/* ==========================================================
   FORMS
   BEM · .form · fields · inputs · validation · helpers
   ========================================================== */

.form {
    width: 100%;
}

.form__fieldset {
    border: none;
    margin: 0;
    padding: 0;
    min-width: 0;
}

.form__legend {
    display: block;
    width: 100%;
    margin-bottom: var(--space-5);
    padding: 0;
    font-family: var(--font-heading);
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-semibold);
    color: var(--color-heading);
}

.form__row {
    display: grid;
    gap: var(--field-gap);
    grid-template-columns: 1fr;
    margin-bottom: var(--field-gap);
}

.form__row:last-child {
    margin-bottom: 0;
}

.form__field {
    display: flex;
    flex-direction: column;
    gap: var(--label-gap);
    min-width: 0;
}

.form__field--full {
    grid-column: 1 / -1;
}

/* ---------- Label ---------- */

.form__label {
    display: block;
    font-family: var(--font-heading);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-snug);
    color: var(--color-heading);
}

.form__label-optional {
    font-weight: var(--font-weight-normal);
    color: var(--color-text-muted);
}

.form__label-required::after {
    content: " *";
    color: var(--color-danger);
    font-weight: var(--font-weight-normal);
}

/* ---------- Controls ---------- */

.form__input,
.form__select,
.form__textarea {
    display: block;
    width: 100%;
    min-height: var(--input-height);
    padding: var(--input-padding-y) var(--input-padding-x);

    font-family: var(--font-body);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-snug);
    color: var(--color-text);

    background-color: var(--input-bg);
    border: var(--border-width) solid var(--input-border);
    border-radius: var(--input-radius);
    box-shadow: var(--shadow-xs);

    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        background-color var(--transition-fast);
}

.form__input::placeholder,
.form__textarea::placeholder {
    color: var(--input-placeholder);
    opacity: 1;
}

.form__input:hover:not(:disabled):not([readonly]),
.form__select:hover:not(:disabled),
.form__textarea:hover:not(:disabled):not([readonly]) {
    border-color: var(--input-border-hover);
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--input-border-focus);
    box-shadow: var(--focus-ring);
}

.form__input:disabled,
.form__select:disabled,
.form__textarea:disabled {
    background-color: var(--input-bg-disabled);
    color: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 1;
}

.form__input[readonly],
.form__textarea[readonly] {
    background-color: var(--color-off-white);
    cursor: default;
}

.form__textarea {
    min-height: 9rem;
    padding-top: var(--space-4);
    resize: vertical;
}

.form__select {
    appearance: none;
    padding-right: 2.75rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6l4 4 4-4' stroke='%23667587' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
    cursor: pointer;
}

/* ---------- Input with icon / addon ---------- */

.form__control {
    position: relative;
    display: flex;
    align-items: stretch;
    width: 100%;
}

.form__control .form__input {
    flex: 1 1 auto;
}

.form__control--icon-start .form__input {
    padding-left: 2.75rem;
}

.form__control--icon-end .form__input {
    padding-right: 2.75rem;
}

.form__control-icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
    color: var(--color-text-muted);
    pointer-events: none;
}

.form__control--icon-start .form__control-icon {
    left: 1rem;
}

.form__control--icon-end .form__control-icon {
    right: 1rem;
}

.form__control-icon svg {
    width: 100%;
    height: 100%;
}

/* ---------- Checkbox & Radio ---------- */

.form__check {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    min-height: 1.5rem;
}

.form__check-input {
    flex-shrink: 0;
    width: 1.25rem;
    height: 1.25rem;
    margin-top: 0.15rem;
    accent-color: var(--color-accent);
    cursor: pointer;
}

.form__check-input:focus-visible {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
}

.form__check-label {
    font-size: var(--font-size-md);
    line-height: var(--line-height-snug);
    color: var(--color-text);
    cursor: pointer;
}

.form__check-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.form__check-group--inline {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-5);
}

/* ---------- Helper / Error / Success ---------- */

.form__hint {
    margin: 0;
    font-size: var(--font-size-sm);
    line-height: var(--line-height-snug);
    color: var(--color-text-muted);
}

.form__error {
    margin: 0;
    font-size: var(--font-size-sm);
    line-height: var(--line-height-snug);
    font-weight: var(--font-weight-medium);
    color: var(--color-danger);
}

.form__success {
    margin: 0;
    font-size: var(--font-size-sm);
    line-height: var(--line-height-snug);
    font-weight: var(--font-weight-medium);
    color: var(--color-success);
}

/* Validation states */

.form__field--error .form__input,
.form__field--error .form__select,
.form__field--error .form__textarea,
.form__input.is-invalid,
.form__select.is-invalid,
.form__textarea.is-invalid {
    border-color: var(--color-danger);
}

.form__field--error .form__input:focus,
.form__field--error .form__select:focus,
.form__field--error .form__textarea:focus,
.form__input.is-invalid:focus,
.form__select.is-invalid:focus,
.form__textarea.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(194, 59, 55, 0.25);
}

.form__field--success .form__input,
.form__field--success .form__select,
.form__field--success .form__textarea,
.form__input.is-valid,
.form__select.is-valid,
.form__textarea.is-valid {
    border-color: var(--color-success);
}

/* ---------- Actions ---------- */

.form__actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.form__actions--end {
    justify-content: flex-end;
}

.form__actions--center {
    justify-content: center;
}

.form__actions--stretch > .btn {
    flex: 1 1 auto;
}

/* ---------- Alert / Status Banner ---------- */

.form__alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-md);
    border: var(--border-width) solid transparent;
    font-size: var(--font-size-sm);
    line-height: var(--line-height-snug);
}

.form__alert--error {
    color: var(--color-danger);
    background-color: var(--color-danger-soft);
    border-color: rgba(194, 59, 55, 0.2);
}

.form__alert--success {
    color: var(--color-success);
    background-color: var(--color-success-soft);
    border-color: rgba(47, 143, 91, 0.2);
}

.form__alert--warning {
    color: var(--color-warning);
    background-color: var(--color-warning-soft);
    border-color: rgba(201, 138, 18, 0.25);
}