@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Noto+Sans+SC:wght@400;500;600;700&display=swap');
:root{font-family:'DM Sans','Noto Sans SC',sans-serif;color:#252a2b;background:#f6f7f5;font-synthesis:none;font-optical-sizing:auto}*{box-sizing:border-box}body{margin:0;min-height:100vh}button,input,textarea{font:inherit}button{cursor:pointer}.top{height:64px;border-bottom:1px solid #e4e7e4;background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 max(28px,calc((100vw - 1180px)/2))}.brand{font-weight:700;color:#202627;text-decoration:none;font-size:17px}.brand span{font-size:12px;color:#818b88;font-weight:400;margin-left:10px}#userbar{display:flex;align-items:center;gap:12px;color:#586260;font-size:13px}.auth{min-height:calc(100vh - 64px);max-width:1100px;margin:auto;display:grid;grid-template-columns:1fr 390px;align-items:center;gap:120px;padding:72px 32px}.intro{max-width:520px}.eyebrow{font-size:11px;letter-spacing:1.4px;font-weight:700;color:#568678}.intro h1{font-size:58px;line-height:1.18;letter-spacing:0;margin:18px 0}.intro>p:last-child{color:#6b7571;font-size:16px}.auth form{background:#fff;border:1px solid #e5e8e5;border-radius:6px;padding:30px;box-shadow:0 10px 36px #1d32220c}.auth h2{margin:0 0 24px;font-size:21px}.auth label,.panel label,.upload label{display:block;font-size:13px;font-weight:600;margin:15px 0;color:#4b5552}.auth input,.panel input,.panel textarea,.upload input:not([type=file]),.upload textarea{display:block;width:100%;margin-top:7px;border:1px solid #d9dfdc;border-radius:4px;background:#fff;padding:11px 12px;outline:none}.auth input:focus,.panel input:focus,.panel textarea:focus,.upload textarea:focus,.composer textarea:focus{border-color:#508a78;box-shadow:0 0 0 3px #508a781a}.primary,.secondary{border:0;border-radius:4px;background:#28745f;color:white;padding:11px 16px;font-weight:600}.primary:hover{background:#205f4e}.primary:disabled{opacity:.6;cursor:wait}.auth .primary{width:100%;margin-top:8px}.textbtn,.back{border:0;background:none;color:#28745f;padding:10px 0}.auth .textbtn{display:block;margin:8px auto 0}.error{color:#b4463f;font-size:13px;min-height:18px}.icon{border:0;background:transparent;color:#697571;font-size:20px;padding:6px 10px}.workspace{max-width:1120px;margin:0 auto;padding:54px 28px}.heading{display:flex;justify-content:space-between;align-items:center;margin:22px 0}.heading h1{font-size:32px;margin:5px 0}.status,.muted{color:#78827f;font-size:13px}.upload{border:1px solid #dfe5e1;background:#fff;padding:20px;margin:24px 0;border-radius:5px}.upload input[type=file]{display:block;margin-top:10px;font-size:13px}.hidden{display:none!important}.worldlist{margin-top:25px;border-top:1px solid #e0e5e1}.world{display:flex;align-items:center;border-bottom:1px solid #e0e5e1;padding:17px 4px}.worldopen{flex:1;border:0;background:none;text-align:left;display:flex;flex-direction:column;gap:6px}.worldtitle{font-size:16px;font-weight:600;color:#252a2b}.meta{font-size:12px;color:#818b87}.empty{text-align:center;color:#74807b;padding:80px 20px}.empty span{font-size:27px;color:#4b8b74}.empty h2{font-size:17px;color:#303937}.empty p{font-size:13px}.detailgrid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:22px;margin-top:26px}.panel{background:#fff;border:1px solid #e0e5e1;border-radius:5px;padding:22px}.panel h2{font-size:17px;margin:0 0 18px}.panel textarea{resize:vertical;line-height:1.6}.secondary{background:#e9f2ee;color:#28745f}.saveitem{display:flex;align-items:center;border-top:1px solid #edf0ed}.saveopen{border:0;background:none;text-align:left;flex:1;padding:13px 4px;display:flex;flex-direction:column;gap:5px;color:#29312e}.saveopen small{color:#838d89}.game{height:calc(100vh - 64px);max-width:900px;margin:auto;display:flex;flex-direction:column;background:white;border-left:1px solid #e7eae7;border-right:1px solid #e7eae7}.gamehead{height:64px;flex:0 0 auto;border-bottom:1px solid #e7eae7;display:flex;align-items:center;padding:0 20px;gap:20px}.gamehead>div{flex:1;display:flex;flex-direction:column;font-size:13px}.gamehead>div