:root{
  --bg:#050816;
  --card:#111A3A;
  --ink:#F5F7FB;
  --muted:#8E9AB5;
  --brand:#19E3C8;
  --brand-dark:#0FC9B0;
  --accent:#19E3C8;
  --line:rgba(215,222,234,.12);
  --ok:#19E3C8;
  --warn:#F59E0B;
  --radius:16px;
  --shadow:0 8px 32px rgba(0,0,0,.35);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}

/* header */
header.site{position:sticky;top:0;z-index:50;background:rgba(5,8,22,.85);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.2rem;color:var(--ink);letter-spacing:-.02em}
.logo svg{width:28px;height:28px;flex-shrink:0}
.logo span{color:var(--brand)}
nav.links{display:flex;gap:22px;font-size:.92rem}
nav.links a{color:var(--muted);font-weight:500}
nav.links a:hover{color:var(--ink);text-decoration:none}

/* hero */
.hero{text-align:center;padding:72px 20px 48px}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);letter-spacing:-.03em;line-height:1.12;margin-bottom:16px;color:var(--ink)}
.hero h1 .hl{color:var(--brand)}
.hero p.sub{color:var(--muted);font-size:1.12rem;max-width:640px;margin:0 auto 12px}
.badge{display:inline-block;background:rgba(25,227,200,.12);color:var(--brand);font-weight:600;
  font-size:.85rem;padding:7px 16px;border-radius:999px;margin-bottom:20px;border:1px solid rgba(25,227,200,.25)}

/* tool cards */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;
  max-width:960px;margin:32px auto 16px;padding:0 20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;box-shadow:var(--shadow);transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-4px);border-color:rgba(25,227,200,.35);text-decoration:none}
.card .icon{font-size:2rem;margin-bottom:12px}
.card h3{color:var(--ink);font-size:1.15rem;margin-bottom:8px}
.card p{color:var(--muted);font-size:.93rem}

/* tool page */
.tool-head{text-align:center;padding:52px 20px 12px}
.tool-head h1{font-size:clamp(1.7rem,4vw,2.4rem);letter-spacing:-.02em;margin-bottom:12px;color:var(--ink)}
.tool-head p.sub{color:var(--muted);max-width:640px;margin:0 auto}
.toolbox{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);max-width:720px;margin:28px auto;padding:32px}
.dropzone{border:2px dashed rgba(25,227,200,.35);border-radius:14px;background:rgba(25,227,200,.06);
  padding:48px 20px;text-align:center;cursor:pointer;transition:.15s}
.dropzone:hover,.dropzone.over{border-color:var(--brand);background:rgba(25,227,200,.12)}
.dropzone .big{font-size:2.4rem;margin-bottom:8px}
.dropzone p{color:var(--muted);font-size:.95rem}
.dropzone strong{color:var(--brand)}
.filelist{margin:20px 0;display:flex;flex-direction:column;gap:10px}
.filerow{display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.04);border:1px solid var(--line);
  border-radius:12px;padding:12px 14px;font-size:.92rem}
.filerow .name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:500;color:var(--ink)}
.filerow .size{color:var(--muted);font-size:.82rem;white-space:nowrap}
.filerow button{border:1px solid var(--line);background:transparent;border-radius:8px;
  padding:5px 12px;cursor:pointer;font-size:.85rem;color:var(--muted)}
.filerow button:hover{border-color:var(--brand);color:var(--brand)}
.btn{display:block;width:100%;border:0;border-radius:14px;padding:16px;font-size:1.05rem;
  font-weight:700;color:#050816;background:var(--brand);
  cursor:pointer;margin-top:8px;transition:.15s}
.btn:hover:not(:disabled){filter:brightness(1.08)}
.btn:disabled{opacity:.55;cursor:wait}
.status{margin-top:16px;font-size:.95rem;min-height:1.6em;text-align:center}
.status.ok{color:var(--ok);font-weight:600}
.status.err{color:#F87171;font-weight:600}
.progress{height:8px;background:rgba(25,227,200,.15);border-radius:99px;margin-top:12px;overflow:hidden;display:none}
.progress.show{display:block}
.progress>div{height:100%;width:0;background:var(--brand);
  border-radius:99px;transition:width .2s}
.field{margin:18px 0}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:.95rem;color:var(--ink)}
.field input[type=text],.field select{width:100%;padding:12px 14px;border:1px solid var(--line);
  border-radius:12px;font-size:1rem;background:#0A1026;color:var(--ink)}
.field .hint{color:var(--muted);font-size:.85rem;margin-top:6px}
.result-box{background:rgba(25,227,200,.08);border:1px solid rgba(25,227,200,.3);border-radius:12px;
  padding:16px;margin-top:18px;font-size:.95rem;display:none;color:var(--ink)}
.result-box.show{display:block}

