:root{
  --paper:#F6F3EC;
  --paper-line:#E3DDCE;
  --ink:#1C1A17;
  --steel:#3D5A73;
  --steel-dark:#2C4257;
  --orange:#C08A34;
  --orange-dark:#9C6E24;
  --amber:#D9A441;
  --teal:#2F6E68;
  --teal-dark:#234F4A;
  --plum:#7C4A6B;
  --plum-dark:#5E3650;
  --graphite:#6E6455;
  --card:#FFFFFF;
  --card-hi:#FFFFFF;
  --text-on-dark:#F2ECDD;
  --readout-bg:#14120F;
  --readout-bg-hi:#1E1B16;
  --readout-fg:#F2D9A0;
  --radius:6px;
  --radius-sm:3px;
  --shadow-sm:0 1px 2px rgba(28,26,23,0.07), 0 1px 1px rgba(28,26,23,0.05);
  --shadow-md:0 4px 14px rgba(28,26,23,0.10), 0 1px 3px rgba(28,26,23,0.08);
  --shadow-lg:0 16px 38px rgba(28,26,23,0.16), 0 4px 10px rgba(28,26,23,0.09);
  --shadow-inset:inset 0 1px 3px rgba(0,0,0,0.4), inset 0 0 0 1px rgba(255,255,255,0.03);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
html,body{overflow-x:hidden;max-width:100%;}
body{
  margin:0;
  background:
    radial-gradient(1100px 480px at 8% -10%, rgba(192,138,52,0.06), transparent 60%),
    radial-gradient(900px 420px at 100% 0%, rgba(47,110,104,0.06), transparent 55%),
    linear-gradient(var(--paper-line) 1px, transparent 1px) 0 0/100% 28px,
    var(--paper);
  color:var(--ink);
  font-family:'Inter',sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px;}
:focus-visible{outline:2px solid var(--orange);outline-offset:2px;}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.01ms !important;transition-duration:0.01ms !important;}
}

/* HEADER — dark charcoal band */
header{
  position:sticky;top:0;z-index:50;
  background:linear-gradient(165deg, #211E19, var(--ink));
  border-bottom:1px solid rgba(242,236,221,0.08);
  box-shadow:0 4px 18px rgba(0,0,0,0.25);
}
.headbar{
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:8px 16px;
  padding:16px 0 10px;
}
.logo{
  font-family:'Space Grotesk',sans-serif;
  font-weight:700;font-size:26px;letter-spacing:-0.02em;
  text-decoration:none;
  color:var(--text-on-dark);
  display:inline-flex;align-items:center;
}
@media(max-width:480px){
  .logo{font-size:19px;}
}
.logo span{color:var(--orange);}

/* RULER NAV */
.ruler{
  display:flex;overflow-x:auto;
  border-top:1px solid rgba(242,236,221,0.08);
  scrollbar-width:none;
}
.ruler::-webkit-scrollbar{display:none;}
.tick{
  flex:0 0 auto;
  position:relative;
  padding:11px 16px 12px;
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  letter-spacing:0.04em;
  color:rgba(242,236,221,0.55);
  text-decoration:none;
  white-space:nowrap;
  border-right:1px solid rgba(242,236,221,0.08);
  transition:color .15s, background .15s;
}
.tick::before{
  content:'';
  position:absolute;top:0;left:0;
  width:1px;height:6px;
  background:rgba(242,236,221,0.18);
}
.tick:hover{color:var(--text-on-dark);background:rgba(242,236,221,0.06);}
.tick.active{color:var(--orange);background:rgba(192,138,52,0.12);}
.tick.active::after{
  content:'';
  position:absolute;bottom:0;left:0;right:0;height:2px;
  background:var(--orange);
  box-shadow:0 0 10px rgba(192,138,52,0.6);
}

/* Category tabs (buttons, reset from default button styling) */
.cat-tab{
  cursor:pointer;
  appearance:none;-webkit-appearance:none;
}
.cat-tab.cat-open{color:var(--orange);background:rgba(192,138,52,0.12);}
.cat-tab.cat-open::after{
  content:'';
  position:absolute;bottom:0;left:0;right:0;height:2px;
  background:var(--orange);
}

