:root{
  --ink:#1b2130; --muted:#5f6778; --line:#dfe3ea; --paper:#f4f6f8; --panel:#fff;
  --brand:#0b6b63; --brand-ink:#fff; --brand-soft:#e3f1ef; --danger:#b42318; --danger-soft:#fdecea; --warn:#8a5a00;
  --r:10px; --font:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font:14px/1.5 var(--font);color:var(--ink);background:var(--paper)}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--brand)}
:focus-visible{outline:3px solid color-mix(in srgb,var(--brand) 55%,transparent);outline-offset:2px}

/* Auth */
.auth{min-height:100%;display:grid;place-items:center;padding:24px}
.auth form{width:100%;max-width:380px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:28px}
.auth h1{font-size:22px;margin:0 0 4px}.auth p{color:var(--muted);margin:0 0 20px}

/* Layout */
.shell{display:grid;grid-template-columns:240px 1fr;min-height:100%}
.rail{background:#12312e;color:#dfeeec;padding:18px 12px;display:flex;flex-direction:column;gap:4px;position:sticky;top:0;height:100vh;overflow:auto}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:15px;padding:4px 8px 16px;color:#fff}
.brand i{width:26px;height:26px;border-radius:50%;background:#2fb3a4;display:grid;place-items:center;font-style:normal;color:#0c2522}
.rail h2{font-size:12px;font-weight:600;color:#8fb3ae;margin:14px 8px 4px}
.rail button{all:unset;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 10px;border-radius:8px;cursor:pointer;color:#dfeeec}
.rail button:hover{background:rgba(255,255,255,.07)}
.rail button[aria-current="true"]{background:rgba(47,179,164,.22);color:#fff}
.rail .dot{width:8px;height:8px;border-radius:50%;background:#2fb3a4;flex:none}.rail .dot.off{background:#6b7f7c}
.rail .spacer{flex:1}
.rail .who{font-size:12px;color:#8fb3ae;padding:8px 10px}
.main{min-width:0;display:flex;flex-direction:column}

.top{background:var(--panel);border-bottom:1px solid var(--line);padding:16px 28px 0;position:sticky;top:0;z-index:5}
.top-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.top h1{font-size:20px;margin:0}
.top .meta{color:var(--muted);font-size:13px}
.top .actions{margin-left:auto;display:flex;gap:8px;align-items:center}
.tabs{display:flex;gap:2px;margin-top:12px;overflow-x:auto}
.tabs button{all:unset;cursor:pointer;padding:10px 12px;border-bottom:2px solid transparent;color:var(--muted);white-space:nowrap}
.tabs button:hover{color:var(--ink)}
.tabs button[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--brand);font-weight:600}

.content{padding:24px 28px 80px;flex:1}
.split{display:grid;grid-template-columns:minmax(0,600px) minmax(500px,1fr);gap:28px;align-items:start}
.preview{position:sticky;top:130px;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.preview-bar{display:flex;gap:8px;align-items:center;padding:10px 12px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.preview-bar input{flex:1;min-width:120px}
.preview-stage{background:#e8ebf0;display:flex;justify-content:center;height:calc(100vh - 230px);min-height:520px}
.preview-stage iframe{border:0;width:100%;height:100%;background:#eef0f4;transition:width .2s}
.preview-stage.mobile iframe{width:390px;border-left:1px solid var(--line);border-right:1px solid var(--line)}
.preview-note{font-size:12px;color:var(--muted);padding:8px 12px;border-top:1px solid var(--line)}

/* Cards & forms */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:20px;margin-bottom:18px}
.card>h2{font-size:16px;margin:0 0 2px}
.card>.sub{color:var(--muted);margin:0 0 16px;font-size:13px}
.field{margin-bottom:16px}
.field:last-child{margin-bottom:0}
.field>label,.field>.label{display:block;font-weight:600;margin-bottom:6px}
.help{color:var(--muted);font-size:12.5px;margin-top:4px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.row3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
input[type=text],input[type=email],input[type=password],input[type=url],input[type=number],input[type=search],input[type=time],select,textarea{
  width:100%;height:38px;padding:0 10px;border:1px solid var(--line);border-radius:8px;background:#fff}
textarea{height:auto;min-height:90px;padding:8px 10px;resize:vertical}
textarea.code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px}
input:disabled,select:disabled,textarea:disabled{background:var(--paper);color:var(--muted)}
.color{display:flex;gap:8px;align-items:center}
.color input[type=color]{width:44px;height:38px;padding:2px;border:1px solid var(--line);border-radius:8px;background:#fff}
.color input[type=text]{width:120px}
.check{display:flex;gap:10px;align-items:flex-start;cursor:pointer;margin-bottom:10px}
.check input{margin-top:3px;width:16px;height:16px;accent-color:var(--brand)}
.check span small{display:block;color:var(--muted);font-size:12.5px}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;flex-wrap:wrap}
.seg label{padding:7px 12px;cursor:pointer;border-right:1px solid var(--line);background:#fff}
.seg label:last-child{border-right:0}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg label:has(input:checked){background:var(--brand);color:var(--brand-ink)}
.seg label:has(input:focus-visible){outline:3px solid color-mix(in srgb,var(--brand) 55%,transparent)}
.inline{display:flex;gap:8px;align-items:center}
.indent{margin:-4px 0 12px 26px}
.invalid input,.invalid select,.invalid textarea{border-color:var(--danger)}
.err{color:var(--danger);font-size:12.5px;margin-top:4px}

