:root{
  --bg:#E9EEF1; --ink:#1F2830; --muted:#61707C;
  --rock:#5E6E7C; --rock2:#7C8C99; --snow:#FFFFFF; --flag:#D9472B;
  --board:#2F4858; --board-edge:#1F3240;
  --tile:#F1DEB4; --tile-edge:#C9A96E; --tile-ink:#2A2118;
  --sel:#D9472B; --good:#2F8F4E; --bad:#C2412F; --panel:#F8FAFB;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#121820; --ink:#E8EEF2; --muted:#93A2AE;
    --rock:#3E4C58; --rock2:#53636F; --snow:#DCE6EC; --flag:#F06A4B;
    --board:#24394A; --board-edge:#172734;
    --tile:#E6D0A0; --tile-edge:#B08F55; --tile-ink:#231B12;
    --sel:#E8603F; --good:#56B873; --bad:#E06A55; --panel:#1B232C;
  }
}
:root{box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
*,*::before,*::after{box-sizing:inherit}
html,body{margin:0;min-height:100%}
body{background:var(--bg);color:var(--ink);font-family:Figtree,system-ui,-apple-system,"Segoe UI",sans-serif;
  -webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;overscroll-behavior:none}
.app{max-width:480px;margin:0 auto;padding:12px 14px 18px;display:flex;flex-direction:column;gap:10px}
header.top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.brand{display:flex;align-items:center;gap:8px;font-family:"Zilla Slab",Georgia,serif;font-weight:700;font-size:1.7rem;color:var(--ink);text-decoration:none;letter-spacing:-.01em}
.brand svg{width:34px;height:21px;color:var(--board)}
.peakline h1{font-family:"Zilla Slab",Georgia,serif;font-size:1.35rem;margin:0;line-height:1.15}
body.practice .peakline .sub{color:var(--flag);font-weight:600}
.sub{color:var(--muted);font-size:.85rem;margin-top:3px}
.hbtns{display:flex;gap:6px;flex-shrink:0}
button{font:inherit;font-weight:800;font-size:1rem;border:0;border-radius:10px;padding:12px 20px;margin-top:14px;
  background:var(--board);color:#fff;cursor:pointer;box-shadow:inset 0 -3px 0 var(--board-edge)}
button.alt2,button.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--muted) 45%,transparent)}
button.ghost{padding:7px 12px;margin:0;font-size:.85rem}
button.icon{padding:6px 9px;font-size:1rem;line-height:1}
button:focus-visible{outline:3px solid var(--sel);outline-offset:2px}
button:disabled{opacity:.45;cursor:default}
.mtn{position:relative;height:96px}
.mtn svg{width:100%;height:100%;display:block;overflow:visible}
.alt{position:absolute;left:0;top:0;line-height:1.1}
.alt b{font-family:"Zilla Slab",Georgia,serif;font-size:1.6rem}
.alt span{display:block;color:var(--muted);font-size:.8rem}
.stats{display:flex;gap:6px}
.stat{flex:1;background:var(--panel);border-radius:10px;padding:6px 6px;text-align:center}
.stat b{display:block;font-size:1.1rem;font-weight:800;line-height:1.1;white-space:nowrap}
.stat span{font-size:.72rem;color:var(--muted)}
.word{height:40px;display:flex;align-items:center;justify-content:center;gap:10px;
  font-family:"Zilla Slab",Georgia,serif;font-size:1.6rem;font-weight:700;letter-spacing:.06em}
.word .pts{font-family:Figtree,sans-serif;font-size:.95rem;font-weight:600;letter-spacing:0;color:var(--muted)}
.word.valid{color:var(--good)} .word.invalid{color:var(--bad)}
.word .hint{font-family:Figtree,sans-serif;font-size:.95rem;font-weight:400;letter-spacing:0;color:var(--muted)}
.shake{animation:shake .35s}
@keyframes shake{20%,60%{transform:translateX(-6px)}40%,80%{transform:translateX(6px)}}
.boardwrap{background:var(--board);border-radius:14px;padding:8px;box-shadow:inset 0 -4px 0 var(--board-edge)}
#board{position:relative;width:100%;aspect-ratio:1;overflow:hidden;touch-action:none}
.tile{position:absolute;left:0;top:0;border-radius:12px;background:var(--tile);color:var(--tile-ink);
  box-shadow:inset 0 -3px 0 var(--tile-edge);display:flex;align-items:center;justify-content:center;
  font-family:"Zilla Slab",Georgia,serif;font-weight:700;transition:transform .32s cubic-bezier(.3,1.3,.6,1),opacity .2s,background .1s}
