@font-face{font-family:Nunito;font-style:normal;font-weight:400 900;font-display:swap;src:url(../../../fonts/nunito-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2212}@font-face{font-family:Nunito;font-style:normal;font-weight:400 900;font-display:swap;src:url(../../../fonts/nunito-latin-ext.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}:root{--bg: #f8f5ef;--card: #ffffff;--text: #3a3d5c;--muted: #8b8da6;--primary: #5661e8;--primary-dark: #3f49c9;--primary-soft: #eef0fd;--gold: #f7b733;--gold-soft: #fdf3da;--success: #27a86a;--success-bg: #e4f6ec;--error: #e25c5c;--error-bg: #fdecec;--warn: #f0a32a;--border: #ece8dd;--radius: 20px;--shadow: 0 1px 2px rgba(58, 61, 92, .04), 0 10px 30px -8px rgba(58, 61, 92, .12);font-size:16px}*{box-sizing:border-box}body{margin:0;font-family:Nunito,Segoe UI,system-ui,-apple-system,sans-serif;background:radial-gradient(900px 480px at 12% -8%,#eceefe 0%,transparent 55%),radial-gradient(800px 420px at 105% -5%,#fdf2d8 0%,transparent 50%),var(--bg);background-attachment:fixed;color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased;line-height:1.55}h1,h2,h3{font-weight:800;margin:0 0 .5em;line-height:1.25}a{color:var(--primary)}.container{max-width:640px;margin:0 auto;padding:1.25rem}.container.wide{max-width:1000px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.6rem;margin-bottom:1.1rem}.brand{display:flex;align-items:center;justify-content:center;gap:.7rem;margin:1.2rem 0 1.4rem}.brand img{width:52px;height:52px;border-radius:14px;box-shadow:var(--shadow)}.brand h1{margin:0;font-size:2rem;letter-spacing:-.01em}.brand.small img{width:40px;height:40px;border-radius:11px}.brand.small h1{font-size:1.35rem}.btn{display:inline-block;border:none;border-radius:14px;background:var(--primary);color:#fff;font-family:inherit;font-size:1.05rem;font-weight:800;padding:.8rem 1.6rem;cursor:pointer;box-shadow:0 3px 0 var(--primary-dark);transition:transform .08s ease,box-shadow .08s ease,filter .15s;text-decoration:none;text-align:center}.btn:hover{filter:brightness(1.07)}.btn:active{transform:translateY(3px);box-shadow:0 0 0 var(--primary-dark)}.btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}.btn.secondary{background:var(--primary-soft);color:var(--primary-dark);box-shadow:0 3px #d8dbf6}.btn.danger{background:var(--error);box-shadow:0 3px #c44747}.btn.big{font-size:1.25rem;padding:1rem 2.2rem;width:100%;border-radius:16px}input[type=text],input[type=password],input[type=email],input[type=number],input[type=url],input[type=time],textarea,select{font-family:inherit;font-size:1.05rem;font-weight:600;padding:.7rem .95rem;border:2px solid var(--border);border-radius:13px;background:#fcfbf8;color:var(--text);width:100%;transition:border-color .15s,background .15s}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--primary);background:#fff}::placeholder{color:#b9bbcf;font-weight:600;opacity:1}.answer-input::placeholder{font-size:1.05rem;font-weight:600}label{display:block;font-weight:800;margin:.9rem 0 .35rem;font-size:.92rem}.field-row{display:flex;gap:.75rem;align-items:center}.error-msg{background:var(--error-bg);color:var(--error);border-radius:12px;padding:.7rem 1rem;font-weight:800;margin:.8rem 0}.success-msg{background:var(--success-bg);color:var(--success);border-radius:12px;padding:.7rem 1rem;font-weight:800;margin:.8rem 0}.question{font-size:clamp(1.4rem,4.5vw,2rem);font-weight:800;text-align:center;white-space:pre-line;margin:1.2rem 0;line-height:1.5}.question.long{font-size:clamp(1.05rem,3vw,1.3rem);text-align:left;font-weight:700}.answer-input{font-size:1.5rem!important;font-weight:800!important;text-align:center;max-width:280px;margin:0 auto}.progress-bar{height:14px;background:#edeae0;border-radius:999px;overflow:hidden;margin:.5rem 0 1rem;border:1px solid var(--border)}.progress-bar>div{height:100%;background:linear-gradient(90deg,var(--gold),#f99046);border-radius:999px;transition:width .4s ease}.choice-btns{display:flex;gap:.8rem;justify-content:center;flex-wrap:wrap}.choice-btns .btn{min-width:80px;font-size:1.4rem}.frac-input{display:flex;flex-direction:column;align-items:center;gap:.4rem;width:130px;margin:0 auto}.frac-input hr{width:100%;border:none;border-top:3px solid var(--text);margin:0}.stat-chips{display:flex;gap:.55rem;justify-content:center;flex-wrap:wrap}.chip{background:var(--card);border:1px solid var(--border);border-radius:999px;box-shadow:0 2px 8px #3a3d5c0f;padding:.45rem 1rem;font-weight:800;font-size:.95rem}.avatar-grid{display:flex;flex-wrap:wrap;gap:.9rem;justify-content:center}.avatar-btn{display:flex;flex-direction:column;align-items:center;gap:.3rem;background:var(--card);border:2px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1rem 1.4rem;font-family:inherit;font-size:1rem;font-weight:800;color:var(--text);cursor:pointer;transition:transform .12s,border-color .12s}.avatar-btn:hover{transform:translateY(-3px)}.avatar-btn.selected{border-color:var(--primary);background:var(--primary-soft)}.avatar-btn .emoji{font-size:3rem;line-height:1}.pin-pad{display:grid;grid-template-columns:repeat(3,1fr);gap:.6rem;max-width:260px;margin:1rem auto}.pin-pad button{font-family:inherit;font-size:1.5rem;font-weight:800;padding:.85rem;border:none;border-radius:14px;background:var(--primary-soft);color:var(--primary-dark);cursor:pointer;box-shadow:0 2px #d8dbf6;transition:transform .06s}.pin-pad button:active{background:var(--primary);color:#fff;transform:translateY(2px);box-shadow:none}.pin-dots{display:flex;gap:.6rem;justify-content:center;margin:.8rem 0}.pin-dots span{width:16px;height:16px;border-radius:50%;background:#e4e1d6;transition:background .15s,transform .15s}.pin-dots span.filled{background:var(--gold);transform:scale(1.15)}.admin-nav{display:flex;gap:.45rem;flex-wrap:wrap;margin-bottom:1.2rem}.admin-nav a{text-decoration:none;font-weight:800;padding:.5rem 1.05rem;border-radius:999px;color:var(--text);background:var(--card);border:1px solid var(--border)}.admin-nav a.active{background:var(--primary);border-color:var(--primary);color:#fff}table{width:100%;border-collapse:collapse;font-size:.95rem}th,td{text-align:left;padding:.6rem;border-bottom:1px solid #f1eee5}th{color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.05em}.rate-good{color:var(--success);font-weight:800}.rate-mid{color:var(--warn);font-weight:800}.rate-bad{color:var(--error);font-weight:800}.topic-list{display:flex;flex-direction:column;gap:.35rem}.topic-row{display:flex;align-items:center;gap:.6rem;background:#faf8f3;border:1px solid var(--border);border-radius:10px;padding:.5rem .75rem;transition:background .12s}.topic-row.topic-active{background:var(--primary-soft, #eef3ff);border-color:var(--primary)}.topic-row input[type=checkbox]{width:20px;height:20px;accent-color:var(--primary);flex-shrink:0}.topic-name{margin:0;font-weight:700;font-size:.92rem;flex:1 1 0;min-width:0}.topic-stat{font-size:.82rem;font-weight:800;flex-shrink:0}.topic-actions{display:flex;align-items:center;gap:.3rem;flex-shrink:0;margin-left:auto}.topic-diff{width:auto;padding:.2rem .4rem;font-size:.85rem;border-radius:7px}.feedback-correct{text-align:center;font-size:1.4rem;font-weight:800;color:var(--success)}.feedback-wrong{text-align:center;font-size:1.2rem;font-weight:800;color:var(--error)}.solution-box{background:var(--gold-soft);border-left:5px solid var(--gold);border-radius:11px;padding:.9rem 1rem;margin-top:1rem;text-align:left}.confetti-piece{position:fixed;top:-20px;width:12px;height:12px;border-radius:3px;z-index:999;animation:confetti-fall linear forwards;pointer-events:none}@keyframes confetti-fall{to{transform:translateY(110vh) rotate(720deg)}}.preview-btn{background:none;border:1px solid var(--border);cursor:pointer;font-size:.95rem;padding:.2rem .45rem;border-radius:7px;opacity:.55;transition:opacity .12s,background .12s,border-color .12s;flex-shrink:0;line-height:1}.preview-btn:hover{opacity:1;background:var(--primary-soft)}.preview-panel-inline{margin:.25rem 