:root {
  --bg: #ffffff;
  --ink: #0f172a;
  --muted: #475569;
  --accent: #2563eb;
  --card: #f8fafc;
  --border: #e2e8f0;
}

* { box-sizing: border-box; }
html { font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; }
body { margin: 0; color: var(--ink); background: var(--bg); line-height: 1.6; font-size: 16px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1000px; margin: 0 auto; padding: 1rem; }

/* Header */
.site-header { position: sticky; top: 0; background: rgba(255,255,255,.9); backdrop-filter: blur(6px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; position: relative; }
.brand img {
  display: block;
  height: 70px;
}
.nav a { margin-left: .75rem; font-weight: 500; }

/* Main */
.hero { padding: 3rem 0 2rem; }
.hero h1 { font-size: clamp(28px, 4vw, 44px); line-height: 1.1; margin: 0 0 .5rem; }
.lead { color: var(--muted); font-size: 1.125rem; max-width: 65ch; }

.button {
  display: inline-block; padding: .7rem 1rem; border-radius: .75rem;
  background: var(--accent); color: white; font-weight: 600; border: 1px solid transparent;
}
.button:hover { filter: brightness(0.95); text-decoration: none; }

.highlights { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; margin: 2rem 0; }
.card { background: var(--card); padding: 1rem; border: 1px solid var(--border); border-radius: .75rem; }
.card h3 { margin-top: .25rem; margin-bottom: .25rem; }

@media (max-width: 900px) {
  .highlights { grid-template-columns: 1fr; }
}

blockquote { border-left: 4px solid var(--accent); padding: .5rem 1rem; background: #f1f5f9; border-radius: .25rem; }
blockquote cite { display: block; color: var(--muted); margin-top: .25rem; font-style: normal; }


/* Footer */
.site-footer { margin-top: 3rem; border-top: 1px solid var(--border); background: #f9fafb; }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; padding: 1.25rem 0; }
.socials a { display: inline-block; margin-right: .75rem; }
.credit { color: var(--muted); }
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr; }
}
/* --- Mobile Hamburger Navigation --- */
.site-header { z-index: 1000; }

/* Desktop */
@media (min-width: 769px) {
  .nav-toggle { display: none; }
  .nav { display: flex; float: right; gap: 1rem; }
}

/* Button */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: .5rem;
  font-size: 1.6rem;
  line-height: 1;
  padding: .35rem .6rem;
  cursor: pointer;
}

/* Mobile */
@media (max-width: 768px) {
  .nav-toggle { display: inline-block; }

  .nav {
    display: none !important;
    position: absolute;
    right: 1rem;
    top: calc(100% + .5rem);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: .75rem;
    box-shadow: 0 8px 24px rgba(15,23,42,.08);
    padding: .75rem;
    width: min(260px, 90vw);
    float: none;
    z-index: 1001;
  }

  .nav.open { display: block !important; }

  .nav a {
    display: block;
    padding: .5rem .25rem;
    margin: 0;
  }
}

/* --- Footer (mobile) --- */
@media (max-width: 768px) {
  .site-footer {
    padding-left: 1rem;
    padding-right: 1rem;
    text-align: center;
    font-size: 1rem;
  }
  .site-footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .5rem;
  }
}