/**
 * MOBILE THUMB ZONE OPTIMIZATION
 * Optimizes all touch targets for one-handed mobile use
 * Based on iOS and Android ergonomic guidelines
 * 
 * Thumb Zones:
 * - EASY: Bottom 1/3 of screen, corners reachable
 * - MEDIUM: Middle 1/3, requires slight stretch
 * - HARD: Top 1/3, requires hand repositioning
 * 
 * Goal: All primary actions in EASY zone, secondary in MEDIUM
 */

/* ====================================
   1. MINIMUM TOUCH TARGET SIZES
   ==================================== */

/**
 * Apple HIG: 44pt minimum (44px)
 * Android Material: 48dp minimum (48px)
 * We use 48px for better thumb accuracy
 */
@media (max-width: 768px) {
  /* All interactive elements */
  button,
  [role='button'],
  a.btn,
  input[type='submit'],
  input[type='button'],
  .mobile-nav__toggle,
  .mobile-nav a,
  .mobile-nav button,
  .sticky-cta-btn,
  .a11y-toolbar__btn,
  .ts-header__actions a,
  .cta-button,
  [onclick],
  [role='link'],
  [tabindex='0'] {
    min-height: 48px;
    min-width: 48px;
  }

  /* Form inputs - larger for easier tapping */
  input[type='text'],
  input[type='email'],
  input[type='tel'],
  input[type='number'],
  input[type='url'],
  input[type='search'],
  select,
  textarea {
    min-height: 52px;
    padding: 14px 16px;
    font-size: 16px; /* Prevents iOS zoom */
  }

  /* Checkboxes and radios - larger tap area */
  input[type='checkbox'],
  input[type='radio'] {
    min-width: 32px;
    min-height: 32px;
    margin: 8px;
  }

  /* Labels for checkboxes/radios - expand tap area */
  label:has(input[type='checkbox']),
  label:has(input[type='radio']) {
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 48px;
    padding: 8px 0;
    cursor: pointer;
  }
}

/* ====================================
   2. SPACING BETWEEN TOUCH TARGETS
   ==================================== */

/**
 * WCAG 2.5.8: Target Size Spacing (AAA)
 * Minimum 8px spacing between targets
 * We use 12px for better accuracy
 */
@media (max-width: 768px) {
  /* Button groups - adequate spacing */
  .btn-group button,
  .btn-group .btn,
  .ts-header__actions a {
    margin: 6px;
  }

  /* Navigation links - vertical spacing */
  .mobile-nav__list > li {
    margin-bottom: 8px;
  }

  .mobile-nav__list a,
  .mobile-nav__list button {
    padding: 14px 20px;
    margin: 4px 0;
  }

  /* Form fields - spacing */
  .form-field,
  .form-group {
    margin-bottom: 20px;
  }

  /* Sticky CTA buttons - spacing */
  .sticky-cta-bar {
    gap: 8px;
    padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
  }
}

/* ====================================
   3. STICKY CTA - THUMB ZONE OPTIMIZED
   ==================================== */

/**
 * Position: Bottom (EASY thumb zone)
 * Height: 72px (comfortable thumb reach)
 * Safe area: iOS notch/home indicator support
 */
@media (max-width: 768px) {
  /* Sticky CTA bar - core styles in /assets/css/components/sticky-mobile-cta.css */
  .sticky-cta-bar {
    /* Thumb zone optimizations only - don't override base styles */
  }
}

/* Extra small phones - handled in sticky-mobile-cta.css */

/* ====================================
   4. MOBILE NAV TOGGLE - THUMB OPTIMIZED
   ==================================== */

/**
 * Position: Top right (easily reachable with thumb)
 * Size: 48x48px minimum
 */
@media (max-width: 768px) {
  .mobile-nav__toggle {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;

    /* Thumb-friendly size */
    width: 48px;
    height: 48px;
    min-width: 48px;
    min-height: 48px;
    padding: 12px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;

    /* Remove tap highlight */
    -webkit-tap-highlight-color: transparent;
  }

  .mobile-nav__toggle:active {
    background: rgb(201 162 39 / 10%);
    transform: scale(0.95);
  }

  /* Hamburger lines */
  .mobile-nav__toggle .hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* Animated hamburger to X */
  .mobile-nav__toggle[aria-expanded='true'] .hamburger:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .mobile-nav__toggle[aria-expanded='true'] .hamburger:nth-child(2) {
    opacity: 0%;
    transform: scaleX(0);
  }

  .mobile-nav__toggle[aria-expanded='true'] .hamburger:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

