/* ==========================================================================
   Responsive — Mobile (≤ 768px)
   ========================================================================== */
@media (max-width: 768px) {
  .hamburger-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--nav-height));
    height: calc(100dvh - var(--nav-height));
    background-color: var(--color-nav-solid);
    padding: var(--space-lg) var(--space-md);
    overflow-y: auto;
  }

  #main-nav.menu-open .nav-links {
    display: flex;
  }

  .nav-links a {
    font-size: 1.25rem;
    padding: var(--space-sm) 0;
  }

  section {
    padding: var(--space-lg) var(--space-sm);
  }

  .section-title {
    font-size: 1.75rem;
    margin-bottom: var(--space-sm);
  }

  .hero-names {
    font-size: 3.5rem;
  }

  .hero-date {
    font-size: 1.1rem;
    letter-spacing: 0.1em;
  }


  .hero-content {
    padding: var(--space-sm);
  }

  .timeline {
    padding-left: 0;
  }

  .timeline {
    gap: 0;
  }

  .timeline-entry {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
    padding: var(--space-sm);
    justify-items: center;
    text-align: center;
  }

  .dresscode-panel {
    opacity: 1;
    transform: none;
    pointer-events: auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .dresscode-trigger {
    display: none;
  }


  .timeline-entry img {
    max-width: 60%;
  }

  .timeline-content h3 {
    font-size: 1.1rem;
  }

  .details-grid {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .countdown-display {
    gap: var(--space-sm);
  }

  .countdown-digit {
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }

  .countdown-label {
    font-size: 0.5rem;
  }

  .celebratory-message {
    font-size: 1rem;
  }

  .rsvp-content {
    padding: var(--space-md) var(--space-sm);
  }

  .rsvp-content p {
    font-size: 1.3rem;
  }

  .rsvp-link {
    padding: 0.75rem 2rem;
    font-size: 0.95rem;
  }

  /* Gate — mobile */
  .envelope-scene {
    width: min(340px, 92vw);
  }

  .envelope-card {
    left: 20%;
    right: 20%;
    top: 3%;
    bottom: 3%;
  }

  .gate-icon {
    width: 64px;
    height: 64px;
  }

  .gate-title {
    font-size: 2rem;
  }

  .gate-subtitle {
    font-size: 0.8rem;
  }

  .gate-input-group {
    max-width: 260px;
  }

  #gate-password {
    width: 160px;
    padding: 0.6rem 0.8rem;
    font-size: 0.9rem;
  }

  #gate-submit {
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
  }

  .envelope-front-inner {
    padding: var(--space-xs) var(--space-sm);
  }

  .music-toggle {
    bottom: 16px;
    right: 16px;
  }

  .mobile-break {
    display: block;
  }
}

/* ==========================================================================
   Responsive — Tablet (769px – 1024px)
   ========================================================================== */
@media (min-width: 769px) and (max-width: 1024px) {
  .timeline-entry {
    grid-template-columns: 200px 1fr;
    gap: var(--space-sm);
  }

  .dresscode-panel {
    grid-column: 1 / -1;
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }
}

/* ==========================================================================
   Responsive — Large screens (≥ 1200px)
   ========================================================================== */
@media (min-width: 1200px) {
  :root {
    --max-width: 1300px;
  }

  section {
    padding: var(--space-lg) var(--space-lg);
  }

  .section-title {
    font-size: 3rem;
    margin-bottom: var(--space-sm);
  }

  .hero-names {
    font-size: 9rem;
  }

  .hero-date {
    font-size: 1.75rem;
  }


  .hero-content {
    max-width: 100%;
  }

  .timeline {
    gap: var(--space-md);
  }

  .timeline-entry {
    grid-template-columns: 220px 1fr 300px;
    gap: var(--space-sm);
  }

  .timeline-content h3 {
    font-size: 1.4rem;
  }

  .timeline-content p {
    font-size: 1.05rem;
  }

  .details-grid {
    gap: var(--space-lg);
  }

  .detail-card {
    padding: var(--space-lg) var(--space-md);
  }

  .detail-card h3 {
    font-size: 1.2rem;
  }

  .detail-card p {
    font-size: 1.05rem;
  }

  .countdown-display {
    gap: var(--space-lg);
  }

  .countdown-digit {
    width: 72px;
    height: 72px;
    font-size: 2rem;
  }

  .countdown-label {
    font-size: 0.75rem;
  }

  .celebratory-message {
    font-size: 1.25rem;
  }

  .rsvp-content {
    max-width: 700px;
  }

  .rsvp-link {
    padding: 1rem 3rem;
    font-size: 1.1rem;
  }
}