:var(--primary);background:#fff;transform:scale(1.05);box-shadow:0 4px 12px #00000014}.canvas-wrap{background:#fffdf7;border:6px solid #f8f9fa;border-radius:24px;width:280px;height:280px;margin:0 auto 1.5rem;position:relative;overflow:hidden;box-shadow:inset 0 0 20px #00000008,0 8px 16px #0000000f}.grid-svg{pointer-events:none;width:100%;height:100%;position:absolute;inset:0}#hanzi-target{z-index:10;position:absolute;inset:0}.stroke-counter{flex-wrap:wrap;justify-content:center;gap:10px;min-height:20px;margin-bottom:1.5rem;display:flex}.stroke-dot{background:#e9ecef;border-radius:50%;width:18px;height:18px;transition:all .4s cubic-bezier(.175,.885,.32,1.275);display:inline-block;box-shadow:inset 0 2px 4px #0000001a}.stroke-dot.done{background:var(--success);transform:scale(1.15);box-shadow:0 4px 8px #40c0574d}.stroke-dot.active{background:var(--warning);transform:scale(1.3);box-shadow:0 0 0 4px #fab0054d}.controls{flex-wrap:wrap;justify-content:center;gap:14px;margin-bottom:1.5rem;display:flex}.btn{cursor:pointer;color:var(--text-main);background:#f1f3f5;border:none;border-radius:20px;padding:14px 24px;font-family:Nunito,sans-serif;font-size:16px;font-weight:800;transition:transform .1s,box-shadow .1s;box-shadow:0 6px #dee2e6}.btn:active{transform:translateY(6px);box-shadow:0 0 #dee2e6}.btn:disabled{opacity:.5;cursor:not-allowed;transform:translateY(6px);box-shadow:0 0 #dee2e6}.btn-primary{background:var(--secondary);color:#fff;box-shadow:0 6px 0 var(--secondary-shadow)}.btn-primary:active:not(:disabled){box-shadow:0 0 0 var(--secondary-shadow)}.feedback{min-height:60px;color:var(--text-muted);text-align:center;border-radius:20px;justify-content:center;align-items:center;padding:12px 20px;font-size:18px;font-weight:800;transition:all .3s;display:flex}.feedback.success{color:var(--success-shadow);border:2px solid var(--success);background:#ebfbee;animation:.5s cubic-bezier(.175,.885,.32,1.275) popIn}.feedback.error{color:var(--primary-shadow);border:2px solid var(--primary);background:#fff5f5;animation:.4s ease-in-out shake}.complete-banner{text-align:center;border:4px solid var(--success);background:#ebfbee;border-radius:24px;flex-direction:column;align-items:center;gap:12px;margin-bottom:1.5rem;padding:24px;animation:.6s cubic-bezier(.175,.885,.32,1.275) popIn;display:none;position:relative;overflow:hidden;box-shadow:0 8px 24px #40c05726}.complete-banner.show{display:flex}.complete-char{color:var(--success-shadow);text-shadow:4px 4px #40c05733;font-family:ZCOOL KuaiLe,cursive;font-size:90px;line-height:1}.complete-pinyin{color:var(--success-shadow);background:#fff;border:2px solid #40c05733;border-radius:16px;padding:6px 16px;font-family:Nunito,sans-serif;font-size:20px;font-weight:800}.complete-words{gap:14px;margin-top:12px;display:flex}.complete-word{border:3px solid var(--success);color:var(--success-shadow);cursor:pointer;background:#fff;border-radius:16px;padding:10px 20px;font-family:ZCOOL KuaiLe,cursive;font-size:22px;transition:transform .2s,box-shadow .2s;box-shadow:0 5px #40c05733}.complete-word:active{transform:translateY(5px);box-shadow:0 0 #40c05733}.complete-word.speaking{background:var(--warning);border-color:var(--warning-shadow);color:#fff;box-shadow:0 5px 0 var(--warning-shadow)}@keyframes