@font-face{font-family:PixelMono;src:local('DejaVu Sans Mono'),local('SFMono-Regular'),local('Consolas');font-display:swap}
:root{--bg:#08080e;--panel:#11111c;--panel2:#161624;--line:#303040;--text:#f0eff9;--muted:#9998ad;--purple:#ac86ff;--cyan:#62e6df;--gold:#ffc953;--red:#ff4a62;--orange:#ffae48;--green:#6de3a0;--font:PixelMono,'Lucida Console',Monaco,monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:13px;line-height:1.65}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:var(--cyan);text-underline-offset:4px}button:disabled{cursor:default;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--gold);outline-offset:4px}button{color:inherit}button svg,a svg{pointer-events:none}h1,h2,h3,p{margin:0}h1{font-size:24px;letter-spacing:-.8px;line-height:1.5}h2{font-size:16px;letter-spacing:.2px;line-height:1.6}h3{font-size:13px}small{font-size:11px}.muted{color:var(--muted)}.cyan{color:var(--cyan)}.gold{color:var(--gold)}.purple{color:var(--purple)}.red{color:var(--red)}.green{color:var(--green)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.skip-link{position:fixed;top:-80px;left:20px;padding:10px;background:var(--gold);color:black;z-index:99}.skip-link:focus{top:10px}.icon{width:20px;height:20px;display:inline-block;vertical-align:middle;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linejoin:miter}.pixel-heart{width:20px;height:20px;fill:currentColor;image-rendering:pixelated;vertical-align:middle}.boot{padding:60px;color:var(--red)}
.sidebar{position:fixed;inset:0 auto 0 0;width:226px;border-right:1px solid var(--line);background:#0c0c13;padding:30px 20px;display:flex;flex-direction:column;z-index:20}.brand{display:flex;align-items:center;gap:13px;background:none;border:0;text-align:left;padding:0 4px 32px;color:var(--text)}.brand .pixel-heart{width:29px;height:29px;color:var(--red)}.brand b{display:block;font-size:14px;line-height:1.45;letter-spacing:1px}.brand small{display:block;color:var(--muted);font-size:9px;letter-spacing:2px;margin-top:7px}.nav-label{font-size:9px;color:#69687b;letter-spacing:2px;padding:15px 15px 10px}.nav{display:flex;flex-direction:column;gap:6px}.nav button{display:flex;align-items:center;gap:12px;text-align:left;background:none;border:1px solid transparent;min-height:45px;padding:11px 14px;font-size:11px;position:relative;color:var(--muted)}.nav button:hover{background:#191726;color:var(--text)}.nav button.active{color:var(--purple);background:#211930;border-color:#493665}.nav button.active:before{content:'';position:absolute;left:-21px;height:20px;width:3px;background:var(--purple)}.nav .count{margin-left:auto;font-size:10px;color:var(--gold)}.sidebar-bottom{margin-top:auto;padding-top:24px}.save-panel{border:1px solid var(--line);padding:17px 13px;background:#12121d}.save-panel .save-title{display:flex;align-items:center;gap:10px;color:var(--gold);font-size:11px}.save-panel p{font-size:10px;color:var(--muted);margin-top:9px}.sidebar-bottom .small-link{padding:17px 4px 0;display:flex;align-items:center;gap:8px;text-decoration:none;font-size:10px;color:var(--muted)}.shell{margin-left:226px;min-height:100vh}.topbar{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 38px;border-bottom:1px solid #222230;background:#0b0b12;gap:20px}.breadcrumb{font-size:10px;letter-spacing:1.2px;color:var(--muted)}.breadcrumb span{color:var(--text)}.top-right{display:flex;align-items:center;gap:22px;font-size:10px}.saved-label{display:flex;align-items:center;gap:7px;color:var(--muted)}.saved-label:before{content:'';width:5px;height:5px;background:var(--green)}.avatar{width:30px;height:30px;border:1px solid #635483;display:grid;place-items:center;background:#261e38;color:var(--purple);font-size:13px}.mobile-brand{display:none}.main{padding:30px 38px 40px;max-width:1480px;margin:auto}.page-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:26px;gap:18px}.eyebrow{color:var(--purple);font-size:10px;letter-spacing:1.6px;margin-bottom:7px}.subtext{font-size:11px;color:var(--muted);margin-top:8px;max-width:760px;line-height:1.9}.tag{display:inline-flex;align-items:center;gap:6px;font-size:9px;letter-spacing:.3px;padding:4px 8px;white-space:nowrap;border:1px solid var(--line);color:var(--muted);background:#12121b}.tag.author{border-color:#4a3669;background:#241c35;color:var(--purple)}.tag.fipi{color:var(--cyan);border-color:#285451;background:#112b2a}.tag.manual{color:var(--gold);border-color:#5c4b28;background:#2c2415}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:42px;padding:10px 17px;background:transparent;border:1px solid #595365;color:var(--text);text-decoration:none;font-size:11px;font-weight:bold;letter-spacing:.4px;line-height:1.5}.btn:hover{border-color:var(--text);background:#ffffff08}.btn.primary{border:2px solid var(--orange);color:var(--orange);box-shadow:3px 3px 0 #5b3613}.btn.primary:hover{background:#ffae4812;box-shadow:1px 1px 0 #5b3613;transform:translate(1px,1px)}.btn.purple-btn{border-color:var(--purple);color:var(--purple)}.btn.danger{border-color:#65404b;color:var(--red)}.btn.small{min-height:32px;padding:7px 11px;font-size:10px}.btn.text-btn{border:0;color:var(--muted);padding:8px}.btn.text-btn:hover{color:var(--text)}.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.dashboard-top{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:20px}.hero{border:1px solid #5e447e;background:linear-gradient(120deg,#231631,#1b132a 60%,#19162b);position:relative;overflow:hidden;min-height:254px;padding:28px}.hero:after{content:'';position:absolute;inset:0;background-image:radial-gradient(#c3a1ff33 .6px,transparent .6px);background-size:16px 16px;pointer-events:none;mask-image:linear-gradient(90deg,transparent 40%,black)}.hero-copy{position:relative;z-index:2;max-width:70%}.hero .eyebrow{color:#c6aaff;font-size:9px}.hero h2{font-size:23px;line-height:1.55;letter-spacing:.3px;margin:12px 0 13px}.hero p{color:#b8a6d1;max-width:420px;font-size:11px;line-height:1.9}.hero .actions{margin-top:24px;gap:17px}.hero .btn{font-size:10px}.hero-emblem{position:absolute;right:20px;top:39px;width:165px;height:165px;color:#b292f3;opacity:.85;z-index:1}.hero-emblem .pixel-heart{position:absolute;top:52px;left:65px;width:35px;height:35px;color:var(--red);filter:drop-shadow(0 0 14px #ff4a6260);animation:beat 4s steps(2,end) infinite}.rune-svg{width:100%;height:100%;fill:currentColor}.save-star{font-size:27px;color:var(--gold);filter:drop-shadow(0 0 9px #ffc95345)}.floating-star{position:absolute;color:var(--gold);font-size:14px}.hero .s1{right:30px;top:29px}.hero .s2{right:178px;top:162px;font-size:10px}.player-card{background:var(--panel);border:1px solid var(--line);padding:23px;display:flex;flex-direction:column;justify-content:space-between}.player-head{display:flex;justify-content:space-between;align-items:center}.player-head small{font-size:9px;letter-spacing:1.4px;color:var(--muted)}.player-name{font-size:17px;margin-top:12px;overflow-wrap:anywhere}.player-level{display:flex;align-items:baseline;gap:10px;margin-top:8px}.player-level