span{font-size:11px;color:#83908a;margin-top:3px}.chat{flex:1;min-height:0;overflow:auto;padding:25px clamp(18px,7vw,72px);overscroll-behavior:contain;-webkit-overflow-scrolling:touch}.message{max-width:80%;margin:0 0 18px;padding:12px 15px;border-radius:5px;line-height:1.7;white-space:pre-wrap}.message small{font-size:11px;color:#78837d}.message p{margin:5px 0 0}.theirs{background:#f0f4f1}.mine{margin-left:auto;background:#e6f3ee}.message .body{margin:5px 0 0}.think{margin:9px 0 0;border-left:2px solid #cfdbd4;padding-left:10px}.think summary{cursor:pointer;font-size:11px;color:#78837d;list-style:none;user-select:none}.think summary::-webkit-details-marker{display:none}.think summary::before{content:'▸ '}.think[open] summary::before{content:'▾ '}.think pre{margin:6px 0 0;white-space:pre-wrap;word-break:break-word;font:inherit;font-size:12.5px;line-height:1.6;color:#8a9490;max-height:280px;overflow:auto}.typing{color:#9aa5a0;animation:blink 1s steps(2) infinite}@keyframes blink{50%{opacity:0}}.composer{flex:0 0 auto;min-width:0;border-top:1px solid #e6eae6;padding:14px 20px 6px;display:grid;grid-template-columns:1fr auto;align-items:end;gap:10px}.composer textarea{min-width:0;width:100%;resize:none;border:1px solid #dce2de;border-radius:4px;padding:8px 12px;outline:none;line-height:24px;font-size:15px;height:42px;max-height:160px;overflow-y:auto}.composer button{height:42px;padding:0 16px;font-size:15px;line-height:24px;display:inline-flex;align-items:center;justify-content:center}.composer .error{grid-column:1/-1;margin:0;min-height:12px}.back{font-size:13px}@media(max-width:720px){.auth{grid-template-columns:1fr;gap:30px;padding:44px 22px}.intro h1{font-size:43px}.auth form{padding:24px}.detailgrid{grid-template-columns:1fr}.workspace{padding:35px 18px}.game{height:calc(100vh - 64px);height:calc(var(--appvh,100dvh) - 64px)}.message{max-width:92%}.top{padding:0 16px}
/* 手机端：placeholder 必须单行，否则折行会把空输入框撑成两行、和右侧按钮对不齐；
   font-size 设为 16px 避免 iOS Safari 聚焦时自动放大页面 */
.composer{padding:10px 12px 4px;gap:8px}
.composer textarea,.composer button{font-size:16px;line-height:24px}
.composer textarea::placeholder{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}}

/* 账号设置弹窗 */
dialog.acctdlg{border:1px solid #e2e7e3;border-radius:10px;padding:26px 28px;width:min(420px,calc(100vw - 36px));background:#fff;box-shadow:0 18px 50px rgba(24,40,32,.18)}
dialog.acctdlg::backdrop{background:rgba(24,40,32,.34)}
dialog.acctdlg h3{margin:0 0 18px;font-size:17px;font-weight:600}
dialog.acctdlg hr{border:0;border-top:1px solid #eef1ee;margin:22px 0}
dialog.acctdlg label{display:block;margin-bottom:14px;font-size:13px;color:#55605b}
dialog.acctdlg label input{display:block;width:100%;box-sizing:border-box;margin-top:6px;padding:9px 12px;border:1px solid #dce2de;border-radius:4px;font-size:15px;outline:none}
dialog.acctdlg label input:focus{border-color:#8fa89a}
dialog.acctdlg .primary{width:100%}
dialog.acctdlg .error{min-height:18px;margin:12px 0 6px}
dialog.acctdlg .textbtn{display:block;margin:0 auto}

/* 顶栏右侧的用户名按钮：.textbtn 默认 display:block;margin:8px auto 0（给表单用的），
   在这里要覆盖成行内，否则会把顶栏撑高。#userbar 自身已有 display:flex;gap:12px，不重复声明。 */
#userbar .textbtn{display:inline-block;margin:0;padding:6px 10px;border-radius:4px;color:#55605b;font-size:13px;line-height:1.2}
#userbar .textbtn:hover{background:#f1f4f2;color:#202627}
#userbar #account{max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 上传表单的「上传文件 / 直接输入」切换：.textbtn 默认是整块下推的样式，
   这里要压成并排的两个小标签，选中态用下划线而不是背景色，避免和主按钮抢注意力。 */
.upload .modes{display:flex;gap:6px;margin:16px 0 0}
.upload .modes .textbtn{display:inline-block;margin:0;padding:6px 12px;border-radius:4px;font-size:13px;color:#6b7571;background:#f2f4f2}
.upload .modes .textbtn.on{background:#28745f;color:#fff}
.upload textarea{min-height:180px;resize:vertical;line-height:1.6;font-family:ui-monospace,SFMono-Regular,'DM Sans','Noto Sans SC',monospace}
.upload .hidden{display:none}

/* markdown */
.message .body{white-space:normal;word-break:break-word}
.message .body>*:first-child{margin-top:6px}
.message .body>*:last-child{margin-bottom:0}