popIn{0%{opacity:0;transform:scale(.7)}60%{opacity:1;transform:scale(1.05)}to{opacity:1;transform:scale(1)}}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-8px)}40%{transform:translate(8px)}60%{transform:translate(-5px)}80%{transform:translate(5px)}}.confetti-layer{pointer-events:none;z-index:1000;width:100vw;height:100vh;position:fixed;top:0;left:0;overflow:hidden}.confetti-piece{width:12px;height:12px;animation:linear forwards confettiFall;position:absolute}@keyframes confettiFall{0%{opacity:1;transform:translateY(-20px)rotate(0)}to{opacity:0;transform:translateY(100vh)rotate(720deg)}}.login-container{justify-content:center;align-items:center;width:100%;min-height:100vh;padding:1rem;display:flex}.login-card{background:var(--paper);border-radius:32px;width:100%;max-width:420px;padding:2.5rem;animation:.6s cubic-bezier(.175,.885,.32,1.275) popIn;box-shadow:0 12px 24px #0000000d,0 0 0 10px #fff9}.login-title{color:var(--primary);text-align:center;text-shadow:3px 3px #ffe066;letter-spacing:2px;margin-bottom:.5rem;font-family:ZCOOL KuaiLe,cursive;font-size:2.8rem}.login-subtitle{text-align:center;color:var(--text-muted);margin-bottom:2rem;font-size:16px;font-weight:700}.login-form{flex-direction:column;gap:1.2rem;display:flex}.avatar-section{margin-bottom:.5rem}.avatar-grid{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:8px;display:flex}.avatar-btn{cursor:pointer;background:#f8f9fa;border:3px solid #e9ecef;border-radius:16px;justify-content:center;align-items:center;width:52px;height:52px;font-size:28px;transition:all .2s cubic-bezier(.175,.885,.32,1.275);display:flex}.avatar-btn:hover{border-color:var(--secondary);transform:scale(1.1)}.avatar-btn.selected{border-color:var(--secondary);background:#e7f5ff;transform:scale(1.1);box-shadow:0 4px 12px #4dabf74d}.form-group{flex-direction:column;gap:6px;display:flex}.form-label{color:var(--text-main);font-size:15px;font-weight:800}.form-input{color:var(--text-main);background:#f8f9fa;border:3px solid #e9ecef;border-radius:16px;outline:none;padding:14px 18px;font-family:Nunito,sans-serif;font-size:16px;font-weight:600;transition:border-color .2s,background .2s}.form-input:focus{border-color:var(--secondary);background:#fff;box-shadow:0 0 0 4px #4dabf726}.form-input::placeholder{color:#ced4da}.login-error{color:var(--primary-shadow);text-align:center;border:2px solid var(--primary);background:#fff5f5;border-radius:14px;padding:10px 16px;font-size:14px;font-weight:700;animation:.4s ease-in-out shake}.login-btn{width:100%;margin-top:.5rem;padding:16px;font-size:18px}.login-toggle{text-align:center;color:var(--text-muted);margin-top:1.5rem;font-size:14px;font-weight:700}.link-btn{color:var(--secondary);cursor:pointer;text-underline-offset:2px;background:0 0;border:none;font-family:Nunito,sans-serif;font-size:14px;font-weight:800;text-decoration:underline}.link-btn:hover{color:var(--secondary-shadow)}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:500;background:#0006;justify-content:center;align-items:center;padding:1rem;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.modal-card{background:var(--paper);border-radius:28px;width:100%;max-width:400px;padding:2rem;animation:.4s cubic-bezier(.175,.885,.32,1.275) popIn;box-shadow:0 20px 60px #00000026}.modal-title{color:var(--primary);text-align:center;margin-bottom:1.5rem;font-family:ZCOOL KuaiLe,cursive;font-size:1.6rem}.modal-input{width:100%;color:var(--text-main);background:#f8f9fa;border:3px solid #e9ecef;border-radius:14px;outline:none;margin-bottom:1rem;padding:12px 16px;font-family:Nunito,sans-serif;font-size:16px;font-weight:600;transition:border-color .2s,background .2s}.modal-input:focus{border-color:var(--secondary);background:#fff;box-shadow:0 0 0 4px #4dabf726}.modal-input.char-input{text-align:center;padding:16px;font-family:ZCOOL KuaiLe,cursive;font-size:36px}.modal-actions{gap:12px;margin-top:.5rem;display:flex}.modal-actions .btn{flex:1}.modal-error{color:var(--primary-shadow);text-align:center;border:2px solid var(--primary);background:#fff5f5;border-radius:12px;margin-bottom:1rem;padding:8px 12px;font-size:13px;font-weight:700}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@media (max-width:520px){body{padding:1rem .5rem}.app-container{border-radius:24px;padding:1.5rem 1rem}h1.title{font-size:2rem}.app-header{flex-direction:column;gap:8px}.char-btn{width:48px;height:48px;font-size:24px}.canvas-wrap{width:260px;height:260px}.btn{padding:12px 18px;font-size:14px}.login-card{padding:1.5rem}.login-title{font-size:2.2rem}}.admin-container{width:100%;max-width:1200px;margin:0 auto;padding:0 1rem 3rem;animation:.4s adminFadeIn}@keyframes adminFadeIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.admin-header{justify-content:space-between;align-items:center;gap:1rem;padding:1rem 0 1.5rem;display:flex}.admin-header-left,.admin-header-right{flex:none}.admin-title{color:var(--primary);text-shadow:2px 2px #ffe066;letter-spacing:2px;text-align:center;flex:1;font-family:ZCOOL KuaiLe,cursive;font-size:2rem}.admin-back-link{color:var(--text-muted);white-space:nowrap;align-items:center;gap:4px;font-family:Nunito,sans-serif;font-size:14px;font-weight:700;text-decoration:none;transition:color .2s;display:inline-flex}.admin-back-link:hover{color:var(--secondary)}.admin-nav{gap:.5rem;display:flex}.admin-stats{grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:2rem;display:grid}.admin-stat-card{-webkit-backdrop-filter:blur(16px);text-align:center;background:#ffffffa6;border:1px solid #ffffff80;border-radius:20px;padding:1.4rem 1.2rem;transition:transform .25s cubic-bezier(.175,.885,.32,1.275),box-shadow .25s;position:relative;overflow:hidden}.admin-stat-card:before{content:"";border-radius:20px 20px 0 0;height:4px;position:absolute;top:0;left:0;right:0}.admin-stat-card:hover{transform:translateY(-4px);box-shadow:0 12px 32px #00000014}.admin-stat-blue{box-shadow:0 6px 20px #4dabf71f}.admin-stat-blue:before{background:linear-gradient(135deg,#4dabf7,#228be6)}.admin-stat-red{box-shadow:0 6px 20px #ff6b6b1f}.admin-stat-red:before{background:linear-gradient(135deg,#ff6b6b,#c92a2a)}.admin-stat-green{box-shadow:0 6px 20px #40c0571f}.admin-stat-green:before{background:linear-gradient(135deg,#40c057,#2b8a3e)}.admin-stat-orange{box-shadow:0 6px 20px #fab0051f}.admin-stat-orange:before{background:linear-gradient(135deg,#fab005,#e67700)}.admin-stat-icon{margin-bottom:.4rem;font-size:2rem;line-height:1}.admin-stat-value{color:var(--ink);font-family:Nunito,sans-serif;font-size:2.2rem;font-weight:900;line-height:1.1}.admin-stat-label{color:var(--text-muted);letter-spacing:.3px;margin-top:4px;font-size:13px;font-weight:700}.admin-tabs{-webkit-backdrop-filter:blur(12px);background:#fff9;border:2px solid #ffffff80;border-radius:20px;gap:6px;margin-bottom:1.5rem;padding:6px;display:flex}.admin-tab{color:var(--text-muted);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-radius:14px;flex:1;justify-content:center;align-items:center;gap:6px;padding:12px 16px;font-family:Nunito,sans-serif;font-size:15px;font-weight:800;transition:all .3s