/* ==========================================================================
   VLab-4000 — Forms
   ========================================================================== */

/* =========================================================================
   FORM WRAPPER
   ========================================================================= */

.form {
    display: flex;
    flex-direction: column;
    gap: var(--space-24);
}

.form--compact {
    gap: var(--space-16);
}

/* =========================================================================
   FORM GROUP
   ========================================================================= */

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.form-row {
    display: grid;
    gap: var(--space-16);
    grid-template-columns: 1fr;
}

@media (min-width: 576px) {
    .form-row { grid-template-columns: 1fr 1fr; }
    .form-row--3 { grid-template-columns: 1fr 1fr 1fr; }
}

/* =========================================================================
   LABELS
   ========================================================================= */

label,
.form-label {
    font-family: var(--font-body);
    font-size: var(--text-small);
    font-weight: var(--weight-semibold);
    color: var(--color-primary);
    display: block;
    cursor: pointer;
    line-height: 1.3;
}

.form-label--required::after {
    content: ' *';
    color: var(--color-accent);
    font-weight: var(--weight-regular);
}

.form-label__hint {
    display: block;
    font-size: var(--text-micro);
    font-weight: var(--weight-regular);
    color: var(--ink-300);
    margin-top: var(--space-2);
}

/* =========================================================================
   TEXT INPUTS & TEXTAREA
   ========================================================================= */

.form-control,
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="password"],
input[type="url"],
input[type="search"],
input[type="date"],
input[type="time"],
textarea {
    display: block;
    width: 100%;
    min-height: 44px; /* WCAG touch target */
    padding: var(--space-12) var(--space-16);
    font-family: var(--font-body);
    font-size: var(--text-body);
    font-weight: var(--weight-regular);
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    line-height: var(--leading-normal);
    appearance: none;
    -webkit-appearance: none;
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        background-color var(--transition-fast);
}

.form-control::placeholder,
input::placeholder,
textarea::placeholder {
    color: var(--ink-300);
    font-weight: var(--weight-regular);
}

/* Focus state — Arterial Red ring */
.form-control:focus,
input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="number"]:focus,
input[type="password"]:focus,
input[type="url"]:focus,
input[type="search"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

/* Hover state */
.form-control:hover:not(:focus):not([readonly]):not([disabled]),
input:hover:not(:focus):not([readonly]):not([disabled]),
textarea:hover:not(:focus):not([readonly]):not([disabled]) {
    border-color: var(--ink-300);
}

/* Disabled state */
.form-control[disabled],
input[disabled],
textarea[disabled] {
    background-color: var(--color-bg-alt);
    color: var(--ink-300);
    cursor: not-allowed;
    opacity: 0.7;
}

/* Read-only */
.form-control[readonly],
input[readonly],
textarea[readonly] {
    background-color: var(--color-bg-alt);
    cursor: default;
}

/* Textarea specific */
textarea {
    min-height: 120px;
    resize: vertical;
    line-height: var(--leading-normal);
}

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

/* =========================================================================
   SELECT
   ========================================================================= */

select,
.form-select {
    display: block;
    width: 100%;
    min-height: 44px;
    padding: var(--space-12) var(--space-40) var(--space-12) var(--space-16);
    font-family: var(--font-body);
    font-size: var(--text-body);
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    line-height: var(--leading-normal);
    /* Custom dropdown arrow using SVG */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%232B2D42' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-12) center;
    background-size: 16px;
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

select:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

select:hover:not(:focus):not([disabled]),
.form-select:hover:not(:focus):not([disabled]) {
    border-color: var(--ink-300);
}

select[disabled],
.form-select[disabled] {
    background-color: var(--color-bg-alt);
    color: var(--ink-300);
    cursor: not-allowed;
}

/* =========================================================================
   CHECKBOX & RADIO
   ========================================================================= */

.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--space-12);
    cursor: pointer;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    min-height: unset;
    padding: 0;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-bg);
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    display: grid;
    place-content: center;
    transition:
        border-color var(--transition-fast),
        background-color var(--transition-fast),
        box-shadow var(--transition-fast);
    margin-top: 2px;
}

.form-check input[type="radio"] {
    border-radius: var(--radius-full);
}

/* Checked state */
.form-check input[type="checkbox"]:checked {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='9' viewBox='0 0 12 9' fill='none'%3E%3Cpath d='M1 4L4.5 7.5L11 1' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
}

.form-check input[type="radio"]:checked {
    border-color: var(--color-accent);
    background-image: radial-gradient(circle, var(--color-accent) 45%, transparent 45%);
}

.form-check input[type="checkbox"]:focus-visible,
.form-check input[type="radio"]:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.form-check input[type="checkbox"]:hover:not(:checked),
.form-check input[type="radio"]:hover:not(:checked) {
    border-color: var(--color-accent);
}

.form-check__label {
    font-size: var(--text-body);
    color: var(--color-text);
    line-height: var(--leading-normal);
    cursor: pointer;
}

.form-check__label a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* GDPR consent checkbox */
.form-check--gdpr {
    padding: var(--space-16);
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.form-check--gdpr .form-check__label {
    font-size: var(--text-small);
    color: var(--ink-500);
}

/* =========================================================================
   TOGGLE / SWITCH
   ========================================================================= */

.form-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-12);
    cursor: pointer;
}

