/* System fonts and local artwork: no external runtime requests. */
:root{font-family:ui-rounded,'Trebuchet MS',system-ui,sans-serif;color:#244f43;background:#faf9f3;font-synthesis:none;--green:#244f43;--muted:#63776e;--line:#dde3d7;--yellow:#f8ce53}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button,a,input,textarea,select{touch-action:manipulation}button,.button{cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:12px;border:1px solid var(--green);border-radius:12px;padding:13px 20px;font-weight:700;color:var(--green);background:transparent}button:hover,.button:hover{background:#e9eedf}button.primary,.button.primary{background:var(--green);color:white}button.primary:hover,.button.primary:hover{background:#326b59}button:disabled{opacity:.55;cursor:default}:focus-visible{outline:3px solid #b76b27;outline-offset:4px}.header{max-width:1280px;margin:auto;padding:26px 48px;display:flex;align-items:center;gap:60px}.brand{display:flex;align-items:center;gap:9px;font-size:27px;font-weight:900;letter-spacing:-1.2px}.brand span{font-weight:400;margin-left:-9px}.header nav{display:flex;gap:30px;font-size:14px;font-weight:700}.header nav a{padding:10px 0}.header nav a[aria-current=page]{border-bottom:2px solid var(--green)}#nav-count{display:inline-grid;place-items:center;background:#e8eddf;border-radius:50%;min-width:24px;height:24px;margin-left:4px}.header-note{margin-left:auto;color:var(--muted);font-size:12px}main{max-width:1184px;margin:16px auto 80px;padding:0 0;min-height:65vh}.hero{display:grid;grid-template-columns:1.05fr 1fr;background:#eaf0df;border:1px solid #dfe7d3;border-radius:26px;overflow:hidden;min-height:385px}.hero-copy{padding:46px 0 40px 44px;z-index:1}.eyebrow{font-size:11px;letter-spacing:2px;font-weight:800;text-transform:uppercase;display:flex;align-items:center;gap:8px}.eyebrow:before{content:'';width:7px;height:7px;border-radius:50%;background:#76a37b}h1{font-size:clamp(38px,4.4vw,61px);line-height:1.06;letter-spacing:-2.5px;margin:20px 0;font-weight:800}h1 em{font-family:Georgia,serif;font-weight:400}p{line-height:1.65}.hero-copy p{max-width:370px;font-size:15px;color:#536b5d}.hero-actions{display:flex;align-items:center;gap:20px;margin-top:26px}.quiet{font-size:12px;color:var(--muted)}.pond{width:100%;height:100%;min-height:330px}.strip{display:flex;justify-content:space-between;gap:25px;padding:24px 4px;border-bottom:1px solid var(--line);font-size:13px}.strip span{display:flex;gap:10px;align-items:center}.strip b{font-size:18px}.section-heading{display:flex;align-items:end;justify-content:space-between;margin:38px 0 22px}.section-heading h2{font-size:28px;letter-spacing:-.8px;margin:0 0 7px}.section-heading p{font-size:13px;color:var(--muted);margin:0}.label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:22px 0}.filters{display:flex;flex-wrap:wrap;gap:7px}.filter{border:1px solid var(--line);border-radius:30px;padding:9px 17px;font-size:12px;background:white}.filter[aria-pressed=true]{background:var(--green);color:white}.search{border:1px solid var(--line);background:#fff;padding:10px 15px;border-radius:10px;width:220px;color:var(--green)}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.card{background:white;border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:transform .2s}.card:hover{transform:translateY(-4px)}.card-art{height:150px;display:grid;place-items:center;position:relative;background:#edf1e7}.card:nth-child(2) .card-art{background:#e5edf3}.card:nth-child(3) .card-art{background:#f5e9d9}.card-art svg{width:90%;height:125px}.number{position:absolute;top:16px;left:18px;font:12px monospace;color:#60776b}.card-body{padding:22px}.tags{display:flex;justify-content:space-between;font-size:11px;color:var(--muted)}.tag{background:#eef2e8;padding:4px 8px;border-radius:5px}.card h3{font-size:22px;margin:16px 0 9px;letter-spacing:-.5px}.card p{font-size:13px;color:var(--muted);margin:0;min-height:44px}.card-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);margin-top:20px;padding-top:17px;font-size:12px;font-weight:700}.arrow{font-size:22px}.coming{margin-top:28px;border:1px dashed #becbb4;border-radius:15px;padding:22px;display:flex;align-items:center;gap:18px}.coming p{margin:3px 0;font-size:13px;color:var(--muted)}.coming strong{font-size:14px}.coming img{width:40px}.coming .label{margin-left:auto;white-space:nowrap}footer{max-width:1184px;border-top:1px solid var(--line);margin:auto;padding:25px 0 32px;display:flex;align-items:center;gap:28px;font-size:12px;color:var(--muted)}footer .small{font-size:20px}footer