/*
form.css
 */

/* =========================================================
   Ajus Form System
   Purpose: Exclusive form-only utility and component classes
   Prefix: ajus-
   ========================================================= */

/* =========================
   Form Layout
   ========================= */
.ajus-form {
    display: block;
    width: 100%;
}

.ajus-form-stack {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.ajus-form-row {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 1rem;
}

.ajus-form-col-12 {
    grid-column: span 12;
}

.ajus-form-col-6 {
    grid-column: span 6;
}

.ajus-form-col-4 {
    grid-column: span 4;
}

.ajus-form-col-3 {
    grid-column: span 3;
}

.ajus-form-inline {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    gap: 1rem;
}

.ajus-form-inline > .ajus-field {
    flex: 1 1 220px;
}

/* =========================
   Field Structure
   ========================= */
.ajus-field {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    min-width: 0;
}

.ajus-field--grow,
.ajus-input--grow,
.ajus-select--grow,
.ajus-textarea--grow {
    width: 100%;
}

.ajus-fieldset {
    margin: 0;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg-surface);
}

.ajus-legend {
    padding: 0 0.35rem;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text-main);
}

/* =========================
   Form Typography
   ========================= */
.ajus-label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin: 0;
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-text-main);
}

.ajus-label--required::after {
    content: "*";
    color: var(--color-text-accent);
    font-weight: 700;
}

.ajus-label-note {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.ajus-help {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--color-text-muted);
}

.ajus-warning {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--color-warning);
}

.ajus-error {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--color-danger);
}

.ajus-success {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--color-success);
}

.ajus-counter {
    margin: 0;
    font-size: 0.8rem;
    line-height: 1.4;
    text-align: right;
    color: var(--color-text-soft);
}

/* =========================
   Core Controls
   ========================= */
.ajus-input,
.ajus-select,
.ajus-textarea {
    width: 100%;
    min-height: 2.9rem;
    padding: 0.75rem 0.95rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-surface);
    color: var(--color-text-main);
    font-size: 0.95rem;
    line-height: 1.45;
    box-sizing: border-box;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.ajus-input::placeholder,
.ajus-textarea::placeholder {
    color: var(--color-text-soft);
    opacity: 1;
}

.ajus-input:hover,
.ajus-select:hover,
.ajus-textarea:hover {
    border-color: var(--color-border-strong);
}

.ajus-input:focus,
.ajus-select:focus,
.ajus-textarea:focus {
    border-color: var(--color-border-primary);
    box-shadow: 0 0 0 0.25rem var(--color-focus-ring);
    background: var(--color-bg-surface);
}

.ajus-input:disabled,
.ajus-select:disabled,
.ajus-textarea:disabled,
.ajus-input[readonly],
.ajus-textarea[readonly] {
    background: var(--color-bg-disabled);
    color: var(--color-text-disabled);
    border-color: var(--color-border-soft);
    cursor: not-allowed;
}

.ajus-textarea {
    min-height: 7rem;
    resize: vertical;
}

.ajus-select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    padding-right: 2.75rem;
    background-image: linear-gradient(45deg, transparent 50%, var(--color-text-muted) 50%),
                      linear-gradient(135deg, var(--color-text-muted) 50%, transparent 50%);
    background-position: calc(100% - 1.15rem) calc(50% - 0.15rem), calc(100% - 0.8rem) calc(50% - 0.15rem);
    background-size: 0.4rem 0.4rem, 0.4rem 0.4rem;
    background-repeat: no-repeat;
}

/* =========================
   Control Sizes
   ========================= */
.ajus-input--sm,
.ajus-select--sm,
.ajus-textarea--sm {
    min-height: 2.35rem;
    padding: 0.55rem 0.8rem;
    font-size: 0.88rem;
    border-radius: 0.65rem;
}

.ajus-input--lg,
.ajus-select--lg,
.ajus-textarea--lg {
    min-height: 3.35rem;
    padding: 0.95rem 1.1rem;
    font-size: 1rem;
    border-radius: 0.95rem;
}

/* =========================
   Control Styles
   ========================= */
.ajus-input--soft,
.ajus-select--soft,
.ajus-textarea--soft {
    background: var(--color-bg-surface-soft);
    border-color: var(--color-border-soft);
}

.ajus-input--muted,
.ajus-select--muted,
.ajus-textarea--muted {
    background: var(--color-bg-surface-muted);
    border-color: var(--color-border-soft);
}

