@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=Barlow+Condensed:wght@400;600;700&family=Barlow:wght@300;400;500;600&display=swap');
:root {
  --bg:#0f1014; --surface:#16181f; --surface2:#1e2028; --border:#2a2d3a;
  --accent:#d11a2a; /* True Engineering Red */
  --accent2:#0078d7; /* Cyan/Blue */
  --text:#d4d8e8; --dim:#6b7080;
  --bright:#eef0f8; --green:#2ecc71;
  --mono:'Share Tech Mono',monospace; --cond:'Barlow Condensed',sans-serif; --sans:'Barlow',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box;}

/* BUMPED BASE FONT SIZE */
body{background:var(--bg);color:var(--text);font-family:var(--sans);font-size:15px;height:100vh;display:flex;flex-direction:column;overflow:hidden;}

/* TOPBAR */
#topbar{height:56px;background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 14px;gap:6px;flex-shrink:0;flex-wrap:nowrap;overflow:hidden;}

/* LARGER LOGO */
#logo{font-family:var(--cond);font-weight:700;font-size:22px;letter-spacing:3px;color:var(--accent);margin-right:8px;white-space:nowrap;}
#logo small{color:var(--dim);font-size:10px;font-weight:400;letter-spacing:1px;vertical-align:middle;margin-left:4px;}
.sep{width:1px;height:28px;background:var(--border);margin:0 6px;flex-shrink:0;}

/* LARGER TOOL BUTTONS */
.tbtn{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:6px;cursor:pointer;color:var(--dim);border:1px solid transparent;transition:all .12s;background:transparent;flex-shrink:0;}
.tbtn:hover{background:var(--surface2);color:var(--bright);border-color:var(--border);}
.tbtn.on{background:var(--accent);color:#fff;border-color:var(--accent);}
.tbtn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}

/* LARGER COLOR CIRCLES */
.clr{width:22px;height:22px;border-radius:50%;cursor:pointer;border:2px solid transparent;flex-shrink:0;display:inline-block;}
.clr:hover,.clr.on{border-color:#fff;}

/* FORCED COLOR PICKER VISIBILITY */
input[type="color"].clr {
  padding: 0;
  background: none;
  border: 2px solid var(--border);
  border-radius: 4px; /* Slightly square to differentiate it */
  cursor: pointer;
}
input[type="color"].clr::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"].clr::-webkit-color-swatch { border: none; border-radius: 2px; }

/* LARGER TOPBAR CONTROLS */
select.sw{background:var(--surface2);border:1px solid var(--border);color:var(--text);padding:4px 6px;border-radius:4px;font-size:12px;font-family:var(--mono);cursor:pointer;outline:none;}
.vbtn{padding:6px 12px;border-radius:4px;cursor:pointer;font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;font-family:var(--cond);border:1px solid var(--border);background:transparent;color:var(--dim);transition:all .12s;white-space:nowrap;}
.vbtn:hover{color:var(--bright);}
.vbtn.on{background:var(--surface2);color:var(--bright);border-color:var(--accent);}
#right-tb{margin-left:auto;display:flex;gap:4px;align-items:center;}

/* MAIN */
#main{flex:1;display:flex;overflow:hidden;}
.pane{flex:1;display:flex;flex-direction:column;overflow:hidden;min-width:0;}
#pane-b{border-left:2px solid var(--accent);display:none;}

/* PANE HEADER (Bigger Fonts) */
.ph{height:36px;background:var(--surface2);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 10px;gap:6px;flex-shrink:0;}
.ph-label{font-family:var(--mono);font-size:11px;letter-spacing:2px;text-transform:uppercase;white-space:nowrap;font-weight:bold;}
.ph-fname{font-size:12px;color:var(--dim);flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.ph-btn{width:24px;height:24px;display:flex;align-items:center;justify-content:center;border-radius:4px;cursor:pointer;color:var(--dim);border:1px solid transparent;background:transparent;transition:all .1s;flex-shrink:0;}
.ph-btn:hover{background:var(--surface);color:var(--bright);border-color:var(--border);}
.ph-btn svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}
.pinfo{font-family:var(--mono);font-size:11px;color:var(--dim);min-width:50px;text-align:center;white-space:nowrap;}
.zoom-info{font-family:var(--mono);font-size:11px;color:var(--dim);min-width:40px;white-space:nowrap;}

/* SCROLL AREA */
.pscroll{flex:1;overflow:auto;background:#0a0b0e;position:relative;}
.pscroll::-webkit-scrollbar{width:8px;height:8px;}
.pscroll::-webkit-scrollbar-track{background:var(--bg);}
.pscroll::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px;}

