/* Block Nook — tokens first. Everything else is built from these. */
@font-face{font-family:"Poppins";font-weight:400;font-style:normal;font-display:swap;src:url("/fonts/poppins-400.woff") format("woff")}
@font-face{font-family:"Poppins";font-weight:500;font-style:normal;font-display:swap;src:url("/fonts/poppins-500.woff") format("woff")}
@font-face{font-family:"Poppins";font-weight:700;font-style:normal;font-display:swap;src:url("/fonts/poppins-700.woff") format("woff")}
@font-face{font-family:"Lora";font-weight:400 700;font-style:normal;font-display:swap;src:url("/fonts/lora-var.woff") format("woff")}

:root{
  --ink:#1f2347;
  --ink-soft:#4b4f7a;
  --paper:#f1effb;
  --card:#ffffff;
  --line:#d9d5ee;
  --board:#d8d3ef;
  --cell:#e9e6f8;
  --accent:#4348d0;
  --accent-ink:#ffffff;
  --accent-soft:#e1e2fb;
  --b0:#9fe3c4; --b1:#ffc3a0; --b2:#ffe08a; --b3:#9ccbff; --b4:#c3aef5; --b5:#ffafc5;
  --edge:rgba(31,35,71,.22);
  --r-s:6px; --r-m:14px;
  --font:"Poppins",ui-rounded,"Segoe UI",system-ui,-apple-system,sans-serif;
  --serif:"Lora",Georgia,"Times New Roman",serif;
}
@media (prefers-color-scheme:dark){
  :root{
    --ink:#ecebfa; --ink-soft:#aeb0d6; --paper:#14162b; --card:#1e2142; --line:#343868;
    --board:#2a2e5c; --cell:#1b1e3c; --accent:#8f94ff; --accent-ink:#14162b; --accent-soft:#2b2f66;
    --edge:rgba(0,0,0,.35);
  }
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 1rem/1.6 var(--font);min-height:100vh;display:flex;flex-direction:column}
main{flex:1}
img,svg{max-width:100%;display:block}
a{color:var(--accent);text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
h1,h2,h3{font-family:var(--font);font-weight:700;line-height:1.15;letter-spacing:-.015em;margin:0 0 .5em}
h1{font-size:clamp(2rem,5.2vw,3.35rem);letter-spacing:-.025em}
h2{font-size:clamp(1.35rem,2.6vw,1.75rem)}
h3{font-size:1.1rem}
p{margin:0 0 1em}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:var(--accent-ink);padding:8px 14px;border-radius:var(--r-s);z-index:50}
.skip:focus{left:8px}

.wrap{width:100%;max-width:1120px;margin-inline:auto;padding-inline:16px}

/* Header */
.site-header{padding-block:14px}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:700;font-size:1.15rem;letter-spacing:-.01em}
.brand svg{width:30px;height:30px}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{color:var(--ink);text-decoration:none;padding:6px 12px;border-radius:10px;font-weight:500;font-size:.95rem}
.nav a:hover{background:var(--accent-soft)}
.nav a[aria-current="page"]{background:var(--accent-soft);color:var(--accent)}

/* Blocks (used by the game, covers and the logo) */
.b{display:block;border-radius:var(--r-s);box-shadow:inset 0 -3px 0 var(--edge)}
.c0{background:var(--b0)} .c1{background:var(--b1)} .c2{background:var(--b2)}
.c3{background:var(--b3)} .c4{background:var(--b4)} .c5{background:var(--b5)}