.tile .v{position:absolute;right:12%;bottom:10%;font-family:Figtree,sans-serif;font-weight:600;font-size:.32em}
.tile.on{background:var(--sel);color:#fff;box-shadow:inset 0 -3px 0 color-mix(in srgb,var(--sel) 60%,#000)}
.tile.gone{opacity:0}
svg#line{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:5}
.log{font-size:.9rem;color:var(--muted);min-height:1.3em;text-align:center}
.log b{color:var(--ink)}
.btns{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.app>.btns{margin-top:-8px}
.overlay{position:fixed;inset:0;background:color-mix(in srgb,var(--bg) 70%,transparent);backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px);
  display:none;align-items:center;justify-content:center;z-index:20;padding:20px}
.overlay.show{display:flex}
.card{background:var(--panel);border-radius:16px;padding:22px;max-width:380px;width:100%;text-align:center;box-shadow:0 10px 30px rgba(0,0,0,.2);max-height:90vh;overflow:auto}
.card h2{font-family:"Zilla Slab",Georgia,serif;font-size:1.8rem;margin:0 0 8px}
.card p{margin:6px 0;color:var(--muted);line-height:1.45}
.card p b{color:var(--ink)}
.card a{color:var(--ink)}
.howto{text-align:left;padding-left:1.2em;color:var(--muted);line-height:1.5;margin:8px 0}
.howto b{color:var(--ink)}
.peaks{list-style:none;padding:0;margin:10px 0 0;text-align:left}
.peaks li button{width:100%;margin:4px 0;display:flex;justify-content:space-between;align-items:center;padding:10px 12px;font-size:.95rem}
.peaks li button small{font-weight:600;opacity:.75}
.menu button{width:100%;margin:6px 0 0}
.field{font:700 1.3rem "Zilla Slab",Georgia,serif;letter-spacing:.04em;text-align:center;width:100%;margin-top:10px;
  padding:10px;border-radius:10px;border:2px solid color-mix(in srgb,var(--muted) 45%,transparent);background:var(--bg);color:var(--ink);-webkit-user-select:text;user-select:text}
.field.upper{text-transform:uppercase}
.lbwrap{margin-top:14px;text-align:left}
.lbhead{font-weight:800;font-size:.85rem;color:var(--muted);margin-bottom:6px}
.lb{list-style:none;margin:0;padding:0}
.lb li{display:flex;gap:8px;align-items:baseline;padding:7px 8px;border-radius:8px;font-size:.92rem}
.lb li:nth-child(odd){background:color-mix(in srgb,var(--muted) 10%,transparent)}
.lb li.me{background:color-mix(in srgb,var(--flag) 18%,transparent)}
.lb .rk{font-weight:800;min-width:1.4em}
.lb .nm{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lb .sc{color:var(--muted);font-weight:600;white-space:nowrap}
.lb .lbnote{background:none!important;color:var(--muted);justify-content:center;text-align:center}
.statgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin:12px 0}
.statgrid div{display:flex;flex-direction:column}
.statgrid b{font-size:1.6rem;font-weight:800}
.statgrid span{font-size:.75rem;color:var(--muted)}
.namebox{margin-top:12px}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translateX(-50%) translateY(20px);opacity:0;
  background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;font-weight:600;transition:all .25s;z-index:30;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
@media (prefers-reduced-motion:reduce){.tile{transition:opacity .2s}.shake{animation:none}}

/* overlays: extra pieces */
.small{font-size:.82rem;color:var(--muted)}
.card h3{font-family:"Zilla Slab",Georgia,serif;margin:18px 0 2px;text-align:left}
.seg{display:flex;background:color-mix(in srgb,var(--muted) 15%,transparent);border-radius:10px;padding:3px;margin:4px 0 10px}
.seg button{flex:1;margin:0;padding:8px;background:transparent;color:var(--ink);box-shadow:none;font-size:.9rem}
.seg button.on{background:var(--panel);box-shadow:0 1px 3px rgba(0,0,0,.15)}
.datenav{display:flex;align-items:center;justify-content:space-between;gap:8px;font-weight:700;font-size:.92rem}
