:root{
  --paper:#F4F5F1;
  --surface:#FFFFFF;
  --ink:#152238;
  --ink-soft:#5B6472;
  --accent:#B6862C;
  --accent-soft:#EFE3C4;
  --line:#DADBD3;
  --unit-a:#152238;
  --unit-b:#B6862C;
  --radius:10px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--paper);color:var(--ink);font-family:'Inter',sans-serif;line-height:1.6}
a{color:var(--ink);text-decoration:none}
a:hover{color:var(--accent)}

header{background:var(--ink);padding:18px 0}
.header-inner{max-width:1180px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.brand{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:21px;color:#fff}
.brand span{color:var(--accent)}
.brand a{color:#fff}
.brand a:hover{color:var(--accent)}

.hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:32px;height:32px;background:none;border:none;cursor:pointer;padding:0}
.hamburger span{display:block;width:22px;height:2px;background:#fff;border-radius:2px}
@media (max-width:860px){
  .hamburger{display:flex}
  .header-inner{flex-wrap:nowrap}
  .brand{order:0}
  .hamburger{order:-1}
  .site-search{order:1;width:100%;flex-basis:100%}
}

.site-search{position:relative;width:320px;max-width:100%;font-family:'Inter',sans-serif}
.site-search input[type=search]{width:100%;padding:9px 14px;border-radius:20px;border:1px solid #2b3a55;background:#0F1929;color:#EDEEE9;font-size:13.5px;outline:none}
.site-search input[type=search]::placeholder{color:#8592A8}
.site-search input[type=search]:focus{border-color:var(--accent)}
.site-search-results{display:none;position:absolute;top:calc(100% + 6px);left:0;right:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(0,0,0,.18);max-height:340px;overflow-y:auto;z-index:50}
.site-search-results.open{display:block}
.ssr-item{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 14px;font-size:13.5px;color:var(--ink);border-bottom:1px solid var(--line)}
.ssr-item:last-child{border-bottom:none}
.ssr-item:hover{background:var(--paper);color:var(--ink)}
.ssr-title{font-weight:500}
.ssr-type{font-size:11px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.03em;flex-shrink:0}
.ssr-empty{padding:14px;font-size:13px;color:var(--ink-soft);text-align:center}
@media (max-width:640px){.site-search{width:100%}}

.wrap{max-width:760px;margin:0 auto;padding:0 20px}
.layout{max-width:1180px;margin:0 auto;padding:32px 20px 80px;display:grid;grid-template-columns:1fr 260px;gap:32px}
@media (max-width:860px){.layout{grid-template-columns:1fr}}

.crumbs{font-size:13px;color:var(--ink-soft);margin:16px 0}
.crumbs a{color:var(--ink-soft);border-bottom:1px solid var(--line)}

h1{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:clamp(24px,4vw,32px);margin-bottom:6px;letter-spacing:-.3px}
.lead{color:var(--ink-soft);font-size:14px;margin-bottom:24px}
h2{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:18px;margin:36px 0 14px;color:var(--ink)}
h3{font-family:'Space Grotesk',sans-serif;font-weight:500;font-size:14px;margin-bottom:8px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.03em}

/* Express converter card (used on homepage) */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.tabs{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px}
.tab{font-family:'Space Grotesk',sans-serif;font-size:13px;font-weight:500;padding:8px 16px;border-radius:20px;border:1px solid var(--line);background:var(--paper);cursor:pointer;color:var(--ink-soft)}
.tab.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.convert-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:16px;align-items:end}
@media (max-width:560px){.convert-grid{grid-template-columns:1fr}}
.field label{display:block;font-size:12px;color:var(--ink-soft);margin-bottom:6px;font-family:'JetBrains Mono',monospace}
.field input[type=number]{width:100%;font-family:'JetBrains Mono',monospace;font-size:19px;font-weight:600;padding:10px 12px;border:1px solid var(--line);border-radius:6px;background:var(--paper);color:var(--ink);margin-bottom:8px}
.field select{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:6px;background:var(--surface);font-size:13px;color:var(--ink);font-family:'Inter',sans-serif}
.swap{width:38px;height:38px;border-radius:50%;border:1px solid var(--line);background:var(--paper);display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--ink-soft);font-size:16px;margin-bottom:34px}
.swap:hover{border-color:var(--accent);color:var(--accent)}

/* Find-units box */
.find-box{background:var(--accent-soft);border-radius:var(--radius);padding:20px 22px;margin-top:28px}
.find-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:10px}
@media (max-width:560px){.find-grid{grid-template-columns:1fr}}
.find-grid input{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:6px;font-size:14px;background:var(--surface)}
.find-results{display:flex;flex-direction:column;gap:8px}
.find-result-item{display:block;background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:10px 14px;font-size:14px;color:var(--ink)}
.find-result-item:hover{border-color:var(--accent);color:var(--accent)}
.find-empty{font-size:13px;color:var(--ink-soft);padding:6px 2px}

