:root{
  --bg:#fff;--fg:#0a0a0a;--mut:#6f6f6f;--line:#e8e8e8;--sub:#f6f6f6;--hov:#fafafa;--inv:#fff;--danger:#b42318;
  --font:"Inter","Noto Sans Thai",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Consolas,monospace;
  --sh:0 1px 2px rgba(0,0,0,.04),0 12px 40px rgba(0,0,0,.12);
  color-scheme:light;
}
[data-theme=dark]{
  --bg:#0a0a0a;--fg:#f4f4f4;--mut:#8f8f8f;--line:#242424;--sub:#131313;--hov:#0f0f0f;--inv:#0a0a0a;--danger:#ff7a6e;
  --sh:0 12px 40px rgba(0,0,0,.7);color-scheme:dark;
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--fg);font:14px/1.6 var(--font);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
h1{font-size:22px;line-height:1.3;font-weight:600;margin:0;letter-spacing:-.01em}
h3{font-size:16px;font-weight:600;margin:0 0 6px}
p{margin:0}
.muted{color:var(--mut)}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.i{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round;flex:none}
:focus-visible{outline:2px solid var(--fg);outline-offset:2px}

/* top bar */
.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top-in{max-width:1040px;margin:0 auto;padding:0 20px;height:56px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;letter-spacing:-.01em}
.brand .brand-i{width:28px;height:28px;padding:6px;border-radius:8px;background:var(--fg);color:var(--inv)}
.top-r{display:flex;gap:4px}
.wrap{max-width:1040px;margin:0 auto;padding:36px 20px 80px}
.banner{display:flex;gap:10px;align-items:center;justify-content:center;padding:9px 16px;background:var(--fg);color:var(--inv);font-size:13px}

/* buttons and inputs */
.btn{height:36px;padding:0 14px;border-radius:8px;border:1px solid var(--fg);background:var(--fg);color:var(--inv);
  display:inline-flex;align-items:center;justify-content:center;gap:8px;font:500 13.5px var(--font);cursor:pointer;white-space:nowrap;transition:opacity .15s,border-color .15s,background .15s}
.btn:hover{opacity:.86}
.btn.ghost{background:transparent;color:var(--fg);border-color:var(--line)}
.btn.ghost:hover{opacity:1;border-color:var(--fg)}
.btn.danger{background:transparent;color:var(--danger);border-color:var(--line)}
.btn.danger:hover{opacity:1;border-color:var(--danger)}
.btn.full{width:100%}
.btn:disabled{opacity:.4;cursor:default}
.icon-btn{width:34px;height:34px;border-radius:8px;border:0;background:transparent;color:var(--fg);display:inline-grid;place-items:center;cursor:pointer}
.icon-btn:hover{background:var(--sub)}
.input{width:100%;height:38px;padding:0 12px;border-radius:8px;border:1px solid var(--line);background:var(--bg);color:var(--fg);font:14px var(--font)}
.input:hover{border-color:var(--mut)}
.input:focus{outline:none;border-color:var(--fg)}
.lbl{display:block;font-size:12.5px;font-weight:500;margin:16px 0 6px}
.err{color:var(--danger);font-size:13px;min-height:20px;margin:6px 0 10px}

/* page head */
.head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.head .muted{margin-top:4px}
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:4px;font-size:20px;font-weight:600;letter-spacing:-.01em}
.crumbs a{padding:0 2px;border-radius:4px}
.crumbs a:hover{text-decoration:underline}
.crumbs .i{width:15px;height:15px;color:var(--mut)}
.crumbs .cur{color:var(--fg)}
.badge{display:inline-flex;align-items:center;gap:6px;height:22px;padding:0 8px;border:1px solid var(--line);border-radius:999px;font-size:12px;color:var(--mut);font-weight:500;white-space:nowrap}
.badge .i{width:12px;height:12px}
.tools{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.tools .sp{flex:1}

/* lists */
.list{border:1px solid var(--line);border-radius:12px;overflow:hidden}
.row{display:grid;grid-template-columns:minmax(160px,1.1fr) 1.4fr 130px 72px;gap:12px;align-items:center;padding:0 14px;min-height:46px;border-top:1px solid var(--line);cursor:pointer}
.row:first-child{border-top:0}
.row:hover{background:var(--hov)}
.row .nm{display:flex;align-items:center;gap:10px;min-width:0;font-weight:500}
.row .nm span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.row .nm .i{color:var(--mut)}
.row .nm .i.dir{color:var(--fg)}
.row .ms,.row .tm{color:var(--mut);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}
.row .tm{text-align:right}
.row .ac{display:flex;justify-content:flex-end;gap:0;opacity:0}
.row:hover .ac,.row:focus-within .ac{opacity:1}
.row .icon-btn{width:30px;height:30px}
.row.proj{grid-template-columns:minmax(160px,1.4fr) 110px 150px 130px;min-height:58px}
.row.up .nm{color:var(--mut)}
.drop.over .list{border-color:var(--fg);background:var(--sub)}
.empty{padding:56px 20px;text-align:center;color:var(--mut)}
.empty .i{width:28px;height:28px;margin-bottom:10px;stroke-width:1.4}
.empty b{display:block;color:var(--fg);font-weight:600;margin-bottom:2px}
.hint{margin-top:10px;color:var(--mut);font-size:12.5px;display:flex;gap:8px;align-items:center}
.sect{margin-top:44px}
.sect h3{margin-bottom:4px}
.sect .tools{margin:14px 0 0}

