:root {
  --bg: #F5F1E8;
  --ink: #29383C;
  --accent: #B86149;
  --sage: #6D8E82;
  --paper: #FFFEFA;
  --panel: #263A40;
  --line: #D8D4CA;
  --mute: #727D7C;
  --range: #DDE9E2;
  --serif: Georgia, "Times New Roman", serif;
  --sans: "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
  --max: 1240px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.55;
  background-color: var(--bg);
  background-image:
    repeating-linear-gradient(to bottom, transparent 0, transparent 31px, rgba(41, 56, 60, 0.04) 32px),
    linear-gradient(to right, transparent 47px, rgba(41, 56, 60, 0.05) 48px, transparent 49px);
}

body::before,
body::after {
  content: "";
  position: fixed;
  width: 14px;
  height: 14px;
  background: url("../svg/register.svg") center / 14px no-repeat;
  opacity: 0.22;
  pointer-events: none;
}

body::before { top: 10px; left: 10px; }
body::after { bottom: 14px; right: 14px; }

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--panel); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 8px;
}
.skip:focus { left: 8px; z-index: 30; background: var(--paper); padding: 8px 12px; }

.wrap {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.site-header {
  height: 68px;
  border-bottom: 1px solid var(--line);
  background: rgba(245, 241, 232, 0.94);
  position: sticky;
  top: 0;
  z-index: 12;
}

.site-header .wrap {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.wordmark {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--serif);
  font-weight: 700;
  letter-spacing: 0.1em;
}
.wordmark span:first-child { font-size: 12px; }
.wordmark span:last-child { font-size: 16px; }

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.site-nav a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] { border-bottom-color: var(--accent); }

[data-nav-toggle] { display: none; }

.kicker {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mute);
  margin: 0 0 8px;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 12px;
}
h1 { font-size: clamp(30px, 4vw, 44px); }
h2 { font-size: clamp(22px, 3vw, 32px); }
h3 { font-size: 20px; }

.lede { max-width: 64ch; margin: 0 0 18px; }
.muted { color: var(--mute); }
.section { padding: 40px 0; border-top: 1px solid var(--line); }
.section-tight { padding: 28px 0; }

.spread {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 28px;
  align-items: start;
}

.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 20px;
  position: relative;
}
.panel::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 28px;
  height: 28px;
  background: url("../svg/fold.svg") top right / 28px no-repeat;
  pointer-events: none;
}

.instrument {
  background: var(--panel);
  color: #F5F1E8;
  padding: 24px;
}

label,
.lbl {
  display: block;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 12px 0 6px;
}

input[type="date"],
input[type="number"],
select {
  width: 100%;
  min-height: 44px;
  font: 16px/1.3 var(--mono);
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 8px 10px;
}

.checks label {
  display: flex;
  gap: 8px;
  align-items: center;
  text-transform: none;
  letter-spacing: 0;
  font-size: 14px;
  margin: 10px 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.btn,
button.btn,
a.btn {
  appearance: none;
  border: 1px solid var(--panel);
  background: var(--panel);
  color: var(--paper);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 12px 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

.btn-ghost,
a.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.instrument .btn-ghost {
  color: #F5F1E8;
  border-color: rgba(255, 254, 250, 0.35);
}

.giant {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(54px, 8vw, 104px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin: 0;
}

.stamp-ring {
  width: 48px;
  height: 48px;
  background: url("../svg/stamp.svg") center / 48px no-repeat;
  opacity: 0.55;
}

.msg { color: var(--accent); min-height: 1.3em; }

.tab-rail {
  display: flex;
  gap: 0;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0;
}

.tool-tab {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-bottom: 0;
  background: #efebe1;
  color: var(--ink);
  text-decoration: none;
  padding: 12px 16px 14px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-right: 4px;
  clip-path: polygon(8px 0, 100% 0, 100% 100%, 0 100%, 0 10px);
}
.tool-tab.is-active {
  background: var(--paper);
  border-color: var(--accent);
}

.row-instrument {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  gap: 12px;
  align-items: end;
}

.workbench {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.weekday-hero {
  font-family: var(--serif);
  font-size: clamp(42px, 7vw, 84px);
  letter-spacing: 0.04em;
  margin: 0;
}

.example-row {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 8px 18px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.example-row h3,
.example-row p { grid-column: 2; }
.example-row .btn { grid-column: 3; grid-row: 1 / span 4; align-self: center; }

.ref-list article {
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.scenario {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.scenario:nth-child(even) { direction: rtl; }
.scenario:nth-child(even) > * { direction: ltr; }

.article-body { max-width: 68ch; }
.article-body p { margin: 0 0 14px; }
.article-body h2 { margin-top: 28px; }

.faq details { border-top: 1px solid var(--line); padding: 10px 0; }
.faq summary { cursor: pointer; font-family: var(--serif); font-weight: 700; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 22px 0 40px;
  font-size: 14px;
}
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin: 10px 0;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.site-footer a { color: var(--ink); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }

.live {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.address { font-style: normal; line-height: 1.7; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

@media (max-width: 760px) {
  .site-header { height: auto; }
  .site-header .wrap { height: auto; min-height: 68px; padding: 10px 0; }
  [data-nav-toggle] { display: inline-block; }
  .site-nav { display: none; width: 100%; flex-direction: column; padding-bottom: 12px; }
  .site-nav.is-open { display: flex; }
  .spread,
  .workbench,
  .row-instrument,
  .scenario,
  .example-row {
    grid-template-columns: 1fr;
    direction: ltr;
  }
  .example-row .btn { grid-column: 1; grid-row: auto; }
  .example-row h3,
  .example-row p { grid-column: 1; }
  .btn { width: 100%; text-align: center; }
  .wrap { width: min(var(--max), calc(100% - 20px)); }
}