/**
 * @file
 * Form styling for NBVT Base theme
 * Modern form components with accessibility and calculator-specific styling
 */

/* Form wrapper */
.nbvt-form-wrapper {
  margin-bottom: 2rem;
}

.nbvt-form {
  background: var(--color-form-bg);
  border-radius: 8px;
  padding: 1.5rem;
}

/* Form elements base styling */
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="datetime-local"],
input[type="month"],
input[type="time"],
input[type="week"],
textarea,
select {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: var(--font-size-base);
  font-family: var(--font-family-sans);
  line-height: var(--line-height-normal);
  color: var(--color-form-text);
  background-color: var(--color-form-bg);
  border: 1px solid var(--color-form-border);
  border-radius: 6px;
  transition: border-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

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="search"]:focus,
input[type="date"]:focus,
input[type="datetime-local"]:focus,
input[type="month"]:focus,
input[type="time"]:focus,
input[type="week"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-form-border-focus);
  box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

/* Placeholder styling */
input::placeholder,
textarea::placeholder {
  color: var(--color-form-placeholder);
  opacity: 1;
}

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

/* Invalid state */
input:invalid,
textarea:invalid,
select:invalid {
  border-color: var(--color-error);
}

input:invalid:focus,
textarea:invalid:focus,
select:invalid:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

/* Textarea specific */
textarea {
  resize: vertical;
  min-height: 120px;
}

/* Select specific */
select {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: 2.5rem;
  appearance: none;
}

/* Checkboxes and radio buttons */
input[type="checkbox"],
input[type="radio"] {
  width: 1.25rem;
  height: 1.25rem;
  margin-right: 0.5rem;
  accent-color: var(--color-primary);
}

/* Form groups */
.form-item {
  margin-bottom: 1.5rem;
}

.form-item:last-child {
  margin-bottom: 0;
}

/* Labels */
label {
  display: block;
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  margin-bottom: 0.5rem;
  font-size: var(--font-size-sm);
}

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

/* Help text */
.form-item-description,
.help-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: 0.25rem;
  line-height: var(--line-height-normal);
}

/* Error messages */
.form-item-error-message,
.error-message {
  font-size: var(--font-size-sm);
  color: var(--color-error);
  margin-top: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.form-item-error-message::before,
.error-message::before {
  content: "⚠";
  font-weight: var(--font-weight-bold);
}

/* Fieldsets */
fieldset {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

legend {
  font-weight: var(--font-weight-semibold);
  color: var(--color-heading);
  padding: 0 0.5rem;
  font-size: var(--font-size-lg);
}

/* Button styling */
.button,
button,
input[type="submit"],
input[type="button"],
input[type="reset"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-none);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  min-height: 2.75rem;
}

/* Primary button */
.button--primary,
input[type="submit"] {
  background-color: var(--color-button-primary-bg);
  color: var(--color-button-primary-text);
  border-color: var(--color-button-primary-bg);
}

.button--primary:visited,
a.button--primary:visited {
  color: var(--color-button-primary-text) !important;
}

.button--primary:hover,
input[type="submit"]:hover {
  background-color: var(--color-button-primary-hover);
  border-color: var(--color-button-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px var(--color-shadow);
}

.button--primary:active,
a.button--primary:active,
input[type="submit"]:active {
  background-color: var(--color-button-primary-hover);
  border-color: var(--color-button-primary-hover);
  color: var(--color-button-primary-text) !important;
  transform: translateY(0);
  box-shadow: 0 2px 4px var(--color-shadow);
}

/* Secondary button */
.button--secondary,
input[type="button"],
input[type="reset"] {
  background-color: var(--color-button-secondary-bg);
  color: var(--color-button-secondary-text);
  border-color: var(--color-button-secondary-bg);
}

.button--secondary:visited,
a.button--secondary:visited {
  color: var(--color-button-secondary-text) !important;
}

.button--secondary:hover,
input[type="button"]:hover,
input[type="reset"]:hover {
  background-color: var(--color-button-secondary-hover);
  border-color: var(--color-button-secondary-hover);
}

.button--secondary:active,
a.button--secondary:active,
input[type="button"]:active,
input[type="reset"]:active {
  background-color: var(--color-button-secondary-hover);
  border-color: var(--color-button-secondary-hover);
  color: var(--color-button-secondary-text) !important;
  transform: translateY(0);
}

/* Success button */
.button--success {
  background-color: var(--color-button-success-bg);
  color: var(--color-button-success-text);
  border-color: var(--color-button-success-bg);
}