.message .body p{margin:8px 0}
.message .body h1,.message .body h2,.message .body h3,.message .body h4,.message .body h5,.message .body h6{margin:14px 0 6px;line-height:1.35;font-weight:700;letter-spacing:0}
.message .body h1{font-size:19px}.message .body h2{font-size:17px}.message .body h3{font-size:15.5px}
.message .body h4,.message .body h5,.message .body h6{font-size:14.5px;color:#414b48}
.message .body ul,.message .body ol{margin:8px 0;padding-left:22px}
.message .body li{margin:3px 0}
.message .body li>p{margin:0}
.message .body blockquote{margin:10px 0;padding:6px 12px;border-left:3px solid #cfdbd4;background:#f4f7f5;border-radius:0 4px 4px 0;color:#4d5854}
.message .body blockquote p{margin:4px 0}
.message .body hr{border:0;border-top:1px solid #e2e7e4;margin:14px 0}
.message .body a{color:#28745f;text-decoration:underline;text-underline-offset:2px}
.message .body strong{font-weight:700;color:#1f2624}
.message .body del{color:#8a9490}
.message .body code{background:#eef2f0;border-radius:3px;padding:1px 5px;font-size:.92em;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.message .body pre.md-code{margin:10px 0;background:#1f2624;color:#e6ebe8;border-radius:5px;padding:11px 13px;overflow:auto;max-height:340px}
.message .body pre.md-code code{background:none;padding:0;color:inherit;font-size:12.5px;line-height:1.6;white-space:pre}
.message .body pre.md-code[data-lang]::before{content:attr(data-lang);display:block;font-size:10.5px;letter-spacing:.5px;color:#8b9791;margin-bottom:6px;text-transform:uppercase}
.message .body .md-table{margin:10px 0;overflow-x:auto;border:1px solid #e2e7e4;border-radius:4px}
.message .body table{border-collapse:collapse;width:100%;font-size:13px}
.message .body th,.message .body td{border:1px solid #e2e7e4;padding:6px 10px;text-align:left;vertical-align:top}
.message .body th{background:#f4f7f5;font-weight:600;white-space:nowrap}
.message .body tbody tr:nth-child(even){background:#fafbfa}
.message.mine .body code,.message.mine .body pre{background:#cfe4db;color:#16352b}
/* latex / katex */
.message .body .math-inline{display:inline-block;vertical-align:baseline;max-width:100%}
/* 块级公式左对齐：模型常用 $$...$$ 画整块面板卡片，居中会让超宽内容溢出被裁 */
.message .body .math-block{display:block;margin:12px 0;text-align:left;overflow-x:auto;overflow-y:hidden}
.message .body .math-block .katex-display{margin:0;text-align:left}
.message .body .math-block .katex-display>.katex{text-align:left}
.message .body .katex{font-size:1.02em}
.message .body .math-fallback{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em;background:#eef2f0;border-radius:3px;padding:1px 5px;color:#8a5a2b;word-break:break-all}
/* 公式修不好时降级成的整块文字面板：要按普通正文排版，
   word-break:break-all 会把中文断得七零八落，行高也挤，所以单独覆盖 */
.message .body .math-fallback.math-block{display:block;font-family:inherit;font-size:.95em;line-height:1.75;white-space:pre-wrap;word-break:normal;overflow-wrap:anywhere;padding:12px 14px;margin:12px 0;border-radius:5px;border-left:3px solid #c9b49a}
.message.mine .body .math-fallback{background:#cfe4db;color:#4d3a1a}
/* 手机端对局页布局
   坑一：基础样式 body{min-height:100vh} 与 height 并存时浏览器取较大值，
         手机 visualViewport 高度常小于 100vh，body 被撑高 → overflow:hidden 把底部裁掉，看起来就是"对话溢出"。
         必须显式 min-height:0 才能让 height:var(--appvh) 真正生效。
   坑二：别用 position:fixed 锁对局页 —— iOS 键盘弹起时 visualViewport 变小但 layout viewport 不变，
         fixed 元素不会跟随，输入框会被键盘盖住。保持文档流，靠 --appvh 实时刷新高度。
   高度链：#app(100%) → #main(flex:1) → .game(flex:1)，每一级都要 min-height:0，否则 flex 子项不肯收缩。 */
body.game-mode{height:var(--appvh,100dvh);min-height:0;overflow:hidden;overscroll-behavior:none}
body.game-mode #app{height:100%;min-height:0;display:flex;flex-direction:column;overflow:hidden}
body.game-mode .top{flex:0 0 64px}
body.game-mode #main{flex:1;min-height:0;display:flex;flex-direction:column;overflow:hidden}
body.game-mode .game{flex:1;min-height:0;height:auto;max-height:none;margin:0 auto;width:100%;display:flex;flex-direction:column;overflow:hidden}
body.game-mode .composer{flex:0 0 auto}
body.game-mode .chat{flex:1;min-height:0;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch}