/* Utility Toolkit – LIGHT theme (scoped under .utk-app) */
.utk-app{
  --utk-bg:#f4f5fa;--utk-card:#ffffff;--utk-card2:#f6f7fc;--utk-line:#e6e8f2;
  --utk-accent:#6d5cf0;--utk-accent2:#4f8cff;--utk-grad:linear-gradient(135deg,#7c5cff,#4f8cff);
  --utk-pink:linear-gradient(135deg,#ff5fa2,#ff8a5b);
  --utk-text:#1f2430;--utk-muted:#7b8195;--utk-ok:#11936a;--utk-err:#d64545;--utk-gold:#b8860b;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--utk-text);background:var(--utk-bg);border-radius:18px;padding:20px;max-width:1140px;margin:0 auto;box-sizing:border-box
}
.utk-app *{box-sizing:border-box}
.utk-app .utk-loading{padding:48px;text-align:center;color:var(--utk-muted)}

/* Header + search */
.utk-header{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:18px;flex-wrap:wrap}
.utk-header h1{font-size:22px;margin:0;font-weight:800;color:#171a26}
.utk-search{flex:1;min-width:240px;display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--utk-line);border-radius:14px;padding:14px 18px;box-shadow:0 6px 20px rgba(60,70,120,.08)}
.utk-search::before{content:"🔍";font-size:16px;opacity:.6}
.utk-search input{flex:1;background:transparent;border:0;color:var(--utk-text);outline:none;font-size:15px}
.utk-search input::placeholder{color:#9aa0b4}

/* Category pills */
.utk-cats{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px}
.utk-cat-btn{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--utk-line);color:#3a3f52;padding:11px 18px;border-radius:14px;cursor:pointer;font-size:14px;font-weight:600;box-shadow:0 3px 10px rgba(60,70,120,.05);transition:.18s}
.utk-cat-btn:hover{border-color:#c9cdfa;transform:translateY(-1px)}
.utk-cat-btn.active{background:var(--utk-grad);border-color:transparent;color:#fff;box-shadow:0 8px 20px rgba(109,92,240,.35)}

/* Grid wrapper + sections */
.utk-gridwrap{display:block}
.utk-section{margin-bottom:26px}
.utk-section-title{font-size:19px;font-weight:800;color:#171a26;margin:0 0 14px;display:flex;align-items:center;gap:8px}
.utk-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:16px}
.utk-empty{padding:30px;text-align:center;color:var(--utk-muted)}

/* Tool card */
.utk-tile{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid var(--utk-line);border-radius:16px;padding:18px;cursor:pointer;transition:.18s;box-shadow:0 4px 16px rgba(60,70,120,.06)}
.utk-tile:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(60,70,120,.16);border-color:#d7daf5}
.utk-tile-top{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:12px}
.utk-tile .ic{width:54px;height:54px;display:flex;align-items:center;justify-content:center;font-size:26px;border-radius:14px;background:linear-gradient(135deg,#efeaff,#e8f0ff);border:1px solid #eceaff}
.utk-pop{font-size:10px;font-weight:800;letter-spacing:.4px;color:#fff;background:var(--utk-pink);padding:4px 10px;border-radius:20px;box-shadow:0 4px 10px rgba(255,95,162,.35)}
.utk-tile .nm{font-size:16px;font-weight:700;color:#1b1f2c}
.utk-tile .ds{font-size:12.5px;color:var(--utk-muted);margin-top:5px;line-height:1.45;flex:1}
.utk-tile .tier{display:inline-block;font-size:9px;padding:2px 8px;border-radius:6px;margin-top:8px;background:#fff4e0;color:#b8860b;border:1px solid #ffe6b8;align-self:flex-start}
.utk-use{margin-top:14px;width:100%;background:var(--utk-grad);color:#fff;border:0;border-radius:11px;padding:11px;font-size:14px;font-weight:700;cursor:pointer;transition:.18s;box-shadow:0 6px 16px rgba(109,92,240,.28)}
.utk-tile:hover .utk-use{box-shadow:0 10px 22px rgba(109,92,240,.4)}

/* Tool panel */
.utk-panel{display:none}
.utk-panel.active{display:block;background:#fff;border:1px solid var(--utk-line);border-radius:16px;padding:22px;box-shadow:0 8px 26px rgba(60,70,120,.08)}
.utk-back{background:none;border:0;color:var(--utk-accent);cursor:pointer;font-size:14px;font-weight:700;padding:4px 0;margin-bottom:10px}
.utk-tool-head{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.utk-tool-head h2{margin:0;font-size:21px;color:#171a26;font-weight:800}
.utk-tool-desc{color:var(--utk-muted);font-size:13.5px;margin-bottom:14px;line-height:1.55}
.utk-note{background:#fff8e8;border:1px solid #ffe6b0;color:#8a6d1b;padding:9px 12px;border-radius:10px;font-size:12.5px;margin-bottom:14px}

/* How-it-works box */
.utk-how{background:linear-gradient(180deg,#f3f0ff,#eef3ff);border:1px solid #e2def8;border-radius:12px;padding:2px 16px;margin-bottom:18px}
.utk-how summary{cursor:pointer;list-style:none;padding:12px 0;font-size:13.5px;font-weight:700;color:var(--utk-accent)}
.utk-how summary::-webkit-details-marker{display:none}
.utk-how[open] summary{border-bottom:1px solid #e2def8}
.utk-how-body{font-size:13.5px;line-height:1.65;color:#3a3f52;padding:10px 0 14px}

/* Form bits */
.utk-card{background:var(--utk-card2);border:1px solid var(--utk-line);border-radius:12px;padding:16px;margin-bottom:14px}
.utk-row{display:flex;gap:14px;flex-wrap:wrap;align-items:flex-end;margin-bottom:14px}
.utk-field{display:flex;flex-direction:column;gap:6px;flex:1;min-width:150px}
.utk-field label{font-size:12px;color:var(--utk-muted);font-weight:600}
.utk-app input[type=text],.utk-app input[type=number],.utk-app input[type=url],.utk-app input[type=email],.utk-app select,.utk-app textarea{background:#fff;border:1px solid var(--utk-line);color:var(--utk-text);border-radius:10px;padding:10px 12px;font-size:14px;width:100%;outline:none;font-family:inherit}
.utk-app textarea{resize:vertical;min-height:110px;line-height:1.5}
.utk-app input:focus,.utk-app select:focus,.utk-app textarea:focus{border-color:var(--utk-accent);box-shadow:0 0 0 3px rgba(109,92,240,.14)}
.utk-range{display:flex;align-items:center;gap:12px}
.utk-range input[type=range]{flex:1;accent-color:var(--utk-accent)}
.utk-range .val{min-width:58px;text-align:right;font-variant-numeric:tabular-nums;color:var(--utk-accent);font-weight:700;font-size:13px}

/* Buttons */
.utk-btn{background:var(--utk-grad);color:#fff;border:0;border-radius:11px;padding:12px 22px;font-size:14px;font-weight:700;cursor:pointer;transition:.18s;box-shadow:0 6px 16px rgba(109,92,240,.25)}
.utk-btn:hover{box-shadow:0 10px 24px rgba(109,92,240,.4);transform:translateY(-1px)}
.utk-btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}
.utk-btn.primary{background:var(--utk-grad)}
.utk-btn.sec{background:#fff;color:#3a3f52;border:1px solid var(--utk-line);box-shadow:none}
.utk-btn.sec:hover{border-color:#c9cdfa}
.utk-btn.ok{background:linear-gradient(135deg,#16a974,#11936a)}
.utk-btn.small{padding:7px 11px;font-size:14px;flex:0 0 auto;box-shadow:none}
.utk-btns{display:flex;gap:10px;flex-wrap:wrap}

/* Drop zone */
.utk-drop{border:2px dashed #cfd4e8;border-radius:14px;padding:38px 16px;text-align:center;cursor:pointer;transition:.18s;color:var(--utk-muted);background:#fafbff}
.utk-drop:hover,.utk-drop.over{border-color:var(--utk-accent);background:#f3f1ff;color:var(--utk-text)}
.utk-drop .big{font-size:34px;display:block;margin-bottom:6px}
.utk-drop small{display:block;margin-top:6px;font-size:11px}

/* Thumbnails */
.utk-thumbs{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
.utk-thumb{position:relative;width:96px;border:1px solid var(--utk-line);border-radius:10px;overflow:hidden;background:#fff;box-shadow:0 3px 10px rgba(60,70,120,.06)}
.utk-thumb img,.utk-thumb canvas{width:100%;display:block;height:96px;object-fit:cover}
.utk-thumb .cap{font-size:10px;padding:4px;text-align:center;color:var(--utk-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.utk-thumb .x{position:absolute;top:4px;right:4px;width:20px;height:20px;border-radius:50%;border:0;background:rgba(214,69,69,.92);color:#fff;font-size:14px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center}

/* Status + progress */
.utk-status{font-size:13px;padding:11px 13px;border-radius:10px;margin-top:8px;display:none}
.utk-status.show{display:block}
.utk-status.info{background:#eef1fb;color:#4b5563}
.utk-status.ok{background:#e7f8f0;color:var(--utk-ok)}
.utk-status.err{background:#fdecec;color:var(--utk-err)}
.utk-progress{height:8px;background:#eceefb;border-radius:8px;overflow:hidden;margin-top:10px;display:none}
.utk-progress.show{display:block}
.utk-progress .bar{height:100%;width:0;background:var(--utk-grad);transition:width .25s}

