:root {
  --bg: #faf8f4;
  --surface: #ffffff;
  --ink: #1d1b18;
  --muted: #6b655c;
  --line: #e4ded3;
  --accent: #7a2e2e;
  --accent-soft: #f4e9e6;
  --ai: #24527a;
  --ai-soft: #e6eef6;
  --ok: #2f6b3a;
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "Inter", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #171614;
    --surface: #211f1c;
    --ink: #ece7df;
    --muted: #a49d92;
    --line: #36322d;
    --accent: #e19a8f;
    --accent-soft: #3a2724;
    --ai: #8fb8e0;
    --ai-soft: #1f2d3b;
    --ok: #7fc28b;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.6;
}
a { color: var(--accent); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

.site-header { border-bottom: 1px solid var(--line); background: var(--surface); position: sticky; top: 0; z-index: 5; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-top: 12px; padding-bottom: 12px; }
.brand { font-weight: 700; font-size: 1.15rem; text-decoration: none; color: var(--ink); letter-spacing: -0.01em; }
nav { display: flex; gap: 18px; font-family: var(--sans); font-size: 0.85rem; }
nav a { text-decoration: none; color: var(--muted); }
nav a:hover { color: var(--ink); }

main { padding-top: 32px; padding-bottom: 64px; }
.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-family: var(--sans); font-size: 0.8rem; padding: 24px 0 40px; }

.kicker { font-family: var(--sans); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 0 0 6px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.tag { font-family: var(--sans); font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; padding: 2px 8px; border-radius: 99px; background: var(--accent-soft); color: var(--accent); }
.tag.ai { background: var(--ai-soft); color: var(--ai); }

h1 { font-size: 2.3rem; line-height: 1.15; margin: 0 0 12px; letter-spacing: -0.015em; }
h2 { font-size: 1.5rem; margin: 48px 0 12px; padding-top: 20px; border-top: 1px solid var(--line); }
h3 { font-size: 1.15rem; margin: 28px 0 6px; }
.standfirst { font-size: 1.2rem; color: var(--muted); font-style: italic; margin: 0 0 24px; }

.section-label { font-family: var(--sans); font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); margin: 48px 0 4px; }
.section-label + h2 { margin-top: 0; border-top: 0; padding-top: 0; }

.box { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; margin: 20px 0; }
.ideas dt { font-weight: 700; }
.ideas dd { margin: 0 0 10px; }

blockquote.passage { margin: 16px 0; padding: 20px 22px; background: var(--surface); border-left: 4px solid var(--accent); border-radius: 0 10px 10px 0; font-size: 1.02rem; }
.source { font-family: var(--sans); font-size: 0.8rem; color: var(--muted); margin-top: -6px; }

.task { margin: 24px 0; }
.task-q { font-weight: 600; }
.marks { font-family: var(--sans); font-size: 0.8rem; color: var(--muted); font-weight: 400; }
textarea { width: 100%; min-height: 130px; font-family: var(--serif); font-size: 1rem; line-height: 1.5; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: var(--ink); resize: vertical; }
textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.counter { font-family: var(--sans); font-size: 0.8rem; color: var(--muted); margin-top: 4px; }
.counter.over { color: var(--accent); font-weight: 600; }

details { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 10px 16px; margin: 10px 0; }
summary { cursor: pointer; font-family: var(--sans); font-size: 0.85rem; font-weight: 600; color: var(--accent); }
details[open] summary { margin-bottom: 8px; }

.essay { margin: 18px 0; }
.essay-q { font-size: 1.1rem; font-weight: 600; }
ul.links { padding-left: 20px; }
ul.links li { margin: 4px 0; }

.done-row { margin: 48px 0 0; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; font-family: var(--sans); font-size: 0.9rem; }
button { font-family: var(--sans); font-size: 0.9rem; font-weight: 600; padding: 10px 16px; border-radius: 8px; border: 1px solid var(--accent); background: var(--accent); color: var(--bg); cursor: pointer; }
button.secondary { background: transparent; color: var(--accent); }
.week-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 32px; font-family: var(--sans); font-size: 0.9rem; }

.week-list { list-style: none; padding: 0; margin: 0; }
.week-list li { border-bottom: 1px solid var(--line); }
.week-list a, .week-list .locked { display: grid; grid-template-columns: 56px 1fr auto; gap: 12px; align-items: baseline; padding: 14px 4px; text-decoration: none; color: var(--ink); }
.week-list a:hover { background: var(--surface); }
.week-list .num { font-family: var(--sans); font-size: 0.8rem; color: var(--muted); }
.week-list .t { font-weight: 600; }
.week-list .s { display: block; font-size: 0.9rem; color: var(--muted); font-weight: 400; }
.week-list .status { font-family: var(--sans); font-size: 0.75rem; color: var(--muted); white-space: nowrap; }
.week-list .status.ok { color: var(--ok); font-weight: 600; }
.week-list .locked { color: var(--muted); }
.progress { font-family: var(--sans); font-size: 0.9rem; color: var(--muted); margin-bottom: 16px; }

@media (max-width: 560px) {
  body { font-size: 17px; }
  h1 { font-size: 1.8rem; }
  .week-list a, .week-list .locked { grid-template-columns: 44px 1fr; }
  .week-list .status { grid-column: 2; }
}