/* styles.css - Minimum Viable Retirement
   Save alongside index.html
*/

:root{
  --bg: #0b1221;
  --card: #0f1724;
  --muted: #98a0b3;
  --accent: linear-gradient(135deg,#6dd3b0 0%,#4fa3ff 100%);
  --glass: rgba(255,255,255,0.03);
  --radius: 14px;
  --max-width: 1100px;
  --gap: 1.25rem;
  --accent-color: #5eead4;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  color-scheme: dark;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background: linear-gradient(180deg,#02040a 0%, #071129 60%);
  color: #e6eef8;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.5;
  font-size:16px;
}

/* container */
.container{
  width: min(92%, var(--max-width));
  margin: 0 auto;
}

/* Header */
.site-header{
  position:sticky;
  top:0;
  z-index:40;
  backdrop-filter: blur(6px);
  background: linear-gradient(180deg, rgba(11,18,33,0.65), rgba(11,18,33,0.25));
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.header-inner{
  display:flex;
  align-items:center;
  gap: var(--gap);
  padding:0.8rem 0;
}
.brand{
  display:flex;
  gap:0.75rem;
  align-items:center;
  color: #fff;
  text-decoration:none;
}
.brand .logo{width:42px;height:42px;color: #6dd3b0}
.brand-title{font-weight:700;font-size:1rem;letter-spacing:0.2px}

/* nav */
.nav{
  margin-left:auto;
  display:flex;
  gap:1rem;
  align-items:center;
}
.nav a{
  color:var(--muted);
  text-decoration:none;
  font-weight:600;
  padding:0.4rem 0.6rem;
  border-radius:8px;
}
.nav a:hover{color:#fff;background:rgba(255,255,255,0.02)}

/* mobile nav toggle */
.nav-toggle{
  display:none;
  margin-left:0.5rem;
  background:none;
  border:0;
  cursor:pointer;
}
.nav-toggle span{
  display:block;
  width:22px;height:2px;background:#c9d7ea;margin:4px 0;border-radius:2px;
}
@media(max-width:820px){
  .nav{position:absolute;right:1rem;top:68px;background:var(--card);padding:0.75rem;border-radius:10px;flex-direction:column;display:none;min-width:180px}
  .nav.open{display:flex}
  .nav-toggle{display:block}
}

/* Hero */
.hero{
  padding:3.5rem 0 2rem 0;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1fr 320px;
  gap:1.5rem;
  align-items:start;
}
.hero-copy h1{
  margin:0 0 0.6rem 0;
  font-size:clamp(1.4rem, 3.6vw, 2rem);
  line-height:1.05;
  font-weight:700;
  color: #fff;
}
.lead{color:var(--muted);margin:0 0 1rem 0}
.hero-ctas{display:flex;gap:0.75rem;flex-wrap:wrap}
.btn{
  display:inline-flex;
  align-items:center;
  gap:0.6rem;
  padding:0.6rem 0.9rem;
  border-radius:10px;
  text-decoration:none;
  font-weight:700;
  font-size:0.95rem;
  border:1px solid transparent;
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover{transform:translateY(-3px)}
.btn.primary{
  background:var(--accent);
  color:#07203b;
  box-shadow: 0 6px 20px rgba(79,163,255,0.12);
}
.btn.ghost{
  background:transparent;
  border:1px solid rgba(255,255,255,0.06);
  color:var(--muted);
}

/* hero-card */
.hero-card{
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius:var(--radius);
  padding:1.2rem;
  box-shadow: 0 8px 30px rgba(2,6,23,0.6);
  border: 1px solid rgba(255,255,255,0.03);
}
.hero-card h2{margin:0 0 0.25rem 0}
.muted{color:var(--muted)}
.snapshot{display:grid;grid-template-columns:1fr 1fr;gap:0.6rem;margin:0.6rem 0 0}
.snapshot dt{font-size:0.85rem;color:var(--muted)}
.snapshot dd{margin:0;font-weight:700;text-align:right}

/* sections */
.section{padding:2.4rem 0}
.section.alt{background: linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0.00));}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin-top:1rem}
.feature{background:var(--glass);padding:1rem;border-radius:12px;border:1px solid rgba(255,255,255,0.02)}

/* principles */
.principles{margin:0;padding-left:1.1rem;color:var(--muted)}
.principles li{margin:0.6rem 0}

/* tools */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}
.tool-card{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));padding:1rem;border-radius:12px;border:1px solid rgba(255,255,255,0.03)}

/* about & signup */
.about-grid{display:grid;grid-template-columns:1fr 320px;gap:1rem;align-items:start}
.signup-card{background:var(--glass);padding:1rem;border-radius:12px;border:1px solid rgba(255,255,255,0.03)}
.signup{display:flex;gap:0.5rem;margin-top:0.6rem}
.signup input[type="email"]{flex:1;padding:0.6rem;border-radius:8px;border:1px solid rgba(255,255,255,0.06);background:transparent;color:inherit}
.btn.small{padding:0.5rem 0.7rem;font-size:0.9rem;border-radius:8px}

/* footer */
.site-footer{border-top:1px solid rgba(255,255,255,0.03);padding:1rem 0;margin-top:2rem;background:transparent}
.footer-inner{display:flex;align-items:center;gap:1rem;justify-content:space-between}
.footer-nav a{color:var(--muted);text-decoration:none;margin-left:0.6rem}

/* responsive */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr}
  .hero-card{order:2}
  .hero-copy{order:1}
  .footer-inner{flex-direction:column;align-items:flex-start;gap:0.5rem}
}

/* accessibility */
.sr-only{
  position:absolute!important;
  width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;
}

/* reduce motion */
@media (prefers-reduced-motion: reduce){
  .btn{transition:none}
}