/* Envelope — the family ink-and-copper. The signature here is the severity scale: this tool's
   whole job is to sort what is broken from what is merely untidy, so colour has to carry meaning
   rather than decorate. */

:root {
  --ink: #151C2C;
  --graphite: #1C2436;
  --panel: #10151F;
  --hair: rgba(255, 255, 255, .09);
  --glass: rgba(255, 255, 255, .04);
  --glass-b: rgba(255, 255, 255, .1);
  --text: #E8ECF0;
  --muted: #98A2AD;
  --dim: #6C7686;
  --copper: #D9884A;
  --copper-t: #F0A868;
  --green: #5FB98F;
  --red: #E4695B;
  --amber: #E0A64B;
  --violet: #9E8CD8;
  --sans: Geist, system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --r: 13px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--ink); color: var(--text);
  font: 400 16px/1.55 var(--sans); -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(58% 36% at 84% 0%, rgba(217, 136, 74, .13), transparent 70%);
  background-repeat: no-repeat;
  overflow-x: hidden;
}
.mono { font-family: var(--mono); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.wrap { width: 100%; max-width: 1320px; margin-inline: auto; padding-inline: 24px; }
h1, h2, h3 { margin: 0; letter-spacing: -.025em; text-wrap: balance; }
p { margin: 0 0 14px; }
a { color: var(--copper-t); }
code, .mono { font-family: var(--mono); }

.eyebrow { font: 500 11.5px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.quiet { color: var(--muted); }
.small { font-size: 13.5px; }
.note { color: var(--dim); font-size: 12.5px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px; border-radius: 999px; cursor: pointer;
  padding: 10px 18px; font: 500 13.5px/1 var(--sans); border: 1px solid var(--glass-b);
  background: var(--glass); color: var(--text); text-decoration: none; white-space: nowrap;
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}
.btn:hover { border-color: rgba(255, 255, 255, .22); background: rgba(255, 255, 255, .08); }
.btn.primary { background: linear-gradient(140deg, #F0A868, #D9884A); border-color: transparent; color: #17120C; font-weight: 600; }
.btn.primary:hover { transform: translateY(-1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.linkish { background: none; border: 0; padding: 0; cursor: pointer; color: var(--copper-t); font: inherit; text-decoration: underline; text-underline-offset: 2px; }

/* header */
.top { position: sticky; top: 0; z-index: 30; backdrop-filter: blur(14px); background: rgba(21, 28, 44, .82); border-bottom: 1px solid var(--hair); }
.top-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 60px; min-width: 0; }
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: inherit; }
.mark svg { width: 30px; height: 30px; display: block; }
.mark rect { fill: var(--copper); }
.mark .body, .mark .flap { fill: none; stroke: #151C2C; stroke-width: 2.6; stroke-linejoin: round; stroke-linecap: round; }
.brand-t { display: flex; flex-direction: column; line-height: 1.15; }
.brand-t b { font-size: 15px; font-weight: 600; }
.brand-t i { font-style: normal; font: 400 10.5px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.top-right { display: flex; align-items: center; justify-content: flex-end; gap: 12px; min-width: 0; flex: 1 1 auto; }
.health { font-size: 11.5px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; flex: 0 1 auto; }

/* hero */
.hero { padding: 62px 24px 26px; }
.hero h1 { margin-top: 13px; font: 600 clamp(31px, 4.8vw, 56px)/1.05 var(--sans); letter-spacing: -.038em; max-width: 21ch; }
.hero h1 em { font-style: normal; color: var(--copper-t); }
.lede { margin-top: 17px; font-size: 17px; line-height: 1.55; color: var(--muted); max-width: 70ch; }
.lede b { color: var(--text); font-weight: 500; }

/* the tool */
.tool { padding: 8px 24px 26px; }
.in-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.in-tab {
  padding: 9px 15px; border-radius: 999px; cursor: pointer; white-space: nowrap;
  border: 1px solid var(--glass-b); background: var(--glass); color: var(--muted);
  font: 500 13px/1 var(--sans);
}
.in-tab.on { background: var(--text); border-color: var(--text); color: var(--ink); }
.in-pane { display: none; }
.in-pane.on { display: block; }

