:root{--ink:#1c1530;--bg:#f4f3f8;--card:#fff;--line:#dcd9e6;--accent:#c4246b;--accent-ink:#fff;--muted:#6b6580}
@media (prefers-color-scheme:dark){:root{--ink:#f1eefb;--bg:#16111f;--card:#211a2f;--line:#352c49;--accent:#ff5c9e;--accent-ink:#1c1530;--muted:#a79fc0}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 'Bricolage Grotesque',system-ui,sans-serif}
header{position:sticky;top:0;z-index:5;display:flex;gap:12px;align-items:center;flex-wrap:wrap;padding:12px 16px;background:var(--bg);border-bottom:1px solid var(--line)}
.logo{font-weight:800;font-size:1.4rem;color:var(--accent);text-decoration:none;letter-spacing:-.02em}
#ask{flex:1;min-width:220px;display:flex;gap:8px}
input,textarea,select{width:100%;padding:10px 14px;border:1px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink);font:inherit}
button{padding:10px 16px;border:0;border-radius:12px;background:var(--accent);color:var(--accent-ink);font:inherit;font-weight:600;cursor:pointer}
button.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
nav{display:flex;gap:8px}
main{padding:16px;max-width:1400px;margin:auto}
.grid{columns:2;column-gap:12px}
@media(min-width:640px){.grid{columns:3}}
@media(min-width:960px){.grid{columns:4}}
@media(min-width:1200px){.grid{columns:5}}
.pin{position:relative;break-inside:avoid;margin-bottom:12px;border-radius:16px;overflow:hidden;background:var(--card)}
.pin img{display:block;width:100%;height:auto}
.pin .meta{padding:8px 12px 12px;font-size:.9rem}
.pin .ai{font-size:.75rem;color:var(--muted)}
.pin .save{position:absolute;top:8px;right:8px;opacity:0;transition:opacity .15s}
.pin:hover .save,.pin:focus-within .save{opacity:1}
@media(hover:none){.pin .save{opacity:1}}
#bar{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap;padding:12px 16px;margin-bottom:16px;border:1px dashed var(--accent);border-radius:14px}
dialog{border:0;border-radius:20px;padding:24px;width:min(420px,92vw);background:var(--card);color:var(--ink)}
dialog::backdrop{background:rgba(10,5,20,.55)}
dialog h2{margin:0 0 12px}
dialog label{display:block;margin:10px 0 4px;font-weight:600}
.row{display:flex;gap:8px;margin-top:16px;justify-content:flex-end}
.err{color:var(--accent);min-height:1.2em;margin:8px 0 0}
.board{display:block;width:100%;text-align:left;margin-top:8px}
#toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 18px;border-radius:99px;opacity:0;pointer-events:none;transition:opacity .2s}
#toast.on{opacity:1}
#empty{text-align:center;color:var(--muted);padding:48px 0}

/* v2 */
header{padding-top:calc(12px + env(safe-area-inset-top))}
body{overscroll-behavior-y:contain}
button,input,select{min-height:44px}
.pin .open{display:block;width:100%;min-height:0;padding:0;background:none;border-radius:0}
.pin img{background:var(--line)}
.pin .meta{display:flex;justify-content:space-between;gap:8px;align-items:flex-start}
.like{min-height:32px;padding:2px 8px;background:transparent;color:var(--muted)}
.like.on{color:var(--accent)}
.big{width:100%;max-height:60vh;object-fit:contain;border-radius:14px;background:var(--bg)}
.row.wrap{flex-wrap:wrap;justify-content:flex-start}
.btn{display:inline-flex;align-items:center;padding:0 16px;min-height:44px;border-radius:12px;font-weight:600;text-decoration:none;color:var(--ink);border:1px solid var(--line)}
@media(max-width:640px){
  #ask{order:3;flex-basis:100%}
  nav{position:fixed;left:0;right:0;bottom:0;z-index:6;padding:8px 12px calc(8px + env(safe-area-inset-bottom));background:var(--bg);border-top:1px solid var(--line)}
  nav button{flex:1;padding:10px 6px}
  main{padding-bottom:96px}
  #toast{bottom:90px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* v3 */
dialog{overflow:auto}
#tabs{display:flex;gap:8px;margin-bottom:12px}
#tabs[hidden],#prof[hidden]{display:none}
#tabs button{background:transparent;color:var(--muted);border:1px solid var(--line)}
#tabs button.on{background:var(--ink);color:var(--bg)}
#prof{padding:8px 0 16px}#prof h1{margin:0}
.boards{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:8px;margin-top:12px}.boards .board{margin:0}
.link{background:none;color:var(--accent);min-height:32px;padding:0}
.cf{display:flex;gap:8px}.cmt{margin-top:10px}.cdel{min-height:28px;padding:0 8px;font-size:.8rem}
.chk{display:flex;gap:6px;align-items:center;margin:0}.chk input{width:auto;min-height:0}

