@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root{
  --bg:#07090d;
  --bg-2:#0b0f16;
  --panel:#11161f;
  --panel-2:#161c27;
  --line:#232b38;
  --line-soft:#1a212c;
  --text:#eef2f6;
  --muted:#8d98a8;
  --muted-2:#657085;
  --accent:#c9ff4d;
  --accent-2:#8ee000;
  --blue:#5fb4ff;
  --blue-2:#3d8bff;
  --coral:#ff7a59;
  --coral-2:#ff5a7a;
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,Menlo,monospace;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --display:"Space Grotesk","Inter",sans-serif;
  --radius:16px;
  --shadow-glow: 0 0 0 1px rgba(255,255,255,0.04), 0 20px 60px -20px rgba(0,0,0,0.6);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
html,body{margin:0;padding:0;}
body{
  background:
    radial-gradient(900px 500px at 85% -10%, color-mix(in srgb, var(--accent) 14%, transparent), transparent),
    radial-gradient(700px 500px at -10% 20%, color-mix(in srgb, var(--accent) 6%, transparent), transparent),
    var(--bg);
  color:var(--text);
  font-family:var(--sans);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none;}
a:hover{text-decoration:underline;}
.grid-band{
  position:relative;
  background-image:
    repeating-linear-gradient(0deg, rgba(255,255,255,0.03) 0px, rgba(255,255,255,0.03) 1px, transparent 1px, transparent 44px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.03) 0px, rgba(255,255,255,0.03) 1px, transparent 1px, transparent 44px);
  -webkit-mask-image:linear-gradient(to bottom, black, rgba(0,0,0,0.3));
  mask-image:linear-gradient(to bottom, black, rgba(0,0,0,0.3));
}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px;}

header.site-header{
  position:sticky;top:0;z-index:40;
  border-bottom:1px solid var(--line-soft);
  padding:16px 0;
  background:rgba(7,9,13,0.72);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;max-width:1120px;margin:0 auto;padding:0 24px;}
.logo{font-family:var(--display);font-size:1.2rem;font-weight:700;color:var(--text);letter-spacing:-0.02em;display:flex;align-items:center;gap:8px;}
.logo .logo-mark{width:22px;height:22px;flex-shrink:0;}
.logo span{background:linear-gradient(120deg, var(--accent), var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent;}
nav.main-nav{display:flex;gap:4px;flex-wrap:wrap;align-items:center;}
nav.main-nav a{color:var(--muted);font-size:0.86rem;font-family:var(--mono);padding:8px 12px;border-radius:8px;transition:color .15s, background .15s;}
nav.main-nav a:hover{color:var(--text);text-decoration:none;background:rgba(255,255,255,0.05);}

.breadcrumb{font-family:var(--mono);font-size:0.78rem;color:var(--muted-2);padding:18px 0 0;}
.breadcrumb a{color:var(--muted-2);}

section.hero{padding:72px 0 48px;position:relative;overflow:hidden;}
.hero-inner{display:grid;grid-template-columns:1.15fr 0.85fr;gap:48px;align-items:center;max-width:1120px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}
.hero-inner h1{font-family:var(--display);font-size:clamp(2rem, 1.5rem + 2vw, 2.9rem);line-height:1.08;margin:0 0 16px;letter-spacing:-0.02em;}
.hero-inner p.lede{color:var(--muted);font-size:1.08rem;max-width:50ch;}
.eyebrow{font-family:var(--mono);color:var(--accent);font-size:0.78rem;text-transform:uppercase;letter-spacing:0.1em;margin-bottom:14px;display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border:1px solid color-mix(in srgb, var(--accent) 35%, transparent);border-radius:99px;background:color-mix(in srgb, var(--accent) 8%, transparent);}

.car-illustration{width:100%;max-width:380px;justify-self:center;filter:drop-shadow(0 30px 40px rgba(0,0,0,0.55));}

.tool-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin:44px 0;}
.tool-card{
  position:relative;
  background:linear-gradient(160deg, var(--panel-2), var(--panel));
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:26px;
  transition:border-color .2s, transform .2s, box-shadow .2s;
  overflow:hidden;
  box-shadow:var(--shadow-glow);
}
.tool-card::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:linear-gradient(140deg, color-mix(in srgb, var(--accent) 50%, transparent), transparent 40%);
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor; mask-composite:exclude;
  opacity:0; transition:opacity .2s;
}
.tool-card:hover{border-color:color-mix(in srgb, var(--accent) 45%, var(--line));transform:translateY(-4px);text-decoration:none;box-shadow:0 24px 50px -20px rgba(0,0,0,0.7);}
.tool-card:hover::before{opacity:1;}
.tool-card h3{margin:0 0 8px;font-size:1.08rem;color:var(--text);font-family:var(--display);}
.tool-card p{margin:0;color:var(--muted);font-size:0.9rem;}
.tool-card .tag{font-family:var(--mono);font-size:0.68rem;color:var(--accent);display:inline-block;margin-bottom:12px;letter-spacing:0.06em;background:color-mix(in srgb, var(--accent) 12%, transparent);padding:3px 9px;border-radius:99px;}
.tool-card .tag.guide{color:var(--blue);background:color-mix(in srgb, var(--blue) 14%, transparent);}

main{padding:36px 0 72px;}
.content-block{max-width:740px;}
.content-block h2{font-family:var(--display);font-size:1.45rem;margin-top:48px;margin-bottom:14px;letter-spacing:-0.01em;}
.content-block h2:first-child{margin-top:0;}
.content-block p{color:#c3cdd9;}

