/* Responsive Utilities - Complete Mobile-First System */

/* Container Queries Support */
@container (min-width: 320px) {
  .container-query-sm {
    padding: var(--space-4);
  }
}

@container (min-width: 768px) {
  .container-query-md {
    padding: var(--space-8);
  }
}

/* Advanced Responsive Grid System */
.responsive-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.responsive-grid-sm {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.responsive-grid-lg {
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

/* Responsive Typography */
.responsive-text {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  line-height: 1.6;
}

.responsive-heading {
  font-size: clamp(1.5rem, 5vw, 3rem);
  line-height: 1.2;
}

.responsive-subheading {
  font-size: clamp(1.25rem, 3vw, 2rem);
  line-height: 1.3;
}

/* Mobile Navigation */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--space-2);
}

@media (max-width: 768px) {
  .mobile-nav-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-top: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }

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

  .main-nav ul {
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-3);
  }

  .main-nav a {
    display: block;
    padding: var(--space-3);
    border-radius: var(--radius-lg);
    transition: background-color var(--transition-base);
  }

  .main-nav a:hover {
    background-color: var(--color-muted);
  }
}

/* Responsive Images */
.responsive-image {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.responsive-image-contain {
  object-fit: contain;
}

.responsive-image-cover {
  object-fit: cover;
}

/* Aspect Ratio Utilities */
.aspect-square {
  aspect-ratio: 1 / 1;
}

.aspect-video {
  aspect-ratio: 16 / 9;
}

.aspect-photo {
  aspect-ratio: 4 / 3;
}

/* Responsive Spacing */
.responsive-padding {
  padding: clamp(1rem, 5vw, 3rem);
}

.responsive-margin {
  margin: clamp(1rem, 5vw, 3rem);
}

.responsive-gap {
  gap: clamp(1rem, 3vw, 2rem);
}

/* Touch-Friendly Interactions */
@media (hover: none) and (pointer: coarse) {
  .apple-button {
    min-height: 44px;
    min-width: 44px;
  }

  .main-nav a {
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .form-input,
  .form-select,
  .form-textarea {
    min-height: 44px;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  .apple-button {
    border: 2px solid currentColor;
  }

  .apple-card {
    border: 2px solid var(--color-border);
  }

  .form-input,
  .form-select,
  .form-textarea {
    border: 2px solid var(--color-border);
  }
}

/* Focus Visible Support */
.apple-button:focus-visible,
.form-input:focus-visible,
.form-select:focus-visible,
.form-textarea:focus-visible {
  outline: 2px solid var(--color-accent-500);
  outline-offset: 2px;
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip Links */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-accent-700);
  color: var(--color-white);
  padding: 8px;
  text-decoration: none;
  border-radius: var(--radius-base);
  z-index: 1000;
}

.skip-link:focus {
  top: 6px;
}