/* Preview + output */
.utk-preview{margin-top:14px;text-align:center}
.utk-preview img,.utk-preview canvas{max-width:100%;border-radius:12px;border:1px solid var(--utk-line)}
.utk-out{margin-top:14px}
.utk-out pre{background:#f6f7fc;border:1px solid var(--utk-line);border-radius:10px;padding:13px;white-space:pre-wrap;word-break:break-word;max-height:340px;overflow:auto;font-size:13px;line-height:1.55;color:var(--utk-text)}

/* Crop box */
.utk-cropwrap{position:relative;display:inline-block;max-width:100%;touch-action:none}
.utk-cropwrap canvas{display:block;max-width:100%;border-radius:10px}
.utk-cropbox{position:absolute;border:2px solid var(--utk-accent);background:rgba(109,92,240,.16);cursor:move}
.utk-cropbox .h{position:absolute;width:14px;height:14px;background:var(--utk-accent);border-radius:50%}
.utk-cropbox .h.br{right:-7px;bottom:-7px;cursor:nwse-resize}

/* Colour swatch + stats */
.utk-swatch{width:100%;height:90px;border-radius:12px;border:1px solid var(--utk-line)}
.utk-mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.utk-stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px}
.utk-stat{background:#f6f7fc;border:1px solid var(--utk-line);border-radius:12px;padding:14px;text-align:center}
.utk-stat .n{font-size:24px;font-weight:800;color:var(--utk-accent)}
.utk-stat .l{font-size:11px;color:var(--utk-muted);margin-top:3px}

/* Result rows (font/case/base64/colour/super-sub) */
.utk-results{margin-top:14px;display:flex;flex-direction:column;gap:9px}
.utk-resrow{display:flex;align-items:center;gap:9px;background:#f6f7fc;border:1px solid var(--utk-line);border-radius:10px;padding:9px 12px}
.utk-resval{flex:1;min-width:0}
.utk-reslbl{display:block;font-size:11px;color:var(--utk-muted);margin-bottom:2px;font-weight:600}
.utk-restxt{display:block;font-size:15px;color:var(--utk-text);word-break:break-word;white-space:pre-wrap}
.utk-palette{display:grid;grid-template-columns:repeat(8,1fr);gap:7px;margin-top:8px}
.utk-pcell{height:48px;border-radius:10px;border:1px solid var(--utk-line);cursor:pointer;transition:.12s}
.utk-pcell:hover{transform:scale(1.06)}
.utk-result{margin-top:14px}

/* Superscript / subscript preview */
.utk-subprev{margin-top:14px;display:flex;flex-direction:column;gap:9px}
.utk-subprev-row{display:flex;align-items:center;gap:12px;background:#f6f7fc;border:1px solid var(--utk-line);border-radius:12px;padding:11px 15px}
.utk-subprev-row .lbl{font-size:11px;color:var(--utk-muted);min-width:150px;font-weight:600}
.utk-subprev-row .big{font-size:26px;color:#171a26;word-break:break-word}
.utk-subprev-row .big sub{font-size:.62em}
.utk-subprev-row .big sup{font-size:.62em}

/* Organise PDF page tiles */
.utk-pagetile{width:124px;cursor:grab}
.utk-pagetile.dragging{opacity:.4;cursor:grabbing}
.utk-pagetile.droptarget{outline:2px dashed var(--utk-accent);outline-offset:2px}
.utk-pagetile img,.utk-pagetile canvas{height:150px;object-fit:contain;background:#fff}
.utk-pagectr{display:flex;gap:3px;justify-content:center;padding:5px;background:#f6f7fc;border-top:1px solid var(--utk-line)}
.utk-pagectr .mv{flex:1;background:#fff;border:1px solid var(--utk-line);color:#3a3f52;border-radius:7px;font-size:13px;padding:5px 0;cursor:pointer;transition:.12s}
.utk-pagectr .mv:hover{background:var(--utk-accent);border-color:var(--utk-accent);color:#fff}
.utk-pagectr .mv.del:hover{background:var(--utk-err);border-color:var(--utk-err)}

