:root{--bg-canvas:#ffffff;--bg-surface:#f5f3ef;--bg-surface-hover:#efebe4;--text-primary:#292524;--text-muted:#57534e;--accent-primary:#9a3412;--accent-secondary:#7c2d12;--border-subtle:#d6d3d1;--ease-kinetic:cubic-bezier(0.16,1,0.3,1);--shadow-elevation:none;--glow-accent:none;--glass-backdrop:none;--radius:20px;--serif:Charter,"Bitstream Charter","Sitka Text",Cambria,Georgia,serif;--header-h:56px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;padding:clamp(8px,3.5vw,56px);background:var(--bg-canvas);color:var(--text-primary);font:1.0625rem/1.68 var(--serif);overflow-wrap:anywhere;hyphens:auto}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.18;margin:0 0 .6em;overflow-wrap:anywhere;hyphens:auto}
h1{font-size:clamp(2.1rem,5vw,3.6rem);letter-spacing:-.01em}
h2{font-size:clamp(1.55rem,3vw,2.3rem)}
h3{font-size:1.28rem}
p{margin:0 0 1em}
a{color:var(--accent-primary);text-underline-offset:3px}
a:hover{color:var(--accent-secondary)}
:focus-visible{outline:3px solid var(--accent-primary);outline-offset:3px;border-radius:6px}
img{max-width:100%;height:auto;display:block}
.frame{max-width:1280px;margin:0 auto;border:1px solid var(--border-subtle);border-radius:var(--radius);background:var(--bg-canvas)}
.skip{position:absolute;left:-9999px}
.skip:focus{left:20px;top:20px;background:#fff;padding:8px 14px;z-index:60;border-radius:12px}

/* Header: slim, simple, identical on all pages, scrolls away with the page (not sticky) */
.site-header{position:relative;top:auto;display:flex;align-items:center;gap:16px;min-height:var(--header-h);padding:8px clamp(14px,3vw,32px);background:var(--bg-canvas);border-bottom:1px solid var(--border-subtle);border-radius:var(--radius) var(--radius) 0 0;z-index:30}
.site-header.is-solid{background:var(--bg-canvas);border-bottom-color:var(--border-subtle)}
.brand{display:flex;align-items:center;gap:8px;margin-right:auto;text-decoration:none;color:var(--text-primary);font-weight:700;font-size:1rem;line-height:1;white-space:nowrap;flex-shrink:0}
.brand:hover{color:var(--text-primary)}
.brand-mark{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--accent-primary);color:#fff;font-size:.85rem;line-height:1}
.site-nav ul{display:flex;flex-wrap:nowrap;align-items:center;gap:2px 16px;list-style:none;margin:0;padding:0}
.site-nav li{margin:0}
.site-nav a{display:inline-block;text-decoration:none;color:var(--text-primary);font-size:.88rem;line-height:1.2;letter-spacing:.02em;padding:6px 0;border-bottom:2px solid transparent;white-space:nowrap;transition:color .25s,border-color .25s}
.site-nav a:hover,.site-nav a[aria-current="page"]{color:var(--accent-primary);border-bottom-color:var(--accent-primary)}
.menu-btn{display:none;place-items:center;width:36px;height:36px;padding:0;border:1px solid var(--border-subtle);border-radius:10px;background:var(--bg-canvas);color:var(--text-primary);font-size:1.3rem;font-weight:700;line-height:1;cursor:pointer;transition:background .25s,border-color .25s}
.menu-btn:hover,.menu-btn[aria-expanded="true"]{background:var(--bg-surface);border-color:#a8a29e}