span{margin-left:auto}.skip{position:absolute;left:15px;top:-100px;background:white;padding:12px;z-index:10}.skip:focus{top:10px}.notice{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);max-width:90%;background:var(--green);color:white;padding:14px 24px;border-radius:12px;box-shadow:0 5px 30px #0002;z-index:20}.back{display:inline-block;margin:15px 0 25px;font-size:14px}.play-layout{display:grid;grid-template-columns:1.6fr 1fr;gap:25px}.panel{background:white;border:1px solid var(--line);border-radius:20px;padding:32px}.puzzle-title{font-size:40px;letter-spacing:-1.4px}.prompt{font-size:20px;line-height:1.7}.play-art{height:150px;background:#edf1e7;border-radius:14px;display:grid;place-items:center}.play-art svg{height:140px;width:100%}.answer-row{display:flex;gap:12px;margin:12px 0}.answer-row input{min-width:0;width:100%;border:1px solid #9aac9d;border-radius:10px;padding:12px}.field-label{display:block;font-weight:700;font-size:14px;margin:25px 0 10px}.feedback{border-radius:10px;background:#edf1e7;padding:15px;line-height:1.6}.feedback:empty{display:none}.hints{padding:0;list-style:none}.hints li{background:#fff5d4;padding:14px;border-radius:10px;margin:10px 0;line-height:1.6;font-size:14px}.notes{width:100%;resize:vertical;min-height:190px;border:1px solid var(--line);border-radius:10px;padding:14px;line-height:1.6;color:var(--green)}.panel h2{margin-top:0}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:25px 0}.stat{background:#eaf0df;border-radius:18px;padding:25px}.stat strong{font-size:40px;display:block}.progress-row{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding:20px 0;gap:20px}.backup-actions{display:flex;flex-wrap:wrap;gap:12px;margin:20px 0}.empty{padding:40px;border:1px dashed var(--line);border-radius:18px;grid-column:1/-1}.progress-track{height:8px;background:#e1e7d9;border-radius:8px;overflow:hidden}.progress-fill{height:100%;background:#659478}.status-copy{font-size:13px;color:var(--muted)}dialog{border:1px solid var(--line);border-radius:20px;max-width:480px;padding:30px;color:var(--green)}dialog::backdrop{background:#153b3280}
@media(max-width:900px){.header{padding:20px 25px;gap:25px}.header-note{display:none}main,footer{margin-left:25px;margin-right:25px}.hero-copy{padding:30px}.hero{grid-template-columns:1.2fr 1fr}.cards{gap:12px}.card-body{padding:16px}.play-layout{grid-template-columns:1fr}.strip{font-size:11px;gap:10px}footer{flex-wrap:wrap}}@media(max-width:620px){.header{padding:18px;flex-wrap:wrap;gap:14px;justify-content:space-between}.brand{font-size:24px}.brand img{width:35px;height:35px}.header nav{font-size:12px;gap:17px}main{margin:8px 18px 45px}.hero{grid-template-columns:1fr}.hero-copy{padding:30px 26px 0}h1{font-size:45px}.pond{min-height:230px;height:240px}.hero-actions{gap:12px}.strip{flex-wrap:wrap;justify-content:center;padding:20px 0}.cards{grid-template-columns:1fr}.card-art{height:165px}.card p{min-height:0}.toolbar{align-items:stretch;flex-direction:column}.search{width:100%}.section-heading{gap:12px}.section-heading .quiet{display:none}.coming{align-items:start}.coming .label{display:none}footer{margin:0 18px;gap:10px}footer p{margin-left:auto}footer span{margin:0}.panel{padding:22px}.puzzle-title{font-size:34px}.answer-row{flex-direction:column}.stats{gap:8px}.stat{padding:15px;font-size:12px}.stat strong{font-size:30px}.progress-row{align-items:start}.hero-copy p{font-size:14px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.backup-panel{margin-top:24px}

/* Interactive puzzle boards: native buttons support touch and keyboards. */
.board-layout { grid-template-columns: minmax(0, 1.8fr) minmax(270px, 1fr); }
.board-layout > *, .board-layout .panel { min-width: 0; }
.board-layout .prompt { font-size: 17px; }
.board-banner { display: flex; align-items: center; gap: 14px; margin: 12px 0 22px; line-height: 1.6; font-size: 14px; }
.character { width: 48px; height: 48px; flex-shrink: 0; }
.interactive-board { border: 1px solid #c8d9cd; border-radius: 18px; background: #eff5ec; padding: 20px; }
.board-instruction { font-size: 14px; line-height: 1.6; margin: 16px 0; }
.board-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.board-actions button { min-height: 44px; font-size: 13px; padding: 11px 14px; }
.board-feedback { line-height: 1.6; font-size: 15px; margin: 18px 0; }
.board-feedback:empty { display: none; }
.board-success { background: #fff4cc; border: 1px solid #dfc76d; padding: 24px; border-radius: 16px; margin-top: 22px; }
.board-success h2 { font-size: 24px; margin: 0; }
.board-success p { font-size: 15px; }
