:root{--bg:#080b13;--panel:#111827;--panel2:#0c1220;--line:#ffffff1c;--ink:#f3f5fc;--muted:#9aa3b8;--accent:#c6ff8a;--pink:#ff8fc0;--yellow:#ffe46b}
*{box-sizing:border-box}[hidden]{display:none!important}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:'Noto Sans JP',system-ui,sans-serif;-webkit-text-size-adjust:100%}
body{max-width:920px;margin:0 auto;padding:max(14px,env(safe-area-inset-top)) 16px max(28px,env(safe-area-inset-bottom));background:radial-gradient(900px 420px at 15% -10%,#1e3b2a55,transparent),radial-gradient(700px 380px at 100% 0,#3b1e3a44,transparent),var(--bg)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
a{color:var(--accent)}
.mk-top{display:flex;align-items:center;gap:12px}.mk-top>div{flex:1;min-width:0}
.mk-back{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);color:var(--ink);text-decoration:none;font-size:20px;flex:none}
.mk-eyebrow{margin:0;font-size:11px;letter-spacing:.18em;color:var(--accent)}
h1{margin:2px 0 0;font-size:clamp(21px,5vw,32px);line-height:1.25}
.mk-lang select{font:inherit;font-size:16px;color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:8px 10px}
.mk-lead{color:#c9d0de;font-size:15px;line-height:1.75;margin:14px 0 16px}
.mk-steps{position:sticky;top:0;z-index:5;display:flex;gap:6px;overflow-x:auto;padding:8px 0;margin:0 -16px 14px;padding-inline:16px;background:linear-gradient(var(--bg) 80%,transparent);scrollbar-width:none}
.mk-steps button{flex:none;display:flex;align-items:center;gap:7px;font:inherit;font-size:14px;font-weight:700;color:var(--muted);background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:8px 14px;cursor:pointer}
.mk-steps button b{display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:#ffffff14;font-size:12px}
.mk-steps button[aria-selected=true]{color:var(--bg);background:var(--accent);border-color:var(--accent)}.mk-steps button[aria-selected=true] b{background:#0000001f}
.mk-stock-tab i{font-style:normal;min-width:22px;text-align:center;border-radius:9px;background:var(--pink);color:var(--bg);font-size:12px;padding:1px 6px}
.mk-pane{display:none;flex-direction:column;gap:14px}.mk-pane.on{display:flex;animation:mkin .25s ease}
@keyframes mkin{from{opacity:0;transform:translateY(6px)}}
.mk-switch{display:flex;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:4px;gap:4px}
.mk-switch button{flex:1;font:inherit;font-size:14px;font-weight:700;color:var(--muted);background:none;border:0;border-radius:9px;padding:10px 6px;cursor:pointer}.mk-switch .on{background:#ffffff12;color:var(--ink)}
.mk-slots{display:flex;align-items:stretch;gap:10px}
.mk-slot{flex:1;min-width:0;background:linear-gradient(160deg,#16233a,#0e1526);border:1px solid var(--line);border-radius:16px;padding:14px;text-align:center;display:flex;flex-direction:column;gap:6px}
.mk-slot small{color:var(--muted);font-size:12px;letter-spacing:.1em}
.mk-slot strong{font-size:clamp(22px,6vw,32px);color:var(--yellow);line-height:1.2;word-break:break-word}
.mk-slot em{font-style:normal;font-size:13px;color:var(--muted)}
.mk-x{align-self:center;font-size:24px;color:var(--muted)}
.pop{animation:pop .35s cubic-bezier(.2,1.6,.4,1)}@keyframes pop{from{transform:scale(.7);opacity:.3}}
input[type=text],input:not([type]),textarea,select{font:inherit;font-size:16px;color:var(--ink);background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:10px 12px;min-width:0;width:100%}
input:focus,textarea:focus,select:focus{outline:2px solid #c6ff8a88;outline-offset:1px}
.mk-row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.mk-main,.mk-ghost{display:inline-flex;align-items:center;justify-content:center;gap:6px;font:inherit;font-size:15px;font-weight:700;border-radius:12px;padding:11px 18px;cursor:pointer;text-decoration:none;min-height:46px}
.mk-main{color:#0b1206;background:var(--accent);border:0;box-shadow:0 4px 0 #6f9e3d}
