:root{color-scheme:light;font-family:Arial,Helvetica,sans-serif;font-size:17px;line-height:1.6;--navy:#102a43;--blue:#2c6e9f;--gold:#c9933f;--canvas:#f4f7f9;--ink:#152537;--muted:#4e6274;--card:#fff;--soft:#eaf3f8;--line:#bdcdd9;--accent:#245e89;--button:#245e89;--button-ink:#fff;--gold-soft:#fbf2df;--gold-ink:#765018;--good:#e8f4e9;--good-ink:#205e30;--good-line:#40824f;--bad:#fff0ec;--bad-ink:#982f20;--bad-line:#bc5745;--field:#fff;--shadow:rgba(16,42,67,.1);--lime:var(--accent);background:var(--canvas);color:var(--ink)}
:root[data-theme="night"]{color-scheme:dark;--canvas:#101820;--ink:#e7eef3;--muted:#b7c8d4;--card:#17232d;--soft:#1e3343;--line:#526b7d;--accent:#82c7ef;--button:#82c7ef;--button-ink:#102a43;--gold:#e0ad5f;--gold-soft:#382d1d;--gold-ink:#f2cb86;--good:#163824;--good-ink:#b4edc1;--good-line:#68ad7b;--bad:#41251f;--bad-ink:#ffc4b6;--bad-line:#d28977;--field:#101c26;--shadow:rgba(0,0,0,.25)}
*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--canvas);color:var(--ink)}button,input,textarea,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:0;min-height:44px}button:disabled{cursor:default;opacity:.72}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid var(--gold);outline-offset:4px}a{color:var(--accent)}p{line-height:1.7}h1,h2,h3,p{margin-top:0}h1,h2,h3{font-family:Arial,Helvetica,sans-serif;font-weight:700;line-height:1.25;letter-spacing:normal;overflow-wrap:anywhere}h1{font-size:clamp(34px,4.4vw,52px);line-height:1.16;letter-spacing:-.7px;margin-bottom:22px}h2{font-size:27px}h3{font-size:21px;margin-bottom:12px}header{max-width:1260px;margin:auto;display:flex;justify-content:space-between;align-items:center;padding:20px 28px;border-bottom:3px solid var(--gold);gap:20px;flex-wrap:wrap;background:var(--card)}.brand{display:flex;align-items:center;gap:18px;text-decoration:none;color:var(--ink);min-width:0}.tkg-logo{display:block;width:172px;height:auto;background:#fff;border-radius:6px;padding:4px;flex-shrink:0}.brand-name{font-size:24px;line-height:1.2;font-weight:700;border-left:1px solid var(--line);padding-left:18px}.brand-name small{display:block;font-size:13px;color:var(--muted);font-weight:400;margin-top:6px}.header-right{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.grade{font-size:14px;color:var(--muted);font-weight:700}.theme-toggle{background:var(--soft);color:var(--ink);border:1px solid var(--line);border-radius:24px;padding:9px 16px;font-size:15px;font-weight:700;white-space:nowrap}.theme-toggle:hover{border-color:var(--accent)}.quiet{background:none;color:var(--accent);font-size:15px;padding:8px}.quiet:hover{text-decoration:underline}.wallet{padding:9px 14px;border:1px solid var(--gold);background:var(--gold-soft);border-radius:25px;color:var(--gold-ink);white-space:nowrap}main{max-width:1192px;margin:0 auto;padding:36px 24px}.eyebrow{font-size:13px;letter-spacing:1px;font-weight:700;color:var(--accent);margin-bottom:18px}.small,.guide-copy{font-size:15px;color:var(--muted);line-height:1.7}.guide-copy{max-width:850px}.primary{background:var(--button);color:var(--button-ink);padding:14px 24px;border:2px solid transparent;border-radius:12px;font-weight:700;box-shadow:0 3px 0 var(--shadow);transition:transform .15s}.primary:hover:not(:disabled){transform:translateY(-2px)}.secondary{background:var(--soft);color:var(--ink);padding:12px 19px;border:1px solid var(--line);border-radius:12px;font-weight:700}.secondary:hover{border-color:var(--accent)}.