/* Shared design system for tools.plandorabox.com color tools. */
/* colour tokens live in brand.css */
*{box-sizing:border-box;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}

header.site{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 32px;border-bottom:1px solid var(--border);background:var(--bg);
  flex-wrap:wrap;gap:12px;
}
.brand{display:flex;align-items:center;gap:10px;font-size:14px;flex-wrap:wrap;}
.logo-mark{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr;width:22px;height:22px;gap:2px;border-radius:5px;overflow:hidden;flex:0 0 auto;}
.logo-mark span:nth-child(1){background:var(--pbx-ink);}
.logo-mark span:nth-child(2){background:var(--pbx-ink);}
.logo-mark span:nth-child(3){background:var(--pbx-ink);}
.logo-mark span:nth-child(4){background:var(--pbx-ink);}
.brand-word{font-weight:800;color:var(--navy);}
.brand-word .dim{color:var(--muted);font-weight:600;}
.crumb{color:var(--muted);}
.crumb a:hover{text-decoration:underline;}
.crumb b{color:var(--text);font-weight:700;}
nav.site-nav{display:flex;align-items:center;gap:22px;font-size:13px;font-weight:700;letter-spacing:.03em;color:var(--navy);}
nav.site-nav a{opacity:.85;}
nav.site-nav a:hover{opacity:1;text-decoration:underline;}

.layout{
  display:grid;grid-template-columns:300px minmax(0,760px) 300px;gap:24px;
  max-width:1420px;margin:0 auto;padding:32px 24px 80px;align-items:start;justify-content:center;
}
.col-ads{display:flex;flex-direction:column;gap:20px;}
.ad-box{
  border:1px dashed var(--pbx-border);border-radius:var(--radius);background:var(--pbx-surface-2);color:var(--pbx-faint);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;font-size:12px;padding:12px;position:relative;
}
.ad-box .ad-tag{position:absolute;top:8px;left:10px;font-size:10px;font-weight:800;letter-spacing:.08em;color:var(--pbx-faint);}
.ad-box .ad-dim{font-weight:700;color:var(--pbx-faint);}
.ad-box .ad-sub{margin-top:4px;font-size:11px;color:var(--pbx-faint);}
.ad-600{height:600px;}
.ad-250{height:250px;}

main.center{min-width:0;}
.page-head{margin-bottom:24px;}
.page-head h1{font-size:34px;font-weight:800;margin:0 0 10px;letter-spacing:-.01em;}
.page-head p{margin:0;color:var(--muted);font-size:15px;line-height:1.55;max-width:640px;}

.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin-bottom:20px;}
.card h2{font-size:12px;font-weight:800;letter-spacing:.06em;color:var(--pbx-faint);margin:0 0 16px;}

.field{margin-bottom:16px;}
.field label{display:block;font-size:12px;font-weight:700;color:var(--muted);margin-bottom:6px;}
.field input,.field select{
  width:100%;border:1px solid var(--border);border-radius:10px;padding:12px 14px;
  font-size:15px;font-family:inherit;background:var(--pbx-input);color:var(--text);
}
.field input:focus,.field select:focus{outline:none;border-color:var(--green);background:var(--pbx-input);}
.field-row{display:flex;gap:12px;flex-wrap:wrap;}
.field-row > .field{flex:1;min-width:160px;}

.tabs{display:flex;gap:8px;margin-bottom:18px;flex-wrap:wrap;}
.tab-btn{
  border:none;background:var(--olive);color:var(--olive-text);font-weight:700;font-size:13px;
  padding:8px 16px;border-radius:999px;cursor:pointer;transition:background .15s,color .15s;
}
.tab-btn.active{background:var(--green);color:var(--pbx-on-ink);}
.tab-btn:hover:not(.active){background:var(--pbx-border);}
.calc-panel{display:none;}
.calc-panel.active{display:block;}

.btn-primary{
  width:100%;background:var(--green);color:var(--pbx-on-ink);border:none;font-weight:800;font-size:15px;
  padding:14px 18px;border-radius:10px;cursor:pointer;transition:background .15s;
}
.btn-primary:hover{background:var(--green-dark);}
.btn-primary:disabled{background:var(--pbx-disabled);cursor:not-allowed;}
.btn-outline{
  background:var(--pbx-input);color:var(--navy);border:1px solid var(--border);font-weight:700;font-size:13px;
  padding:10px 16px;border-radius:8px;cursor:pointer;
}
.btn-outline:hover{background:var(--pbx-surface-2);}
.btn-outline.small{padding:6px 12px;font-size:12px;}

.result-panel{background:var(--pbx-surface-2);border:1px solid var(--border);border-radius:10px;padding:20px;margin-top:18px;}
.result-panel.empty{color:var(--pbx-faint);font-size:13px;text-align:center;}
.result-label{font-size:11px;font-weight:800;letter-spacing:.06em;color:var(--pbx-faint);margin-bottom:6px;}
.result-value{font-size:26px;font-weight:800;color:var(--green-dark);line-height:1.2;}
.result-sub{font-size:13px;color:var(--muted);margin-top:6px;line-height:1.5;}

/* ---- color picker ---- */
.picker-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.color-swatch-big{
  width:96px;height:96px;border-radius:14px;border:1px solid var(--border);flex:0 0 auto;
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.03);
}
input[type="color"]{
  -webkit-appearance:none;appearance:none;width:96px;height:96px;padding:0;border:1px solid var(--border);
  border-radius:14px;cursor:pointer;background:none;
}
input[type="color"]::-webkit-color-swatch-wrapper{padding:0;border-radius:14px;}
input[type="color"]::-webkit-color-swatch{border:none;border-radius:14px;}
.value-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-top:18px;}
.value-card{
  background:var(--pbx-input);border:1px solid var(--border);border-radius:10px;padding:12px 14px;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
}
.value-card .value-label{font-size:11px;font-weight:800;color:var(--pbx-faint);letter-spacing:.05em;}
.value-card .value-text{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;font-weight:700;color:var(--text);}

/* ---- palette swatches ---- */
.palette-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;margin-top:16px;}
.palette-swatch{border-radius:10px;overflow:hidden;border:1px solid var(--border);}
.palette-swatch .swatch-color{height:90px;}
.palette-swatch .swatch-info{
  background:var(--pbx-input);padding:8px 10px;display:flex;align-items:center;justify-content:space-between;gap:6px;
}
.palette-swatch .swatch-hex{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px;font-weight:700;}
.palette-swatch .swatch-copy{background:none;border:none;cursor:pointer;font-size:12px;color:var(--muted);padding:2px 4px;}
.palette-swatch .swatch-copy:hover{color:var(--green);}

/* ---- upload zone ---- */
.upload-zone{
  border:2px dashed var(--border);border-radius:10px;padding:32px 20px;text-align:center;
  background:var(--pbx-input);cursor:pointer;transition:border-color .15s,background .15s;
}
.upload-zone:hover,.upload-zone.dragover{border-color:var(--green);background:var(--pbx-surface-2);}
.upload-zone .upload-icon{font-size:28px;margin-bottom:8px;}
.upload-zone .upload-title{font-weight:700;font-size:14px;margin-bottom:4px;}
.upload-zone .upload-sub{font-size:12px;color:var(--muted);}
.preview-image{max-width:100%;max-height:220px;border-radius:10px;margin-top:14px;display:block;}

/* ---- contrast checker ---- */
.contrast-preview{
  border-radius:10px;border:1px solid var(--border);padding:28px 20px;text-align:center;margin-top:16px;
}
.contrast-preview .big-text{font-size:28px;font-weight:800;margin-bottom:6px;}
.contrast-preview .small-text{font-size:15px;}
.contrast-score{display:flex;align-items:center;gap:16px;margin-top:16px;flex-wrap:wrap;}
.contrast-ratio-value{font-size:40px;font-weight:800;color:var(--green-dark);}
.badge-row{display:flex;gap:8px;flex-wrap:wrap;}
.badge{
  font-size:11px;font-weight:800;padding:6px 10px;border-radius:999px;letter-spacing:.03em;
}
.badge.pass{background:var(--pbx-surface-2);color:var(--green-dark);}
.badge.fail{background:var(--pbx-error-bg);color:var(--pbx-error);}

.faq{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:28px;overflow:hidden;}
.faq-item{border-bottom:1px solid var(--border);}
.faq-item:last-child{border-bottom:none;}
.faq-q{
  width:100%;background:none;border:none;text-align:left;padding:18px 22px;font-size:15px;font-weight:800;
  color:var(--text);cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;font-family:inherit;
}
.faq-q .plus{flex:0 0 auto;font-size:18px;font-weight:400;color:var(--muted);width:20px;text-align:center;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease, padding .2s ease;padding:0 22px;font-size:14px;color:var(--muted);line-height:1.6;}
.faq-item.open .faq-a{max-height:260px;padding:0 22px 18px;}

.related-label{font-size:11px;font-weight:800;letter-spacing:.06em;color:var(--pbx-faint);margin-bottom:12px;}
.related-pills{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px;}
.related-pill{
  background:var(--card);border:1px solid var(--border);border-radius:12px;padding:12px 16px;
  font-weight:700;font-size:14px;display:flex;align-items:center;gap:8px;transition:border-color .15s,background .15s;
}
.related-pill:hover{border-color:var(--green);background:var(--pbx-input);}
.related-pill .arrow{color:var(--green);font-weight:800;}
.related-pill.current{background:var(--olive);border-color:transparent;color:var(--olive-text);pointer-events:none;}
.related-pill.current .arrow{display:none;}

.hub-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:28px;}
.hub-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:border-color .15s,transform .15s;}
.hub-card:hover{border-color:var(--green);transform:translateY(-2px);}
.hub-card .hub-kicker{font-size:11px;font-weight:800;letter-spacing:.05em;color:var(--pbx-faint);margin-bottom:6px;}
.hub-card h3{margin:0 0 6px;font-size:16px;font-weight:800;}
.hub-card p{margin:0;font-size:13px;color:var(--muted);line-height:1.5;}

.notice{background:var(--pbx-surface-2);border:1px solid var(--pbx-border);color:var(--pbx-ink);border-radius:10px;padding:12px 14px;font-size:13px;line-height:1.5;margin-bottom:16px;}

@media (max-width:1180px){.layout{grid-template-columns:1fr;}.col-ads{display:none;}}
@media (max-width:720px){
  header.site{padding:14px 18px;}
  .layout{padding:24px 16px 60px;}
  .page-head h1{font-size:28px;}
  .field-row{flex-direction:column;}
  .picker-row{flex-direction:column;align-items:flex-start;}
}