/* 
 * Mobile-First UX Hardening Enhancements for CODED:UK
 * Critical fixes for mobile usability and accessibility
 */

/* ================================
   SKIP LINK ACCESSIBILITY
   ================================ */

.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary, #635bff);
  color: white;
  padding: 8px;
  border-radius: 4px;
  text-decoration: none;
  z-index: 9999;
  font-weight: 600;
  font-size: 0.875rem;
  transition: top 0.2s ease;
}

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

/* ================================
   SAFE AREA SUPPORT (iOS)
   ================================ */

/* Support for iOS safe areas */
body {
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

/* Adjust header for safe areas */
.header {
  padding-top: max(1rem, env(safe-area-inset-top));
}

/* ================================
   MOBILE NAVIGATION FIXES
   ================================ */

@media (max-width: 767px) {
  /* Ensure mobile menu button is always visible and accessible */
  .mobile-menu-button {
    display: flex !important;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: var(--text-primary, #ffffff);
    cursor: pointer;
    touch-action: manipulation;
    position: relative;
    z-index: 1001;
    transition: all 0.2s ease;
  }

  .mobile-menu-button:hover,
  .mobile-menu-button:focus {
    background: rgba(99, 91, 255, 0.2);
    border-color: rgba(99, 91, 255, 0.4);
    transform: scale(1.05);
  }

  .mobile-menu-button:focus {
    outline: 2px solid var(--color-primary, #635bff);
    outline-offset: 2px;
  }

  /* Fix navigation overlay */
  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(14, 20, 38, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    z-index: 1000;
    padding: 2rem;
    box-sizing: border-box;
    list-style: none;
    margin: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .nav-links.show {
    display: flex !important;
    transform: translateX(0);
  }

  /* Navigation link styling for mobile */
  .nav-links .nav-link,
  .nav-links a[class*="btn"] {
    font-size: 1.125rem;
    padding: 1rem 2rem;
    border-radius: 12px;
    min-height: 44px;
    min-width: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #ffffff !important;
    text-decoration: none;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.2s ease;
    touch-action: manipulation;
    width: auto;
    max-width: 280px;
  }

  .nav-links .nav-link:hover,
  .nav-links .nav-link:focus,
  .nav-links a[class*="btn"]:hover,
  .nav-links a[class*="btn"]:focus {
    background: rgba(99, 91, 255, 0.2) !important;
    color: #ffffff !important;
    transform: translateY(-2px);
    border-color: rgba(99, 91, 255, 0.4);
  }

  /* Ensure list items are properly styled */
  .nav-links li {
    list-style: none;
    margin: 0;
    padding: 0;
    width: 100%;
    display: flex;
    justify-content: center;
  }
}

/* ================================
   HORIZONTAL SCROLL PREVENTION
   ================================ */

/* Prevent horizontal overflow on small screens */
html {
  overflow-x: hidden;
}

body {
  overflow-x: hidden;
}

/* Container safety at narrow widths */
.container {
  max-width: min(1200px, 100vw);
  margin: 0 auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
  box-sizing: border-box;
}

/* Prevent code blocks from causing overflow */
pre, code {
  max-width: 100%;
  overflow-x: auto;
  word-wrap: break-word;
}

/* Images responsive by default */
img {
  max-width: 100%;
  height: auto;
}

/* ================================
   TOUCH TARGET OPTIMIZATION
   ================================ */

/* Ensure all interactive elements meet WCAG 2.1 AA (44x44px minimum) */
button,
.btn,
a[class*="btn"],
input[type="submit"],
input[type="button"],
input[type="reset"],
.nav-link,
.mobile-menu-button {
  min-width: 44px;
  min-height: 44px;
  touch-action: manipulation;
}

/* Form inputs accessibility */
input,
textarea,
select {
  min-height: 44px;
  font-size: 16px; /* Prevent iOS zoom */
  touch-action: manipulation;
}

/* Link targets in content */
a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  touch-action: manipulation;
}

/* ================================
   FOCUS MANAGEMENT
   ================================ */

/* Enhanced focus styles for keyboard navigation */
*:focus {
  outline: 2px solid var(--color-primary, #635bff);
  outline-offset: 2px;
}

/* Focus trap for modal/overlay states */
.focus-trap {
  position: relative;
}

.focus-trap::before,
.focus-trap::after {
  content: '';
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* ================================
   BUTTON STANDARDIZATION
   ================================ */

/* Ensure consistent button styling across all button variations */
.btn,
button,
input[type="submit"],
input[type="button"],
input[type="reset"],
a[class*="btn"] {
  /* Base styling for all buttons */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: none;
  border-radius: var(--radius-lg, 12px);
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.5;
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
  
