/* HumanBuiltAI Lab — shared styles for the gallery and playground */
:root{--paper:#F5F3EF;--ink:#151413;--ink-2:#4A4741;--ink-3:#6B6760;--rule:#D9D5CE;--panel:#ECE9E3;--card:#FFFFFF;--accent:oklch(0.55 0.2 355);--hot:#E8603C;--header-bg:rgba(245,243,239,0.86);color-scheme:light}
:root[data-theme="dark"]{--paper:#1A1917;--ink:#EEEBE5;--ink-2:#C9C4BB;--ink-3:#A6A198;--rule:#3A3733;--panel:#24221F;--card:#22211E;--accent:oklch(0.72 0.17 355);--header-bg:rgba(26,25,23,0.88);color-scheme:dark}
*{box-sizing:border-box}
html,body{margin:0;background:var(--paper);color:var(--ink)}
body{font-family:'Geist',Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--ink);text-decoration:none}
a:hover{color:var(--accent)}
button{font:inherit;color:inherit}
.mono{font-family:'Geist Mono',monospace;font-size:var(--fs-label);letter-spacing:var(--tr-label);text-transform:uppercase}

/* header */
.hb-head{position:sticky;top:0;z-index:20;background:var(--header-bg);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--rule)}
.hb-head-in{max-width:1440px;margin:0 auto;padding:16px clamp(20px,5vw,48px);display:flex;justify-content:space-between;align-items:center;gap:20px}
.hb-logo{font-size:19px;font-weight:600;letter-spacing:-0.03em}
.hb-nav{display:flex;align-items:center;gap:clamp(14px,2.6vw,32px);white-space:nowrap}
.hb-nav a[aria-current="page"]{color:var(--accent)}
@media (max-width:640px){.hb-nav .hb-wide{display:none}}
.hb-theme{all:unset;cursor:pointer;width:40px;height:40px;margin:-8px -6px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;color:var(--ink)}
.hb-theme:hover{background:var(--panel)}
.hb-theme:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
:root[data-theme="dark"] .hb-moon{display:none}
:root:not([data-theme="dark"]) .hb-sun{display:none}

/* gallery */
.lab-wrap{max-width:1440px;margin:0 auto;padding:calc(var(--page-top) - var(--hdr-h)) clamp(20px,5vw,48px) clamp(80px,10vw,160px)}
.lab-intro{display:flex;flex-wrap:wrap;gap:clamp(24px,4.4vw,64px);margin-bottom:clamp(40px,6vw,88px)}
.lab-intro .mono{flex:1 1 200px;padding-top:14px;border-top:1px solid var(--ink);align-self:start;color:var(--ink-2)}
.lab-intro div{flex:2.6 1 520px;min-width:0;display:flex;flex-direction:column;gap:24px}
.lab-intro h1{font-size:var(--fs-title);line-height:var(--lh-title);letter-spacing:var(--tr-title);font-weight:500;margin:0;text-wrap:balance}
.lab-intro p{font-family:Newsreader,Georgia,serif;font-size:var(--fs-lead);line-height:var(--lh-lead);margin:0;max-width:640px;color:var(--ink-2);text-wrap:pretty}
.lab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,380px),1fr));gap:clamp(36px,4vw,56px) clamp(20px,2.4vw,32px)}
.lab-card{display:flex;flex-direction:column;gap:14px;color:var(--ink)}
.lab-card:hover{color:var(--ink)}
.lab-frame{position:relative;aspect-ratio:3/2;overflow:hidden;background:var(--panel);outline:1px solid var(--rule);outline-offset:-1px}
/* thumbnails render the piece at twice the size, then scale down, so they look like the full experiment */
.lab-frame iframe{position:absolute;top:0;left:0;width:200%;height:200%;border:0;pointer-events:none;transform:scale(0.5);transform-origin:0 0}
.lab-frame .lab-open{position:absolute;right:12px;bottom:12px;background:var(--ink);color:var(--paper);padding:9px 12px;opacity:0;transform:translateY(6px);transition:opacity 250ms ease,transform 250ms ease}
.lab-card:hover .lab-open,.lab-card:focus-visible .lab-open{opacity:1;transform:none}
.lab-card:focus-visible{outline:2px solid var(--ink);outline-offset:6px}
.lab-meta{display:flex;justify-content:space-between;gap:16px;color:var(--ink-2)}
.lab-title{font-size:var(--fs-subhead);line-height:var(--lh-subhead);letter-spacing:var(--tr-subhead);font-weight:500}
.lab-card:hover .lab-title{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:0.14em}
.lab-desc{font-family:Newsreader,Georgia,serif;font-size:var(--fs-body);line-height:var(--lh-body);color:var(--ink-2);max-width:520px;text-wrap:pretty;margin:0}