/* content sections */
section.block{max-width:720px;margin:52px auto;padding:0 20px}
section.block h2{font-size:1.4rem;margin-bottom:14px;letter-spacing:-.01em;color:var(--ink)}
section.block ol,section.block ul{padding-left:22px;color:var(--muted)}
section.block li{margin-bottom:8px}
.why{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-top:18px}
.why div{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px}
.why strong{display:block;margin-bottom:6px;color:var(--ink)}
.why p{color:var(--muted);font-size:.9rem}
details.faq{background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:16px 18px;margin-bottom:12px}
details.faq summary{font-weight:600;cursor:pointer;color:var(--ink)}
details.faq p{color:var(--muted);margin-top:8px;font-size:.95rem}

footer.site{border-top:1px solid var(--line);margin-top:72px;padding:32px 0;color:var(--muted);
  font-size:.88rem;text-align:center}
footer.site .flinks{display:flex;gap:18px;justify-content:center;margin-bottom:12px;flex-wrap:wrap}
footer.site a{color:var(--muted)}
footer.site a:hover{color:var(--brand)}
@media(max-width:640px){nav.links{display:none}.toolbox{padding:24px 18px}}

/* --- shared additions (Claude 2026-10-25): new tools --- */
.btn-ghost{background:transparent;color:var(--brand);border:1px solid rgba(25,227,200,.45)}
.btn-ghost:hover:not(:disabled){background:rgba(25,227,200,.1);filter:none}
.range{width:100%;accent-color:var(--brand)}
.filelabel{color:var(--muted);text-align:center;margin-bottom:6px;font-size:.92rem;word-break:break-all}
.sigpad{display:block;width:100%;height:170px;background:#fff;border-radius:12px;border:1px solid var(--line);touch-action:none;cursor:crosshair}
.sigtools{display:flex;align-items:center;gap:10px;margin:10px 0 4px;color:var(--muted);font-size:.9rem}
.ink{width:28px;height:28px;border-radius:50%;background:var(--c);border:2px solid transparent;cursor:pointer;box-shadow:0 0 0 1px var(--line)}
.ink[aria-pressed="true"]{border-color:var(--brand)}
.linkbtn{margin-left:auto;background:none;border:0;color:var(--brand);font-size:.92rem;cursor:pointer;text-decoration:underline}
.sigpreview{max-height:60px;margin:12px auto 0;background:#fff;border-radius:8px;padding:4px 10px}
.sigpages{display:flex;flex-direction:column;gap:18px;margin:18px 0}
.sigpage{position:relative;width:100%;background:#fff;border-radius:6px;overflow:hidden;box-shadow:0 4px 18px rgba(0,0,0,.35);cursor:copy;touch-action:pan-y}
.sigpage canvas{display:block;width:100%;height:100%}
.sigpage .pnum{position:absolute;left:8px;top:8px;background:rgba(5,8,22,.7);color:#fff;font-size:.75rem;padding:2px 8px;border-radius:99px;pointer-events:none}
.sigbox{position:absolute;border:1.5px dashed var(--brand);border-radius:4px;cursor:move;touch-action:none;background:rgba(25,227,200,.06)}
.sigbox img{width:100%;height:100%;display:block;pointer-events:none;user-select:none}
.sigbox .del{position:absolute;top:-13px;right:-13px;width:26px;height:26px;border-radius:50%;border:0;background:#F87171;color:#fff;font-size:.8rem;cursor:pointer;line-height:26px;padding:0}
.sigbox .grip{position:absolute;right:-9px;bottom:-9px;width:20px;height:20px;border-radius:50%;background:var(--brand);border:3px solid #050816;cursor:nwse-resize}

/* Home button (2026-10-25): back to the Lunibyte homepage */
.nav .links{margin-left:auto}
.home-btn{display:inline-flex;align-items:center;gap:6px;border:1px solid rgba(236,206,127,.55);color:#ECCE7F;border-radius:999px;padding:6px 14px;font-size:.88rem;font-weight:600;white-space:nowrap;margin-left:22px}
.home-btn:hover{background:rgba(236,206,127,.12);text-decoration:none;color:#F8E5A6}

/* Pricing cards: pin the buy button to the bottom so all three plans align (2026-10-25) */
.plans .card{display:flex;flex-direction:column}
.plans .card p.buy{margin-top:auto;padding-top:14px}

/* --- page tools (Claude 2026-10-26) --- */
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:14px;margin:18px 0}
.pcard{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:12px;padding:8px;text-align:center}
.body-rotate .pcard,[data-tool="rotate"] .pcard{cursor:pointer}
.pthumb{height:150px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.pthumb img{max-width:100%;max-height:140px;box-shadow:0 2px 10px rgba(0,0,0,.4);transition:transform .2s;background:#fff}
.plabel{color:var(--muted);font-size:.78rem;margin-top:6px}
.pbar{display:flex;justify-content:center;gap:4px;margin-top:6px}
.pbar button{border:1px solid var(--line);background:transparent;color:var(--muted);border-radius:8px;width:30px;height:30px;cursor:pointer;font-size:.9rem;padding:0}
.pbar button:hover{border-color:var(--brand);color:var(--brand)}
.ptools{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-top:6px}
.ptools .linkbtn{margin-left:0}
.check{display:flex;gap:8px;align-items:center;color:var(--ink);font-size:.95rem;margin:6px 0 4px}