/* ====================================
   5. MOBILE NAV DRAWER - THUMB FRIENDLY
   ==================================== */

/**
 * Full-screen drawer with large tap targets
 * Links sized for easy thumb tapping
 */
@media (max-width: 768px) {
  .mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    background: rgb(0 0 0 / 95%);
    backdrop-filter: blur(10px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;

    /* Slide in from right */
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .mobile-nav[aria-hidden='false'] {
    transform: translateX(0);
  }

  /* Nav header with close button */
  .mobile-nav__header {
    display: flex;
    justify-content: flex-end;
    padding: 16px;
    padding-top: calc(16px + env(safe-area-inset-top));
  }

  .mobile-nav__close {
    /* Thumb-friendly close button */
    width: 48px;
    height: 48px;
    min-width: 48px;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgb(255 255 255 / 10%);
    border: none;
    border-radius: 50%;
    color: #ffffff;
    font-size: 24px;
    font-weight: 300;
    cursor: pointer;
    transition: all 0.2s;
    -webkit-tap-highlight-color: transparent;
  }

  .mobile-nav__close:active {
    background: rgb(255 255 255 / 20%);
    transform: scale(0.9);
  }

  /* Nav body */
  .mobile-nav__body {
    padding: 0 20px;
    padding-bottom: calc(80px + env(safe-area-inset-bottom)); /* Space for sticky CTA */
  }

  /* Nav list */
  .mobile-nav__list {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .mobile-nav__list > li {
    border-bottom: 1px solid rgb(255 255 255 / 10%);
  }

  /* Nav links - LARGE tap targets */
  .mobile-nav__list a {
    display: block;
    padding: 18px 16px;
    min-height: 56px;
    color: #ffffff;
    font-size: 1.125rem;
    font-weight: 600;
    text-decoration: none;
    letter-spacing: 0.02em;
    transition: all 0.2s;
    -webkit-tap-highlight-color: transparent;
  }

  .mobile-nav__list a:active {
    background: rgb(201 162 39 / 10%);
    transform: translateX(4px);
  }

  /* Accordion triggers */
  .mobile-nav__accordion-trigger {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 18px 16px;
    min-height: 56px;
    background: transparent;
    border: none;
    color: #ffffff;
    font-size: 1.125rem;
    font-weight: 600;
    text-align: left;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: all 0.2s;
    -webkit-tap-highlight-color: transparent;
  }

  .mobile-nav__accordion-trigger:active {
    background: rgb(201 162 39 / 10%);
  }

  .mobile-nav__accordion-trigger .arrow {
    font-size: 1.25rem;
    transition: transform 0.3s;
  }

  .mobile-nav__accordion-trigger[aria-expanded='true'] .arrow {
    transform: rotate(90deg);
  }

  /* Submenu */
  .mobile-nav__submenu {
    list-style: none;
    padding: 0;
    margin: 0;
    background: rgb(255 255 255 / 5%);
  }

  .mobile-nav__submenu li {
    border-bottom: 1px solid rgb(255 255 255 / 5%);
  }

  .mobile-nav__submenu a {
    padding: 14px 24px;
    min-height: 52px;
    font-size: 1rem;
    font-weight: 500;
    color: rgb(255 255 255 / 90%);
  }

  /* CTA button in nav */
  .mobile-nav__cta {
    background: linear-gradient(
      135deg,
      var(--tiller-color-gold, #c9a227),
      var(--tiller-color-gold-dark, #9a7a1a)
    ) !important;
    color: #000000 !important;
    border-radius: 12px;
    margin-top: 16px;
    text-align: center;
  }
}

/* ====================================
   6. ACCESSIBILITY TOOLBAR - THUMB ZONE
   ==================================== */

/**
 * Position: Bottom right (easy thumb reach)
 * Size: 56px toggle button
 */
@media (max-width: 768px) {
  .a11y-toolbar {
    bottom: calc(72px + 16px + env(safe-area-inset-bottom)); /* Above sticky CTA */
    right: 16px;
  }

  .a11y-toolbar__toggle {
    width: 56px;
    height: 56px;
    min-width: 56px;
    min-height: 56px;

    /* Larger tap target */
    padding: 16px;

    /* Enhanced visual feedback */
    box-shadow:
      0 4px 16px rgb(0 0 0 / 30%),
      0 0 20px rgb(16 185 129 / 20%);
  }

  .a11y-toolbar__toggle:active {
    transform: scale(0.92);
  }

  /* Panel positioning */
  .a11y-toolbar__panel {
    bottom: 72px; /* Above toggle */
    right: 0;
    max-width: calc(100vw - 32px);
    max-height: calc(100vh - 200px);
    overflow-y: auto;
  }
}