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:32px;margin-bottom:30px}.hero p{color:var(--muted);max-width:540px;font-size:18px}.hero-art{border:1px solid var(--line);background:linear-gradient(135deg,var(--soft),var(--card));border-radius:24px;position:relative;min-height:290px;overflow:hidden;display:flex;align-items:center;justify-content:center}.orbit{width:210px;height:210px;border:1px solid var(--line);border-radius:50%;position:absolute;transform:rotate(-20deg) scaleX(1.5)}.orbit.two{transform:rotate(45deg) scaleX(1.5)}.mascot{font-size:112px;filter:drop-shadow(0 18px 10px var(--shadow));z-index:1;animation:bob 4s ease-in-out infinite}.art-tag{position:absolute;background:var(--card);color:var(--ink);border:1px solid var(--gold);border-radius:12px;padding:10px 14px;font-weight:700;font-size:13px;z-index:2}.art-tag.top{top:18px;left:18px;transform:rotate(-5deg)}.art-tag.bottom{bottom:20px;right:18px;transform:rotate(4deg);color:var(--accent)}@keyframes bob{50%{transform:translateY(-9px) rotate(4deg)}}.hero-actions{display:flex;align-items:center;gap:18px;margin-top:25px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:25px 0 32px}.stat{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px}.stat strong{font-size:26px;color:var(--ink)}.stat span{font-size:14px;color:var(--muted);display:block;margin-top:6px}.section-line{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:24px;margin-bottom:16px}.section-line h2{margin:0}.skill-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}.skill{background:var(--card);border:1px solid var(--line);color:var(--ink);border-radius:16px;padding:18px;text-align:left;min-height:210px;transition:transform .15s,border-color .15s;position:relative}.skill:hover{transform:translateY(-4px);border-color:var(--accent)}.skill .icon{font-size:30px;display:block;margin-bottom:17px}.skill .code{font-size:13px;color:var(--muted)}.skill h3{font-size:20px;margin:7px 0 12px}.skill .status{font-size:13px;line-height:1.55;color:var(--muted)}.bar{background:var(--soft);border-radius:10px;height:7px;overflow:hidden;margin:12px 0}.bar>i{display:block;height:100%;background:var(--accent);border-radius:10px}.ready{border-color:var(--good-line)}.shop{display:flex;gap:12px;flex-wrap:wrap}.shop button{background:var(--card);color:var(--ink);border:1px solid var(--line);border-radius:14px;padding:16px;min-width:125px}.shop button.selected{border:2px solid var(--gold);background:var(--gold-soft)}.shop .pet{display:block;font-size:32px;margin-bottom:6px}.shop span:last-child{font-size:14px;color:var(--muted)}.notice{padding:18px;color:var(--muted);background:var(--soft);border-left:4px solid var(--gold);border-radius:10px;font-size:15px;line-height:1.7;margin-top:24px}footer{max-width:1192px;margin:15px auto 0;padding:22px 24px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}.play{max-width:880px;margin:auto}.play-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;gap:12px;flex-wrap:wrap}.round-progress{height:9px;border-radius:10px;background:var(--soft);margin-bottom:25px}.round-progress i{height:100%;display:block;background:var(--accent);border-radius:10px;transition:width .3s}.question{background:var(--card);color:var(--ink);border:1px solid var(--line);border-radius:23px;padding:30px;box-shadow:0 6px 16px var(--shadow)}.question .eyebrow{color:var(--accent);margin-bottom:15px}.question h2{font-size:25px;line-height:1.6;letter-spacing:normal;margin-bottom:26px}.answers{display:grid;grid-template-columns:1fr 1fr;gap:14px}.answer{display:flex;align-items:center;gap:13px;text-align:left;border:2px solid var(--line);background:var(--field);border-radius:13px;padding:18px;color:var(--ink);min-height:85px;font-size:19px;font-weight:600;line-height:1.6;overflow-wrap:anywhere}.answer:hover:not(:disabled){border-color:var(--accent);background:var(--soft)}.answer .letter{border-radius:8px;background:var(--soft);padding:5px 10px;color:var(--accent);font-size:14px}.answer.correct{background:var(--good);color:var(--good-ink);border-color:var(--good-line)}.answer.incorrect{background:var(--bad);color:var(--bad-ink);border-color:var(--bad-line)}.answer:disabled{opacity:1;cursor:default}.play-tools{display:flex;justify-content:space-between;align-items:center;gap:15px;flex-wrap:wrap;margin-top:22px}.hint{background:transparent;color:var(--accent);font-size:15px;text-decoration:underline;padding:8px 