/* Mobile-First Design Improvements
   Following Apple HIG and modern mobile best practices
   Minimum touch target: 44x44px (Apple HIG)
   Optimized for thumb navigation
*/

/* Mobile Typography Scale - Optimized for readability */
@media (max-width: 768px) {
  :root {
    /* Adjusted type scale for mobile */
    --text-xs: 0.875rem;    /* 14px - increased from 12px */
    --text-sm: 1rem;        /* 16px - increased from 14px */
    --text-base: 1.125rem;  /* 18px - increased from 17px */
    --text-lg: 1.375rem;    /* 22px - increased from 20px */
    --text-xl: 1.625rem;    /* 26px - decreased from 24px */
    --text-2xl: 2rem;       /* 32px - decreased from 30px */
    --text-3xl: 2.5rem;     /* 40px - decreased from 36px */
    --text-4xl: 3rem;       /* 48px - same */
    --text-5xl: 3.5rem;     /* 56px - decreased from 60px */
    --text-6xl: 4rem;       /* 64px - decreased from 72px */
    
    /* Increased line heights for mobile readability */
    --leading-normal: 1.6;
    --leading-relaxed: 1.75;
    --leading-loose: 1.875;
    
    /* Content-specific scales for mobile */
    --article-font-size-mobile: 1.125rem; /* 18px for articles */
    --ui-font-size-mobile: 1rem;         /* 16px for UI */
    --nav-font-size-mobile: 1.0625rem;   /* 17px for navigation */
    
    /* Vertical rhythm for mobile */
    --baseline-mobile: 0.5rem;
    --paragraph-spacing-mobile: 1.5em;
  }
  
  /* Base typography adjustments */
  body {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    -webkit-text-size-adjust: 100%; /* Prevent iOS text size adjust */
    
    /* Enhanced font rendering for mobile */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeSpeed; /* Better performance on mobile */
    
    /* Fix for thin text on iOS - subtle stroke */
    -webkit-text-stroke: 0.35px;
  }
  
  /* Improved paragraph spacing */
  p {
    margin-bottom: var(--space-lg);
  }
}

/* Fix iOS viewport height issues */
@supports (-webkit-touch-callout: none) {
  .apple-hero,
  .apple-nav-menu,
  .mobile-nav-menu {
    min-height: -webkit-fill-available;
  }
}

/* Mobile Navigation Styles */
.mobile-nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1002;
  color: var(--apple-black);
  -webkit-tap-highlight-color: transparent;
}

.hamburger-icon {
  width: 24px;
  height: 24px;
  transition: transform var(--transition-base);
}

.hamburger-line {
  transition: all var(--transition-base);
  transform-origin: center;
}

/* Mobile Nav Overlay */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 999;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

/* Mobile Nav Menu */
.mobile-nav-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 85%;
  max-width: 375px;
  height: 100%;
  height: 100vh;
  height: -webkit-fill-available;
  background: var(--apple-white);
  transition: right var(--transition-base);
  z-index: 1001;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch; /* Momentum scrolling on iOS */
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.15);
}

.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--apple-gray-light);
}

.mobile-nav-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--apple-black);
}

.mobile-nav-close {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--apple-gray);
  -webkit-tap-highlight-color: transparent;
}

.mobile-nav-links {
  padding: var(--space-md) 0;
}

.mobile-nav-link {
  display: block;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--text-lg);
  color: var(--apple-black);
  text-decoration: none;
  transition: background-color var(--transition-fast);
  position: relative;
  min-height: 44px; /* Ensure 44px touch target */
}

.mobile-nav-link:active {
  background-color: var(--apple-gray-lighter);
}

/* Menu open state */
body.menu-open {
  overflow: hidden;
  position: fixed;
  width: 100%;
}

body.menu-open .mobile-nav-overlay {
  opacity: 1;
  visibility: visible;
}

body.menu-open .mobile-nav-menu {
  right: 0;
}

/* Hamburger animation */
body.menu-open .hamburger-line-top {
  transform: rotate(45deg) translateY(6px);
}

body.menu-open .hamburger-line-middle {
  opacity: 0;
  transform: scaleX(0);
}

body.menu-open .hamburger-line-bottom {
  transform: rotate(-45deg) translateY(-6px);
}

