/**
 * Form Elements
 * 
 * Standardized form elements for Collekton UI.
 * Includes validation states and HTMX integration.
 */

/* =========================================
 * FORM STRUCTURE
 * ========================================= */

.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-row {
  display: grid;
  gap: var(--space-4);
}

.form-row-2 {
  grid-template-columns: repeat(2, 1fr);
}

.form-row-3 {
  grid-template-columns: repeat(3, 1fr);
}

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

.form-inline {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* =========================================
 * LABELS
 * ========================================= */

.label,
label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-neutral-700);
}

.label-required::after {
  content: ' *';
  color: var(--color-error-500);
}

.label-optional::after {
  content: ' (optional)';
  font-weight: var(--font-normal);
  color: var(--color-neutral-400);
}

/* =========================================
 * INPUT BASE STYLES
 * ========================================= */

.input,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="url"],
input[type="search"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
textarea,
select {
  display: block;
  width: 100%;
  height: var(--input-height);
  padding: 0 var(--input-padding-x);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-neutral-900);
  background-color: var(--color-neutral-0);
  border: 1px solid var(--input-border-color);
  border-radius: var(--input-radius);
  transition: border-color var(--duration-150) var(--ease-in-out),
              box-shadow var(--duration-150) var(--ease-in-out);
}

.input::placeholder,
input::placeholder,
textarea::placeholder {
  color: var(--color-neutral-400);
}

.input:hover,
input:hover,
textarea:hover,
select:hover {
  border-color: var(--color-neutral-400);
}

.input:focus,
input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--input-focus-border-color);
  box-shadow: 0 0 0 3px rgba(216, 147, 43, 0.15);
}

/* =========================================
 * INPUT SIZES
 * ========================================= */

.input-sm {
  height: var(--input-height-sm);
  font-size: var(--text-sm);
  padding: 0 var(--space-2-5);
}

.input-lg {
  height: var(--input-height-lg);
  font-size: var(--text-lg);
  padding: 0 var(--space-4);
}

/* =========================================
 * TEXTAREA
 * ========================================= */

textarea,
.textarea {
  height: auto;
  min-height: 120px;
  padding: var(--space-3) var(--input-padding-x);
  resize: vertical;
}

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

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

/* =========================================
 * SELECT
 * ========================================= */

select,
.select {
  appearance: none;
  cursor: pointer;
  padding-right: 2.25rem; /* 36px: room for 16px chevron + spacing */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2378716c'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-position: right 0.625rem center; /* ~10px from right */
  background-repeat: no-repeat;
  background-size: 16px;
}

select:focus {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23d8932b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
}

/* =========================================
 * CHECKBOX & RADIO
 * ========================================= */

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

.checkbox-group-inline,
.radio-group-inline {
  flex-direction: row;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.checkbox-label,
.radio-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-weight: var(--font-normal);
  color: var(--color-neutral-800);
}

.checkbox,
input[type="checkbox"],
.radio,
input[type="radio"] {
  appearance: none;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  border: 2px solid var(--color-neutral-400);
  background-color: var(--color-neutral-0);
  cursor: pointer;
  transition: all var(--duration-150) var(--ease-in-out);
}

.checkbox,
input[type="checkbox"] {
  border-radius: var(--radius-sm);
}

.radio,
input[type="radio"] {
  border-radius: var(--radius-full);
}

.checkbox:hover,
input[type="checkbox"]:hover,
.radio:hover,
input[type="radio"]:hover {
  border-color: var(--color-accent-500);
}

.checkbox:checked,
input[type="checkbox"]:checked {
  background-color: var(--color-accent-500);
  border-color: var(--color-accent-500);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='white' stroke-width='3'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M5 13l4 4L19 7'%3E%3C/path%3E%3C/svg%3E");
  background-size: 12px;
  background-position: center;
  background-repeat: no-repeat;
}

.radio:checked,
input[type="radio"]:checked {
  background-color: var(--color-neutral-0);
  border-color: var(--color-accent-500);
  border-width: 5px;
}

.checkbox:focus,
input[type="checkbox"]:focus,
.radio:focus,
input[type="radio"]:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(216, 147, 43, 0.15);
}

/* =========================================
 * TOGGLE / SWITCH
 * ========================================= */

.toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.toggle-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-track {
  position: relative;
  width: 44px;
  height: 24px;
  background-color: var(--color-neutral-300);
  border-radius: var(--radius-full);
  transition: background-color var(--duration-200) var(--ease-in-out);
}

.toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background-color: var(--color-neutral-0);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-200) var(--ease-in-out);
}

.toggle-input:checked + .toggle-track {
  background-color: var(--color-accent-500);
}

.toggle-input:checked + .toggle-track .toggle-thumb {
  transform: translateX(20px);
}

.toggle-input:focus + .toggle-track {
  box-shadow: 0 0 0 3px rgba(216, 147, 43, 0.15);
}

/* =========================================
 * FILE INPUT
 * ========================================= */

.file-input {
  display: none;
}

.file-upload {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-8);
  border: 2px dashed var(--color-neutral-300);
  border-radius: var(--radius-lg);
  background-color: var(--color-neutral-50);
  cursor: pointer;
  transition: all var(--duration-150) var(--ease-in-out);
}

.file-upload:hover {
  border-color: var(--color-accent-400);
  background-color: var(--color-accent-50);
}

.file-upload-icon {
  width: 48px;
  height: 48px;
  color: var(--color-neutral-400);
}

.file-upload-text {
  font-size: var(--text-sm);
  color: var(--color-neutral-600);
}

.file-upload-hint {
  font-size: var(--text-xs);
  color: var(--color-neutral-400);
}

/* =========================================
 * INPUT GROUP (with addon)
 * ========================================= */

.input-group {
  display: flex;
  align-items: stretch;
}

.input-group .input,
.input-group input {
  border-radius: 0;
  flex: 1;
}

.input-group .input:first-child,
.input-group input:first-child {
  border-radius: var(--input-radius) 0 0 var(--input-radius);
}

.input-group .input:last-child,
.input-group input:last-child {
  border-radius: 0 var(--input-radius) var(--input-radius) 0;
}

.input-addon {
  display: flex;
  align-items: center;
  padding: 0 var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-neutral-600);
  background-color: var(--color-neutral-100);
  border: 1px solid var(--input-border-color);
}

.input-addon:first-child {
  border-right: none;
  border-radius: var(--input-radius) 0 0 var(--input-radius);
}

.input-addon:last-child {
  border-left: none;
  border-radius: 0 var(--input-radius) var(--input-radius) 0;
}

/* =========================================
 * VALIDATION STATES
 * ========================================= */

/* Error state */
.input-error,
.is-invalid {
  border-color: var(--color-error-500) !important;
}

.input-error:focus,
.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15) !important;
}

/* Success state */
.input-success,
.is-valid {
  border-color: var(--color-success-500) !important;
}

.input-success:focus,
.is-valid:focus {
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15) !important;
}

/* Warning state */
.input-warning {
  border-color: var(--color-warning-500) !important;
}

.input-warning:focus {
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15) !important;
}

/* Help text and error messages */
.form-hint {
  font-size: var(--text-sm);
  color: var(--color-neutral-500);
  margin-top: var(--space-1);
}

.form-error {
  font-size: var(--text-sm);
  color: var(--color-error-600);
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.form-success {
  font-size: var(--text-sm);
  color: var(--color-success-600);
  margin-top: var(--space-1);
}

/* =========================================
 * DISABLED & READONLY STATES
 * ========================================= */

.input:disabled,
input:disabled,
textarea:disabled,
select:disabled,
.input-disabled {
  background-color: var(--color-neutral-100);
  color: var(--color-neutral-400);
  cursor: not-allowed;
  opacity: 0.7;
}

.input:read-only,
input:read-only,
textarea:read-only {
  background-color: var(--color-neutral-50);
  cursor: default;
}

/* =========================================
 * BUTTONS
 * ========================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: var(--btn-height);
  padding: 0 var(--btn-padding-x);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: 1;
  text-decoration: none;
  border-radius: var(--btn-radius);
  cursor: pointer;
  transition: all var(--duration-150) var(--ease-in-out);
  white-space: nowrap;
  border: none;
}

.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Button sizes */
.btn-sm {
  height: var(--btn-height-sm);
  padding: 0 var(--space-3);
  font-size: var(--text-xs);
}

.btn-lg {
  height: var(--btn-height-lg);
  padding: 0 var(--space-6);
  font-size: var(--text-base);
}

.btn-icon {
  width: var(--btn-height);
  padding: 0;
}

.btn-icon.btn-sm {
  width: var(--btn-height-sm);
}

.btn-icon.btn-lg {
  width: var(--btn-height-lg);
}

/* Primary button */
.btn-primary {
  background-color: var(--color-accent-500);
  color: var(--color-neutral-0);
}

