@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@400;500;600;700&family=Noto+Sans+JP:wght@400;500;600;700&display=swap');
:root{--bg:oklch(17% .012 65);--surface:oklch(21% .014 65);--fg:oklch(92% .015 80);--muted:oklch(70% .018 75);--border:oklch(32% .015 65);--accent:oklch(78% .12 75);--yes:oklch(78% .08 165);--no:oklch(78% .08 30);--display:'Noto Serif JP','Yu Mincho',serif;--body:'Noto Sans JP','Yu Gothic',Meiryo,sans-serif;--mono:Consolas,monospace;color-scheme:dark}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:14px/1.8 var(--body)}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer;color:inherit}a{color:inherit;text-decoration:none}button:disabled{opacity:.45;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:4px}button{border:1px solid var(--border);background:transparent;border-radius:6px;min-height:44px;padding:9px 18px}button:hover:not(:disabled),a.button:hover{border-color:var(--accent);background:color-mix(in oklch,var(--accent) 9%,transparent)}.primary{background:var(--accent);border-color:var(--accent);color:var(--bg);box-shadow:0 4px 18px oklch(0% 0 0/.2);font-weight:700}.primary:hover:not(:disabled){background:color-mix(in oklch,var(--accent) 85%,white)}.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 22px;border:1px solid var(--border);border-radius:6px}.text-button{border:0;padding-inline:8px;color:var(--muted)}.small{font-size:12px;color:var(--muted)}.mono{font-family:var(--mono)}h1,h2,h3,p{margin-top:0}h1,h2,h3{font-family:var(--display);font-weight:500}h1{line-height:1.5}h2{font-size:26px}h3{font-size:23px}.muted{color:var(--muted)}.topbar{height:88px;border-bottom:1px solid var(--border);padding:0 5vw;display:flex;align-items:center;gap:38px}.brand{font-family:var(--display);font-size:23px;letter-spacing:.12em;white-space:nowrap;display:flex;align-items:center;gap:12px}.mark{width:31px;height:23px;border:1px solid var(--accent);border-top:0;border-radius:0 0 24px 24px;display:inline-block;position:relative}.mark:before{content:'∿';position:absolute;top:-25px;left:9px;color:var(--accent);font-size:26px}.topnav{display:flex;gap:28px;margin-left:24px;align-self:stretch}.topnav a{display:flex;align-items:center;color:var(--muted);font-size:13px;border-bottom:2px solid transparent}.topnav .active{border-color:var(--accent);color:var(--fg)}.topright{margin-left:auto;display:flex;align-items:center;gap:16px}.avatar{width:35px;height:35px;background:var(--surface);border:1px solid var(--border);border-radius:50%;display:inline-grid;place-items:center;font-size:12px}.page{max-width:1300px;margin:auto;padding:0 5vw 40px}.hero{display:grid;grid-template-columns:1.5fr 1fr;align-items:center;padding:62px 0 52px;min-height:335px;position:relative}.eyebrow{font-size:11px;letter-spacing:.2em;color:var(--accent);margin-bottom:20px}.hero h1{font-size:clamp(30px,3.4vw,47px);letter-spacing:.08em;margin-bottom:19px}.hero p{color:var(--muted);font-size:13px;line-height:2.1}.emblem{width:220px;height:220px;justify-self:center;border:1px solid var(--border);border-radius:50%;display:grid;place-items:center;position:relative}.emblem:before{content:'';position:absolute;inset:15px;border:1px solid var(--border);border-radius:50%}.emblem:after{content:'水平思考ゲーム';position:absolute;bottom:29px;font-family:var(--display);font-size:10px;letter-spacing:.17em;color:var(--muted)}.emblem span{font-family:var(--display);font-size:125px;line-height:1;transform:translateY(-20px);color:var(--accent);font-style:italic}.section-head{display:flex;gap:20px;align-items:baseline;justify-content:space-between;margin-bottom:22px}.section-head h2{margin:0;font-size:23px}.section-head h2 small{font:11px var(--body);margin-left:17px;color:var(--muted)}.feature{display:grid;grid-template-columns:1.1fr 1.35fr;background:var(--surface);border:1px solid var(--border);border-radius:10px;overflow:hidden}.feature-art{min-height:290px;position:relative;overflow:hidden;background:oklch(23% .027 75);display:grid;place-items:center}.cup-scene{width:210px;height:210px;position:relative;transform:rotate(-13deg)}.saucer{position:absolute;width:200px;height:140px;left:5px;top:60px;border-radius:50%;background:oklch(35% .028 75);box-shadow:0 24px 30px oklch(0% 0 0/.3),inset 0 0 0 10px oklch(39% .024 75),inset 0 0 0 