*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}body{font-family:Instrument Sans,sans-serif;min-height:100vh;display:flex;align-items:center;justify-content:center;overflow:hidden;background:linear-gradient(135deg,#0f0c29,#302b63,#24243e);position:relative}body:before{content:"";position:fixed;inset:0;background:radial-gradient(ellipse at 20% 50%,rgba(102,126,234,.15) 0%,transparent 60%),radial-gradient(ellipse at 80% 20%,rgba(118,75,162,.15) 0%,transparent 60%),radial-gradient(ellipse at 60% 80%,rgba(59,130,246,.08) 0%,transparent 50%);pointer-events:none}[x-cloak]{display:none!important}.language-switcher{position:fixed;top:20px;right:20px;display:flex;gap:8px;background:#ffffff14;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);padding:6px 12px;border-radius:50px;z-index:1000;border:1px solid rgba(255,255,255,.15)}.lang-btn{background:transparent;border:none;color:#ffffffb3;font-size:.85rem;font-weight:500;cursor:pointer;padding:5px 12px;border-radius:30px;transition:all .2s;text-decoration:none;display:inline-block}.lang-btn.active{background:#fff3;color:#fff}.lang-btn:hover:not(.active){color:#fff;background:#ffffff1a}.lab-starter-container{display:flex;align-items:center;justify-content:center;width:100%;padding:20px;position:relative;z-index:1}.lab-card{background:#ffffff0f;backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border:1px solid rgba(255,255,255,.12);border-radius:24px;padding:40px 44px;max-width:600px;width:100%;text-align:center;box-shadow:0 30px 60px -15px #00000080,0 0 0 1px #ffffff0a inset;animation:cardIn .45s cubic-bezier(.175,.885,.32,1.275) forwards}.lab-card__badges{display:flex;justify-content:center;gap:8px;margin-bottom:22px;flex-wrap:wrap}.lab-badge{display:inline-flex;align-items:center;gap:5px;padding:5px 14px;border-radius:50px;font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase}.lab-badge--lab{background:#3b82f62e;border:1px solid rgba(59,130,246,.35);color:#93c5fd}.lab-badge--exam{background:#f59e0b2e;border:1px solid rgba(245,158,11,.35);color:#fcd34d}.lab-badge--cluster{background:#ffffff12;border:1px solid rgba(255,255,255,.14);color:#ffffffa6}.lab-card__title{font-size:1.8rem;font-weight:800;color:#fff;line-height:1.25;margin-bottom:14px;letter-spacing:-.3px}.lab-card__description{font-size:.95rem;color:#fff9;line-height:1.7;margin-bottom:24px;max-width:480px;margin-left:auto;margin-right:auto}.lab-card__meta{display:flex;justify-content:center;gap:24px;flex-wrap:wrap;margin-bottom:30px;padding:12px 20px;background:#ffffff0d;border:1px solid rgba(255,255,255,.08);border-radius:12px}.lab-meta-item{display:flex;align-items:center;gap:7px;font-size:.875rem;color:#ffffffb3;font-weight:500}.lab-meta-icon{font-size:1rem}.start-btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:1.05rem;font-weight:700;padding:16px 48px;border-radius:50px;border:none;cursor:pointer;transition:all .25s ease;box-shadow:0 8px 24px #667eea66;letter-spacing:.2px;min-width:240px}.start-btn:hover{transform:translateY(-2px);box-shadow:0 14px 32px #667eea99}.start-btn:active{transform:translateY(0)}.start-btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}.lab-card__hint{margin-top:14px;font-size:.8rem;color:#ffffff59}.subtitle{margin-top:10px;color:#ffffff80;font-size:.9rem}.loading-container{background:#ffffff12;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,.12);border-radius:24px;padding:44px 40px;max-width:400px;width:100%;text-align:center;animation:cardIn .3s ease}.spinner{display:inline-block;width:52px;height:52px;border:3px solid rgba(255,255,255,.1);border-top:3px solid #667eea;border-radius:50%;animation:spin .85s linear infinite;margin-bottom:22px}.status-message{font-size:1.05rem;font-weight:600;color:#ffffffe6;margin-bottom:6px}.loading-text{font-size:.85rem;color:#fff6}.warning-message{background:#fbbf2414;border:1px solid rgba(251,191,36,.2);border-left:3px solid #fbbf24;padding:12px 14px;margin-top:22px;border-radius:10px;font-size:.83rem;color:#ffffffa6;text-align:left}.warning-icon{margin-right:5px}.warning-sub{font-size:.77rem;margin-top:4px;color:#fff6}.error-container{background:#ffffff12;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid rgba(239,68,68,.25);border-radius:24px;padding:40px;max-width:480px;width:100%;text-align:center;animation:cardIn .3s ease}.error-icon{font-size:3rem;margin-bottom:14px}.error-title{font-size:1.1rem;font-weight:700;color:#fca5a5;margin-bottom:14px}.error-box{text-align:left;background:#ef444412;border:1px solid rgba(239,68,68,.18);padding:12px 14px;border-radius:10px;max-height:140px;overflow-y:auto;margin-bottom:20px}.error-details{font-family:SFMono-Regular,Consolas,monospace;font-size:.82rem;color:#fca5a5;word-break:break-all;overflow-wrap:break-word}.error-message{color:#fca5a5;font-size:.95rem;margin-bottom:16px;word-break:break-all;overflow-wrap:break-word}.retry-btn{display:inline-flex;align-items:center;gap:8px;background:#ef4444bf;color:#fff;border:none;padding:12px 28px;border-radius:30px;cursor:pointer;font-size:.95rem;font-weight:600;transition:all .2s}.retry-btn:hover{background:#ef4444;transform:translateY(-1px)}@keyframes spin{to{transform:rotate(360deg)}}@keyframes cardIn{0%{opacity:0;transform:translateY(20px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(max-width:600px){.lab-card{padding:28px 20px;border-radius:18px}.lab-card__title{font-size:1.3rem}.lab-card__meta{gap:14px;padding:10px 14px}.start-btn{font-size:.95rem;padding:14px 30px;min-width:180px}.loading-container,.error-container{padding:30px 20px}}body.feedback-page{overflow-y:auto;align-items:flex-start}.feedback-container{display:flex;justify-content:center;align-items:flex-start;padding:30px 16px 40px;width:100%;min-height:100vh}.feedback-card{background:#fffffff7;max-width:500px;width:100%;padding:36px;border-radius:20px;box-shadow:0 20px 40px #00000059;margin:auto;animation:cardIn .35s ease}.feedback-card header h1{font-size:1.3rem;font-weight:800;color:#1e293b;margin-bottom:6px}.feedback-card header p{font-size:.9rem;color:#64748b;margin-bottom:28px}.star-rating input,.tag-chip input{position:absolute!important;opacity:0!important;pointer-events:none!important}.form-section{margin-bottom:24px;width:100%}.section-label{display:block;font-size:12px;font-weight:700;color:#475569;margin-bottom:12px;text-transform:uppercase;letter-spacing:.5px}.star-rating{display:flex;flex-direction:row-reverse;justify-content:center;gap:8px}.star-rating label{font-size:34px;color:#e2e8f0;cursor:pointer;transition:color .15s,transform .15s}.star-rating label:hover,.star-rating label:hover~label,.star-rating input:checked~label{color:#fbbf24;transform:scale(1.1)}.error-msg{background:#fef2f2;border:1px solid #fecaca;color:#991b1b;padding:8px 12px;border-radius:8px;font-size:13px;margin-bottom:10px}.tags-grid{display:flex;flex-wrap:wrap;gap:8px}.tag-chip span{display:inline-block;padding:7px 16px;background:#f8fafc;border:1px solid #e2e8f0;border-radius:50px;font-size:13px;color:#475569;cursor:pointer;transition:all .15s}.tag-chip input:checked+span{background:#3b82f6;color:#fff;border-color:#3b82f6}.tag-chip span:hover{border-color:#94a3b8}.feedback-card textarea{width:100%;min-height:100px;padding:12px 14px;border:1px solid #e2e8f0;border-radius:12px;font-size:14px;font-family:inherit;resize:vertical;color:#1e293b;transition:border-color .2s}.feedback-card textarea:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px #3b82f61a}.btn-submit{width:100%;padding:15px;background:#1e293b;color:#fff;border:none;border-radius:12px;font-weight:700;font-size:15px;margin-top:8px;cursor:pointer;transition:background .2s,transform .1s}.btn-submit:hover{background:#0f172a}.btn-submit:active{transform:scale(.99)}@media(max-width:480px){.feedback-card{padding:24px 16px}.star-rating label{font-size:28px}}