/* Layout: workbench — a tool catalogue on the home view, a two-pane bench (pages left, settings right) inside each tool */
:root{
  --bg:#f3f5f9; --surface:#ffffff; --ink:#131a2c; --muted:#5a6379; --line:#dfe3ec;
  --accent:#2445d4; --accent-ink:#ffffff; --accent-soft:#e6ebff;
  --c-org:#e2553d; --c-opt:#1f9d6b; --c-to:#2f74d8; --c-from:#c0398b; --c-edit:#8a4fd6; --c-sec:#0e8794;
  --ok:#1f9d6b; --err:#c8322a;
  --f-display:"Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --f-body:"Figtree", "Segoe UI", system-ui, -apple-system, sans-serif;
  --f-mono:"JetBrains Mono", ui-monospace, Consolas, monospace;
  --r:12px;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0e1120; --surface:#171b2d; --ink:#e8ebf5; --muted:#9aa2ba; --line:#272d45;
    --accent:#7d95ff; --accent-ink:#0e1120; --accent-soft:#222a4f;
    --c-org:#ff7b63; --c-opt:#3ccf93; --c-to:#5c9bff; --c-from:#ff79c6; --c-edit:#b385ff; --c-sec:#3cc4d4;
    --ok:#3ccf93; --err:#ff6b61; color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0e1120; --surface:#171b2d; --ink:#e8ebf5; --muted:#9aa2ba; --line:#272d45;
  --accent:#7d95ff; --accent-ink:#0e1120; --accent-soft:#222a4f;
  --c-org:#ff7b63; --c-opt:#3ccf93; --c-to:#5c9bff; --c-from:#ff79c6; --c-edit:#b385ff; --c-sec:#3cc4d4;
  --ok:#3ccf93; --err:#ff6b61; color-scheme:dark;
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font:16px/1.55 var(--f-body);-webkit-font-smoothing:antialiased}
img,canvas{max-width:100%}
[hidden]{display:none!important}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.wrap{max-width:1180px;margin:0 auto;padding-left:max(16px, env(safe-area-inset-left,0px));padding-right:max(16px, env(safe-area-inset-right,0px))}

/* header */
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb, var(--bg) 88%, transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;gap:24px;height:64px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;font:800 22px/1 var(--f-display);letter-spacing:-.02em}
.logo-mark{width:30px;height:30px;position:relative;flex:none}
.logo-mark i{position:absolute;width:20px;height:25px;border-radius:3px;border:2px solid var(--ink);background:var(--surface)}
.logo-mark i:first-child{left:0;top:0;transform:rotate(-8deg)}
.logo-mark i:last-child{left:9px;top:4px;background:var(--accent);border-color:var(--accent)}
nav.main{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
nav.main a{text-decoration:none;font-weight:600;font-size:14px;padding:8px 12px;border-radius:8px;color:var(--muted)}
nav.main a:hover{color:var(--ink);background:var(--surface)}
@media (max-width:640px){nav.main a.hide-sm{display:none}}

/* home */
.hero{padding-block:56px 32px;display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:40px;align-items:end}
.hero h1{font:800 clamp(36px,5.4vw,64px)/1.02 var(--f-display);letter-spacing:-.035em;margin:0;text-wrap:balance}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p{margin:0;color:var(--muted);font-size:18px;max-width:46ch}
.badge{display:inline-flex;align-items:center;gap:8px;margin-top:16px;font-size:13px;font-weight:600;padding:6px 12px;border-radius:999px;background:var(--surface);border:1px solid var(--line)}
.badge b{width:8px;height:8px;border-radius:50%;background:var(--ok)}
@media (max-width:820px){.hero{grid-template-columns:1fr;gap:16px;padding-block:36px 20px}}

.search{margin-block:8px 28px;position:relative;max-width:420px}
.search input{width:100%;padding:12px 14px 12px 40px;border-radius:10px;border:1px solid var(--line);background:var(--surface)}
.search svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--muted)}

.group{margin-bottom:36px}
.group h2{font:600 12px/1 var(--f-body);text-transform:uppercase;letter-spacing:.12em;color:var(--muted);margin:0 0 14px;display:flex;align-items:center;gap:10px}
.group h2::after{content:"";flex:1;height:1px;background:var(--line)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.card{display:flex;gap:14px;align-items:flex-start;text-decoration:none;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;transition:transform .15s, border-color .15s, box-shadow .15s}
.card:hover{transform:translateY(-2px);border-color:var(--tc);box-shadow:0 10px 24px -14px color-mix(in srgb,var(--tc) 60%,transparent)}
.card h3{margin:0 0 4px;font:700 16px/1.25 var(--f-body)}
.card p{margin:0;color:var(--muted);font-size:14px;line-height:1.45}
.ico{flex:none;width:42px;height:42px;border-radius:10px;display:grid;place-items:center;color:var(--tc);background:color-mix(in srgb,var(--tc) 13%,transparent)}
.ico svg{width:22px;height:22px}

