/* ---- Sections ---- */
.section { position: relative; padding: var(--space-3xl) var(--space-md); }
.section__inner { max-width: var(--max-width); margin: 0 auto; }

/* ---- Hero ---- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: var(--nav-height);
}
.hero__content { position: relative; z-index: 2; display: flex; flex-direction: column; align-items: center; }
.hero__buttons {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  margin-top: var(--space-lg);
  flex-wrap: wrap;
}

/* ---- About ---- */
.about__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}
.about__stats { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-sm); }

/* ---- Roles ---- */
.roles__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }

/* ---- Certifications ---- */
.cert-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); }

/* ---- Interests ---- */
.interests__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }

/* ---- Footer ---- */
.footer {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

/* ---- Nav ---- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background var(--duration-normal) var(--ease-out-expo),
    border-color var(--duration-normal) var(--ease-out-expo),
    box-shadow var(--duration-normal) var(--ease-out-expo);
}
.nav--scrolled {
  background: rgba(253, 248, 245, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.nav__inner {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__logo { font-weight: 700; font-size: var(--fs-md); color: var(--text-primary); white-space: nowrap; }
.nav__logo span { color: var(--accent); }
.nav__links { display: flex; gap: var(--space-md); }
.nav__link { font-size: var(--fs-sm); color: var(--text-muted); transition: color var(--duration-fast); position: relative; font-weight: 500; }
.nav__link:hover, .nav__link--active { color: var(--text-primary); }
.nav__link--active::after {
  content: "";
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

/* ---- Hamburger (CSS-only) ---- */
.nav__toggle { display: none; }
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px; height: 28px;
  cursor: pointer;
}
.nav__hamburger span {
  display: block; width: 100%; height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: transform var(--duration-fast) var(--ease-out-expo), opacity var(--duration-fast);
}
.nav__toggle:checked ~ .nav__hamburger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle:checked ~ .nav__hamburger span:nth-child(2) { opacity: 0; }
.nav__toggle:checked ~ .nav__hamburger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }