/* Reset & base */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family-base);
  background: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Header / Nav */
header {
  padding: 1.25rem 5%;
  border-bottom: 1px solid var(--color-border-primary);
  background-color: var(--color-bg);
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  z-index: 100;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.site-title a {
  transition: opacity 0.3s;
}

.site-title a:hover {
  opacity: 0.6;
}

nav {
  display: flex;
  gap: 1.8rem;
  justify-content: flex-end;
}

nav a {
  transition: opacity 0.3s;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
}

nav a:hover {
  opacity: 0.6;
}

nav a.active {
  border-bottom: 1.5px solid var(--color-text-primary);
  padding-bottom: 2px;
}

/* Main content */
main {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 4rem 5%;
}

main h1,
main h2 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 300;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

main p {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
  max-width: 700px;
}

/* Home hero */
.hero-page {
  display: flex;
  align-items: center;
}

.hero {
  padding: 0;
}

.hero-label {
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: 1.25rem;
}

.hero h1,
.hero h2 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 300;
  line-height: 1.25;
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
  max-width: 800px;
}

.hero-subtitle {
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  margin-bottom: 1.5rem;
}

.hero-description {
  max-width: 612px;
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.contact-links {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.contact-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  color: var(--color-text-secondary);
  transition: color 0.3s;
}

.contact-links a span {
  padding-bottom: 3px;
  border-bottom: 1px solid var(--color-border-primary);
  transition: border-color 0.3s;
}

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

.contact-links a:hover span {
  border-color: var(--color-text-primary);
}

/* Fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.8s forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Footer */
footer {
  text-align: center;
  padding: 1.5rem 5%;
  border-top: 1px solid var(--color-border-primary);
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* Mobile */
@media (max-width: 768px) {
  header {
    padding: 1rem 5%;
  }

  .header-content {
    flex-direction: column;
    gap: 0.6rem;
  }

  nav {
    gap: 1.25rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  main {
    padding: 1.5rem 5%;
  }

  .hero h1,
  .hero h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
  }

  .hero-description {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.25rem;
  }

  .contact-links {
    flex-direction: column;
    gap: 1rem;
  }
}

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