main{padding:0 clamp(16px,4vw,56px) 48px}
.section{padding:clamp(40px,6vw,80px) 0;border-top:1px solid var(--border-subtle)}
.hero,.page-head{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(24px,4vw,56px);align-items:center;padding:clamp(28px,5vw,64px) 0}
.label{display:inline-block;font-variant:small-caps;letter-spacing:.08em;color:var(--accent-primary);font-size:1.02rem;margin:0 0 .5em}
.lead{font-size:1.2rem;color:var(--text-muted);max-width:60ch}
.note{font-size:.98rem;color:var(--text-muted);border-left:3px solid var(--accent-primary);padding-left:14px;max-width:62ch}
.hero-stack{position:relative;min-height:460px}
.hero-stack img{position:absolute;border-radius:var(--radius);border:1px solid var(--border-subtle);object-fit:cover;background:var(--bg-surface);transition:transform .6s var(--ease-kinetic)}
.hero-stack .s1{top:0;left:0;width:60%;aspect-ratio:4/5;z-index:1}
.hero-stack .s2{top:10%;right:0;width:50%;aspect-ratio:1/1;z-index:2}
.hero-stack .s3{bottom:0;left:24%;width:50%;aspect-ratio:4/3;z-index:3}
.hero-stack img:hover{transform:translateY(-6px);z-index:4}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent-primary);color:#fff;border:0;border-radius:999px;padding:12px 24px;font:inherit;font-weight:700;text-decoration:none;cursor:pointer;transition:transform .35s var(--ease-kinetic),background .3s}
.btn:hover{background:var(--accent-secondary);color:#fff;transform:translateY(-2px)}
.btn:focus-visible{outline:3px solid var(--text-primary);outline-offset:3px}
.btn:disabled{opacity:.55;cursor:default;transform:none}
.btn.soft{background:#fbe4d5;color:var(--accent-secondary)}
.btn.soft:hover{background:#f6d2bb}
.row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:16px}
.panel{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:clamp(20px,3vw,36px);transition:border-color .3s,background .3s}
.panel:hover{border-color:#a8a29e}
.panel.plain{background:#fff}
.challenge{display:grid;grid-template-columns:1.35fr 1fr;gap:32px;align-items:start}
.clues{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin:18px 0}
.clue{background:#fff;border:1px solid var(--border-subtle);border-radius:14px;padding:12px 14px}
.clue b{display:block;font-variant:small-caps;letter-spacing:.06em;color:var(--accent-primary);font-weight:400}
.code{letter-spacing:.2em;font-size:1.15rem;font-weight:700}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.grid-auto{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.media{width:100%;border-radius:var(--radius);object-fit:cover;border:1px solid var(--border-subtle);background:var(--bg-surface)}
.r169{aspect-ratio:16/9}.r43{aspect-ratio:4/3}.r11{aspect-ratio:1/1}
.hints ol{padding-left:1.3em;margin:0}
.hint{display:none;margin-bottom:10px}
.hint.is-shown{display:list-item;animation:fadeUp .5s var(--ease-kinetic)}
.hint-count{font-variant:small-caps;letter-spacing:.05em;color:var(--text-muted)}
label{display:block;font-variant:small-caps;letter-spacing:.05em;margin:12px 0 6px}
input,textarea,select{width:100%;font:inherit;color:inherit;padding:12px 14px;border:1px solid var(--border-subtle);border-radius:14px;background:#fff}
textarea{min-height:160px;resize:vertical}
.status{min-height:1.6em;color:var(--text-muted);font-style:italic;margin-top:10px}
.post{border-top:1px dashed var(--border-subtle);padding-top:12px;margin-top:12px}
.post b{font-variant:small-caps;letter-spacing:.05em;font-weight:400;color:var(--accent-primary)}
.prose{max-width:70ch;margin:0 auto}
.prose ul,.prose ol{padding-left:1.3em}
.table-wrap{overflow-x:auto;border:1px solid var(--border-subtle);border-radius:var(--radius);background:var(--bg-surface);padding:8px;margin:20px 0}
table{width:100%;border-collapse:collapse;min-width:560px}
th,td{border-bottom:1px solid var(--border-subtle);padding:10px 12px;text-align:left;vertical-align:top}
th{font-variant:small-caps;letter-spacing:.05em;color:var(--accent-primary);font-weight:400}
tr:last-child td{border-bottom:0}
details{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:16px 20px;margin-bottom:12px}
summary{cursor:pointer;font-weight:700}
details p{margin:.8em 0 0}
.site-footer{border-top:1px solid var(--border-subtle);padding:40px clamp(16px,4vw,56px) 28px;background:var(--bg-surface);border-radius:0 0 var(--radius) var(--radius)}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:28px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:6px}
.foot-brand{font-weight:700;font-size:1.2rem}
.copy{margin:28px 0 0;font-variant:small-caps;letter-spacing:.05em;color:var(--text-muted)}
.js .reveal{opacity:0;transform:translateY(24px)}
.js .reveal.reveal-visible{opacity:1;transform:translateY(0);transition:opacity .7s var(--ease-kinetic),transform .7s var(--ease-kinetic)}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}.js .reveal{opacity:1;transform:none}}
@media (max-width:1024px){.site-nav ul{gap:2px 11px}.site-nav a{font-size:.82rem}}

/* Small screens: three-dot button opens a dropdown menu */
@media (max-width:860px){
.menu-btn{display:grid}
.site-nav{position:absolute;top:calc(100% + 6px);right:clamp(10px,3vw,28px);left:auto;width:min(240px,calc(100vw - 40px));background:var(--bg-canvas);border:1px solid var(--border-subtle);border-radius:14px;padding:6px;box-shadow:0 10px 28px rgba(41,37,36,.12);opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .25s var(--ease-kinetic),transform .25s var(--ease-kinetic),visibility .25s;z-index:40}
.site-nav.is-open{opacity:1;visibility:visible;transform:none}
.site-nav ul{flex-direction:column;align-items:stretch;flex-wrap:nowrap;gap:0}
.site-nav a{display:block;font-size:.92rem;padding:9px 12px;border-bottom:0;border-radius:8px}
.site-nav a:hover{background:var(--bg-surface);border-bottom:0}
.site-nav a[aria-current="page"]{background:#fbe4d5;color:var(--accent-secondary);border-bottom:0}
}
@media (max-width:768px){.hero,.page-head,.challenge,.grid-2{grid-template-columns:1fr}.hero-stack{min-height:380px}}
@media (max-width:480px){body{padding:8px;font-size:1rem}:root{--header-h:52px}.site-header{padding:8px 12px}.brand{font-size:.95rem}.hero-stack{min-height:300px}.lead{font-size:1.08rem}}