@import url('variables.css');

/* Typography Scales */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  margin-bottom: 1.5rem;
}

h2 {
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  margin-bottom: 1.25rem;
}

h3 {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  margin-bottom: 1rem;
}

p {
  font-size: clamp(1rem, 1.1vw, 1.2rem);
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 8rem 0;
  position: relative;
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  max-width: 700px;
  margin-bottom: 4rem;
}

.section-tag {
  font-family: var(--font-heading);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: 1rem;
  display: inline-block;
  font-weight: 500;
}

/* Floating Navigation Bar */
.navbar {
  position: fixed;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 3rem);
  max-width: var(--container-max-width);
  height: 64px;
  background: linear-gradient(135deg, rgba(235, 235, 240, 0.85) 0%, rgba(243, 243, 248, 0.7) 100%);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(215, 215, 225, 0.6);
  border-radius: var(--border-radius-md);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  transition: var(--transition-smooth);
}

.navbar.scrolled {
  top: 0;
  width: 100%;
  max-width: 100%;
  border-radius: 0;
  border-left: none;
  border-right: none;
  border-top: none;
  background-color: var(--bg-primary);
}

/* Local CSS Variable mapping for backdrop fallback */
:root {
  --bg-primary-rgb: 249, 247, 242;
}

.nav-brand {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand span {
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
}

/* Footer Styles */
.footer {
  background-color: var(--bg-secondary);
  padding: 6rem 0 3rem;
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-brand-column p {
  margin-top: 1rem;
  max-width: 300px;
  font-size: 0.95rem;
}

.footer-column h4 {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.footer-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-meta {
  display: flex;
  gap: 2rem;
}

.footer-meta a:hover {
  color: var(--text-secondary);
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4rem;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  section {
    padding: 6rem 0;
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .navbar {
    top: 1rem;
    width: calc(100% - 2rem);
  }
  .nav-links {
    display: none; /* Controlled by JS class */
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    align-items: flex-start;
  }
  .nav-links.open {
    display: flex;
  }
  .menu-toggle {
    display: block;
  }
  .grid-2 {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
  .footer-meta {
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  section {
    padding: 4rem 0;
  }
}