/* editor */
.bar{display:flex;gap:8px;margin-bottom:12px;flex-wrap:wrap}
.bar .input{flex:1;min-width:220px;font:12.5px var(--mono)}
.editor{display:grid;grid-template-columns:auto 1fr;border:1px solid var(--line);border-radius:12px;overflow:hidden;height:calc(100vh - 330px);min-height:340px;background:var(--bg)}
.editor:focus-within{border-color:var(--fg)}
.gutter{background:var(--sub);color:var(--mut);padding:14px 12px 34px 14px;text-align:right;overflow:hidden;user-select:none;border-right:1px solid var(--line)}
.gutter pre,.editor textarea{font:13px/20px var(--mono);margin:0;tab-size:4}
.editor textarea{border:0;outline:0;resize:none;padding:14px;background:var(--bg);color:var(--fg);white-space:pre;overflow:auto;width:100%;height:100%}
.status{display:flex;justify-content:space-between;gap:12px;margin-top:10px;color:var(--mut);font-size:12.5px;flex-wrap:wrap}
.status .dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--fg);margin-right:7px}
.status .dot.dirty{background:transparent;border:1.5px solid var(--fg)}

/* modal */
.overlay{position:fixed;inset:0;z-index:50;background:rgba(0,0,0,.45);display:grid;place-items:center;padding:20px;animation:fade .12s ease-out}
.modal{width:100%;max-width:440px;max-height:88vh;overflow:auto;background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:var(--sh);animation:pop .14s ease-out}
.modal.wide{max-width:560px}
.modal .actions{display:flex;justify-content:flex-end;gap:8px;margin-top:22px;flex-wrap:wrap}
.opt{display:flex;gap:12px;align-items:flex-start;padding:12px;border:1px solid var(--line);border-radius:10px;cursor:pointer;margin-top:8px}
.opt:has(input:checked){border-color:var(--fg)}
.opt input{margin-top:4px;accent-color:var(--fg)}
.opt b{display:block;font-weight:500}
.opt span{color:var(--mut);font-size:12.5px}
.hist{margin-top:12px;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.hist .h{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 12px;border-top:1px solid var(--line)}
.hist .h:first-child{border-top:0}
.hist .h small{display:block;color:var(--mut)}
.hist .h div{min-width:0}
.hist .h b{font-weight:500;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes pop{from{opacity:0;transform:translateY(6px) scale(.99)}to{opacity:1;transform:none}}

/* toast */
#toasts{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);display:flex;flex-direction:column;gap:8px;z-index:90;align-items:center}
.toast{display:flex;align-items:center;gap:9px;padding:10px 16px;border-radius:10px;background:var(--fg);color:var(--inv);font-size:13.5px;box-shadow:var(--sh);animation:pop .16s ease-out}
.toast.err{outline:2px solid var(--danger)}

/* user chip + divider */
.chip{display:flex;align-items:center;gap:8px;height:34px;padding:0 10px 0 4px;margin-right:4px;border:1px solid var(--line);border-radius:999px;font-size:13px;font-weight:500;max-width:200px}
.chip span:last-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.avatar{width:24px;height:24px;border-radius:50%;object-fit:cover;flex:none}
.avatar.ph{display:grid;place-items:center;background:var(--fg);color:var(--inv);font-size:12px;font-weight:600}
.divider{display:flex;align-items:center;gap:12px;margin:18px 0;color:var(--mut);font-size:12.5px}
.divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--line)}
a.btn{text-decoration:none}

/* login */
.center{min-height:100vh;display:grid;place-items:center;padding:20px}
.login{width:100%;max-width:340px}
.login .logo{width:44px;height:44px;border-radius:12px;background:var(--fg);color:var(--inv);display:grid;place-items:center;margin-bottom:20px}
.login .logo .i{width:22px;height:22px}
.login h1{margin-bottom:4px}
.login .input{margin-top:20px}
.code{display:block;margin-top:10px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--sub);font:12.5px var(--mono);word-break:break-all}

@media (max-width:720px){
  .row{grid-template-columns:1fr auto}
  .row .ms,.row .tm{display:none}
  .row .ac{opacity:1}
  .row.proj{grid-template-columns:1fr auto}
  .row.proj .badge{display:none}
  .chip span:last-child{display:none}
  .chip{padding:0 4px}
  .editor{height:calc(100vh - 380px)}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}