html { color-scheme: light; padding-top: env(safe-area-inset-top, 0px); padding-bottom: env(safe-area-inset-bottom, 0px); }
body { margin: 0; }
img { max-width: 100%; }
[hidden] { display: none !important; }
/* Layout: a single reading column like a lab binder; a sticky tab rail of sections, Giemsa-stain palette (violet nuclei, eosin pink) */
:root {
  --bg: #f7f6fa;
  --surface: #ffffff;
  --ink: #1d1a26;
  --muted: #5e5870;
  --line: #e2dfea;
  --giemsa: #5a3e94;      /* nuclear violet */
  --giemsa-soft: #eee9f7;
  --eosin: #b8406b;       /* cytoplasm pink */
  --eosin-soft: #f9e8ee;
  --ok: #2f7a4f;
  --ok-soft: #e4f2e9;
  --font-display: "Newsreader", Georgia, "Times New Roman", serif;
  --font-body: "Public Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15131b; --surface: #1e1b26; --ink: #ece9f3; --muted: #a8a1b9; --line: #322d3e;
    --giemsa: #b49cec; --giemsa-soft: #2a2340; --eosin: #ec8bae; --eosin-soft: #3a2130;
    --ok: #7fd1a0; --ok-soft: #1c3226; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #15131b; --surface: #1e1b26; --ink: #ece9f3; --muted: #a8a1b9; --line: #322d3e;
  --giemsa: #b49cec; --giemsa-soft: #2a2340; --eosin: #ec8bae; --eosin-soft: #3a2130;
  --ok: #7fd1a0; --ok-soft: #1c3226; color-scheme: dark;
}
* { box-sizing: border-box; }
body {
  background: var(--bg); color: var(--ink);
  font-family: var(--font-body); font-size: 16px; line-height: 1.6;
}
.wrap {
  max-width: 760px; margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 32px 80px;
}
h1, h2, h3 { font-family: var(--font-display); text-wrap: balance; line-height: 1.2; margin: 0; }
h1 { font-size: clamp(2rem, 5vw, 2.6rem); font-weight: 600; }
h2 { font-size: 1.6rem; font-weight: 600; }
h3 { font-size: 1.15rem; font-weight: 600; font-family: var(--font-body); }
p { margin: 0; }
.eyebrow {
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--giemsa);
}
.lede { color: var(--muted); max-width: 62ch; }
header.top { display: grid; gap: 12px; margin-bottom: 24px; }

/* Appointment slip */
.slip {
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
  display: grid; grid-template-columns: auto 1fr; overflow: hidden;
}
.slip .when {
  background: var(--giemsa); color: var(--bg); padding: 18px 20px;
  display: grid; align-content: center; justify-items: center; text-align: center; gap: 2px; min-width: 120px;
}
.slip .when .day { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; }
.slip .when .date { font-family: var(--font-display); font-size: 2.2rem; line-height: 1; }
.slip .when .time { font-family: var(--font-mono); font-size: 1rem; }
.slip .body { padding: 16px 20px; display: grid; gap: 10px; min-width: 0; }
.kv { display: grid; grid-template-columns: 110px 1fr; gap: 4px 12px; font-size: 0.93rem; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; min-width: 0; overflow-wrap: anywhere; }
.mono { font-family: var(--font-mono); font-size: 0.9em; font-variant-numeric: tabular-nums; }
.countdown { font-family: var(--font-mono); font-size: 0.85rem; color: var(--eosin); }
button.copy {
  font: inherit; font-size: 0.8rem; padding: 2px 8px; margin-left: 6px; border-radius: 6px;
  border: 1px solid var(--line); background: var(--bg); color: var(--ink); cursor: pointer;
}
button.copy:hover { border-color: var(--giemsa); }
button:focus-visible, summary:focus-visible, a:focus-visible, input:focus-visible { outline: 2px solid var(--giemsa); outline-offset: 2px; }
a { color: var(--giemsa); }

/* Section rail */
nav.rail {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5;
  background: var(--bg); border-bottom: 1px solid var(--line);
  margin: 28px 0 8px; padding-block: 10px;
  display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none;
}
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--bg); }
nav.rail a {
  flex: none; text-decoration: none; color: var(--muted); font-size: 0.85rem; font-weight: 500;
  padding: 4px 10px; border-radius: 999px; border: 1px solid transparent;
}
nav.rail a:hover { color: var(--ink); border-color: var(--line); }

section { display: grid; gap: 14px; padding-top: 36px; scroll-margin-top: 60px; }
section > p, section > ul, section > ol { max-width: 66ch; }
ul, ol { margin: 0; padding-left: 1.2em; display: grid; gap: 6px; }

/* Bridge table: what they need vs what you bring */
.tablewrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: 0.92rem; min-width: 560px; }
th, td { text-align: left; vertical-align: top; padding: 10px 14px; border-bottom: 1px solid var(--line); }
th { font-size: 0.75rem; font-family: var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
tr:last-child td { border-bottom: 0; }
.chip { display: inline-block; font-size: 0.72rem; font-weight: 600; padding: 1px 8px; border-radius: 999px; white-space: nowrap; }
.chip.have { background: var(--ok-soft); color: var(--ok); }
.chip.part { background: var(--giemsa-soft); color: var(--giemsa); }
.chip.gap { background: var(--eosin-soft); color: var(--eosin); }

/* German script block */
.say {
  background: var(--giemsa-soft); border-radius: 10px; padding: 16px 18px;
  font-size: 0.97rem; display: grid; gap: 10px; max-width: 66ch;
}
.say p { line-height: 1.65; }
.say .tag { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--giemsa); }

/* Q&A */
.qa { display: grid; gap: 8px; }
details {
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 0 16px;
}
details[open] { padding-bottom: 14px; }
summary {
  cursor: pointer; list-style: none; padding: 12px 0; font-weight: 600;
  display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: baseline;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-family: var(--font-mono); color: var(--muted); }
details[open] summary::after { content: "−"; }
summary .en { display: block; font-weight: 400; color: var(--muted); font-size: 0.85rem; }
details .ans { display: grid; gap: 8px; font-size: 0.95rem; }
details .ans .de { border-left: 3px solid var(--giemsa); padding-left: 12px; }
.callout {
  border-left: 3px solid var(--eosin); background: var(--eosin-soft); padding: 12px 16px; border-radius: 0 10px 10px 0;
  max-width: 66ch; font-size: 0.95rem;
}

/* Science refresher grid */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; display: grid; gap: 8px; align-content: start; min-width: 0; }
.card h3 { color: var(--giemsa); }
.card ul { font-size: 0.9rem; }

/* Checklist */
.check { display: grid; gap: 8px; }
.check label { display: grid; grid-template-columns: auto 1fr; gap: 10px; align-items: start; cursor: pointer; }
.check input { margin-top: 5px; accent-color: var(--giemsa); width: 16px; height: 16px; }
.check input:checked + span { color: var(--muted); text-decoration: line-through; }
.sources { font-size: 0.82rem; color: var(--muted); display: grid; gap: 4px; }
.sources a { overflow-wrap: anywhere; }

@media (max-width: 520px) {
  .slip { grid-template-columns: 1fr; }
  .slip .when { grid-auto-flow: column; justify-content: start; gap: 12px; padding: 12px 16px; }
  .slip .when .date { font-size: 1.6rem; }
  .kv { grid-template-columns: 1fr; }
  .kv dt { margin-top: 6px; }
}
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }