/* =========================================================
   Crictron Calculators — design system
   Display: Sora | Body: Inter | Readouts: JetBrains Mono
   ========================================================= */

:root{
  --ink:        #16203D;
  --ink-soft:   #5B6478;
  --bg:         #F7F8FA;
  --surface:    #FFFFFF;
  --border:     #E4E7EF;
  --teal:       #00B8A9;
  --teal-dark:  #00968A;
  --amber:      #FF8A3D;
  --readout-bg: #101826;
  --readout-fg: #6BFFCB;
  --radius:     14px;
  --shadow:     0 2px 10px rgba(22,32,61,0.06);
  --shadow-lg:  0 12px 32px rgba(22,32,61,0.10);
  --max:        1120px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'Inter',system-ui,-apple-system,Segoe UI,sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:'Sora',system-ui,sans-serif;
  color:var(--ink);
  line-height:1.2;
  margin:0 0 .5em;
}
a{color:var(--teal-dark);text-decoration:none;}
a:hover{text-decoration:underline;}
.container{max-width:var(--max);margin:0 auto;padding:0 20px;}
img{max-width:100%;display:block;}

/* ---------- Skip link / a11y ---------- */
.skip-link{
  position:absolute;left:-999px;top:auto;
  background:var(--ink);color:#fff;padding:10px 16px;border-radius:8px;z-index:999;
}
.skip-link:focus{left:16px;top:16px;}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px;}

/* ---------- Header ---------- */
.site-header{
  background:var(--surface);
  border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:50;
}
.nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 0;
}
.brand{
  display:flex;align-items:center;gap:10px;
  font-family:'Sora',sans-serif;font-weight:700;font-size:1.25rem;color:var(--ink);
}
.brand-mark{
  width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--teal),var(--ink));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-family:'JetBrains Mono',monospace;font-weight:700;font-size:.95rem;
}
.brand:hover{text-decoration:none;}
.nav-links{display:flex;gap:22px;list-style:none;margin:0;padding:0;align-items:center;}
.nav-links a{color:var(--ink);font-weight:600;font-size:.95rem;}
.nav-links a:hover{color:var(--teal-dark);text-decoration:none;}
.nav-toggle{display:none;background:none;border:none;font-size:1.6rem;cursor:pointer;color:var(--ink);}

@media (max-width:760px){
  .nav-toggle{display:block;}
  .nav-links{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:var(--surface);border-bottom:1px solid var(--border);
    flex-direction:column;align-items:flex-start;padding:14px 20px;gap:14px;
  }
  .nav-links.open{display:flex;}
}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:.85rem;color:var(--ink-soft);margin:16px 0 0;}
.breadcrumb a{color:var(--ink-soft);}
.breadcrumb a:hover{color:var(--teal-dark);}

/* ---------- Hero ---------- */
.hero{padding:48px 0 32px;}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;}
@media (max-width:860px){.hero-grid{grid-template-columns:1fr;}}
.eyebrow{
  display:inline-block;font-family:'JetBrains Mono',monospace;font-size:.78rem;
  letter-spacing:.06em;color:var(--teal-dark);background:#E6FBF8;
  padding:4px 10px;border-radius:20px;margin-bottom:14px;text-transform:uppercase;
}
.hero h1{font-size:2.4rem;max-width:16ch;}
.hero p.lead{color:var(--ink-soft);font-size:1.08rem;max-width:46ch;}

/* ---------- Readout (signature element) ---------- */
.readout{
  background:var(--readout-bg);
  color:var(--readout-fg);
  font-family:'JetBrains Mono',monospace;
  border-radius:10px;
  padding:18px 20px;
  font-size:1.6rem;
  overflow-x:auto;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.05);
}
.readout .label{
  display:block;font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;
  color:#8FA3B8;margin-bottom:4px;
}
.readout .sub{font-size:.95rem;color:#9FE9D6;display:block;margin-top:6px;}

