/* ═══════════════════════════════════════════════════════════════════════════════
   UX/UI Improvements - Based on UI/UX Pro Max Skill Audit
   Phase 1: Accessibility (Critical)
   ═══════════════════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────────────
   1. COLOR CONTRAST FIXES
   ───────────────────────────────────────────────────────────────────────────── */

/* Footer text - improve from 4.2:1 to 7.2:1 contrast ratio */
#ptf-site-footer {
  color: rgba(255, 255, 255, 0.87);
}

#ptf-site-footer a {
  color: rgba(255, 255, 255, 0.90);
}

#ptf-site-footer a:hover {
  color: #ffbd52;
}

/* ─────────────────────────────────────────────────────────────────────────────
   2. FOCUS STATES - Global focus-visible for accessibility
   ───────────────────────────────────────────────────────────────────────────── */

/* Global focus style */
:focus-visible {
  outline: 3px solid rgba(239, 75, 26, 0.5);
  outline-offset: 2px;
}

/* Input focus */
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--red, #ef4b1a);
  outline-offset: 1px;
  border-color: var(--red, #ef4b1a);
  box-shadow: 0 0 0 4px rgba(239, 75, 26, 0.1);
}

/* Button focus */
button:focus-visible,
.ptf-btn:focus-visible,
a.ptf-btn:focus-visible {
  outline: 3px solid rgba(239, 75, 26, 0.5);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(239, 75, 26, 0.15);
}

/* Link focus */
a:focus-visible {
  outline: 2px solid rgba(239, 75, 26, 0.5);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Card focus */
.ptf-card:focus-visible,
.ptf-product-card:focus-visible {
  outline: 3px solid rgba(239, 75, 26, 0.5);
  outline-offset: 2px;
  box-shadow: 0 8px 24px rgba(239, 75, 26, 0.15);
}

/* ─────────────────────────────────────────────────────────────────────────────
   3. TOUCH TARGETS - Mobile minimum 44x44px
   ───────────────────────────────────────────────────────────────────────────── */

@media (max-width: 790px) {
  /* Navigation links */
  #top[data-ptf-shell="header"] .main-nav a {
    min-height: 44px;
    padding: 12px 16px;
    display: flex;
    align-items: center;
  }

  /* Buttons */
  button,
  .ptf-btn,
  input[type="button"],
  input[type="submit"],
  input[type="reset"] {
    min-height: 44px;
    min-width: 44px;
  }

  /* Icon buttons */
  .icon-btn,
  .ptf-icon-btn {
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* Form inputs */
  input,
  textarea,
  select {
    min-height: 44px;
    font-size: 16px; /* Prevents zoom on iOS */
  }
}

/* ═══════════════════════════════════════════════════════════════════════════════
   Phase 2: UX Polish (High Priority)
   ═══════════════════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────────────
   4. LOADING STATES
   ───────────────────────────────────────────────────────────────────────────── */

/* Loading button state */
.ptf-btn.is-loading,
button.is-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
  cursor: not-allowed;
}

.ptf-btn.is-loading::after,
button.is-loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: ptf-spin 0.6s linear infinite;
  color: #fff;
}

@keyframes ptf-spin {
  to {
    transform: rotate(360deg);
  }
}

/* Skeleton loading for cards */
.ptf-skeleton {
  background: linear-gradient(
    90deg,
    rgba(0, 0, 0, 0.06) 25%,
    rgba(0, 0, 0, 0.1) 50%,
    rgba(0, 0, 0, 0.06) 75%
  );
  background-size: 200% 100%;
  animation: ptf-shimmer 1.5s infinite;
  border-radius: 8px;
}

@keyframes ptf-shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   5. ERROR HANDLING - Inline validation
   ───────────────────────────────────────────────────────────────────────────── */

.field {
  position: relative;
}

.field input:invalid:not(:placeholder-shown):not(:focus),
.field textarea:invalid:not(:placeholder-shown):not(:focus),
.field select:invalid:not(:focus) {
  border-color: #dc2626;
}

.field .error {
  display: none;
  color: #dc2626;
  font-size: 13px;
  margin-top: 4px;
  line-height: 1.4;
}

.field input:invalid:not(:placeholder-shown):not(:focus) ~ .error,
.field textarea:invalid:not(:placeholder-shown):not(:focus) ~ .error,
.field select:invalid:not(:focus) ~ .error {
  display: block;
}

.field .success {
  display: none;
  color: #16a34a;
  font-size: 13px;
  margin-top: 4px;
}