.mk-main:active{transform:translateY(2px);box-shadow:0 2px 0 #6f9e3d}
.mk-main:disabled{opacity:.45;cursor:default}
.mk-ghost{color:var(--ink);background:var(--panel);border:1px solid var(--line)}
.mk-big{width:100%;font-size:18px;min-height:58px}
.mk-next{align-self:flex-end}
.mk-qs{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:8px}
.mk-qs div{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:10px 12px;font-size:14px;line-height:1.6}.mk-qs b{color:var(--accent);font-size:12px}
.mk-answer{display:flex;gap:8px}.mk-answer .mk-main{flex:none}
.mk-tip{font-size:13px;color:var(--muted);line-height:1.7;margin:0}
.mk-field{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted);min-width:0}
.mk-own{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.mk-chips{display:flex;flex-wrap:wrap;gap:6px}
.mk-chip{font:inherit;font-size:13px;color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:6px 12px;cursor:pointer}.mk-chip.on{border-color:var(--pink);color:var(--pink)}
.mk-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:16px}
.mk-tag{display:inline-block;font-size:12px;font-weight:700;color:var(--bg);background:var(--pink);border-radius:6px;padding:2px 9px}
.mk-q{font-size:clamp(18px,4.6vw,23px);font-weight:700;line-height:1.55;margin:10px 0 4px}.mk-q em{font-style:normal;color:var(--yellow)}
.mk-hint{font-size:13px;color:var(--muted);margin:0}
.mk-src{font-size:14px;color:var(--muted);margin:0}
.mk-ems{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:17px;font-weight:700}
.mk-ems input{flex:1 1 150px;font-weight:700}.mk-ems .e{border-color:#c6ff8a66}.mk-ems .m{border-color:#ff8fc066}
.mk-out{font-size:clamp(18px,4.6vw,22px);font-weight:800;line-height:1.5;color:var(--yellow)}
.mk-checks{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:14px}.mk-checks label{display:flex;gap:7px;align-items:center;cursor:pointer}
input[type=checkbox]{width:20px;height:20px;accent-color:var(--accent)}
.mk-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}
#prompt{font-family:ui-monospace,Consolas,monospace;font-size:13px;line-height:1.6;min-height:260px;resize:vertical}
@media (pointer:coarse){#prompt{font-size:16px}}
.mk-quota{margin:0;color:var(--accent);font-weight:700}
.mk-status{margin:0 0 8px;font-weight:700;color:var(--yellow)}
.mk-code{margin:0;height:260px;overflow:auto;background:#05070d;border:1px solid var(--line);border-radius:12px;padding:12px;font:12px/1.5 ui-monospace,Consolas,monospace;color:#9fe6b0;white-space:pre-wrap;word-break:break-all}
.mk-frame{position:relative;width:100%;aspect-ratio:9/14;max-height:78vh;border-radius:16px;overflow:hidden;border:1px solid var(--line);background:#000}
@media (min-width:760px){.mk-frame{aspect-ratio:16/10}}
.mk-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.mk-publish{display:flex;flex-direction:column;gap:12px}.mk-publish h2{margin:0;font-size:19px}
#m-mine h2{font-size:16px;margin:18px 0 8px;color:var(--muted)}
.mk-mine{display:block;padding:10px 12px;border:1px solid var(--line);border-radius:10px;margin-bottom:6px;text-decoration:none;color:var(--ink);background:var(--panel)}
.mk-list{display:flex;flex-direction:column;gap:8px}
.mk-item{display:flex;gap:10px;justify-content:space-between;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:10px 12px;font-size:15px}
.mk-item.pass{border-color:var(--yellow)}.mk-item small{display:block;color:var(--muted);font-size:12px;margin-top:3px}
.mk-ck{display:flex;gap:6px;align-items:center;flex-wrap:wrap;justify-content:flex-end;font-size:12px;color:var(--muted)}.mk-ck label{display:flex;gap:3px;align-items:center}
.mk-ck .mk-ghost{min-height:34px;padding:4px 10px}
.mk-foot{margin-top:34px;font-size:13px;color:var(--muted);text-align:center}
.mk-toast{position:fixed;left:50%;bottom:max(18px,env(safe-area-inset-bottom));transform:translate(-50%,20px);background:var(--accent);color:#0b1206;font-weight:700;padding:10px 16px;border-radius:12px;opacity:0;transition:.2s;pointer-events:none;z-index:10;max-width:90vw;text-align:center}