12px oklch(46% .025 75)}.cup{position:absolute;width:117px;height:111px;top:49px;left:47px;border-radius:50%;background:oklch(17% .02 65);border:10px solid oklch(65% .03 75);box-shadow:0 9px 0 oklch(47% .025 75),inset 0 3px 7px oklch(0% 0 0/.5)}.cup:after{content:'';position:absolute;width:34px;height:22px;border:8px solid oklch(60% .03 75);right:-40px;top:32px;border-radius:8px}.steam{position:absolute;left:88px;top:0;font:70px var(--display);color:oklch(80% .02 75/.22);transform:rotate(15deg)}.art-label{position:absolute;left:24px;bottom:20px;font:10px var(--mono);letter-spacing:.18em;color:var(--muted)}.feature-content{padding:32px 38px}.badge{font-size:10px;border:1px solid var(--border);border-radius:3px;padding:4px 8px;display:inline-block;color:var(--muted)}.feature h3{font-size:29px;margin:15px 0 12px}.feature-content p{font-size:13px;color:var(--muted);max-width:490px}.feature-bottom{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:23px}.meta{font-size:11px;color:var(--muted)}.library{padding-top:42px}.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}.filter{border:0;min-height:38px;padding:6px 16px;color:var(--muted);border-radius:30px}.filter.active{background:var(--fg);color:var(--bg)}.search{margin-left:auto;border:1px solid var(--border);background:transparent;color:var(--fg);border-radius:6px;padding:9px 13px;max-width:220px;min-width:0}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:19px}.puzzle-card{border:1px solid var(--border);border-radius:8px;padding:25px;min-width:0;display:flex;flex-direction:column;transition:transform .18s,background .18s}.puzzle-card:hover{transform:translateY(-3px);background:var(--surface)}.card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.card-number{font:32px var(--display);color:var(--muted)}.puzzle-card h3{font-size:20px;margin-bottom:13px}.puzzle-card p{color:var(--muted);font-size:12px;line-height:1.9;flex:1}.card-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--border);padding-top:15px;margin-top:8px}.card-bottom button{padding:0 8px;border:0;font-size:12px}.invite-strip{margin:32px 0;padding:24px 28px;border-block:1px solid var(--border);display:flex;justify-content:space-between;gap:20px;align-items:center}.invite-strip h3{font-size:19px;margin-bottom:5px}.invite-strip p{margin:0;font-size:12px;color:var(--muted)}footer{display:flex;justify-content:space-between;color:var(--muted);font-size:10px;padding:15px 0;gap:16px}.breadcrumb{padding:26px 0;color:var(--muted);font-size:12px}.game-layout{display:grid;grid-template-columns:340px minmax(0,1fr);gap:28px}.case-panel{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:29px;align-self:start}.case-panel h1{font-size:27px;margin:20px 0}.case-panel .story{font-family:var(--display);font-size:16px;line-height:2.15}.case-tools{border-top:1px solid var(--border);margin-top:25px;padding-top:20px;display:flex;flex-wrap:wrap;gap:10px}.case-tools button{font-size:12px;flex:1}.notepad{margin-top:23px}.notepad textarea{background:transparent;width:100%;border:1px solid var(--border);color:var(--fg);padding:10px;resize:vertical;min-height:120px;border-radius:5px;font-size:12px}.chat-panel{border:1px solid var(--border);border-radius:8px;overflow:hidden;min-width:0;display:flex;flex-direction:column}.chat-head{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border-bottom:1px solid var(--border);gap:12px}.host{display:flex;gap:12px;align-items:center}.host .avatar{color:var(--accent)}.chat-log{height:350px;overflow:auto;padding:24px;display:flex;flex-direction:column;gap:16px;scrollbar-color:var(--border) transparent}.message{max-width:91%;padding:14px 17px;background:var(--surface);border:1px solid var(--border);border-radius:0 9px 9px;font-size:13px;overflow-wrap:anywhere}.message.user{align-self:flex-end;border-radius:9px 0 9px 9px;background:oklch(26% .022 75)}.message strong{display:block;font-size:10px;color:var(--muted);margin-bottom:5px}.answer-yes{color:var(--yes)}.answer-no{color:var(--no)}.composer{padding:19px 24px;border-top:1px solid var(--border)}.suggestions{display:flex;gap:7px;flex-wrap:wrap;margin:10px 0 16px}.suggestions button{font-size:11px;padding:6px 10px;min-height:44px}.input-row{display:flex;gap:10px}.input-row