/* ═══════════════════════════════════════════════════════════
   TIANX STUDIO — Forms
   ═══════════════════════════════════════════════════════════ */

.form {
  max-width: 560px;
}

.form--wide {
  max-width: 680px;
}

.form--centered {
  margin: 0 auto;
}

/* ─── FORM GROUP ───────────────────────────────────────── */

.form__group {
  margin-bottom: var(--space-sm);
}

.form__label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xs);
}

/* ─── INPUTS ───────────────────────────────────────────── */

.form__input,
.form__textarea,
.form__select {
  width: 100%;
  padding: 14px 18px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--duration-sm) var(--ease);
  outline: none;
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  border-color: var(--signal);
  box-shadow: 0 0 0 3px var(--signal-pale);
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--text-muted);
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
}

.form__select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5L6 7.5L9 4.5' stroke='%238B91A0' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

/* ─── RADIO CARDS ──────────────────────────────────────── */

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

.form__radio-card {
  position: relative;
}

.form__radio-card input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.form__radio-card label {
  display: block;
  padding: 14px 18px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-sm) var(--ease);
  text-align: center;
}

.form__radio-card input:checked + label {
  border-color: var(--signal);
  background: var(--signal-pale);
  color: var(--signal-dark);
}

.form__radio-card label:hover {
  border-color: var(--border-strong);
}

/* ─── CHECKBOX ─────────────────────────────────────────── */

.form__checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--space-xs);
  cursor: pointer;
}

.form__checkbox input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--signal);
  flex-shrink: 0;
}

.form__checkbox-text {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.form__checkbox-text a {
  color: var(--signal);
  text-decoration: underline;
}

/* ─── ERROR STATE ──────────────────────────────────────── */

.form__input.error,
.form__textarea.error,
.form__select.error {
  border-color: #e53e3e;
  box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.08);
}

.form__error {
  display: none;
  font-size: 0.75rem;
  color: #e53e3e;
  margin-top: 4px;
}

.form__input.error ~ .form__error,
.form__textarea.error ~ .form__error,
.form__select.error ~ .form__error {
  display: block;
}

/* ─── SUBMIT ───────────────────────────────────────────── */

.form__submit {
  margin-top: var(--space-md);
}

/* ─── SUCCESS STATE ────────────────────────────────────── */

.form__success {
  display: none;
  text-align: center;
  padding: var(--space-lg) var(--space-md);
}

.form__success.show {
  display: block;
}

.form__success-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-sm);
  border-radius: 50%;
  background: rgba(34, 197, 94, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #16a34a;
}

/* ─── DARK VARIANT ─────────────────────────────────────── */

.section--dark .form__input,
.section--dark .form__textarea,
.section--dark .form__select {
  background: rgba(255,255,255,0.05);
  border-color: var(--border-light);
  color: var(--text-inverse);
}

.section--dark .form__input:focus,
.section--dark .form__textarea:focus,
.section--dark .form__select:focus {
  border-color: var(--signal);
  box-shadow: 0 0 0 3px var(--signal-glow);
}

.section--dark .form__label {
  color: rgba(255,255,255,0.5);
}

.section--dark .form__input::placeholder,
.section--dark .form__textarea::placeholder {
  color: rgba(255,255,255,0.25);
}