/* Steepfield — tea-brewing notebook. Ink on paper, a faded apricot ring. System fonts only. */

:root {
  --paper: #f6f1e9;
  --paper-2: #ede5d8;
  --ink: #161310;
  --ink-2: #514a41;
  --ink-3: #6b6259;
  --rule: #cdc2b1;
  --apricot: #efc09a;
  --apricot-2: #f7ddc6;
  --apricot-ink: #8a4a1f;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --gap: clamp(72px, 10vw, 140px);
  --wrap: 1120px;
  --pad: clamp(20px, 4vw, 40px);
}

*, *::before, *::after { box-sizing: border-box; }

html { color-scheme: light; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--serif);
  font-feature-settings: "onum" 1, "kern" 1;
}

h1, h2, h3, h4 { font-weight: 400; line-height: 1.15; margin: 0; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
a { color: inherit; text-decoration-color: var(--apricot-ink); text-underline-offset: 0.16em; }
a:hover { color: var(--apricot-ink); }
:focus-visible { outline: 2px solid var(--apricot-ink); outline-offset: 3px; border-radius: 2px; }
mark { background: var(--apricot); color: inherit; padding: 0 0.12em; box-decoration-break: clone; }
code, .mono { font-family: var(--mono); font-size: 0.875em; }

.skip {
  position: absolute; left: var(--pad); top: -3rem; background: var(--ink); color: var(--paper);
  padding: 0.5rem 0.9rem; z-index: 10;
}
.skip:focus { top: 0.75rem; }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--pad); }

/* Label: small mono caps used for numerals, table heads, form labels */
.label {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink-3);
}

/* ---------- Header ---------- */
.site-header { border-bottom: 1px solid var(--rule); }
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; min-height: 4.25rem;
}
.brand { display: inline-flex; align-items: center; gap: 0.6rem; text-decoration: none; font-size: 1.2rem; }
.brand svg { width: 1.5rem; height: 1.5rem; }
.nav-toggle {
  display: none; font: inherit; background: none; border: 1px solid var(--ink); color: var(--ink);
  padding: 0.35rem 0.8rem; cursor: pointer;
}
.nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: clamp(1rem, 2.5vw, 2rem); }
.nav a { text-decoration: none; padding-block: 0.4rem; border-bottom: 1px solid transparent; }
.nav a:hover { border-bottom-color: var(--apricot-ink); }

/* ---------- Intro: statement + contents index ---------- */
.intro { padding-block: clamp(56px, 8vw, 112px) var(--gap); }
.intro .wrap { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(2rem, 6vw, 6rem); }
.intro h1 { font-size: clamp(2rem, 4.4vw, 3.5rem); max-width: 16ch; text-wrap: balance; }
.intro .lede { font-size: 1.15rem; color: var(--ink-2); max-width: 44ch; margin-top: 1.5rem; }
.index { border-top: 1px solid var(--ink); }
.index ol { list-style: none; margin: 0; padding: 0; }
.index li { border-bottom: 1px solid var(--rule); }
.index a {
  display: grid; grid-template-columns: 3rem 1fr auto; align-items: baseline; gap: 1rem;
  padding: 0.8rem 0; text-decoration: none;
}
.index a:hover { background: var(--apricot-2); margin-inline: -0.5rem; padding-inline: 0.5rem; }
.index .label { color: var(--apricot-ink); }
.index small { color: var(--ink-3); font-size: 0.9rem; }

/* ---------- Sections ---------- */
.section { padding-block: var(--gap); border-top: 1px solid var(--rule); }
.section__head { display: grid; grid-template-columns: 3rem 1fr; gap: 1rem; margin-bottom: clamp(2rem, 4vw, 3.5rem); }
.section__head .label { padding-top: 0.55rem; color: var(--apricot-ink); }
.section__head h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); }
.section__head p { color: var(--ink-2); max-width: 60ch; margin: 0.75rem 0 0; }

/* ---------- Steeping tables ---------- */
.tables { display: grid; grid-template-columns: minmax(0, 1fr) 200px; gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.tbl { width: 100%; border-collapse: collapse; border-top: 1px solid var(--ink); }
.tbl caption { text-align: left; padding: 0 0 0.75rem; color: var(--ink-2); }
.tbl th { text-align: left; font-weight: 400; padding: 0.7rem 0.75rem 0.7rem 0; vertical-align: bottom; }
.tbl td { padding: 0.8rem 0.75rem 0.8rem 0; border-top: 1px solid var(--rule); vertical-align: top; }
.tbl tbody tr:hover { background: var(--apricot-2); }
.tbl td:first-child { font-style: italic; }
.tbl .mono { white-space: nowrap; }
.tbl-note { color: var(--ink-3); font-size: 0.92rem; margin-top: 1rem; max-width: 70ch; }
.ladder { margin: 0; }
.ladder svg { width: 100%; height: auto; display: block; }
.ladder figcaption { font-size: 0.9rem; color: var(--ink-3); margin-top: 0.5rem; }

/* ---------- Timer ---------- */
.timer { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(2rem, 5vw, 5rem); }
.timer fieldset { border: 0; padding: 0; margin: 0 0 1.5rem; min-width: 0; }
.timer legend { padding: 0; margin-bottom: 0.5rem; }
.field { display: grid; gap: 0.35rem; margin-bottom: 1.25rem; }
.timer select, .timer input[type="number"] {
  font: inherit; color: inherit; background: var(--paper); border: 1px solid var(--ink); border-radius: 0;
  padding: 0.55rem 0.7rem; width: 100%; max-width: 22rem;
}
.timer input[type="number"] { max-width: 6rem; font-family: var(--mono); }
.choices { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.choices label {
  border: 1px solid var(--rule); padding: 0.4rem 0.85rem; cursor: pointer; display: inline-flex; gap: 0.5rem;
  align-items: center;
}
.choices label:has(:checked) { border-color: var(--ink); background: var(--apricot-2); }
.choices input { margin: 0; accent-color: var(--apricot-ink); }
.spec {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 0 0 2rem; border-top: 1px solid var(--ink);
}
.spec div { padding-top: 0.75rem; }
.spec dt { margin-bottom: 0.2rem; }
.spec dd { margin: 0; font-size: 1.15rem; }
.clock { border-top: 1px solid var(--ink); padding-top: 1rem; }
.clock__digits {
  font-family: var(--mono); font-size: clamp(4rem, 12vw, 7.5rem); line-height: 1; margin: 0.25rem 0 1rem;
  font-variant-numeric: tabular-nums; letter-spacing: -0.02em;
}
.clock.is-done .clock__digits { color: var(--apricot-ink); }
.bar { height: 3px; background: var(--paper-2); margin-bottom: 1.5rem; }
.bar span { display: block; height: 100%; width: 0; background: var(--apricot-ink); transition: width 0.25s linear; }
.controls { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center; }
.btn {
  font: inherit; color: var(--ink); background: none; border: 1px solid var(--ink); padding: 0.55rem 1.1rem;
  cursor: pointer; border-radius: 0; min-width: 5.5rem;
}
.btn:hover { background: var(--apricot-2); }
.btn--primary { background: var(--ink); color: var(--paper); }
.btn--primary:hover { background: var(--apricot-ink); border-color: var(--apricot-ink); }
.btn--small { min-width: 0; padding: 0.55rem 0.75rem; font-family: var(--mono); font-size: 0.85rem; }
.chime { margin-left: auto; display: inline-flex; gap: 0.5rem; align-items: center; color: var(--ink-2); }
.chime input { accent-color: var(--apricot-ink); margin: 0; }
.status { margin: 1rem 0 0; color: var(--ink-2); min-height: 1.6em; }
.timer-note { margin-top: 1.5rem; color: var(--ink-3); font-size: 0.92rem; }

/* ---------- Vocabulary ---------- */
.vocab { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1.5rem, 4vw, 3.5rem); }
.vocab h3 { border-top: 1px solid var(--ink); padding-top: 0.75rem; font-size: 1rem; margin-bottom: 1rem; }
.vocab dl { margin: 0; }
.vocab dt { font-style: italic; margin-top: 0.9rem; }
.vocab dd { margin: 0.1rem 0 0; color: var(--ink-2); font-size: 0.97rem; }