.btn-primary:hover {
  background-color: var(--color-accent-600);
}

.btn-primary:active {
  background-color: var(--color-accent-700);
}

/* Secondary button */
.btn-secondary {
  background-color: var(--color-neutral-200);
  color: var(--color-neutral-800);
}

.btn-secondary:hover {
  background-color: var(--color-neutral-300);
}

.btn-secondary:active {
  background-color: var(--color-neutral-400);
}

/* Outline button */
.btn-outline {
  background-color: transparent;
  border: 1px solid var(--color-neutral-300);
  color: var(--color-neutral-700);
}

.btn-outline:hover {
  background-color: var(--color-neutral-100);
  border-color: var(--color-neutral-400);
}

.btn-outline-primary {
  border-color: var(--color-accent-500);
  color: var(--color-accent-600);
}

.btn-outline-primary:hover {
  background-color: var(--color-accent-50);
}

/* Ghost button */
.btn-ghost {
  background-color: transparent;
  color: var(--color-neutral-700);
}

.btn-ghost:hover {
  background-color: var(--color-neutral-100);
}

/* Danger button */
.btn-danger {
  background-color: var(--color-error-500);
  color: var(--color-neutral-0);
}

.btn-danger:hover {
  background-color: var(--color-error-600);
}

.btn-danger:active {
  background-color: var(--color-error-700);
}

/* Success button */
.btn-success {
  background-color: var(--color-success-500);
  color: var(--color-neutral-0);
}

.btn-success:hover {
  background-color: var(--color-success-600);
}

/* Link button */
.btn-link {
  background-color: transparent;
  color: var(--color-accent-600);
  padding: 0;
  height: auto;
}

.btn-link:hover {
  text-decoration: underline;
}

/* Full width button */
.btn-block {
  width: 100%;
}

/* Button group */
.btn-group {
  display: inline-flex;
}

.btn-group .btn {
  border-radius: 0;
}

.btn-group .btn:first-child {
  border-radius: var(--btn-radius) 0 0 var(--btn-radius);
}

.btn-group .btn:last-child {
  border-radius: 0 var(--btn-radius) var(--btn-radius) 0;
}

.btn-group .btn + .btn {
  margin-left: -1px;
}

/* =========================================
 * HTMX LOADING STATES
 * ========================================= */

/* Loading indicator in button */
.btn.htmx-request {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn.htmx-request::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: var(--radius-full);
  animation: btn-spinner 0.6s linear infinite;
}

.btn-primary.htmx-request::after {
  border-color: var(--color-neutral-0);
  border-right-color: transparent;
}

@keyframes btn-spinner {
  to {
    transform: rotate(360deg);
  }
}

/* Input loading state */
.input.htmx-request,
input.htmx-request {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cstyle%3E.spinner%7Banimation:spin 1s linear infinite;transform-origin:center%7D@keyframes spin%7Bfrom%7Btransform:rotate(0deg)%7Dto%7Btransform:rotate(360deg)%7D%7D%3C/style%3E%3Ccircle class='spinner' cx='12' cy='12' r='8' stroke='%23d8932b' stroke-width='2' fill='none' stroke-dasharray='40' stroke-linecap='round'/%3E%3C/svg%3E");
  background-position: right 0.5rem center; /* ~8px from right */
  background-repeat: no-repeat;
  background-size: 18px;
  padding-right: 2rem; /* 32px: room for 18px spinner + spacing */
}

/* Form submitting state */
form.htmx-request {
  opacity: 0.7;
  pointer-events: none;
}

/* =========================================
 * SEARCH INPUT
 * ========================================= */

.search-input {
  padding-left: 2.25rem !important; /* 36px: room for 16px icon + spacing */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2378716c'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z'%3E%3C/path%3E%3C/svg%3E");
  background-position: left 0.625rem center; /* ~10px from left */
  background-repeat: no-repeat;
  background-size: 16px;
}

/* =========================================
 * RANGE INPUT
 * ========================================= */

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--color-neutral-200);
  border-radius: var(--radius-full);
  outline: none;
  padding: 0;
  border: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--color-accent-500);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-150) var(--ease-in-out);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--color-accent-500);
  border-radius: var(--radius-full);
  cursor: pointer;
  border: none;
}

/* =========================================
 * COLOR INPUT
 * ========================================= */

input[type="color"] {
  width: 60px;
  height: var(--input-height);
  padding: var(--space-1);
  cursor: pointer;
}

input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: var(--radius-sm);
}