/* Sub-ruler: second-tier row, collapses closed by default */
.sub-ruler{
  max-height:0;
  overflow-x:auto;
  overflow-y:hidden;
  -webkit-overflow-scrolling:touch;
  background:#141210;
  border-top:0 solid rgba(242,236,221,0.08);
  transition:max-height .22s ease;
}
.sub-ruler.open{
  max-height:120px;
  border-top-width:1px;
}
.sub-tick{display:none;}
.sub-tick.cat-visible{display:flex;}
.sub-tick.active{color:var(--orange);}
.sub-tick.active::after{
  content:'';
  position:absolute;bottom:0;left:0;right:0;height:2px;
  background:var(--orange);
}

/* HERO */
.hero{padding:60px 0 42px;border-bottom:1px solid var(--paper-line);}
.hero .eyebrow{
  font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--teal-dark);
  text-transform:uppercase;letter-spacing:0.08em;margin-bottom:16px;
  display:inline-flex;align-items:center;gap:8px;
}
.hero .eyebrow::before{
  content:'';width:16px;height:1px;background:var(--orange);display:inline-block;
}
.hero h1{
  font-family:'Space Grotesk',sans-serif;
  font-size:clamp(32px,5.2vw,52px);
  line-height:1.06;
  letter-spacing:-0.025em;
  margin:0 0 18px;
  max-width:680px;
  color:var(--ink);
}
.hero p{
  color:var(--graphite);font-size:16.5px;max-width:580px;line-height:1.65;margin:0;
}

/* BREADCRUMB */
.crumb{
  font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--graphite);
  padding:16px 0 0;letter-spacing:0.03em;
}
.crumb a{color:var(--teal-dark);text-decoration:none;}
.crumb a:hover{text-decoration:underline;}

/* AD SLOT */
.ad-slot{
  margin:36px 0;
  border:1px dashed var(--paper-line);
  background:repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(28,26,23,0.025) 10px, rgba(28,26,23,0.025) 20px);
  padding:14px;
  text-align:center;
  font-family:'JetBrains Mono',monospace;
  font-size:10px;
  color:var(--graphite);
  letter-spacing:0.06em;
  border-radius:var(--radius-sm);
}

/* TOOL SECTIONS */
.tool{
  padding:48px 0;
  border-bottom:1px solid var(--paper-line);
  scroll-margin-top:90px;
}
.tool-head{display:flex;align-items:baseline;gap:12px;margin-bottom:22px;}
.tool-num{
  font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--orange);
}
.tool h2{
  font-family:'Space Grotesk',sans-serif;font-size:24px;margin:0;letter-spacing:-0.01em;
}
.tool-sub{color:var(--graphite);font-size:14px;margin:2px 0 0;}

.card{
  position:relative;
  background:linear-gradient(180deg, var(--card-hi), #FBF8F1);
  border:1px solid var(--paper-line);
  border-radius:var(--radius);
  padding:26px;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:24px;
  box-shadow:var(--shadow-md);
}
@media(max-width:640px){.card{grid-template-columns:1fr;padding:20px;}}

.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px;}
.field label{
  font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--graphite);
  text-transform:uppercase;letter-spacing:0.05em;
}
input,select,textarea{
  font-family:'Inter',sans-serif;
  font-size:15px;
  padding:10px 12px;
  border:1px solid var(--paper-line);
  border-radius:var(--radius-sm);
  background:#fff;
  color:var(--ink);
  outline:none;
  width:100%;
  min-width:0;
  max-width:100%;
  transition:border-color .15s, box-shadow .15s;
  box-shadow:inset 0 1px 2px rgba(28,26,23,0.05);
}
input:hover,select:hover{border-color:#CFC6B0;}
input:focus,select:focus,textarea:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(47,110,104,0.14);}
textarea{resize:vertical;min-height:120px;font-family:'Inter',sans-serif;}
.row2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px;}
.row3{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) minmax(0,1fr);gap:12px;}
@media(max-width:520px){.row3{grid-template-columns:1fr;}}

/* Segmented toggle */
.seg{display:inline-flex;border:1px solid var(--paper-line);border-radius:var(--radius-sm);overflow:hidden;background:#fff;}
.seg button{
  background:transparent;color:var(--graphite);border:none;border-radius:0;
  padding:9px 14px;font-size:11px;box-shadow:none;
}
.seg button.active{background:var(--teal);color:#fff;}
.seg button:not(.active):hover{background:rgba(47,110,104,0.08);color:var(--ink);}

.readout{
  position:relative;
  background:linear-gradient(160deg, var(--readout-bg-hi), var(--readout-bg));
  border-radius:var(--radius);
  padding:22px;
  display:flex;flex-direction:column;justify-content:center;
  gap:10px;
  box-shadow:var(--shadow-inset), var(--shadow-md);
  overflow:hidden;
}
.readout::before{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg, transparent, rgba(242,217,160,0.25), transparent);
}
.readout .r-label{
  font-family:'JetBrains Mono',monospace;font-size:10px;color:#9C9284;
  text-transform:uppercase;letter-spacing:0.08em;
}
.readout .r-value{
  font-family:'JetBrains Mono',monospace;
  font-size:28px;font-weight:700;
  color:var(--readout-fg);
  line-height:1.2;
  text-shadow:0 0 18px rgba(242,217,160,0.2);
}
.readout .r-sub{font-size:12px;color:#9C9284;font-family:'JetBrains Mono',monospace;}
.readout .r-row{display:flex;justify-content:space-between;align-items:baseline;border-top:1px solid rgba(255,255,255,0.08);padding-top:8px;margin-top:2px;gap:12px;}
.readout .r-row:first-child{border-top:none;padding-top:0;margin-top:0;}

button{
  font-family:'JetBrains Mono',monospace;
  font-size:12px;letter-spacing:0.05em;text-transform:uppercase;
  background:var(--orange);color:#fff;
  border:none;border-radius:var(--radius-sm);
  padding:11px 18px;cursor:pointer;
  transition:transform .12s, box-shadow .12s, background .15s;
  box-shadow:0 2px 0 var(--orange-dark), var(--shadow-sm);
}
button:hover{background:#CE9A44;}
button:active{transform:translateY(2px);box-shadow:0 0 0 var(--orange-dark);}
button.ghost{
  background:transparent;color:var(--teal-dark);border:1px solid var(--teal);
  box-shadow:none;
}
button.ghost:hover{background:rgba(47,110,104,0.08);}
button.ghost:active{transform:translateY(1px);}
.btn-row{display:flex;gap:10px;margin-top:4px;flex-wrap:wrap;}

footer{padding:40px 0 60px;text-align:center;}
footer p{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--graphite);}

.checks{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:14px;}
.checks label{
  display:flex;align-items:center;gap:6px;
  font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--ink);
  text-transform:none;letter-spacing:0;
}
.checks input[type=checkbox]{width:14px;height:14px;padding:0;box-shadow:none;}

/* ARTICLE / EXPLAINER TEXT */
.article{max-width:640px;color:var(--ink);line-height:1.7;font-size:15px;}
.article h3{font-family:'Space Grotesk',sans-serif;font-size:16px;margin:22px 0 8px;color:var(--ink);}

/* HOMEPAGE TOOL DIRECTORY */
.tool-grid{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:14px;margin:20px 0 10px;
}
@media(max-width:640px){.tool-grid{grid-template-columns:1fr;}}
.tool-card-link{
  display:flex;flex-direction:column;gap:2px;
  position:relative;
  background:linear-gradient(180deg, var(--card-hi), #FBF8F1);
  border:1px solid var(--paper-line);
  border-radius:var(--radius);
  padding:20px 22px;
  text-decoration:none;
  box-shadow:var(--shadow-sm);
  transition:border-color .15s, box-shadow .18s, transform .18s;
}
.tool-card-link:hover{
  border-color:var(--orange);
  box-shadow:var(--shadow-lg);
  transform:translateY(-3px);
}
.tcl-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;}
.tcl-icon{
  width:36px;height:36px;padding:8px;box-sizing:border-box;
  border-radius:var(--radius-sm);
  background:rgba(61,90,115,0.10);
  color:var(--steel);
  flex-shrink:0;
}
.tcl-icon svg{width:100%;height:100%;display:block;}
.tool-card-link .tcl-num{
  font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--graphite);
  margin-bottom:0;
}
.tool-card-link h3{
  font-family:'Space Grotesk',sans-serif;font-size:18px;margin:4px 0 4px;color:var(--ink);
}
.tool-card-link p{font-size:13px;color:var(--graphite);margin:0;line-height:1.5;}

/* Category color coding */
.cat-finance .tcl-icon,.cat-finance .hero-icon{background:rgba(192,138,52,0.14);color:var(--orange-dark);}
.cat-health .tcl-icon,.cat-health .hero-icon{background:rgba(47,110,104,0.14);color:var(--teal);}
.cat-education .tcl-icon,.cat-education .hero-icon{background:rgba(124,74,107,0.14);color:var(--plum);}
.cat-utility .tcl-icon,.cat-utility .hero-icon{background:rgba(61,90,115,0.12);color:var(--steel);}
.cat-finance:hover{border-color:var(--orange);}
.cat-health:hover{border-color:var(--teal);}
.cat-education:hover{border-color:var(--plum);}
.cat-utility:hover{border-color:var(--steel);}

/* PAGE HERO ICON (tool pages) */
.hero-icon-row{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.hero-icon{
  width:42px;height:42px;padding:9px;box-sizing:border-box;
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  flex-shrink:0;
}
.hero-icon svg{width:100%;height:100%;display:block;}
.hero-icon-row .eyebrow{margin-bottom:0;}

/* HOMEPAGE HERO ILLUSTRATION */
.hero-flex{display:flex;align-items:center;gap:40px;justify-content:space-between;}
.hero-flex .hero-copy{flex:1 1 420px;min-width:280px;}
.hero-graphic{flex:0 0 auto;width:340px;max-width:40vw;}
.hero-graphic svg{width:100%;height:auto;display:block;}
@media(max-width:780px){
  .hero-flex{flex-direction:column;align-items:flex-start;gap:14px;}
  .hero-graphic{width:260px;max-width:70vw;align-self:center;}
}

/* SCIENTIFIC CALCULATOR */
.sci-wrap{max-width:420px;margin:0 auto;}
.sci-display{
  background:linear-gradient(160deg, var(--readout-bg-hi), var(--readout-bg));
  border-radius:var(--radius);
  padding:18px 16px;
  margin-bottom:12px;
  box-shadow:var(--shadow-inset), var(--shadow-md);
}
.sci-expr{
  font-family:'JetBrains Mono',monospace;font-size:12px;color:#9C9284;
  min-height:16px;overflow-x:auto;white-space:nowrap;
}
.sci-val{
  font-family:'JetBrains Mono',monospace;font-size:32px;font-weight:700;color:var(--readout-fg);
  overflow-x:auto;white-space:nowrap;text-align:right;
  text-shadow:0 0 18px rgba(242,217,160,0.2);
}
.sci-mode{display:flex;gap:8px;margin-bottom:10px;font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--graphite);}
.sci-mode button{
  background:transparent;color:var(--graphite);border:1px solid var(--paper-line);
  padding:5px 10px;font-size:10px;box-shadow:none;
}
.sci-mode button.active{background:var(--plum);color:#fff;border-color:var(--plum);}
.sci-grid{
  display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;
}
.sci-grid button{
  background:var(--card);color:var(--ink);border:1px solid var(--paper-line);
  padding:12px 4px;font-size:12px;text-transform:none;font-family:'JetBrains Mono',monospace;
  box-shadow:var(--shadow-sm);
}
.sci-grid button:hover{border-color:var(--plum);background:#fff;}
.sci-grid button:active{transform:translateY(1px);}
.sci-grid button.op{background:var(--plum);color:#fff;border-color:var(--plum);}
.sci-grid button.eq{background:var(--orange);color:#fff;border-color:var(--orange);}
.sci-grid button.wide{grid-column:span 2;}

/* TABS */
.tabs{display:flex;gap:8px;margin-bottom:22px;flex-wrap:wrap;}
.tabs button{
  background:var(--card);color:var(--graphite);border:1px solid var(--paper-line);
  padding:9px 16px;font-size:11px;box-shadow:var(--shadow-sm);
}
.tabs button.active{background:var(--ink);color:#fff;border-color:var(--ink);}
.tab-panel{display:none;}
.tab-panel.active{display:block;animation:fadeIn .2s ease;}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px);}to{opacity:1;transform:translateY(0);}}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--radius);box-shadow:var(--shadow-sm);}
.bracket-table{width:100%;border-collapse:collapse;margin-top:14px;font-family:'JetBrains Mono',monospace;font-size:12px;background:var(--card-hi);min-width:420px;}
.bracket-table th,.bracket-table td{text-align:left;padding:8px 12px;border-bottom:1px solid var(--paper-line);}
.bracket-table th{color:var(--graphite);font-weight:500;text-transform:uppercase;font-size:10px;letter-spacing:0.05em;background:var(--paper);}
.bracket-table tbody tr:last-child td{border-bottom:none;}
.bracket-table tbody tr:hover{background:rgba(192,138,52,0.05);}
.disclaimer{
  background:linear-gradient(180deg, var(--card-hi), #FBF8F1);border-left:3px solid var(--orange);
  padding:14px 18px;font-size:13px;color:var(--graphite);line-height:1.6;margin-bottom:24px;
  border-radius:0 var(--radius) var(--radius) 0;box-shadow:var(--shadow-sm);
}
.section-label{
  font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--teal-dark);
  text-transform:uppercase;letter-spacing:0.06em;margin:0 0 12px;
  padding-bottom:8px;border-bottom:1px solid var(--paper-line);
}
.summary-strip{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;
  background:var(--paper-line);border-radius:var(--radius);overflow:hidden;
  margin-top:16px;box-shadow:var(--shadow-sm);
}
@media(max-width:640px){.summary-strip{grid-template-columns:1fr;}}
.summary-strip .cell{background:var(--card-hi);padding:14px 16px;}
.summary-strip .cell .lbl{font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--graphite);text-transform:uppercase;letter-spacing:0.05em;}
.summary-strip .cell .val{font-family:'JetBrains Mono',monospace;font-size:18px;font-weight:700;color:var(--ink);margin-top:4px;}

/* MORE TOOLS LIST */
.more-tools{padding:40px 0;}
.more-tools h2{font-family:'Space Grotesk',sans-serif;font-size:18px;margin:0 0 14px;color:var(--ink);}
.more-tools ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:10px;}
.more-tools a{
  font-family:'JetBrains Mono',monospace;font-size:12px;
  border:1px solid var(--paper-line);border-radius:var(--radius-sm);
  padding:8px 12px;text-decoration:none;color:var(--teal-dark);
  background:var(--card-hi);box-shadow:var(--shadow-sm);
  transition:border-color .15s, transform .15s;
}
.more-tools a:hover{border-color:var(--teal);transform:translateY(-1px);}

/* HOMEPAGE CATEGORY SECTIONS */
.section-head{margin:48px 0 20px;}
.section-head h2{
  font-family:'Space Grotesk',sans-serif;font-size:22px;margin:0 0 4px;
  letter-spacing:-0.01em;color:var(--ink);
}
.section-head p{color:var(--graphite);font-size:14px;margin:0;}
.new-pill{
  display:inline-block;font-family:'JetBrains Mono',monospace;font-size:10px;
  letter-spacing:0.06em;background:var(--orange);color:#fff;padding:3px 9px;
  border-radius:var(--radius-sm);font-weight:700;margin-bottom:10px;
}

/* PWA INSTALL BANNER */
#installBanner{
  display:none;align-items:center;justify-content:space-between;gap:16px;
  background:linear-gradient(165deg, #211E19, var(--ink));
  color:var(--text-on-dark);border-radius:var(--radius);
  padding:16px 22px;margin:28px 0 0;box-shadow:var(--shadow-md);
}
#installBanner p{margin:0;font-size:13px;line-height:1.4;color:rgba(242,236,221,0.7);}
#installBanner p strong{
  font-family:'Space Grotesk',sans-serif;display:block;font-size:16px;
  margin-bottom:2px;color:var(--text-on-dark);
}
#installBanner .btn-row{margin-top:0;flex-wrap:nowrap;}
#installBanner button.ghost{
  color:rgba(242,236,221,0.6);border-color:rgba(242,236,221,0.25);
}
@media(max-width:640px){
  #installBanner{flex-direction:column;align-items:flex-start;}
}