b{font-size:36px;color:var(--gold);line-height:1.3}.player-level span{color:var(--muted);font-size:11px}.progress{height:7px;background:#2d283d;overflow:hidden}.progress span{height:100%;display:block;background:var(--purple);transition:width .3s}.xp-row{display:flex;justify-content:space-between;font-size:9px;color:var(--muted);margin-bottom:8px}.player-card .progress{margin-bottom:8px}.player-card .tiny{font-size:9px;color:var(--muted)}.stats-strip{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);margin:20px 0}.stat{padding:19px 21px;background:var(--panel);border-right:1px solid var(--line)}.stat:last-child{border:0}.stat-top{display:flex;align-items:center;gap:9px;font-size:10px;color:var(--muted)}.stat-value{font-size:26px;line-height:1.45;margin-top:8px;display:flex;align-items:baseline;gap:7px}.stat-value small{color:var(--muted);font-size:10px}.dashboard-middle{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:20px}.panel{border:1px solid var(--line);background:var(--panel);padding:23px}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px}.panel-head h2{font-size:13px;letter-spacing:.4px}.panel-head .small-link{font-size:10px;text-decoration:none;color:var(--purple);background:none;border:0}.panel-head .small-link:hover{color:var(--text)}.map-legend{display:flex;gap:20px;font-size:9px;color:var(--muted);margin-bottom:18px;flex-wrap:wrap}.map-legend span{display:flex;align-items:center;gap:6px}.legend-dot{width:6px;height:6px;background:var(--line)}.legend-dot.training{background:var(--purple)}.legend-dot.master{background:var(--cyan)}.mini-map{display:grid;grid-template-columns:repeat(10,1fr);gap:8px}.map-node{aspect-ratio:1;border:1px solid #454050;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#14131f;font-size:14px;position:relative}.map-node:hover{border-color:var(--purple);background:#241d33;color:var(--purple)}.map-node .node-dot{width:4px;height:4px;background:#484254;margin-top:6px}.map-node.training .node-dot{background:var(--purple)}.map-node.mastered .node-dot{background:var(--cyan)}.map-node.training{border-color:#6c508d}.map-node.mastered{border-color:#348d89;color:var(--cyan);background:#122326}.map-node.part2{background:#1d1826;border-style:dashed}.map-caption{font-size:9px;color:var(--muted);margin-top:16px;line-height:1.9}.daily-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.daily-top h2{font-size:12px}.goal-ring{width:112px;height:112px;position:relative;display:grid;place-items:center;margin:8px auto 16px;border-radius:50%;background:conic-gradient(var(--gold) calc(var(--progress)*1%),#2c2839 0)}.goal-ring:before{content:'';position:absolute;inset:6px;border-radius:50%;background:var(--panel)}.goal-ring>div{position:relative;text-align:center}.goal-ring b{font-size:23px}.goal-ring small{display:block;font-size:9px;color:var(--muted)}.week{display:flex;justify-content:space-between;gap:7px;margin-top:20px}.week-day{text-align:center;flex:1;font-size:9px;color:var(--muted)}.day-square{height:23px;border:1px solid #403949;background:#191621;display:grid;place-items:center;margin-bottom:6px}.week-day.today .day-square{border-color:var(--gold)}.week-day.done .day-square{background:#3b2c53;color:var(--purple);border-color:var(--purple)}.daily-note{font-size:9px;line-height:1.8;color:var(--muted);margin-top:17px}.next-mission{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:22px 24px;margin-top:20px;border:1px solid #4b4030;background:#1a1712}.next-mission .mission-copy{display:flex;align-items:center;gap:18px}.mission-copy .icon{width:30px;height:30px;color:var(--gold)}.mission-copy p{font-size:10px;color:var(--muted);margin-top:5px}.footer-note{font-size:9px;color:#747185;margin-top:28px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.footer-note a{color:#aaa1bd}.toolbar{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:20px}.chips{display:flex;flex-wrap:wrap;gap:7px}.chip{background:#13121c;border:1px solid #3b3547;padding:7px 12px;color:var(--muted);font-size:10px;min-height:34px}.chip:hover{color:var(--text);border-color:#81708f}.chip.active{background:#2d2140;border-color:var(--purple);color:var(--purple)}.chip.all{color:var(--gold)}.search{background:#101019;color:var(--text);border:1px solid #40394e;padding:8px 12px;width:230px;min-height:36px}.search::placeholder{color:#726b80}.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.topic-card{border:1px solid var(--line);background:var(--panel);padding:19px;display:flex;flex-direction:column;text-align:left;color:var(--text);position:relative;min-height:198px;transition:border-color .15s}.topic-card:hover{border-color:var(--purple);background:#181323}.topic-card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:17px}.topic-num{font-size:18px;color:var(--purple)}.topic-card[data-group='Геометрия'] .topic-num{color:var(--cyan)}.topic-card[data-group='Практика'] .topic-num{color:var(--gold)}.topic-card[data-group='Часть 2'] .topic-num{color:var(--red)}.topic-card h2{font-size:12px;margin-bottom:8px}.topic-card p{color:var(--muted);font-size:10px;line-height:1.9;margin-bottom:14px}.topic-meta{display:flex;justify-content:space-between;align-items:center;font-size:9px;margin-top:auto;gap:10px;color:var(--muted)}.topic-card .progress{height:3px;margin-top:12px}.config-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px}.form-section+.form-section{margin-top:25px;padding-top:24px;border-top:1px solid var(--line)}.form-label{display:block;font-size:11px;font-weight:bold;margin-bottom:12px}.section-number{color:var(--purple);margin-right:10px}.field{display:flex;flex-direction:column;gap:7px;margin-bottom:15px}.field label{font-size:11px;color:var(--muted)}.field input,.field select,select.control{background:#0d0c15;color:var(--text);border:1px solid #484052;padding:10px 12px;min-height:42px}.slot-picker{display:grid;grid-template-columns:repeat(9,1fr);gap:7px}.slot-picker button{padding:8px 4px;min-width:0}.setup-summary{border:1px solid #5e447e;background:#1e172c;padding:24px;align-self:start;position:sticky;top:20px}.setup-summary h2{font-size:16px;margin:15px 0}.setup-summary .summary-line{display:flex;justify-content:space-between;border-bottom:1px solid #3d314e;padding:12px 0;font-size:10px;color:var(--muted);gap:10px}.summary-line b{color:var(--text);text-align:right;font-weight:normal}.setup-summary .btn{width:100%;margin-top:24px}.setup-summary .save-star{font-size:33px}.info-box{font-size:10px;color:var(--muted);padding:14px 16px;background:#191823;border-left:2px solid #71628e;line-height:1.9;margin:18px 0}.training-layout{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:22px;align-items:start}.task-header{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:20px;flex-wrap:wrap}.task-header .tag{font-size:9px}.session-count{font-size:11px;color:var(--muted)}.session-count b{color:var(--text);font-size:18px}.task-card{border:2px solid #b7aec7;background:#101018;padding:27px}.task-number-label{color:var(--purple);font-size:10px;letter-spacing:1px;display:flex;align-items:center;gap:9px}.task-card