/**
 * Account v2.0 - Forms
 * @description Стили полей ввода, кнопок, чекбоксов
 * @version 2.0.0
 * @date 2026-02-05
 */

/* ═══════════════════════════════════════════════════════════════
   FORM LAYOUT
   ═══════════════════════════════════════════════════════════════ */

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

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

/* The shared custom-select dropdown anchors with position:absolute /
   top:calc(100% + 6px) and assumes its wrapper is a positioned ancestor
   (filter pages set position:relative on .*-filter-dropdown). The account
   geo wrapper is a plain .form-group, so on desktop the dropdown resolved
   100% against a tall ancestor and slid to the bottom of the viewport
   (looked like the mobile bottom-sheet). Scope the containing block to the
   wrapper. Account-only — does not touch filter pages. (Founder 2026-07-26) */
.form-group[data-custom-select] {
    position: relative;
}

.form-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

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

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

/* ═══════════════════════════════════════════════════════════════
   LABELS
   ═══════════════════════════════════════════════════════════════ */

.form-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
}

.form-label--required::after {
    content: ' *';
    color: var(--color-error);
}

/* ═══════════════════════════════════════════════════════════════
   TEXT INPUT
   ═══════════════════════════════════════════════════════════════ */

.form-input {
    width: 100%;
    height: var(--input-height);
    padding: 0 var(--space-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input:hover:not(:disabled) {
    border-color: var(--border-color-hover);
}

.form-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.15);
}

.form-input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--bg-disabled);
}

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

.form-input--error:focus,
.form-group--error .form-input:focus {
    box-shadow: 0 0 0 3px rgba(244, 67, 54, 0.15);
}

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

.form-input--success:focus,
.form-group--success .form-input:focus {
    box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.15);
}

/* Small input */
.form-input--sm {
    height: var(--input-height-sm);
    font-size: var(--font-size-sm);
    padding: 0 var(--space-sm);
}

/* Input with icon */
.form-input-wrapper {
    position: relative;
}

.form-input-wrapper .form-input {
    padding-left: calc(var(--space-md) + 20px + var(--space-sm));
}

.form-input-wrapper .form-input--icon-right {
    padding-left: var(--space-md);
    padding-right: calc(var(--space-md) + 20px + var(--space-sm));
}

.form-input-icon {
    position: absolute;
    top: 50%;
    left: var(--space-md);
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.form-input-icon--right {
    left: auto;
    right: var(--space-md);
}

/* ═══════════════════════════════════════════════════════════════
   FLOATING LABEL
   ═══════════════════════════════════════════════════════════════ */

.form-floating {
    position: relative;
}

.form-floating .form-input {
    padding-top: var(--space-lg);
    padding-bottom: var(--space-xs);
}

.form-floating .form-label {
    position: absolute;
    top: 50%;
    left: var(--space-md);
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    transition: all var(--transition-fast);
    background: transparent;
    font-weight: var(--font-weight-normal);
}

.form-floating .form-input:focus ~ .form-label,
.form-floating .form-input:not(:placeholder-shown) ~ .form-label {
    top: var(--space-sm);
    transform: translateY(0);
    font-size: var(--font-size-xs);
    color: var(--color-primary);
}

.form-floating .form-input:not(:focus):not(:placeholder-shown) ~ .form-label {
    color: var(--text-muted);
}

/* ═══════════════════════════════════════════════════════════════
   TEXTAREA
   ═══════════════════════════════════════════════════════════════ */

.form-textarea {
    width: 100%;
    min-height: 100px;
    padding: var(--space-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    resize: vertical;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-textarea:hover:not(:disabled) {
    border-color: var(--border-color-hover);
}

.form-textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.15);
}

.form-textarea:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--bg-disabled);
}

.form-textarea--error,
.form-group--error .form-textarea {
    border-color: var(--color-error);
}

.form-textarea--error:focus,
.form-group--error .form-textarea:focus {
    box-shadow: 0 0 0 3px rgba(244, 67, 54, 0.15);
}

/* Auto-resize textarea */
.form-textarea--autosize {
    resize: none;
    overflow: hidden;
}

/* ═══════════════════════════════════════════════════════════════
   SELECT
   ═══════════════════════════════════════════════════════════════ */

.form-select {
    width: 100%;
    height: var(--input-height);
    padding: 0 var(--space-xl) 0 var(--space-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
    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='%239aa0a6' stroke-width='2'%3E%3Cpolyline points='6,9 12,15 18,9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-md) center;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    appearance: none;
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-select:hover:not(:disabled) {
    border-color: var(--border-color-hover);
}

.form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.15);
}

.form-select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background-color: var(--bg-disabled);
}

.form-select--error,
.form-group--error .form-select {
    border-color: var(--color-error);
}

/* Small select */
.form-select--sm {
    height: var(--input-height-sm);
    font-size: var(--font-size-sm);
    padding: 0 var(--space-lg) 0 var(--space-sm);
}

/* Dark theme select arrow */
@media (prefers-color-scheme: dark) {
    .form-select {
        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='%23888888' stroke-width='2'%3E%3Cpolyline points='6,9 12,15 18,9'/%3E%3C/svg%3E");
    }
}

.dark-theme .form-select {
    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='%23888888' stroke-width='2'%3E%3Cpolyline points='6,9 12,15 18,9'/%3E%3C/svg%3E");
}

/* ═══════════════════════════════════════════════════════════════
   CHECKBOX & RADIO
   ═══════════════════════════════════════════════════════════════ */

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

.form-check__input {
    width: 20px;
    height: 20px;
    margin: 0;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.form-check__label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

/* Custom checkbox */
.form-checkbox {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
}

.form-checkbox__input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.form-checkbox__box {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
}

.form-checkbox:hover .form-checkbox__box {
    border-color: var(--border-color-hover);
}

.form-checkbox__input:checked + .form-checkbox__box {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.form-checkbox__input:checked + .form-checkbox__box::after {
    content: '';
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-top: -2px;
}

.form-checkbox__input:focus-visible + .form-checkbox__box {
    box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.15);
}

.form-checkbox__input:disabled + .form-checkbox__box {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-checkbox__label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    user-select: none;
}

/* Custom radio */
.form-radio {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
}

.form-radio__input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.form-radio__circle {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
}

.form-radio:hover .form-radio__circle {
    border-color: var(--border-color-hover);
}

.form-radio__input:checked + .form-radio__circle {
    border-color: var(--color-primary);
}

.form-radio__input:checked + .form-radio__circle::after {
    content: '';
    width: 10px;
    height: 10px;
    background: var(--color-primary);
    border-radius: 50%;
}

.form-radio__input:focus-visible + .form-radio__circle {
    box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.15);
}

.form-radio__label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    user-select: none;
}

/* ═══════════════════════════════════════════════════════════════
   TOGGLE SWITCH
   ═══════════════════════════════════════════════════════════════ */

.form-switch {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
}

.form-switch__input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.form-switch__track {
    width: 44px;
    height: 24px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all var(--transition-fast);
    position: relative;
}

.form-switch__track::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    background: var(--text-muted);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.form-switch__input:checked + .form-switch__track {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.form-switch__input:checked + .form-switch__track::after {
    left: calc(100% - 20px);
    background: white;
}

.form-switch__input:focus-visible + .form-switch__track {
    box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.15);
}

.form-switch__label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    user-select: none;
}

/* ═══════════════════════════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════════════════════════ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    height: var(--button-height);
    padding: 0 var(--space-lg);
    font-family: inherit;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    outline: none;
    white-space: nowrap;
}

.btn:focus-visible {
    box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.3);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Primary */
.btn--primary {
    background: var(--color-primary);
    /* (d) gold fill needs dark text; --text-inverse is light in dark theme (default). */
    color: var(--color-black);
}

.btn--primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
}

.btn--primary:active:not(:disabled) {
    background: var(--color-primary-active);
}

/* Secondary */
.btn--secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn--secondary:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--border-color-hover);
}

/* Danger */
.btn--danger {
    background: var(--color-error);
    color: white;
}

.btn--danger:hover:not(:disabled) {
    background: var(--color-error-hover);
}

/* Ghost */
.btn--ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn--ghost:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Text (link-style) */
.btn--text {
    background: transparent;
    color: var(--color-primary);
    padding: 0;
    height: auto;
}

