:root{--bg:#f7f8fb;--card:#fff;--ink:#14161f;--muted:#5b6172;--line:#e3e6ee;--brand:#4f46e5;--brand-ink:#fff;--soft:#eef0ff;--good:#0f7a45;--bad:#b42318;--warn-bg:#fff6e5;--ok-bg:#e9f8ef;--radius:14px}
@media (prefers-color-scheme:dark){:root{--bg:#0f1117;--card:#181b24;--ink:#eceef4;--muted:#a1a7b8;--line:#2a2f3c;--brand:#8b84ff;--brand-ink:#0f1117;--soft:#22243a;--good:#4ade80;--bad:#f87171;--warn-bg:#3a2e14;--ok-bg:#143322}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
a{color:var(--brand)}
img{max-width:100%}
.wrap{max-width:960px;margin:0 auto;padding:0 16px}
header.site{background:var(--card);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:60px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:1.15rem;color:var(--ink);text-decoration:none}
.logo svg{width:28px;height:28px}
nav.top{display:flex;gap:14px;flex-wrap:wrap;font-size:.93rem}
nav.top a{color:var(--muted);text-decoration:none}
nav.top a:hover,nav.top a[aria-current]{color:var(--brand)}
.hero{text-align:center;padding:36px 0 12px}
.hero h1{font-size:clamp(1.6rem,4.5vw,2.4rem);line-height:1.2;margin:0 0 10px}
.hero p{color:var(--muted);margin:0 auto;max-width:640px}
.crumbs{font-size:.85rem;color:var(--muted);padding-top:14px}
.crumbs a{color:var(--muted)}
/* Tool */
#lp-tool{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin:22px 0}
.lp-drop{border:2px dashed var(--line);border-radius:var(--radius);padding:40px 16px;text-align:center;cursor:pointer;transition:.15s}
.lp-drop:hover,.lp-drop:focus,.lp-drop.lp-over{border-color:var(--brand);background:var(--soft);outline:none}
.lp-drop strong{display:block;font-size:1.15rem;margin:8px 0 4px}
.lp-drop small{color:var(--muted)}
.lp-drop svg{width:44px;height:44px;color:var(--brand)}
.lp-drop-msg{color:var(--bad);margin-top:8px}
.lp-btn{display:inline-block;background:var(--brand);color:var(--brand-ink);border:0;border-radius:10px;padding:11px 18px;font:600 1rem system-ui,sans-serif;cursor:pointer;text-decoration:none}
.lp-btn[disabled]{opacity:.45;cursor:not-allowed}
.lp-btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.lp-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:680px){.lp-grid{grid-template-columns:1fr}}
.lp-pane{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:repeating-conic-gradient(#8881 0 25%,transparent 0 50%) 0 0/18px 18px}
.lp-pane figcaption{background:var(--card);padding:6px 10px;font-size:.85rem;color:var(--muted);border-bottom:1px solid var(--line)}
.lp-pane img{display:block;margin:0 auto;max-height:320px;object-fit:contain}
.lp-controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:16px 0}
.lp-controls label,.lp-field>span{display:block;font-weight:600;font-size:.92rem;margin-bottom:4px}
.lp-controls select,.lp-controls input[type=number]{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink);font:inherit}
.lp-controls input[type=range]{width:100%}
.lp-modes{display:flex;gap:16px;flex-wrap:wrap;font-size:.95rem}
.lp-modes label{font-weight:500;display:flex;gap:6px;align-items:center}
.lp-chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.lp-chips button{border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:999px;padding:4px 12px;cursor:pointer;font:inherit;font-size:.88rem}
.lp-chips button:hover{border-color:var(--brand);color:var(--brand)}
.lp-hint{font-size:.82rem;color:var(--muted);margin-top:4px}
.lp-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin:8px 0 12px}
.lp-stats div{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px}
.lp-stats dt{font-size:.8rem;color:var(--muted)}
.lp-stats dd{margin:0;font-weight:700}
.lp-good{color:var(--good)}.lp-bad{color:var(--bad)}
.lp-note{font-size:.92rem;border-radius:8px;min-height:0}
.lp-note:not(:empty){padding:8px 12px;margin-bottom:12px;background:var(--bg)}
.lp-note.lp-warn{background:var(--warn-bg)}.lp-note.lp-ok{background:var(--ok-bg)}
.lp-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.lp-busy{color:var(--muted);font-size:.9rem}
[hidden]{display:none!important}
/* Content */
article.content{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:8px 22px 22px;margin-bottom:22px}
article.content h2{font-size:1.4rem;margin:26px 0 8px;line-height:1.3}
article.content h3{font-size:1.1rem;margin:20px 0 6px}
article.content table{border-collapse:collapse;width:100%;font-size:.93rem;display:block;overflow-x:auto}
article.content th,article.content td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
article.content th{background:var(--bg)}
details{border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin:8px 0;background:var(--bg)}
details summary{font-weight:600;cursor:pointer}
details p{margin:8px 0 2px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin:12px 0}
.cards a{display:block;border:1px solid var(--line);border-radius:10px;padding:12px 14px;text-decoration:none;color:var(--ink);background:var(--bg)}
.cards a:hover{border-color:var(--brand)}
.cards strong{display:block;color:var(--brand)}
.cards span{font-size:.88rem;color:var(--muted)}
footer.site{border-top:1px solid var(--line);background:var(--card);padding:24px 0;font-size:.9rem;color:var(--muted);margin-top:30px}
footer.site nav{display:flex;flex-wrap:wrap;gap:8px 18px;margin-bottom:10px}
footer.site a{color:var(--muted)}
/* Comfortable tap targets on phones */
nav.top a{padding:10px 4px;display:inline-block}
footer.site nav a{padding:10px 2px;display:inline-block}
@media (max-width:480px){nav.top{gap:6px 12px}}
/* Size range + batch list */
.lp-range{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:6px}
.lp-range label{font-weight:500;font-size:.85rem;margin:0}
.lp-range small{color:var(--muted);font-weight:400}
.lp-range input{margin-top:3px}
p.lp-busy{margin:0 0 10px;color:var(--brand);font-weight:600}
.lp-table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px;margin:4px 0 10px}
.lp-table{border-collapse:collapse;width:100%;font-size:.9rem}
.lp-table th,.lp-table td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}
.lp-table th{background:var(--bg);font-weight:600;color:var(--muted);font-size:.8rem}
.lp-table tr:last-child td{border-bottom:0}
.lp-table .lp-fname{max-width:180px;overflow:hidden;text-overflow:ellipsis}
.lp-table .lp-res{white-space:normal;min-width:150px}
.lp-mini{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:8px;padding:5px 10px;cursor:pointer;font:inherit;font-size:.85rem}
.lp-mini:hover:not([disabled]){border-color:var(--brand);color:var(--brand)}
.lp-mini[disabled]{opacity:.4;cursor:default}
.lp-batch-sum{font-size:.92rem;color:var(--muted);margin:0 0 12px}
@media (max-width:520px){.lp-table th:nth-child(2),.lp-table td:nth-child(2){display:none}.lp-table th,.lp-table td{padding:7px 8px}.lp-table .lp-fname{max-width:110px}.lp-table .lp-res{min-width:0}}