.datenav button{padding:4px 12px;font-size:1.2rem}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin:10px 0 2px;justify-content:center}
.chips button{margin:0;padding:6px 12px;font-size:.82rem;background:transparent;color:var(--ink);box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--muted) 35%,transparent)}
.chips button.on{background:var(--board);color:#fff;box-shadow:none}
.lb li.tap{cursor:pointer}
.lb li.tap:hover{outline:2px solid color-mix(in srgb,var(--muted) 30%,transparent)}
.lb li .xbtn{padding:0 9px;font-size:1rem;margin-left:4px;align-self:center}
.flist{margin-top:10px}
.codebox{display:flex;align-items:center;justify-content:center;gap:10px;margin:6px 0 12px}
.codebox b{font-family:"Zilla Slab",Georgia,serif;font-size:1.6rem;letter-spacing:.12em}
.addrow{display:flex;gap:8px;align-items:center;margin-top:8px}
.addrow .field{margin:0;font-size:1.05rem;padding:9px}
.addrow button{margin:0;padding:11px 16px}
.field.mono{font:600 .85rem ui-monospace,Menlo,Consolas,monospace;letter-spacing:0}
.rgrid{display:grid;grid-template-columns:repeat(5,1fr);gap:5px;background:var(--board);padding:6px;border-radius:12px;margin:12px auto 8px;max-width:280px}
.rcell{position:relative;aspect-ratio:1;border-radius:8px;background:var(--tile);color:var(--tile-ink);box-shadow:inset 0 -2px 0 var(--tile-edge);
  display:flex;align-items:center;justify-content:center;font:700 1.5rem "Zilla Slab",Georgia,serif;transition:background .15s}
.rcell .v{position:absolute;right:10%;bottom:6%;font:600 .55rem Figtree,sans-serif}
.rcell.on{background:var(--sel);color:#fff}
.rcell.empty{background:transparent;box-shadow:none}
.rword{font:700 1.35rem "Zilla Slab",Georgia,serif;letter-spacing:.05em;min-height:1.6em}
.rword .pts{font:600 .9rem Figtree,sans-serif;color:var(--muted);letter-spacing:0}
.links{font-size:.88rem}
.card .links a{color:var(--muted)}
/* content pages and landing */
.page{max-width:680px;margin:0 auto;padding:28px 18px 10px;line-height:1.6}
.page h1{font-family:"Zilla Slab",Georgia,serif;font-size:2rem;margin:.2em 0 .4em;line-height:1.15}
.page h2{font-family:"Zilla Slab",Georgia,serif;font-size:1.4rem;margin:1.6em 0 .3em;line-height:1.2}
.page h3{font-family:"Zilla Slab",Georgia,serif;font-size:1.1rem;margin:1.2em 0 .2em}
.page p,.page li{color:var(--ink)}
.page a{color:var(--board);font-weight:600}
@media (prefers-color-scheme: dark){.page a{color:var(--tile)}}
.page ol,.page ul{padding-left:1.3em}
.page li{margin:.3em 0}
.crumb{font-size:.88rem;color:var(--muted)}
.crumb a{color:var(--muted)}
.landing{border-top:1px solid color-mix(in srgb,var(--muted) 25%,transparent);margin-top:18px}
.peaklist{list-style:none;padding:0!important;display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:6px}
.peaklist li{background:var(--panel);border-radius:10px;padding:8px 12px;margin:0;display:flex;flex-direction:column}
.peaklist small{color:var(--muted)}
.cta{display:inline-block;background:var(--board);color:#fff!important;text-decoration:none;padding:11px 20px;border-radius:10px;font-weight:800;box-shadow:inset 0 -3px 0 var(--board-edge);margin-top:10px}
.changelog li{margin:.6em 0}
.changelog time{font-weight:700;color:var(--muted);margin-right:6px}
.foot{max-width:680px;margin:20px auto 0;padding:18px;border-top:1px solid color-mix(in srgb,var(--muted) 25%,transparent);font-size:.85rem;color:var(--muted);text-align:center}
.foot nav{display:flex;flex-wrap:wrap;gap:6px 14px;justify-content:center;margin-bottom:8px}
.foot a{color:var(--muted)}
.sitehead{max-width:680px;margin:0 auto;padding:14px 18px 0;display:flex;justify-content:space-between;align-items:center}
.page,.doc{-webkit-user-select:text;user-select:text}
.lb .nm{min-width:34%}.lb .sc{white-space:normal;text-align:right}
.lb li{text-align:left}