:root{color-scheme:light;--ink:#172b2a;--accent:#12675e;--paper:#f6f5ef;--line:#d7dfd9}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.55 system-ui,sans-serif}a{color:var(--accent);text-underline-offset:4px}button,input,select{font:inherit}button{min-height:46px;border-radius:10px;border:1px solid var(--line);padding:10px 18px;background:white;color:var(--ink);cursor:pointer}button:hover{border-color:var(--accent)}button:disabled{opacity:.5;cursor:default}button.primary,button[aria-pressed=true]{background:var(--accent);color:white;border-color:var(--accent)}:focus-visible{outline:3px solid #d18318;outline-offset:4px}header,main,footer{max-width:1040px;margin:auto;padding:var(--handy-dimension-x6,24px)}header{display:flex;justify-content:space-between;gap:20px;align-items:center}header nav{display:flex;gap:20px}.brand{font-weight:800;text-decoration:none;font-size:22px}.brand span{font-weight:400;font-size:14px}h1{font-size:clamp(30px,5vw,48px);letter-spacing:-1.5px;line-height:1.15;margin:10px 0 16px}h2{line-height:1.3}h3{text-transform:capitalize}.eyebrow{font-size:12px;font-weight:750;letter-spacing:2px;color:var(--accent)}.lede{max-width:720px;color:#4b6260}.surface{background:white;border:1px solid var(--line);border-radius:20px;padding:28px;box-shadow:0 8px 40px #18382b07}.modes,.actions{display:flex;gap:10px;flex-wrap:wrap}.modes{margin:24px 0}.cards{display:flex;gap:14px;max-width:630px;margin:24px 0}.card{flex:1;aspect-ratio:.71;border-radius:12px;box-shadow:0 3px 0 #d9dfd9;border:1px solid #cbd6d0;background:#fbfcf9;display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:0}.card:last-child{margin-left:16px;border-color:var(--accent);background:#edf7f2}.card strong{font-size:clamp(22px,4vw,40px);font-weight:700}.card small{font-size:10px;letter-spacing:1px;color:#536966}.red strong{color:#b13a39}.grid{display:grid;grid-template-columns:repeat(5,1fr);gap:var(--handy-dimension-x3,12px);margin:24px 0}.grid label{display:flex;flex-direction:column;gap:7px;font-size:14px;font-weight:650;text-transform:capitalize}.grid input,.grid select{width:100%;min-width:0;border:1px solid #9bafaa;border-radius:8px;min-height:var(--handy-dimension-control-lg,48px);padding:8px;background:white;color:var(--ink)}.feedback{font-weight:650;min-height:26px;margin-top:22px}.breakdown{border-top:1px solid var(--line);margin-top:24px;padding-top:12px}.breakdown p{font-weight:700;margin-bottom:4px}.combo{font-family:ui-monospace,monospace;font-size:14px;color:#4b6260;margin:4px 0}.guide{margin:40px 0}.guide p,.guide li{max-width:800px}.notes{background:#e9efea;border-radius:12px;padding:20px;margin:24px 0}.fine{font-size:14px;color:#526662}footer{border-top:1px solid var(--line);display:flex;gap:20px;flex-wrap:wrap;font-size:14px}.skip{position:absolute;left:16px;top:-100px;background:white;padding:12px}.skip:focus{top:12px}[hidden]{display:none!important}@media(max-width:600px){header,main,footer{padding:18px}header{align-items:flex-start}.brand span{display:block}header nav{gap:var(--handy-dimension-x3,12px);font-size:14px}.surface{padding:18px}.cards{gap:7px}.card:last-child{margin-left:5px}.card small{font-size:8px;letter-spacing:0}.grid{grid-template-columns:repeat(2,1fr)}.grid label:last-child{grid-column:span 2}.modes button{flex:1;padding:10px 8px;font-size:14px}h1{letter-spacing:-.8px}}
/* Puzzle-specific layout: keep the board and its controls together. */
.tool-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:20px}
.puzzle-hero h1{margin-bottom:10px}.puzzle-hero .lede{margin:0}.puzzle-hero .eyebrow{margin-top:0}
.puzzle-layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(220px,1fr);gap:32px}.puzzle-play{min-width:0}.puzzle-play>.eyebrow{margin:0 0 8px}.puzzle-values{font-size:14px;color:#4b6260;margin:0}
.trio-board{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:18px 0}.trio-card{position:relative;display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:110px;padding:10px 8px;border:2px solid var(--line);box-shadow:0 3px 0 #d9dfd9}.trio-card strong{font-size:32px;white-space:nowrap}.trio-card small{font-size:13px}.trio-card.red strong{color:#b13a39}.trio-card[aria-pressed=true]{background:#e6f5ef;color:var(--ink);border-color:var(--accent);outline:2px solid var(--accent)}.trio-card[aria-pressed=true]::after{content:'✓';position:absolute;top:3px;right:7px;font-size:14px;font-weight:800;color:var(--accent)}
.puzzle-play .actions{display:grid;grid-template-columns:minmax(0,1fr) auto}.puzzle-play .feedback{font-size:15px;margin:14px 0 0;min-height:46px}
.puzzle-summary{border-left:1px solid var(--line);padding-left:28px}.puzzle-progress{margin:0 0 24px;line-height:1.6}.puzzle-summary h2{font-size:20px;margin:0 0 12px}.puzzle-empty{font-size:15px;color:#526662;margin:0}#trios-found{padding-left:20px;font-size:15px}#trios-found li{margin:10px 0}#trios-complete{padding:16px;background:#e6f5ef;border-radius:12px;font-size:15px}
body[data-page=trios] .notes{display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:14px}body[data-page=trios] .notes p{margin:0}body[data-page=trios] .notes button{font-size:14px;flex-shrink:0}
@media(max-width:700px){.puzzle-layout{display:block}.puzzle-summary{border-left:0;border-top:1px solid var(--line);padding:18px 0 0;margin-top:18px}.puzzle-progress{margin-bottom:16px}.puzzle-surface{padding:16px}.trio-board{gap:8px;margin:14px 0}.trio-card{min-height:76px;padding:8px}.trio-card strong{font-size:clamp(22px,6vw,28px)}.puzzle-play .feedback{min-height:24px}body[data-page=trios] main{padding-top:10px}.puzzle-hero h1{font-size:32px;margin:4px 0 8px}.puzzle-hero .lede{font-size:16px;max-width:320px}body[data-page=trios] .modes{margin:16px 0}.puzzle-values{font-size:13px}body[data-page=trios] .notes{display:block}body[data-page=trios] .notes button{margin-top:12px}}