/* =============================================================================
   RADIO GROUP COMPONENT
   Brand: Deep Trust Blue text, Calm Teal active states
   ============================================================================= */

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 0;
    border: none;
    padding: 0;
    margin: 0;
}

.radio-group--disabled {
    opacity: 0.5;
}

.radio-group__legend {
    font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-trust-blue);
    margin-bottom: 10px;
    padding: 0;
    line-height: 1.4;
}

.form-field__required {
    color: var(--color-error);
    font-weight: 700;
    margin-left: 2px;
}

.radio-group__items {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.radio-group__items--horizontal {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 16px 24px;
}

.radio__item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    position: relative;
    cursor: pointer;
    min-height: 24px;
}

.radio__item--disabled {
    cursor: not-allowed;
    opacity: 0.55;
}

.radio__input {
    position: absolute;
    opacity: 0;
    width: 24px;
    height: 24px;
    margin: 0;
    cursor: pointer;
    z-index: 1;
}

.radio__input:disabled {
    cursor: not-allowed;
}

.radio__indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    margin-top: 2px;
    background-color: var(--color-white);
    border: 2px solid var(--color-soft-grey);
    border-radius: 50%;
    
    /* Motion binding from Phase 2 Checklist */
    transition: background-color var(--motion-fast), border-color var(--motion-fast), box-shadow var(--motion-fast);
    pointer-events: none;
}

.radio__item:hover:not(.radio__item--disabled) .radio__indicator {
    border-color: var(--color-calm-teal); /* Preview state */
}

/* Checked — Calm Teal border + Calm Teal fill */
.radio__indicator--checked {
    background-color: var(--color-calm-teal);
    border-color: var(--color-calm-teal);
}

.radio__input:focus-visible ~ .radio__indicator {
    outline: var(--focus-outline);
    outline-offset: 2px;
}

/* Inner white dot */
.radio__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-white);
    pointer-events: none;
    flex-shrink: 0;
    
    /* Animation implementation */
    opacity: 0;
    transform: scale(0.5);
    transition: opacity var(--motion-fast), transform var(--motion-fast);
}

.radio__indicator--checked .radio__dot {
    opacity: 1;
    transform: scale(1);
}

.radio__label {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    font-weight: 400;
    color: var(--color-charcoal);
    line-height: 1.5;
    cursor: pointer;
    flex: 1;
}

.radio__item--disabled .radio__label {
    cursor: not-allowed;
    color: var(--color-soft-grey);
}

.radio__item--selected .radio__label {
    color: var(--color-trust-blue);
    font-weight: 500;
}

.radio__sublabel {
    font-size: 12px;
    font-weight: 400;
    color: var(--color-soft-grey);
    line-height: 1.4;
}

.radio__item--selected .radio__sublabel {
    color: var(--color-soft-grey);
}

/* Error modifier */
.radio-group--error .radio__indicator {
    border-color: var(--color-error);
}

.radio-group--error .radio__item:hover:not(.radio__item--disabled) .radio__indicator {
    border-color: var(--color-error);
}

.radio-group .message--inline {
    margin-top: 8px;
}