:root{--ink:#22252b;--muted:#5d6470;--bg:#fbf8f2;--card:#fff;--line:#e8e2d6;--c:#7c4dff;--r:18px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Rubik","Heebo","Assistant",Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:17px;line-height:1.6;overflow-x:hidden}
a{color:inherit}
.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 12px;background:rgba(251,248,242,.95);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:8px;text-decoration:none;min-width:0}
.brand-t{display:flex;flex-direction:column;line-height:1.15}
.brand-t b{font-size:1.15rem}.brand-t small{color:var(--muted);font-size:.85rem}
.home-btn{display:inline-flex;align-items:center;min-height:46px;padding:8px 14px;border-radius:999px;background:#22252b;color:#fff;text-decoration:none;font-weight:600;font-size:.95rem;white-space:nowrap}
main{display:block;outline:none}
.wrap{max-width:980px;margin:0 auto;padding:16px 14px 28px}
.hero{text-align:center;padding:26px 14px 10px}
.hero h1{font-size:1.8rem;line-height:1.2;margin:.2em 0}
.hero p{color:var(--muted);margin:.3em auto;max-width:640px}
.legend{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:14px 0 4px;padding:0;list-style:none}
.legend li{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-size:.92rem}
.topics{display:grid;grid-template-columns:1fr;gap:14px;margin-top:18px}
@media(min-width:620px){.topics{grid-template-columns:1fr 1fr}}
@media(min-width:900px){.topics{grid-template-columns:1fr 1fr 1fr}}
.tcard{display:flex;align-items:center;gap:14px;min-height:96px;padding:16px;border-radius:var(--r);background:var(--card);border:2px solid var(--line);border-inline-start:8px solid var(--c);text-decoration:none;box-shadow:0 2px 8px rgba(0,0,0,.05);transition:transform .15s}
.tcard:hover,.tcard:focus-visible{transform:translateY(-2px)}
.tcard .em{font-size:2.4rem;line-height:1}
.tcard b{display:block;font-size:1.25rem}
.tcard span.s{color:var(--muted);font-size:.95rem}
.howto{margin-top:24px;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px 16px}
.howto h2{margin:.1em 0 .3em;font-size:1.2rem}
.howto ul{margin:.2em 0;padding-inline-start:1.2em}
/* topic */
.band{background:var(--c);color:#fff;padding:22px 14px 18px;text-align:center}
.band .em{font-size:3rem;line-height:1}
.band h1{margin:.15em 0 0;font-size:2rem;line-height:1.2}
.band p{margin:.2em 0 0;opacity:.95;font-size:1.05rem}
.pn{display:flex;justify-content:space-between;gap:8px;margin:12px auto 0;max-width:980px;padding:0 14px}
.pn a{flex:1;display:flex;align-items:center;justify-content:center;min-height:48px;padding:8px 10px;border-radius:14px;background:#fff;border:1px solid var(--line);text-decoration:none;font-weight:600;font-size:.95rem;text-align:center}
.jump{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 4px}
.jump button{min-height:46px;padding:8px 14px;border-radius:999px;border:2px solid var(--c);background:#fff;color:var(--ink);font:inherit;font-size:.95rem;font-weight:600;cursor:pointer}
.jump button:hover{background:var(--c);color:#fff}
.sec{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px;margin-top:16px;scroll-margin-top:80px}
.sec h2{margin:0 0 .5em;font-size:1.35rem;line-height:1.3;color:var(--c)}
.sec h3{margin:.8em 0 .3em;font-size:1.1rem}
.who{display:inline-block;font-size:.8rem;font-weight:700;border-radius:999px;padding:2px 10px;margin-inline-start:6px;vertical-align:middle;color:#fff;background:#455a64}
.who.st{background:#ef6c00}
.goal{background:#f6f3ff;background:color-mix(in srgb,var(--c) 9%,#fff);border-radius:12px;padding:10px 12px;margin:0 0 10px}
dl.concepts{margin:0}
dl.concepts dt{font-weight:700;margin-top:8px}
dl.concepts dd{margin:0 0 0 0;color:#333}
.note{border-inline-start:4px solid #f9a825;background:#fffbea;padding:8px 12px;border-radius:8px;margin-top:10px}
.phase{border:1px solid var(--line);border-radius:14px;padding:12px 14px;margin-top:10px;position:relative}
.phase .t{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-weight:700;font-size:1.08rem}
.phase .min{background:var(--c);color:#fff;border-radius:999px;padding:2px 10px;font-size:.85rem}
.phase ol,.act ol,.sec ol{margin:.4em 0 0;padding-inline-start:1.3em}
.phase li,.act li{margin:.25em 0}
