/**
 * Forms System - Aprender21
 * Inputs, selects, buttons, checkboxes modernos
 * Reemplaza .form-control de Bootstrap
 */

/* ========== BASE FORM STYLES ========== */

.form-group {
  margin-bottom: var(--space-4);
}

.form-label,
label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
}

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

/* ========== TEXT INPUTS ========== */

.input,
.form-control,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="url"],
input[type="search"],
input[type="date"],
textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-gray-900);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  appearance: none;
  box-sizing: border-box; /* Incluir padding y border en el width */
}

.input::placeholder,
.form-control::placeholder,
textarea::placeholder {
  color: var(--color-gray-400);
}

/* Focus state */
.input:focus,
.form-control:focus,
input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Disabled state */
.input:disabled,
.form-control:disabled,
input:disabled,
textarea:disabled,
select:disabled {
  background-color: var(--color-gray-100);
  color: var(--color-gray-500);
  cursor: not-allowed;
  opacity: 0.6;
}

/* Error state */
.input-error,
.input.error,
input.error {
  border-color: var(--color-error);
}

.input-error:focus,
input.error:focus {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Success state */
.input-success,
input.success {
  border-color: var(--color-success);
}

/* Input sizes */
.input-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
}

.input-lg {
  padding: var(--space-4) var(--space-5);
  font-size: var(--font-size-lg);
}

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

textarea {
  resize: vertical;
  min-height: 100px;
}

textarea.resize-none {
  resize: none;
}

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

select,
.select {
  width: 100%;
  padding: var(--space-3) var(--space-10) var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-gray-900);
  background-color: var(--color-white);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23374151' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  background-size: 16px;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  appearance: none;
  box-sizing: border-box; /* Incluir padding y border en el width */
}

select:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.checkbox,
.radio {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-2);
}

input[type="checkbox"],
input[type="radio"] {
  width: 1.125rem;
  height: 1.125rem;
  margin-right: var(--space-2);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  appearance: none;
  background-color: var(--color-white);
  position: relative;
}

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

/* Checked state */
input[type="checkbox"]:checked,
input[type="radio"]:checked {
  background-color: var(--color-primary-600);
  border-color: var(--color-primary-600);
}

/* Checkmark */
input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  top: 1px;
  left: 5px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

/* Radio dot */
input[type="radio"]:checked::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  background-color: white;
  border-radius: var(--radius-full);
  transform: translate(-50%, -50%);
}

/* Focus state */
input[type="checkbox"]:focus,
input[type="radio"]:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Disabled state */
input[type="checkbox"]:disabled,
input[type="radio"]:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

/* ========== FORM MESSAGES ========== */

.form-help {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.form-error {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-error);
}

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

/* ========== INPUT GROUPS ========== */

.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-top-left-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
}

.input-group .input:last-child,
.input-group input:last-child {
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

.input-group-addon {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  background-color: var(--color-gray-100);
  border: 1px solid var(--color-gray-300);
  white-space: nowrap;
}

.input-group-addon:first-child {
  border-right: 0;
  border-top-left-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
}

.input-group-addon:last-child {
  border-left: 0;
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

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

.input-search {
  padding-left: var(--space-10);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' fill='%239ca3af' viewBox='0 0 20 20'%3E%3Cpath fill-rule='evenodd' d='M8 4a4 4 0 100 8 4 4 0 000-8zM2 8a6 6 0 1110.89 3.476l4.817 4.817a1 1 0 01-1.414 1.414l-4.816-4.816A6 6 0 012 8z' clip-rule='evenodd'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: left var(--space-3) center;
  background-size: 20px;
}

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

input[type="file"] {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  cursor: pointer;
}

input[type="file"]::file-selector-button {
  padding: var(--space-2) var(--space-4);
  margin-right: var(--space-3);
  color: var(--color-gray-700);
  background-color: var(--color-gray-100);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
}

input[type="file"]::file-selector-button:hover {
  background-color: var(--color-gray-200);
}

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

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

input[type="range"]::-webkit-slider-thumb {
  width: 20px;
  height: 20px;
  background: var(--color-primary-600);
  border-radius: var(--radius-full);
  cursor: pointer;
  appearance: none;
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--color-primary-600);
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
}

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

.switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-gray-300);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
}

.switch-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  border-radius: var(--radius-full);
  transition: var(--transition-base);
}

.switch input:checked + .switch-slider {
  background-color: var(--color-primary-600);
}

.switch input:checked + .switch-slider:before {
  transform: translateX(24px);
}

.switch input:focus + .switch-slider {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ========== FORM LAYOUTS ========== */

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

.form-inline .form-group {
  margin-bottom: 0;
  flex: 1;
}

@media (max-width: 640px) {
  .form-inline {
    flex-direction: column;
    align-items: stretch;
  }
  
  .form-inline .form-group {
    width: 100%;
  }
}

.form-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 640px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

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

.was-validated .form-control:valid,
.form-control.is-valid {
  border-color: var(--color-success);
}

.was-validated .form-control:valid:focus,
.form-control.is-valid:focus {
  border-color: var(--color-success);
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.1);
}

.was-validated .form-control:invalid,
.form-control.is-invalid {
  border-color: var(--color-error);
}

.was-validated .form-control:invalid:focus,
.form-control.is-invalid:focus {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.valid-feedback {
  display: none;
  margin-top: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-success);
}

.invalid-feedback {
  display: none;
  margin-top: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-error);
}

.was-validated .form-control:valid ~ .valid-feedback,
.form-control.is-valid ~ .valid-feedback {
  display: block;
}

.was-validated .form-control:invalid ~ .invalid-feedback,
.form-control.is-invalid ~ .invalid-feedback {
  display: block;
}

/* ========== LEGACY BOOTSTRAP COMPATIBILITY ========== */

.form-control-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
}

.form-control-lg {
  padding: var(--space-4) var(--space-5);
  font-size: var(--font-size-lg);
}

.control-label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: var(--font-weight-medium);
}