/* ============================================
   Responsive Styles
   Breakpoints: 768px (tablet), 480px (mobile)
   ============================================ */

/* --- Tablet (≤768px) --- */
@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  /* Navigation */
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: rgba(13, 13, 16, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: var(--spacing-xl);
    gap: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base),
                opacity var(--transition-base),
                visibility var(--transition-base);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links a {
    font-size: var(--font-size-lg);
    width: 100%;
    padding: var(--spacing-sm) 0;
  }

  .nav-links a::after {
    display: none;
  }

  .nav-cta {
    width: 100%;
    text-align: center;
    margin-top: var(--spacing-md);
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height) + var(--spacing-3xl));
    padding-bottom: var(--spacing-3xl);
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
  }

  /* World Section */
  .world-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .world-image {
    order: -1;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }

  /* Section spacing */
  .section {
    padding: var(--spacing-3xl) 0;
  }

  /* Download buttons */
  .download-btn {
    min-width: 180px;
    padding: var(--spacing-sm) var(--spacing-lg);
  }
}

/* --- Mobile (≤480px) --- */
@media (max-width: 480px) {
  :root {
    --spacing-xl: 1.25rem;
    --spacing-2xl: 2rem;
    --spacing-3xl: 3rem;
  }

  .container {
    padding: 0 var(--spacing-lg);
  }

  /* Hero */
  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .hero-badge {
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-md);
  }

  /* Buttons */
  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
  }

  /* Section header */
  .section-header h2 {
    font-size: var(--font-size-2xl);
  }

  /* Features */
  .features-grid {
    grid-template-columns: 1fr;
  }

  /* Characters */
  .characters-grid {
    grid-template-columns: 1fr;
  }

  /* Gallery */
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  /* Platform buttons */
  .platform-btn-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
  }

  .platform-btn {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .platform-icon {
    width: 44px;
    height: 44px;
    font-size: 26px;
  }

  .platform-name {
    font-size: var(--font-size-base);
  }

  /* Requirements table */
  .req-table th,
  .req-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }

  .req-table td:first-child {
    width: 100px;
  }

  /* Download buttons */
  .download-platforms {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-md);
  }

  .download-btn {
    min-width: unset;
    justify-content: center;
  }
}

/* --- Small Mobile (≤360px) --- */
@media (max-width: 360px) {
  .platform-btn-grid {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: var(--font-size-2xl);
  }
}

/* --- Height-based adjustments --- */
@media (max-height: 600px) and (min-width: 769px) {
  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height) + var(--spacing-2xl));
    padding-bottom: var(--spacing-2xl);
  }
}

/* --- Features carousel responsive --- */
@media (max-width: 768px) {
  .features-carousel {
    gap: var(--spacing-sm);
  }

  .carousel-btn {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }

  .feature-card {
    flex-basis: 280px;
    padding: var(--spacing-lg) var(--spacing-xl);
  }
}

@media (max-width: 480px) {
  .carousel-btn {
    display: none;
  }

  .feature-card {
    flex-basis: 260px;
  }
}