/* v5 */
#vb{display:flex;gap:8px;flex-wrap:wrap;align-items:center;justify-content:space-between;padding:12px 16px;margin-bottom:16px;border:1px solid var(--accent);border-radius:14px}
#vb[hidden]{display:none}

/* v8 */
.chips{display:flex;gap:8px;overflow-x:auto;padding-bottom:8px;margin-bottom:8px}.chips:empty{display:none}
.chip{min-height:36px;padding:4px 14px;background:transparent;color:var(--ink);border:1px solid var(--line);white-space:nowrap}
dialog .chips{flex-wrap:wrap;overflow:visible}
.rel{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.rel button{padding:0;min-height:0;background:none;border-radius:12px;overflow:hidden}.rel img{display:block;width:100%;aspect-ratio:3/4;object-fit:cover}

/* v9 */
.chip.on{background:var(--ink);color:var(--bg)}

/* v10 */
.play{position:absolute;left:8px;top:8px;background:rgba(0,0,0,.6);color:#fff;border-radius:99px;padding:2px 10px;font-size:.8rem;pointer-events:none}
video.big{background:#000}

/* v12: polish */
a{color:var(--accent)}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;z-index:20;background:var(--card);padding:8px 12px;border-radius:8px}
header{backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);background:color-mix(in srgb,var(--bg) 85%,transparent)}
.pin{box-shadow:0 1px 2px rgba(20,10,40,.08);transition:transform .15s,box-shadow .15s}
.pin:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(20,10,40,.14)}
.sk{min-height:120px;background:linear-gradient(90deg,var(--line),var(--card),var(--line));background-size:200% 100%;animation:sh 1.2s infinite}
@keyframes sh{to{background-position:-200% 0}}
@media(prefers-reduced-motion:reduce){.sk{animation:none}}
button:not(.link):hover{filter:brightness(1.08)}
#prof ul{padding-left:20px}
footer{max-width:1400px;margin:auto;padding:24px 16px 96px;color:var(--muted);font-size:.9rem;display:flex;gap:16px;flex-wrap:wrap}

/* v14: progress */
#pbar{position:fixed;left:0;top:0;height:3px;width:0;background:var(--accent);z-index:50;opacity:0;pointer-events:none;transition:width .25s ease,opacity .3s}
#pbar.on{opacity:1}
.pg{height:6px;margin-top:12px;border-radius:99px;background:var(--line);overflow:hidden}
.pg[hidden]{display:none}
.pg i{display:block;height:100%;width:0;background:var(--accent);transition:width .2s}
button.busy{opacity:.75;cursor:progress}
button.busy::after{content:"";display:inline-block;width:.9em;height:.9em;margin-left:8px;vertical-align:-2px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){button.busy::after{animation:none}}

/* v15 */
.like.busy::after,.pin .save.busy::after,.chip.busy::after{display:none}

/* v18: layout fixes */
header{background:none;backdrop-filter:none;-webkit-backdrop-filter:none;isolation:isolate}
header::before{content:"";position:absolute;inset:0;z-index:-1;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
#bar[hidden]{display:none}
#tabs{overflow-x:auto}#tabs button{white-space:nowrap}

/* v19: progress shown on the button itself */
button.busy{position:relative;overflow:hidden;background-image:linear-gradient(90deg,rgba(255,255,255,.4) var(--p,0%),transparent var(--p,0%));transition:background-size .2s}
button.ghost.busy{background-image:linear-gradient(90deg,color-mix(in srgb,var(--accent) 40%,transparent) var(--p,0%),transparent var(--p,0%))}