cubic-bezier(.175,.885,.32,1.275);display:flex}.admin-tab:hover{color:var(--text-main);background:#ffffff80}.admin-tab.active{color:var(--primary);background:#fff;transform:scale(1.02);box-shadow:0 4px 16px #0000000f}.admin-tab-icon{font-size:1.1rem}.admin-tab-label{font-size:inherit}.admin-panel{-webkit-backdrop-filter:blur(16px);background:#ffffffb3;border:1px solid #ffffff80;border-radius:24px;min-height:400px;padding:1.5rem;box-shadow:0 8px 32px #0000000a}.admin-panel-content{animation:.3s adminFadeIn}.admin-panel-header{border-bottom:2px solid #0000000a;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;display:flex}.admin-panel-title{color:var(--ink);font-family:Nunito,sans-serif;font-size:1.3rem;font-weight:900}.admin-panel-count{color:var(--text-muted);background:#f1f3f5;border-radius:20px;padding:4px 14px;font-size:14px;font-weight:700}.admin-table-wrap{border:2px solid #f1f3f5;border-radius:16px;overflow-x:auto}.admin-table{border-collapse:collapse;width:100%;font-size:14px}.admin-table th{text-align:left;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;white-space:nowrap;background:#f8f9fa;border-bottom:2px solid #e9ecef;padding:12px 16px;font-size:13px;font-weight:800}.admin-table td{vertical-align:middle;border-bottom:1px solid #f1f3f5;padding:12px 16px}.admin-table tbody tr{transition:background .15s}.admin-table tbody tr:nth-child(2n){background:#f8f9fa80}.admin-table tbody tr:hover{background:#4dabf70f}.admin-table tbody tr:last-child td{border-bottom:none}.admin-char-display{color:var(--ink);font-family:ZCOOL KuaiLe,cursive;font-size:2rem;line-height:1;display:inline-block}.admin-char-display.admin-char-small{font-size:1.5rem}.admin-user-cell{align-items:center;gap:8px;display:flex}.admin-user-avatar{font-size:1.5rem;line-height:1}.admin-user-name{color:var(--text-main);white-space:nowrap;font-weight:700}.admin-mastery{align-items:center;gap:8px;min-width:100px;display:flex}.admin-mastery-bar{background:#e9ecef;border-radius:4px;flex:1;height:8px;overflow:hidden}.admin-mastery-fill{background:linear-gradient(135deg, var(--success), #69db7c);border-radius:4px;height:100%;transition:width .5s cubic-bezier(.175,.885,.32,1.275)}.admin-mastery-text{color:var(--text-muted);white-space:nowrap;font-size:12px;font-weight:700}.admin-words-list{flex-wrap:wrap;gap:4px;display:flex}.admin-badge{white-space:nowrap;border-radius:10px;align-items:center;padding:3px 10px;font-family:Nunito,sans-serif;font-size:12px;font-weight:700;display:inline-flex}.admin-badge-info{color:var(--secondary-shadow);background:#e7f5ff}.admin-badge-success{color:var(--success-shadow);background:#ebfbee}.admin-badge-warn{color:var(--warning-shadow);background:#fff9db}.admin-badge-danger{color:var(--primary-shadow);background:#fff5f5}.admin-btn{cursor:pointer;color:var(--text-main);white-space:nowrap;background:#f1f3f5;border:none;border-radius:14px;justify-content:center;align-items:center;gap:6px;padding:10px 20px;font-family:Nunito,sans-serif;font-size:14px;font-weight:800;transition:all .2s cubic-bezier(.175,.885,.32,1.275);display:inline-flex}.admin-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px #00000014}.admin-btn:active{box-shadow:none;transform:translateY(1px)}.admin-btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}.admin-btn-primary{background:linear-gradient(135deg, var(--secondary), var(--secondary-shadow));color:#fff;box-shadow:0 4px 12px #4dabf74d}.admin-btn-primary:hover{box-shadow:0 6px 20px #4dabf766}.admin-btn-danger{background:linear-gradient(135deg, var(--primary), var(--primary-shadow));color:#fff;box-shadow:0 4px 12px #ff6b6b4d}.admin-btn-danger:hover{box-shadow:0 6px 20px #ff6b6b66}.admin-btn-success{background:linear-gradient(135deg, var(--success), var(--success-shadow));color:#fff;box-shadow:0 4px 12px #40c0574d}.admin-btn-success:hover{box-shadow:0 6px 20px #40c05766}.admin-btn-ghost{color:var(--text-muted);box-shadow:none;background:0 0}.admin-btn-ghost:hover{color:var(--text-main);box-shadow:none;background:#f1f3f5}.admin-btn-small{border-radius:10px;padding:6px 14px;font-size:13px}.admin-action-btns{gap:4px;display:flex}.admin-form{background:#f8f9fa;border:2px solid #e9ecef;border-radius:18px;margin-bottom:1.5rem;padding:1.5rem;animation:.3s adminSlideDown}@keyframes adminSlideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.admin-form-title{color:var(--ink);margin-bottom:1rem;font-family:Nunito,sans-serif;font-size:1.1rem;font-weight:900}.admin-form-error{color:var(--primary-shadow);border:2px solid var(--primary);background:#fff5f5;border-radius:10px;margin-bottom:1rem;padding:8px 14px;font-size:13px;font-weight:700;animation:.4s ease-in-out shake}.admin-form-row{grid-template-columns:100px 1fr 1fr;gap:12px;margin-bottom:12px;display:grid}.admin-form-group{flex-direction:column;gap:4px;margin-bottom:8px;display:flex}.admin-form-group-wide{grid-column:span 1}.admin-form-label{color:var(--text-muted);font-size:13px;font-weight:800}.admin-form-input{width:100%;color:var(--text-main);background:#fff;border:2px solid #dee2e6;border-radius:12px;outline:none;padding:10px 14px;font-family:Nunito,sans-serif;font-size:14px;font-weight:600;transition:border-color .2s,box-shadow .2s}.admin-form-input:focus{border-color:var(--secondary);box-shadow:0 0 0 3px #4dabf726}.admin-form-input::placeholder{color:#ced4da}.admin-form-input:disabled{color:var(--text-muted);cursor:not-allowed;background:#e9ecef}.admin-form-char-input{text-align:center;padding:8px;font-family:ZCOOL KuaiLe,cursive;font-size:2rem}.admin-form-actions{justify-content:flex-end;gap:10px;margin-top:.5rem;display:flex}.admin-toast{z-index:9999;color:#fff;pointer-events:auto;border-radius:16px;align-items:center;gap:8px;padding:14px 22px;font-family:Nunito,sans-serif;font-size:14px;font-weight:700;animation:.4s cubic-bezier(.175,.885,.32,1.275) adminToastIn;display:flex;position:fixed;top:24px;right:24px;box-shadow:0 8px 32px #00000026}.admin-toast.success{background:linear-gradient(135deg, var(--success), var(--success-shadow))}.admin-toast.error{background:linear-gradient(135deg, var(--primary), var(--primary-shadow))}.admin-toast-icon{font-size:1.1rem}@keyframes adminToastIn{0%{opacity:0;transform:translate(80px)scale(.8)}to{opacity:1;transform:translate(0)scale(1)}}.admin-confirm-overlay{-webkit-backdrop-filter:blur(6px);z-index:9000;background:#00000073;justify-content:center;align-items:center;padding:1rem;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.admin-confirm-card{background:var(--paper);text-align:center;border-radius:24px;width:100%;max-width:400px;padding:2rem;animation:.35s cubic-bezier(.175,.885,.32,1.275) popIn;box-shadow:0 20px 60px #0000002e}.admin-confirm-icon{margin-bottom:.5rem;font-size:3rem}.admin-confirm-title{color:var(--ink);margin-bottom:.5rem;font-family:Nunito,sans-serif;font-size:1.3rem;font-weight:900}.admin-confirm-message{color:var(--text-muted);margin-bottom:1.5rem;font-size:14px;line-height:1.6}.admin-confirm-actions{justify-content:center;gap:10px;display:flex}.admin-confirm-actions .admin-btn{flex:1;max-width:160px}.admin-login-container{justify-content:center;align-items:center;width:100%;min-height:100vh;padding:1rem;display:flex}.admin-login-card{-webkit-backdrop-filter:blur(20px);text-align:center;background:#fffc;border:1px solid #ffffff80;border-radius:32px;width:100%;max-width:420px;padding:3rem 2.5rem;animation:.6s cubic-bezier(.175,.885,.32,1.275) popIn;box-shadow:0 16px 48px #00000014}.admin-login-icon{margin-bottom:.5rem;font-size:3.5rem}.admin-login-title{color:var(--primary);text-shadow:2px 2px #ffe066;margin-bottom:.3rem;font-family:ZCOOL KuaiLe,cursive;font-size:2.2rem}.admin-login-subtitle{color:var(--text-muted);margin-bottom:2rem;font-size:14px;font-weight:700}.admin-login-form{flex-direction:column;gap:1rem;display:flex}.admin-login-error{color:var(--primary-shadow);border:2px solid var(--primary);background:#fff5f5;border-radius:12px;padding:10px 14px;font-size:13px;font-weight:700;animation:.4s ease-in-out shake}.admin-login-btn{width:100%;margin-top:.5rem;padding:14px;font-size:16px}.admin-login-card .admin-back-link{margin-top:1.5rem;display:inline-block}.admin-empty{color:var(--text-muted);flex-direction:column;justify-content:center;align-items:center;padding:3rem 1rem;font-size:15px;font-weight:700;display:flex}.admin-empty-icon{opacity:.6;margin-bottom:.5rem;font-size:3rem}.admin-spinner{justify-content:center;align-items:center;gap:8px;padding:3rem 0;display:flex}.admin-spinner-dot{background:var(--secondary);border-radius:50%;width:12px;height:12px;animation:1.2s ease-in-out infinite adminBounce}.admin-spinner-dot:nth-child(2){animation-delay:.15s}.admin-spinner-dot:nth-child(3){animation-delay:.3s}@keyframes adminBounce{0%,80%,to{opacity:.4;transform:scale(.6)}40%{opacity:1;transform:scale(1)}}.admin-text-muted{color:var(--text-muted)}.admin-text-warn{color:var(--primary);font-weight:800}@media (max-width:900px){.admin-stats{grid-template-columns:repeat(2,1fr)}.admin-form-row{grid-template-columns:1fr 1fr}.admin-form-group-wide{grid-column:span 2}}@media (max-width:640px){.admin-container{padding:0 .5rem 2rem}.admin-header{flex-wrap:wrap;justify-content:center;gap:.5rem;padding:.8rem 0 1rem}.admin-title{order:-1;width:100%;font-size:1.6rem}.admin-stats{grid-template-columns:repeat(2,1fr);gap:10px}.admin-stat-card{border-radius:16px;padding:1rem .8rem}.admin-stat-icon{font-size:1.5rem}.admin-stat-value{font-size:1.6rem}.admin-stat-label{font-size:11px}.admin-tabs{border-radius:16px;gap:4px;padding:4px}.admin-tab{border-radius:12px;flex-direction:column;gap:2px;padding:10px 8px;font-size:13px}.admin-tab-label{font-size:11px}.admin-panel{border-radius:18px;padding:1rem}.admin-panel-header{flex-direction:column;align-items:flex-start;gap:8px}.admin-table{font-size:13px}.admin-table th,.admin-table td{padding:8px 10px}.admin-char-display{font-size:1.5rem}.admin-form-row{grid-template-columns:1fr}.admin-form-group-wide{grid-column:span 1}.admin-toast{padding:12px 16px;font-size:13px;top:12px;left:12px;right:12px}.admin-confirm-card{border-radius:20px;padding:1.5rem}.admin-login-card{border-radius:24px;padding:2rem 1.5rem}.admin-login-title{font-size:1.8rem}}.admin-subject-grid{grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px;margin-bottom:2rem;display:grid}.admin-subject-card{background:var(--paper);border:3px solid #e9ecef;border-left:6px solid