/* ==========================================================================
   KongaShare.art — Design System
   Signature: the "pulse line" (ECG-style trace) marks every threshold moment —
   nav divider, hero, and the reveal of a calculated result.
   ========================================================================== */

:root{
  /* Color */
  --bg:        #F2F6F5;
  --bg-alt:    #E4EDEA;
  --card:      #FFFFFF;
  --ink:       #12211F;
  --ink-soft:  #47605C;
  --navy:      #0F2A3D;
  --navy-soft: #1C3E52;
  --teal:      #1B7F79;
  --teal-dark: #145F5B;
  --coral:     #FF6B5B;
  --coral-dark:#E1503F;
  --line:      #C9D8D4;
  --line-dark: rgba(255,255,255,0.16);

  /* Type */
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Source Serif 4", Georgia, serif;
  --font-mono: "IBM Plex Mono", monospace;

  /* Layout */
  --maxw: 1120px;
  --radius: 14px;
  --radius-sm: 8px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--teal-dark);text-decoration:none;}
a:hover{text-decoration:underline;}
h1,h2,h3,h4{
  font-family:var(--font-display);
  color:var(--navy);
  line-height:1.15;
  margin:0 0 .5em;
  letter-spacing:-0.01em;
}
h1{font-size:clamp(2.1rem,4.5vw,3.2rem);}
h2{font-size:clamp(1.5rem,2.6vw,2rem);}
h3{font-size:1.2rem;}
p{margin:0 0 1em;}
.eyebrow{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--teal-dark);
  display:inline-flex;
  align-items:center;
  gap:.5em;
  margin-bottom:.6em;
}
.eyebrow::before{
  content:"";
  width:7px;height:7px;border-radius:50%;
  background:var(--coral);
  box-shadow:0 0 0 3px rgba(255,107,91,.18);
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
:focus-visible{outline:3px solid var(--coral);outline-offset:2px;border-radius:4px;}

/* -------------------- Pulse line (signature element) -------------------- */
.pulse-line{
  height:22px;
  width:100%;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='22' viewBox='0 0 220 22'%3E%3Cpolyline points='0,11 40,11 50,3 60,19 70,11 90,11 100,1 112,21 122,11 220,11' fill='none' stroke='%231B7F79' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:repeat-x;
  background-size:220px 22px;
  opacity:.55;
}
.pulse-line.on-dark{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='22' viewBox='0 0 220 22'%3E%3Cpolyline points='0,11 40,11 50,3 60,19 70,11 90,11 100,1 112,21 122,11 220,11' fill='none' stroke='%23FF6B5B' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  opacity:.65;
}
.pulse-line.animate{
  animation:pulseSweep 2.4s linear infinite;
}
@keyframes pulseSweep{
  from{background-position-x:0;}
  to{background-position-x:220px;}
}
@media (prefers-reduced-motion:reduce){
  .pulse-line.animate{animation:none;}
}

/* -------------------- Header / nav -------------------- */
header.site{
  background:var(--navy);
  color:#fff;
}
.nav-row{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 24px;
  max-width:var(--maxw);margin:0 auto;
  gap:20px;
}
.brand{
  font-family:var(--font-display);
  font-weight:600;
  font-size:1.25rem;
  color:#fff;
  display:flex;align-items:baseline;gap:.35em;
}
.brand span{color:var(--coral);}
nav.primary ul{
  display:flex;gap:22px;list-style:none;margin:0;padding:0;flex-wrap:wrap;
}
nav.primary a{
  color:#D9E8E4;font-family:var(--font-mono);font-size:.82rem;
  letter-spacing:.03em;text-decoration:none;
}
nav.primary a:hover, nav.primary a.active{color:var(--coral);text-decoration:none;}
.nav-toggle{display:none;background:none;border:1px solid var(--line-dark);color:#fff;border-radius:8px;padding:8px 10px;font-family:var(--font-mono);}
@media (max-width:760px){
  nav.primary{width:100%;display:none;}
  nav.primary.open{display:block;}
  nav.primary ul{flex-direction:column;gap:14px;padding:16px 0 6px;}
  .nav-toggle{display:inline-block;}
  .nav-row{flex-wrap:wrap;}
}

/* -------------------- Hero -------------------- */
.hero{
  background:var(--navy);
  color:#fff;
  padding:56px 0 64px;
}
.hero-grid{
  display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center;
}
@media (max-width:860px){.hero-grid{grid-template-columns:1fr;}}
.hero h1{color:#fff;}
.hero p.lead{color:#C9DAD5;font-size:1.1rem;max-width:480px;}
.hero-actions{display:flex;gap:14px;margin-top:22px;flex-wrap:wrap;}

/* -------------------- Buttons -------------------- */
.btn{
  display:inline-flex;align-items:center;gap:.5em;
  font-family:var(--font-mono);font-size:.85rem;letter-spacing:.02em;
  padding:12px 20px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;transition:transform .15s ease, background .15s ease;
}
.btn:hover{transform:translateY(-1px);}
.btn-primary{background:var(--coral);color:#12130f;}
.btn-primary:hover{background:var(--coral-dark);}
.btn-ghost{background:transparent;border-color:var(--line-dark);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.08);}
.btn-solid{background:var(--teal);color:#fff;}
.btn-solid:hover{background:var(--teal-dark);}