/* ---------- Guides ---------- */
.guides { border-top: 1px solid var(--ink); }
.guide { border-bottom: 1px solid var(--rule); }
.guide summary {
  list-style: none; cursor: pointer; display: grid; grid-template-columns: 3rem 1fr auto; gap: 1rem;
  align-items: baseline; padding: 1.1rem 0; font-size: clamp(1.15rem, 2vw, 1.4rem);
}
.guide summary::-webkit-details-marker { display: none; }
.guide summary:hover { color: var(--apricot-ink); }
.guide summary .label { color: var(--apricot-ink); }
.guide summary .glyph { font-family: var(--mono); color: var(--ink-3); }
.guide summary .glyph::before { content: "+"; }
.guide[open] summary .glyph::before { content: "−"; }
.guide__body { padding: 0 0 2rem 4rem; max-width: 72ch; }
.guide__body p:last-child { margin-bottom: 0; }
.guide__body .tbl { margin: 1rem 0; font-size: 0.97rem; }
.guide__body .tbl td:first-child { font-style: normal; }
.guide__body ul { padding-left: 1.2rem; margin: 0 0 1em; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--ink); padding-block: clamp(2.5rem, 5vw, 4rem); color: var(--ink-2); }
.site-footer .wrap { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(2rem, 5vw, 5rem); }
.site-footer h2 { font-size: 1.05rem; margin-bottom: 0.5rem; color: var(--ink); }
.site-footer p { font-size: 0.95rem; max-width: 60ch; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { border-bottom: 1px solid var(--rule); }
.site-footer li a { display: block; padding: 0.5rem 0; text-decoration: none; }
.site-footer li a:hover { color: var(--apricot-ink); }
.colophon { margin-top: 1.5rem; font-size: 0.85rem; color: var(--ink-3); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .vocab { grid-template-columns: 1fr 1fr; }
  .tables { grid-template-columns: 1fr; }
  .ladder { max-width: 260px; }
}

@media (max-width: 720px) {
  .js .nav-toggle { display: inline-block; }
  .js .nav { display: none; width: 100%; }
  .js .nav.is-open { display: block; }
  .site-header .wrap { flex-wrap: wrap; padding-block: 0.75rem; }
  .nav ul { flex-direction: column; gap: 0; border-top: 1px solid var(--rule); margin-top: 0.5rem; }
  .nav li { border-bottom: 1px solid var(--rule); }
  .nav a { display: block; padding-block: 0.75rem; border-bottom: 0; }
  .intro .wrap, .timer, .site-footer .wrap { grid-template-columns: 1fr; }
  .vocab { grid-template-columns: 1fr; }
  .section__head { grid-template-columns: 1fr; gap: 0.25rem; }
  .guide summary { grid-template-columns: 2.5rem 1fr auto; }
  .guide__body { padding-left: 0; }
  .spec { grid-template-columns: 1fr 1fr; }
  .chime { margin-left: 0; width: 100%; }

  /* Steeping table stacks into ruled entries; ARIA roles in the markup keep table semantics. */
  .tbl--stack thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .tbl--stack, .tbl--stack tbody, .tbl--stack tr, .tbl--stack td { display: block; }
  .tbl--stack tr { border-top: 1px solid var(--rule); padding: 0.75rem 0; }
  .tbl--stack td { border: 0; padding: 0.15rem 0; display: grid; grid-template-columns: 7.5rem 1fr; gap: 0.75rem; }
  .tbl--stack td::before {
    content: attr(data-l); font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em;
    text-transform: uppercase; color: var(--ink-3); padding-top: 0.3em;
  }
  .tbl--stack td:first-child { font-size: 1.15rem; font-style: normal; grid-template-columns: 1fr; }
  .tbl--stack td:first-child::before { content: none; }
  .tbl .mono { white-space: normal; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bar span { transition: none; }
}

@media print {
  .site-header, .timer, .site-footer ul, .skip { display: none; }
  .guide { break-inside: avoid; }
  .guide[open] summary .glyph, .guide summary .glyph { display: none; }
}