/* ============================================
   Современные UI компоненты
   ============================================ */

/* Header */
.header {
    background-color: white;
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-lg) var(--spacing-2xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    z-index: 100;
}

.header__brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header__logo {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

.header__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.header__actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Input Area Content Type Dropdown */
.input-content-dropdown {
    position: relative;
    flex-shrink: 0;
}

.input-content-dropdown__trigger {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    height: 40px;
    padding: 0 var(--spacing-md);
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.input-content-dropdown__trigger:hover:not(:disabled) {
    background: white;
    color: var(--text-primary);
    border-color: var(--primary);
    transform: none;
    box-shadow: none;
}

.input-content-dropdown__trigger:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.input-content-dropdown__icon {
    width: 16px;
    height: 16px;
    fill: currentColor;
    transition: transform var(--transition);
}

.input-content-dropdown--open .input-content-dropdown__icon {
    transform: rotate(180deg);
}

.input-content-dropdown__menu {
    position: absolute;
    bottom: calc(100% + 8px);
    right: 0;
    min-width: 180px;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all var(--transition);
    z-index: 1000;
}

.input-content-dropdown--open .input-content-dropdown__menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.input-content-dropdown__item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-sm);
    color: #333;
    cursor: pointer;
    transition: background var(--transition);
    background: white;
}

.input-content-dropdown__item:hover {
    background: #f0f7ff;
}

.input-content-dropdown__item:first-child {
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.input-content-dropdown__item:last-child {
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.input-content-dropdown__check {
    width: 16px;
    height: 16px;
    fill: var(--primary);
    opacity: 0;
    transition: opacity var(--transition);
    flex-shrink: 0;
}

.input-content-dropdown__item--active {
    color: var(--primary);
    background: #f0f7ff;
}

.input-content-dropdown__item--active .input-content-dropdown__check {
    opacity: 1;
}

/* Header Content Type Dropdown */
.header-content-dropdown {
    position: relative;
}

.header-content-dropdown__trigger {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.header-content-dropdown__trigger:hover {
    background: white !important;
    border-color: var(--primary);
    color: var(--text-primary);
    transform: none !important;
    box-shadow: none !important;
}

.header-content-dropdown__icon {
    width: 16px;
    height: 16px;
    fill: currentColor;
    transition: transform var(--transition);
}

.header-content-dropdown--open .header-content-dropdown__icon {
    transform: rotate(180deg);
}

.header-content-dropdown__menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 200px;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition);
    z-index: 1000;
}

.header-content-dropdown--open .header-content-dropdown__menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.header-content-dropdown__item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-sm);
    color: #333;
    cursor: pointer;
    transition: background var(--transition);
    position: relative;
    background: white;
}

.header-content-dropdown__item:hover {
    background: #f0f7ff;
}

.header-content-dropdown__item:first-child {
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.header-content-dropdown__item:last-child {
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.header-content-dropdown__check {
    width: 16px;
    height: 16px;
    fill: var(--primary);
    opacity: 0;
    transition: opacity var(--transition);
    flex-shrink: 0;
}

.header-content-dropdown__item--active {
    color: var(--primary);
    background: #f0f7ff;
}

.header-content-dropdown__item--active .header-content-dropdown__check {
    opacity: 1;
}

.header__user {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition);
}

.header__user:hover {
    background-color: var(--surface);
}

.header__avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary) 0%, #3B82F6 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.header__username {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.header__model-selector {
    margin-right: var(--spacing-md);
}

.header__model-select {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-xs);
    font-family: inherit;
    font-weight: 500;
    color: var(--text-primary);
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
}

.header__model-select:hover {
    border-color: var(--primary);
    background-color: white;
}

.header__model-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-sm);
    background-color: var(--surface);
    color: var(--text-secondary);
}

.badge--success { background-color: #D1FAE5; color: var(--success); }
.badge--warning { background-color: #FEF3C7; color: var(--warning); }
.badge--error { background-color: #FEE2E2; color: var(--error); }
.badge--primary { background-color: var(--primary-light); color: var(--primary); }

/* Card */
.card {
    background-color: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

/* Empty state */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-3xl);
    text-align: center;
}

.empty-state__icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-lg);
    color: var(--text-muted);
    opacity: 0.5;
}

.empty-state__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.empty-state__description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    max-width: 480px;
    margin: 0;
    line-height: 1.6;
}

.empty-state__topics {
    margin-top: var(--spacing-xl);
    max-width: 520px;
    text-align: left;
}

.empty-state__topics-label {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin: 0 0 var(--spacing-sm) 0;
    line-height: 1.6;
}

.empty-state__topics-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.empty-state__topics-list li {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.6;
    padding-left: 1.25em;
    position: relative;
}

.empty-state__topics-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* Loading spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner--sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

.spinner--lg {
    width: 32px;
    height: 32px;
    border-width: 3px;
}

/* Divider */
.divider {
    height: 1px;
    background-color: var(--border);
    margin: var(--spacing-lg) 0;
}

/* Avatar */
.avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.avatar--sm {
    width: 32px;
    height: 32px;
    font-size: var(--font-size-xs);
}

.avatar--lg {
    width: 48px;
    height: 48px;
    font-size: var(--font-size-base);
}

.avatar--user {
    background: linear-gradient(135deg, #64748B 0%, #94A3B8 100%);
    color: white;
}

.avatar--assistant {
    background: linear-gradient(135deg, var(--primary) 0%, #3B82F6 100%);
    color: white;
}

/* Tooltip */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--text-primary);
    color: white;
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    margin-bottom: var(--spacing-xs);
    z-index: 1000;
}

/* ============================================
   Иконка редактирования в шапке (профиль)
   ============================================ */
.header__user-edit-icon {
    width: 14px;
    height: 14px;
    fill: var(--text-secondary);
    opacity: 0;
    transition: opacity var(--transition);
    flex-shrink: 0;
}

.header__user:hover .header__user-edit-icon {
    opacity: 1;
}

/* ============================================
   Модальное окно профиля пользователя
   ============================================ */
.user-profile-modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.user-profile-modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(2px);
}

.user-profile-modal__panel {
    position: relative;
    background: white;
    border-radius: var(--radius-xl, 12px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
    width: 480px;
    max-width: calc(100vw - 32px);
    max-height: calc(100vh - 64px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.user-profile-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-xl) var(--spacing-2xl);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.user-profile-modal__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.user-profile-modal__close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 22px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition), color var(--transition);
    line-height: 1;
}

.user-profile-modal__close:hover {
    background: var(--surface);
    color: var(--text-primary);
}

.user-profile-modal__body {
    padding: var(--spacing-xl) var(--spacing-2xl);
    overflow-y: auto;
    flex: 1;
}

.user-profile-field {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
}

.user-profile-field:last-of-type {
    margin-bottom: 0;
}

.user-profile-field__label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.user-profile-field__sublabel {
    font-size: var(--font-size-xs);
    font-weight: 400;
    color: var(--text-secondary);
}

.user-profile-field__input {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-family: inherit;
    color: var(--text-primary);
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
    width: 100%;
    box-sizing: border-box;
}

.user-profile-field__input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.user-profile-field__input--readonly {
    background: var(--surface);
    color: var(--text-secondary);
    cursor: not-allowed;
    border-style: dashed;
}

.user-profile-field__hint {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.user-profile-modal__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-xl);
    margin-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
}

.user-profile-modal__footer-actions {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.btn-danger {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-sm);
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    background: transparent;
    color: var(--error, #d32f2f);
    border-color: var(--error, #d32f2f);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.btn-danger:hover {
    background: var(--error, #d32f2f);
    color: #fff;
}