:root{--ivory:#F7F4EC;--card:#FFFDF8;--navy:#14263D;--teal:#087F83;--teal-d:#066468;--gold:#C6A467;--muted:#4F5D74;--line:#E2DBC8;--tint:#EEF4F2;--ok:#1B7A46;--okbg:#E4F3EA;--bad:#A63D2A;--badbg:#FBE9E4;--purple:#6246B5;--coral:#B84A33;--display:"Bricolage Grotesque","Trebuchet MS",system-ui,sans-serif;--body:"Figtree",system-ui,-apple-system,"Segoe UI",sans-serif;color-scheme:light}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{background:var(--ivory);color:var(--navy);font:400 18px/1.55 var(--body);display:flex;flex-direction:column;overflow:hidden}
h1,h2,h3{font-family:var(--display);line-height:1.12;margin:0;text-wrap:balance;letter-spacing:-.01em}
h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:800}
h2{font-size:clamp(1.45rem,3.4vw,2.1rem);font-weight:800}
h3{font-size:1.15rem;font-weight:600}
p{margin:0}
:focus-visible{outline:3px solid var(--teal);outline-offset:2px;border-radius:6px}
.top{display:flex;align-items:center;gap:12px;padding:10px 18px;background:var(--navy);color:#fff;font-size:.9rem;font-weight:600;flex:none}
.top .brand{font-family:var(--display);font-weight:800;letter-spacing:.02em;color:var(--gold)}
.top .ttl{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;opacity:.9}
.top .ctr{font-variant-numeric:tabular-nums;opacity:.9}
.prog{height:5px;background:#2a3d57;flex:none}
.prog i{display:block;height:100%;width:0;background:var(--gold);transition:width .25s}
.stage{flex:1;overflow:auto;padding:22px 18px 28px;-webkit-overflow-scrolling:touch}
.slide{max-width:980px;margin:0 auto;display:flex;flex-direction:column;gap:18px;animation:in .22s ease-out}
@keyframes in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.tag{display:inline-block;font-size:.76rem;font-weight:800;letter-spacing:.13em;text-transform:uppercase;color:var(--teal)}
.tag.chk{color:var(--purple)}
.lead{font-size:1.18rem;color:var(--muted);max-width:62ch}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px 20px}
.card.key{background:var(--tint);border-color:#cfe2dd;border-left:6px solid var(--teal)}
.card.warn{background:#FBF3DD;border-color:#EBD9A6;border-left:6px solid var(--gold)}
.row{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-start}
.row>*{min-width:0}
.col2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.col2>*{min-width:0}
b.n,.n{font-variant-numeric:tabular-nums;white-space:nowrap}
.big{font-family:var(--display);font-weight:800;font-size:clamp(1.8rem,5vw,2.8rem);color:var(--teal);font-variant-numeric:tabular-nums}
ul.pl{margin:0;padding-left:1.15em;display:flex;flex-direction:column;gap:6px}
.hide{display:none!important}
/* nav */
.nav{display:flex;align-items:center;gap:10px;padding:10px 14px calc(10px + env(safe-area-inset-bottom,0px));background:var(--card);border-top:1px solid var(--line);flex:none}
.nav .dots{flex:1;display:flex;justify-content:center;gap:6px;flex-wrap:wrap;min-width:0}
.dots button{width:14px;height:14px;padding:0;border-radius:50%;border:2px solid #9AA5B8;background:transparent;cursor:pointer}
.dots button.done{background:#9AA5B8}
.dots button.cur{background:var(--navy);border-color:var(--navy);transform:scale(1.25)}
.dots button.chk{border-color:var(--purple)}
.dots button.chk.done{background:var(--purple)}
.btn{font:700 1rem var(--body);display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 22px;border-radius:12px;border:2px solid var(--teal);background:var(--teal);color:#fff;cursor:pointer}
.btn:hover{background:var(--teal-d);border-color:var(--teal-d)}
.btn.ghost{background:transparent;color:var(--navy);border-color:var(--navy)}
.btn.ghost:hover{background:var(--navy);color:#fff}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.sm{min-height:40px;padding:6px 14px;font-size:.95rem}