0}.scratch{width:100%;resize:vertical;min-height:95px;border:1px dashed var(--line);border-radius:10px;padding:12px;font:17px Arial,Helvetica,sans-serif;margin-top:14px;background:var(--field);color:var(--ink)}.feedback{margin-top:20px;padding:24px;border-radius:14px;border:1px solid var(--line);background:var(--card);color:var(--ink);line-height:1.7}.feedback.good{border-color:var(--good-line);background:var(--good)}.feedback h3{font-size:21px}.feedback p{color:var(--ink);font-size:17px}.feedback .small{font-size:15px;color:var(--muted)}.feedback .primary{margin-top:8px}.hintbox{background:var(--soft);color:var(--ink);padding:16px;border-left:4px solid var(--gold);border-radius:10px;font-size:17px;line-height:1.7;margin:15px 0}.result{text-align:center;max-width:700px;margin:20px auto}.result-icon{font-size:85px}.result h1{font-size:40px;margin:22px 0}.result p{color:var(--muted)}.result .stats{text-align:left}.result-actions{display:flex;justify-content:center;gap:15px;flex-wrap:wrap}dialog{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:20px;padding:30px;max-width:900px;width:92%;max-height:90vh}dialog::backdrop{background:#081523bd}.close{float:right;background:var(--soft);border-radius:8px;color:var(--ink);font-size:24px;min-width:44px}.guide-actions{display:flex;gap:10px;flex-wrap:wrap}table{border-collapse:collapse;width:100%;font-size:14px;margin:20px 0}td,th{padding:13px 10px;text-align:left;border-bottom:1px solid var(--line)}th{color:var(--accent);background:var(--soft);font-weight:700}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:var(--button);color:var(--button-ink);padding:15px 22px;border-radius:12px;font-size:16px;font-weight:700;z-index:5;max-width:90vw}.mode-pill{border:1px solid var(--line);border-radius:20px;padding:7px 12px;color:var(--accent);font-size:14px}.entry{max-width:600px;margin:20px auto 55px}.entry p{color:var(--muted)}.entry form{background:var(--card);padding:28px;border-radius:18px;border:1px solid var(--line);margin:24px 0}.entry label,.teacher-form label{display:block;font-size:16px;margin:18px 0 9px;font-weight:600}.entry input,.teacher-form input,.teacher-form textarea,.teacher-form select{width:100%;padding:14px;border:1px solid var(--line);background:var(--field);border-radius:10px;color:var(--ink);font:inherit;min-height:48px}input::placeholder,textarea::placeholder{color:var(--muted);opacity:1}.entry .primary{width:100%;margin-top:24px}.entry input#classCode{text-transform:uppercase;letter-spacing:1px}.entry input#pin{letter-spacing:12px;font-size:24px}.teacherLink{color:var(--accent);font-size:15px;text-underline-offset:3px}#entryError,#loginError{color:var(--bad-ink)}.teacher-form{max-width:760px;background:var(--card);padding:26px;border:1px solid var(--line);border-radius:16px}.teacher-form textarea{min-height:110px}.teacher-form .primary{margin-top:20px}.teacher-status{color:var(--accent);line-height:1.7}.class-card{border:1px solid var(--line);background:var(--card);padding:24px;border-radius:14px;margin:16px 0}.class-code{font:700 27px/1.5 Consolas,monospace;color:var(--accent);letter-spacing:3px}.table-wrap{overflow:auto}.teacher-report td,.teacher-report th{white-space:nowrap}#identity{max-width:240px;font-size:14px;line-height:1.5}button[hidden]{display:none}.fraction{display:inline-flex;flex-direction:column;vertical-align:middle;text-align:center;font-size:.9em;line-height:1.3;margin:0 4px;min-width:22px}.fraction>span:first-child{border-bottom:1px solid currentColor;padding:0 4px 2px}.fraction>span:last-child{padding:2px 3px 0}.dash-top,.class-heading{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:24px 0}.dash-nav{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:24px 0;padding-bottom:20px;border-bottom:1px solid var(--line)}.dash-nav