/* Responsive Design Enhancements for Tutor One */

/* ===== MOBILE-FIRST RESPONSIVE DESIGN ===== */

/* Base Mobile Styles (320px+) */
@media (min-width: 320px) {
  .container-mobile {
    padding-left: var(--spacing-4);
    padding-right: var(--spacing-4);
  }
  
  .text-responsive {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
  }
  
  .btn-mobile {
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-sm);
    min-height: 44px; /* Touch-friendly minimum */
  }
  
  .card-mobile {
    margin: var(--spacing-2);
    border-radius: var(--radius-lg);
  }
}

/* Small Mobile (375px+) */
@media (min-width: 375px) {
  .text-responsive {
    font-size: var(--font-size-base);
  }
}

/* Large Mobile / Small Tablet (480px+) */
@media (min-width: 480px) {
  .container-mobile {
    padding-left: var(--spacing-6);
    padding-right: var(--spacing-6);
  }
  
  .card-mobile {
    margin: var(--spacing-4);
    border-radius: var(--radius-xl);
  }
}

/* Tablet Portrait (768px+) */
@media (min-width: 768px) {
  .container-tablet {
    max-width: 728px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-6);
    padding-right: var(--spacing-6);
  }
  
  .grid-tablet {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-6);
  }
  
  .text-tablet {
    font-size: var(--font-size-lg);
  }
}

/* Tablet Landscape / Small Desktop (1024px+) */
@media (min-width: 1024px) {
  .container-desktop {
    max-width: 984px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-8);
    padding-right: var(--spacing-8);
  }
  
  .grid-desktop {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
  }
  
  .sidebar-desktop {
    display: block;
  }
  
  .mobile-menu {
    display: none;
  }
}

/* Large Desktop (1280px+) */
@media (min-width: 1280px) {
  .container-large {
    max-width: 1240px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .grid-large {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ===== TOUCH-FRIENDLY INTERACTIONS ===== */
@media (hover: none) and (pointer: coarse) {
  /* Touch devices */
  .btn, .card, .form-input {
    min-height: 44px;
  }
  
  .btn:hover {
    transform: none; /* Disable hover effects on touch */
  }
  
  .touch-action-manipulation {
    touch-action: manipulation;
  }
}

/* ===== NAVIGATION RESPONSIVE PATTERNS ===== */
.nav-mobile {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background-color: white;
  border-bottom: 1px solid var(--color-neutral-200);
  padding: var(--spacing-4);
}

.nav-desktop {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-neutral-200);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: block;
  background: none;
  border: none;
  padding: var(--spacing-2);
  cursor: pointer;
}

@media (min-width: 1024px) {
  .mobile-menu-toggle {
    display: none;
  }
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 280px;
  background-color: white;
  z-index: var(--z-modal);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
}

.mobile-menu-panel.active {
  transform: translateX(0);
}

/* ===== FORM RESPONSIVE PATTERNS ===== */
.form-responsive {
  width: 100%;
}

@media (min-width: 768px) {
  .form-responsive {
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }
}

.form-group-responsive {
  margin-bottom: var(--spacing-4);
}

@media (min-width: 768px) {
  .form-group-responsive {
    margin-bottom: var(--spacing-6);
  }
  
  .form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
  }
}

/* ===== CARD RESPONSIVE PATTERNS ===== */
.card-responsive {
  margin-bottom: var(--spacing-4);
}

@media (min-width: 768px) {
  .card-responsive {
    margin-bottom: var(--spacing-6);
  }
}

.card-grid {
  display: grid;
  gap: var(--spacing-4);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-6);
  }
}

/* ===== TYPOGRAPHY RESPONSIVE PATTERNS ===== */
.heading-responsive {
  font-size: var(--font-size-2xl);
  line-height: var(--line-height-tight);
  font-weight: var(--font-weight-black);
}

@media (min-width: 640px) {
  .heading-responsive {
    font-size: var(--font-size-3xl);
  }
}

@media (min-width: 768px) {
  .heading-responsive {
    font-size: var(--font-size-4xl);
  }
}

@media (min-width: 1024px) {
  .heading-responsive {
    font-size: var(--font-size-5xl);
  }
}

.subheading-responsive {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-normal);
  font-weight: var(--font-weight-semibold);
}

@media (min-width: 768px) {
  .subheading-responsive {
    font-size: var(--font-size-xl);
  }
}

@media (min-width: 1024px) {
  .subheading-responsive {
    font-size: var(--font-size-2xl);
  }
}

/* ===== SPACING RESPONSIVE PATTERNS ===== */
.section-spacing {
  padding-top: var(--spacing-8);
  padding-bottom: var(--spacing-8);
}

@media (min-width: 768px) {
  .section-spacing {
    padding-top: var(--spacing-12);
    padding-bottom: var(--spacing-12);
  }
}

@media (min-width: 1024px) {
  .section-spacing {
    padding-top: var(--spacing-16);
    padding-bottom: var(--spacing-16);
  }
}

/* ===== ACCESSIBILITY RESPONSIVE PATTERNS ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-color-scheme: dark) {
  /* Dark mode support - can be expanded later */
  :root {
    --color-neutral-50: #1f2937;
    --color-neutral-900: #f9fafb;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .btn {
    border-width: 2px;
  }
  
  .form-input {
    border-width: 2px;
  }
  
  .card {
    border-width: 2px;
  }
}

/* ===== PRINT STYLES ===== */
@media print {
  .no-print {
    display: none !important;
  }
  
  .btn {
    border: 1px solid #000;
    background: transparent !important;
    color: #000 !important;
  }
  
  .card {
    border: 1px solid #000;
    box-shadow: none;
  }
  
  a[href]:after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
  }
}