:root{
  --void:#000000;
  --ink:#05070B;
  --raise:#0A0D14;
  --hair:rgba(255,255,255,.09);
  --hair-2:rgba(255,255,255,.16);
  --text:#F2F4F8;
  --dim:#7C8496;
  --faint:#4A5162;
  --ion:#7DE2FF;
  --ok:#5BE6A4;
  --err:#FF7A6B;
  --amber:#FFC46B;
  --radius:2px;
  --font:'Space Grotesk',system-ui,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,monospace;
  --micro:11px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  background:var(--void);color:var(--text);
  font-family:var(--font);font-size:15px;line-height:1.55;
  min-height:100vh;-webkit-font-smoothing:antialiased;
}
::selection{background:rgba(125,226,255,.22)}
a{color:inherit;text-decoration:none}

/* ---------- brand mark, two-act choreography (canonical: devops-tools/css/style.css) ---------- */
.mark{display:block;width:26px;height:26px;color:#C3C9D4;flex:none;transition:color .3s}
.mark svg{width:100%;height:100%;display:block;overflow:visible}
.mark path{transform-box:fill-box;transform-origin:center}
.brand{display:flex;align-items:center;gap:11px}
.brand:hover .mark{color:#FFFFFF}
@keyframes markArrive{
  from{opacity:0;transform:translate(var(--fx,0),var(--fy,0)) scale(var(--fs,2.2));filter:blur(3px)}
  60%{filter:blur(.4px)}
  to{opacity:1;transform:none;filter:none}
}
.mark.arrive .s1{--fx:-30px;--fy:8px;--fs:2.6;animation:markArrive .85s cubic-bezier(.2,.7,.2,1) .05s both}
.mark.arrive .s2{--fx:-12px;--fy:-26px;--fs:2.2;animation:markArrive .85s cubic-bezier(.2,.7,.2,1) .22s both}
.mark.arrive .s3{--fx:-6px;--fy:30px;--fs:2.0;animation:markArrive .8s cubic-bezier(.2,.7,.2,1) .40s both}
.mark.arrive .s4{--fx:16px;--fy:-30px;--fs:2.4;animation:markArrive .85s cubic-bezier(.2,.7,.2,1) .55s both}
.mark.arrive .s5{--fx:24px;--fy:24px;--fs:2.0;animation:markArrive .8s cubic-bezier(.2,.7,.2,1) .72s both}
.mark.arrive .swoop{--fx:30px;--fy:-26px;--fs:1.3;animation:markArrive .7s cubic-bezier(.2,.7,.2,1) 1.0s both}
.mark.spin{animation:markSpin .9s cubic-bezier(.45,.05,.25,1)}
@keyframes markSpin{from{transform:rotate(0)}to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){
  .mark.spin,.mark.arrive .s1,.mark.arrive .s2,.mark.arrive .s3,
  .mark.arrive .s4,.mark.arrive .s5,.mark.arrive .swoop{animation:none}
}

/* ---------- topbar ---------- */
.topbar{
  display:flex;align-items:center;gap:16px;padding:0 20px;height:56px;
  border-bottom:1px solid var(--hair);position:sticky;top:0;z-index:30;
  background:rgba(0,0,0,.82);backdrop-filter:blur(20px) saturate(140%);
}
.wordmark{font-family:var(--mono);font-size:var(--micro);letter-spacing:.34em;text-transform:uppercase;font-weight:500}
.topbar .tm{font-family:var(--mono);font-size:var(--micro);letter-spacing:.16em;text-transform:uppercase;color:var(--faint)}
.topbar a.tm:hover{color:var(--text)}
.topbar .grow{margin-left:auto}
.nav-toggle{display:none;background:none;border:1px solid var(--hair-2);color:var(--text);border-radius:var(--radius);width:34px;height:34px;cursor:pointer;font-size:16px}

/* ---------- shell: sidebar + main ---------- */
.shell{display:flex;max-width:1280px;margin:0 auto}
.sidebar{
  width:230px;flex:none;padding:20px 12px;border-right:1px solid var(--hair);
  position:sticky;top:56px;align-self:flex-start;height:calc(100vh - 56px);overflow-y:auto;
}
.nav-group{
  font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--faint);padding:14px 10px 6px;
}
.nav-btn{
  display:flex;align-items:center;gap:10px;width:100%;text-align:left;
  background:none;border:none;color:var(--dim);font:inherit;font-size:13px;
  padding:8px 10px;border-radius:var(--radius);cursor:pointer;transition:background .14s,color .14s;
}
.nav-btn:hover{background:var(--raise);color:var(--text)}
.nav-btn.active{background:rgba(125,226,255,.08);color:var(--ion)}
.nav-btn .idx{font-family:var(--mono);font-size:10px;color:var(--faint);flex:none}

main{flex:1;min-width:0;padding:32px 32px 90px}
.panel{display:none}
.panel.active{display:block;max-width:760px}
.panel h1{font-size:clamp(26px,4vw,36px);font-weight:600;letter-spacing:-.01em}
.panel h2{font-size:22px;font-weight:600;margin-bottom:14px}
.lede{color:var(--dim);margin-top:10px;max-width:520px}
.hint{color:var(--dim);font-size:13px;margin-bottom:14px}
.gap-note{margin-top:30px;color:var(--faint);font-size:13px;border-top:1px solid var(--hair);padding-top:16px}
.gap-note a{color:var(--ion)}

.tile-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin-top:26px}
.tool-tile{
  text-align:left;background:var(--ink);border:1px solid var(--hair);border-radius:6px;
  padding:16px;cursor:pointer;color:var(--text);transition:border-color .16s,transform .16s;
}
.tool-tile:hover{border-color:rgba(125,226,255,.4);transform:translateY(-2px)}
.tool-tile h3{font-size:15px;font-weight:600}
.tool-tile p{color:var(--dim);font-size:13px;margin-top:4px}

/* ---------- shared controls ---------- */
.dropzone{
  border:1.5px dashed var(--hair-2);border-radius:8px;padding:36px 20px;
  text-align:center;color:var(--dim);cursor:pointer;transition:border-color .16s,background .16s;
  margin-bottom:16px;
}
.dropzone:hover,.dropzone.drag{border-color:var(--ion);color:var(--text);background:rgba(125,226,255,.04)}
.field-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:16px;font-size:13px;color:var(--dim)}
.field-row label{display:flex;align-items:center;gap:6px}
.field-row input[type=text],.field-row input[type=number],.field-row select{
  background:var(--raise);border:1px solid var(--hair-2);border-radius:var(--radius);
  color:var(--text);font:inherit;font-size:13px;padding:6px 9px;
}
button.primary,button.ghost{
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  border-radius:var(--radius);padding:11px 18px;cursor:pointer;font-weight:500;border:none;
  transition:filter .16s,opacity .16s;
}
button.primary{background:var(--ion);color:#03242C}
button.primary:hover:not(:disabled){filter:brightness(1.08)}
button.primary:disabled{opacity:.35;cursor:default}
button.ghost{background:transparent;border:1px solid var(--hair-2);color:var(--text)}
button.ghost:hover{border-color:var(--ion);color:var(--ion)}
.status{margin-top:14px;font-size:13px;color:var(--dim);white-space:pre-line}
.status.err{color:var(--err)}
.status.ok{color:var(--ok)}

.file-list{list-style:none;margin-bottom:16px}
.file-list li{
  display:flex;align-items:center;gap:10px;padding:8px 10px;border:1px solid var(--hair);
  border-radius:var(--radius);margin-bottom:6px;background:var(--ink);cursor:grab;font-size:13px;
}
.file-list li.dragging{opacity:.4}
.file-list .fname{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-list .fsize{color:var(--faint);font-family:var(--mono);font-size:11px}
.file-list button{background:none;border:none;color:var(--faint);cursor:pointer;font-size:16px;line-height:1}
.file-list button:hover{color:var(--err)}

.thumb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px;margin-bottom:16px}
.thumb{
  border:2px solid var(--hair);border-radius:4px;overflow:hidden;cursor:grab;position:relative;background:var(--ink);
}
.thumb img{width:100%;display:block}
.thumb .pg{position:absolute;bottom:3px;right:5px;font-family:var(--mono);font-size:10px;background:rgba(0,0,0,.6);padding:1px 5px;border-radius:2px}
.thumb.excluded{opacity:.3;border-color:var(--err)}
.thumb.dragging{opacity:.3}
.thumb .rot{position:absolute;top:3px;left:3px;background:rgba(0,0,0,.6);border:none;color:#fff;border-radius:2px;width:20px;height:20px;cursor:pointer;font-size:11px}

.crop-canvas-wrap{position:relative;display:inline-block;max-width:100%;margin-bottom:16px}
.crop-canvas-wrap canvas{max-width:100%;display:block;border:1px solid var(--hair)}
.crop-box{position:absolute;border:2px dashed var(--ion);background:rgba(125,226,255,.08);cursor:move}
.crop-stage{margin-top:6px}

.sig-pad-wrap{margin-bottom:16px}
#sigPad{background:#fff;border-radius:6px;cursor:crosshair;touch-action:none}
.sig-ghost{position:absolute;border:1px dashed var(--ion);pointer-events:none;opacity:.85}
.sign-stage{display:flex;flex-wrap:wrap;gap:20px}

.compare-drops{display:flex;gap:14px;flex-wrap:wrap}
.compare-drops .dropzone{flex:1;min-width:220px}
.compare-out{margin-top:18px;font-family:var(--mono);font-size:12.5px;line-height:1.7;max-height:60vh;overflow:auto}
.compare-out .pg-head{color:var(--faint);margin:14px 0 4px;letter-spacing:.08em;text-transform:uppercase;font-size:10px}
.compare-out del{background:rgba(255,122,107,.22);color:#FF9C90;text-decoration:none}
.compare-out ins{background:rgba(91,230,164,.2);color:#8FF0C4;text-decoration:none}

footer{
  border-top:1px solid var(--hair);color:var(--faint);
  padding:22px 24px;display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:center;
  font-family:var(--mono);font-size:var(--micro);letter-spacing:.12em;text-transform:uppercase;
}

@media (max-width:820px){
  .nav-toggle{display:block}
  .sidebar{
    position:fixed;left:0;top:56px;bottom:0;background:var(--void);z-index:25;
    transform:translateX(-100%);transition:transform .2s;width:250px;
  }
  .sidebar.open{transform:translateX(0)}
  main{padding:24px 18px 90px}
}