.skip{background:none;border:0;color:var(--muted);text-decoration:underline;font:600 .9rem var(--body);cursor:pointer;padding:8px;min-height:40px}
/* discs */
.disc{--c:#999;--t:#fff;display:inline-grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--c);color:var(--t);font:800 .72rem var(--body);box-shadow:inset 0 -3px 0 rgba(0,0,0,.18),0 1px 2px rgba(20,38,61,.25);flex:none}
.disc.d4{--c:var(--gold);--t:var(--navy);font-size:.62rem;letter-spacing:-.04em}
.disc.d3{--c:var(--teal)}
.disc.d2{--c:var(--navy)}
.disc.d1{--c:var(--purple)}
.disc.d0{--c:var(--coral)}
.disc.s{width:28px;height:28px;font-size:.58rem}
.disc.s.d4{font-size:.5rem}
.pv{border-collapse:separate;border-spacing:0;border:2px solid var(--navy);border-radius:12px;overflow:hidden;background:#fff;max-width:100%}
.pv th{background:var(--navy);color:#fff;font:700 .8rem var(--body);padding:6px 8px;text-align:center;border-left:1px solid #3a4f6b}
.pv th:first-child{border-left:0}
.pv td{vertical-align:top;border-left:2px solid var(--navy);padding:8px;text-align:center;min-width:92px}
.pv td:first-child{border-left:0}
.pv td.dg{font:800 1.6rem var(--display);color:var(--teal);font-variant-numeric:tabular-nums;vertical-align:middle;padding:6px 8px;border-top:2px solid var(--navy)}
.pv td.hl,.pv th.hl{background:#FFF1C9}
.pv th.hl{background:var(--gold);color:var(--navy)}
.pv td.dg.hl{color:var(--navy)}
.cell{display:flex;flex-wrap:wrap;gap:4px;justify-content:center;min-height:42px;align-content:flex-start;max-width:132px;margin:0 auto}
.pv.sm td{min-width:68px;padding:5px}
.pv.sm .cell{max-width:100px}
/* number line */
.nl{width:100%;height:auto;display:block;max-width:760px}
.nl text{font:600 15px var(--body);fill:var(--navy)}
.nl .lab{font-weight:800}
/* sequence */
.seq{display:flex;flex-wrap:wrap;gap:6px 0;align-items:center}
.seq .chip{font:800 1.2rem var(--display);font-variant-numeric:tabular-nums;background:#fff;border:2px solid var(--navy);border-radius:10px;padding:6px 12px;min-width:84px;text-align:center}
.seq .chip.q{border-style:dashed;border-color:var(--purple);color:var(--purple);background:#F2EEFB}
.seq .chip.hl{background:#FFF1C9}
.seq .arr{display:flex;flex-direction:column;align-items:center;font-size:.78rem;font-weight:800;color:var(--teal);padding:0 4px;min-width:52px}
.seq .arr:after{content:"";display:block;width:100%;height:2px;background:var(--teal);margin-top:2px;position:relative}
/* widgets */
.wd{background:var(--card);border:2px solid var(--line);border-radius:16px;padding:16px}
.bld{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.bld .c{border:2px solid var(--navy);border-radius:12px;background:#fff;display:flex;flex-direction:column;align-items:center;gap:6px;padding:8px 4px;min-width:0}
.bld .c h4{margin:0;font:700 .74rem var(--body);text-align:center;color:var(--navy)}
.bld .c .cell{min-height:80px;max-width:100%}
.bld .c .pm{display:flex;gap:6px}
.bld .c .pm button{width:42px;height:42px;border-radius:50%;border:2px solid var(--navy);background:#fff;font:800 1.3rem var(--body);color:var(--navy);cursor:pointer;line-height:1}
.bld .c .pm button:hover{background:var(--navy);color:#fff}
.bld .c .dgt{font:800 1.5rem var(--display);color:var(--teal)}
.out{margin-top:12px;display:flex;flex-wrap:wrap;gap:6px 18px;align-items:baseline}
.out .words{color:var(--muted);font-size:1rem}
.tg{margin-top:12px;padding:10px 14px;border-radius:12px;background:#F2EEFB;border:2px solid #d9cff2;display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center}
.tg.won{background:var(--okbg);border-color:#b7dcc6}
input[type=range]{width:100%;accent-color:var(--teal);height:34px}