button{background:var(--card);color:var(--ink);border:1px solid var(--line);border-radius:10px;padding:12px 18px;font-size:16px}.dash-nav button.selected{background:var(--button);color:var(--button-ink);border-color:var(--button)}.dash-status{line-height:1.7;color:var(--accent);min-height:26px}.dash-status.error{color:var(--bad-ink)}.class-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:18px}.class-grid .class-card{margin:0}.class-card .section-line{margin-top:0}.badge{display:inline-block;font-size:14px;border:1px solid var(--line);border-radius:20px;padding:7px 12px;color:var(--muted);background:var(--soft)}.button-row{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-top:18px}.button-row .primary{margin-top:0}.student-code-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(155px,1fr));gap:14px;margin:24px 0 35px}.student-code{display:flex;align-items:flex-start;flex-direction:column;gap:8px;border:1px solid var(--line);border-radius:12px;background:var(--card);padding:16px}.student-code strong{font:700 27px Consolas,monospace;color:var(--accent)}.student-code span{font-size:14px;color:var(--muted)}.student-code.inactive{border-style:dashed}.teacher-form fieldset{border:1px solid var(--line);border-radius:12px;margin:22px 0;padding:16px}.teacher-form legend{font-size:16px;padding:0 8px;font-weight:600}.teacher-form label.check{display:flex;align-items:center;gap:12px;margin:14px 0;font-weight:400}.teacher-form .check input{width:21px;height:21px;min-height:21px;flex-shrink:0;accent-color:var(--button)}.check small{display:inline-block;color:var(--muted);font-size:14px;margin-left:7px}.key-display{width:100%;margin:15px 0;padding:14px;font:16px/1.6 Consolas,monospace;color:var(--ink);background:var(--field);border:1px solid var(--line);border-radius:10px;min-height:100px;overflow-wrap:anywhere}.item-preview{margin-top:20px}.item-preview .answer{cursor:default}.class-heading h2{margin:12px 0}#dashBody h3{margin-top:24px}#bank ol{line-height:1.9;color:var(--ink)}
@media(max-width:1000px){.skill-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.hero{grid-template-columns:1.2fr 1fr}.header-right{gap:12px}.brand-name{font-size:22px}}
@media(max-width:700px){header{padding:16px 18px;gap:16px}.header-right{width:100%;justify-content:flex-start;gap:10px}.header-right .grade{display:none}main{padding:28px 18px}.brand{gap:13px}.tkg-logo{width:145px}.brand-name{font-size:21px;padding-left:13px}.brand-name small{font-size:12px}.hero{grid-template-columns:1fr}.hero-art{min-height:220px}.mascot{font-size:90px}.orbit{width:160px;height:160px}h1{font-size:38px}h2{font-size:24px}.skill-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.skill{padding:16px;min-height:210px}.stats{gap:10px}.stat{padding:14px}.stat strong{font-size:23px}.answers{grid-template-columns:1fr}.question{padding:22px}.question h2{font-size:23px}.hero-actions{gap:14px;flex-wrap:wrap}.dash-top,.class-heading{align-items:flex-start;flex-direction:column}.teacher-form{padding:20px}.class-grid{grid-template-columns:1fr}.student-code-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.section-line{align-items:flex-start}.result h1{font-size:34px}#identity{max-width:none}.art-tag{font-size:12px}.entry form{padding:22px}.wallet{padding:8px 12px}}
@media(max-width:380px){.tkg-logo{width:124px}.brand-name{font-size:19px}.brand-name small{font-size:11px}.stats{grid-template-columns:1fr}.skill h3{font-size:18px}.theme-toggle{font-size:14px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.admin-signin{max-width:800px}.microsoft-signin{display:flex;align-items:center;justify-content:center;gap:12px}.ms-logo{display:grid;grid-template-columns:9px 9px;gap:2px}.ms-logo i{width:9px;height:9px;background:#f35325}.ms-logo i:nth-child(2){background:#81bc06}.ms-logo i:nth-child(3){background:#05a6f0}.ms-logo i:nth-child(4){background:#ffba08}#adminLoginError{color:var(--bad-ink)}