/* Hero: the game is the first thing on the page */
.hero{padding-block:clamp(4px,1.5vw,16px) clamp(32px,6vw,64px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,460px);grid-template-areas:"intro game" "help game";column-gap:clamp(24px,5vw,64px);align-items:start}
.hero-intro{grid-area:intro;align-self:end;padding-bottom:20px}
.hero-help{grid-area:help;align-self:start}
.hero-grid>.game{grid-area:game;align-self:center}
.hero-intro h1{max-width:11ch}
.hero-intro .lede{font-size:1.1rem;color:var(--ink-soft);max-width:34ch;margin:0}
.hero-help ul{list-style:none;margin:0;padding:0;display:grid;gap:.6em;max-width:36ch}
.hero-help li{display:flex;gap:12px;align-items:baseline}
.hero-help li i{flex:none;width:14px;height:14px;border-radius:4px;transform:translateY(2px);box-shadow:inset 0 -2px 0 var(--edge)}
.hero-help .more{margin:1.2em 0 0}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:500 .95rem/1 var(--font);padding:12px 18px;border-radius:10px;border:2px solid var(--accent);background:var(--accent);color:var(--accent-ink);text-decoration:none;cursor:pointer}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--accent)}
.btn.ghost:hover{background:var(--accent-soft);filter:none}
.btn.big{padding:15px 26px;font-size:1.05rem}

/* Game */
.game{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r-m);padding:14px 14px 16px;width:100%;max-width:460px;margin-inline:auto;touch-action:manipulation}
.hud{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.hud dl{display:flex;gap:18px;margin:0}
.hud dt{font-size:.75rem;color:var(--ink-soft);line-height:1.2}
.hud dd{margin:0;font-weight:700;font-size:1.35rem;line-height:1.2;font-variant-numeric:tabular-nums}
.hud .btn{padding:9px 14px;font-size:.85rem}
.board{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:3px;padding:6px;background:var(--board);border-radius:var(--r-m);aspect-ratio:1;user-select:none;-webkit-user-select:none}
.cell{appearance:none;border:0;padding:0;margin:0;background:var(--cell);border-radius:var(--r-s);cursor:pointer;position:relative;min-width:0}
.cell.on{box-shadow:inset 0 -3px 0 var(--edge)}
.cell.on.c0{background:var(--b0)} .cell.on.c1{background:var(--b1)} .cell.on.c2{background:var(--b2)}
.cell.on.c3{background:var(--b3)} .cell.on.c4{background:var(--b4)} .cell.on.c5{background:var(--b5)}
.cell.pv{background:var(--pv);opacity:.62}
.cell.will::after{content:"";position:absolute;inset:0;border-radius:var(--r-s);border:2px solid var(--accent);pointer-events:none}
.cell.pop{animation:pop .22s ease-out forwards}
.cell.born{animation:born .32s cubic-bezier(.2,.9,.3,1.25) both;animation-delay:calc(var(--d,0) * 28ms)}
@keyframes pop{to{transform:scale(.4);opacity:0}}
@keyframes born{from{transform:scale(.2);opacity:0}to{transform:scale(1);opacity:1}}

.tray{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px;align-items:center}
.slot{display:flex;align-items:center;justify-content:center;min-height:calc(var(--pc,24px)*5)}
.piece{appearance:none;background:transparent;border:2px solid transparent;border-radius:var(--r-m);padding:8px;cursor:grab;display:grid;grid-template-columns:repeat(var(--w),var(--pc,24px));grid-template-rows:repeat(var(--h),var(--pc,24px));gap:3px;touch-action:none;user-select:none;-webkit-user-select:none}
.piece[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft)}
.piece.dragging{opacity:.35}
.drag-ghost{position:fixed;left:0;top:0;z-index:60;pointer-events:none;display:grid;gap:3px;will-change:transform}
.hint{margin:12px 2px 0;font-size:.85rem;color:var(--ink-soft)}
.over{position:absolute;inset:0;border-radius:var(--r-m);background:color-mix(in srgb,var(--card) 90%,transparent);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:6px;padding:24px;z-index:5}
.over[hidden]{display:none}
.over h2{margin:0}
.over p{margin:0 0 12px;color:var(--ink-soft)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* Sections */
.section{padding-block:clamp(28px,5vw,56px)}
.section.tint{background:var(--card);border-block:1px solid var(--line)}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:20px}
.section-head h2{margin:0}
.section-head a{font-weight:500;text-decoration:none}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 24px;padding:0;list-style:none}
.chips a{display:inline-block;padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--ink);text-decoration:none;font-size:.9rem;font-weight:500}
.chips a:hover,.chips a[aria-current="page"]{border-color:var(--accent);color:var(--accent)}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:16px;margin:0;padding:0;list-style:none}
.tile{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;color:var(--ink);text-decoration:none;height:100%}
.tile:hover,.tile:focus-visible{border-color:var(--accent)}
.tile .cover{aspect-ratio:4/3;background:var(--board);overflow:hidden}
.tile .cover img,.tile .cover svg{width:100%;height:100%;object-fit:cover}
.tile .body{padding:12px 14px 14px}
.tile h3{margin:0 0 4px}
.tile p{margin:0;font-size:.88rem;color:var(--ink-soft);line-height:1.45}
.tag{display:inline-block;font-size:.72rem;font-weight:700;padding:2px 8px;border-radius:999px;background:var(--b2);color:#3a2f00;margin-bottom:6px}