var(--subject-color,#4dabf7);cursor:default;border-radius:20px;padding:1.2rem;transition:all .3s cubic-bezier(.175,.885,.32,1.275);position:relative}.admin-subject-card:hover{border-color:var(--subject-color,#4dabf7);transform:translateY(-2px);box-shadow:0 8px 24px #00000014}.admin-subject-card.active{border-color:var(--subject-color,#4dabf7);background:linear-gradient(135deg, #fff 0%, rgba(var(--subject-color), .05) 100%);box-shadow:0 8px 24px #0000001a}.admin-subject-card.disabled{opacity:.55}.admin-subject-card-header{align-items:center;gap:12px;margin-bottom:8px;display:flex}.admin-subject-icon{flex-shrink:0;font-size:36px;line-height:1}.admin-subject-info{flex:1;min-width:0}.admin-subject-name{color:var(--text-main);margin:0;font-family:Nunito,sans-serif;font-size:17px;font-weight:800;line-height:1.2}.admin-subject-key{color:var(--text-muted);background:#f1f3f5;border-radius:6px;padding:2px 8px;font-family:monospace;font-size:12px;font-weight:600}.admin-subject-meta{flex-shrink:0;gap:6px;display:flex}.admin-subject-desc{color:var(--text-muted);margin:4px 0 8px;font-size:13px;line-height:1.4}.admin-subject-footer{border-top:2px solid #f1f3f5;justify-content:space-between;align-items:center;margin-top:8px;padding-top:10px;display:flex}.admin-subject-lang{color:var(--text-muted);background:#f8f9fa;border-radius:10px;padding:4px 10px;font-size:13px;font-weight:700}.admin-items-section{border-top:3px dashed #e9ecef;margin-top:2rem;padding-top:1.5rem;animation:.3s adminSlideDown}.admin-pronunciation-row{align-items:center;gap:8px;display:flex}.admin-pronunciation-row .admin-form-input{flex:1}.admin-color-input{cursor:pointer;border-radius:12px;width:100%;height:44px;padding:4px}.admin-form-input select,.admin-form-input option{font-family:Nunito,sans-serif}select.admin-form-input{cursor:pointer;appearance:auto}@media (max-width:768px){.admin-subject-grid{grid-template-columns:1fr}.admin-subject-card-header{flex-wrap:wrap}.admin-subject-meta{width:100%;margin-top:8px}.admin-pronunciation-row{flex-direction:column}}.subject-home{justify-content:center;align-items:center;width:100%;min-height:100vh;padding:1rem;display:flex}.subject-home-card{background:var(--paper);border-radius:32px;width:100%;max-width:600px;padding:2.5rem;animation:.6s cubic-bezier(.175,.885,.32,1.275) popIn;box-shadow:0 12px 24px #0000000d,0 0 0 10px #fff9}.subject-home-header{justify-content:space-between;align-items:center;margin-bottom:.5rem;display:flex}.subject-home-title{color:var(--primary);text-shadow:3px 3px #ffe066;letter-spacing:2px;font-family:ZCOOL KuaiLe,cursive;font-size:2.4rem}.subject-home-subtitle{text-align:center;color:var(--text-muted);margin-bottom:2rem;font-size:16px;font-weight:700}.subject-grid{flex-direction:column;gap:14px;margin-bottom:2rem;display:flex}.subject-card{background:linear-gradient(135deg, color-mix(in srgb, var(--card-color) 10%, white) 0%, color-mix(in srgb, var(--card-color) 5%, white) 100%);border:3px solid color-mix(in srgb, var(--card-color) 20%, white);color:var(--text-main);cursor:pointer;border-radius:22px;align-items:center;gap:16px;padding:18px 22px;text-decoration:none;transition:all .3s cubic-bezier(.175,.885,.32,1.275);animation:.5s cubic-bezier(.175,.885,.32,1.275) both subjectCardIn;display:flex;position:relative}.subject-card:hover{box-shadow:0 10px 30px color-mix(in srgb, var(--card-color) 25%, transparent);border-color:var(--card-color);transform:translateY(-3px)scale(1.02)}.subject-card:active{transform:translateY(0)scale(.98)}@keyframes