0 .35rem;padding:.8rem 1rem;background:var(--gold-soft);border:1px solid var(--gold);border-left:4px solid var(--gold);border-radius:0 10px 10px}.preview-header{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;margin-bottom:.5rem}.preview-close{background:none;border:none;cursor:pointer;font-size:1.1rem;color:var(--muted);margin-left:auto;padding:.2rem .4rem;border-radius:6px}.preview-close:hover{background:var(--error-bg);color:var(--error)}.preview-question{font-size:1.15rem;font-weight:800;white-space:pre-line;margin-bottom:.6rem;line-height:1.5}.preview-solution{font-size:1rem;font-weight:700;color:var(--success);margin-bottom:.3rem}.preview-path{font-size:.9rem;color:var(--muted);font-weight:600;margin-bottom:.3rem}tr.expandable{cursor:pointer}tr.expandable:hover{background:#faf8f3}.expand-hint{color:var(--muted);font-size:.85rem;margin-left:.3rem}.task-details-row td{padding:0 .6rem .8rem!important;border-bottom:2px solid var(--border)}.task-details{display:flex;flex-direction:column;gap:.5rem}.task-detail{background:#faf8f3;border:1px solid var(--border);border-radius:11px;padding:.6rem .8rem}.task-detail.task-wrong{border-left:4px solid var(--error)}.task-detail.task-correct{border-left:4px solid var(--success)}.task-header{display:flex;align-items:center;gap:.4rem;font-weight:800;font-size:.9rem;margin-bottom:.25rem}.task-nr{color:var(--muted)}.task-topic{color:var(--text)}.task-attempts{color:var(--muted);font-weight:600;font-size:.82rem}.task-question{font-size:.95rem;font-weight:700;margin-bottom:.3rem;white-space:pre-line}.task-answers{display:flex;flex-wrap:wrap;gap:.4rem;margin-bottom:.2rem}.task-answer{display:inline-flex;align-items:center;gap:.3rem;background:var(--card);border:1px solid var(--border);border-radius:8px;padding:.2rem .55rem;font-size:.88rem;font-weight:700}.task-answer.first-try{color:var(--error);text-decoration:line-through;opacity:.7}.task-answer.final-answer{border-color:var(--primary)}.try-label{font-size:.78rem;color:var(--muted);font-weight:600}.task-solution{font-size:.88rem;font-weight:800;color:var(--error);margin-top:.15rem}.heat-row{display:flex;align-items:center;gap:.7rem;margin-bottom:.6rem}.heat-name{flex:0 0 110px;font-weight:800;font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.heat-cells{display:grid;grid-template-columns:repeat(30,1fr);gap:3px;flex:1;min-width:0}.heat-cell{aspect-ratio:1;border-radius:3px;background:#edeae0;min-width:0}.heat-cell.done{background:var(--success)}.heat-cell.today{outline:2px solid var(--primary);outline-offset:1px}.heat-legend{display:flex;gap:1rem;color:var(--muted);font-size:.8rem;font-weight:700;margin-top:.4rem;flex-wrap:wrap}.heat-legend span:before{content:"";display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:.3rem;background:#edeae0}.heat-legend .l-done:before{background:var(--success)}@media(max-width:700px){table.responsive{display:block}table.responsive thead{display:none}table.responsive tbody{display:block}table.responsive tr{display:block;background:#faf8f3;border:1px solid var(--border);border-radius:14px;padding:.5rem .8rem;margin-bottom:.7rem}table.responsive td{display:flex;justify-content:space-between;align-items:center;gap:.8rem;border:none;padding:.3rem 0;text-align:right}table.responsive td:before{content:attr(data-label);font-weight:800;color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;text-align:left;flex-shrink:0}table.responsive td[data-label=""]:before{display:none}table.responsive td:not([data-label]){justify-content:flex-start;text-align:left}table.responsive tr.task-details-row{padding:0;border:none;margin-top:-.4rem}table.responsive tr.task-details-row td{display:block;text-align:left}table.responsive tr.task-details-row td:before{display:none}}@media(max-width:520px){.container{padding:.8rem}.card{padding:1.15rem}h1{font-size:1.5rem}.brand h1{font-size:1.6rem}.admin-nav a{padding:.45rem .8rem;font-size:.9rem}.heat-name{flex-basis:80px}.field-row{flex-wrap:wrap}}