.dform { display: flex; gap: 10px; align-items: stretch; flex-wrap: wrap; }
.dinput {
  flex: 1 1 260px; min-width: 0; padding: 14px 18px; border-radius: var(--r);
  border: 1px solid var(--glass-b); background: rgba(0, 0, 0, .24); color: var(--text);
  font: 400 16px/1 var(--mono); letter-spacing: -.01em;
}
.dinput:focus { outline: none; border-color: var(--copper); box-shadow: 0 0 0 3px rgba(217, 136, 74, .16); }
.dform .btn { padding-inline: 26px; }

textarea {
  width: 100%; padding: 15px 17px; border-radius: var(--r); resize: vertical;
  border: 1px solid var(--glass-b); background: rgba(0, 0, 0, .24); color: var(--text);
  font: 400 13px/1.6 var(--mono);
}
textarea:focus { outline: none; border-color: var(--copper); }
.privacy { margin-top: 11px; font-size: 13px; color: var(--muted); max-width: 92ch; }
.privacy b { color: var(--text); }
.go-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 12px; }

/* output shell */
.out { padding: 16px 24px 30px; }
.out-head { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end; justify-content: space-between; padding-bottom: 14px; border-bottom: 1px solid var(--hair); }
.out-head h2 { font: 600 clamp(23px, 2.6vw, 32px)/1.1 var(--sans); }
.summary { margin: 6px 0 0; color: var(--muted); font-size: 15px; max-width: 74ch; }
.summary b { color: var(--text); font-weight: 500; }
.summary .bad { color: var(--red); font-weight: 600; }
.summary .mid { color: var(--amber); font-weight: 600; }
.summary .good { color: var(--green); font-weight: 600; }
.out-actions { display: flex; flex-wrap: wrap; gap: 8px; }

/* cards */
.card { border: 1px solid var(--hair); border-radius: 16px; background: linear-gradient(180deg, rgba(255, 255, 255, .035), rgba(255, 255, 255, .012)); padding: 20px 22px; }
.card-h { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.card h3 { font: 600 16px/1.25 var(--sans); }
.card-p { margin: 14px 0 0; font-size: 13.5px; line-height: 1.6; color: var(--muted); }
.card-p em { font-style: normal; color: var(--text); }
.pill { font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); border: 1px solid var(--glass-b); border-radius: 999px; padding: 4px 9px; white-space: nowrap; }
.pill.ok { color: var(--green); border-color: rgba(95, 185, 143, .4); }
.pill.mid { color: var(--amber); border-color: rgba(224, 166, 75, .4); }
.pill.bad { color: var(--red); border-color: rgba(228, 105, 91, .45); }
.warn-pill { color: var(--copper-t); border-color: rgba(217, 136, 74, .4); }

.dgrid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 20px; }
.dgrid .wide { grid-column: 1 / -1; }

/* the SPF lookup gauge — ten slots, spent in front of you */
.gauge { display: grid; grid-template-columns: repeat(10, 1fr); gap: 5px; margin: 4px 0 10px; }
.slot { height: 44px; border-radius: 6px; background: rgba(255, 255, 255, .05); border: 1px solid var(--hair); position: relative; overflow: hidden; }
.slot::after { content: ""; position: absolute; inset: 0; transform: scaleY(0); transform-origin: bottom; background: linear-gradient(180deg, var(--copper-t), var(--copper)); transition: transform .5s var(--ease); transition-delay: calc(var(--i, 0) * 55ms); }
.slot.used::after { transform: scaleY(1); }
.slot.over { border-color: rgba(228, 105, 91, .5); }
.slot.over::after { background: linear-gradient(180deg, #F08A7D, var(--red)); }
.gauge.spill { grid-template-columns: repeat(auto-fit, minmax(26px, 1fr)); }
.gauge-l { font-size: 12.5px; color: var(--muted); margin: 0; }
.gauge-l b { color: var(--text); }
.gauge-l .over { color: var(--red); }

