:root {
  --paper: #FFFFFF;
  --field: #FAF9F6;
  --white: #FFFFFF;
  --ink: #1B1A17;
  --graphite: #6B6860;
  --rule: #E6E2D8;
  --vermilion: #C8371B;
  --serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --sans: "IBM Plex Sans", "Helvetica Neue", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--paper);
  color: var(--ink);
  font: 400 16px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
}

.sheet {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto;
  gap: 40px;
  padding: max(28px, env(safe-area-inset-top)) 20px max(20px, env(safe-area-inset-bottom));
  max-width: 1240px;
  margin: 0 auto;
}

/* Masthead */
.kicker {
  display: flex;
  gap: 18px;
  margin: 0 0 18px;
  font: 500 12px/1 var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--graphite);
}
.kicker span:first-child { color: var(--vermilion); }

.wordmark {
  margin: 0;
  font: 400 clamp(76px, 22vw, 108px)/.86 var(--serif);
  letter-spacing: -0.02em;
}
.wordmark em { font-style: italic; color: var(--vermilion); }

.lede {
  margin: 18px 0 0;
  max-width: 22ch;
  font: 400 21px/1.3 var(--serif);
  color: var(--graphite);
}

/* Form panel */
.panel {
  align-self: start;
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 28px 22px 24px;
}
.panel-title {
  margin: 0 0 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
  font: 600 13px/1 var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.field { margin-bottom: 18px; }
.label-row { display: flex; justify-content: space-between; align-items: baseline; }
label { display: block; font-weight: 500; font-size: 14px; margin-bottom: 6px; }

input[type=email], input[type=password], input[type=text] {
  width: 100%;
  height: 48px;
  padding: 0 14px;
  font: 400 16px var(--sans);
  color: var(--ink);
  background: var(--field);
  border: 1px solid #D4CFC3;
  border-radius: 3px;
  outline: none;
  transition: border-color .15s, background-color .15s;
}
input:hover { border-color: #B9B3A5; }
input:focus { border-color: var(--ink); background: var(--white); }
input[aria-invalid=true] { border-color: var(--vermilion); }

.pw-wrap { position: relative; }
.pw-wrap input { padding-right: 72px; }
.reveal {
  position: absolute; right: 4px; top: 4px; bottom: 4px;
  min-width: 60px;
  border: 0; border-radius: 2px;
  background: transparent;
  font: 500 12px var(--mono);
  letter-spacing: .05em; text-transform: uppercase;
  color: var(--graphite);
  cursor: pointer;
}
.reveal:hover, .reveal:focus-visible { color: var(--ink); background: var(--rule); }

.hint {
  min-height: 18px;
  margin: 5px 0 0;
  font: 400 12.5px/1.4 var(--mono);
  color: var(--vermilion);
}

a { color: var(--ink); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--vermilion); }
.small-link { font-size: 13px; color: var(--graphite); }

:focus-visible { outline: 2px solid var(--vermilion); outline-offset: 2px; }
input:focus-visible { outline: none; }

/* Checkbox */
.check {
  display: flex; align-items: center; gap: 10px;
  margin: 4px 0 24px;
  font-weight: 400; font-size: 14px;
  cursor: pointer; user-select: none;
  min-height: 32px;
}
.check input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.check .box {
  width: 18px; height: 18px; flex: none;
  border: 1.5px solid var(--ink); border-radius: 2px;
  display: grid; place-items: center;
}
.check input:checked + .box::after {
  content: ""; width: 9px; height: 5px;
  border: solid var(--vermilion); border-width: 0 0 2px 2px;
  transform: translateY(-1px) rotate(-45deg);
}
.check input:focus-visible + .box { outline: 2px solid var(--vermilion); outline-offset: 2px; }

/* Submit + the one motion moment: a red proof tick */
.submit {
  position: relative;
  width: 100%; height: 52px;
  border: 0; border-radius: 3px;
  background: var(--ink); color: var(--paper);
  font: 500 16px var(--sans);
  cursor: pointer;
  overflow: hidden;
  transition: background-color .2s;
}
.submit:hover { background: #33312C; }
.submit:active { transform: translateY(1px); }
.submit .tick {
  position: absolute; left: 50%; top: 50%;
  width: 30px; height: 21px;
  transform: translate(-50%, -50%);
  fill: none; stroke: var(--vermilion); stroke-width: 4;
  stroke-linecap: round; stroke-linejoin: round;
  stroke-dasharray: 52; stroke-dashoffset: 52;
}
.submit.is-done { background: var(--white); box-shadow: inset 0 0 0 1.5px var(--ink); }
.submit.is-done .submit-label { opacity: 0; }
.submit.is-done .tick { animation: draw .55s cubic-bezier(.6,.05,.3,1) .05s forwards; }
.submit.is-busy .submit-label { opacity: .5; }
@keyframes draw { to { stroke-dashoffset: 0; } }

.status { min-height: 20px; margin: 10px 0 0; font: 400 13px var(--mono); color: var(--graphite); text-align: center; }

.alt { margin: 22px 0 0; padding-top: 18px; border-top: 1px dashed var(--rule); font-size: 14px; color: var(--graphite); }

.foot {
  display: flex; justify-content: space-between;
  font-size: 12.5px; color: var(--graphite);
  border-top: 1px solid var(--rule); padding-top: 14px;
}
.mono { font-family: var(--mono); }

/* Desktop: asymmetric two-column sheet, masthead bottom-left, form top-right */
@media (min-width: 880px) {
  .sheet {
    grid-template-columns: 1fr 400px;
    grid-template-rows: 1fr auto;
    column-gap: 9vw;
    row-gap: 40px;
    padding: 56px 64px 28px;
  }
  .masthead { grid-column: 1; grid-row: 1; align-self: end; padding-bottom: 8px; }
  .wordmark { font-size: clamp(140px, 17vw, 232px); }
  .lede { font-size: 28px; margin-top: 26px; }
  .panel { grid-column: 2; grid-row: 1; align-self: center; padding: 34px 32px 28px; }
  .foot { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  .submit.is-done .tick { animation: none; stroke-dashoffset: 0; }
  * { transition: none !important; }
}