/* Touch-friendly spacing for all interactive elements */
@media (max-width: 768px) {
  /* Show mobile nav, hide desktop nav links */
  .mobile-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .apple-nav-menu {
    display: none;
  }
  
  /* Increase tap targets for all links and buttons */
  .apple-btn,
  .btn {
    min-height: 44px;
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--text-base);
  }
  
  /* Full-width buttons on mobile */
  .apple-hero-cta,
  .apple-connect-options,
  .about-cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  
  .apple-hero-cta .apple-btn,
  .apple-connect-options .apple-btn,
  .about-cta-buttons .btn {
    width: 100%;
    justify-content: center;
  }
  
  /* Improved spacing */
  .apple-nav-container {
    padding: 0 var(--space-md);
    height: 56px; /* Slightly taller on mobile */
  }
  
  /* Better content spacing */
  .apple-hero {
    padding-top: calc(56px + var(--space-3xl));
    padding-bottom: var(--space-3xl);
  }
  
  .apple-container {
    padding: 0 var(--space-md);
  }
  
  /* Improved article readability */
  .apple-article {
    padding: var(--space-3xl) var(--space-md);
  }
  
  .apple-article-content {
    font-size: var(--text-base);
    line-height: var(--leading-loose);
  }
  
  /* Stack grids on mobile */
  .apple-feature-grid,
  .apple-philosophy-grid,
  .apple-blog-preview,
  .philosophy-grid,
  .values-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  
  /* Optimize cards for mobile */
  .apple-feature-card,
  .apple-blog-preview-item,
  .philosophy-item,
  .value-card {
    padding: var(--space-md);
  }
  
  /* Better image handling */
  img {
    max-width: 100%;
    height: auto;
  }
  
  /* Improved form inputs */
  input[type="text"],
  input[type="email"],
  input[type="tel"],
  textarea,
  select {
    font-size: 16px; /* Prevents zoom on iOS */
    min-height: 44px;
    padding: var(--space-sm);
  }
  
  /* Better code blocks */
  pre {
    font-size: 14px;
    padding: var(--space-md);
    border-radius: 8px;
  }
  
  /* Blog list improvements */
  .apple-blog-item {
    padding: var(--space-lg) 0;
  }
  
  .apple-blog-item-title {
    font-size: var(--text-2xl);
  }
  
  .apple-blog-item-excerpt {
    font-size: var(--text-base);
  }
}

/* Small mobile devices (iPhone SE, etc.) */
@media (max-width: 375px) {
  :root {
    /* Further reduced for very small screens */
    --text-4xl: 2.5rem;
    --text-5xl: 3rem;
    --text-6xl: 3.5rem;
  }
  
  .mobile-nav-menu {
    width: 90%;
  }
  
  /* Tighter spacing on small screens */
  .apple-container {
    padding: 0 var(--space-sm);
  }
  
  .apple-article {
    padding: var(--space-2xl) var(--space-sm);
  }
}

/* Landscape orientation adjustments */
@media (max-width: 768px) and (orientation: landscape) {
  .apple-hero {
    padding-top: calc(56px + var(--space-xl));
    padding-bottom: var(--space-xl);
  }
  
  .apple-hero-title {
    font-size: var(--text-5xl);
  }
}

/* High-resolution displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Thinner borders for retina displays */
  .mobile-nav-header {
    border-bottom-width: 0.5px;
  }
  
  .apple-blog-item {
    border-bottom-width: 0.5px;
  }
  
  /* Adjusted text stroke for high DPI screens */
  @media (max-width: 768px) {
    body {
      -webkit-text-stroke: 0.2px; /* Thinner stroke for retina */
    }
  }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  .mobile-nav-menu {
    background: #1c1c1e;
    color: #f2f2f7;
  }
  
  .mobile-nav-link {
    color: #f2f2f7;
  }
  
  .mobile-nav-link:active {
    background-color: #2c2c2e;
  }
  
  .mobile-nav-overlay {
    background: rgba(0, 0, 0, 0.6);
  }
}