/* Extra small - adjust a11y position */
@media (max-width: 375px) {
  .a11y-toolbar {
    bottom: calc(64px + 12px + env(safe-area-inset-bottom));
    right: 12px;
  }

  .a11y-toolbar__toggle {
    width: 52px;
    height: 52px;
  }
}

/* ====================================
   7. FORM BUTTONS - THUMB OPTIMIZED
   ==================================== */

/**
 * Large, easy-to-tap submit buttons
 * Positioned for thumb reach
 */
@media (max-width: 768px) {
  /* Submit buttons */
  button[type='submit'],
  input[type='submit'],
  .form-submit,
  .btn--submit {
    width: 100%;
    min-height: 56px;
    padding: 16px 24px;
    font-size: 1.125rem;
    border-radius: 12px;

    /* Sticky to bottom for long forms */
    margin-top: 24px;
  }

  /* Button groups - stack vertically on mobile */
  .btn-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }

  .btn-group .btn {
    width: 100%;
    min-height: 52px;
  }

  /* Secondary buttons */
  .btn--secondary,
  .btn--ghost {
    min-height: 48px;
  }
}

/* ====================================
   8. HEADER ACTIONS - THUMB FRIENDLY
   ==================================== */

/**
 * Header CTAs optimized for thumb tapping
 */
@media (max-width: 768px) {
  .ts-header__actions {
    display: flex;
    gap: 8px;
  }

  .ts-header__actions a,
  .ts-header__actions .btn {
    min-height: 44px;
    min-width: auto;
    padding: 10px 16px;
    font-size: 0.875rem;
    white-space: nowrap;
  }

  /* Primary CTA larger */
  .ts-header__actions .btn--primary {
    min-height: 48px;
    padding: 12px 20px;
    font-weight: 700;
  }
}

/* ====================================
   9. SCROLL TO TOP - THUMB ACCESSIBLE
   ==================================== */

/**
 * Bottom right, above sticky CTA
 * Large enough for easy thumb tap
 */
@media (max-width: 768px) {
  .scroll-to-top {
    position: fixed;
    bottom: calc(72px + 80px + env(safe-area-inset-bottom)); /* Above CTA and a11y */
    right: 16px;
    z-index: 9997;
    width: 52px;
    height: 52px;
    min-width: 52px;
    min-height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgb(26 42 58 / 90%);
    color: #ffffff;
    border: 2px solid rgb(201 162 39 / 30%);
    border-radius: 50%;
    box-shadow: 0 4px 12px rgb(0 0 0 / 30%);
    transition: all 0.3s;
    -webkit-tap-highlight-color: transparent;
  }

  .scroll-to-top:active {
    transform: scale(0.9);
  }
}

/* ====================================
   10. LANDSCAPE ORIENTATION
   ==================================== */

/**
 * Adjust for landscape mode (shorter height)
 */
@media (max-width: 768px) and (orientation: landscape) {
  /* Reduce sticky CTA height */
  .sticky-cta-bar {
    min-height: 60px;
    padding: 8px 12px;
    padding-bottom: calc(8px + env(safe-area-inset-bottom));
  }

  .sticky-cta-btn {
    min-height: 48px;
    padding: 8px 6px;
  }

  /* Adjust a11y toolbar */
  .a11y-toolbar {
    bottom: calc(60px + 12px + env(safe-area-inset-bottom));
  }

  .a11y-toolbar__toggle {
    width: 48px;
    height: 48px;
  }
}

/* ====================================
   11. REDUCE MOTION
   ==================================== */

/**
 * Respect user preferences
 */
@media (prefers-reduced-motion: reduce) and (max-width: 768px) {
  .sticky-cta-btn,
  .mobile-nav__toggle,
  .mobile-nav,
  .a11y-toolbar__toggle {
    transition: none !important;
  }
}

/* ====================================
   12. SAFE AREA SUPPORT
   ==================================== */

/**
 * Full support for iPhone notch and home indicator
 */
@supports (padding: env(safe-area-inset-bottom)) {
  @media (max-width: 768px) {
    .sticky-cta-bar {
      padding-bottom: calc(12px + env(safe-area-inset-bottom));
    }

    .mobile-nav__body {
      padding-bottom: calc(80px + env(safe-area-inset-bottom));
    }

    .mobile-nav__header {
      padding-top: calc(16px + env(safe-area-inset-top));
    }
  }
}