/* policy readout */
.policy { display: grid; gap: 9px; }
.prow { display: grid; grid-template-columns: 74px minmax(0, 1fr); gap: 12px; align-items: baseline; padding-bottom: 9px; border-bottom: 1px solid var(--hair); }
.prow:last-child { border-bottom: 0; padding-bottom: 0; }
.pk { font: 500 11px/1.5 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); }
.pv { font: 400 13px/1.5 var(--mono); word-break: break-word; min-width: 0; }
.pv .tag { color: var(--copper-t); }
.pv .off { color: var(--dim); }
.pv b { color: var(--text); }
.pv .g { color: var(--green); } .pv .a { color: var(--amber); } .pv .r { color: var(--red); }

/* senders */
.senders { display: flex; flex-wrap: wrap; gap: 7px; }
.sender { font: 500 12.5px/1 var(--sans); padding: 8px 12px; border-radius: 999px; border: 1px solid var(--glass-b); background: var(--glass); }
.senders .none { color: var(--dim); font-size: 13px; }

/* the resolved SPF chain */
.chain { display: grid; gap: 2px; font-size: 12.5px; overflow-x: auto; }
.crow { display: grid; grid-template-columns: minmax(150px, auto) minmax(0, 1fr); gap: 14px; padding: 7px 10px; border-radius: 8px; align-items: baseline; }
.crow:nth-child(odd) { background: rgba(255, 255, 255, .022); }
.cdom { color: var(--text); white-space: nowrap; }
.cdom .d { color: var(--dim); }
.crec { color: var(--muted); min-width: 0; word-break: break-word; }
.crec .t { padding: 1px 4px; border-radius: 4px; }
.crec .cost { color: var(--copper-t); background: rgba(217, 136, 74, .1); }
.crec .free { color: var(--dim); }
.crec .all { color: var(--text); background: rgba(255, 255, 255, .06); }
.crec .miss { color: var(--red); }

/* dkim keys */
.keys { display: grid; grid-template-columns: repeat(auto-fill, minmax(184px, 1fr)); gap: 8px; }
.key { border: 1px solid var(--hair); border-radius: 10px; padding: 11px 13px; background: rgba(255, 255, 255, .022); }
.key .sel { font: 500 13px/1.3 var(--mono); color: var(--text); word-break: break-all; }
.key .meta { font: 400 11.5px/1.5 var(--mono); color: var(--muted); margin-top: 3px; }
.key.weak { border-color: rgba(224, 166, 75, .38); }
.key.weak .meta { color: var(--amber); }
.key.rev { opacity: .55; }
.key.rev .meta { color: var(--dim); }
.keys .none { color: var(--dim); font-size: 13px; grid-column: 1 / -1; }
.keys .probing { color: var(--dim); font: 400 12.5px/1 var(--mono); grid-column: 1 / -1; }

/* findings */
.findings { display: grid; gap: 9px; margin-top: 20px; }
.f {
  display: grid; grid-template-columns: 82px minmax(0, 1fr); gap: 16px;
  border: 1px solid var(--hair); border-left-width: 3px; border-radius: 12px;
  padding: 15px 18px; background: rgba(255, 255, 255, .022);
}
.f.fail { border-left-color: var(--red); }
.f.warn { border-left-color: var(--amber); }
.f.note { border-left-color: var(--violet); }
.f.pass { border-left-color: var(--green); opacity: .78; }
.f-sev { font: 500 10.5px/1.6 var(--mono); letter-spacing: .13em; text-transform: uppercase; padding-top: 3px; }
.f.fail .f-sev { color: var(--red); }
.f.warn .f-sev { color: var(--amber); }
.f.note .f-sev { color: var(--violet); }
.f.pass .f-sev { color: var(--green); }
.f-t { font: 600 14.5px/1.35 var(--sans); }
.f-d { margin: 6px 0 0; font-size: 13.5px; line-height: 1.6; color: var(--muted); }
.f-d em { font-style: normal; color: var(--text); }
.f-fix { margin: 9px 0 0; font: 400 12.5px/1.6 var(--mono); color: var(--copper-t); padding-left: 13px; border-left: 2px solid rgba(217, 136, 74, .3); }

/* message stats */
.mstats { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.st { border: 1px solid var(--hair); border-radius: 9px; padding: 8px 12px; font-size: 12px; color: var(--muted); background: rgba(255, 255, 255, .022); }
.st b { color: var(--text); font-weight: 500; }