.ajus-input--pill,
.ajus-select--pill {
    border-radius: var(--radius-pill);
}

.ajus-textarea--fixed {
    resize: none;
}

/* =========================
   Validation States
   ========================= */
.ajus-input--success,
.ajus-select--success,
.ajus-textarea--success {
    border-color: var(--color-success);
    background: var(--color-success-soft);
}

.ajus-input--warning,
.ajus-select--warning,
.ajus-textarea--warning {
    border-color: var(--color-warning);
    background: var(--color-warning-soft);
}

.ajus-input--error,
.ajus-select--error,
.ajus-textarea--error {
    border-color: var(--color-danger);
    background: var(--color-danger-soft);
}

.ajus-input--success:focus,
.ajus-select--success:focus,
.ajus-textarea--success:focus {
    box-shadow: 0 0 0 0.25rem color-mix(in srgb, var(--color-success) 18%, transparent);
}

.ajus-input--warning:focus,
.ajus-select--warning:focus,
.ajus-textarea--warning:focus {
    box-shadow: 0 0 0 0.25rem color-mix(in srgb, var(--color-warning) 18%, transparent);
}

.ajus-input--error:focus,
.ajus-select--error:focus,
.ajus-textarea--error:focus {
    box-shadow: 0 0 0 0.25rem color-mix(in srgb, var(--color-danger) 18%, transparent);
}

/* =========================
   Input Group / Inside Elements
   ========================= */
.ajus-input-wrap {
    position: relative;
    width: 100%;
}

.ajus-input-prefix,
.ajus-input-suffix {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 0.92rem;
    line-height: 1;
    pointer-events: none;
}

.ajus-input-prefix {
    left: 0.9rem;
}

.ajus-input-suffix {
    right: 0.9rem;
}

.ajus-input--with-prefix {
    padding-left: 2.5rem;
}

.ajus-input--with-suffix {
    padding-right: 2.5rem;
}

.ajus-input-action {
    position: absolute;
    top: 50%;
    right: 0.45rem;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.ajus-input--with-action {
    padding-right: 3.6rem;
}

.ajus-input-action--start {
    left: 0.45rem;
    right: auto;
}

.ajus-input--with-action-start {
    padding-left: 3.6rem;
}

/* =========================
   Choice Controls
   ========================= */
.ajus-check,
.ajus-radio {
    display: inline-flex;
    align-items: flex-start;
    gap: 0.65rem;
    cursor: pointer;
    color: var(--color-text-main);
    line-height: 1.45;
}

.ajus-check-input,
.ajus-radio-input {
    width: 1.05rem;
    height: 1.05rem;
    margin-top: 0.15rem;
    accent-color: var(--color-primary);
    flex: 0 0 auto;
}

.ajus-check-label,
.ajus-radio-label {
    font-size: 0.95rem;
    color: var(--color-text-main);
}

.ajus-choice-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.ajus-choice-list--inline {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem 1.5rem;
}

/* =========================
   File Input Support
   ========================= */
.ajus-file {
    display: block;
    width: 100%;
    padding: 0.7rem 0.85rem;
    border: 1px dashed var(--color-border-strong);
    border-radius: var(--radius-md);
    background: var(--color-bg-surface-soft);
    color: var(--color-text-main);
    font-size: 0.95rem;
    box-sizing: border-box;
}

.ajus-file:hover {
    border-color: var(--color-border-primary);
    background: var(--color-bg-primary-soft);
}

.ajus-file:focus {
    outline: none;
    box-shadow: 0 0 0 0.25rem var(--color-focus-ring);
}

/* =========================
   Readonly / Plain Display
   ========================= */
.ajus-input-plain {
    min-height: 2.9rem;
    padding: 0.75rem 0;
    color: var(--color-text-main);
    font-size: 0.95rem;
    line-height: 1.45;
    border-bottom: 1px solid var(--color-border);
}

/* =========================
   Responsive
   ========================= */
@media (max-width: 900px) {
    .ajus-form-col-6,
    .ajus-form-col-4,
    .ajus-form-col-3 {
        grid-column: span 12;
    }
}

@media (max-width: 640px) {
    .ajus-form-row {
        gap: 0.85rem;
    }

    .ajus-fieldset {
        padding: 0.85rem;
    }

    .ajus-input,
    .ajus-select,
    .ajus-textarea {
        font-size: 0.92rem;
    }

    .ajus-form-inline {
        flex-direction: column;
        align-items: stretch;
    }

    .ajus-form-inline > .ajus-field {
        flex-basis: auto;
    }
}