.form-toggle__track {
    position: relative;
    width: 44px;
    height: 24px;
    background-color: var(--color-border);
    border-radius: var(--radius-pill);
    transition: background-color var(--transition-fast);
    flex-shrink: 0;
}

.form-toggle__track::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 18px;
    height: 18px;
    border-radius: var(--radius-full);
    background-color: var(--white);
    box-shadow: var(--shadow-card);
    transition: transform var(--transition-fast);
}

.form-toggle input[type="checkbox"]:checked + .form-toggle__track {
    background-color: var(--color-accent);
}

.form-toggle input[type="checkbox"]:checked + .form-toggle__track::after {
    transform: translateX(20px);
}

.form-toggle input[type="checkbox"] {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* =========================================================================
   INPUT GROUPS (icon prefix/suffix)
   ========================================================================= */

.input-group {
    position: relative;
    display: flex;
    align-items: stretch;
}

.input-group .form-control {
    flex: 1;
}

.input-group__prefix,
.input-group__suffix {
    display: flex;
    align-items: center;
    padding: 0 var(--space-12);
    background-color: var(--color-bg-alt);
    border: 1.5px solid var(--color-border);
    color: var(--ink-500);
    font-size: var(--text-body);
    white-space: nowrap;
    pointer-events: none;
}

.input-group__prefix {
    border-right: none;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.input-group__suffix {
    border-left: none;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.input-group .form-control:first-child {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.input-group .form-control:last-child {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.input-group .form-control:not(:first-child):not(:last-child) {
    border-radius: 0;
}

/* Icon inside input */
.input-with-icon {
    position: relative;
}

.input-with-icon__icon {
    position: absolute;
    left: var(--space-12);
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--ink-300);
    pointer-events: none;
}

.input-with-icon .form-control {
    padding-left: calc(var(--space-12) + 18px + var(--space-8));
}

/* =========================================================================
   VALIDATION STATES
   ========================================================================= */

/* Error state */
.form-group--error .form-control,
.form-group--error input,
.form-group--error textarea,
.form-group--error select {
    border-color: var(--color-error);
    background-color: var(--color-error-subtle);
}

.form-group--error .form-control:focus,
.form-group--error input:focus,
.form-group--error textarea:focus {
    box-shadow: 0 0 0 3px var(--color-error-subtle);
}

/* Success state */
.form-group--success .form-control,
.form-group--success input,
.form-group--success textarea,
.form-group--success select {
    border-color: var(--color-success);
}

.form-group--success .form-control:focus,
.form-group--success input:focus {
    box-shadow: 0 0 0 3px var(--color-success-subtle);
}

/* Error messages */
.form-error,
.field-error {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    font-size: var(--text-small);
    font-weight: var(--weight-medium);
    color: var(--color-error);
    margin-top: var(--space-4);
    line-height: var(--leading-snug);
}

/* Hide error labels when empty (no error text yet) */
.form-error:empty,
.field-error:empty {
    display: none;
}

.form-error::before {
    content: '⚠';
    flex-shrink: 0;
    font-size: 0.9em;
}

/* Field hint/help text */
.form-hint {
    font-size: var(--text-small);
    color: var(--ink-300);
    margin-top: var(--space-4);
    line-height: var(--leading-snug);
}

/* =========================================================================
   FORM SUCCESS PANEL
   ========================================================================= */

.form-success {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-16);
    padding: var(--space-48) var(--space-32);
    background-color: var(--color-success-subtle);
    border: 1px solid var(--color-success);
    border-radius: var(--radius-xl);
}

.form-success__icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    background-color: var(--color-success);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}

.form-success__title {
    font-family: var(--font-heading);
    font-size: var(--text-h3);
    font-weight: var(--weight-bold);
    color: var(--color-success);
    margin: 0;
}

.form-success__text {
    font-size: var(--text-body);
    color: var(--ink-500);
    max-width: 50ch;
    margin: 0;
}

/* =========================================================================
   HONEYPOT (anti-spam hidden field)
   ========================================================================= */

.hp-field,
.honeypot,
[data-hp] {
    display: none !important;
    visibility: hidden !important;
    position: absolute !important;
    left: -9999px !important;
    width: 0 !important;
    height: 0 !important;
    overflow: hidden !important;
    pointer-events: none !important;
    aria-hidden: true;
}

/* =========================================================================
   FORM SECTION HEADER
   ========================================================================= */

.form-section-title {
    font-family: var(--font-heading);
    font-size: var(--text-h4);
    font-weight: var(--weight-bold);
    color: var(--color-primary);
    padding-bottom: var(--space-16);
    border-bottom: 2px solid var(--color-accent);
    margin-bottom: var(--space-24);
}

/* =========================================================================
   FORM FOOTER (actions row)
   ========================================================================= */

.form-actions {
    display: flex;
    align-items: center;
    gap: var(--space-16);
    flex-wrap: wrap;
    padding-top: var(--space-8);
}

.form-actions--end {
    justify-content: flex-end;
}

.form-actions--between {
    justify-content: space-between;
}

/* =========================================================================
   FIELDSET LEGEND
   ========================================================================= */

fieldset {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-24);
    margin: 0;
}

legend {
    font-family: var(--font-heading);
    font-size: var(--text-small);
    font-weight: var(--weight-semibold);
    color: var(--color-primary);
    padding: 0 var(--space-8);
}