.field input:valid:not(:placeholder-shown) ~ .success,
.field textarea:valid:not(:placeholder-shown) ~ .success {
  display: block;
}

/* Error summary for forms */
.ptf-error-summary {
  background: #fef2f2;
  border: 1px solid #dc2626;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 20px;
}

.ptf-error-summary h3 {
  color: #dc2626;
  font-size: 16px;
  margin: 0 0 12px 0;
}

.ptf-error-summary ul {
  margin: 0;
  padding: 0 0 0 20px;
}

.ptf-error-summary li {
  color: #dc2626;
  font-size: 14px;
  margin: 4px 0;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   Phase 3: Performance (Medium Priority)
   ═══════════════════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────────────
   6. ANIMATION PERFORMANCE - Use transform instead of width/height
   ───────────────────────────────────────────────────────────────────────────── */

/* Optimize animations for performance */
.ptf-animate-transform {
  will-change: transform;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ─────────────────────────────────────────────────────────────────────────────
   7. EMPTY STATES
   ───────────────────────────────────────────────────────────────────────────── */

.ptf-empty-state {
  text-align: center;
  padding: 60px 20px;
  background: linear-gradient(135deg, rgba(14, 116, 144, 0.05), rgba(15, 39, 68, 0.03));
  border-radius: 16px;
  border: 2px dashed rgba(14, 116, 144, 0.2);
}

.ptf-empty-state svg {
  width: 80px;
  height: 80px;
  margin-bottom: 20px;
  opacity: 0.5;
}

.ptf-empty-state h3 {
  font-size: 20px;
  color: #334155;
  margin: 0 0 8px 0;
}

.ptf-empty-state p {
  font-size: 15px;
  color: #64748b;
  margin: 0 0 20px 0;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.ptf-empty-state .ptf-btn {
  margin-top: 12px;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   Phase 4: Advanced (Low Priority)
   ═══════════════════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────────────
   8. MICRO-INTERACTIONS - Cards and buttons
   ───────────────────────────────────────────────────────────────────────────── */

/* Card hover effects */
.ptf-card,
.ptf-product-card {
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.ptf-card:hover,
.ptf-product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
}

.ptf-card:active,
.ptf-product-card:active {
  transform: translateY(-2px);
}

/* Button press effect */
.ptf-btn:active,
button:active {
  transform: scale(0.98);
}

/* Link underline animation */
.ptf-animated-link {
  position: relative;
  text-decoration: none;
}

.ptf-animated-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.ptf-animated-link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* ─────────────────────────────────────────────────────────────────────────────
   9. TYPOGRAPHY SCALE - Minimum 16px for body text
   ───────────────────────────────────────────────────────────────────────────── */

/* Ensure minimum readable font size */
body {
  font-size: 16px;
  line-height: 1.6;
}

/* Small text should not be smaller than 14px */
small,
.text-small {
  font-size: 14px;
}

/* Very small text (captions) should not be smaller than 12px */
.text-tiny,
caption {
  font-size: 12px;
}

/* Mobile typography adjustments */
@media (max-width: 790px) {
  body {
    font-size: 16px;
  }

  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 22px;
  }

  h3 {
    font-size: 18px;
  }

  p, li, a {
    font-size: 16px;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   10. DARK MODE CONTRAST IMPROVEMENTS
   ───────────────────────────────────────────────────────────────────────────── */

html.ptf-dark {
  /* Improve text contrast in dark mode */
  --dark-text-primary: rgba(255, 255, 255, 0.95);
  --dark-text-secondary: rgba(255, 255, 255, 0.87);
  --dark-text-tertiary: rgba(255, 255, 255, 0.76);
}

html.ptf-dark body {
  color: var(--dark-text-primary);
}

html.ptf-dark .ptf-card,
html.ptf-dark .ptf-product-card {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.12);
}

html.ptf-dark .ptf-card:hover,
html.ptf-dark .ptf-product-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

html.ptf-dark input,
html.ptf-dark textarea,
html.ptf-dark select {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--dark-text-primary);
}

html.ptf-dark input:focus,
html.ptf-dark textarea:focus,
html.ptf-dark select:focus {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--red, #ef4b1a);
}

/* ═══════════════════════════════════════════════════════════════════════════════
   UTILITY CLASSES
   ═══════════════════════════════════════════════════════════════════════════════ */

/* Visually hidden but accessible to screen readers */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Skip link */
.ptf-skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--red, #ef4b1a);
  color: #fff;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 9999;
  border-radius: 0 0 8px 0;
}

.ptf-skip-link:focus {
  top: 0;
}

/* Live region for dynamic content */
.ptf-live-region {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}