.mk-toast.on{opacity:1;transform:translate(-50%,0)}
@media (max-width:520px){.mk-answer{flex-direction:column}.mk-own{grid-template-columns:1fr}.mk-slots{gap:6px}.mk-slot{padding:12px 8px}}

/* automatic play test status (maker.js self-test) */
.mk-check[data-kind=ok]{color:#9ff0a8}.mk-check[data-kind=warn]{color:#ffb86b}
.mk-import,.mk-fix{display:flex;flex-direction:column;gap:10px;margin-top:14px}.mk-import h2,.mk-fix h2{margin:0;font-size:18px}
#imp-code,#fix-prompt{width:100%;box-sizing:border-box;background:#05070d;color:#d8e4ff;border:1px solid var(--line);border-radius:12px;padding:10px;font:12px/1.5 ui-monospace,Consolas,monospace;resize:vertical}
.mk-file{cursor:pointer}.mk-status[data-kind=warn]{color:#ffb86b}.mk-status[data-kind=ok]{color:#9ff0a8}
.mk-list-msg{margin:4px 0 0;padding-left:18px}
#imp-msg{white-space:pre-line}
.mk-how{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}
.mk-how>li{display:flex;gap:12px;align-items:flex-start}.mk-how>li>div{flex:1;min-width:0;display:flex;flex-direction:column;gap:8px}
.mk-how>li>b{flex:none;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--accent);color:#0b1206;font-size:15px}
.mk-how p{margin:0;line-height:1.6}.mk-how strong{display:block;font-size:16px}.mk-how span{opacity:.75;font-size:14px}
.mk-ai{min-width:112px}
.mk-extra{margin-top:14px}.mk-extra>summary{cursor:pointer;font-weight:700;color:var(--ink);list-style-position:inside}
.mk-extra[open]>summary{margin-bottom:10px}.mk-extra #m-ready{display:flex;flex-direction:column;gap:8px}.mk-extra #m-ready[hidden]{display:none}
.mk-import .mk-big{width:auto;flex:1}

/* automatic test play: banner over the preview + pulsing outline, and the problem list */
.mk-frame.is-testing{outline:3px solid var(--yellow);outline-offset:2px;animation:mkPulse 1.3s ease-in-out infinite}
@keyframes mkPulse{50%{outline-color:#ffe46b55}}
.mk-testing{position:absolute;inset:0;z-index:2;display:flex;align-items:flex-start;justify-content:center;padding:10px;background:linear-gradient(#000a,transparent 45%);cursor:wait}
.mk-tst-box{display:grid;gap:6px;max-width:min(94%,540px);padding:10px 14px;border-radius:12px;border:1px solid var(--yellow);background:#10131ce8;color:var(--ink);font-size:13.5px;line-height:1.5}
.mk-tst-box b{color:var(--yellow);font-size:17px}
.mk-steps{display:flex;flex-wrap:wrap;gap:6px;margin:2px 0 0;padding:0;list-style:none}
.mk-steps li{padding:3px 10px;border-radius:999px;background:#ffffff14;color:var(--muted);font-size:12.5px}
.mk-steps li.done{background:#2f5d3a;color:#d6ffd9}.mk-steps li.done::before{content:'✓ '}
.mk-steps li.now{background:var(--yellow);color:#1b1b1b;font-weight:700}.mk-steps li.now::after{content:' …'}
.mk-report{margin:10px 0 12px;padding:12px 14px;border-radius:14px;border:1px solid var(--line);background:var(--panel)}
.mk-report[data-kind=warn]{border-color:#ffb86b88;background:#2a1d10}.mk-report[data-kind=ok]{border-color:#9ff0a888;background:#10261a}
.mk-report h3{margin:0 0 10px;font-size:16px}
.mk-report ul{display:grid;gap:10px;margin:0;padding:0;list-style:none}
.mk-report li{display:grid;grid-template-columns:28px 1fr;gap:8px;align-items:start}
.mk-rep-ic{font-size:19px;line-height:1.3;text-align:center}
.mk-rep-t{font-weight:700;line-height:1.45}
.mk-rep-w{margin-top:2px;color:#d9dce6;font-size:14px;line-height:1.55}
.mk-rep-d{margin-top:6px;padding:6px 9px;border-radius:8px;background:#0006;font:12.5px/1.5 ui-monospace,Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;max-height:10em;overflow:auto}
.mk-rep-q{border-left:3px solid var(--yellow);font-family:inherit;font-size:14px;line-height:1.6}
.mk-rep-next{margin:12px 0 0;font-size:14px;color:var(--yellow)}
@media (prefers-reduced-motion:reduce){.mk-frame.is-testing{animation:none}}