input{width:100%;min-width:0;padding:12px;color:var(--fg);background:var(--bg);border:1px solid var(--border);border-radius:6px}.input-row button{flex-shrink:0}.room-banner{padding:12px 20px;margin-bottom:20px;border:1px solid var(--border);border-radius:6px;display:flex;justify-content:space-between;align-items:center;gap:12px}.room-banner[hidden]{display:none}.result{max-width:760px;margin:50px auto}.result-head{text-align:center;padding-bottom:32px}.result-head h1{font-size:34px}.result-seal{font:52px var(--display);color:var(--accent);margin-bottom:15px}.explanation{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:36px}.explanation p{font-family:var(--display);font-size:17px;line-height:2.1}.stats{display:grid;grid-template-columns:1fr 1fr;border-block:1px solid var(--border);margin:24px 0}.stat{padding:20px;text-align:center}.stat:first-child{border-right:1px solid var(--border)}.stat b{font:25px var(--mono);display:block}.result-actions{display:flex;justify-content:center;gap:14px;margin-top:28px}dialog{background:var(--surface);color:var(--fg);border:1px solid var(--border);border-radius:12px;padding:30px;width:min(500px,calc(100% - 32px));max-height:85dvh;overflow:auto}dialog::backdrop{background:oklch(5% 0 0/.8);backdrop-filter:blur(5px)}dialog h2{font-size:25px}dialog p{color:var(--muted)}dialog label{display:block;margin:18px 0 7px}dialog input,dialog textarea,dialog select{width:100%;padding:12px;background:var(--bg);border:1px solid var(--border);color:var(--fg);border-radius:6px}dialog textarea{min-height:110px;resize:vertical}.dialog-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:23px}.close{float:right;min-width:44px;padding:5px}.feedback{color:var(--accent);font-size:12px;min-height:20px;margin-top:9px}.empty{padding:30px;color:var(--muted);text-align:center}.hidden,[hidden]{display:none!important}
@media(min-width:1500px){.page{padding-inline:35px}}@media(max-width:900px){.topnav{margin-left:0;gap:18px}.topbar{gap:20px}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.feature-content{padding:25px}.game-layout{grid-template-columns:290px minmax(0,1fr);gap:18px}.case-panel{padding:22px}.chat-head{padding:16px}.chat-log,.composer{padding:18px}}
@media(max-width:700px){.topbar{height:72px;padding:0 20px}.brand{font-size:19px}.topnav{display:none}.topright>.small{display:none}.topright{gap:6px}.topright button{font-size:11px;padding:6px}.page{padding:0 20px 28px}.hero{grid-template-columns:1fr;padding:38px 0 24px;min-height:auto}.hero h1{font-size:31px}.hero p{font-size:12px}.emblem{display:none}.eyebrow{margin-bottom:12px}.section-head h2{font-size:20px}.section-head h2 small{display:none}.feature{grid-template-columns:1fr}.feature-art{min-height:150px}.cup-scene{transform:rotate(-13deg) scale(.7);height:150px;margin-top:-25px}.art-label{font-size:9px;bottom:12px;left:16px}.feature-content{padding:23px}.feature h3{font-size:25px}.feature-bottom{align-items:flex-start;flex-direction:column}.feature-bottom .primary{width:100%}.library{padding-top:30px}.filters{gap:3px}.filter{padding:6px 12px}.search{max-width:none;width:100%;margin-top:10px}.grid{grid-template-columns:1fr}.puzzle-card{padding:22px}.card-top{margin-bottom:10px}.invite-strip{padding:22px 0;align-items:flex-start;flex-direction:column}.invite-strip button{width:100%}footer{flex-direction:column;gap:4px}.game-layout{display:flex;flex-direction:column}.case-panel{width:100%}.case-panel h1{font-size:25px;margin:15px 0}.case-panel .story{font-size:15px}.notepad{display:none}.chat-log{height:330px}.composer{padding:15px}.input-row{gap:6px}.input-row button{padding:10px}.room-banner{flex-wrap:wrap}.result{margin-top:25px}.result-head h1{font-size:27px}.explanation{padding:24px}.explanation p{font-size:16px}.result-actions{flex-direction:column}.breadcrumb{padding:19px 0}}

/* --- AI GM integration additions --- */
.meter{position:relative;width:84px;height:8px;border:1px solid var(--border);border-radius:4px;overflow:hidden;background:color-mix(in oklch,var(--surface) 75%,black);flex:none;align-self:center}
.meter i{position:absolute;inset:0;width:0%;background:linear-gradient(90deg,color-mix(in oklch,var(--yes) 65%,var(--accent)),var(--accent));transition:width .5s ease}
.message.thinking{opacity:.55;font-style:italic}
.answer-mid{color:var(--muted)}