/* Remove default appearance */
input,
textarea,
select,
button {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  /* Removes browser default styling */
}

/* Apply custom box model */
input,
textarea,
select {
  font-family: inherit;
  font-size: 16px;
  /* 16px prevents auto-zoom on iOS */
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  box-sizing: border-box;
}

/* Default state */
input,
textarea,
select {
  background: white;
  color: #333;
  transition: all 0.2s ease;
}

/* Focus state (essential for accessibility) */
input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: #3498db;
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Placeholder styling */
input::placeholder,
textarea::placeholder {
  color: #999;
  opacity: 1;
  /* opacity: 1 ensures visible in all browsers */
}

/* Disabled state */
input:disabled,
textarea:disabled,
select:disabled {
  background: #f5f5f5;
  color: #999;
  cursor: not-allowed;
  border-color: #ddd;
}

/* Basic text input */
input[type="text"] {
  width: 100%;
  padding: 10px;
  font-size: 16px;
  border: 1px solid #ddd;
  border-radius: 4px;
  box-sizing: border-box;
}

/* Password input */
input[type="password"] {
  letter-spacing: 0.25em;
  /* Makes typed characters less obvious */
}

/* Email input with validation */
input[type="email"] {
  padding: 10px;
  border: 1px solid #ddd;
}

input[type="email"]:invalid {
  border-color: #e74c3c;
  background: rgba(231, 76, 60, 0.05);
}

input[type="email"]:valid {
  border-color: #2ecc71;
  background: rgba(46, 204, 113, 0.05);
}

/* Search input with clear button */
input[type="search"]::-webkit-search-cancel-button {
  appearance: none;
  width: 20px;
  height: 20px;
  background: url('clear-icon.svg');
  cursor: pointer;
}

/* Number input (hide spinner buttons) */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  appearance: none;
  margin: 0;
}

input[type="number"] {
  -moz-appearance: textfield;
}

/* Date input */
input[type="date"] {
  padding: 10px;
  border: 1px solid #ddd;
}

input[type="date"]::-webkit-calendar-picker-indicator {
  cursor: pointer;
}

/* Textarea */
textarea {
  width: 100%;
  font-family: monospace;
  font-size: 14px;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  resize: vertical;
  /* Allow vertical resize only */
  min-height: 120px;
}

textarea:focus {
  border-color: #3498db;
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Select/dropdown */
select {
  width: 100%;
  padding: 10px 12px;
  padding-right: 30px;
  /* Space for dropdown arrow */
  border: 1px solid #ddd;
  border-radius: 4px;
  background-color: white;
  background-image: url('data:image/svg+xml;...');
  /* Custom dropdown arrow */
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 16px;
}

select:focus {
  border-color: #3498db;
  outline: none;
}

/* Option styling (limited) */
option {
  padding: 10px;
  background: white;
  color: #333;
}

option:checked {
  background: #3498db;
  color: white;
}

/* Multiple select */
select[multiple] {
  height: auto;
  padding: 5px;
}

select[multiple] option {
  padding: 5px 10px;
}

/* Reset button default styles */
button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
  appearance: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 16px;
}

/* Primary button */
.button-primary {
  padding: 10px 20px;
  background: #3498db;
  color: white;
  border: none;
  border-radius: 4px;
  font-weight: 600;
  transition: all 0.2s ease;
}

.button-primary:hover {
  background: #2980b9;
  box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
}

.button-primary:active {
  transform: scale(0.98);
  /* Pressed effect */
}

.button-primary:focus-visible {
  outline: 3px solid #3498db;
  outline-offset: 2px;
}

.button-primary:disabled {
  background: #bdc3c7;
  cursor: not-allowed;
  opacity: 0.6;
}

/* Secondary button */
.button-secondary {
  padding: 10px 20px;
  background: white;
  color: #333;
  border: 2px solid #ddd;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.button-secondary:hover {
  border-color: #3498db;
  background: #f5f9ff;
}

/* Link button */
.button-link {
  background: none;
  border: none;
  color: #3498db;
  cursor: pointer;
  text-decoration: underline;
  font-size: inherit;
  padding: 0;
}

.button-link:hover {
  color: #2980b9;
}

/* Icon button */
.button-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  background: #f0f0f0;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.button-icon:hover {
  background: #e0e0e0;
}

/* Required field indicator */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 5px;
  font-weight: 600;
}

.form-label.required::after {
  content: ' *';
  color: #e74c3c;
}

/* Valid input */
input:valid {
  border-color: #2ecc71;
}

input:valid + .form-feedback {
  color: #2ecc71;
  display: block;
}

/* Invalid input */
input:invalid {
  border-color: #e74c3c;
}

input:invalid + .form-feedback {
  color: #e74c3c;
  display: block;
}

/* Form feedback message */
.form-feedback {
  display: none;
  font-size: 12px;
  margin-top: 4px;
}

/* Required validation */
input:required:invalid {
  border-color: #e74c3c;
  background: rgba(231, 76, 60, 0.05);
}

/* Pristine vs touched state */
input.pristine {
  border-color: #ddd;
}

input.touched:invalid {
  border-color: #e74c3c;
  background: rgba(231, 76, 60, 0.05);
}

/* Success state */
input.success {
  border-color: #2ecc71;
  background: rgba(46, 204, 113, 0.05);
}

input.success + .form-feedback {
  color: #2ecc71;
  display: block;
}

/* Always maintain visible focus indicator */
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
button:focus-visible {
  outline: 3px solid #3498db;
  outline-offset: 2px;
}

/* Sufficient color contrast */
.form-label {
  color: #333;
  /* Contrast ratio ≥ 4.5:1 */
}

/* Error messages clearly visible */
.form-error {
  color: #e74c3c;
  font-weight: 600;
  margin-top: 4px;
}

/* Large touch targets */
input,
button,
select {
  min-height: 44px;
  /* Minimum 44px for touchable elements */
}

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  input,
  textarea,
  select,
  button {
    transition: none;
  }
}

/* High contrast mode */
@media (prefers-contrast: more) {
  input:focus,
  button:focus {
    outline-width: 4px;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  input,
  textarea,
  select {
    background: #2d2d2d;
    color: #fff;
    border-color: #444;
  }

  input:focus,
  textarea:focus,
  select:focus {
    border-color: #5a9fd4;
  }
}

/* Inline form */
.form-inline {
  display: flex;
  gap: 10px;
  align-items: center;
}

.form-inline input {
  flex: 1;
}

/* Stacked form (mobile-first) */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 5px;
}

input {
  width: 100%;
}

@media (min-width: 768px) {
  .form-group-horizontal {
    display: flex;
    gap: 20px;
    align-items: center;
  }

  .form-group-horizontal .form-label {
    min-width: 100px;
    margin-bottom: 0;
  }

  .form-group-horizontal input {
    flex: 1;
  }
}

/* Floating label pattern */
.form-group {
  position: relative;
  margin-bottom: 20px;
}

.form-label {
  position: absolute;
  top: 50%;
  left: 12px;
  transform: translateY(-50%);
  transition: all 0.2s ease;
  color: #999;
}

input:focus ~ .form-label,
input:not(:placeholder-shown) ~ .form-label {
  top: -10px;
  left: 0;
  font-size: 12px;
  color: #3498db;
}