:root{
  --bg:#f6f7f9;--panel:#fff;--ink:#17202e;--muted:#5d6878;--line:#e2e6ec;--soft:#eef1f5;
  --brand:#1f5eff;--brand-ink:#fff;--ok:#0f8a4b;--ok-bg:#e6f6ee;--warn:#a15c00;--warn-bg:#fff4e0;
  --bad:#c2253b;--bad-bg:#fdeaec;--code:#0f1724;--code-ink:#dbe4f3;--radius:10px;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0e131b;--panel:#151c27;--ink:#e6ebf2;--muted:#94a0b2;--line:#263142;--soft:#1b2432;
  --brand:#5b8cff;--ok:#3ccf87;--ok-bg:#12301f;--warn:#f0b357;--warn-bg:#33270f;--bad:#ff6b7f;--bad-bg:#3a1820;
  --code:#0a0f16;--code-ink:#cfd9e8;}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:14.5px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
h1{font-size:22px;margin:0 0 4px}h2{font-size:16px;margin:0 0 12px}h3{font-size:14px;margin:16px 0 8px}
p{margin:0 0 10px}.muted{color:var(--muted)}.small{font-size:12.5px}
code,pre,.mono{font-family:var(--mono);font-size:12.5px}
pre{background:var(--code);color:var(--code-ink);padding:14px;border-radius:8px;overflow:auto;margin:0 0 12px;white-space:pre-wrap;word-break:break-all}
code{background:var(--soft);padding:1px 5px;border-radius:4px}
pre code{background:none;padding:0}
.top{background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.top .in{max-width:1180px;margin:0 auto;display:flex;align-items:center;gap:20px;padding:0 16px;height:56px;overflow-x:auto}
.logo{font-weight:700;color:var(--ink);white-space:nowrap;display:flex;align-items:center;gap:8px}
.logo i{display:inline-block;width:22px;height:22px;border-radius:6px;background:var(--brand);position:relative}
.logo i:after{content:"";position:absolute;inset:6px 4px;border:2px solid #fff;border-top-width:0;border-radius:0 0 3px 3px}
.nav{display:flex;gap:4px}.nav a{color:var(--muted);padding:6px 10px;border-radius:7px;white-space:nowrap}
.nav a.on,.nav a:hover{background:var(--soft);color:var(--ink);text-decoration:none}
.top .sp{flex:1}
.wrap{max-width:1180px;margin:0 auto;padding:24px 16px 60px}
.head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:18px;flex-wrap:wrap}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:16px}
.grid{display:grid;gap:16px}.g2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-bottom:16px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.stat b{display:block;font-size:22px;font-variant-numeric:tabular-nums}.stat span{color:var(--muted);font-size:12.5px}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);font-weight:600}
tr:last-child td{border-bottom:0}
.tbl{overflow-x:auto}
td.wrap-any{word-break:break-all}
.pill{display:inline-block;padding:1px 8px;border-radius:99px;font-size:12px;font-weight:600;background:var(--soft);color:var(--muted);white-space:nowrap}
.pill.ok,.pill.active,.pill.delivered{background:var(--ok-bg);color:var(--ok)}
.pill.warn,.pill.sandbox,.pill.deferred,.pill.queued,.pill.sending,.pill.unverified{background:var(--warn-bg);color:var(--warn)}
.pill.bad,.pill.failed,.pill.suspended,.pill.suppressed{background:var(--bad-bg);color:var(--bad)}
.flash{padding:11px 14px;border-radius:8px;margin-bottom:16px;background:var(--ok-bg);color:var(--ok);border:1px solid transparent}
.flash.err{background:var(--bad-bg);color:var(--bad)}
.notice{padding:12px 14px;border-radius:8px;background:var(--warn-bg);color:var(--warn);margin-bottom:16px}
form.inline{display:inline}
label{display:block;font-weight:600;font-size:13px;margin:0 0 4px}
input[type=text],input[type=email],input[type=password],input[type=url],input[type=number],select,textarea{
  width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--ink);font:inherit}
textarea{font-family:var(--mono);font-size:12.5px;min-height:140px}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:-1px}
.field{margin-bottom:12px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}.row>*{flex:1;min-width:160px}.row>.btn,.row>button{flex:0 0 auto}
.btn,button{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:8px;border:1px solid var(--brand);background:var(--brand);color:var(--brand-ink);font:inherit;font-weight:600;cursor:pointer;white-space:nowrap}
.btn:hover,button:hover{text-decoration:none;filter:brightness(1.06)}
.btn.ghost,button.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.danger,button.danger{background:transparent;color:var(--bad);border-color:var(--bad)}
.btn.sm,button.sm{padding:4px 10px;font-size:12.5px}
.checks{display:flex;flex-wrap:wrap;gap:6px 16px;margin:6px 0 12px}.checks label{font-weight:400;display:flex;gap:6px;align-items:center;margin:0}
.secret{display:flex;gap:8px;align-items:center;background:var(--soft);border:1px dashed var(--line);padding:10px;border-radius:8px;margin:8px 0;word-break:break-all}
.secret code{background:none;flex:1}
.bars{display:flex;gap:6px;align-items:flex-end;height:120px;padding-top:8px}
.bars div{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:4px;min-width:0}
.bars i{display:block;width:100%;background:var(--brand);border-radius:4px 4px 0 0;min-height:2px;opacity:.85}