/* Game page */
.crumbs{font-size:.88rem;color:var(--ink-soft);padding-block:8px 0}
.crumbs a{color:var(--ink-soft)}
.page-title{padding-block:8px 20px}
.page-title p{color:var(--ink-soft);max-width:60ch;margin:0}
.play-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,340px);gap:clamp(24px,4vw,48px);align-items:start}
.play-main{min-width:0}
.stage{position:relative;background:var(--board);border-radius:var(--r-m);overflow:hidden;margin-inline:auto;width:100%}
.stage.landscape{aspect-ratio:16/9;max-height:72vh}
.stage.portrait{width:min(100%,420px);height:min(78vh,740px);aspect-ratio:auto}
.stage iframe{position:absolute;inset:0;width:100%;height:100%;border:0;background:#000}
.poster{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:24px;text-align:center;background:var(--board)}
.poster img,.poster svg.cv{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.28}
.poster>*:not(img):not(svg.cv){position:relative}
.poster .note{font-size:.82rem;color:var(--ink-soft);max-width:36ch;margin:0}
.notice{background:var(--accent-soft);border-radius:var(--r-m);padding:14px 16px;font-size:.92rem;max-width:44ch}
.side{display:grid;gap:20px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r-m);padding:16px 18px}
.panel h2{font-size:1.05rem;margin-bottom:.6em}
.panel ul{margin:0;padding-left:1.1em}
.panel li{margin-bottom:.4em}
.panel p:last-child{margin-bottom:0}
.facts{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:0;font-size:.9rem}
.facts dt{color:var(--ink-soft)}
.facts dd{margin:0}
.prose-block{max-width:68ch}
.prose-block h2{margin-top:1.6em}

/* Long-form reading: serif, generous line height, capped measure */
.prose{font-family:var(--serif);font-size:1.12rem;line-height:1.78;max-width:66ch}
.prose h2,.prose h3{font-family:var(--font);margin-top:1.8em}
.prose h2{font-size:1.45rem}
.prose ol,.prose ul{padding-left:1.3em}
.prose li{margin-bottom:.5em}
.prose .callout{font-family:var(--font);font-size:.95rem;line-height:1.55;background:var(--accent-soft);border-radius:var(--r-m);padding:14px 18px;margin:1.6em 0}
.article-meta{color:var(--ink-soft);font-size:.9rem;margin-bottom:24px}

/* Footer */
.site-footer{border-top:1px solid var(--line);padding-block:28px 36px;font-size:.9rem;color:var(--ink-soft);margin-top:24px}
.site-footer .wrap{display:grid;gap:14px}
.site-footer nav{display:flex;gap:16px;flex-wrap:wrap}
.site-footer a{color:var(--ink)}
.site-footer p{margin:0}

@media (max-width:860px){
  .hero-grid{grid-template-columns:minmax(0,1fr);grid-template-areas:"intro" "game" "help";row-gap:20px}
  .hero-intro{padding-bottom:0}
  .hero-intro h1{max-width:none;font-size:clamp(1.8rem,8vw,2.4rem);margin-bottom:.35em}
  .hero-intro .lede{font-size:1rem}
  .hero-help{padding-top:8px}
  .play-grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}