/**
 * NumeraIQ Form Styles
 */

/* ============================================
   Input Fields
   ============================================ */

.form-input {
  width: 100%;
  padding: 1rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: hsl(var(--color-dark));
  background-color: hsl(var(--color-cream));
  border: 1px solid hsl(var(--color-border));
  border-radius: 0;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

.form-input::placeholder {
  color: hsl(var(--color-text-muted));
}

.form-input:focus {
  outline: none;
  border-color: hsl(var(--color-lime));
  box-shadow: 0 0 0 3px hsl(var(--color-lime) / 0.2);
}

.form-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Input on dark backgrounds */
.section-dark .form-input,
.form-input-dark {
  color: hsl(var(--color-text-light));
  background-color: hsl(var(--color-dark-elevated));
  border-color: hsl(var(--color-text-light) / 0.2);
}

.section-dark .form-input::placeholder,
.form-input-dark::placeholder {
  color: hsl(var(--color-text-light) / 0.5);
}

/* ============================================
   Form Groups
   ============================================ */

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: hsl(var(--color-text-muted));
}

.section-dark .form-label {
  color: hsl(var(--color-text-light) / 0.6);
}

.form-error {
  font-size: 0.875rem;
  color: hsl(var(--color-data-red));
}

.form-help {
  font-size: 0.875rem;
  color: hsl(var(--color-text-muted));
}

/* ============================================
   Inline Form (Email Subscription)
   ============================================ */

.form-inline {
  display: flex;
  gap: 0;
}

.form-inline .form-input {
  flex: 1;
  border-right: none;
}

.form-inline .btn,
.form-inline .btn-lime {
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .form-inline {
    flex-direction: column;
    gap: 1rem;
  }

  .form-inline .form-input {
    border-right: 1px solid hsl(var(--color-border));
  }

  .form-inline .btn,
  .form-inline .btn-lime {
    width: 100%;
  }
}

/* ============================================
   Range Slider
   ============================================ */

.form-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: hsl(var(--color-cream-dark));
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.form-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  background: hsl(var(--color-lime));
  border: 3px solid hsl(var(--color-dark));
  border-radius: 50%;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.form-range::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.form-range::-moz-range-thumb {
  width: 24px;
  height: 24px;
  background: hsl(var(--color-lime));
  border: 3px solid hsl(var(--color-dark));
  border-radius: 50%;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.form-range::-moz-range-thumb:hover {
  transform: scale(1.1);
}

/* Range slider track fill */
.form-range-container {
  position: relative;
}

.form-range-fill {
  position: absolute;
  top: 50%;
  left: 0;
  height: 4px;
  background: hsl(var(--color-lime));
  border-radius: 2px;
  transform: translateY(-50%);
  pointer-events: none;
}

/* ============================================
   Checkbox & Radio
   ============================================ */

.form-checkbox,
.form-radio {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
}

.form-checkbox input,
.form-radio input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.form-checkbox-mark,
.form-radio-mark {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 2px solid hsl(var(--color-dark));
  background: transparent;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.form-radio-mark {
  border-radius: 50%;
}

.form-checkbox input:checked + .form-checkbox-mark,
.form-radio input:checked + .form-radio-mark {
  background: hsl(var(--color-lime));
  border-color: hsl(var(--color-lime));
}

.form-checkbox-mark svg,
.form-radio-mark::after {
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.form-checkbox input:checked + .form-checkbox-mark svg {
  opacity: 1;
  color: hsl(var(--color-dark));
}

.form-radio-mark::after {
  content: '';
  width: 8px;
  height: 8px;
  background: hsl(var(--color-dark));
  border-radius: 50%;
}

.form-radio input:checked + .form-radio-mark::after {
  opacity: 1;
}

.form-checkbox-label,
.form-radio-label {
  font-size: 0.875rem;
  line-height: 1.5;
}

/* Dark background versions */
.section-dark .form-checkbox-mark,
.section-dark .form-radio-mark {
  border-color: hsl(var(--color-text-light));
}

/* ============================================
   Form Validation States
   ============================================ */

.form-input.is-invalid {
  border-color: hsl(var(--color-data-red));
}

.form-input.is-invalid:focus {
  box-shadow: 0 0 0 3px hsl(var(--color-data-red) / 0.2);
}

.form-input.is-valid {
  border-color: hsl(var(--color-data-green));
}

/* ============================================
   Form Loading State
   ============================================ */

.form-loading {
  position: relative;
  pointer-events: none;
}

.form-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid hsl(var(--color-dark) / 0.2);
  border-top-color: hsl(var(--color-lime));
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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