/* Lists */
.common-list{list-style:none;font-size:14px;display:grid;grid-template-columns:1fr 1fr;gap:10px 16px}
@media (max-width:560px){.common-list{grid-template-columns:1fr}}
.common-list li{margin:0}

.directory{display:grid;grid-template-columns:1fr 1fr;gap:28px 40px}
@media (max-width:700px){.directory{grid-template-columns:1fr}}
.cat-block ul{list-style:none;font-size:13.5px}
.cat-block li{margin:0}

/* Rounded "card row" link list — used for Common Conversions, the
   converter directory, category pages (e.g. Other Converters), the
   "Convert X to Other Units" block, and the stub-page fallback list.
   A light rounded rectangle per link with a trailing chevron, stacked
   with a small gap; collapses to one column under 560px automatically
   via whichever grid/columns rule wraps it (see .common-list/.directory
   above) — the row style itself doesn't need its own breakpoint. */
.link-cards{list-style:none}
.link-cards li{margin-bottom:8px}
.link-cards li:last-child{margin-bottom:0}
.link-cards a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  background:#EEEFEA;border:1px solid var(--line);border-radius:8px;
  padding:12px 14px;font-size:14px;color:var(--ink);
}
.link-cards a::after{
  content:"\203A";color:var(--ink-soft);font-size:19px;line-height:1;
  flex-shrink:0;
}
.link-cards a:hover{border-color:var(--accent);background:var(--accent-soft)}
.link-cards a:hover::after{color:var(--accent)}

/* Sidebar */
aside{align-self:start}
.side-card{background:var(--ink);border-radius:var(--radius);padding:20px 18px;position:sticky;top:20px}

.nav-overlay{display:none}
@media (max-width:860px){
  aside{
    position:fixed;top:0;left:-320px;bottom:0;width:280px;max-width:85vw;
    z-index:101;padding:70px 16px 24px;overflow-y:auto;background:var(--ink);
    transition:left .22s ease;
  }
  .side-card{position:static}
  .ad-slot--sidebar{display:none}
  body.nav-open aside{left:0}
  .nav-overlay{
    display:block;position:fixed;inset:0;background:rgba(0,0,0,.45);
    opacity:0;pointer-events:none;transition:opacity .22s ease;z-index:100;
  }
  body.nav-open .nav-overlay{opacity:1;pointer-events:auto}
  body.nav-open{overflow:hidden}
}
.side-card h3{color:var(--accent);text-transform:none;font-size:14px;margin-bottom:12px;letter-spacing:0}
.side-card ul{list-style:none}
.side-card li{margin-bottom:9px}
.side-card a{color:#EDEEE9;font-size:13.5px}
.side-card a:hover{color:var(--accent)}

/* Conversion instrument (single-page converter) */
.instrument{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px 24px;margin-bottom:36px}
.rows{display:flex;flex-direction:column;gap:18px}
.row{display:flex;align-items:center;gap:14px}
.row label{width:96px;flex-shrink:0;font-family:'Space Grotesk',sans-serif;font-weight:500;font-size:14px}
.row.a label{color:var(--unit-a)}
.row.b label{color:var(--unit-b)}
.row input{flex:1;font-family:'JetBrains Mono',monospace;font-size:22px;font-weight:600;padding:11px 14px;border:1px solid var(--line);border-radius:6px;background:var(--paper);color:var(--ink);width:100%}
.row input:focus{outline:2px solid var(--accent);outline-offset:1px}

.ruler-wrap{margin-top:26px;padding-top:22px;border-top:1px dashed var(--line)}
.ruler-label{font-size:12px;color:var(--ink-soft);margin-bottom:10px;font-family:'JetBrains Mono',monospace}

.realworld-note{margin-top:14px;padding:10px 14px;background:var(--accent-soft);border-radius:8px;font-size:13.5px;color:var(--ink);font-style:italic}
svg{display:block;width:100%;height:auto}
.tick{stroke:var(--line);stroke-width:1}
.tick.major{stroke:var(--ink-soft)}
.scale-text{font-family:'JetBrains Mono',monospace;font-size:10px;fill:var(--ink-soft)}
.marker-line{stroke:var(--accent);stroke-width:2}
.marker-dot{fill:var(--accent)}

@media (max-width:640px){table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}}
table{width:100%;border-collapse:collapse;margin-bottom:36px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
th,td{padding:11px 16px;text-align:left;font-size:14px}
th{background:var(--paper);font-family:'Space Grotesk',sans-serif;font-weight:500;font-size:13px;color:var(--ink-soft);border-bottom:1px solid var(--line)}
td{font-family:'JetBrains Mono',monospace;border-bottom:1px solid var(--line)}
tr:last-child td{border-bottom:none}
tr.highlight td{background:var(--accent-soft)}

