:root {
  color-scheme: light;
  --ink: #1c1915;
  --muted: #5c564c;
  --line: #d9d1c3;
  --paper: #f4f0e6;
  --sheet: #fffdf8;
  --seal: #8c3a2f;
  --focus: #2f5d50;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(90deg, transparent 0 2.2rem, rgba(140, 58, 47, 0.35) 2.2rem 2.28rem, transparent 2.28rem),
    var(--paper);
  font-family: "Iowan Old Style", Palatino, "Palatino Linotype", "Songti SC", "Noto Serif SC", serif;
}

.sheet {
  width: min(32rem, calc(100% - 3.5rem));
  margin: 3.5rem auto 4rem 3.2rem;
  padding: 1.75rem 1.6rem 1.5rem;
  background: var(--sheet);
  border: 1px solid var(--line);
}

.mark {
  margin: 0;
  letter-spacing: 0.14em;
  text-transform: lowercase;
  font-size: 0.78rem;
  color: var(--seal);
}

h1 {
  margin: 0.2rem 0 0.6rem;
  font-size: 2rem;
  font-weight: 600;
}

.lede {
  margin: 0 0 1.4rem;
  color: var(--muted);
  line-height: 1.5;
}

code {
  font-family: "IBM Plex Mono", "Source Code Pro", ui-monospace, monospace;
  font-size: 0.92em;
}

.tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.tab {
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  font: inherit;
  padding: 0.25rem 0.55rem;
  cursor: pointer;
}

.tab.is-on {
  color: var(--ink);
  border-color: var(--line);
  background: #f7f3ea;
}

.panel label {
  display: block;
  margin-bottom: 0.85rem;
  font-size: 0.95rem;
}

input {
  display: block;
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.55rem 0.6rem;
  border: 1px solid var(--line);
  background: #fff;
  color: inherit;
  font: inherit;
}

input:focus {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

button[type="submit"],
#logout {
  border: 0;
  background: var(--ink);
  color: #f7f3ea;
  font: inherit;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
}

button[type="submit"]:disabled,
#logout:disabled {
  opacity: 0.55;
  cursor: wait;
}

.error {
  min-height: 1.3em;
  margin: 0.8rem 0 0;
  color: var(--seal);
}

.facts {
  margin: 0 0 1.2rem;
}

.facts div {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 0.6rem;
  padding: 0.55rem 0;
  border-top: 1px solid var(--line);
}

.facts dt {
  color: var(--muted);
}

.facts dd {
  margin: 0;
  overflow-wrap: anywhere;
}

#remaining {
  font-size: 1.6rem;
  line-height: 1;
}