:root {
  --bg: #f5f2ea;
  --surface: #fffdf8;
  --surface-2: #eef1ea;
  --ink: #1d2826;
  --muted: #5b6763;
  --line: #dcdcd0;
  --accent: #2c6e63;
  --accent-ink: #ffffff;
  --accent-soft: #dcebe5;
  --sky-1: #cfe3ea;
  --sky-2: #f3dcc4;
  --hill-1: #9fbfae;
  --hill-2: #6f9c89;
  --tile: #f1eee4;
  --w0: #2a9d8f; --w1: #e76f51; --w2: #d49a1c; --w3: #7b61c9; --w4: #3a7ec6;
  --w5: #5a9e3a; --w6: #d0508f; --w7: #8a6a4a; --w8: #1f8fae; --w9: #b8543a;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(30, 40, 35, .06), 0 6px 24px rgba(30, 40, 35, .06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121816;
    --surface: #1a2220;
    --surface-2: #202a27;
    --ink: #e8ece8;
    --muted: #a3b0ab;
    --line: #2e3a36;
    --accent: #6cc3b2;
    --accent-ink: #0d1a17;
    --accent-soft: #1f3631;
    --sky-1: #1d2d36;
    --sky-2: #33291f;
    --hill-1: #294338;
    --hill-2: #1e342b;
    --tile: #25302d;
    --w0: #4cc3b3; --w1: #f08a6e; --w2: #e8b640; --w3: #a28cf0; --w4: #6aa7ea;
    --w5: #85c860; --w6: #eb7cb2; --w7: #c29a74; --w8: #4fb8d8; --w9: #e0795e;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
h1, h2, h3 { line-height: 1.2; font-family: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: clamp(1.9rem, 4.5vw, 2.8rem); margin: .2em 0 .3em; }
h2 { font-size: 1.5rem; margin: 2rem 0 .75rem; }
h3 { font-size: 1.15rem; margin: 1.25rem 0 .5rem; }
p { margin: 0 0 1rem; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 10; }

/* Header */
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.site-header .wrap { display: flex; align-items: center; gap: 16px; min-height: 60px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--ink); text-decoration: none; font-size: 1.1rem; }
.brand svg { width: 30px; height: 30px; }
.nav { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.nav a { color: var(--ink); text-decoration: none; padding: 6px 10px; border-radius: 999px; font-size: .95rem; }
.nav a:hover, .nav a[aria-current] { background: var(--accent-soft); color: var(--accent); }
.menu-toggle { display: none; }
@media (max-width: 760px) {
  .menu-toggle { display: inline-flex; margin-left: auto; background: none; border: 1px solid var(--line); border-radius: 10px; padding: 6px 10px; color: var(--ink); font: inherit; }
  .nav { display: none; width: 100%; margin: 0 0 10px; }
  .nav.open { display: flex; }
}

/* Hero */
.hero { background: linear-gradient(180deg, var(--sky-1), var(--sky-2)); position: relative; overflow: hidden; }
.hero .wrap { position: relative; z-index: 1; padding-top: 48px; padding-bottom: 96px; }
.hero p.lead { font-size: 1.15rem; max-width: 640px; color: var(--ink); }
.hero .hills { position: absolute; left: 0; right: 0; bottom: 0; width: 100%; height: 120px; }
.hero .hills .h1 { fill: var(--hill-1); }
.hero .hills .h2 { fill: var(--hill-2); }
.hero .hills .h3 { fill: var(--bg); }
.page-head { padding: 28px 0 8px; }

/* Cards & layout */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.grid { display: grid; gap: 16px; }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid.three { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid.ranges { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.grid.levels { grid-template-columns: repeat(auto-fill, minmax(92px, 1fr)); gap: 8px; }
.tile-link { display: block; padding: 10px 12px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; text-decoration: none; color: var(--ink); }
.tile-link:hover { border-color: var(--accent); }
.tile-link strong { display: block; color: var(--accent); }
.tile-link span { font-size: .85rem; color: var(--muted); }
.muted { color: var(--muted); }
.small { font-size: .9rem; }
main { padding-bottom: 48px; }

.search-box { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0 8px; max-width: 640px; }
.search-box input { flex: 1 1 220px; min-width: 0; font: inherit; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; font: inherit; font-weight: 700; padding: 11px 18px; border-radius: 12px; border: 0; background: var(--accent); color: var(--accent-ink); text-decoration: none; cursor: pointer; }
.btn.ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn:hover { filter: brightness(1.05); }

/* Breadcrumbs */
.crumbs { font-size: .9rem; color: var(--muted); padding-top: 18px; }
.crumbs ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.crumbs li + li::before { content: "›"; margin-right: 6px; color: var(--muted); }
.crumbs a { color: var(--muted); }

/* Meta chips */
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 18px; padding: 0; list-style: none; }
.meta li { background: var(--surface-2); border-radius: 999px; padding: 4px 12px; font-size: .9rem; }
.meta li.hard { background: #f6ddd4; color: #8a2f16; }
@media (prefers-color-scheme: dark) { .meta li.hard { background: #3d2219; color: #f3b5a0; } }

