/* ChamberAI Design System - Form Components */
/* Version 1.0.0 */

/* Form Container */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group--horizontal {
  flex-direction: row;
  align-items: center;
  gap: var(--space-4);
}

/* Labels */
label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  display: block;
  margin-bottom: var(--space-1);
}

label.required::after {
  content: " *";
  color: var(--color-error);
}

/* Base Input Styles */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="url"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
input[type="search"],
textarea,
select {
  display: block;
  width: 100%;
  padding: 12px 16px;
  font-size: var(--font-size-base);
  font-family: var(--font-body);
  line-height: 1.4;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
  box-sizing: border-box;
}

input[type="text"]::placeholder,
input[type="email"]::placeholder,
input[type="password"]::placeholder,
input[type="number"]::placeholder,
input[type="tel"]::placeholder,
input[type="url"]::placeholder,
input[type="date"]::placeholder,
input[type="time"]::placeholder,
input[type="datetime-local"]::placeholder,
input[type="search"]::placeholder,
textarea::placeholder {
  color: var(--color-text-tertiary);
}

/* Focus State */
input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="tel"]:focus,
input[type="url"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="datetime-local"]:focus,
input[type="search"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-50);
  background-color: var(--color-bg-primary);
}

/* Disabled State */
input:disabled,
input:disabled::placeholder,
textarea:disabled,
textarea:disabled::placeholder,
select:disabled {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-disabled);
  cursor: not-allowed;
  opacity: 0.6;
}

/* Error State */
input.error,
textarea.error,
select.error {
  border-color: var(--color-error);
  background-color: rgba(220, 53, 69, 0.02);
}

input.error:focus,
textarea.error:focus,
select.error:focus {
  box-shadow: 0 0 0 3px var(--color-error-50);
  border-color: var(--color-error);
}

/* Success State */
input.success,
textarea.success,
select.success {
  border-color: var(--color-success);
  background-color: rgba(0, 204, 102, 0.02);
}

input.success:focus,
textarea.success:focus,
select.success:focus {
  box-shadow: 0 0 0 3px var(--color-success-50);
  border-color: var(--color-success);
}

/* Textarea Specific */
textarea {
  resize: vertical;
  min-height: 120px;
  max-height: 400px;
}

textarea.small {
  min-height: 80px;
}

textarea.large {
  min-height: 200px;
}

/* Select Specific */
select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%230A0E27' viewBox='0 0 24 24'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
  padding-right: 40px;
}

select::-webkit-scrollbar {
  width: 8px;
}

select::-webkit-scrollbar-track {
  background: var(--color-bg-secondary);
}

select::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

/* Help Text & Error Messages */
.help-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
}

.error-text {
  font-size: var(--font-size-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.error-text::before {
  content: "⚠";
  font-weight: bold;
}

.success-text {
  font-size: var(--font-size-xs);
  color: var(--color-success);
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.success-text::before {
  content: "✓";
  font-weight: bold;
}

/* Checkbox */
.checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
}

.checkbox input[type="checkbox"] {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background-color: var(--color-bg-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.18s ease;
}

.checkbox input[type="checkbox"]:hover:not(:disabled) {
  border-color: var(--color-primary);
}

.checkbox input[type="checkbox"]:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox input[type="checkbox"]:checked::after {
  content: "✓";
  color: white;
  font-weight: bold;
  font-size: 14px;
}

.checkbox input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.checkbox input[type="checkbox"]:disabled {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-border-light);
  cursor: not-allowed;
}

.checkbox label {
  margin: 0;
  font-weight: 400;
  cursor: pointer;
  font-size: var(--font-size-base);
}

/* Checkbox Error */
.checkbox.error input[type="checkbox"] {
  border-color: var(--color-error);
}

.checkbox.error label {
  color: var(--color-error);
}

/* Radio Button */
.radio {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
}

.radio input[type="radio"] {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background-color: var(--color-bg-primary);
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.18s ease;
}

.radio input[type="radio"]:hover:not(:disabled) {
  border-color: var(--color-primary);
}

.radio input[type="radio"]:checked {
  border-color: var(--color-primary);
  box-shadow: inset 0 0 0 6px var(--color-primary);
}

.radio input[type="radio"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.radio input[type="radio"]:disabled {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-border-light);
  cursor: not-allowed;
}

.radio label {
  margin: 0;
  font-weight: 400;
  cursor: pointer;
  font-size: var(--font-size-base);
}

/* Radio Error */
.radio.error input[type="radio"] {
  border-color: var(--color-error);
}

.radio.error label {
  color: var(--color-error);
}

/* Checkbox/Radio Groups */
.checkbox-group,
.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.checkbox-group--horizontal,
.radio-group--horizontal {
  flex-direction: row;
  gap: var(--space-5);
  flex-wrap: wrap;
}

/* Toggle Switch */
.toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
}

.toggle input[type="checkbox"] {
  appearance: none;
  width: 44px;
  height: 24px;
  border: none;
  border-radius: 12px;
  background-color: var(--color-border);
  cursor: pointer;
  position: relative;
  transition: background-color 0.18s ease;
  flex-shrink: 0;
}

.toggle input[type="checkbox"]::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: white;
  left: 2px;
  top: 2px;
  transition: left 0.18s ease;
}

.toggle input[type="checkbox"]:checked {
  background-color: var(--color-success);
}

.toggle input[type="checkbox"]:checked::after {
  left: 22px;
}

.toggle input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.toggle label {
  margin: 0;
  font-weight: 400;
  cursor: pointer;
}

/* Input Field with Icon */
.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper input {
  width: 100%;
}

.input-wrapper--has-icon-left input {
  padding-left: 40px;
}

.input-wrapper--has-icon-right input {
  padding-right: 40px;
}

.input-icon {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-text-secondary);
  pointer-events: none;
}

.input-icon--left {
  left: 0;
}

.input-icon--right {
  right: 0;
}

.input-wrapper input:focus ~ .input-icon,
.input-wrapper--has-icon-left input:focus ~ .input-icon--left,
.input-wrapper--has-icon-right input:focus ~ .input-icon--right {
  color: var(--color-primary);
}

/* Character Counter */
.input-counter {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
}

.input-counter__current {
  font-weight: bold;
}

.input-counter__max {
  color: var(--color-text-tertiary);
}

textarea.limit-reached,
textarea.limit-reached:focus {
  border-color: var(--color-warning);
}

/* Input States - Loading */
input.is-loading,
textarea.is-loading,
select.is-loading {
  background-image: linear-gradient(90deg, transparent, rgba(0, 102, 204, 0.2), transparent);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

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

/* Responsive */
@media (max-width: 640px) {
  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="number"],
  input[type="tel"],
  input[type="url"],
  input[type="date"],
  input[type="time"],
  input[type="datetime-local"],
  input[type="search"],
  textarea,
  select {
    font-size: 16px; /* Prevents zoom on iOS */
  }

  .checkbox-group--horizontal,
  .radio-group--horizontal {
    flex-direction: column;
    gap: var(--space-3);
  }
}