/* ---------- Mini live demo card in hero ---------- */
.demo-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-lg);padding:22px;
}
.demo-card h2{font-size:1.05rem;margin-bottom:14px;}
.field-row{display:flex;gap:10px;margin-bottom:12px;flex-wrap:wrap;}
.field{flex:1;min-width:120px;}
label{display:block;font-size:.82rem;font-weight:600;color:var(--ink-soft);margin-bottom:6px;}
input[type=number],input[type=text],input[type=date],select{
  width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;
  font-size:1rem;font-family:'Inter',sans-serif;background:#fff;color:var(--ink);
}
input:focus,select:focus{border-color:var(--teal);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--teal);color:#fff;border:none;border-radius:9px;
  padding:11px 20px;font-weight:700;font-size:.96rem;cursor:pointer;
  font-family:'Inter',sans-serif;transition:transform .06s ease,background .15s ease;
}
.btn:hover{background:var(--teal-dark);text-decoration:none;}
.btn:active{transform:scale(.98);}
.btn-secondary{background:var(--ink);}
.btn-secondary:hover{background:#0e1730;}
.btn-block{width:100%;}

/* ---------- Sections ---------- */
section{padding:44px 0;}
section.tight{padding:24px 0;}
.section-title{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin-bottom:20px;flex-wrap:wrap;}
.section-title h2{font-size:1.5rem;margin:0;}
.section-title .more{font-size:.9rem;font-weight:600;}

/* ---------- Cards / grids ---------- */
.grid{display:grid;gap:18px;}
.grid-4{grid-template-columns:repeat(4,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}
@media (max-width:900px){.grid-4{grid-template-columns:repeat(2,1fr);}.grid-3{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr;}}

.tool-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);transition:transform .12s ease, box-shadow .12s ease;
  display:flex;flex-direction:column;gap:8px;
}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);text-decoration:none;}
.tool-card .tag{
  font-family:'JetBrains Mono',monospace;font-size:.68rem;color:var(--teal-dark);
  text-transform:uppercase;letter-spacing:.05em;
}
.tool-card h3{font-size:1.05rem;margin:2px 0;color:var(--ink);}
.tool-card p{color:var(--ink-soft);font-size:.88rem;margin:0;}

/* ---------- Calculator panel (tool pages) ---------- */
.calc-wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:start;}
@media (max-width:900px){.calc-wrap{grid-template-columns:1fr;}}
.panel{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);
}
.panel h1{font-size:1.7rem;}
.result-box{margin-top:18px;}
.help-text{font-size:.82rem;color:var(--ink-soft);margin-top:4px;}
.aside .panel{position:sticky;top:88px;}

/* ---------- Content / article ---------- */
.prose{max-width:74ch;color:var(--ink);}
.prose h2{font-size:1.3rem;margin-top:1.6em;}
.prose h3{font-size:1.08rem;margin-top:1.3em;}
.prose p{color:var(--ink-soft);}
.prose ul,.prose ol{color:var(--ink-soft);}
.faq dt{font-weight:700;color:var(--ink);margin-top:16px;font-family:'Sora',sans-serif;font-size:1rem;}
.faq dd{margin:6px 0 0;color:var(--ink-soft);}

/* ---------- Disclaimer / notice ---------- */
.notice{
  background:#FFF5EC;border:1px solid #FFE1C2;color:#8a5a24;
  border-radius:10px;padding:12px 16px;font-size:.85rem;margin-top:16px;
}

/* ---------- Related tools chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  background:#EEF1F8;color:var(--ink);border-radius:20px;padding:6px 14px;
  font-size:.82rem;font-weight:600;
}
.chip:hover{background:var(--teal);color:#fff;text-decoration:none;}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#C7CEE0;margin-top:60px;padding:44px 0 24px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px;}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr 1fr;}}
.site-footer h4{color:#fff;font-size:.9rem;margin-bottom:12px;}
.site-footer ul{list-style:none;margin:0;padding:0;}
.site-footer li{margin-bottom:8px;}
.site-footer a{color:#AEB8D0;font-size:.88rem;}
.site-footer a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);margin-top:32px;padding-top:18px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.8rem;color:#8592AE;
}

/* ---------- Utility ---------- */
.text-center{text-align:center;}
.mt-0{margin-top:0;}
.small{font-size:.85rem;color:var(--ink-soft);}
table{width:100%;border-collapse:collapse;font-size:.9rem;}
th,td{padding:8px 10px;border-bottom:1px solid var(--border);text-align:left;}
th{font-family:'Sora',sans-serif;color:var(--ink-soft);font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;}
.scroll-x{overflow-x:auto;}