.bars span{font-size:10.5px;color:var(--muted);white-space:nowrap}
.auth{max-width:400px;margin:60px auto}
.hero{text-align:center;padding:60px 16px 30px}.hero h1{font-size:36px;line-height:1.15;margin-bottom:12px}
.hero p{font-size:17px;color:var(--muted);max-width:640px;margin:0 auto 24px}
.feat{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.kv{display:grid;grid-template-columns:160px 1fr;gap:6px 14px}.kv dt{color:var(--muted)}.kv dd{margin:0;word-break:break-all}
.toc a{display:block;padding:3px 0}
.docs{display:grid;grid-template-columns:220px 1fr;gap:24px}
.docs .toc{position:sticky;top:76px;align-self:start}
@media (max-width:800px){.docs{grid-template-columns:1fr}.docs .toc{position:static}.kv{grid-template-columns:1fr}.hero h1{font-size:28px}}
.bars div:nth-child(even) span{visibility:hidden}
.subnav{display:flex;gap:4px;border-bottom:1px solid var(--line);margin:-6px 0 18px;overflow-x:auto}
.subnav a{padding:8px 12px;color:var(--muted);border-bottom:2px solid transparent;white-space:nowrap}
.subnav a.on{color:var(--ink);border-bottom-color:var(--brand);text-decoration:none}
.legend{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:12.5px;margin-top:8px}.legend i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:5px;vertical-align:-1px}
.score{font-size:40px;font-weight:700;line-height:1}.score.ok{color:var(--ok)}.score.warn{color:var(--warn)}.score.bad{color:var(--bad)}

/* ---------- client panel shell: sidebar layout ---------- */
.navtoggle{position:absolute;opacity:0;pointer-events:none}
body.has-side{display:block}
.side{position:fixed;inset:0 auto 0 0;width:240px;background:var(--panel);border-right:1px solid var(--line);overflow-y:auto;padding:14px 10px 24px;z-index:30;transition:transform .2s}
.side .logo{padding:6px 10px 14px;font-size:16px}
.snav a{display:flex;align-items:center;gap:10px;padding:7px 10px;border-radius:8px;color:var(--muted);font-size:14px;line-height:1.3}
.snav a b{width:18px;text-align:center;font-weight:400;opacity:.8}
.snav a:hover{background:var(--soft);color:var(--ink);text-decoration:none}
.snav a.on{background:var(--soft);color:var(--ink);font-weight:600}
.snav a.on b{color:var(--brand);opacity:1}
.sgrp{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);padding:14px 10px 4px;font-weight:600}
.main{margin-left:240px;min-height:100vh}
.tbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:10px;height:56px;padding:0 20px;background:var(--panel);border-bottom:1px solid var(--line)}
.tbar .sp{flex:1}.tb-title{font-weight:600}
.tbar .acct{max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pill.plan{background:var(--soft);color:var(--ink);text-decoration:none}
.burger{display:none;font-size:20px;cursor:pointer;padding:4px 8px;border-radius:6px}
.scrim{display:none}
.main .wrap{max-width:1180px;padding:24px 20px 60px}
@media (max-width:900px){
  .side{transform:translateX(-100%)}
  .navtoggle:checked ~ .side{transform:none;box-shadow:0 0 40px rgba(0,0,0,.25)}
  .navtoggle:checked ~ .scrim{display:block;position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:25}
  .main{margin-left:0}.burger{display:inline-block}
  .tbar .acct,.tbar .pill.plan{display:none}
  .main .wrap{padding:18px 16px 50px}
}
/* onboarding + usage */
.steps{display:grid;gap:10px;margin:0;padding:0;list-style:none}
.steps li{display:flex;gap:12px;align-items:flex-start;padding:12px;border:1px solid var(--line);border-radius:10px}
.steps li .dot{flex:0 0 26px;height:26px;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:700;background:var(--soft);color:var(--muted)}
.steps li.done .dot{background:var(--ok-bg);color:var(--ok)}
.steps li.done .t{color:var(--muted);text-decoration:line-through}
.steps li .t{font-weight:600}.steps li p{margin:2px 0 0;font-size:13px;color:var(--muted)}
.steps li .act{margin-left:auto;flex:0 0 auto}
.meter{height:10px;border-radius:99px;background:var(--soft);overflow:hidden;margin:10px 0 6px}
.meter i{display:block;height:100%;background:var(--brand);border-radius:99px}
.meter i.warn{background:var(--warn)}.meter i.bad{background:var(--bad)}
.hello h1{font-size:24px}
.snip{position:relative}.snip button{position:absolute;top:8px;right:8px}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:14px}
.tabs label{padding:8px 12px;cursor:pointer;color:var(--muted);border-bottom:2px solid transparent;margin:0;font-weight:500}
.tabsel{position:absolute;opacity:0;pointer-events:none}
.tabpanes>div{display:none}
#t1:checked~.tabs label[for=t1],#t2:checked~.tabs label[for=t2],#t3:checked~.tabs label[for=t3],#t4:checked~.tabs label[for=t4]{color:var(--ink);border-bottom-color:var(--brand)}
#t1:checked~.tabpanes>div:nth-child(1),#t2:checked~.tabpanes>div:nth-child(2),#t3:checked~.tabpanes>div:nth-child(3),#t4:checked~.tabpanes>div:nth-child(4){display:block}
@media (max-width:600px){.steps li{flex-wrap:wrap}.steps li .act{margin-left:38px}.head .btn{width:100%;justify-content:center}}