/* List editors */
.list-item{display:flex;gap:8px;align-items:center;margin-bottom:8px}
.list-item>*{flex:1}
.list-item .icon-btn{flex:none}
.group{border:1px solid var(--line);border-radius:8px;padding:14px;margin-bottom:12px;background:#fbfcfd}
.group-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 14px;border-radius:8px;border:1px solid var(--line);background:#fff;cursor:pointer;font-weight:600;white-space:nowrap}
.btn:hover{background:var(--paper)}
.btn.primary{background:var(--brand);border-color:var(--brand);color:var(--brand-ink)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.danger{color:var(--danger);border-color:#f1c3be}
.btn.danger:hover{background:var(--danger-soft)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.small{height:30px;padding:0 10px;font-size:13px}
.icon-btn{all:unset;cursor:pointer;width:30px;height:30px;display:inline-grid;place-items:center;border-radius:6px;color:var(--muted)}
.icon-btn:hover{background:var(--paper);color:var(--ink)}
.icon-btn:disabled{opacity:.3;cursor:default}
.dirty{color:var(--warn);font-size:13px;font-weight:600}

/* Tables */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:#fff}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:12.5px;color:var(--muted);font-weight:600;background:#fbfcfd}
tr:last-child td{border-bottom:0}
td .url{display:block;color:var(--muted);font-size:12.5px;max-width:360px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badge{display:inline-block;white-space:nowrap;padding:1px 8px;border-radius:10px;font-size:12px;background:var(--paper);color:var(--muted);border:1px solid var(--line)}
.badge.on{background:var(--brand-soft);color:var(--brand);border-color:#bfe0db}
.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:14px;flex-wrap:wrap}
.toolbar input[type=search]{max-width:280px}
.toolbar select{width:auto}
.toolbar .grow{flex:1}

/* Analytics */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:18px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px 16px}
.stat b{display:block;font-size:24px;font-variant-numeric:tabular-nums}
.stat span{color:var(--muted);font-size:13px}
.chart svg{width:100%;height:180px;display:block}
.legend{display:flex;gap:16px;font-size:12.5px;color:var(--muted);margin-top:6px}
.legend i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:6px;vertical-align:-1px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:18px}

/* Snippet */
pre.snippet{background:#10201e;color:#d7ece8;padding:16px;border-radius:8px;overflow-x:auto;font-size:12.5px;line-height:1.6;margin:0 0 10px;white-space:pre}
.keybox{display:flex;gap:8px;align-items:center}
.keybox code{background:var(--paper);border:1px solid var(--line);padding:6px 10px;border-radius:6px;font-size:13px}

/* Dialog */
dialog{border:0;border-radius:14px;padding:0;width:min(640px,calc(100vw - 32px));box-shadow:0 30px 80px rgba(0,0,0,.3)}
dialog::backdrop{background:rgba(16,24,40,.45)}
dialog form{padding:22px}
dialog h2{margin:0 0 16px;font-size:18px}
.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:20px}

/* Toast */
#toasts{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;gap:8px;z-index:100}
.toast{background:#1b2130;color:#fff;padding:10px 16px;border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.2)}
.toast.error{background:var(--danger)}
.empty-state{text-align:center;padding:40px 20px;color:var(--muted)}
.muted{color:var(--muted)}

@media (max-width:1240px){.split{grid-template-columns:1fr}.preview{position:static}.preview-stage{height:600px}}
@media (max-width:820px){.shell{grid-template-columns:1fr}.rail{position:static;height:auto}.row,.row3,.two{grid-template-columns:1fr}.content,.top{padding-left:16px;padding-right:16px}}

/* v3: channels, scope chooser, system */
.keytext{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;color:var(--muted);background:var(--paper);border:1px solid var(--line);border-radius:5px;padding:1px 6px;margin-left:8px}
td .keytext{display:inline-block;margin:2px 0 0;margin-left:0;display:block;width:max-content}
tr.clickable{cursor:pointer}
tr.clickable:hover td,tr.clickable:focus-visible td{background:#f8faf9}
.choices{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.choice{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--line);border-radius:10px;padding:12px 14px;cursor:pointer;background:#fff}
.choice input{margin-top:3px;accent-color:var(--brand)}
.choice strong{display:block}
.choice small{display:block;color:var(--muted);font-size:12.5px;margin-top:2px}
.choice.on{border-color:var(--brand);box-shadow:0 0 0 1px var(--brand);background:#f7fbfa}
pre.examples{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:10px 12px;font-size:12px;line-height:1.7;margin:6px 0 0;overflow-x:auto;color:var(--ink)}
dialog.wide{width:min(720px,calc(100vw - 32px))}
.review{display:grid;grid-template-columns:160px 1fr;gap:8px 16px;margin:0}
.review dt{color:var(--muted)}.review dd{margin:0;word-break:break-all}
@media (max-width:820px){.choices{grid-template-columns:1fr}}

a.btn{text-decoration:none}