.formula{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin-bottom:36px}
.formula code{display:block;font-family:'JetBrains Mono',monospace;font-size:15px;background:var(--paper);padding:12px 14px;border-radius:6px;margin-top:10px}

.related{display:flex;flex-wrap:wrap;gap:10px}
.related a{font-size:13px;color:var(--ink);text-decoration:none;border:1px solid var(--line);padding:8px 14px;border-radius:20px;background:var(--surface)}
.related a:hover{border-color:var(--accent);color:var(--accent)}

.share-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:18px}
.share-icon{width:34px!important;height:34px!important;min-width:34px!important;min-height:34px!important;max-width:34px!important;max-height:34px!important;flex:0 0 34px!important;border-radius:50%;display:inline-flex!important;align-items:center;justify-content:center;overflow:hidden;box-sizing:border-box;transition:transform .15s ease,opacity .15s ease}
.share-icon:hover{transform:translateY(-2px);opacity:.9}
.share-icon svg{width:17px!important;height:17px!important;max-width:17px!important;max-height:17px!important;display:block!important}

footer{border-top:1px solid var(--line);padding:20px;text-align:center;font-size:12px;color:var(--ink-soft)}
footer a{color:var(--ink-soft);border-bottom:1px solid var(--line)}

/* --- Page header row (title + calculator toggle) --- */
.page-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.calc-icon-btn{
  width:38px;height:38px;border-radius:8px;border:1px solid var(--line);background:var(--surface);
  display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;margin-top:2px;
}
.calc-icon-btn:hover{border-color:var(--accent)}
.calc-icon-btn svg{width:18px;height:18px;stroke:var(--ink-soft)}
.calc-icon-btn:hover svg{stroke:var(--accent)}

/* --- Floating scientific calculator --- */
.calc-panel{
  position:fixed;top:90px;left:20px;z-index:200;width:300px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:0 12px 32px rgba(21,34,56,.18);
  display:none;
}
.calc-panel.open{display:block}
.calc-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 12px;border-bottom:1px solid var(--line);
}
.calc-mode-toggle{display:flex;gap:6px}
.calc-mode-btn{
  font-family:'Space Grotesk',sans-serif;font-size:11px;font-weight:500;
  padding:4px 10px;border-radius:14px;border:1px solid var(--line);background:var(--paper);
  cursor:pointer;color:var(--ink-soft);
}
.calc-mode-btn.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.calc-close{
  width:22px;height:22px;border-radius:50%;background:#C0392B;color:#fff;border:none;
  font-size:13px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;
}
.calc-close:hover{background:#A93226}
.calc-display{
  font-family:'JetBrains Mono',monospace;font-size:24px;font-weight:600;text-align:right;
  padding:14px 14px;background:var(--ink);color:#fff;overflow-x:auto;white-space:nowrap;
}
.calc-angle-row{display:flex;align-items:center;gap:10px;padding:8px 12px;font-size:11px;color:var(--ink-soft);border-bottom:1px solid var(--line)}
.calc-angle-row label{display:flex;align-items:center;gap:4px;cursor:pointer}
.calc-sci-row{
  display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);
}
.calc-grid{
  display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);
}
.calc-btn{
  background:var(--surface);border:none;padding:11px 0;font-size:13px;
  font-family:'JetBrains Mono',monospace;cursor:pointer;color:var(--ink);
}
.calc-btn:hover{background:var(--paper)}
.calc-btn.op{color:var(--accent);font-weight:600}
.calc-btn.eq{background:var(--ink);color:#fff;font-weight:600}
.calc-btn.eq:hover{background:#1f3252}
.calc-btn.use{background:#C0392B;color:#fff;font-weight:600}
.calc-btn.use:hover{background:#A93226}
.calc-btn.wide{grid-column:span 2}

/* --- Accordion sidebar (All Converters) --- */
.accordion{background:var(--ink);border-radius:var(--radius);overflow:hidden}
.acc-item + .acc-item{border-top:1px solid rgba(255,255,255,.08)}
.acc-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 16px;cursor:pointer;color:#fff;font-family:'Space Grotesk',sans-serif;font-size:13.5px;font-weight:500;
}
.acc-header:hover{color:var(--accent)}
.acc-header .arrow{transition:transform .15s ease;font-size:10px;color:var(--accent)}
.acc-item.open .acc-header .arrow{transform:rotate(180deg)}
.acc-item.leaf .acc-header .arrow{display:none}
.acc-body{max-height:0;overflow:hidden;transition:max-height .2s ease}
.acc-item.open .acc-body{max-height:600px}
.acc-body-inner{padding:4px 16px 14px;columns:2;column-gap:14px}
.acc-body-inner a{
  display:block;color:#D9DCE6;font-size:12.5px;padding:4px 0;break-inside:avoid;
}
.acc-body-inner a:hover{color:var(--accent)}

