:root{
  --bg:#f4f7fb;--surface:#fff;--surface2:#eef3fb;--text:#101828;--muted:#667085;
  --line:#dce4ef;--primary:#1769ff;--primary2:#00a7ff;--navy:#0b1630;
  --warning:#f2b705;--shadow:0 16px 45px rgba(17,32,62,.1);--radius:20px;
}
html[data-theme="dark"]{
  --bg:#09101f;--surface:#111a2d;--surface2:#17233a;--text:#f7f9fc;--muted:#a8b3c7;
  --line:#273650;--navy:#061023;--shadow:0 18px 50px rgba(0,0,0,.3);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}
a{color:inherit}button,input,select{font:inherit}button{cursor:pointer}
.container{max-width:1180px;margin:auto;padding:0 22px}
.topbar{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--surface) 90%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{height:74px;display:flex;align-items:center;gap:20px}
.wordmark{display:flex;align-items:center;text-decoration:none;font-size:28px;font-weight:900;letter-spacing:-1.2px;white-space:nowrap}
.mark{width:31px;height:31px;border-radius:9px;background:linear-gradient(145deg,var(--primary2),var(--primary));margin-right:9px;position:relative;box-shadow:inset 0 0 0 5px rgba(255,255,255,.15)}
.mark:after{content:"";position:absolute;width:11px;height:11px;background:var(--surface);border-radius:4px;right:5px;top:5px}
.blue{color:var(--primary)}
.navlinks{display:flex;gap:18px;margin-left:15px}
.navlinks a{text-decoration:none;color:var(--muted);font-weight:700}
.nav-actions{margin-left:auto;display:flex;gap:9px}
.icon-btn{min-width:42px;height:42px;padding:0 11px;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:12px;font-weight:800}
.hero{background:radial-gradient(circle at 80% 20%,rgba(0,167,255,.28),transparent 28%),linear-gradient(145deg,#071126,#15346d);color:#fff;padding:78px 0 88px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:45px;align-items:center}
.eyebrow{display:inline-flex;padding:8px 12px;border:1px solid rgba(255,255,255,.18);border-radius:999px;background:rgba(255,255,255,.07);font-weight:700;color:#d7e6ff}
.hero h1{font-size:clamp(48px,7vw,82px);line-height:1;letter-spacing:-4px;margin:22px 0}
.hero p{font-size:20px;line-height:1.65;color:#c7d4eb;max-width:700px}
.hero-search{display:flex;background:#fff;border-radius:17px;padding:7px;max-width:680px;margin-top:28px;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.hero-search input{border:0;outline:0;flex:1;padding:13px 15px;font-size:17px;min-width:0}
.hero-search button{border:0;border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;font-weight:800;padding:0 22px}
.hero-logo{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.14);border-radius:28px;padding:24px}
.hero-logo img{width:100%;display:block;border-radius:16px;background:#fff}
.section{padding:58px 0 0}
.section-head{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:22px}
.section h2{font-size:34px;letter-spacing:-1px;margin:0}.lead{color:var(--muted);margin:7px 0 0}
.chips{display:flex;gap:9px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:var(--surface);color:var(--muted);border-radius:999px;padding:10px 15px;font-weight:750}
.chip.active,.chip:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:21px;min-height:220px;display:flex;flex-direction:column;box-shadow:0 6px 22px rgba(17,32,62,.05);transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.card.bookmarked{border-color:var(--warning)}
.card-icon{width:48px;height:48px;border-radius:15px;background:var(--surface2);display:grid;place-items:center;font-size:25px}
.card h3{font-size:20px;margin:16px 0 7px}.card p{color:var(--muted);line-height:1.5;margin:0 0 18px}
.card-link{margin-top:auto;text-decoration:none;text-align:center;border-radius:11px;background:var(--navy);color:#fff;padding:11px 14px;font-weight:800}
.favorite{position:absolute;right:16px;top:16px;width:39px;height:39px;border:1px solid var(--line);background:var(--surface);color:#98a2b3;border-radius:50%;font-size:23px}
.favorite.active{color:var(--warning);border-color:var(--warning);background:#fff8d6}
.footer{margin-top:70px;border-top:1px solid var(--line);padding:34px 0;color:var(--muted)}
.footer-row{display:flex;justify-content:space-between;align-items:center;gap:20px}
.language-overlay{position:fixed;inset:0;z-index:9999;display:none;place-items:center;padding:20px;background:rgba(5,12,28,.58);backdrop-filter:blur(10px)}
.language-overlay.show{display:grid}.language-box{width:min(440px,100%);padding:30px;border:1px solid rgba(255,255,255,.22);border-radius:26px;background:color-mix(in srgb,var(--surface) 90%,transparent);box-shadow:0 30px 100px rgba(0,0,0,.38);text-align:center}
.language-options{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}.language-options button{border:1px solid var(--line);border-radius:16px;background:var(--surface);color:var(--text);padding:18px;font-weight:850}
.calc-wrap{padding:50px 0}
.breadcrumbs{color:var(--muted);font-size:14px;margin-bottom:18px}.breadcrumbs a{text-decoration:none}
.calc-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:22px}
.calc-panel,.info-panel{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:26px;box-shadow:var(--shadow)}
.calc-panel h1{font-size:38px;letter-spacing:-1px;margin:0 0 8px}.calc-panel>p{color:var(--muted)}
.field{margin-bottom:15px}.field label{display:block;font-weight:750;margin-bottom:7px}.field input,.field select{width:100%;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:12px;padding:13px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}.actions{display:flex;gap:10px;margin-top:18px}.actions button{flex:1;padding:13px;border:0;border-radius:12px;font-weight:850}.primary{background:var(--primary);color:#fff}.secondary{background:var(--surface2);color:var(--text)}
.result{margin-top:18px;padding:18px;border-radius:14px;background:color-mix(in srgb,var(--primary) 8%,var(--surface));border:1px solid color-mix(in srgb,var(--primary) 28%,var(--line));line-height:1.9}.result strong{color:var(--primary)}
.formula{margin-top:13px;color:var(--muted);font-size:14px}.info-panel h2{margin-top:0}.info-panel p,.info-panel li{color:var(--muted);line-height:1.6}
@media(max-width:920px){.hero-grid,.calc-layout{grid-template-columns:1fr}.hero-logo{display:none}.grid{grid-template-columns:repeat(2,1fr)}.navlinks{display:none}}
@media(max-width:620px){.grid,.row{grid-template-columns:1fr}.hero h1{letter-spacing:-2px}.hero-search{flex-direction:column;background:transparent;padding:0;gap:9px}.hero-search input,.hero-search button{padding:15px;border-radius:13px}.section-head,.footer-row{align-items:stretch;flex-direction:column}.language-options{grid-template-columns:1fr}}




