:root {
  --bg: #f3f5f1;
  --card: #ffffff;
  --ink: #10201a;
  --muted: #55655d;
  --line: #dde3dc;
  --brand: #14532d;
  --brand-ink: #ffffff;
  --accent: #b45309;
  --focus-bg: #fff4d6;
  --focus-line: #e0a100;
  --prompt-bg: #14532d;
  --prompt-ink: #ffffff;
  --activate: #c2410c;
  --zone: #14532d;
  --review: #1d4ed8;
  --game: #7e22ce;
  --danger: #b91c1c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1410;
    --card: #17221c;
    --ink: #f1f5f0;
    --muted: #a3b3aa;
    --line: #2a3a31;
    --focus-bg: #3a2e08;
    --focus-line: #e0a100;
    --prompt-bg: #1f7a43;
    --activate: #fb923c;
    --zone: #4ade80;
    --review: #93c5fd;
    --game: #d8b4fe;
    --danger: #f87171;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}
h1, h2, h3, p, ul, ol { margin: 0; }
a { color: inherit; text-decoration: none; }

/* Top bar */
#bar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 4px;
  background: var(--brand); color: var(--brand-ink);
  padding: calc(env(safe-area-inset-top) + 10px) calc(env(safe-area-inset-right) + 16px) 10px calc(env(safe-area-inset-left) + 16px);
  min-height: 56px;
}
#back {
  font-size: 38px; line-height: 1; font-weight: 300;
  width: 44px; height: 44px; margin-left: -12px;
  display: flex; align-items: center; justify-content: center; padding-bottom: 6px;
}
#back[hidden] { display: none; }
#bar-text { min-width: 0; }
#bar-kicker { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; opacity: .8; }
#bar-kicker:empty { display: none; }
#bar-title { font-size: 19px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

main {
  max-width: 640px; margin: 0 auto;
  padding: 16px calc(env(safe-area-inset-right) + 16px) calc(env(safe-area-inset-bottom) + 32px) calc(env(safe-area-inset-left) + 16px);
}
.pad { padding: 24px 0; }
.muted { color: var(--muted); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 16px; margin-bottom: 12px;
}
.label {
  font-size: 12px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 8px;
}
.section-title { font-size: 13px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--muted); margin: 22px 4px 8px; }

/* Session list */
.session-card { display: block; }
.session-card h2 { font-size: 21px; line-height: 1.2; margin: 6px 0; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.chip { font-size: 13px; font-weight: 600; padding: 3px 10px; border-radius: 99px; background: var(--bg); border: 1px solid var(--line); }
.chip.brand { background: var(--brand); color: var(--brand-ink); border-color: var(--brand); }

/* Key points */
.card .keypoints { list-style: none; padding: 0; counter-reset: kp; }
.keypoints li { counter-increment: kp; position: relative; padding-left: 40px; margin-top: 12px; }
.keypoints li:first-child { margin-top: 0; }
.keypoints li::before {
  content: counter(kp); position: absolute; left: 0; top: 0;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--brand); color: var(--brand-ink);
  font-weight: 700; font-size: 15px; display: flex; align-items: center; justify-content: center;
}
.keypoints strong { display: block; text-transform: uppercase; letter-spacing: .03em; font-size: 16px; }
.keypoints.compact li { margin-top: 8px; padding-left: 34px; }
.keypoints.compact li::before { width: 24px; height: 24px; font-size: 13px; }
.keypoints.compact strong { font-size: 14px; padding-top: 2px; }

/* Timeline rows */
.rows { background: var(--card); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.row { display: flex; align-items: center; gap: 12px; padding: 14px 12px 14px 14px; border-top: 1px solid var(--line); min-height: 64px; }
.row:first-child { border-top: 0; }
.row:active { background: var(--bg); }
.row .time { width: 58px; flex: none; font-size: 13px; font-weight: 600; color: var(--muted); font-variant-numeric: tabular-nums; }
.row .body { flex: 1; min-width: 0; }
.row .kind { font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
.row .name { font-size: 18px; font-weight: 650; line-height: 1.25; }
.row .chev { color: var(--muted); font-size: 24px; flex: none; }
.kind.activate { color: var(--activate); }
.kind.skill-zone { color: var(--zone); }
.kind.game-zone { color: var(--game); }
.kind.review { color: var(--review); }

/* Introduce / Develop / Stretch and other labelled sections */
.stage { display: inline-block; font-size: 11px; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; padding: 3px 9px; border-radius: 6px; background: var(--muted); color: var(--card); white-space: nowrap; }
.stage.introduce { background: #15803d; color: #fff; }
.stage.develop { background: #b45309; color: #fff; }
.stage.stretch { background: #b91c1c; color: #fff; }
.aim { display: flex; gap: 10px; align-items: flex-start; margin-top: 10px; }
.aim .stage { flex: none; width: 88px; text-align: center; margin-top: 2px; }
.sec-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.sec-head h3 { font-size: 20px; line-height: 1.2; }
.sec-meta { font-size: 14px; font-weight: 600; color: var(--muted); margin: -2px 0 8px; }
.card p + p, .card p + ul, .card ul + p, .card p + ol { margin-top: 10px; }
.card.safety { border: 2px solid var(--danger); }
.card.safety .label { color: var(--danger); }
.card.safety li { font-weight: 600; }

.structure { display: flex; gap: 6px; }
.structure div { flex: 1; text-align: center; background: var(--bg); border-radius: 10px; padding: 8px 2px; font-size: 12px; line-height: 1.25; color: var(--muted); }
.structure b { display: block; font-size: 17px; color: var(--ink); }

/* Block detail */
.block-head { margin: 4px 4px 14px; }
.block-head .kind { font-size: 13px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
.block-head h2 { font-size: 28px; line-height: 1.15; margin: 2px 0 6px; }
.block-head .meta { color: var(--muted); font-size: 15px; font-weight: 600; }

.card ul, .card ol { padding-left: 22px; }
.card li { margin-top: 8px; }
.card li:first-child { margin-top: 0; }

.card.focus { background: var(--focus-bg); border-color: var(--focus-line); border-width: 2px; }
.card.focus .label { color: var(--accent); }
.card.focus ul { list-style: none; padding: 0; }
.card.focus li { font-size: 19px; font-weight: 600; line-height: 1.3; padding-left: 28px; position: relative; margin-top: 10px; }
.card.focus li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 800; }
@media (prefers-color-scheme: dark) { .card.focus .label, .card.focus li::before { color: var(--focus-line); } }

.card.prompt { background: var(--prompt-bg); color: var(--prompt-ink); border-color: transparent; }
.card.prompt .label { color: inherit; opacity: .8; }
.card.prompt p { font-size: 22px; font-weight: 650; line-height: 1.25; }

.mantra { text-align: center; font-size: 20px; font-weight: 800; text-transform: uppercase; letter-spacing: .02em; line-height: 1.3; color: var(--brand-ink); background: var(--brand); border-color: transparent; }

.nav { display: flex; gap: 10px; margin-top: 20px; }
.nav a, .nav span { flex: 1; min-width: 0; border-radius: 14px; padding: 12px 14px; min-height: 60px; }
.nav a { background: var(--card); border: 1px solid var(--line); }
.nav a:active { background: var(--bg); }
.nav a.next { text-align: right; background: var(--brand); color: var(--brand-ink); border-color: var(--brand); }
.nav small { display: block; font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; opacity: .75; }
.nav b { display: block; font-size: 15px; line-height: 1.2; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.status { text-align: center; font-size: 12px; color: var(--muted); margin-top: 24px; }