/* --- Unit definition blocks (SEO content on pair pages) --- */
.unit-info{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin-bottom:20px}
.unit-info h3{color:var(--ink);text-transform:none;font-size:16px;letter-spacing:0;margin-bottom:10px}
.unit-info p{font-size:13.5px;color:var(--ink-soft);margin-bottom:8px}
.unit-info p:last-child{margin-bottom:0}
.unit-info b{color:var(--ink)}

/* --- Ad slots (reserved placeholders, no network wired up yet) --- */
.ad-slot{
  display:flex;align-items:center;justify-content:center;
  border:1px dashed var(--line);border-radius:8px;background:var(--surface);
  color:var(--ink-soft);font-size:11px;letter-spacing:.04em;text-transform:uppercase;
  font-family:'Space Grotesk',sans-serif;margin:28px 0;
}
.ad-slot--leaderboard{min-height:90px}
.ad-slot--incontent{min-height:100px}
.ad-slot--sidebar{min-height:250px}

/* --- Full category converter (hub) page --- */
.hub-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:560px){.hub-grid{grid-template-columns:1fr}}
.hub-grid select{
  width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:6px;
  background:var(--paper);font-size:14px;color:var(--ink);font-family:'Inter',sans-serif;
}
.hub-grid input[type=number]{
  width:100%;font-family:'JetBrains Mono',monospace;font-size:19px;font-weight:600;
  padding:10px 12px;border:1px solid var(--line);border-radius:6px;background:var(--paper);
  color:var(--ink);margin-bottom:8px;
}
.complete-list{list-style:none;font-size:13.5px}
.complete-list li{padding:9px 0;border-bottom:1px solid var(--line);display:flex;flex-wrap:wrap;gap:6px 14px;align-items:baseline}
.complete-list li:last-child{border-bottom:none}
.complete-list .eq{color:var(--ink-soft);font-family:'JetBrains Mono',monospace;font-size:12.5px;margin-right:8px}
.complete-list a{font-size:12px;color:var(--accent);border-bottom:1px solid transparent}
.complete-list a:hover{border-color:var(--accent)}

/* --- Simple hub/category listing page --- */
.hub-list{list-style:none;font-size:14.5px}
.hub-list li{margin-bottom:10px}
.hub-list a{border-bottom:1px solid var(--line)}
.hub-list a:hover{border-color:var(--accent)}
.stub-note{background:var(--accent-soft);border-radius:var(--radius);padding:16px 20px;font-size:13.5px;color:var(--ink)}

/* --- Case converter --- */
.case-textarea{
  width:100%;min-height:180px;padding:14px;border:1px solid var(--line);border-radius:8px;
  background:var(--paper);color:var(--ink);font-family:'Inter',sans-serif;font-size:14px;
  resize:vertical;margin-bottom:14px;
}
.case-buttons{display:flex;flex-wrap:wrap;gap:8px}
.case-buttons button{
  font-family:'Space Grotesk',sans-serif;font-size:12.5px;font-weight:500;
  padding:9px 16px;border-radius:6px;border:1px solid var(--ink);background:var(--ink);color:#fff;cursor:pointer;
}
.case-buttons button:hover{background:#1f3252}

/* --- Kaomoji picker --- */
.kaomoji-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px;margin-bottom:32px}
.kaomoji-item{
  font-family:'JetBrains Mono',monospace;font-size:15px;
  padding:14px 8px;border-radius:8px;border:1px solid var(--line);background:var(--surface);
  cursor:pointer;text-align:center;transition:border-color .15s ease,background .15s ease;
}
.kaomoji-item:hover{border-color:var(--accent);background:var(--accent-soft)}

/* --- Numbers (base) converter --- */
.num-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
@media (max-width:560px){.num-grid{grid-template-columns:1fr}}
.num-grid input[type=text]{
  width:100%;font-family:'JetBrains Mono',monospace;font-size:17px;font-weight:600;
  padding:10px 12px;border:1px solid var(--line);border-radius:6px;background:var(--paper);
  color:var(--ink);margin-bottom:8px;
}
.num-error{color:#C0392B;font-size:12.5px;margin-top:-4px;margin-bottom:8px;display:none}

/* --- Currency converter --- */
.currency-note{background:var(--accent-soft);border-radius:8px;padding:12px 16px;font-size:12.5px;color:var(--ink);margin-bottom:16px}
.currency-note.error{background:#F8D7D3}
.currency-list{max-height:340px;overflow-y:auto;list-style:none;font-size:13px;border:1px solid var(--line);border-radius:8px}
.currency-list li{padding:8px 14px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;font-family:'JetBrains Mono',monospace}
.currency-list li:last-child{border-bottom:none}
.currency-list li span:first-child{font-family:'Inter',sans-serif}