.button--success:visited,
a.button--success:visited {
  color: var(--color-button-success-text) !important;
}

.button--success:hover {
  background-color: var(--color-button-success-hover);
  border-color: var(--color-button-success-hover);
}

.button--success:active,
a.button--success:active {
  background-color: var(--color-button-success-hover);
  border-color: var(--color-button-success-hover);
  color: var(--color-button-success-text) !important;
  transform: translateY(0);
}

/* Warning button */
.button--warning {
  background-color: var(--color-button-warning-bg);
  color: var(--color-button-warning-text);
  border-color: var(--color-button-warning-bg);
}

.button--warning:visited,
a.button--warning:visited {
  color: var(--color-button-warning-text) !important;
}

.button--warning:hover {
  background-color: var(--color-button-warning-hover);
  border-color: var(--color-button-warning-hover);
}

.button--warning:active,
a.button--warning:active {
  background-color: var(--color-button-warning-hover);
  border-color: var(--color-button-warning-hover);
  color: var(--color-button-warning-text) !important;
  transform: translateY(0);
}

/* Error/danger button */
.button--danger {
  background-color: var(--color-button-error-bg);
  color: var(--color-button-error-text);
  border-color: var(--color-button-error-bg);
}

.button--danger:visited,
a.button--danger:visited {
  color: var(--color-button-error-text) !important;
}

.button--danger:hover {
  background-color: var(--color-button-error-hover);
  border-color: var(--color-button-error-hover);
}

.button--danger:active,
a.button--danger:active {
  background-color: var(--color-button-error-hover);
  border-color: var(--color-button-error-hover);
  color: var(--color-button-error-text) !important;
  transform: translateY(0);
}

/* Button sizes */
.button--small {
  padding: 0.5rem 1rem;
  font-size: var(--font-size-sm);
  min-height: 2.25rem;
}

.button--large {
  padding: 1rem 2rem;
  font-size: var(--font-size-lg);
  min-height: 3.25rem;
}

/* Button states */
.button:disabled,
button:disabled,
input[type="submit"]:disabled,
input[type="button"]:disabled,
input[type="reset"]:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.button:focus,
button:focus,
input[type="submit"]:focus,
input[type="button"]:focus,
input[type="reset"]:focus {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* Form actions */
.form-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.form-actions .button {
  flex: 0 0 auto;
}

@media (max-width: 767px) {
  .form-actions {
    flex-direction: column;
  }
  
  .form-actions .button {
    width: 100%;
  }
}

/* Calculator-specific form styling */
.nbvt-calculator-form {
  background: var(--color-calculator-bg);
  border: 1px solid var(--color-calculator-border);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 6px var(--color-shadow-light);
}

.nbvt-calculator-form .form-item {
  margin-bottom: -0.1rem;
}

.nbvt-calculator-form label {
  font-weight: var(--font-weight-semibold);
  color: var(--color-heading);
  margin-bottom: 0.75rem;
}

/* Multi-step form styling */
.form-step-indicator {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2rem;
  padding: 1rem;
  background: var(--color-bg-alt);
  border-radius: 8px;
}

.form-step {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.form-step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--color-calculator-step-inactive);
  color: var(--color-white);
  font-weight: var(--font-weight-bold);
}

.form-step.active .form-step-number {
  background: var(--color-calculator-step-active);
}

.form-step.completed .form-step-number {
  background: var(--color-calculator-step-completed);
}

.form-step.completed .form-step-number::before {
  content: "✓";
}

/* File upload styling */
input[type="file"] {
  padding: 0.5rem;
  border: 2px dashed var(--color-border);
  border-radius: 8px;
  background: var(--color-bg-alt);
  cursor: pointer;
}

input[type="file"]:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-muted);
}

/* Range slider styling */
input[type="range"] {
  width: 100%;
  height: 0.5rem;
  border-radius: 0.25rem;
  background: var(--color-bg-muted);
  outline: none;
  appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: none;
}

/* Form validation styling */
.form-item.has-error input,
.form-item.has-error textarea,
.form-item.has-error select {
  border-color: var(--color-error);
}

.form-item.has-success input,
.form-item.has-success textarea,
.form-item.has-success select {
  border-color: var(--color-success);
}

/* Loading state */
.form-loading {
  position: relative;
  pointer-events: none;
  opacity: 0.7;
}

.form-loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 2rem;
  height: 2rem;
  margin: -1rem 0 0 -1rem;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}