/* Solo Router: light + dark themes. Variables flip with [data-theme]; "system" follows the OS. */
:root{
  --bg:#FFFFFF;--panel:#FFFFFF;--panel2:#F7F8FA;--border:#E6E8EC;--border2:#D5D9E0;
  --text:#0E1116;--text2:#3F4652;--muted:#6B7280;
  --accent:#0E8A63;--accent-ink:#FFFFFF;--accent-soft:#E7F5EF;--accent-text:#0B7453;
  --link:#0B7453;--warn:#C2410C;--danger:#C62828;
  --code-bg:#0E1116;--code-text:#D6DAE1;
  --shadow:0 1px 2px rgba(16,24,40,.05),0 1px 3px rgba(16,24,40,.06);
  --logo-ring:#0E1116;
}
[data-theme="dark"]{
  --bg:#0B0C0F;--panel:#111318;--panel2:#15181E;--border:#22262E;--border2:#2E333D;
  --text:#ECEEF2;--text2:#B4BAC6;--muted:#8A919E;
  --accent:#2BB585;--accent-ink:#06120D;--accent-soft:rgba(43,181,133,.12);--accent-text:#4FD1A0;
  --link:#4FD1A0;--warn:#FB923C;--danger:#F87171;
  --code-bg:#07080A;--code-text:#D6DAE1;
  --shadow:none;
  --logo-ring:#3A404C;
}
/* legacy names used in templates */
:root,[data-theme="dark"]{--ink:var(--bg);--ink2:var(--panel);--line:var(--border);--paper:var(--text);--soft:var(--text2);--slate:var(--muted);--signal:var(--accent-text);--route:var(--warn);--sky:var(--link)}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;color-scheme:light}
[data-theme="dark"]{color-scheme:dark}
body{background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
main{flex:1}
a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3{font-family:Inter,system-ui,sans-serif;font-weight:650;letter-spacing:-.022em;line-height:1.15;color:var(--text)}
code,pre,.mono{font-family:'JetBrains Mono',ui-monospace,SFMono-Regular,monospace}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px}
.eyebrow{font-size:13px;font-weight:600;color:var(--accent-text);margin-bottom:10px}
.muted{color:var(--muted)}.soft{color:var(--text2)}.small{font-size:13px}

/* logo */
.brand{display:inline-flex;align-items:center;gap:9px;color:var(--text);font-weight:650;font-size:19px;letter-spacing:-.03em}
.brand:hover{text-decoration:none}
.brand .r{font-weight:450;color:var(--text2)}
.logo-mark{flex:none;display:block}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--border)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:62px;gap:20px}
.nav .links{display:flex;gap:4px;align-items:center}
.nav .links a{color:var(--text2);font-size:14.5px;padding:7px 11px;border-radius:8px}
.nav .links a.on,.nav .links a:hover{color:var(--text);background:var(--panel2);text-decoration:none}
.nav .right{display:flex;gap:8px;align-items:center}
.avatar{width:30px;height:30px;border-radius:50%;border:1px solid var(--border)}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:9px;border:1px solid var(--border);background:var(--panel);color:var(--text2);cursor:pointer}
.icon-btn:hover{color:var(--text);border-color:var(--border2)}
.menu-btn{display:none}
@media(max-width:860px){.nav .links{display:none;position:absolute;top:62px;left:0;right:0;background:var(--bg);flex-direction:column;align-items:stretch;padding:10px 16px 16px;border-bottom:1px solid var(--border);gap:2px}.nav .links.open{display:flex}.menu-btn{display:inline-flex}.hide-sm{display:none!important}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:inherit;font-weight:600;padding:10px 16px;border-radius:10px;font-size:14.5px;border:1px solid transparent;cursor:pointer;line-height:1.2;white-space:nowrap;transition:background .15s,border-color .15s}
.btn:hover{text-decoration:none}
.btn.primary{background:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.07)}
.btn.ghost{background:var(--panel);border-color:var(--border);color:var(--text)}
.btn.ghost:hover{border-color:var(--border2);background:var(--panel2)}
.btn.danger{background:transparent;border-color:var(--border);color:var(--danger)}
.btn.sm{padding:7px 12px;font-size:13.5px;border-radius:8px}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* blocks */
section{padding:72px 0}
.section-line{border-top:1px solid var(--border)}
.card{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:22px;box-shadow:var(--shadow)}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}
.tag{display:inline-block;font-size:11.5px;font-weight:500;padding:2px 8px;border-radius:99px;border:1px solid var(--border);color:var(--muted);white-space:nowrap;background:var(--panel)}
.tag.lime{color:var(--accent-text);border-color:transparent;background:var(--accent-soft)}
.notice{border-radius:10px;padding:12px 14px;font-size:14px;margin-bottom:18px;border:1px solid var(--border);background:var(--panel2)}
.notice.ok{border-color:transparent;background:var(--accent-soft);color:var(--accent-text)}
.notice.err{border-color:color-mix(in srgb,var(--danger) 35%,transparent);color:var(--danger)}