h2{font-size:17px;margin:12px 0 18px}.question-text{white-space:pre-line;font-size:16px;line-height:1.95;letter-spacing:-.2px;font-family:Arial,'Segoe UI',sans-serif;color:#f6f3fc}.context-box{border:1px solid #4b3b5e;background:#1d1628;margin:0 0 20px;padding:14px 16px}.context-box summary{font-size:11px;color:var(--purple);cursor:pointer}.context-box p{font-family:Arial,sans-serif;font-size:14px;line-height:1.8;margin-top:10px;color:#ded5ea}.task-table{width:100%;border-collapse:collapse;font-family:Arial,sans-serif;font-size:13px;margin:15px 0 20px}.task-table td,.task-table th{border:1px solid #555061;padding:8px;text-align:center}.task-table th{background:#24212d}.diagram{max-width:480px;margin:23px auto;background:white;padding:8px}.diagram svg,.diagram img{display:block;width:100%;height:auto}.diagram.img-7{max-width:420px}.diagram.img-18{max-width:250px}.answer-options{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:24px 0}.option{border:1px solid #4b4258;background:#181420;text-align:left;padding:12px 15px;font-size:13px;line-height:1.7;display:flex;gap:12px;align-items:center}.option b{color:var(--muted)}.option.selected{border-color:var(--gold);color:var(--gold);background:#2a231b}.answer-form{display:flex;align-items:stretch;gap:12px;margin-top:26px}.answer-input{background:#08080f;border:2px solid #8b7a9f;color:white;padding:12px 15px;font-size:18px;width:220px;min-width:0}.answer-input::placeholder{font-size:12px;color:#746981}.answer-hint{font-size:10px;color:var(--muted);margin-top:10px}.task-tools{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:20px;flex-wrap:wrap}.task-tools .btn{font-size:10px;min-height:34px}.hint-box{padding:15px;border:1px solid #665233;background:#241d14;font-family:Arial,sans-serif;font-size:14px;line-height:1.8;margin-top:18px;color:#eadabb}.hint-box b{font-family:var(--font);font-size:10px;display:block;color:var(--gold);margin-bottom:6px}.solution{margin-top:22px;border-top:1px solid #403749;padding-top:21px}.solution h3{font-size:11px;color:var(--cyan);margin-bottom:16px}.solution ol{font-family:Arial,sans-serif;font-size:15px;line-height:1.9;padding-left:23px;margin:0}.solution li{padding-left:5px;margin-bottom:10px}.correct-answer{font-family:var(--font);padding:13px 15px;border:1px solid #324d49;background:#142321;color:var(--cyan);margin:18px 0;font-size:13px}.feedback{display:flex;align-items:flex-start;gap:12px;margin-top:25px;padding:16px;border:1px solid #466859;background:#14261e}.feedback.wrong{border-color:#75454e;background:#2a171c}.feedback.assisted{border-color:#715d36;background:#282113}.feedback h3{font-size:12px;line-height:1.6}.feedback p{font-size:10px;color:#b8b4c1;margin-top:5px}.feedback .icon{color:var(--green)}.feedback.wrong .icon{color:var(--red)}.session-side .panel{padding:20px}.session-side h3{font-size:11px;margin-bottom:16px}.question-dots{display:flex;gap:7px;flex-wrap:wrap}.question-dot{width:25px;height:25px;display:grid;place-items:center;font-size:10px;border:1px solid #494052;color:var(--muted)}.question-dot.current{border-color:var(--gold);color:var(--gold)}.question-dot.correct{background:#193329;border-color:#47705d;color:var(--green)}.question-dot.wrong{background:#361d27;border-color:#734454;color:var(--red)}.session-side .side-line{display:flex;justify-content:space-between;margin:15px 0;font-size:10px;color:var(--muted)}.session-side .side-line b{font-weight:normal;color:var(--text)}.quote-box{margin-top:20px;border:1px solid #483555;background:#1c1526;padding:17px;font-size:10px;line-height:1.9;color:#bca4d8}.quote-box .pixel-heart{color:var(--red);width:12px;height:12px;margin-right:7px}.notes-label{font-size:11px;color:var(--muted);display:block;margin:20px 0 10px}.notes{width:100%;min-height:145px;resize:vertical;background:#090910;color:var(--text);border:1px solid #70617c;padding:13px;font-family:Arial,sans-serif;font-size:15px;line-height:1.8}.manual-rubric{border:1px solid #5a4a2b;padding:15px;margin-top:20px;background:#211d14;font-size:11px;line-height:1.9}.manual-rubric b{color:var(--gold)}.score-buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:17px}.score-buttons .btn{display:flex;flex-direction:column;font-size:12px;gap:4px;padding:10px 6px}.score-buttons small{font-size:9px;font-weight:normal;color:var(--muted)}.empty{border:1px dashed #4d415e;background:#14101c;padding:55px 30px;text-align:center}.empty .big-icon{font-size:40px;color:var(--purple);margin-bottom:17px}.empty h2{font-size:18px;margin-bottom:10px}.empty p{color:var(--muted);font-size:12px;max-width:480px;margin:0 auto 22px;line-height:1.9}.mistake-list{display:flex;flex-direction:column;gap:13px}.mistake-card{border:1px solid var(--line);background:var(--panel);padding:20px;display:flex;justify-content:space-between;align-items:center;gap:25px}.mistake-card .question-preview{font-family:Arial,sans-serif;color:#d0c9db;font-size:14px;margin:8px 0;max-width:650px;line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.mistake-card h2{font-size:12px}.mistake-card .meta{font-size:9px;color:var(--muted)}.table-scroll{overflow-x:auto}.stats-table{width:100%;border-collapse:collapse;white-space:nowrap;font-size:11px}.stats-table th{text-align:left;font-size:9px;letter-spacing:.7px;color:var(--muted);font-weight:normal;border-bottom:1px solid #4a3b59;padding:13px 12px}.stats-table td{padding:14px 12px;border-bottom:1px solid #2b2435}.stats-table td:first-child{color:var(--purple)}.stats-table .bar-cell{min-width:120px}.stats-table .progress{width:100px;height:4px;margin-top:7px}.stats-chart{display:flex;gap:12px;align-items:flex-end;min-height:155px;padding-top:15px}.chart-column{flex:1;text-align:center;display:flex;flex-direction:column;align-items:center;gap:8px;min-width:0}.chart-bar{width:50%;min-width:15px;max-width:42px;background:var(--purple);min-height:2px;border-top:2px solid #d2b7ff}.chart-column span,.chart-column b{font-size:10px;color:var(--muted);font-weight:normal}.stats-panels{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:20px 0}.accuracy-meter{margin-top:28px}.accuracy-meter .progress{height:12px;margin:14px 0}.accuracy-caption{font-size:10px;line-height:1.9;color:var(--muted)}.achievement-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.badge-card{border:1px solid var(--line);background:var(--panel);padding:25px;position:relative}.badge-card .badge-icon{width:52px;height:52px;display:grid;place-items:center;background:#24202f;border:1px solid #514360;color:#6e627e;margin-bottom:20px}.badge-card .badge-icon .icon{width:25px;height:25px}.badge-card.unlocked{border-color:#6a5933;background:#1b1813}.badge-card.unlocked .badge-icon{color:var(--gold);border-color:#8a6e35;background:#352b17}.badge-card h2{font-size:13px;margin-bottom:9px}.badge-card p{font-size:10px;color:var(--muted);min-height:40px;margin-bottom:18px;line-height:1.9}.badge-card .progress{height:4px}.badge-card .badge-progress{font-size:9px;color:var(--muted);display:flex;justify-content:space-between;margin-top:8px}.badge-card .badge-check{position:absolute;top:20px;right:20px;color:var(--gold)}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.settings-grid .panel h2{margin-bottom:20px;font-size:14px}.settings-grid .panel p{font-size:11px;line-height:1.9;color:var(--muted);margin-bottom:18px}.settings-grid .full{grid-column:1/-1}.source-list{margin:15px 0 0;padding-left:20px;color:var(--muted);font-size:11px;line-height:2.1}.source-list a{color:var(--cyan)}.finish{max-width:760px;margin:auto;text-align:center}.finish .rune{width:100px;height:100px;color:var(--purple);margin:0 auto 20px}.finish h1{margin:15px 0}.finish .stats-strip{text-align:left;margin:28px 0}.finish .stats-strip .stat{padding:17px}.finish .finish-message{border:2px solid #cab5e4;background:#171020;padding:20px;text-align:left;font-size:13px;line-height:1.9;margin:25px 0}.finish .actions{justify-content:center}.result-list{text-align:left;margin-top:28px}.result-line{padding:12px 0;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line);font-size:11px}.result-line .result-status{margin-left:auto;color:var(--muted);font-size:10px}.status-error{color:var(--red)!important}.status-correct{color:var(--green)!important}.dialog{max-width:480px}.dialog h2{font-size:16px;margin-bottom:15px}.dialog p{font-size:12px;color:var(--muted);margin-bottom:25px;line-height:1.9}dialog{padding:27px;background:var(--panel);color:var(--text);border:2px solid #b99ed5;max-width:min(500px,calc(100% - 40px))}dialog::backdrop{background:#000b}#toast{position:fixed;bottom:24px;left:calc(50% + 113px);transform:translateX(-50%) translateY(30px);padding:13px 20px;background:#261c33;border:1px solid var(--purple);color:var(--text);font-size:11px;z-index:100;max-width:calc(100vw - 40px);opacity:0;transition:.2s;pointer-events:none;box-shadow:4px 4px 0 #0008}#toast.visible{opacity:1;transform:translateX(-50%) translateY(0)}.storage-warning{padding:14px;border:1px solid var(--red);color:var(--red);font-size:11px;margin-bottom:20px}.recent{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:10px}.keyboard{font-size:9px;border:1px solid #5b4c6e;padding:2px 5px;color:var(--muted)}
@keyframes beat{0%,95%,100%{transform:scale(1)}96%{transform:scale(1.1)}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media(min-width:1550px){.main{padding-top:40px}.hero{min-height:275px}.hero h2{font-size:27px}.mini-map{gap:11px}}
@media(max-width:1200px){.sidebar{width:200px;padding:26px 15px}.shell{margin-left:200px}.topbar{padding:0 25px}.main{padding:26px 25px}.hero{padding:23px}.hero h2{font-size:20px}.hero-emblem{width:130px;height:130px;right:10px;top:52px}.hero-emblem .pixel-heart{left:52px;top:41px;width:28px;height:28px}.dashboard-top,.dashboard-middle{grid-template-columns:minmax(0,1fr) 250px}.mini-map{grid-template-columns:repeat(8,1fr)}.stat{padding:16px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.training-layout{grid-template-columns:minmax(0,1fr) 225px}.config-grid{grid-template-columns:minmax(0,1fr) 260px}.slot-picker{grid-template-columns:repeat(7,1fr)}#toast{left:calc(50% + 100px)}}
@media(max-width:960px){.sidebar{width:75px;padding:22px 10px}.brand{padding:3px 12px 29px}.brand>div,.nav-label,.nav button>span,.sidebar-bottom,.nav .count{display:none}.nav button{justify-content:center;padding:13px 8px}.nav button.active:before{left:-11px}.shell{margin-left:75px}.dashboard-top,.dashboard-middle{grid-template-columns:minmax(0,1fr) 250px}.hero-copy{max-width:100%}.hero-emblem{opacity:.18;right:10px;top:20px;width:180px;height:180px}.hero h2{font-size:21px}.hero p{max-width:90%}.mini-map{grid-template-columns:repeat(7,1fr)}.training-layout{grid-template-columns:1fr}.session-side{display:none}.config-grid{grid-template-columns:1fr 250px}.settings-grid{grid-template-columns:1fr}.achievement-grid{grid-template-columns:repeat(2,1fr)}#toast{left:calc(50% + 37px)}}
@media(max-width:720px){.sidebar{inset:auto 0 0 0;width:100%;height:64px;padding:5px 10px;background:#0c0b13f5;border:0;border-top:1px solid #484051;flex-direction:row}.brand{display:none}.nav{flex-direction:row;width:100%;justify-content:space-around;gap:2px}.nav button{flex:1;min-width:0;flex-direction:column;gap:3px;padding:5px 2px;font-size:7px;min-height:49px}.nav button>span{display:block;font-size:8px}.nav button.active:before{display:none}.nav button .icon{width:18px;height:18px}.nav button[data-route='settings']{display:none}.shell{margin-left:0;padding-bottom:64px}.topbar{height:63px;padding:0 18px}.breadcrumb{display:none}.mobile-brand{display:flex;align-items:center;gap:9px;font-size:10px;letter-spacing:.5px}.mobile-brand .pixel-heart{color:var(--red);width:18px;height:18px}.top-right{gap:12px;font-size:9px}.saved-label{font-size:0}.saved-label:before{width:6px;height:6px}.main{padding:23px 18px 30px}.page-head{align-items:flex-start;margin-bottom:22px}h1{font-size:20px}.page-head>.tag{display:none}.eyebrow{font-size:9px}.subtext{font-size:10px}.dashboard-top,.dashboard-middle{grid-template-columns:1fr;gap:16px}.hero{min-height:250px;padding:24px 21px}.hero h2{font-size:22px}.hero-copy{max-width:100%}.hero p{font-size:10px;max-width:90%}.hero-emblem{right:0;top:20px;width:200px;height:200px;opacity:.2}.hero .actions{margin-top:23px;gap:10px}.hero .btn{padding:10px 12px;font-size:9px}.player-card{display:none}.stats-strip{grid-template-columns:repeat(2,1fr);margin:16px 0}.stat{padding:15px 17px}.stat:nth-child(2){border-right:0}.stat:nth-child(-n+2){border-bottom:1px solid var(--line)}.stat-top{font-size:9px}.stat-value{font-size:23px}.mini-map{grid-template-columns:repeat(8,1fr);gap:7px}.map-node{font-size:12px}.panel{padding:20px}.dashboard-middle>.panel:last-child{display:grid;grid-template-columns:1fr 100px;gap:0 18px}.daily-top{grid-column:1/-1;margin-bottom:0}.goal-ring{grid-column:2;grid-row:2/4;width:88px;height:88px;margin:15px 0 0}.goal-ring b{font-size:19px}.week{grid-column:1;grid-row:2;margin-top:22px;gap:4px}.daily-note{grid-column:1;grid-row:3;font-size:9px;margin-top:10px}.next-mission{padding:18px;align-items:flex-start;gap:12px}.next-mission .mission-copy{gap:11px}.mission-copy h3{font-size:10px}.mission-copy p{font-size:9px}.mission-copy .icon{display:none}.next-mission .btn{font-size:9px;white-space:nowrap;padding:9px 10px}.footer-note{font-size:8px;margin-top:24px}.toolbar{gap:13px}.chips{gap:6px}.chip{font-size:9px;padding:6px 9px;min-height:33px}.search{width:100%;font-size:11px}.topic-grid{grid-template-columns:1fr 1fr;gap:10px}.topic-card{padding:14px;min-height:205px}.topic-card h2{font-size:11px}.topic-card-top{margin-bottom:12px}.topic-num{font-size:16px}.topic-card .tag{font-size:8px;padding:3px 5px}.topic-card p{font-size:9px}.topic-meta{font-size:8px}.config-grid{grid-template-columns:1fr;gap:16px}.setup-summary{position:static;padding:20px}.setup-summary .save-star{display:none}.setup-summary h2{margin-top:0;font-size:14px}.setup-summary .summary-line{padding:9px 0}.setup-summary .btn{margin-top:20px}.slot-picker{grid-template-columns:repeat(8,1fr)}.task-card{padding:19px 