/* Minimal, modern styling inspired by product sites. */
:root{
  --bg: #0b1115;
  --surface: #0f1720;
  --text: #e8f2ef;
  --muted: #9fb4ad;
  --brand: #14c5a1;
  --brand-2: #1ea1f2;
  --accent: #24e2b1;
  --ring: rgba(36,226,177,.35);
  --card: #0f1820;
  --shadow: 0 10px 30px rgba(0,0,0,.45);
  --radius: 16px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font:16px/1.5 ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
  color:var(--text);
  background: radial-gradient(1200px 600px at 80% -10%, rgba(20,197,161,.2), transparent), #071014;
}

.container{width:min(1120px, 92vw); margin-inline:auto}

.site-header{
  position: sticky; top:0; z-index: 20;
  backdrop-filter: blur(8px);
  background: linear-gradient(180deg, rgba(7,16,20,.85), rgba(7,16,20,.55));
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.header-inner{display:flex; align-items:center; justify-content:space-between; padding:14px 0}
.brand{display:flex; align-items:center; gap:.6rem; text-decoration:none; color:var(--text); font-weight:700}
.brand-logo{width:28px; height:28px}
.brand-text{letter-spacing:.2px}

.nav a{color:var(--text); text-decoration:none; margin-left:1rem; opacity:.9}
.nav a:hover{opacity:1}

.hero{padding:56px 0 24px; background:
  radial-gradient(700px 280px at 10% 0%, rgba(30,161,242,.12), transparent),
  radial-gradient(900px 320px at 90% 0%, rgba(20,197,161,.12), transparent);
}
.hero-inner{display:grid; grid-template-columns: 1.1fr .9fr; gap:42px; align-items:center}
.hero h1{font-size: clamp(28px, 5vw, 48px); line-height:1.1; margin:0 0 12px}
.lead{color:var(--muted); font-size: clamp(16px, 2.4vw, 18px)}
.cta-row{display:flex; gap:12px; margin-top:18px}
.footnote{color:var(--muted); font-size:12px; margin-top:10px}
.hero-art img{max-width:100%; filter: drop-shadow(var(--shadow)); opacity:.95}

.hero-belt{border-top:1px solid rgba(255,255,255,.06); margin-top:28px}
.belt-grid{display:grid; grid-template-columns: repeat(3, 1fr); gap:18px; padding:18px 0}
.belt-item{display:flex; align-items:center; gap:.6rem; color:var(--muted)}
.icon{width:18px; height:18px; fill:var(--accent); opacity:.9}

.section{padding:64px 0}
.subhead{color:var(--muted)}

.card{
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.01));
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding:18px;
}

.form-grid{display:grid; grid-template-columns: repeat(4, 1fr); gap:14px; align-items:end; margin-top:16px}
.form-row{display:flex; flex-direction:column; gap:8px}
.form-row label{font-weight:600}
input, select, button{
  font:inherit; color:var(--text);
}
input, select{
  background: var(--surface);
  border:1px solid rgba(255,255,255,.12);
  border-radius: 10px;
  padding:12px 12px;
  outline:none;
}
input:focus, select:focus{border-color: var(--accent); box-shadow: 0 0 0 6px var(--ring)}

.form-actions{display:flex; gap:10px; align-items:center}

.results-grid{display:grid; grid-template-columns: repeat(3, 1fr); gap:14px; margin-top:16px}
.big{font-size: clamp(18px, 4vw, 28px); font-weight:800}
.muted{color:var(--muted)}
.small{font-size:12px}

.grid-3{display:grid; grid-template-columns: repeat(3, 1fr); gap:16px; margin-top:16px}
.feature{display:flex; gap:12px; align-items:flex-start}
.feature-icon{width:38px; height:38px; display:grid; place-items:center; border-radius: 10px; background: linear-gradient(135deg, rgba(30,161,242,.22), rgba(20,197,161,.22)); border:1px solid rgba(255,255,255,.08)}
.feature-icon svg{width:22px; height:22px; fill:var(--accent)}

.don{background: radial-gradient(500px 240px at 10% 0%, rgba(30,161,242,.09), transparent)}
.don-inner{display:grid; grid-template-columns: 1.3fr .7fr; gap:22px; align-items:center}
blockquote{margin:0; padding-left:14px; border-left:3px solid var(--accent); color:#d8f6ee}

.btn{
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color:#001314;
  border:none; padding:12px 16px; border-radius: 12px; font-weight:800; text-decoration:none; display:inline-block;
  box-shadow: 0 14px 40px rgba(20,197,161,.25);
}
.btn:hover{filter: brightness(1.06)}
.btn-ghost{
  background: transparent;
  color:var(--text);
  border:1px solid rgba(255,255,255,.16);
}
.btn-ghost:hover{border-color: rgba(255,255,255,.28)}

.note summary{cursor:pointer; font-weight:700}
.note .note-body{margin-top:8px; color:var(--muted)}

.site-footer{border-top:1px solid rgba(255,255,255,.06); padding:28px 0 48px}
.footer-grid{display:grid; grid-template-columns: 1fr 1fr 1fr; gap:16px}
.footer-links{list-style:none; padding:0; margin:0}
.footer-links a{color:var(--text); text-decoration:none; opacity:.9}
.footer-links a:hover{opacity:1}

/* Responsive */
@media (max-width: 940px){
  .hero-inner{grid-template-columns: 1fr}
  .form-grid{grid-template-columns: 1fr 1fr}
  .results-grid, .grid-3{grid-template-columns: 1fr}
  .don-inner{grid-template-columns: 1fr}
  .footer-grid{grid-template-columns: 1fr; gap:8px}
}