/* Home dashboard blocks — Reckono v1.0.1 */
.home-panels{padding-top:58px}
.split-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;align-items:stretch}
.panel{min-height:230px;background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:26px;box-shadow:0 12px 34px rgba(17,32,62,.07)}
.panel h2{font-size:34px;line-height:1.15;letter-spacing:-1px;margin:0}
.panel-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:18px}
.panel-heading .chip{flex:0 0 auto}
.list-stack{display:grid;gap:10px;margin-top:20px}
.list-item{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:13px 14px;border:1px solid var(--line);border-radius:13px;background:var(--surface2)}
.list-item small{display:block;color:var(--muted);margin-top:4px}
.list-item .item-action{border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:999px;padding:8px 13px;font-weight:750;text-decoration:none;white-space:nowrap}
.why-section{padding-top:64px}
.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.feature-card{min-height:220px;background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:23px;box-shadow:0 8px 26px rgba(17,32,62,.05);transition:transform .2s ease,box-shadow .2s ease}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.feature-card .card-icon{width:48px;height:48px}
.feature-card h3{margin:17px 0 8px;font-size:20px;line-height:1.25}
.feature-card p{margin:0;color:var(--muted);line-height:1.6}
@media(max-width:920px){.split-grid{grid-template-columns:1fr}.feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){.feature-grid{grid-template-columns:1fr}.panel-heading{align-items:stretch;flex-direction:column}.panel{min-height:0}.feature-card{min-height:0}}


.bookmark-jump-btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.bookmark-jump-btn .bookmark-count{
  display:none;
  min-width:17px;
  height:17px;
  padding:0 4px;
  border-radius:999px;
  background:var(--primary);
  color:#fff;
  font-size:11px;
  line-height:17px;
  text-align:center;
}
.bookmark-jump-btn.has-bookmarks .bookmark-count{display:inline-block}
.bookmark-jump-btn:active{transform:translateY(1px)}


.bookmark-target-highlight{
  outline:3px solid color-mix(in srgb,var(--primary) 38%,transparent);
  outline-offset:5px;
  transition:outline-color .9s ease;
}

#headerBookmarksBtn{position:relative;z-index:100;pointer-events:auto!important;cursor:pointer!important;display:inline-flex;align-items:center;justify-content:center;gap:4px}
#headerBookmarkCount{display:none;align-items:center;justify-content:center;min-width:17px;height:17px;padding:0 4px;border-radius:999px;background:var(--primary);color:#fff;font-size:11px;line-height:1}
.bookmark-target-highlight{outline:3px solid color-mix(in srgb,var(--primary) 42%,transparent);outline-offset:5px}

.language-modal-logo,.modal-logo{max-width:180px!important;height:auto!important;margin-bottom:12px!important;}

/* Reckono v1.1 */
.language-box .wordmark{font-size:23px;letter-spacing:-.8px;margin-bottom:14px}
.language-box .wordmark .mark{width:27px;height:27px}
.language-box h2{margin:0 0 20px}
.language-options button{font-size:16px}

.calc-panel textarea{width:100%;min-height:130px;resize:vertical;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:12px;padding:13px}
.api-status{margin:10px 0;color:var(--muted);font-size:14px}
.api-status.error{color:#b42318}
.api-status.success{color:#067647}


.how-to-use{
  margin-top:24px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:18px;
  padding:24px;
  box-shadow:0 6px 22px rgba(17,32,62,.05);
}
.how-to-use h2{margin:0 0 14px;font-size:24px}
.how-to-use ol{margin:0;padding-left:22px;display:grid;gap:9px;line-height:1.55}
.how-to-use .how-tip{margin:18px 0 0;padding:13px 15px;border-radius:12px;background:var(--surface2);color:var(--muted);line-height:1.5}