footer{border-top:1px solid var(--line);margin-top:56px;padding-block:32px 24px;color:var(--muted);font-size:14px;background:var(--surface)}
footer .wrap{display:flex;gap:24px;flex-wrap:wrap;justify-content:space-between;align-items:flex-start}
footer .logo{font-size:18px;color:var(--ink)}
.foot-brand{max-width:420px;display:flex;flex-direction:column;gap:8px}
.foot-brand p{margin:0}
.foot-links{display:flex;gap:18px;flex-wrap:wrap;align-items:center}
.foot-links a{color:var(--ink);font-weight:600;text-decoration:none}
.foot-links a:hover{color:var(--accent)}
footer .copy{margin-top:20px;font-size:13px}
.sel{user-select:all;font-weight:600;color:var(--ink)}

/* tool view */
.tool-head{padding-block:32px 20px;display:flex;gap:18px;align-items:center}
.tool-head .ico{width:56px;height:56px;border-radius:14px}
.tool-head .ico svg{width:28px;height:28px}
.tool-head h1{font:800 clamp(28px,4vw,40px)/1.05 var(--f-display);letter-spacing:-.03em;margin:0}
.tool-head p{margin:4px 0 0;color:var(--muted)}
.back{display:inline-flex;gap:6px;align-items:center;font-size:14px;font-weight:600;color:var(--muted);text-decoration:none;margin-top:24px}
.back:hover{color:var(--ink)}

.drop{border:2px dashed color-mix(in srgb,var(--tc) 45%,var(--line));border-radius:16px;background:var(--surface);padding:56px 20px;text-align:center;cursor:pointer;transition:background .15s}
.drop.over{background:color-mix(in srgb,var(--tc) 8%,var(--surface))}
.drop h2{font:700 22px/1.2 var(--f-display);margin:14px 0 6px}
.drop p{margin:0;color:var(--muted);font-size:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:10px;padding:12px 20px;font-weight:700;cursor:pointer;text-decoration:none;background:var(--accent);color:var(--accent-ink)}
.btn:hover{filter:brightness(1.08)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--bg)}
.btn.big{width:100%;padding:15px;font-size:17px}
.btn.tool-c{background:var(--tc);color:#fff}

.bench{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:20px;align-items:start}
@media (max-width:900px){.bench{grid-template-columns:1fr}}
.pane{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px;min-width:0}
.pane-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.pane-head strong{font-weight:700}
.pane-head span{color:var(--muted);font-size:14px}
.side{position:sticky;top:calc(80px + env(safe-area-inset-top,0px));display:flex;flex-direction:column;gap:16px}
.side h3{margin:0;font:700 18px/1.2 var(--f-display)}
.field{display:flex;flex-direction:column;gap:6px}
.field label,.lbl{font-size:13px;font-weight:600;color:var(--muted)}
.field input[type=text],.field input[type=number],.field select,.field textarea{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--line);background:var(--bg)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.seg{display:flex;flex-wrap:wrap;gap:6px}
.seg label{flex:1 1 auto;min-width:0}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:block;text-align:center;padding:9px 10px;border-radius:8px;border:1px solid var(--line);font-size:14px;font-weight:600;cursor:pointer}
.seg input:checked + span{border-color:var(--tc);background:color-mix(in srgb,var(--tc) 12%,transparent);color:var(--ink)}
.seg input:focus-visible + span{outline:2px solid var(--accent)}
.hint{font-size:13px;color:var(--muted);margin:0}
.note{font-size:13px;padding:10px 12px;border-radius:8px;background:var(--bg);color:var(--muted);margin:0}
.err{color:var(--err);font-weight:600;font-size:14px;margin:0}

/* file list */
.flist{display:flex;flex-direction:column;gap:8px}
.fitem{display:flex;align-items:center;gap:12px;padding:10px;border:1px solid var(--line);border-radius:10px;background:var(--bg)}
.fitem canvas,.fitem img{width:44px;height:56px;object-fit:cover;border-radius:4px;background:#fff;border:1px solid var(--line);flex:none}
.fitem .meta{flex:1;min-width:0}
.fitem .meta b{display:block;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fitem .meta small{color:var(--muted);font-family:var(--f-mono);font-size:12px}
.iconbtn{width:32px;height:32px;display:grid;place-items:center;border-radius:8px;border:1px solid var(--line);background:var(--surface);cursor:pointer;flex:none}
.iconbtn:hover{border-color:var(--ink)}
.iconbtn svg{width:16px;height:16px}