  /* Mobile-first sizing */
  padding: 0.75rem 1.5rem;
  min-height: 44px;
  min-width: 44px;
  touch-action: manipulation;
}

/* Full-width button variant for mobile */
@media (max-width: 767px) {
  .btn-full-width,
  .btn.btn-full-width {
    width: 100%;
  }
  
  /* Make primary action buttons full-width on mobile */
  .btn-primary {
    width: 100%;
    margin-bottom: 1rem;
  }
}

/* Button states */
.btn:hover,
button:hover,
input[type="submit"]:hover,
input[type="button"]:hover,
input[type="reset"]:hover,
a[class*="btn"]:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn:active,
button:active,
input[type="submit"]:active,
input[type="button"]:active,
input[type="reset"]:active,
a[class*="btn"]:active {
  transform: translateY(0);
}

/* Disabled state */
.btn:disabled,
button:disabled,
input[type="submit"]:disabled,
input[type="button"]:disabled,
input[type="reset"]:disabled,
a[class*="btn"][aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  pointer-events: none;
}

/* ================================
   ENHANCED ACCESSIBILITY
   ================================ */

/* Screen reader only text */
.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;
}

/* Better focus indicators */
*:focus-visible {
  outline: 3px solid var(--color-primary, #635bff);
  outline-offset: 2px;
}

/* Improve link accessibility */
a:not([class]) {
  color: var(--color-primary, #635bff);
  text-decoration: underline;
}

a:not([class]):hover {
  text-decoration: none;
}

/* ================================
   ERROR STATE IMPROVEMENTS
   ================================ */

/* Error messaging */
.error-message {
  color: var(--color-error, #ef4444);
  font-size: 0.875rem;
  margin-top: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.error-message::before {
  content: '⚠️';
  font-size: 1rem;
}

/* Success messaging */
.success-message {
  color: var(--color-success, #16a34a);
  font-size: 0.875rem;
  margin-top: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.success-message::before {
  content: '✓';
  font-size: 1rem;
  color: var(--color-success, #16a34a);
}

/* Loading state for buttons */
.btn[aria-busy="true"] {
  position: relative;
  pointer-events: none;
  opacity: 0.7;
}

.btn[aria-busy="true"]::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

@keyframes spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

/* ================================
   FORM ENHANCEMENTS
   ================================ */

/* Form error states */
.form-error {
  color: var(--color-error, #ef4444);
  font-size: 0.875rem;
  margin-top: 0.25rem;
  display: block;
}

/* Form field wrapper */
.form-field {
  margin-bottom: 1.5rem;
}

.form-field label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

/* Required field indicator */
.form-field.required label::after {
  content: ' *';
  color: var(--color-error, #ef4444);
}

/* Form validation states */
input:invalid,
textarea:invalid,
select:invalid {
  border-color: var(--color-error, #ef4444);
}

input:valid,
textarea:valid,
select:valid {
  border-color: var(--color-success, #16a34a);
}

/* ================================
   RESPONSIVE TYPOGRAPHY
   ================================ */

/* Fluid typography for better mobile readability */
h1 {
  font-size: clamp(1.875rem, 4vw, 3rem);
  line-height: 1.2;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.3;
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.875rem);
  line-height: 1.4;
}

/* Body text optimization */
p {
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.6;
}

/* ================================
   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) {
  .nav-links {
    background: rgba(0, 0, 0, 0.95);
  }
  
  .nav-link,
  .mobile-menu-button {
    border-width: 2px;
    border-color: currentColor;
  }
  
  *:focus {
    outline-width: 3px;
  }
}

/* ================================
   ULTRA-NARROW DEVICE SUPPORT (≤320px)
   ================================ */

@media (max-width: 320px) {
  /* Even more compact spacing for very small devices */
  .container {
    padding-inline: 1rem;
  }
  
  /* Reduce font sizes slightly on very narrow screens */
  h1 {
    font-size: clamp(1.5rem, 5vw, 2.5rem);
  }
  
  h2 {
    font-size: clamp(1.25rem, 4vw, 2rem);
  }
  
  /* Stack buttons vertically on very narrow screens */
  .btn-group {
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .btn-group .btn {
    width: 100%;
  }
  
  /* Reduce padding on cards */
  .card {
    padding: 1rem;
  }
  
  /* Compact form fields */
  .form-group {
    margin-bottom: 1rem;
  }
}

/* ================================
   PRINT STYLES
   ================================ */

@media print {
  .mobile-menu-button,
  .nav-links,
  .skip-link {
    display: none !important;
  }
}