:root{--bg-gradient: linear-gradient(135deg, #1a1c2c 0%, #4a192c 100%);--glass-bg: rgba(255, 255, 255, .1);--glass-border: rgba(255, 255, 255, .2);--text-primary: #ffffff;--text-secondary: #a0a0a0;--accent-primary: #00d2ff;--accent-secondary: #3a7bd5;--success: #00c853;--error: #ff3d00;--font-family: "Inter", system-ui, -apple-system, sans-serif}body{margin:0;padding:0;font-family:var(--font-family);background:var(--bg-gradient);background-attachment:fixed;color:var(--text-primary);min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}button{cursor:pointer;border:none;outline:none;font-family:inherit}input{font-family:inherit;outline:none}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#0000001a}::-webkit-scrollbar-thumb{background:#fff3;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#ffffff4d}.layout-container{min-height:100vh;width:100%;display:flex;align-items:center;justify-content:center;padding:2rem}.layout-card{width:100%;max-width:900px;min-height:600px;position:relative;background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:24px;box-shadow:0 25px 50px -12px #00000080;overflow:hidden;display:flex;flex-direction:column;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}.blob{position:absolute;border-radius:50%;filter:blur(80px);opacity:.4;pointer-events:none;z-index:0}.blob-1{top:-20%;left:-10%;width:50%;height:50%;background:#8b5cf6}.blob-2{bottom:-20%;right:-10%;width:50%;height:50%;background:#3b82f6}.layout-content{position:relative;z-index:10;flex:1;display:flex;flex-direction:column;height:100%}.home-container{padding:3rem;display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;text-align:center;color:var(--text-primary)}.home-title{font-size:3.5rem;font-weight:800;margin-bottom:3rem;background:linear-gradient(to right,#fff,#a5b4fc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.02em}.section-label{font-size:.9rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-secondary);margin-bottom:1rem;font-weight:600}.mode-selector{display:flex;gap:1rem;margin-bottom:2rem;background:#ffffff0d;padding:.5rem;border-radius:16px;border:1px solid rgba(255,255,255,.1)}.mode-option{position:relative;padding:1rem 2rem;cursor:pointer;font-weight:600;border-radius:12px;transition:color .3s;z-index:1}.mode-option.active{color:#fff}.mode-option:not(.active){color:var(--text-secondary)}.mode-bg{position:absolute;inset:0;background:var(--accent-secondary);border-radius:12px;z-index:-1}.sub-options{display:flex;gap:1rem;margin-bottom:2rem;flex-wrap:wrap;justify-content:center}.radio-label{display:flex;align-items:center;gap:.5rem;cursor:pointer;font-size:.95rem;color:var(--text-secondary);transition:color .2s}.radio-label:hover{color:var(--text-primary)}.radio-label input{accent-color:var(--accent-primary);width:1.2rem;height:1.2rem}.list-selector{width:100%;max-width:400px;margin-bottom:1rem}.list-box{display:flex;flex-direction:column;gap:.75rem;padding:1rem;background:#0003;border:1px solid rgba(255,255,255,.1);border-radius:16px;max-height:260px;overflow-y:auto}.list-option{width:100%;text-align:left;padding:.85rem 1rem;border-radius:12px;background:#ffffff08;border:1px solid rgba(255,255,255,.08);color:var(--text-primary);font-weight:600;cursor:pointer;transition:border-color .2s,transform .1s,box-shadow .2s}.list-option:hover{border-color:#ffffff40}.list-option:active{transform:translateY(1px)}.list-option.selected{border-color:var(--accent-primary);box-shadow:0 8px 20px -6px #3b82f6b3}.start-btn{margin-top:2rem;padding:1rem 4rem;font-size:1.2rem;font-weight:700;background:linear-gradient(135deg,var(--accent-secondary),var(--accent-primary));color:#fff;border-radius:50px;box-shadow:0 10px 20px -5px #3b82f680;transition:transform .2s,box-shadow .2s}.start-btn:hover{transform:translateY(-2px);box-shadow:0 15px 30px -5px #3b82f699}.start-btn:active{transform:translateY(0)}.word-count{margin-top:.5rem;font-size:.85rem;color:var(--text-secondary)}.test-container{padding:2rem;display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;width:100%;max-width:800px;margin:0 auto}.progress-bar{width:100%;height:6px;background:#ffffff1a;border-radius:3px;margin-bottom:2rem;overflow:hidden}.progress-fill{height:100%;background:var(--accent-primary);transition:width .3s ease}.card{background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:24px;padding:3rem;width:100%;display:flex;flex-direction:column;align-items:center;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.card.correct{background:#00c85333;border-color:#00c85366;box-shadow:0 0 30px #00c85333}.card.incorrect{background:#ff3d0033;border-color:#ff3d0066;box-shadow:0 0 30px #ff3d0033}.word-cn{font-size:2.5rem;font-weight:700;margin-bottom:1rem;text-align:center;color:var(--text-primary)}.word-pos{font-size:1rem;color:var(--text-secondary);background:#ffffff1a;padding:.25rem .75rem;border-radius:8px;margin-bottom:2rem}.input-group{display:flex;gap:1rem;width:100%;justify-content:center}.answer-box{width:100%;margin-top:1.25rem;padding:.9rem 1rem;background:#ffffff14;border:1px solid rgba(255,255,255,.12);border-radius:12px;text-align:center}.answer-label{font-size:.85rem;color:var(--text-secondary);letter-spacing:.5px;text-transform:uppercase;margin-bottom:.35rem}.answer-content{color:var(--text-primary);font-size:1.1rem;font-weight:600}.word-input{background:#0003;border:2px solid rgba(255,255,255,.1);border-radius:12px;padding:1rem;font-size:1.5rem;color:#fff;text-align:center;width:100%;max-width:300px;transition:all .2s}.word-input:focus{border-color:var(--accent-primary);background:#0000004d;box-shadow:0 0 0 4px #00d2ff1a}.word-input.error{border-color:var(--error);animation:shake .4s cubic-bezier(.36,.07,.19,.97) both}@keyframes shake{10%,90%{transform:translate3d(-1px,0,0)}20%,80%{transform:translate3d(2px,0,0)}30%,50%,70%{transform:translate3d(-4px,0,0)}40%,60%{transform:translate3d(4px,0,0)}}.controls{display:flex;gap:1rem;margin-top:2rem}.nav-btn{background:#ffffff1a;border:1px solid rgba(255,255,255,.1);color:var(--text-primary);width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .2s}.nav-btn:hover:not(:disabled){background:#fff3;transform:translateY(-2px)}.nav-btn:disabled{opacity:.3;cursor:not-allowed}.exit-btn{position:absolute;top:1rem;right:1rem;background:transparent;color:var(--text-secondary);font-size:.9rem;padding:.5rem 1rem;border-radius:8px;transition:all .2s}.exit-btn:hover{background:#ffffff1a;color:var(--text-primary)}@media(max-width:600px){.test-container{padding:1rem}.card{padding:1.5rem}.word-cn{font-size:1.8rem}.input-group{flex-direction:column}.word-input{max-width:100%}}