/* ============================================================
   NAVBAR
   ============================================================ */

#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-h);
  z-index: var(--z-sticky);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-base), background var(--t-base), backdrop-filter var(--t-base);
}

#navbar.scrolled {
  background: var(--color-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-8);
  height: 100%;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--t-base);
}

.nav__theme-toggle:hover {
  background: var(--color-surface-2);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.nav__theme-toggle svg {
  width: 18px;
  height: 18px;
  position: absolute;
  transition: var(--t-base);
}

.nav__theme-toggle .sun { opacity: 0; transform: rotate(90deg) scale(0); }
.nav__theme-toggle .moon { opacity: 1; transform: rotate(0) scale(1); }

[data-theme="light"] .nav__theme-toggle .sun { opacity: 1; transform: rotate(0) scale(1); }
[data-theme="light"] .nav__theme-toggle .moon { opacity: 0; transform: rotate(-90deg) scale(0); }

/* ── Logo ── */
.nav__logo {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  text-decoration: none;
  margin-right: auto;
}

.nav__logo-mark {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  color: var(--color-accent);
  line-height: 1;
}

.nav__logo-name {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-weight: 400;
  letter-spacing: 0.02em;
  display: none;
}

@media (min-width: 640px) { .nav__logo-name { display: block; } }

/* ── Nav links ── */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  transition: color var(--t-fast), background var(--t-fast);
}

.nav__link:hover, .nav__link.active {
  color: var(--color-text-primary);
  background: var(--color-surface-2);
}

/* ── Resume button ── */
.nav__resume-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  border: 1px solid var(--color-border-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.02em;
  transition: all var(--t-fast);
}

.nav__resume-btn:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-dim);
}

.nav__resume-btn svg { width: 14px; height: 14px; }

/* ── Hamburger (mobile) ── */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: var(--space-1);
}

.nav__hamburger span {
  display: block;
  height: 1px;
  background: var(--color-text-secondary);
  transition: all var(--t-base);
  transform-origin: center;
}

.nav__hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); }

/* ── Mobile menu ── */
.nav__mobile-menu {
  position: fixed;
  top: var(--navbar-h);
  left: 0;
  right: 0;
  background: var(--color-bg);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-8) var(--container-padding);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: all var(--t-base);
}

.nav__mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

.nav__mobile-link {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  color: var(--color-text-secondary);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--t-fast);
}

.nav__mobile-link:hover { color: var(--color-accent); }

.nav__mobile-resume {
  margin-top: var(--space-4);
  align-self: flex-start;
}

@media (max-width: 768px) {
  .nav__inner { gap: var(--space-4); }
  .nav__links { display: none; }
  .nav__resume-btn { display: none; }
  .nav__hamburger { display: flex; }
}