input.num{font:700 1.3rem var(--display);padding:10px 14px;border:2px solid #9AA5B8;border-radius:12px;width:min(100%,240px);color:var(--navy);background:#fff;font-variant-numeric:tabular-nums}
.rbtn{display:flex;flex-wrap:wrap;gap:8px}
.rbtn button{font:700 .98rem var(--body);min-height:42px;padding:6px 14px;border-radius:999px;border:2px solid var(--navy);background:#fff;color:var(--navy);cursor:pointer}
.rbtn button[aria-pressed=true]{background:var(--navy);color:#fff}
/* quiz */
.qz{display:flex;flex-direction:column;gap:14px}
.qhead{display:flex;justify-content:space-between;align-items:center;font-weight:700;color:var(--muted);font-size:.95rem}
.qbar{display:flex;gap:6px}
.qbar i{width:30px;height:8px;border-radius:5px;background:#D5CFBC}
.qbar i.ok{background:var(--ok)}.qbar i.no{background:var(--bad)}.qbar i.cur{background:var(--purple)}
.qtext{font-size:1.28rem;font-weight:600;line-height:1.4}
.opts{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));gap:10px}
.opt{font:600 1.1rem var(--body);text-align:left;padding:12px 16px;min-height:54px;border-radius:12px;border:2px solid #9AA5B8;background:#fff;color:var(--navy);cursor:pointer;font-variant-numeric:tabular-nums}
.opt:hover:not(:disabled){border-color:var(--teal);background:var(--tint)}
.opt.ok{border-color:var(--ok);background:var(--okbg)}
.opt.no{border-color:var(--bad);background:var(--badbg)}
.opt:disabled{cursor:default}
.fb{padding:14px 16px;border-radius:12px;border:2px solid;display:none}
.fb.show{display:block}
.fb.ok{background:var(--okbg);border-color:#b7dcc6}
.fb.no{background:var(--badbg);border-color:#efc3b8}
.fb.try{background:#FBF3DD;border-color:#EBD9A6}
.fb b.h{display:block;font-family:var(--display);font-size:1.1rem;margin-bottom:2px}
.ans{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.pool{display:flex;flex-wrap:wrap;gap:8px}
.pool button,.slots span{font:800 1.15rem var(--display);font-variant-numeric:tabular-nums;min-width:90px;padding:10px 14px;border-radius:10px;border:2px solid var(--navy);background:#fff;color:var(--navy);cursor:pointer}
.pool button:disabled{opacity:.3;cursor:default}
.slots{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.slots span{border-style:dashed;border-color:#9AA5B8;color:#9AA5B8;cursor:default;text-align:center}
.slots span.f{border-style:solid;border-color:var(--navy);color:var(--navy);background:#fff}
.slots em{font-style:normal;font-weight:700;color:var(--muted)}
.score{text-align:center;padding:26px 18px;display:flex;flex-direction:column;gap:12px;align-items:center}
.stars{font-size:2rem;letter-spacing:.2em;color:var(--gold)}
.endc{background:var(--navy);color:#fff;border-radius:20px;padding:30px 26px;display:flex;flex-direction:column;gap:12px}
.endc h2{color:var(--gold)}
.endc .pb{display:inline-block;background:var(--gold);color:var(--navy);font:800 1.3rem var(--display);padding:10px 18px;border-radius:12px;align-self:flex-start}
.endc ul{margin:0;padding-left:1.1em}
.ok-t{color:var(--ok);font-weight:800}.bad-t{color:var(--bad);font-weight:800}
mark{background:#FFF1C9;padding:0 .2em;border-radius:4px}
@media(max-width:720px){.btn{white-space:nowrap}.bld .c .pm{flex-direction:column}.bld .c h4{font-size:.6rem}.bld .c .cell{min-height:100px;gap:3px}.bld .disc.s{width:24px;height:24px;font-size:.5rem}.bld .disc.s.d4{font-size:.42rem}.nav{gap:6px}.skip{font-size:.8rem;line-height:1.2}body{font-size:17px}.col2{grid-template-columns:1fr}.stage{padding:16px 12px 22px}.bld{gap:4px}.bld .c{padding:6px 2px}.bld .c .pm button{width:38px;height:38px}.disc{width:32px;height:32px;font-size:.62rem}.pv td{min-width:60px;padding:5px 3px}.cell{max-width:104px}.seq .chip{min-width:70px;font-size:1.05rem}.btn{padding:10px 16px}.nav .dots{display:none}.nav .sp{flex:1}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}