/* the five renders */
.views { margin-top: 20px; }
.view-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.view-tab { padding: 8px 13px; border-radius: 999px; cursor: pointer; border: 1px solid var(--glass-b); background: var(--glass); color: var(--muted); font: 500 12.5px/1 var(--sans); white-space: nowrap; }
.view-tab.on { background: var(--text); border-color: var(--text); color: var(--ink); }
.view-tab.all { margin-left: auto; }
.stage { display: grid; gap: 12px; }
.stage.all { grid-template-columns: repeat(auto-fit, minmax(232px, 1fr)); }
.screen { border: 1px solid var(--hair); border-radius: 14px; overflow: hidden; background: var(--panel); display: flex; flex-direction: column; min-width: 0; }
.screen-h { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 9px 13px; border-bottom: 1px solid var(--hair); background: rgba(255, 255, 255, .025); }
.screen-h b { font: 500 12px/1 var(--sans); }
.screen-h span { font: 400 10.5px/1 var(--mono); color: var(--dim); letter-spacing: .05em; }
.screen .fit { overflow: hidden; }
.screen iframe { width: 100%; border: 0; background: #fff; display: block; }
.stage.all iframe { height: 380px; }
.stage.one iframe { height: 620px; }
.screen.phone iframe { background: #fff; }
.screen pre { margin: 0; padding: 16px 18px; overflow: auto; font: 400 12.5px/1.65 var(--mono); color: var(--muted); white-space: pre-wrap; word-break: break-word; }
.stage.all pre { height: 380px; }
.stage.one pre { height: 620px; }
.stage-note { margin: 10px 0 0; font-size: 12px; color: var(--dim); display: grid; gap: 4px; }
.stage-note .sn { display: block; }

/* subject lines */
.subj { margin-top: 20px; }
.subj-list { margin: 12px 0 0; padding-left: 20px; display: grid; gap: 8px; }
.subj-list li { font: 500 15px/1.4 var(--sans); }
.subj-list li span { display: block; font: 400 11.5px/1 var(--mono); color: var(--dim); margin-top: 4px; }

/* bands */
.band { padding: 34px 24px; border-top: 1px solid var(--hair); margin-top: 34px; }
.sec-head { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 18px; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(248px, 1fr)); gap: 14px; }
.cols .card p { font-size: 13.5px; line-height: 1.62; color: var(--muted); margin: 10px 0 0; }
.tag { font-size: 11px !important; letter-spacing: .09em; text-transform: uppercase; color: var(--dim) !important; margin-top: 12px !important; }
.built { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 26px; }
.built h3 { font: 600 15px/1.3 var(--sans); margin-bottom: 12px; }
.list { margin: 0; padding-left: 18px; display: grid; gap: 8px; font-size: 13.5px; color: var(--muted); line-height: 1.55; }

/* footer */
.foot { border-top: 1px solid var(--hair); padding: 22px 0 34px; margin-top: 26px; }
.foot-row { display: flex; flex-wrap: wrap; gap: 12px 22px; justify-content: space-between; align-items: center; }
.foot p { margin: 0; font-size: 12.5px; color: var(--dim); }
.foot-links { display: flex; flex-wrap: wrap; gap: 8px 14px; }
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--copper-t); }

.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%);
  background: var(--text); color: var(--ink); padding: 11px 18px; border-radius: 999px;
  font: 500 13px/1 var(--sans); z-index: 60; box-shadow: 0 12px 34px rgba(0, 0, 0, .4);
}

@media (max-width: 900px) {
  .dgrid { grid-template-columns: minmax(0, 1fr); }
  .f { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .stage.all { grid-template-columns: minmax(0, 1fr); }
  .view-tab.all { margin-left: 0; }
  .gauge { gap: 4px; }
  .slot { height: 36px; }
}
@media (max-width: 560px) {
  .hero { padding-top: 42px; }
  .crow { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .out-actions { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .slot::after { transition: none; }
}

/* Review 2026-09-08: limits-list spacing; phone header room for the counter. */
.list + p { margin-top: 14px; }
@media (max-width: 560px) {
  .top-right .btn { display: none; }
  .brand-t i { display: none; }
}