.attribution { border-top: 1px solid var(--line); padding-top: 14px; }
.even-board { max-width: 400px; margin: auto; }
.pad-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)) 40px; gap: 7px; margin-bottom: 7px; align-items: center; }
.pad { min-height: 44px; aspect-ratio: 1; width: 100%; padding: 2px; border: 1px solid #97bcb4; background: #d4e8e1; border-radius: 12px; }
.pad:hover { background: #c3dfd4; }
.pad > span { width: 100%; display: flex; justify-content: center; font-size: 22px; }
.lily-leaf { display: block; width: 78%; aspect-ratio: 1.15; background: #5a865b; border-radius: 50%; clip-path: polygon(0 0, 100% 0, 100% 43%, 53% 58%, 100% 75%, 100% 100%, 0 100%); box-shadow: inset 0 -5px 0 #3c704b; }
.count { text-align: center; font-weight: 800; color: #244f43; font-size: 18px; line-height: 1.2; }
.count small { font-weight: 400; font-size: 11px; display: block; }
.count.odd { color: #8c402b; }
.column-counts { margin-top: 14px; }
.stone-tray { display: flex; flex-wrap: wrap; gap: 8px; }
.stone-choice { min-width: 44px; min-height: 44px; padding: 8px 12px; background: #fff8df; }
.stone-choice[aria-pressed=true] { background: #244f43; color: white; box-shadow: 0 0 0 2px #244f43; }
.triangle-board { position: relative; width: 100%; max-width: 410px; aspect-ratio: 1; margin: auto; }
.triangle-board > svg { position: absolute; width: 100%; height: 100%; }
.triangle-slot { position: absolute; transform: translate(-50%, -50%); width: 48px; height: 48px; padding: 0; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: #fffaf0; font-size: 22px; border: 2px solid #527c5d; }
.triangle-slot.fixed { flex-direction: column; background: #f7d76d; border-color: #9b7d2a; font-size: 20px; }
.triangle-slot small { font-size: 10px; }
.slot-0 { left: 50%; top: 10%; }
.slot-1 { left: 36.3%; top: 36%; }
.slot-2 { left: 22.7%; top: 62%; }
.slot-3 { left: 9%; top: 88%; }
.slot-4 { left: 36.3%; top: 88%; }
.slot-5 { left: 63.7%; top: 88%; }
.slot-6 { left: 91%; top: 88%; }
.slot-7 { left: 77.3%; top: 62%; }
.slot-8 { left: 63.7%; top: 36%; }
.side-sums { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.side-total { border: 1px solid #becdbd; border-radius: 8px; background: #fff; text-align: center; padding: 10px 4px; font-size: 12px; }
.side-total strong { display: block; margin-top: 4px; font-size: 18px; }
.side-total.ready { background: #d8e8cf; border: 2px solid #547c53; }
.river-scene { display: grid; grid-template-columns: minmax(0, 1fr) 36px minmax(0, 1fr); min-height: 210px; }
.river-bank { background: #d8e7c9; border-radius: 18px; padding: 10px; }
.river-bank h3 { text-align: center; margin: 5px 0 15px; font-size: 14px; }
.bank-residents { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; }
.resident { display: flex; align-items: center; flex-direction: column; font-size: 12px; font-weight: 700; }
.river-water { display: flex; flex-direction: column; justify-content: space-evenly; text-align: center; background: #c9e2df; color: #467a77; font-size: 25px; margin: 0 3px; border-radius: 14px; }
.passengers { border: 0; padding: 0; margin: 18px 0; display: flex; flex-wrap: wrap; gap: 8px; }
.passengers legend { font-weight: 700; font-size: 14px; margin-bottom: 10px; }
.passenger { display: flex; align-items: center; gap: 7px; padding: 10px; min-height: 44px; background: #fff; border: 1px solid #97ac95; border-radius: 10px; font-size: 14px; cursor: pointer; }
.passenger:has(input:checked) { background: #fff1bb; border-color: #8c6c20; }
.passenger input { accent-color: #244f43; width: 18px; height: 18px; }
.mini-pond { width: 180px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; position: relative; }
.mini-pond > span { height: 25px; background: #8eaf88; border-radius: 50%; }
.mini-pond img { position: absolute; right: -36px; bottom: -8px; width: 48px; transform: rotate(8deg); }
.river-card { display: flex; gap: 28px; align-items: center; }
.mini-boat { border-bottom: 14px solid #ad885c; border-radius: 0 0 50% 50%; padding: 6px; }
@media(max-width:900px) { .board-layout { grid-template-columns: minmax(0,1fr); } }
@media(max-width:480px) {
  .board-layout .panel { padding: 16px; }
  .interactive-board { padding: 12px; }
  .pad-row { gap: 3px; grid-template-columns: repeat(4,minmax(0,1fr)) 27px; }
  .triangle-slot { width: 44px; height: 44px; }
  .river-bank { padding: 7px; }
  .board-actions { gap: 7px; }
  .board-banner { gap: 10px; }
}
.ferry-art { display: block; border-bottom: 10px solid #977345; border-radius: 0 0 50% 50%; padding: 0 3px; margin-bottom: 3px; }
.ferryman > span:last-child { font-size: 11px; }