*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--green: #1D9E75;--green-dark: #0F6E56;--green-light: #E1F5EE;--blue: #185FA5;--blue-light: #E6F1FB;--amber: #BA7517;--amber-light: #FAEEDA;--red: #A32D2D;--red-light: #FCEBEB;--coral: #D85A30;--bg: #FFFFFF;--bg-secondary: #F5F5F3;--bg-tertiary: #EEECEA;--border: rgba(0,0,0,.1);--border-mid: rgba(0,0,0,.18);--text: #1A1A1A;--text-2: #555553;--text-3: #888886;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--radius-xl: 20px;--sidebar-w: 220px;--nav-h: 64px;--shadow: 0 1px 4px rgba(0,0,0,.08)}@media (prefers-color-scheme: dark){:root{--bg: #1A1A1A;--bg-secondary: #242424;--bg-tertiary: #2E2E2E;--border: rgba(255,255,255,.1);--border-mid: rgba(255,255,255,.18);--text: #F0EFED;--text-2: #AAAAAA;--text-3: #666666;--green-light: #0F3D2A;--blue-light: #0A1E3A;--amber-light: #3A2500;--red-light: #3A0F0F}}html,body,#root{height:100%;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;font-size:16px;color:var(--text);background:var(--bg-tertiary);-webkit-font-smoothing:antialiased}.app-shell{display:flex;height:100vh;overflow:hidden}.sidebar{width:var(--sidebar-w);background:var(--bg);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:1.25rem 0;flex-shrink:0;overflow-y:auto}.sidebar-logo{padding:0 1.25rem 1.25rem;border-bottom:1px solid var(--border);margin-bottom:.75rem}.sidebar-logo h1{font-size:17px;font-weight:600;color:var(--green)}.sidebar-logo span{font-size:12px;color:var(--text-3)}.sidebar-nav{flex:1;padding:0 .75rem}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:var(--radius-md);font-size:14px;font-weight:500;color:var(--text-2);text-decoration:none;transition:all 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.nav-icon{font-size:22px}.bottom-nav-item.active{color:var(--green)}@media (max-width: 768px){.sidebar{display:none}.bottom-nav{display:flex}.main-content{padding:1rem 1rem calc(var(--nav-h) + 1rem)}}.card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.25rem}.card+.card{margin-top:.75rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 16px;border-radius:var(--radius-md);font-size:14px;font-weight:500;cursor:pointer;border:1px solid var(--border-mid);background:transparent;color:var(--text-2);transition:all .15s;text-decoration:none}.btn:hover{background:var(--bg-secondary)}.btn:active{transform:scale(.98)}.btn-primary{background:var(--green);color:#fff;border-color:var(--green)}.btn-primary:hover{background:var(--green-dark);border-color:var(--green-dark)}.btn-block{width:100%}.btn-sm{padding:5px 10px;font-size:13px}.btn-danger{color:var(--red);border-color:#f09595}.btn-danger:hover{background:var(--red-light)}.input{width:100%;padding:10px 12px;border:1px solid var(--border-mid);border-radius:var(--radius-md);font-size:14px;background:var(--bg);color:var(--text);transition:border-color .15s}.input:focus{outline:none;border-color:var(--green)}.input.error{border-color:var(--red)}.select{width:100%;padding:9px 12px;border:1px solid var(--border-mid);border-radius:var(--radius-md);font-size:14px;background:var(--bg);color:var(--text)}.form-group{margin-bottom:1rem}.form-label{display:block;font-size:13px;font-weight:500;color:var(--text-2);margin-bottom:.35rem}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.badge{display:inline-block;font-size:11px;font-weight:600;padding:2px 8px;border-radius:99px;letter-spacing:.03em}.badge-a1{background:var(--green-light);color:#085041}.badge-a2{background:var(--blue-light);color:#0c447c}.badge-b1{background:var(--amber-light);color:#633806}.badge-b2{background:#faece7;color:#4a1b0c}.badge-c1{background:#f3e8ff;color:#5b21b6}.badge-c2{background:#fce7f3;color:#9d174d}@media (prefers-color-scheme: dark){.badge-a1{color:#6ee7c0}.badge-a2{color:#7ec4ff}.badge-b1{color:#ffc96b}.badge-b2{color:#ffaa80}.badge-c1{color:#c4a0ff}.badge-c2{color:#f9a8d4}}.progress-bar{height:6px;background:var(--bg-secondary);border-radius:99px;overflow:hidden}.progress-fill{height:100%;background:var(--green);border-radius:99px;transition:width .4s ease}.feedback{padding:12px 14px;border-radius:var(--radius-md);font-size:14px;line-height:1.5}.feedback-ok{background:#1d9e75;color:#fff;border:1px solid #0F6E56}.feedback-fail{background:#a32d2d;color:#fff;border:1px solid #7A1F1F}.feedback-hint{background:var(--amber-light);color:#412402;border:1px solid #FAC775}.feedback-coach{background:var(--bg-secondary);color:var(--text-2);border:1px solid var(--border)}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:1.25rem}@media (max-width: 600px){.stats-grid{grid-template-columns:repeat(2,1fr)}}.stat-card{background:var(--bg-secondary);border-radius:var(--radius-md);padding:.875rem;text-align:center}.stat-num{font-size:24px;font-weight:600;color:var(--text)}.stat-lbl{font-size:12px;color:var(--text-3);margin-top:3px}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.page-title{font-size:22px;font-weight:600}.page-sub{font-size:14px;color:var(--text-3);margin-top:2px}.tabs{display:flex;border-bottom:1.5px solid var(--border);margin-bottom:1.5rem;overflow-x:auto}.tab{padding:9px 16px;border:none;background:transparent;cursor:pointer;font-size:14px;color:var(--text-3);border-bottom:2.5px solid transparent;margin-bottom:-1.5px;transition:color .15s;white-space:nowrap;font-weight:500}.tab:hover{color:var(--text)}.tab.active{color:var(--text);border-bottom-color:var(--text)}.tab.active-green{color:var(--green);border-bottom-color:var(--green)}.word-card{background:var(--bg);border:1.5px solid var(--border);border-radius:var(--radius-xl);padding:2.5rem 1.5rem;text-align:center;margin-bottom:1.25rem;transition:border-color .2s}.word-card.correct{border-color:var(--green)}.word-card.wrong{border-color:var(--red)}.word-main{font-size:36px;font-weight:600;margin-bottom:.5rem}.word-type{font-size:12px;color:var(--text-3);margin-top:.25rem}.word-ipa{font-size:14px;color:var(--text-3);margin-top:.25rem;font-style:italic}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:1rem}.option-btn{padding:14px;border:1px solid var(--border-mid);border-radius:var(--radius-md);background:var(--bg);cursor:pointer;font-size:15px;color:var(--text);transition:all .15s;text-align:left}.option-btn:hover:not(:disabled){background:var(--bg-secondary);border-color:var(--border-mid)}.option-btn.correct{background:#1d9e75;border-color:#1d9e75;color:#fff}.option-btn.wrong{background:#a32d2d;border-color:#a32d2d;color:#fff}.option-btn:disabled{cursor:default}.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--green);border-radius:50%;animation:spin .6s linear infinite;margin:2rem auto}@keyframes spin{to{transform:rotate(360deg)}}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:1rem;color:var(--text-3)}.toggle{position:relative;width:40px;height:22px}.toggle input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--border-mid);border-radius:99px;cursor:pointer;transition:.2s}.toggle-slider:before{content:"";position:absolute;width:16px;height:16px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s}.toggle input:checked+.toggle-slider{background:var(--green)}.toggle input:checked+.toggle-slider:before{transform:translate(18px)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:200;padding:1rem}.modal{background:var(--bg);border-radius:var(--radius-xl);padding:1.5rem;width:100%;max-width:440px;box-shadow:0 20px 60px #0003}.modal-title{font-size:17px;font-weight:600;margin-bottom:1.25rem}.modal-footer{display:flex;justify-content:flex-end;gap:8px;margin-top:1.25rem}.divider{height:1px;background:var(--border);margin:1rem 0}.text-muted{color:var(--text-3);font-size:13px}.text-center{text-align:center}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.gap-2{gap:.5rem}.flex{display:flex}.flex-between{display:flex;justify-content:space-between;align-items:center}.flex-center{display:flex;justify-content:center;align-items:center}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:10px}