/* page grid */
.pages{display:grid;grid-template-columns:repeat(auto-fill,minmax(122px,1fr));gap:14px}
.pg{position:relative;border-radius:10px;padding:8px 8px 6px;border:2px solid transparent;background:var(--bg);cursor:default;user-select:none;display:flex;flex-direction:column;align-items:center;gap:6px}
.pg .frame{width:100%;aspect-ratio:3/4;display:grid;place-items:center;overflow:hidden}
.pg canvas{max-width:100%;max-height:100%;box-shadow:0 1px 4px rgba(0,0,0,.18);background:#fff;transition:transform .2s}
.pg .num{font:500 12px/1 var(--f-mono);color:var(--muted)}
.pg.clickable{cursor:pointer}
.pg.clickable:hover{border-color:var(--line)}
.pg.sel{border-color:var(--tc);background:color-mix(in srgb,var(--tc) 10%,var(--bg))}
.pg.sel::after{content:"✓";position:absolute;top:6px;right:6px;width:22px;height:22px;border-radius:50%;background:var(--tc);color:#fff;font-size:13px;display:grid;place-items:center;font-weight:700}
.pg.x .frame{opacity:.25}
.pg.x::after{content:"Removed";position:absolute;top:40%;left:50%;transform:translateX(-50%);font-size:12px;font-weight:700;color:var(--err)}
.pg .ctrls{display:flex;gap:4px}
.pg .ctrls .iconbtn{width:28px;height:28px}
.pg.dragging{opacity:.4}
.pg.dropbefore{box-shadow:-4px 0 0 var(--tc)}
.skel{width:80%;aspect-ratio:3/4;background:var(--line);border-radius:3px;animation:pulse 1.2s infinite}
@keyframes pulse{50%{opacity:.5}}

/* progress & results */
.prog{height:6px;border-radius:999px;background:var(--line);overflow:hidden}
.prog i{display:block;height:100%;width:0;background:var(--tc);transition:width .2s}
.result{border:1px solid color-mix(in srgb,var(--ok) 40%,var(--line));background:color-mix(in srgb,var(--ok) 8%,var(--surface));border-radius:12px;padding:16px;display:flex;flex-direction:column;gap:10px}
.result h4{margin:0;font:700 16px/1.2 var(--f-display);color:var(--ok)}
.dl{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;background:var(--surface);border:1px solid var(--line);text-decoration:none;font-weight:600;font-size:14px}
.dl:hover{border-color:var(--ok)}
.dl small{margin-left:auto;font-family:var(--f-mono);color:var(--muted);font-weight:500}
.dl span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dlist{display:flex;flex-direction:column;gap:6px;max-height:260px;overflow:auto}
textarea.out{width:100%;min-height:220px;font:13px/1.5 var(--f-mono);padding:12px;border-radius:8px;border:1px solid var(--line);background:var(--bg);resize:vertical}

/* signature */
.sigpad{width:100%;height:150px;border:1px dashed var(--line);border-radius:10px;background:#fff;touch-action:none;cursor:crosshair;display:block}
.placer{position:relative;display:inline-block;max-width:100%;cursor:crosshair;line-height:0}
.placer canvas.page{box-shadow:0 2px 10px rgba(0,0,0,.2);background:#fff}
.placer img{position:absolute;pointer-events:none;outline:1px dashed var(--c-sec)}
.center{text-align:center}

.how{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:8px}
.how div{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px}
.how b{display:block;font:700 17px/1.2 var(--f-display);margin-bottom:4px}
.how p{margin:0;color:var(--muted);font-size:14px}
@media (max-width:720px){.how{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* content pages */
.prose{max-width:760px;padding-block:40px 8px}
.prose h1{font:800 clamp(30px,4.5vw,44px)/1.08 var(--f-display);letter-spacing:-.03em;margin:0 0 12px;text-wrap:balance}
.prose h2{font:700 21px/1.25 var(--f-display);margin:32px 0 8px}
.prose p,.prose li{color:var(--ink);max-width:68ch}
.prose .lead{font-size:19px;color:var(--muted)}
.prose .muted{color:var(--muted);font-size:14px;margin-top:32px}
.prose ul{padding-left:20px;display:flex;flex-direction:column;gap:6px}
.center-block{text-align:center;margin-inline:auto}
.center-block p{margin-inline:auto}
/* where the file is processed */
.where{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;padding:5px 11px;border-radius:999px;background:var(--surface);border:1px solid var(--line);margin-top:10px}
.where b{width:8px;height:8px;border-radius:50%;background:var(--ok)}
.where.srv b{background:var(--c-to)}
.card .tag{display:inline-block;margin-top:8px;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
/* server file card */
.fcard{display:flex;gap:16px;align-items:center;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--bg)}
.fcard .thumb{width:72px;height:92px;flex:none;display:grid;place-items:center;border-radius:6px;background:var(--surface);border:1px solid var(--line);overflow:hidden;font:700 13px/1 var(--f-mono);color:var(--tc)}
.fcard .thumb canvas{width:100%;height:100%;object-fit:contain}
.fcard .meta{min-width:0;flex:1}
.fcard .meta b{display:block;font-size:17px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fcard .meta small{color:var(--muted);font-family:var(--f-mono);font-size:12.5px}
.prog.busy i{width:35%!important;animation:slide 1.1s ease-in-out infinite}
@keyframes slide{from{transform:translateX(-100%)}to{transform:translateX(290%)}}
/* server pre-render (before scripts run) */
#app > .wrap > .group ul{padding-left:18px;color:var(--muted)}