/* ── Navbar ─────────────────────────────────────────────────────── */

#main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: 68px;
  display: flex;
  align-items: center;
  transition: background 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease;
}

#main-nav.nav-scrolled {
  background: var(--bg-dark-transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border-subtle);
}

:root.light #main-nav.nav-scrolled {
  background: rgba(255,255,255,0.85);
  box-shadow: 0 1px 0 var(--border-light-subtle);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  height: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'Raleway', sans-serif;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
  flex-shrink: 0;
}
.nav-brand:hover { color: var(--color-primary); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.5rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-sec);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-link:hover { color: var(--text); background: var(--bg3); }
.nav-link.active { color: var(--text); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* Theme toggle button */
.theme-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-sec);
  transition: var(--transition);
  background: transparent;
  border: 1.5px solid var(--border);
}
.theme-btn:hover { color: var(--text); background: var(--bg3); }

/* Show sun in dark mode, moon in light mode */
:root .icon-sun { display: none; }
:root .icon-moon { display: block; }
:root.light .icon-sun { display: block; }
:root.light .icon-moon { display: none; }

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: transparent;
  transition: var(--transition);
}
.nav-hamburger:hover { background: var(--bg3); }

.nav-hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-sec);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-hamburger.open #line1 { transform: translateY(7px) rotate(40deg); }
.nav-hamburger.open #line2 { transform: scaleX(0); opacity: 0; }
.nav-hamburger.open #line3 { transform: translateY(-7px) rotate(-40deg); }

/* Nav overlay */
.nav-overlay {
  position: fixed;
  inset: 68px 0 0 0;
  background: rgba(0,0,0,0.5);
  z-index: 40;
  backdrop-filter: blur(2px);
}

/* Mobile menu */
@media (max-width: 767px) {
  .nav-hamburger { display: flex; }
  .nav-actions .btn { display: none; }
  .theme-btn { display: flex; }

  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-dark1);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.25rem 1.5rem;
    z-index: 45;
    transform: translateY(-110%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  }
  :root.light .nav-links { background: var(--bg-light1); }

  .nav-links.open { transform: translateY(0); }

  .nav-link {
    padding: 0.9rem 0.75rem;
    font-size: 1rem;
    border-bottom: 1px solid var(--border-subtle);
  }
  .nav-link:last-child { border-bottom: none; }

  .nav-links::after {
    content: '';
    display: block;
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }
}

@media (max-width: 767px) {
  .nav-links .mobile-auth {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
  }
}

/* ── Footer ─────────────────────────────────────────────────────── */

#main-footer {
  background: var(--bg-dark1);
  border-top: 1px solid var(--border-subtle);
  margin-top: auto;
}
:root.light #main-footer { background: var(--bg-light2); }

.footer-inner { padding: 4rem 0 2rem; }

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

@media (max-width: 767px) {
  .footer-top { grid-template-columns: 1fr; gap: 2rem; }
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'Raleway', sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--text);
  margin-bottom: 1rem;
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--text-sec);
  line-height: 1.7;
  max-width: 280px;
  margin-bottom: 1.5rem;
}

.footer-social {
  display: flex;
  gap: 0.75rem;
}

.social-link {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-sec);
  transition: var(--transition);
}
.social-link:hover { color: var(--text); background: var(--bg3); border-color: var(--border-strong); }

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

@media (max-width: 480px) {
  .footer-links-grid { grid-template-columns: repeat(2, 1fr); }
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: var(--text-sec);
  margin-bottom: 0.6rem;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--text); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 0.5rem;
}