/* DROP ZONE (Bigger Fonts) */
.dropzone{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:10;}
.dropzone-inner{border:2px dashed var(--border);border-radius:8px;padding:46px 60px;display:flex;flex-direction:column;align-items:center;gap:12px;transition:all .2s;pointer-events:none;}
.dropzone:hover .dropzone-inner,.dropzone.over .dropzone-inner{border-color:var(--accent);background:rgba(209,26,42,.05);}
.dz-icon svg{width:46px;height:46px;fill:none;stroke:var(--dim);stroke-width:1.2;stroke-linecap:round;}
.dz-title{font-family:var(--cond);font-size:18px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--dim);}
.dz-sub{font-family:var(--mono);font-size:11px;color:var(--dim);}
.dz-btn{background:var(--accent);color:#fff;border:none;padding:10px 24px;border-radius:4px;font-family:var(--cond);font-size:14px;font-weight:700;letter-spacing:2px;text-transform:uppercase;cursor:pointer;pointer-events:all;}
.dz-btn:hover{background:#a01420;}

/* PAGES */
.pages-wrap{padding:24px;display:flex;flex-direction:column;align-items:center;gap:16px;}
.page-container{position:relative;box-shadow:0 6px 32px rgba(0,0,0,.8);}
.page-container canvas{display:block;}
.draw-canvas{position:absolute;top:0;left:0;cursor:crosshair;}

/* MARKUP PANEL */
#mpanel{width:240px;background:var(--surface);border-left:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;}
.mp-title{font-family:var(--cond);font-size:13px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--accent);padding:10px 12px 8px;border-bottom:1px solid var(--border);}
#mlist{flex:1;overflow-y:auto;padding:6px;}
#mlist::-webkit-scrollbar{width:5px;}
#mlist::-webkit-scrollbar-thumb{background:var(--border);}
.mi{padding:8px 10px;border-radius:4px;margin-bottom:4px;border:1px solid var(--border);background:var(--surface2);display:flex;align-items:flex-start;gap:8px;cursor:pointer;}
.mi:hover{border-color:var(--accent);}
.mi-bar{width:4px;height:32px;border-radius:2px;flex-shrink:0;}
.mi-info{flex:1;min-width:0;}
.mi-type{font-family:var(--mono);font-size:10px;text-transform:uppercase;letter-spacing:1px;}
.mi-loc{font-size:10px;color:var(--dim);margin-top:2px;}
.mi-del{color:var(--dim);font-size:16px;cursor:pointer;padding:0 2px;line-height:1;}
.mi-del:hover{color:var(--accent);}
.no-mi{font-family:var(--mono);font-size:11px;color:var(--dim);text-align:center;padding:24px 10px;line-height:1.7;}
.mp-foot{padding:10px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:6px;}
.ebtn{width:100%;padding:8px;border:none;border-radius:4px;font-family:var(--cond);font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;cursor:pointer;transition:background .12s;}
.ebtn.primary{background:var(--accent);color:#fff;}
.ebtn.primary:hover{background:#a01420;}
.ebtn.sec{background:var(--surface2);color:var(--dim);border:1px solid var(--border);}
.ebtn.sec:hover{color:var(--bright);}

/* STATUSBAR */
#sbar{height:28px;background:var(--surface);border-top:1px solid var(--border);display:flex;align-items:center;padding:0 14px;gap:18px;flex-shrink:0;}
.si{font-family:var(--mono);font-size:11px;color:var(--dim);display:flex;align-items:center;gap:4px;white-space:nowrap;}
.sdot{width:6px;height:6px;border-radius:50%;background:var(--green);}
#s-tool{color:var(--accent2);font-weight:bold;}
.si.right{margin-left:auto;}

/* COMMENT MODAL */
#cmodal{display:none;position:fixed;inset:0;background:rgba(0,0,0,.75);z-index:200;align-items:center;justify-content:center;}
#cmodal.show{display:flex;}
#cbox{background:var(--surface2);border:1px solid var(--border);border-radius:6px;padding:18px;width:320px;display:flex;flex-direction:column;gap:12px;}
#cbox h4{font-family:var(--cond);font-size:14px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--accent);}
#ctxt{background:var(--bg);border:1px solid var(--border);border-radius:4px;color:var(--bright);padding:10px;font-family:var(--sans);font-size:14px;resize:vertical;outline:none;min-height:70px;width:100%;}
#ctxt:focus{border-color:var(--accent);}
.cbts{display:flex;gap:8px;}
.cbts button{flex:1;padding:8px;border-radius:4px;cursor:pointer;font-family:var(--cond);font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;}
#cok{background:var(--accent);color:#fff;border:none;}
#ccancel{background:var(--surface);color:var(--dim);border:1px solid var(--border);}

/* LICENSE MODAL (FIXED RENDERING JITTER) */
#lmodal {
  position: fixed;
  inset: 0;
  /* Replaced GPU-crashing blur with a solid, dark, slightly transparent background */
  background: rgba(15, 16, 20, 0.95); 
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}
#lbox{background:var(--surface);border:1px solid var(--accent);border-radius:8px;padding:30px;width:650px;display:flex;flex-direction:column;gap:18px;box-shadow:0 10px 50px rgba(0,0,0,0.5);}
#lbox h3{font-family:var(--cond);font-size:22px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--accent);margin-bottom:4px;border-bottom:1px solid var(--border);padding-bottom:12px;}
#lbox p{font-size:14px;line-height:1.6;color:var(--text);}
#lbox .dev-credit{font-family:var(--mono);font-size:13px;color:var(--accent2);background:var(--surface2);padding:12px;border-radius:4px;border-left:4px solid var(--accent2);}
.lbtn{background:var(--accent);color:#fff;border:none;padding:12px;border-radius:4px;font-family:var(--cond);font-size:15px;font-weight:700;letter-spacing:2px;text-transform:uppercase;cursor:pointer;transition:background .2s; margin-top: 10px;}
.lbtn:hover{background:#a01420;}

input[type=file]{display:none;}


/* TEXT & ANNOTATION LAYERS */
.textLayer {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  overflow: hidden;
  line-height: 1;
  text-size-adjust: none;
  forced-color-adjust: none;
  transform-origin: 0 0;
  z-index: 2;
}
.textLayer span {
  color: transparent; /* Makes the text invisible but selectable */
  position: absolute;
  white-space: pre;
  cursor: text;
  transform-origin: 0% 0%;
}
.textLayer ::selection { background: rgba(0, 120, 215, 0.4); }

.annotationLayer {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 3;
}
.annotationLayer section {
  position: absolute;
  cursor: pointer;
}
.annotationLayer .linkAnnotation > a {
  position: absolute;
  font-size: 1em;
  top: 0; left: 0;
  width: 100%; height: 100%;
}
.annotationLayer .linkAnnotation > a:hover {
  background: rgba(209, 26, 42, 0.2); /* Glows red when you hover over a wire link */
}

/* Ensure drawing canvas sits on the very top */
.draw-canvas { z-index: 10; }

/* ── DIFF ENGINE STYLES ── */

/* The master container for the overlay */
.diff-container {
  position: relative;
  background: white; /* Absolute white background is mathematically required for multiply blending */
  box-shadow: 0 6px 32px rgba(0,0,0,.8);
  overflow: hidden;
}

/* The mix-blend-mode is the web-engine equivalent of your Python script.
  It mathematically multiplies the red pixels on top of the cyan pixels beneath them.
*/
.diff-layer {
  position: absolute;
  top: 0; left: 0;
  mix-blend-mode: darken;
}
.diff-layer canvas {
  display: block;
}

/* The Invert Toggle Class.
  This instantly flips the math, turning the white paper dark, and making the Red/Cyan glow.
*/
/* The Invert Toggle Class with Contrast Crush for True Colors */
/* The Invert Toggle Class with Saturation Boost for a "Neon Backlight" effect */
.invert-mode {
  filter: invert(100%) hue-rotate(180deg) saturate(400%);
}

/* SPINNER ANIMATION */
.spinner {
  width: 50px; 
  height: 50px;
  border: 4px solid var(--surface2);
  border-top: 4px solid var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { 
  0% { transform: rotate(0deg); } 
  100% { transform: rotate(360deg); } 
}

/* ── JAVASCRIPT BOUNCER (LOGIN OVERLAY) ── */
#bouncer {
  position: fixed; inset: 0; z-index: 99999;
  background: var(--bg);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
}
.b-logo {
  font-family: var(--cond); font-size: 48px; font-weight: 700;
  letter-spacing: 4px; color: var(--accent); margin-bottom: 8px;
}
.b-sub {
  font-family: var(--mono); font-size: 14px; color: var(--dim);
  letter-spacing: 2px; margin-bottom: 32px;
}
#bpw {
  background: var(--surface2); border: 1px solid var(--border);
  color: var(--bright); font-family: var(--mono); font-size: 16px;
  padding: 12px 16px; border-radius: 4px; width: 280px; text-align: center;
  outline: none; transition: border-color 0.2s;
}
#bpw:focus { border-color: var(--accent); }
.b-btn {
  background: var(--accent); color: white; border: none;
  font-family: var(--cond); font-weight: 700; font-size: 16px;
  letter-spacing: 2px; padding: 12px; width: 280px; border-radius: 4px;
  margin-top: 16px; cursor: pointer; transition: background 0.2s;
}
.b-btn:hover { background: #a01420; }
#b-err {
  color: var(--accent); font-family: var(--mono); font-size: 12px;
  margin-top: 12px; opacity: 0; transition: opacity 0.2s;
}

/* ── WIDER MODAL OVERRIDE ── */
#lbox {
  width: 650px !important;
}