16px}.task-card h2{font-size:16px}.task-header{gap:10px}.task-header .tag{font-size:8px}.question-text{font-size:17px;line-height:1.85}.answer-form{gap:9px;flex-wrap:wrap}.answer-input{flex:1;width:150px;font-size:17px}.answer-form>.btn{font-size:10px;padding:10px}.answer-options{grid-template-columns:1fr}.option{font-size:14px}.task-tools .btn{font-size:9px}.task-table{font-size:11px}.task-table td,.task-table th{padding:5px}.context-box p{font-size:14px}.score-buttons .btn{font-size:11px}.score-buttons small{font-size:8px}.mistake-card{padding:17px;gap:10px;align-items:flex-start}.mistake-card .btn{font-size:9px;padding:9px;white-space:nowrap}.mistake-card h2{font-size:11px}.mistake-card .question-preview{font-size:13px}.stats-panels{grid-template-columns:1fr}.achievement-grid{gap:12px}.badge-card{padding:19px 16px}.badge-card h2{font-size:11px}.badge-card p{font-size:9px;min-height:50px}.badge-card .badge-icon{width:42px;height:42px}.settings-grid{grid-template-columns:1fr}.finish .stats-strip{grid-template-columns:repeat(2,1fr)}.finish .actions .btn{width:100%}#toast{left:50%;bottom:80px;font-size:10px;width:max-content;max-width:calc(100vw - 36px)}.finish .rune{width:80px;height:80px}.finish h1{font-size:21px}.result-line{font-size:10px}.result-line .result-status{font-size:9px}.page-head .btn{font-size:9px;padding:9px}.page-head .actions{gap:6px}}
@media(max-width:380px){.main{padding:20px 13px}.topic-grid{grid-template-columns:1fr}.mini-map{grid-template-columns:repeat(7,1fr)}.hero h2{font-size:20px}.slot-picker{grid-template-columns:repeat(6,1fr)}.nav button>span{font-size:7px}.topbar{padding:0 13px}.achievement-grid{grid-template-columns:1fr}}
@font-face{font-family:SavePixel;src:url('assets/save-pixel.woff') format('woff');font-style:normal;font-weight:400 800;font-display:swap}.brand b,.hero h2,.finish h1{font-family:SavePixel,var(--font);font-weight:normal}.brand b{font-size:15px;line-height:1.5;letter-spacing:1px}.hero h2{font-size:27px;line-height:1.5;letter-spacing:1px}.hero-emblem{opacity:.9}@media(max-width:1200px){.hero h2{font-size:23px}}@media(max-width:960px){.hero-emblem{opacity:.18}}@media(max-width:720px){.hero h2{font-size:25px}.hero-emblem{opacity:.22}.brand b{font-size:14px}}
/* Original conditions preserve native MathML and diagrams. */
.bank-condition{background:#fff;color:#16131f;border-radius:3px;padding:24px;margin:20px 0;font:18px/1.65 Georgia,'Times New Roman',serif;overflow-x:auto;overflow-wrap:anywhere}
.bank-condition math{font-family:math;font-size:1.15em;color:#16131f}
.bank-condition img{display:inline-block;max-width:100%;height:auto;vertical-align:middle;background:white}
.bank-condition table{border-collapse:collapse;max-width:100%;margin:12px 0}
.bank-condition td,.bank-condition th{border:1px solid #9a97a0;padding:7px 12px;vertical-align:middle}
.bank-condition p{font:inherit;color:inherit;margin:10px 0}.bank-options{padding-left:30px}.bank-options li{padding:8px 0}.align-center{text-align:center}
.bank-source{font:11px/1.6 system-ui;color:var(--muted);margin:12px 0 24px}.bank-source a{color:var(--cyan)}
.exam-modes{display:grid;grid-template-columns:1fr 1fr;gap:24px}.exam-modes .panel{padding:32px;display:flex;flex-direction:column;align-items:flex-start;gap:12px}.exam-modes p{line-height:1.8;flex:1}.resume-panel,.exam-summary{margin-bottom:24px}.resume-panel p,.exam-summary p{line-height:1.8}
.exam-top{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:28px}.exam-top h1{margin:12px 0}.exam-clock{font:22px SavePixel,monospace;white-space:nowrap}.exam-nav{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.exam-nav .question-dot{width:100%;height:40px;cursor:pointer;font:inherit}.question-dot.answered{border-color:var(--purple);background:#312044}.exam-input{display:block;margin:14px 0;width:min(100%,420px)}.exam-controls{margin-top:28px}.bank-metric{margin:20px 0;display:flex;gap:24px;flex-wrap:wrap}.bank-metric b{color:var(--cyan)}
@media(max-width:700px){.exam-modes{grid-template-columns:1fr}.exam-top{align-items:flex-start;flex-direction:column}.bank-condition{padding:16px;font-size:17px}.exam-modes .panel{padding:22px}}
.account-screen{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px;background:radial-gradient(ellipse at 50% 30%,#261336 0,#0b0910 60%)}.account-card{width:min(100%,520px);padding:40px;border:2px solid #d8cae6;background:#100d17;box-shadow:8px 8px 0 #271738}.account-stars{font-size:30px;letter-spacing:20px;color:var(--gold);margin:0 0 30px 20px}.account-card h1{font-family:SavePixel,var(--font);font-weight:normal;font-size:24px;line-height:1.6;margin:22px 0}.account-card .subtext{margin:0 0 24px}.nickname-input{width:100%;margin-top:10px;font-size:18px}.account-card .btn.primary{width:100%;justify-content:center;margin:20px 0}.account-card .tiny{line-height:1.8;margin:18px 0}.account-footer{font-size:9px;line-height:1.8;color:var(--muted);margin-top:30px}.legacy-import{display:flex;align-items:flex-start;gap:10px;font:12px/1.8 system-ui;margin-top:20px}.legacy-import input{margin-top:5px;accent-color:var(--purple)}.form-error{color:#ff9cbd;font:13px/1.8 system-ui;margin:16px 0}.profile-warning .actions{margin-top:12px}a.btn{text-decoration:none}input[readonly]{opacity:.8}.account-card .small-link{font-size:12px}@media(max-width:600px){.account-card{padding:26px 22px}.account-card h1{font-size:21px}.account-screen{padding:24px 16px}}
.teaching-section{margin-top:26px}.teaching-create,.teaching-join{margin:22px 0}.inline-form{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:16px}.inline-form input{flex:1;min-width:180px}.inline-form select{width:auto}.inline-form .btn{flex-shrink:0}.teaching-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:22px 0}.teaching-groups .panel{display:flex;flex-direction:column;align-items:flex-start;gap:16px}.teaching-groups h2{font-size:15px;line-height:1.8}.teaching-groups .subtext{flex:1}.invite-panel,.assignment-publish{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:24px}.invite-code{display:block;font:24px/1.5 SavePixel,monospace;color:var(--cyan);letter-spacing:2px;margin:14px 0;overflow-wrap:anywhere}.teaching-chart{gap:6px}.teaching-chart .chart-bar{min-width:8px}.teaching-chart .chart-column span{font-size:9px}.composer-fields{display:grid;grid-template-columns:2fr 1.5fr 1fr;gap:16px}.composer-fields input,.composer-fields select{width:100%}.composer-list{display:flex;flex-direction:column;gap:16px;margin:24px 0}.composer-task .question-preview{font:14px/1.8 system-ui;color:var(--muted);margin:16px 0}.composer-task details>summary,.composer-list details>summary{color:var(--cyan);cursor:pointer;font:12px/1.8 system-ui;margin:16px 0}.assignment-card .tag{font-size:9px}.submitted-answer{white-space:pre-wrap;overflow-wrap:anywhere;padding:18px;border:1px solid var(--line);font:16px/1.8 system-ui;background:#15101e}.sidebar .nav{overflow-y:auto;min-height:0}.sidebar-bottom{flex-shrink:0}@media(max-width:800px){.teaching-groups{grid-template-columns:1fr}.composer-fields{grid-template-columns:1fr}.invite-panel,.assignment-publish{flex-direction:column;align-items:flex-start}.invite-code{font-size:19px}.inline-form .btn{width:100%}.composer-task .panel-head{flex-direction:column;align-items:flex-start;gap:10px}}

