/* 
  Responsive Styles — Mobile-First Breakpoints
*/

/* ===== Tablet and below (max-width: 768px) ===== */
@media (max-width: 768px) {
  /* Header & Nav */
  .nav-container {
    padding: 0.75rem 1rem;
  }
  
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: rgba(250, 249, 246, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 1rem 2rem 1.5rem;
    gap: 0.5rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  }

  .nav-links.mobile-open {
    display: flex;
  }

  .nav-link {
    padding: 0.6rem 0;
    font-size: 1.05rem;
  }

  /* Hero Section */
  .hero-content {
    padding: 1.5rem;
  }

  .countdown-container {
    gap: 0.75rem;
  }

  .countdown-item {
    min-width: 70px;
    padding: 1rem 0.75rem;
  }

  .countdown-number {
    font-size: 2rem;
  }

  .info-bar {
    flex-direction: column;
    align-items: center;
  }

  /* Timeline / Tabs */
  .tab-switcher {
    flex-direction: column;
    padding: 0.35rem;
  }

  .tab-btn {
    width: 100%;
    text-align: center;
  }

  .timeline {
    padding-left: 30px;
  }

  .timeline::before {
    left: 10px;
  }

  .timeline-dot {
    left: -23px;
  }

  .timeline-card-image {
    height: 180px;
  }

  /* General Sections */
  .section-padding {
    padding: 3rem 1rem;
  }

  /* Voting Section */
  .voting-grid {
    grid-template-columns: 1fr;
  }

  .recommend-form {
    margin: 0 1rem 2rem 1rem;
  }
}

/* ===== Small Mobile (max-width: 480px) ===== */
@media (max-width: 480px) {
  /* Hero */
  .countdown-container {
    gap: 0.5rem;
  }

  .countdown-item {
    min-width: 60px;
    padding: 0.75rem 0.5rem;
  }

  .countdown-number {
    font-size: 1.8rem;
  }

  .hero-title {
    margin-bottom: 0.3rem;
  }

  .hero-subtitle {
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
  }

  .shinkansen-banner {
    font-size: 0.85rem;
    flex-direction: column;
    text-align: center;
    padding: 1rem;
  }

  .info-chip {
    font-size: 0.82rem;
    padding: 0.6rem 1rem;
  }

  /* Timeline */
  .timeline-card-body {
    padding: 1rem;
  }

  .timeline-card-title {
    font-size: 1.1rem;
  }

  .timeline-card-desc {
    font-size: 0.9rem;
  }

  /* Voting */
  .vote-card {
    padding: 1rem;
  }

  .recommend-form {
    padding: 1.25rem;
  }
}