:root{
  --ink:#14171a; --ink-2:#3d4650; --ink-3:#6b7683;
  --line:#e2e6ea; --line-2:#eef1f4;
  --bg:#f6f7f8; --panel:#ffffff;
  --brand:#1B4D3E; --brand-2:#2a6f5a; --brand-tint:#eef4f1;
  --warn:#8a5a00; --warn-bg:#fff8e6; --warn-line:#f0dcae;
  --bad:#8a1f1f; --bad-bg:#fdf0f0; --bad-line:#f0caca;
  --ok:#14603f; --ok-bg:#eaf6f0; --ok-line:#bfe0ce;
  --r:10px; --shadow:0 1px 2px rgba(16,24,32,.06),0 4px 14px rgba(16,24,32,.05);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased}
a{color:var(--brand-2)}
h1,h2,h3{margin:0;line-height:1.25;letter-spacing:-.01em}
h1{font-size:22px}h2{font-size:17px}h3{font-size:14px}
.mono{font-family:var(--mono)}

/* shell */
.top{background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.top-in{max-width:1240px;margin:0 auto;padding:0 22px;height:58px;display:flex;align-items:center;gap:22px}
.brandmark{font-weight:700;letter-spacing:-.02em;display:flex;align-items:center;gap:9px;color:var(--ink);text-decoration:none}
.dot{width:9px;height:9px;border-radius:50%;background:var(--brand)}
.nav{display:flex;gap:4px;margin-left:8px}
.nav a{padding:7px 12px;border-radius:7px;color:var(--ink-2);text-decoration:none;font-size:14px;font-weight:500}
.nav a:hover{background:var(--line-2);color:var(--ink)}
.nav a.on{background:var(--brand-tint);color:var(--brand)}
.spacer{flex:1}
.who{font-size:13px;color:var(--ink-3);overflow:hidden;text-overflow:ellipsis;
  white-space:nowrap;max-width:38vw}
/* On a phone the address plus Sign out overflow the bar and the whole page
   scrolls sideways. The address is not needed to operate the app; the Sign out
   button is. Drop the address and tighten the nav instead of letting the page
   scroll. */
@media(max-width:560px){
  .who{display:none}
  .nav{margin-left:0;gap:0}
  .nav a{padding:7px 9px;font-size:13.5px}
  .brandmark{font-size:15px}
}
.wrap{max-width:1240px;margin:0 auto;padding:26px 22px 70px}

/* panels */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.panel-h{padding:15px 18px;border-bottom:1px solid var(--line-2);display:flex;align-items:center;gap:12px}
.panel-b{padding:18px}
.sub{color:var(--ink-3);font-size:13px;margin-top:3px}
.grid{display:grid;gap:18px}
/* Grid and flex items default to min-width:auto, so a wide child (the email
   source <pre>, ~26000px at its natural width) expands the COLUMN instead of
   scrolling inside it. That pushed the centred preview iframe thousands of
   pixels off-screen and left an empty grey panel. Let items shrink. */
.grid>*{min-width:0}
.g-2{grid-template-columns:1.55fr 1fr}
@media(max-width:960px){.g-2{grid-template-columns:1fr}}

/* forms */
label{display:block;font-size:12px;font-weight:600;color:var(--ink-2);
  text-transform:uppercase;letter-spacing:.05em;margin:0 0 6px}
input[type=text],input[type=email],input[type=password],input[type=url],textarea,select{
  width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;
  font:inherit;color:var(--ink);background:#fff}
input:focus,textarea:focus,select:focus{outline:0;border-color:var(--brand-2);
  box-shadow:0 0 0 3px rgba(42,111,90,.13)}
textarea{resize:vertical;min-height:132px;line-height:1.6}
input[type=color]{width:44px;height:38px;padding:2px;border:1px solid var(--line);border-radius:8px;background:#fff}
.field{margin-bottom:14px}
.row{display:flex;gap:12px}.row>*{flex:1}
.hint{font-size:12px;color:var(--ink-3);margin-top:5px}

.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:8px;
  border:1px solid var(--brand);background:var(--brand);color:#fff;font:inherit;
  font-weight:600;font-size:14px;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--brand-2);border-color:var(--brand-2)}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.btn.ghost{background:#fff;color:var(--ink-2);border-color:var(--line)}
.btn.ghost:hover{background:var(--line-2);color:var(--ink)}
.btn.danger{background:#fff;color:var(--bad);border-color:var(--bad-line)}
.btn.sm{padding:7px 11px;font-size:13px}

/* status */
.tag{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;border-radius:999px;
  font-size:11.5px;font-weight:700;letter-spacing:.03em;text-transform:uppercase;border:1px solid}
.t-ok{background:var(--ok-bg);color:var(--ok);border-color:var(--ok-line)}
.t-bad{background:var(--bad-bg);color:var(--bad);border-color:var(--bad-line)}
.t-warn{background:var(--warn-bg);color:var(--warn);border-color:var(--warn-line)}
.t-mute{background:var(--line-2);color:var(--ink-3);border-color:var(--line)}

.note{padding:12px 14px;border-radius:8px;font-size:13.5px;line-height:1.5;border:1px solid}
.n-warn{background:var(--warn-bg);color:var(--warn);border-color:var(--warn-line)}
.n-bad{background:var(--bad-bg);color:var(--bad);border-color:var(--bad-line)}
.n-ok{background:var(--ok-bg);color:var(--ok);border-color:var(--ok-line)}
.n-info{background:var(--brand-tint);color:var(--brand);border-color:#cfe2d9}

/* lists */
.list{list-style:none;margin:0;padding:0}
.list li{padding:13px 0;border-bottom:1px solid var(--line-2)}
.list li:last-child{border-bottom:0}
.item{display:flex;align-items:flex-start;gap:12px;text-decoration:none;color:inherit}
.item:hover .it-sub{color:var(--brand-2)}
.it-code{font-family:var(--mono);font-size:11px;font-weight:700;color:var(--brand);
  background:var(--brand-tint);border-radius:5px;padding:3px 7px;flex-shrink:0;margin-top:1px}
.it-sub{font-weight:600;font-size:14.5px;color:var(--ink)}
.it-meta{font-size:12.5px;color:var(--ink-3);margin-top:2px}

.stat{display:flex;gap:26px;flex-wrap:wrap}
.stat div span{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-3);font-weight:600}
.stat div b{font-size:19px;font-weight:700;letter-spacing:-.01em}

/* login */
.login{min-height:100vh;display:grid;place-items:center;padding:24px}
.login .panel{width:100%;max-width:390px}
.login-h{padding:26px 26px 4px}
.login-h .brandmark{font-size:17px;margin-bottom:16px}

/* preview */
.preview{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:#f2f2f0;min-width:0}
.preview iframe{display:block;width:100%;border:0;height:760px;background:#f2f2f0}
.pv-bar{display:flex;align-items:center;gap:8px;padding:9px 12px;background:var(--panel);border-bottom:1px solid var(--line);min-width:0}
.pv-bar .w{margin-left:auto;display:flex;gap:6px}
.chip{padding:5px 10px;border:1px solid var(--line);background:#fff;border-radius:7px;
  font-size:12.5px;cursor:pointer;color:var(--ink-2);font-weight:500}
.chip.on{background:var(--brand);color:#fff;border-color:var(--brand)}
.inbox{border:1px solid var(--line);border-radius:8px;padding:13px 15px;background:#fff}
.inbox .from{font-weight:700;font-size:14px}
.inbox .subj{font-size:14px;margin-top:2px}
.inbox .pre{font-size:13px;color:var(--ink-3);margin-top:1px}
.cnt{font-family:var(--mono);font-size:11px;color:var(--ink-3)}

pre.src{background:#12171c;color:#d5dde5;padding:15px;border-radius:8px;overflow:auto;
  max-height:420px;font-family:var(--mono);font-size:12px;line-height:1.5;margin:0;
  max-width:100%;min-width:0}
.panel,.panel-b,.panel-h{min-width:0}
.spin{width:15px;height:15px;border:2px solid rgba(255,255,255,.35);border-top-color:#fff;
  border-radius:50%;animation:sp .7s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
.stage{font-size:13px;color:var(--ink-3);display:flex;align-items:center;gap:9px;margin-top:12px}
.stage .spin{border-color:rgba(27,77,62,.25);border-top-color:var(--brand)}