/* 41 Labs styles */
/* ====== Tokens ====== */
:root {
  --color-bg: #111319;
  --color-surface: #1C212A;
  --color-text: #E9EDF1;
  --color-accent: #F4A300;
  --color-link: #6AA3FF;
  --spacing: 1rem;
  --radius: 6px;
  --transition: 0.3s ease;
 main
}

/* ====== Base ====== */
html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  width: min(90%, 70rem);
  margin-inline: auto;
  padding-block: var(--spacing);
}

h1, h2, h3 {
  font-family: 'Inter', system-ui, sans-serif;
  line-height: 1.2;
}

h1 {font-size: 2.5rem;}
h2 {font-size: 2rem; margin-top: 0;}
h3 {font-size: 1.25rem;}

p, li {font-size: 1rem;}

/* ====== Header & Nav ====== */
.site-header {
  position: sticky;
  top: var(--notice-height);
  background: var(--color-bg);
  z-index: 1000;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.nav {display: flex; align-items: center;}
.nav-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--spacing);
}
.nav-menu a {color: var(--color-text); text-decoration: none;}
.nav-menu a:hover, .nav-menu a:focus {color: var(--color-link);}

.nav-toggle {
  background: none;
  border: 1px solid var(--color-text);
  color: var(--color-text);
  padding: 0.25rem;
  border-radius: var(--radius);
  display: none;
}
.nav-toggle:focus {outline: 2px solid var(--color-link);}
.hamburger {width: 1.5rem; height: 0.15rem; background: var(--color-text); display: block; position: relative;}
.hamburger::before,.hamburger::after {content:""; position:absolute; width:100%; height:100%; background: var(--color-text); left:0; transition:var(--transition);} 
.hamburger::before {top:-0.4rem;} .hamburger::after {top:0.4rem;}

@media (max-width: 50rem) {
  .nav-toggle {display: block;}
  .nav-menu {position: absolute; top:100%; right:0; background: var(--color-bg); flex-direction: column; align-items: flex-start; padding:1rem; border:1px solid rgba(255,255,255,0.1); max-height:0; overflow:hidden; transition:max-height var(--transition);}
  .nav-menu.open {max-height:15rem;}
}


/* Site notice */
.site-notice {
  background: var(--color-accent);
  color: #111319;
  text-align: center;
  padding: 0.5rem;
  font-weight: 600;

  position: sticky;
  top: 0;
  z-index: 1100;
 main
}

/* ====== Hero ====== */
.hero {
  padding: 6rem 0;
  background: radial-gradient(circle at top left, #1C212A, #111319);
  text-align: center;
}
.hero .tagline {margin-bottom:2rem;}

.cta-group {display:flex; gap:1rem; justify-content:center; flex-wrap:wrap;}

/* ====== Buttons ====== */
.btn {
  display:inline-block;
  padding:0.75rem 1.25rem;
  border-radius:var(--radius);
  text-decoration:none;
  font-weight:600;
  transition:background var(--transition), color var(--transition);
}
.btn.primary {background:var(--color-accent); color:#111319;}
.btn.primary:hover,.btn.primary:focus {background:#ffb425;}
.btn.secondary {border:1px solid var(--color-link); color:var(--color-link);}
.btn.secondary:hover,.btn.secondary:focus {background:var(--color-link); color:#111319;}

/* ====== Sections ====== */
.section {padding:4rem 0;}
.card-grid {display:grid; gap:1.5rem; grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));}
.card {background:var(--color-surface); padding:1.5rem; border-radius:var(--radius); box-shadow:0 0 0 1px rgba(0,0,0,0.2); transition:transform var(--transition), box-shadow var(--transition);}
.card:hover, .card:focus-within {transform:translateY(-4px); box-shadow:0 4px 10px rgba(0,0,0,0.3);}
.card-icon {width:40px; height:40px;}

.pillars {display:grid; grid-template-columns:repeat(auto-fit,minmax(10rem,1fr)); gap:0.5rem; list-style:none; padding:0;}
.pillars li {background:var(--color-surface); padding:0.5rem 1rem; border-radius:var(--radius);}

/* ====== Investors ====== */
.investors ul {list-style:disc; padding-left:1.5rem;}

/* ====== Footer ====== */
.site-footer {background:var(--color-surface); text-align:center;}
.footer-links {list-style:none; padding:0; margin:1rem 0; display:flex; justify-content:center; gap:1rem; align-items:center;}
.footer-links a {color:var(--color-text); text-decoration:none;}
.footer-links a:hover, .footer-links a:focus {color:var(--color-link);} 
.footer-links img {width:24px; height:24px;}

/* ====== Utilities ====== */
.sr-only {position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); border:0;}

.fade {opacity:0; transform:translateY(20px); transition:opacity .6s ease, transform .6s ease;}
.fade.visible {opacity:1; transform:none;}

@media (prefers-reduced-motion: reduce) {
  html {scroll-behavior: auto;}
  .fade {transition:none;}
}