/* -------------------- Cards / grids -------------------- */
.section{padding:64px 0;}
.section.alt{background:var(--bg-alt);}
.tool-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:20px;margin-top:28px;
}
.tool-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;transition:box-shadow .18s ease, transform .18s ease;
}
.tool-card:hover{box-shadow:0 12px 28px rgba(15,42,61,.08);transform:translateY(-2px);}
.tool-card .tag{font-family:var(--font-mono);font-size:.68rem;color:var(--teal-dark);letter-spacing:.08em;text-transform:uppercase;}
.tool-card h3{margin-top:.3em;}
.tool-card a.card-link{display:inline-block;margin-top:10px;font-family:var(--font-mono);font-size:.82rem;}

.three-col{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
@media (max-width:760px){.three-col{grid-template-columns:1fr;}}

/* -------------------- Tool page hero visual -------------------- */
.tool-header-grid{
  display:grid;grid-template-columns:1fr 200px;gap:32px;align-items:center;
}
@media (max-width:700px){.tool-header-grid{grid-template-columns:1fr;}}
.tool-visual{
  background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;display:flex;align-items:center;justify-content:center;
}
.tool-visual img{width:100%;max-width:170px;height:auto;}

/* -------------------- Calculator card -------------------- */
.calc-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:start;}
@media (max-width:860px){.calc-wrap{grid-template-columns:1fr;}}
.calc-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;position:relative;overflow:hidden;
}
.calc-card .pulse-line{position:absolute;top:0;left:0;}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px;}
@media (max-width:480px){.field-row{grid-template-columns:1fr;}}
label{
  display:block;font-family:var(--font-mono);font-size:.72rem;
  letter-spacing:.05em;text-transform:uppercase;color:var(--ink-soft);margin-bottom:6px;
}
input[type=number], select{
  width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:var(--radius-sm);
  font-family:var(--font-body);font-size:1rem;background:#fff;color:var(--ink);
}
input[type=number]:focus, select:focus{border-color:var(--teal);}
.unit-toggle{display:flex;gap:8px;margin-bottom:18px;}
.unit-toggle button{
  flex:1;padding:9px;border-radius:var(--radius-sm);border:1px solid var(--line);
  background:#fff;font-family:var(--font-mono);font-size:.78rem;cursor:pointer;
}
.unit-toggle button.active{background:var(--teal);color:#fff;border-color:var(--teal);}

.result-box{
  margin-top:20px;padding:20px;border-radius:var(--radius-sm);
  background:var(--bg-alt);border-left:4px solid var(--coral);
  opacity:0;transform:translateY(6px);transition:opacity .35s ease, transform .35s ease;
}
.result-box.show{opacity:1;transform:translateY(0);}
.result-box .big{
  font-family:var(--font-mono);font-size:2.1rem;color:var(--navy);font-weight:600;
}
.result-box .category{font-family:var(--font-mono);font-size:.85rem;color:var(--teal-dark);letter-spacing:.03em;}
.result-note{font-size:.88rem;color:var(--ink-soft);margin-top:10px;}

.side-panel{
  background:var(--bg-alt);border-radius:var(--radius);padding:24px;
  font-size:.94rem;
}
.side-panel h3{font-size:1rem;}
.range-table{width:100%;border-collapse:collapse;font-family:var(--font-mono);font-size:.82rem;margin-top:8px;}
.range-table td, .range-table th{padding:7px 6px;border-bottom:1px solid var(--line);text-align:left;}

/* -------------------- Article -------------------- */
.article{max-width:720px;}
.article h2{margin-top:1.6em;}
.faq-item{border-bottom:1px solid var(--line);padding:14px 0;}
.faq-item summary{cursor:pointer;font-family:var(--font-display);font-weight:600;color:var(--navy);}
.faq-item[open] summary{color:var(--teal-dark);}
.faq-item p{margin-top:10px;color:var(--ink-soft);}

.related{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px;}
.related a{
  font-family:var(--font-mono);font-size:.78rem;padding:8px 14px;border:1px solid var(--line);
  border-radius:999px;color:var(--navy);
}
.related a:hover{background:var(--bg-alt);text-decoration:none;}

/* -------------------- Disclaimer callout -------------------- */
.callout{
  background:#FFF4F1;border:1px solid #FFD9D1;border-radius:var(--radius-sm);
  padding:16px 18px;font-size:.92rem;color:#7A2E22;margin:20px 0;
}

/* -------------------- Footer -------------------- */
footer.site{background:var(--navy);color:#B9CCC7;padding:40px 0 30px;margin-top:40px;}
.footer-grid{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px;}
footer.site a{color:#D9E8E4;font-size:.88rem;}
footer.site .legal{margin-top:26px;font-size:.78rem;color:#7E9C95;font-family:var(--font-mono);}
footer.site nav ul{list-style:none;display:flex;gap:16px;flex-wrap:wrap;padding:0;margin:0;}

/* Ad slot placeholders — style only, empty until AdSense is approved */
.ad-slot{
  border:1px dashed var(--line);border-radius:var(--radius-sm);
  padding:10px;text-align:center;font-family:var(--font-mono);
  font-size:.7rem;color:var(--ink-soft);letter-spacing:.05em;
  margin:28px 0;background:var(--bg-alt);
}