/* Answers */
.answer-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 800px) { .answer-layout { grid-template-columns: 1fr; } }
.words { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.words li { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border-radius: 12px; background: var(--surface-2); }
.words .dot { width: 12px; height: 12px; border-radius: 50%; flex: none; }
.words .w { font-weight: 800; letter-spacing: .08em; font-size: 1.1rem; }
.words .n { margin-left: auto; color: var(--muted); font-size: .85rem; white-space: nowrap; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; padding: 0; list-style: none; margin: 0; }
.chips li { padding: 3px 10px; border: 1px solid var(--line); border-radius: 999px; font-size: .88rem; letter-spacing: .04em; }
.d0 { background: var(--w0); } .d1 { background: var(--w1); } .d2 { background: var(--w2); } .d3 { background: var(--w3); } .d4 { background: var(--w4); }
.d5 { background: var(--w5); } .d6 { background: var(--w6); } .d7 { background: var(--w7); } .d8 { background: var(--w8); } .d9 { background: var(--w9); }

/* Board */
.board { display: flex; justify-content: center; }
.board svg { width: 100%; height: auto; max-width: 420px; }
.board .t { fill: var(--tile); stroke: var(--line); }
.board text { fill: var(--ink); font: 800 19px ui-sans-serif, -apple-system, "Segoe UI", Roboto, sans-serif; text-anchor: middle; dominant-baseline: central; }
.board .p { fill: none; stroke-width: 7; stroke-linecap: round; stroke-linejoin: round; opacity: .55; }
.board .s { opacity: .9; }
.board .f0 { fill: var(--w0); } .board .f1 { fill: var(--w1); } .board .f2 { fill: var(--w2); } .board .f3 { fill: var(--w3); } .board .f4 { fill: var(--w4); }
.board .f5 { fill: var(--w5); } .board .f6 { fill: var(--w6); } .board .f7 { fill: var(--w7); } .board .f8 { fill: var(--w8); } .board .f9 { fill: var(--w9); }
.board .t.f0, .board .t.f1, .board .t.f2, .board .t.f3, .board .t.f4, .board .t.f5, .board .t.f6, .board .t.f7, .board .t.f8, .board .t.f9 { fill-opacity: .22; stroke: none; }
.board .k0 { stroke: var(--w0); } .board .k1 { stroke: var(--w1); } .board .k2 { stroke: var(--w2); } .board .k3 { stroke: var(--w3); } .board .k4 { stroke: var(--w4); }
.board .k5 { stroke: var(--w5); } .board .k6 { stroke: var(--w6); } .board .k7 { stroke: var(--w7); } .board .k8 { stroke: var(--w8); } .board .k9 { stroke: var(--w9); }
.board-note { text-align: center; font-size: .85rem; color: var(--muted); margin-top: 6px; }

/* Hints */
details.hint { border: 1px solid var(--line); border-radius: 12px; background: var(--surface); margin-bottom: 8px; }
details.hint > summary { cursor: pointer; padding: 10px 14px; font-weight: 600; list-style: none; }
details.hint > summary::-webkit-details-marker { display: none; }
details.hint > summary::before { content: "+"; display: inline-block; width: 1.2em; color: var(--accent); font-weight: 800; }
details.hint[open] > summary::before { content: "–"; }
details.hint .body { padding: 0 14px 12px 34px; }
.pattern { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .25em; font-size: 1.05rem; }
details.reveal summary { cursor: pointer; color: var(--accent); font-weight: 600; margin-top: 6px; }
details.reveal b { letter-spacing: .08em; }

/* Quote */
blockquote.quote { margin: 0 0 12px; font-family: ui-serif, Georgia, serif; font-size: 1.35rem; line-height: 1.45; }
blockquote.quote mark { background: var(--accent-soft); color: var(--accent); padding: 0 .15em; border-radius: 4px; font-weight: 700; }
.quote-by { color: var(--muted); }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--surface-2); font-weight: 700; }
tr:last-child td { border-bottom: 0; }
td.num { white-space: nowrap; font-weight: 700; }
td .ans { letter-spacing: .03em; }

.pager { display: flex; justify-content: space-between; gap: 10px; margin: 28px 0 8px; flex-wrap: wrap; }
.pager a { flex: 1 1 180px; }
.pager .next { text-align: right; }
.jump { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.jump input { width: 130px; font: inherit; padding: 9px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); }

.prose { max-width: 720px; }
.prose li { margin-bottom: .4rem; }
.notice { background: var(--accent-soft); border-radius: 12px; padding: 12px 16px; margin: 12px 0; }
.alt { margin-top: 12px; }

/* Calendar */
.months { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.month h3 { margin-top: 0; }
.cal { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; font-size: .85rem; text-align: center; }
.cal span { color: var(--muted); font-size: .75rem; }
.cal a { display: block; padding: 5px 0; border-radius: 8px; background: var(--surface-2); color: var(--ink); text-decoration: none; }
.cal a:hover, .cal a.today { background: var(--accent); color: var(--accent-ink); }

/* Search results */
#results { margin-top: 16px; display: grid; gap: 8px; }
#results .res { display: block; padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); text-decoration: none; color: var(--ink); }
#results .res:hover { border-color: var(--accent); }
#results .res b { color: var(--accent); }
#results .res .ws { font-size: .9rem; color: var(--muted); letter-spacing: .03em; }
#results mark { background: var(--accent-soft); color: inherit; font-weight: 700; }

/* Footer */
.site-footer { background: var(--surface); border-top: 1px solid var(--line); padding: 32px 0; font-size: .92rem; }
.site-footer .cols { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.site-footer h2 { font-size: 1rem; margin: 0 0 8px; font-family: inherit; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin: 3px 0; }
.site-footer .ranges { display: flex; flex-wrap: wrap; gap: 4px 10px; }
.disclaimer { margin-top: 24px; color: var(--muted); font-size: .85rem; }
.cal b.future { display: block; padding: 5px 0; border-radius: 8px; color: var(--muted); font-weight: 400; opacity: .5; }