/* Appearance is a profile preference; all study components share these tokens. */
:root { color-scheme: dark; }
:root[data-theme='black-hole'] {
  --bg:#05080f; --panel:#101824; --panel2:#152132; --line:#2b3d52;
  --text:#edf6ff; --muted:#a3b3c6; --purple:#aab5ff; --cyan:#8ae6ee;
  --gold:#ffd5a3; --red:#ff8099; --orange:#ffbc7d; --green:#9de3bd;
  --font:'Trebuchet MS',system-ui,sans-serif;
  --chrome:#080e18; --hover:#17263c; --active:#1a2545; --track:#253149;
  --hero:radial-gradient(ellipse at 90% 55%,#34304e 0,transparent 49%),linear-gradient(120deg,#111b2c,#080e18);
  --hero-border:#526284; --button-shadow:#61462e;
}
:root[data-theme='dark-souls'] {
  --bg:#0d0c0a; --panel:#191611; --panel2:#211d15; --line:#494032;
  --text:#eee7d7; --muted:#b1a795; --purple:#d5b36d; --cyan:#adc5b5;
  --gold:#e7c078; --red:#f08470; --orange:#f3a354; --green:#b2c88a;
  --font:'Segoe UI',system-ui,sans-serif;
  --chrome:#100f0c; --hover:#292318; --active:#302717; --track:#363021;
  --hero:radial-gradient(ellipse at 88% 100%,#55301a 0,transparent 58%),linear-gradient(110deg,#252118,#15120e);
  --hero-border:#79633d; --button-shadow:#633a20;
}
html[data-theme='black-hole'] body {
  background-image:radial-gradient(ellipse at 90% 0,#19244588,transparent 65%);
  background-attachment:fixed;
}
html[data-theme='dark-souls'] body {
  background-image:radial-gradient(ellipse at 50% 0,#3a2c1644,transparent 65%);
  background-attachment:fixed;
}
html[data-theme]:not([data-theme='undertale']) .sidebar,
html[data-theme]:not([data-theme='undertale']) .topbar { background:var(--chrome); border-color:var(--line); }
html[data-theme]:not([data-theme='undertale']) :is(.save-panel,.tag,.map-node,.day-square,.task-card,.question-dot,.option-btn) { background:var(--panel); border-color:var(--line); }
html[data-theme]:not([data-theme='undertale']) :is(.field input,.field select,select.control,.answer-input,.solution-notes,.search-input) { background:var(--bg); color:var(--text); border-color:var(--line); }
html[data-theme]:not([data-theme='undertale']) :is(.nav button:hover,.topic-card:hover,.map-node:hover,.option-btn:hover) { background:var(--hover); }
html[data-theme]:not([data-theme='undertale']) :is(.nav button.active,.map-node.training,.week-day.done .day-square,.avatar) { background:var(--active); border-color:var(--purple); }
html[data-theme]:not([data-theme='undertale']) .progress { background:var(--track); }
html[data-theme]:not([data-theme='undertale']) .hero { background:var(--hero); border-color:var(--hero-border); }
html[data-theme]:not([data-theme='undertale']) .hero:after { background-image:radial-gradient(#ffffff30 .6px,transparent .6px); background-size:26px 26px; }
html[data-theme]:not([data-theme='undertale']) .hero :is(.eyebrow,h2) { color:var(--text); }
html[data-theme]:not([data-theme='undertale']) .hero p { color:var(--muted); }
html[data-theme]:not([data-theme='undertale']) :is(.next-mission,.info-box,.tag.author,.tag.fipi,.tag.manual,.feedback,.question-meta) { background:var(--panel2); border-color:var(--line); }
html[data-theme]:not([data-theme='undertale']) .btn.primary { box-shadow:3px 3px 0 var(--button-shadow); }
html[data-theme]:not([data-theme='undertale']) .btn.primary:hover { background:var(--hover); }
html[data-theme]:not([data-theme='undertale']) :is(dialog,#toast,.account-card) { background:var(--panel); border-color:var(--purple); }
html[data-theme]:not([data-theme='undertale']) .account-screen { background:var(--hero); }
html[data-theme]:not([data-theme='undertale']) .account-card { box-shadow:8px 8px 0 var(--active); }
html[data-theme]:not([data-theme='undertale']) :is(.footer-note,.footer-note a,.nav-label) { color:var(--muted); }
html[data-theme='black-hole'] :is(.brand b,.hero h2,.finish h1,.account-card h1) { font-family:'Trebuchet MS',system-ui,sans-serif; font-weight:600; }
html[data-theme='black-hole'] .hero h2 { letter-spacing:1.5px; }
html[data-theme='dark-souls'] :is(.brand b,.hero h2,.finish h1,.account-card h1) { font-family:Georgia,'Times New Roman',serif; font-weight:normal; }
html[data-theme='dark-souls'] .hero h2 { letter-spacing:1.3px; text-shadow:0 2px 18px #c37a3338; }
html[data-theme='dark-souls'] .hero:after { background-size:37px 43px; background-image:radial-gradient(#edab7140 1px,transparent 1px); }
html[data-theme='dark-souls'] .hero .floating-star { color:#be8b52; opacity:.5; }
html[data-theme='dark-souls'] :is(.brand b,.panel-head h2) { letter-spacing:1.2px; }
.theme-mark { display:inline-block; width:20px; height:20px; vertical-align:middle; flex-shrink:0; }
.theme-mark:not(.pixel-heart) { fill:none; stroke:currentColor; stroke-width:1.4; stroke-linecap:round; stroke-linejoin:round; }
.black-hole-mark circle { fill:var(--bg); }
.bonfire-mark .mark-flame { fill:currentColor; opacity:.5; stroke:none; }
.brand .theme-mark { width:29px; height:29px; color:var(--orange); }
.mobile-brand .theme-mark { width:18px; height:18px; color:var(--orange); }
.brand .pixel-heart,.mobile-brand .pixel-heart { color:var(--red); }
.theme-footer { display:inline-flex; align-items:center; gap:7px; }
.theme-footer .theme-mark { width:12px; height:12px; color:var(--gold); }
.theme-art { width:100%; height:100%; overflow:visible; }
.orbit-grid { fill:none; stroke:#7185ab; stroke-width:.7; opacity:.4; }
.orbit-grid circle:first-child { stroke-dasharray:2 5; }
.bh-halo { fill:none; stroke:#aab5ff; stroke-width:14; opacity:.3; filter:blur(5px); }
.bh-disk { fill:none; stroke:#aab5ff; stroke-width:2; }
.bh-shadow { fill:#020305; }
.bh-photon { fill:none; stroke:#ffd5a3; stroke-width:2.8; filter:drop-shadow(0 0 5px #f5b678); }
.bh-front { fill:none; stroke:#8ae6ee; stroke-width:1.6; }
.bh-core { fill:none; stroke:#fff5df; stroke-width:1.5; }
.ash-ring { fill:none; stroke:#88724c; stroke-width:.7; stroke-dasharray:90 10 4 9; opacity:.65; }
.ruins { fill:none; stroke:#a19172; stroke-width:1.2; opacity:.25; }
.ember-ground { fill:#b9652c; opacity:.3; filter:blur(5px); }
.bonfire-flame { transform-origin:80px 130px; animation:ember-glow 5s ease-in-out infinite; }
.flame-back { fill:#b94f29; opacity:.8; }
.flame-front { fill:#e9a04b; filter:drop-shadow(0 0 8px #e9913f66); }
.bonfire-logs { fill:none; stroke:#9b7750; stroke-width:4; stroke-linecap:round; }
.sword-blade { fill:#b0b4a7; stroke:#eee7d7; stroke-width:.6; }
.sword-hilt { fill:#97764d; stroke:#d5b36d; stroke-width:.7; }
.sword-etch { fill:none; stroke:#585b52; stroke-width:1; }
.embers { fill:none; stroke:#edb76d; stroke-width:1.8; stroke-linecap:round; }
.finish .rune { position:relative; }
.finish .rune .pixel-heart { position:absolute; width:22%; height:22%; top:33%; left:40%; color:var(--red); }
@keyframes ember-glow { 0%,100% { opacity:.75; } 50% { opacity:1; } }
.theme-section .panel-head { margin-bottom:8px; }
.theme-picker { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px; }
.theme-choice {
  --preview-bg:#11101d; --preview-accent:#ac86ff; --preview-second:#ff4a62; --preview-third:#ffc953;
  display:flex; flex-direction:column; padding:0; min-width:0; text-align:left;
  background:var(--panel); color:var(--text); border:1px solid var(--line);
  position:relative; transition:border-color .15s,box-shadow .15s;
}
.theme-choice[data-theme='black-hole'] { --preview-bg:#091222; --preview-accent:#aab5ff; --preview-second:#8ae6ee; --preview-third:#ffd5a3; }
.theme-choice[data-theme='dark-souls'] { --preview-bg:#201b13; --preview-accent:#d5b36d; --preview-second:#c67338; --preview-third:#adc5b5; }
.theme-choice:hover { border-color:var(--purple); }
.theme-choice.selected { border-color:var(--purple); box-shadow:inset 0 0 0 1px var(--purple); }
.theme-preview { position:relative; width:100%; height:145px; display:grid; place-items:center; background:radial-gradient(ellipse at 50% 100%,#ffffff0a,transparent),var(--preview-bg); overflow:hidden; }
.theme-preview :is(.theme-art,.rune-svg) { width:126px; height:126px; color:var(--preview-accent); }
.theme-preview .pixel-heart { position:absolute; width:28px; height:28px; top:45px; left:calc(50% - 14px); color:#ff4a62; }
.theme-preview-line { position:absolute; bottom:12px; left:18px; right:18px; height:1px; background:linear-gradient(90deg,transparent,var(--preview-accent),transparent); opacity:.4; }
.theme-choice-copy { display:flex; flex:1; flex-direction:column; padding:17px 18px; gap:10px; }
.theme-choice-title { font-size:14px; line-height:1.5; font-weight:bold; }
.theme-choice-description { color:var(--muted); font-size:11px; line-height:1.8; flex:1; }
.theme-choice-bottom { display:flex; align-items:center; justify-content:space-between; gap:10px; margin-top:8px; font-size:9px; color:var(--purple); }
.theme-swatches { display:flex; gap:5px; }
.theme-swatches i { display:block; width:10px; height:10px; background:var(--preview-accent); }
.theme-swatches i:nth-child(2) { background:var(--preview-second); }
.theme-swatches i:nth-child(3) { background:var(--preview-third); }
@media(max-width:720px) {
  .theme-picker { grid-template-columns:1fr; gap:12px; }
  .theme-choice { flex-direction:row; align-items:stretch; }
  .theme-preview { width:100px; min-width:100px; height:auto; min-height:145px; }
  .theme-preview :is(.theme-art,.rune-svg) { width:88px; height:100px; }
  .theme-preview .pixel-heart { width:19px; height:19px; left:calc(50% - 9px); top:calc(50% - 16px); }
  .theme-choice-copy { padding:15px 13px; }
  .theme-section .panel-head { align-items:flex-start; }
  .theme-section .panel-head .tag { display:none; }
  .theme-choice-title { font-size:13px; }
  html[data-theme='black-hole'] .hero h2 { font-size:24px; letter-spacing:.7px; }
  html[data-theme='dark-souls'] .hero h2 { font-size:27px; }
}
@media(prefers-reduced-motion:reduce) { .bonfire-flame { animation:none; } }
.registration-themes { margin:24px 0 18px; padding:0; border:0; min-width:0; }
.registration-themes legend { font-size:10px; color:var(--muted); letter-spacing:1px; padding:0 0 12px; }
.registration-theme-options { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:8px; }
.registration-theme { display:flex; flex-direction:column; align-items:center; gap:8px; padding:10px 6px; border:1px solid var(--line); color:var(--text); background:var(--panel2); min-width:0; font-size:10px; line-height:1.6; text-align:center; }
.registration-theme:hover,.registration-theme.selected { border-color:var(--purple); }
.registration-theme.selected { box-shadow:inset 0 0 0 1px var(--purple); }
.registration-theme-art { position:relative; display:block; width:65px; height:65px; color:var(--purple); }
.registration-theme-art .pixel-heart { position:absolute; width:15px; height:15px; top:21px; left:26px; color:#ff4a62; }
.registration-theme-status { color:var(--purple); font-size:8px; margin-top:auto; }
.account-card .registration-themes .answer-hint { margin:10px 0 0; font-size:10px; }

/* Modern: a neutral, readable fourth appearance. Existing profiles keep their theme. */
:root[data-theme='modern']{color-scheme:light;--bg:#f6f7fb;--panel:#fff;--panel2:#f0edf9;--line:#dddfea;--text:#292438;--muted:#716c80;--purple:#7045d4;--cyan:#256f8d;--gold:#8f640f;--red:#bc3654;--orange:#7045d4;--green:#247953;--font:'Segoe UI',Arial,system-ui,sans-serif;--chrome:#fff;--hover:#f0ecfa;--active:#eee7fc;--track:#e6e0f1;--hero:linear-gradient(115deg,#eee8fc,#f0edf9 70%,#e8eafa);--hero-border:#ded5f0;--button-shadow:transparent}
html[data-theme='modern'] body{font-size:14px;background-image:none}
html[data-theme='modern'] :is(.brand b,.hero h2,.finish h1,.account-card h1,.exam-clock,.invite-code){font-family:var(--font);font-weight:650;letter-spacing:-.7px}
html[data-theme='modern'] h1{font-size:28px;line-height:1.25;letter-spacing:-1px}
html[data-theme='modern'] :is(.panel,.hero,.player-card,.stats-strip,.topic-card,.next-mission,.task-card,.setup-summary,.badge-card,.account-card,.save-panel,.bank-condition,.info-box,dialog,.theme-choice,.option,.feedback,.submitted-answer,.question-meta){border-radius:17px}
html[data-theme='modern'] :is(.panel,.player-card,.topic-card,.badge-card){box-shadow:0 3px 14px #31205005}
html[data-theme='modern'] :is(.btn,.control,.answer-input,.search,.field input,.field select,.solution-notes,.nav button,.map-node,.chip,.tag,.registration-theme,.option-btn,.day-square){border-radius:10px}
html[data-theme='modern'] :is(.hero h2,.brand b){font-size:25px;line-height:1.3}
html[data-theme='modern'] .brand b{font-size:16px;letter-spacing:-.5px}
html[data-theme='modern'] .hero{padding:30px;min-height:265px}
html[data-theme='modern'] .hero p{font-size:13px;line-height:1.7}
html[data-theme='modern'] .hero:after{display:none}
html[data-theme='modern'] .hero-emblem{color:#7c55ce;opacity:.85;top:40px;right:15px}
html[data-theme='modern'] .floating-star,html[data-theme='modern'] .account-stars{display:none}
html[data-theme='modern'] .sidebar{border-right:1px solid var(--line)}
html[data-theme='modern'] .nav button{font-size:12px;min-height:46px}
html[data-theme='modern'] .nav button.active:before{border-radius:10px}
html[data-theme='modern'] .avatar{border-radius:50%;width:34px;height:34px}
html[data-theme='modern'] :is(.hero .btn,.btn){letter-spacing:0;font-size:12px}
html[data-theme='modern'] .btn.primary{background:#7045d4;color:white;border:1px solid #7045d4;box-shadow:none!important}
html[data-theme='modern'] .btn.primary:hover{background:#5c33bf!important;color:white;transform:none}
html[data-theme='modern'] :is(.btn.purple-btn,.btn.danger){background:var(--panel)}
html[data-theme='modern'] :is(.tag,.tag.author,.tag.fipi,.tag.manual){background:#f0edf9;color:#68527c;border-color:#e1d9ed}
html[data-theme='modern'] :is(.map-node,.day-square,.question-dot){border-radius:9px}