subjectCardIn{0%{opacity:0;transform:translateY(20px)scale(.95)}to{opacity:1;transform:translateY(0)scale(1)}}.subject-card-icon{background:#fff;border-radius:18px;flex-shrink:0;justify-content:center;align-items:center;width:64px;height:64px;font-size:48px;line-height:1;display:flex;box-shadow:0 4px 12px #0000000f}.subject-card-info{flex:1;min-width:0}.subject-card-name{color:var(--text-main);font-family:ZCOOL KuaiLe,cursive;font-size:22px;line-height:1.2}.subject-card-desc{color:var(--text-muted);margin-top:2px;font-size:13px;font-weight:600}.subject-card-items{color:var(--card-color);background:#fff;border-radius:10px;margin-top:4px;padding:3px 10px;font-size:12px;font-weight:700;display:inline-block}.subject-card-arrow{color:var(--card-color);opacity:.5;flex-shrink:0;margin-left:auto;font-size:24px;font-weight:800;transition:all .3s}.subject-card:hover .subject-card-arrow{opacity:1;transform:translate(4px)}.subject-home-footer{text-align:center;border-top:2px solid #f1f3f5;padding-top:1rem}.subject-admin-link{color:var(--text-muted);font-size:13px;font-weight:700;text-decoration:none;transition:color .2s}.subject-admin-link:hover{color:var(--secondary)}.subject-loading{justify-content:center;align-items:center;gap:8px;min-height:200px;display:flex}.subject-loading-dot{background:var(--secondary);border-radius:50%;width:14px;height:14px;animation:.6s infinite alternate subjectLoadBounce}.subject-loading-dot:nth-child(2){animation-delay:.2s}.subject-loading-dot:nth-child(3){animation-delay:.4s}@keyframes subjectLoadBounce{0%{opacity:.4;transform:translateY(0)}to{opacity:1;transform:translateY(-12px)}}.practice-back-btn{color:var(--text-muted);cursor:pointer;background:#f1f3f5;border:2px solid #e9ecef;border-radius:14px;align-items:center;gap:6px;margin-bottom:1rem;padding:8px 16px;font-family:Nunito,sans-serif;font-size:14px;font-weight:700;text-decoration:none;transition:all .2s;display:inline-flex}.practice-back-btn:hover{border-color:var(--secondary);color:var(--secondary);background:#e7f5ff}.practice-container{background:var(--paper);border-radius:32px;width:100%;max-width:500px;margin:0 auto;padding:2rem;animation:.5s cubic-bezier(.175,.885,.32,1.275) popIn;box-shadow:0 12px 24px #0000000d,0 0 0 10px #fff9}.practice-header{justify-content:space-between;align-items:center;margin-bottom:1.5rem;display:flex}.practice-title{color:var(--primary);text-shadow:2px 2px #ffe066;font-family:ZCOOL KuaiLe,cursive;font-size:1.8rem}.practice-score{color:var(--text-main);background:#f8f9fa;border-radius:16px;align-items:center;gap:8px;padding:8px 14px;font-size:16px;font-weight:800;display:flex}@media (max-width:520px){.subject-home-card{border-radius:24px;padding:1.5rem 1rem}.subject-home-title{font-size:1.8rem}.subject-home-header{flex-direction:column;gap:8px}.subject-card-icon{border-radius:14px;width:50px;height:50px;font-size:36px}.subject-card-name{font-size:18px}.practice-container{border-radius:24px;padding:1.5rem 1rem}.practice-title{font-size:1.5rem}}.subject-card-progress{align-items:center;gap:8px;margin-top:6px;display:flex}.subject-card-progress-bar{background:#00000014;border-radius:4px;flex:1;height:8px;overflow:hidden}.subject-card-progress-fill{background:var(--card-color);border-radius:4px;height:100%;transition:width .5s}.subject-card-progress-text{color:var(--card-color);white-space:nowrap;font-size:12px;font-weight:800}