.acts{display:grid;gap:12px;grid-template-columns:1fr}
@media(min-width:760px){.acts{grid-template-columns:1fr 1fr 1fr}}
.act{border:1px solid var(--line);border-radius:14px;padding:12px 14px;background:#fffdf9}
.act .h{font-weight:700;font-size:1.05rem}
.act .k{display:inline-block;font-size:.82rem;color:var(--muted)}
.story{background:#fbf6ec;border-radius:14px;padding:14px 16px;font-size:1.05rem}
.story p{margin:.45em 0}
.tracks{display:grid;gap:10px}
.track{border-radius:14px;padding:10px 14px;border:2px solid var(--line)}
.track b{font-size:1.05rem}
.track.t1{background:#f1f8e9;border-color:#c5e1a5}.track.t2{background:#e8f5e9;border-color:#a5d6a7}.track.t3{background:#e0f2f1;border-color:#80cbc4}
.track.acc{background:#e3f2fd;border-color:#90caf9}
.track ul{margin:.3em 0 0;padding-inline-start:1.2em}
.files{display:grid;grid-template-columns:1fr;gap:10px}
@media(min-width:560px){.files{grid-template-columns:1fr 1fr}}
.bigbtn{display:flex;align-items:center;justify-content:center;gap:10px;min-height:64px;padding:12px 16px;border-radius:16px;background:var(--c);color:#fff;text-decoration:none;font-weight:700;font-size:1.1rem;text-align:center;box-shadow:0 3px 0 rgba(0,0,0,.18)}
.bigbtn.alt{background:#fff;color:var(--ink);border:2px solid var(--c);box-shadow:none}
.links{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.links a{display:flex;align-items:center;gap:10px;min-height:52px;padding:10px 14px;border-radius:12px;border:1px solid var(--line);background:#fafafa;text-decoration:none;overflow-wrap:anywhere}
.credit{color:var(--muted);font-size:.9rem;margin-top:8px}
/* spinner */
.spin-wrap{display:flex;flex-direction:column;align-items:center;gap:12px}
.wheel-box{position:relative;width:min(260px,72vw);aspect-ratio:1}
.pointer{position:absolute;top:-6px;left:50%;transform:translateX(-50%);width:0;height:0;border-left:14px solid transparent;border-right:14px solid transparent;border-top:24px solid #22252b;z-index:2}
.wheel{width:100%;height:100%;border-radius:50%;border:6px solid #fff;box-shadow:0 0 0 3px var(--c),0 6px 16px rgba(0,0,0,.15);position:relative;transition:transform 3.2s cubic-bezier(.17,.67,.2,1)}
.wheel span{position:absolute;left:50%;top:50%;width:0;height:0;font-weight:800;font-size:1.3rem;color:#fff}
.wheel span i{position:absolute;transform:translate(-50%,-50%);font-style:normal;text-shadow:0 1px 2px rgba(0,0,0,.35)}
.spin-btn{min-height:56px;padding:10px 28px;border-radius:999px;border:0;background:#22252b;color:#fff;font:inherit;font-weight:700;font-size:1.15rem;cursor:pointer}
.spin-btn:disabled{opacity:.6}
.dilemma{width:100%;min-height:84px;border:2px dashed var(--c);border-radius:14px;padding:12px 14px;background:#fff;font-size:1.1rem;text-align:center;display:flex;align-items:center;justify-content:center}
.dlist{margin-top:10px}
.dlist summary{cursor:pointer;font-weight:600;min-height:44px;display:flex;align-items:center}
/* flip cards */
.flips{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(min-width:760px){.flips{grid-template-columns:repeat(3,1fr)}}
.flip{perspective:900px;border:0;padding:0;background:none;font:inherit;cursor:pointer;min-height:130px;text-align:center}
.flip .in{position:relative;display:block;width:100%;height:100%;min-height:130px;transition:transform .5s;transform-style:preserve-3d}
.flip.on .in{transform:rotateY(180deg)}
.flip .f,.flip .b{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:10px;border-radius:14px;backface-visibility:hidden;-webkit-backface-visibility:hidden}
.flip .f{background:var(--c);color:#fff;font-weight:800;font-size:1.15rem}
.flip .b{background:#fff;border:2px solid var(--c);transform:rotateY(180deg);font-size:.95rem;line-height:1.4}
.hint{color:var(--muted);font-size:.9rem;margin:.2em 0 .6em}
.foot{display:flex;flex-direction:column;align-items:center;gap:4px;text-align:center;padding:20px 14px 28px;color:var(--muted);border-top:1px solid var(--line);margin-top:20px}
.foot span{font-weight:700;color:var(--ink)}
.foot small{max-width:560px}
@media (prefers-reduced-motion:reduce){.wheel,.flip .in,.tcard{transition:none}}
@media print{.top,.jump,.pn,.spin-wrap,.foot img{display:none}.sec{break-inside:avoid}}