.calc-panel{
  background:linear-gradient(165deg, var(--panel-2), var(--panel));
  border:1px solid var(--line);
  border-radius:20px;
  padding:32px;
  margin-top:8px;
  box-shadow:var(--shadow-glow);
  position:relative;
}
.calc-panel h2{margin-top:0;font-size:1.25rem;font-family:var(--display);}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px;}
.field{display:flex;flex-direction:column;gap:7px;}
.field label{font-size:0.8rem;color:var(--muted);font-family:var(--mono);}
.field input,.field select{
  background:var(--bg-2);
  border:1px solid var(--line);
  color:var(--text);
  border-radius:10px;
  padding:11px 13px;
  font-size:0.95rem;
  font-family:var(--sans);
  transition:border-color .15s, box-shadow .15s;
}
.field input:focus,.field select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);}
button.calc-btn{
  margin-top:10px;
  background:linear-gradient(120deg, var(--accent), var(--accent-2));
  color:#08110a;
  border:none;
  border-radius:10px;
  padding:13px 24px;
  font-weight:700;
  font-size:0.95rem;
  cursor:pointer;
  font-family:var(--sans);
  box-shadow:0 10px 30px -10px color-mix(in srgb, var(--accent) 60%, transparent);
  transition:transform .15s, box-shadow .15s;
}
button.calc-btn:hover{transform:translateY(-1px);box-shadow:0 14px 34px -10px color-mix(in srgb, var(--accent) 70%, transparent);}
button.calc-btn:active{transform:translateY(0);}

.result-box{
  margin-top:24px;
  border-top:1px dashed var(--line);
  padding-top:22px;
  display:none;
}
.result-box.visible{display:block;animation:fadeUp .35s ease;}
@keyframes fadeUp{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:translateY(0);}}
.result-box .headline{font-size:2rem;font-weight:700;background:linear-gradient(120deg, var(--accent), var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent;font-family:var(--display);}
.result-box .sub{color:var(--muted);font-size:0.9rem;margin-top:4px;}
.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-top:18px;}
.result-item{background:var(--bg-2);border:1px solid var(--line);border-radius:12px;padding:16px;}
.result-item .label{font-size:0.72rem;color:var(--muted-2);font-family:var(--mono);letter-spacing:0.04em;}
.result-item .value{font-size:1.2rem;font-weight:700;margin-top:5px;font-family:var(--display);}

table.data-table{width:100%;border-collapse:separate;border-spacing:0;margin:20px 0;border-radius:12px;overflow:hidden;border:1px solid var(--line);}
table.data-table th,table.data-table td{padding:12px 14px;text-align:left;font-size:0.9rem;border-bottom:1px solid var(--line-soft);}
table.data-table tr:last-child td{border-bottom:none;}
table.data-table th{background:var(--panel-2);font-family:var(--mono);font-weight:600;color:var(--muted);font-size:0.78rem;letter-spacing:0.04em;text-transform:uppercase;}
table.data-table td{background:var(--panel);}

.faq{margin-top:48px;}
.faq details{background:linear-gradient(160deg, var(--panel-2), var(--panel));border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:10px;}
.faq details[open]{border-color:color-mix(in srgb, var(--accent) 30%, var(--line));}
.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{content:"+";color:var(--accent);font-size:1.2rem;font-weight:400;margin-left:12px;}
.faq details[open] summary::after{content:"\2212";}
.faq p{margin:12px 0 0;color:var(--muted);}

footer.site-footer{border-top:1px solid var(--line-soft);padding:40px 0;margin-top:48px;}
.footer-inner{max-width:1120px;margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:18px;}
.footer-links{display:flex;gap:20px;flex-wrap:wrap;}
.footer-links a{color:var(--muted);font-size:0.85rem;}
.footer-note{color:var(--muted-2);font-size:0.8rem;font-family:var(--mono);}

@media (max-width:760px){
  .hero-inner{grid-template-columns:1fr;}
  .hero-inner > :nth-child(2){order:-1;}
  .car-illustration{max-width:240px;}
  .field-row{grid-template-columns:1fr;}
  nav.main-nav{gap:2px;}
  nav.main-nav a{padding:7px 9px;font-size:0.8rem;}
  section.hero{padding:40px 0 32px;}
}