/* Download interstitial modal (AdSense) */
.utk-modal-ov{position:fixed;inset:0;z-index:99999;background:rgba(20,24,40,.55);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;padding:18px;animation:utkFade .18s ease}
@keyframes utkFade{from{opacity:0}to{opacity:1}}
.utk-modal{width:100%;max-width:540px;background:#fff;border:1px solid #e6e8f2;border-radius:18px;padding:24px;box-shadow:0 30px 80px rgba(20,24,40,.35);color:#1f2430;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif}
.utk-modal-h{font-size:20px;font-weight:800;margin-bottom:4px;color:#171a26}
.utk-modal-sub{font-size:13px;color:#5b6173;margin-bottom:16px}
.utk-ad-wrap{display:block;width:100%;min-height:120px;background:#f6f7fc;border:1px dashed #e6e8f2;border-radius:12px;padding:10px;margin-bottom:8px;overflow:hidden;text-align:center}
.utk-ad-wrap .adsbygoogle{display:block;width:100%}
.utk-ad-label{font-size:10px;letter-spacing:1px;text-transform:uppercase;color:#9aa0b4;margin-bottom:14px;text-align:center}
.utk-modal-row{display:flex;gap:10px;justify-content:flex-end}
/* explicit modal buttons (modal can mount outside .utk-app, so don't rely on vars) */
.utk-modal .utk-btn{background:linear-gradient(135deg,#7c5cff,#4f8cff);color:#fff;border:0;border-radius:11px;padding:12px 22px;font-size:14px;font-weight:700;cursor:pointer;box-shadow:0 6px 16px rgba(109,92,240,.25)}
.utk-modal .utk-btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}
.utk-modal .utk-btn.sec{background:#fff;color:#3a3f52;border:1px solid #d7dae8;box-shadow:none}

/* SEO blocks (outside .utk-app) */
.utk-seo-head{max-width:1140px;margin:0 auto 18px;padding:0 4px}
.utk-seo-title{font-size:clamp(22px,3vw,34px);line-height:1.2;margin:0 0 10px;font-weight:800}
.utk-seo-intro{font-size:15px;line-height:1.6;opacity:.82;margin:0}

.utk-hidden{display:none!important}

/* Background editor (Photopea-style) */
.utk-bgtoolbar{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
.utk-bgtool{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--utk-line);color:#3a3f52;padding:9px 14px;border-radius:10px;cursor:pointer;font-size:13px;font-weight:600;transition:.15s}
.utk-bgtool:hover{border-color:#c9cdfa}
.utk-bgtool.active{background:var(--utk-grad);border-color:transparent;color:#fff;box-shadow:0 6px 14px rgba(109,92,240,.3)}
.utk-bgstage{margin-top:12px;border:1px solid var(--utk-line);border-radius:12px;padding:12px;background:#eef0f6;text-align:center;overflow:auto;max-height:520px}
.utk-bgcanvas{display:inline-block;max-width:100%;border-radius:8px;background-image:linear-gradient(45deg,#ccc 25%,transparent 25%),linear-gradient(-45deg,#ccc 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#ccc 75%),linear-gradient(-45deg,transparent 75%,#ccc 75%);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0;box-shadow:0 4px 16px rgba(0,0,0,.12)}
.utk-bgcanvas canvas{display:block;max-width:100%;touch-action:none;cursor:crosshair;border-radius:8px}

/* Merge file tiles */
.utk-filetile{width:150px;border:1px solid var(--utk-line);border-radius:10px;background:#fff;overflow:hidden;box-shadow:0 3px 10px rgba(60,70,120,.06);cursor:grab;user-select:none}
.utk-filetile.dragging{opacity:.4;cursor:grabbing}
.utk-filetile.droptarget{outline:2px dashed var(--utk-accent);outline-offset:2px}
.utk-filetile .fi{font-size:30px;text-align:center;padding:14px 0 4px}
.utk-filetile .fn{font-size:11px;color:#3a3f52;padding:0 8px 8px;text-align:center;word-break:break-word;line-height:1.3;min-height:30px}

@media(max-width:600px){
  .utk-app{padding:14px;border-radius:0}
  .utk-header{flex-direction:column;align-items:stretch}
  .utk-header h1{font-size:19px;text-align:center}
  .utk-search{min-width:0}
  .utk-cats{gap:8px}
  .utk-cat-btn{padding:9px 14px;font-size:13px}
  .utk-grid{grid-template-columns:1fr 1fr;gap:10px}
  .utk-tile{padding:14px}
  .utk-tile .ic{width:46px;height:46px;font-size:22px}
  .utk-tile .nm{font-size:14px}
  .utk-tile .ds{font-size:11.5px}
  .utk-use{padding:10px;font-size:13px}
  .utk-section-title{font-size:17px}
  .utk-panel.active{padding:16px}
  .utk-subprev-row{flex-direction:column;align-items:flex-start;gap:4px}
  .utk-subprev-row .lbl{min-width:0}
  .utk-modal{padding:18px}
  .utk-field{min-width:120px}
  .utk-filetile{width:46%}
}
@media(max-width:380px){
  .utk-grid{grid-template-columns:1fr}
}