/* hero */
.hero{padding:88px 0 64px}
.hero h1{font-size:clamp(40px,6.4vw,68px);line-height:1.04;font-weight:700;letter-spacing:-.035em}
.hero h1 em{font-style:normal;color:var(--accent-text)}
.hero p.lead{font-size:18.5px;color:var(--text2);max-width:540px;margin:20px 0 28px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
@media(max-width:920px){.hero-grid{grid-template-columns:1fr}.hero{padding:52px 0 40px}}
pre.code{background:var(--code-bg);border:1px solid var(--border);border-radius:12px;padding:18px 20px;font-size:12.8px;line-height:1.75;overflow:auto;color:var(--code-text)}
.k{color:#F59E8B}.s{color:#7EE2B8}.c1{color:#6B7280}.n{color:#93C5FD}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{font-size:13px;border:1px solid var(--border);border-radius:99px;padding:5px 12px;color:var(--text2);display:inline-flex;gap:7px;align-items:center;background:var(--panel)}
.chip b{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block}
h2.sec{font-size:clamp(28px,4vw,38px);margin-bottom:10px}
.feature h3{font-size:17px;margin-bottom:6px}.feature p{color:var(--text2);font-size:14.5px}
.feature .ic{width:36px;height:36px;border-radius:9px;background:var(--accent-soft);color:var(--accent-text);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.stats{display:flex;gap:40px;flex-wrap:wrap;margin-top:34px}
.stats div b{display:block;font-size:26px;font-weight:700;letter-spacing:-.02em}
.stats div span{color:var(--muted);font-size:13.5px}

/* tables */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:12px;background:var(--panel)}
table{width:100%;border-collapse:collapse;font-size:14px}
th{font-weight:500;font-size:12.5px;color:var(--muted);text-align:left;padding:11px 14px;border-bottom:1px solid var(--border);background:var(--panel2);white-space:nowrap}
td{padding:12px 14px;border-bottom:1px solid var(--border);vertical-align:middle}
tr:last-child td{border-bottom:0}
tbody tr:hover td,table tr:hover td{background:color-mix(in srgb,var(--panel2) 60%,transparent)}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
td.num{font-family:'JetBrains Mono',monospace;font-size:13px}
.mid{font-family:'JetBrains Mono',monospace;font-size:12.5px;color:var(--muted)}

/* forms */
input,select,textarea{font:inherit;color:var(--text);background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:10px 12px;width:100%;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
label{display:block;font-size:13px;font-weight:500;color:var(--text2);margin-bottom:6px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}
.row>*{flex:1;min-width:150px}
.row>.btn{flex:0 0 auto}

/* app shell */
.page-head{padding-top:40px;padding-bottom:22px}
.page-head h1{font-size:clamp(28px,4.5vw,36px)}
.stat{font-size:36px;font-weight:700;letter-spacing:-.03em;font-variant-numeric:tabular-nums;margin:4px 0}
.keybox{display:flex;gap:8px;align-items:center;background:var(--panel2);border:1px dashed var(--accent);border-radius:10px;padding:12px 14px;font-family:'JetBrains Mono',monospace;font-size:13px;word-break:break-all}
.amounts{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.amounts button{background:var(--panel);border:1px solid var(--border);color:var(--text);border-radius:9px;padding:8px 14px;font:inherit;font-weight:500;cursor:pointer}
.amounts button.on{border-color:var(--accent);color:var(--accent-text);background:var(--accent-soft)}