.btn--text:hover:not(:disabled) {
    text-decoration: underline;
}

/* Sizes */
.btn--sm {
    height: var(--button-height-sm);
    padding: 0 var(--space-md);
    font-size: var(--font-size-sm);
}

.btn--lg {
    height: 56px;
    padding: 0 var(--space-xl);
    font-size: var(--font-size-lg);
}

/* Full width */
.btn--block {
    width: 100%;
}

/* Icon only */
.btn--icon {
    width: var(--button-height);
    padding: 0;
}

.btn--icon.btn--sm {
    width: var(--button-height-sm);
}

.btn--icon.btn--lg {
    width: 56px;
}

/* Loading state */
.btn--loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn--loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: btn-spin 0.6s linear infinite;
}

.btn--loading.btn--primary::after {
    border-color: white;
    border-right-color: transparent;
}

.btn--loading.btn--danger::after {
    border-color: white;
    border-right-color: transparent;
}

@keyframes btn-spin {
    to { transform: rotate(360deg); }
}

/* ═══════════════════════════════════════════════════════════════
   HELPER TEXT & ERRORS
   ═══════════════════════════════════════════════════════════════ */

.form-helper {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.form-error {
    font-size: var(--font-size-xs);
    color: var(--color-error);
    margin-top: var(--space-xs);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* Hide the error slot (and its ::before warning icon) when there is no error text.
   Without this, every field showed a red warning circle even when valid, because
   .form-error is display:flex and ::before renders unconditionally. (Founder asked
   "что значат эти сигнализации?" 2026-06-07 — answer: nothing; it was this bug.) */
.form-error:empty {
    display: none;
}

.form-error::before {
    content: '';
    width: 12px;
    height: 12px;
    background: currentColor;
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cpath d='M12 8v4'/%3E%3Cpath d='M12 16h.01'/%3E%3C/svg%3E");
    mask-size: contain;
    flex-shrink: 0;
}

/* Character counter */
.form-counter {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-align: right;
    margin-top: var(--space-xs);
}

.form-counter--warning {
    color: var(--color-warning);
}

.form-counter--error {
    color: var(--color-error);
}

/* ═══════════════════════════════════════════════════════════════
   INPUT ADDONS
   ═══════════════════════════════════════════════════════════════ */

.form-input-group {
    display: flex;
}

.form-input-group .form-input {
    border-radius: 0;
}

.form-input-group .form-input:first-child {
    border-top-left-radius: var(--border-radius);
    border-bottom-left-radius: var(--border-radius);
}

.form-input-group .form-input:last-child {
    border-top-right-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

.form-input-addon {
    display: flex;
    align-items: center;
    padding: 0 var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    white-space: nowrap;
}

.form-input-addon:first-child {
    border-right: none;
    border-top-left-radius: var(--border-radius);
    border-bottom-left-radius: var(--border-radius);
}

.form-input-addon:last-child {
    border-left: none;
    border-top-right-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

/* ═══════════════════════════════════════════════════════════════
   AUTOSAVE STATUS
   ═══════════════════════════════════════════════════════════════ */

.autosave-status {
    display: inline-block;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    transition: color var(--transition-fast);
    min-height: 1.25em;
}

.autosave-status:empty {
    visibility: hidden;
}

.autosave-status--dirty {
    color: var(--color-warning);
}

.autosave-status--saving {
    color: var(--text-muted);
}

.autosave-status--saving::after {
    content: '';
    display: inline-block;
    width: 12px;
    height: 12px;
    margin-left: var(--space-xs);
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: autosave-spin 0.6s linear infinite;
    vertical-align: middle;
}

@keyframes autosave-spin {
    to {
        transform: rotate(360deg);
    }
}

.autosave-status--saved {
    color: var(--color-success);
}

.autosave-status--error {
    color: var(--color-error);
}

/* ═══════════════════════════════════════════════════════════════
   REDUCED MOTION
   ═══════════════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
    .form-input,
    .form-textarea,
    .form-select,
    .form-checkbox__box,
    .form-radio__circle,
    .form-switch__track,
    .form-switch__track::after,
    .btn {
        transition: none;
    }

    .btn--loading::after,
    .autosave-status--saving::after {
        animation: none;
    }
}