html[data-theme='modern'] .map-node.master{background:#e0f1e8;border-color:#76ae91;color:#236c4b}
html[data-theme='modern'] .progress,html[data-theme='modern'] .progress>span{border-radius:20px}
html[data-theme='modern'] :is(.player-card,.stats-strip,.topic-card,.badge-card,.submitted-answer){background:white;border-color:var(--line)}
html[data-theme='modern'] :is(.chart-bar,.xp-bar){background:var(--purple)}
html[data-theme='modern'] :is(.feedback.good,.feedback.correct){background:#e8f5ec;color:#246b45;border-color:#89b59b}
html[data-theme='modern'] :is(.feedback.bad,.feedback.wrong,.form-error){color:#a32b49}
html[data-theme='modern'] :is(.option,.answer-option,.question-dot,.slot-btn,.control,.search,.nickname-input){background:var(--panel);color:var(--text);border-color:var(--line)}
html[data-theme='modern'] .account-card{box-shadow:0 24px 80px #39286012!important;border-color:var(--line)!important;max-width:650px}
html[data-theme='modern'] .account-screen{background:radial-gradient(ellipse at 20% 10%,#e8dffb,transparent 65%),#f6f7fb!important}
html[data-theme='modern'] .account-card h1{font-size:29px;line-height:1.2}
html[data-theme='modern'] :is(.chip.active,.option.selected,.slot-btn.active){background:#eee7fc;color:#6740c2;border-color:#9876dd}
html[data-theme='modern'] .bank-condition{border:1px solid var(--line)}
html[data-theme='modern'] .goal-ring{background:conic-gradient(var(--purple) calc(var(--progress)*1%),#e6e0f1 0)}
html[data-theme='modern'] .goal-ring>div{background:var(--panel)}
html[data-theme='modern'] .stat{border-color:var(--line)}
html[data-theme='modern'] :is(.tiny,.subtext,.topic-card p,.topic-meta,.daily-note,.mission-copy p){font-size:12px}
html[data-theme='modern'] :is(.panel-head h2,.daily-top h2,.mission-copy h3){font-size:13px;font-weight:600;letter-spacing:0}
html[data-theme='modern'] .registration-theme-options{gap:10px}
html[data-theme='modern'] .registration-theme{font-size:11px}
html[data-theme='modern'] .registration-theme.selected{background:#eee7fc}
.theme-choice[data-theme='modern']{--preview-bg:#f0ecfa;--preview-accent:#7751ed;--preview-second:#c5f567;--preview-third:#8dc8db}
.theme-picker{grid-template-columns:repeat(2,minmax(0,1fr))}
.registration-theme-options{grid-template-columns:repeat(2,minmax(0,1fr))}
@media(max-width:960px){html[data-theme='modern'] .hero-emblem{opacity:.15}}
@media(max-width:720px){.theme-picker{grid-template-columns:1fr}html[data-theme='modern'] .sidebar{background:#fff!important}html[data-theme='modern'] .hero{padding:24px;min-height:250px}html[data-theme='modern'] .hero h2{font-size:25px}html[data-theme='modern'] .hero-emblem{opacity:.15}html[data-theme='modern'] h1{font-size:25px}html[data-theme='modern'] .nav button>span{font-size:9px}html[data-theme='modern'] .nav button{font-size:9px;padding:5px 2px}html[data-theme='modern'] .account-card h1{font-size:25px}html[data-theme='modern'] .theme-choice-title{font-size:14px}html[data-theme='modern'] .theme-choice-description{font-size:11px}}

/* Complete the neutral palette, including empty/error/selected states. */
html[data-theme='modern']{--success-bg:#e8f5ec;--danger-bg:#fff0f3;--warning-bg:#fff6df}
html[data-theme='modern'] :is(.empty,.chip,.setup-summary,.notes,.context-box,.quote-box,.finish-message,.badge-icon){background:var(--panel);border-color:var(--line);color:var(--text)}
html[data-theme='modern'] :is(.empty,.mistake-card,.notes,.context-box,.quote-box,.finish-message,.manual-rubric,.hint-box,.correct-answer){border-radius:14px}
html[data-theme='modern'] :is(.chip:hover,.topic-card:hover,.option:hover){background:var(--hover);border-color:var(--purple)}
html[data-theme='modern'] :is(.chip.active,.option.selected,.question-dot.answered){background:var(--active);border-color:var(--purple);color:var(--purple)}
html[data-theme='modern'] :is(.question-text,.context-box p,.mistake-card .question-preview){color:var(--text)}
html[data-theme='modern'] :is(.hero p,.hero .eyebrow,.nav-label,.quote-box,.feedback p,.footer-note,.footer-note a){color:var(--muted)}
html[data-theme='modern'] :is(.hint-box,.manual-rubric,.feedback.assisted){background:var(--warning-bg);border-color:#d5b56a;color:#76551b}
html[data-theme='modern'] :is(.feedback:not(.wrong):not(.assisted),.correct-answer,.question-dot.correct){background:var(--success-bg);border-color:#89b59b;color:var(--green)}
html[data-theme='modern'] :is(.feedback.wrong,.question-dot.wrong){background:var(--danger-bg);border-color:#dc9bad;color:var(--red)}
html[data-theme='modern'] :is(.task-table td,.task-table th,.stats-table td,.stats-table th,.summary-line,.solution){border-color:var(--line)}
html[data-theme='modern'] .task-table th{background:var(--panel2)}
html[data-theme='modern'] .badge-card.unlocked{background:var(--warning-bg);border-color:#d5b56a}
html[data-theme='modern'] .badge-card.unlocked .badge-icon{background:#f8e8bb;border-color:#d5b56a;color:var(--gold)}
html[data-theme='modern'] .map-node.mastered{background:var(--success-bg);border-color:#89b59b;color:var(--green)}
html[data-theme='modern'] #toast{box-shadow:0 8px 30px #39286016;border-radius:12px}

/* Motion follows actions; no recurring page or list entrance animations. */
:root{--motion-fast:140ms;--motion-normal:210ms;--motion-ease:cubic-bezier(.2,.7,.2,1)}
:is(.btn,.chip,.nav button,.map-node,.option,.question-dot,.theme-choice,.registration-theme,.topic-card,.avatar){transition:background-color var(--motion-fast) ease,border-color var(--motion-fast) ease,color var(--motion-fast) ease,box-shadow var(--motion-fast) ease,transform var(--motion-fast) var(--motion-ease)}
:is(input,textarea,select){transition:border-color var(--motion-fast) ease,box-shadow var(--motion-fast) ease,background-color var(--motion-fast) ease}
:is(input,textarea,select):focus-visible{outline:2px solid var(--purple);outline-offset:3px}
:is(.btn,.chip,.option,.registration-theme):active:not(:disabled){transform:scale(.98)}
html[data-theme='modern'] .btn.primary:active:not(:disabled){transform:scale(.98)}
@media(hover:hover) and (pointer:fine){:is(.topic-card,.theme-choice):hover{transform:translateY(-2px)}}
dialog[open]{animation:dialog-enter var(--motion-normal) var(--motion-ease)}
dialog[open]::backdrop{animation:backdrop-enter 180ms ease-out}
#toast{transition:opacity 180ms ease,transform var(--motion-normal) var(--motion-ease)}
@keyframes dialog-enter{from{opacity:0;transform:translateY(8px) scale(.99)}to{opacity:1;transform:translateY(0) scale(1)}}
@keyframes backdrop-enter{from{opacity:0}to{opacity:1}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}:is(.btn,.chip,.option,.registration-theme,.topic-card,.theme-choice):hover,:is(.btn,.chip,.option,.registration-theme):active{transform:none!important}}
@media(max-width:720px){.dashboard-top,.dashboard-middle{grid-template-columns:minmax(0,1fr)}.dashboard-middle>.panel{min-width:0}.dashboard-middle>.panel:last-child{grid-template-columns:minmax(0,1fr) 88px;column-gap:12px}html[data-theme='modern'] .nav button>span{font-size:8px;overflow-wrap:anywhere}}