/* chat */
.chat{display:grid;grid-template-rows:auto 1fr auto;height:calc(100vh - 62px);max-width:860px;margin:0 auto;padding:0 16px}
.chat-top{display:flex;gap:10px;align-items:center;padding:14px 0;border-bottom:1px solid var(--border);flex-wrap:wrap}
.chat-top select{width:auto;flex:1;min-width:200px}
.msgs{overflow-y:auto;padding:24px 0;display:flex;flex-direction:column;gap:14px}
.msg{max-width:85%;padding:11px 15px;border-radius:14px;white-space:pre-wrap;word-wrap:break-word;font-size:15px;line-height:1.6}
.msg.user{align-self:flex-end;background:var(--panel2);border:1px solid var(--border)}
.msg.ai{align-self:flex-start;background:var(--panel);border:1px solid var(--border)}
.msg.ai .think{color:var(--muted);font-size:13px;border-left:2px solid var(--border);padding-left:10px;margin-bottom:8px;white-space:pre-wrap}
.msg .meta{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--muted);margin-top:8px}
.msg img{max-width:100%;border-radius:10px;display:block}
.composer{display:flex;gap:10px;padding:14px 0 20px;border-top:1px solid var(--border)}
.composer textarea{resize:none;height:50px;max-height:200px}
.empty{margin:auto;text-align:center;color:var(--muted)}
.empty .logo-mark{margin:0 auto 12px}

/* footer */
footer{border-top:1px solid var(--border);padding:52px 0 40px;color:var(--muted);font-size:14px;margin-top:48px;background:var(--bg)}
.foot-grid{display:grid;grid-template-columns:1.3fr repeat(3,1fr);gap:32px}
@media(max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}}
.foot-grid h4{font-size:14px;font-weight:600;color:var(--text);margin-bottom:12px}
.foot-grid a{display:block;color:var(--text2);margin-bottom:9px}
.foot-grid a:hover{color:var(--text);text-decoration:none}
.theme-switch{display:inline-flex;gap:2px;padding:3px;border:1px solid var(--border);border-radius:10px;background:var(--panel2);margin-top:16px}
.theme-switch button{width:30px;height:28px;border:0;border-radius:7px;background:transparent;color:var(--muted);cursor:pointer;display:flex;align-items:center;justify-content:center}
.theme-switch button.on{background:var(--panel);color:var(--accent-text);box-shadow:var(--shadow)}
[data-theme="dark"] .theme-switch button.on{background:var(--border)}

/* prose */
.prose{max-width:760px}
.prose h1{font-size:36px;margin-bottom:8px}
.prose h2{font-size:20px;margin:30px 0 10px}
.prose p,.prose li{color:var(--text2);margin-bottom:10px}
.prose ul{padding-left:20px}
.prose :not(pre)>code{background:var(--panel2);border:1px solid var(--border);padding:1px 6px;border-radius:6px;font-size:.88em;color:var(--text)}
.foot-grid a.brand{display:inline-flex;margin-bottom:0}

/* chat v2: sidebar + collapsible thinking + markdown */
.chat-shell{display:grid;grid-template-columns:268px 1fr;height:calc(100vh - 62px)}
.chat-side{border-right:1px solid var(--border);background:var(--panel2);padding:16px 12px;display:flex;flex-direction:column;gap:6px;min-height:0}
.side-label{font-size:12px;font-weight:600;color:var(--muted);margin:14px 8px 4px}
.chat-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:2px;min-height:0}
.chat-item{display:flex;align-items:center;gap:6px;padding:8px 10px;border-radius:8px;color:var(--text2);font-size:14px;cursor:pointer}
.chat-item:hover{background:var(--border)}
.chat-item.on{background:var(--panel);color:var(--text);box-shadow:var(--shadow);border:1px solid var(--border)}
.chat-item span{flex:1;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.chat-item button{opacity:0;border:0;background:none;color:var(--muted);cursor:pointer;padding:2px 4px;border-radius:6px;font-size:15px;line-height:1}
.chat-item:hover button,.chat-item.on button{opacity:1}
.chat-item button:hover{color:var(--danger)}
.side-note{font-size:12px;color:var(--muted);padding:8px 8px 0}
.side-btn{display:none}
.side-scrim{display:none}
.chat-shell .chat{height:auto;min-height:0;max-width:none;width:100%;padding:0 max(16px,calc((100% - 820px)/2))}
.chat-top select{max-width:420px}
.chat-top .tag{margin-left:auto}
.composer{align-items:flex-end}
.composer textarea{height:auto;min-height:50px;max-height:220px;border-radius:14px;padding:13px 14px}
.composer .btn{height:50px;width:50px;padding:0;border-radius:14px}
.msg.ai{background:transparent;border:0;padding:4px 2px;max-width:100%;white-space:normal}
.msg.user{white-space:pre-wrap}
details.think{margin-bottom:10px}
details.think summary{cursor:pointer;color:var(--muted);font-size:13.5px;list-style:none;display:inline-flex;align-items:center;gap:6px;user-select:none}
details.think summary::-webkit-details-marker{display:none}
details.think summary::before{content:"";width:6px;height:6px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;transform:rotate(-45deg);transition:transform .15s;margin-right:2px}
details.think[open] summary::before{transform:rotate(45deg)}
details.think .tbody{color:var(--muted);font-size:13.5px;border-left:2px solid var(--border);padding:6px 0 6px 12px;margin-top:8px;white-space:pre-wrap}
.thinking-live{animation:pulse 1.4s ease-in-out infinite}
@keyframes pulse{50%{opacity:.45}}
.md p{margin:0 0 10px}.md p:last-child{margin-bottom:0}
.md ul,.md ol{margin:0 0 10px 22px}.md li{margin:3px 0}
.md h1,.md h2,.md h3{font-size:17px;margin:14px 0 8px}
.md pre{background:var(--code-bg);color:var(--code-text);border-radius:10px;padding:12px 14px;overflow:auto;margin:0 0 10px;font-size:13px;line-height:1.6}
.md :not(pre)>code{background:var(--panel2);border:1px solid var(--border);padding:1px 5px;border-radius:5px;font-size:.88em}
.md a{text-decoration:underline}
.chat-empty{margin:auto;text-align:center;color:var(--muted)}
.chat-empty h2{font-size:26px;color:var(--text);margin:14px 0 6px}
@media(max-width:860px){
  .chat-shell{grid-template-columns:1fr}
  .chat-side{position:fixed;top:62px;bottom:0;left:0;width:280px;z-index:30;transform:translateX(-100%);transition:transform .2s}
  .chat-side.open{transform:none}
  .side-scrim.open{display:block;position:fixed;inset:62px 0 0 0;background:rgba(0,0,0,.35);z-index:25}
  .side-btn{display:inline-flex}
}
.plogo{flex:none;width:30px;height:30px;border-radius:8px;background:#fff;border:1px solid var(--border);display:inline-flex;align-items:center;justify-content:center;color:#0E1116}
.plogo img{width:18px;height:18px;display:block}
.plogo-txt{font-weight:700;font-size:13px}
.mcell{display:flex;align-items:center;gap:12px}
details.think{border-left:0!important;padding-left:0!important;white-space:normal!important;margin-left:0}
.post-body table{margin:0 0 18px;border:1px solid var(--border);border-radius:10px;overflow:hidden;display:block;overflow-x:auto}
.post-body th,.post-body td{padding:9px 12px}
.post-body pre{background:var(--code-bg);color:var(--code-text);border-radius:10px;padding:14px 16px;overflow:auto;margin:0 0 16px;font-size:13px;line-height:1.65}
.post-body h3{font-size:17px;margin:22px 0 8px}
.post-body ol{padding-left:22px}
.composer textarea{overflow-y:hidden;scrollbar-width:thin}
.foot-5{grid-template-columns:1.2fr repeat(4,1fr)}
@media(max-width:900px){.foot-5{grid-template-columns:1fr 1fr}}
.makers{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;margin-top:24px}
.maker{display:flex;align-items:center;gap:12px;color:var(--text);padding:16px 18px}
.maker:hover{text-decoration:none;border-color:var(--border2)}
.step{width:30px;height:30px;border-radius:50%;background:var(--accent-soft);color:var(--accent-text);font-weight:700;display:flex;align-items:center;justify-content:center;margin-bottom:12px}
.steps h3{font-size:17px;margin-bottom:6px}
@media(max-width:860px){.chat-top{flex-wrap:nowrap}.chat-top select{min-width:0;flex:1 1 auto;width:0;max-width:none}.chat-top .tag{flex:none}}