/* Navigation & Header */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  background: var(--bg-white);
  box-shadow: var(--shadow);
  border-radius: var(--border-radius);
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 80px;
  height: auto;
  padding-top: 10px;
  padding-bottom: 10px;
}
.nav-actions { display: flex; align-items: center; gap: 10px; }
.theme-toggle {
  background: var(--bg-white);
  border: 1px solid rgba(0,0,0,0.08);
  color: var(--text-dark);
  padding: 6px 10px;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 1px 6px rgba(0,0,0,0.06);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.theme-toggle:hover { border-color: var(--accent-color); }
.nav-brand {
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--main-color);
  letter-spacing: 1px;
  line-height: 1.2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  white-space: normal;
}
.nav-tagline {
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-top: 2px;
  line-height: 1.2;
  letter-spacing: 0.2px;
  white-space: normal;
}
[data-theme="dark"] .nav-tagline {
  color: #fff;
}
.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}
@media (max-width: 800px) {
  .nav-links {
    position: absolute;
    right: 16px;
    top: var(--nav-height);
    flex-direction: column;
    gap: 12px;
    background: var(--bg-white);
    padding: 12px 16px;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(75,0,110,0.12);
    display: none;
  }
  .nav-links.nav-open { display: flex; }
  .nav-toggle { display: flex; }
}
.nav-links li a {
  font-weight: 500;
  font-size: 1rem;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition);
}
.nav-links li a:hover,
.nav-links li a.active {
  border-color: var(--accent-color);
}
[data-theme="dark"] .nav-links li a:hover,
[data-theme="dark"] .nav-links li a.active {
  border-color: #fff;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  width: 28px;
  height: 3px;
  background: var(--main-color);
  border-radius: 2px;
  transition: all var(--transition);
}
.hero {
  max-width: var(--max-width);
  margin: 48px auto 32px auto;
  text-align: center;
  padding: 32px 16px;
  background: linear-gradient(120deg, var(--main-color), var(--accent-color));
  color: #fff;
  border-radius: var(--border-radius);
  box-shadow: 0 8px 28px rgba(0,0,0,0.12);
}
.hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.hero p {
  font-size: 1.15rem;
  font-weight: 500;
  max-width: 600px;
  margin: 0 auto;
}