@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap');

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Inter', sans-serif;
  color: #1a1a1a;
  background: #fff;
  font-size: 16px;
  line-height: 1.7;
}

/* ── HEADER ── */
header {
  border-bottom: 1px solid #eee;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  position: sticky;
  top: 0;
  background: #fff;
  z-index: 200;
}

.logo a {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #1a1a1a;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.03em;
}

.logo img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: contain;
  background: #fff;
  padding: 2px;
}

nav { display: flex; gap: 28px; align-items: center; }

nav a {
  text-decoration: none;
  color: #1a1a1a;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: opacity 0.2s;
}

nav a:hover { opacity: 0.4; }

/* ── HAMBURGER ── */
.hamburger {
  display: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.hamburger span { display: block; width: 22px; height: 2px; background: #1a1a1a; transition: 0.2s; }

.mobile-nav {
  display: none;
  position: fixed;
  top: 68px;
  left: 0; right: 0;
  background: #fff;
  border-bottom: 1px solid #eee;
  z-index: 199;
  padding: 24px 24px 28px;
  flex-direction: column;
  gap: 22px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a { font-size: 16px; text-decoration: none; color: #1a1a1a; font-weight: 500; }

/* ── MAIN ── */
main { max-width: 860px; margin: 0 auto; padding: 60px 24px 100px; }

h1 { font-size: 26px; font-weight: 700; line-height: 1.3; margin-bottom: 24px; }
h2 { font-size: 20px; font-weight: 700; margin-bottom: 16px; }
h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
p  { margin-bottom: 16px; color: #333; }
a  { color: #1a1a1a; }

/* ── FOOTER ── */
footer {
  border-top: 1px solid #eee;
  text-align: center;
  padding: 28px 20px;
  font-size: 11px;
  color: #aaa;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ── RESPONSIVE ── */
@media (max-width: 680px) {
  header { padding: 0 20px; }
  nav { display: none; }
  .hamburger { display: flex; }
  main { padding: 40px 18px 80px; }
  h1 { font-size: 22px; }
}