/* ===== Light theme + header toggle (Muse, 2026-10-26) =====
   Dark remains the default design. data-theme="light" on <html> swaps the
   palette variables; the toggle button is injected by js/common.js and the
   choice persists in localStorage (key nu_theme). */
:root[data-theme="light"]{--bg:#F3F5FA;--card:#FFFFFF;--ink:#141B31;--muted:#5B6B8C;--line:rgba(20,27,49,.14);--shadow:0 8px 32px rgba(20,27,49,.10)}
:root[data-theme="light"] header.site{background:rgba(255,255,255,.88)}
.theme-btn{display:inline-flex;align-items:center;gap:6px;background:transparent;border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:6px 14px;font-size:.88rem;font-weight:600;white-space:nowrap;margin-left:22px;cursor:pointer;font-family:inherit}
.theme-btn:hover{color:var(--ink)}

/* ===== Support chat (Muse, 2026-10-26) =====
   Floating button bottom-right; on tool pages it stacks above the usage
   badge (#nu-badge), which sits in the same corner. Panel talks to the
   Lunibyte assistant at /api/chat (same endpoint as the homepage chat). */
.chat-fab{position:fixed;right:18px;bottom:18px;z-index:9999;width:54px;height:54px;border-radius:50%;border:1px solid var(--line);background:var(--brand);color:#04211C;font-size:1.35rem;cursor:pointer;box-shadow:var(--shadow)}
.chat-fab.above-badge{bottom:78px}
.chat-panel{position:fixed;right:18px;bottom:84px;z-index:9999;width:min(92vw,360px);height:min(480px,72vh);background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);display:flex;flex-direction:column;overflow:hidden}
.chat-panel.above-badge{bottom:144px}
.chat-panel[hidden]{display:none}
.chat-head{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid var(--line);color:var(--ink)}
.chat-close{background:none;border:none;color:var(--muted);font-size:1rem;cursor:pointer}
.chat-msgs{flex:1;overflow-y:auto;padding:12px 16px;display:flex;flex-direction:column;gap:8px}
.chat-msg{max-width:85%;padding:8px 12px;border-radius:12px;font-size:.92rem;line-height:1.45;white-space:pre-wrap;word-break:break-word}
.chat-msg.bot{background:rgba(127,140,170,.16);color:var(--ink);align-self:flex-start}
.chat-msg.user{background:var(--brand);color:#04211C;align-self:flex-end}
.chat-form{display:flex;gap:8px;padding:10px 12px;border-top:1px solid var(--line)}
.chat-form input{flex:1;background:var(--bg);border:1px solid var(--line);border-radius:10px;color:var(--ink);padding:9px 12px;font:inherit;font-size:.92rem;min-width:0}
.chat-form button{background:var(--brand);color:#04211C;border:none;border-radius:10px;padding:9px 16px;font-weight:700;cursor:pointer}
.chat-form button:disabled{opacity:.55;cursor:wait}
.chat-note{margin:0;padding:0 12px 10px;font-size:.75rem;color:var(--muted)}

/* guides */
.crumbs{color:var(--muted);font-size:.85rem;margin-bottom:10px}
.crumbs a{color:var(--muted)}
.byline{color:var(--muted);font-size:.9rem;margin-top:10px}
article.guide{max-width:720px;margin:28px auto 0;padding:0 20px;font-size:1.05rem}
article.guide h2{font-size:1.45rem;margin:42px 0 12px;letter-spacing:-.01em;color:var(--ink);line-height:1.3}
article.guide h3{font-size:1.12rem;margin:28px 0 8px;color:var(--ink)}
article.guide p{margin:0 0 16px;color:#C9D1E3}
article.guide ul,article.guide ol{margin:0 0 18px;padding-left:24px;color:#C9D1E3}
article.guide li{margin-bottom:8px}
article.guide strong{color:var(--ink)}
article.guide code{background:#0A1026;border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:.9em;overflow-wrap:anywhere}
article.guide a{text-decoration:underline;text-underline-offset:2px}
.tablewrap{overflow-x:auto;margin:0 0 20px}
article.guide table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:420px}
article.guide th,article.guide td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top;color:#C9D1E3}
article.guide th{background:var(--card);color:var(--ink)}
article.guide p.cta{margin:20px 0 8px}
article.guide p.cta a.btn{display:inline-block;width:auto;text-decoration:none;padding:14px 24px}
aside.more{margin-top:48px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px 24px}
aside.more h2{margin:0 0 10px;font-size:1.1rem}
aside.more ul{margin:0}
.gcards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:24px}
.gcard{display:block;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;color:var(--ink)}
.gcard:hover{border-color:var(--brand);text-decoration:none}
.gcard strong{display:block;font-size:1.05rem;margin-bottom:8px;line-height:1.35}
.gcard p{color:var(--muted);font-size:.9rem;margin-bottom:12px}
.gcard span{color:var(--brand);font-size:.88rem;font-weight:600}
.guide-link{max-width:720px;margin:28px auto 0;padding:0 20px;color:var(--muted);font-size:.95rem}