/**
 * Component Styles
 * Buttons, Forms, Cards, Messages, Avatars, etc.
 */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-5);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    text-decoration: none;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}

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

.btn-secondary {
    background-color: var(--color-secondary);
    color: var(--color-white);
}

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

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

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

.btn-danger {
    background-color: var(--color-danger);
    color: var(--color-white);
}

.btn-danger:hover:not(:disabled) {
    background-color: #dc2626;
}

.btn-sm {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-6);
    font-size: var(--font-size-base);
}

.btn-block {
    width: 100%;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius);
    color: var(--color-text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.btn-icon:hover {
    background-color: var(--color-bg-secondary);
    color: var(--color-text);
}

.btn-send {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-full);
}

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

.btn-send:disabled {
    background-color: var(--color-gray-300);
}

/* Form Groups */
.form-group {
    margin-bottom: var(--spacing-4);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
}

.form-hint {
    display: block;
    margin-top: var(--spacing-1);
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.form-error {
    color: var(--color-danger);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-2);
}

.form-success {
    color: var(--color-success);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-2);
}

.form-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-4);
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    cursor: pointer;
    font-size: var(--font-size-sm);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
}

/* Switch */
.switch-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    cursor: pointer;
    margin-bottom: var(--spacing-3);
}

.switch-label:last-child {
    margin-bottom: 0;
}

.switch-label input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.switch {
    width: 44px;
    height: 24px;
    background: var(--color-gray-300);
    border-radius: var(--radius-full);
    position: relative;
    transition: background-color var(--transition-fast);
    flex-shrink: 0;
}

.switch::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: var(--color-white);
    border-radius: 50%;
    transition: transform var(--transition-fast);
}

.switch-label input:checked + .switch {
    background: var(--color-primary);
}

.switch-label input:checked + .switch::after {
    transform: translateX(20px);
}

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

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.avatar-lg {
    width: 56px;
    height: 56px;
    font-size: var(--font-size-lg);
}

/* Conversation Item */
.conversation-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    border-left: 3px solid transparent;
}

.conversation-item:hover {
    background-color: var(--color-bg-secondary);
}

.conversation-item.active {
    background-color: var(--color-primary-light);
    border-left-color: var(--color-primary);
}

.conversation-info {
    flex: 1;
    min-width: 0;
}

.conversation-name {
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-preview {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-1);
}

.conversation-time {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.unread-badge {
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Message Bubble */
.message {
    display: flex;
    gap: var(--spacing-2);
    max-width: var(--message-max-width);
    margin-bottom: var(--spacing-1);
}

.message.own {
    margin-left: auto;
    flex-direction: row-reverse;
}

.message-content {
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-lg);
    background: var(--color-message-other);
    color: var(--color-message-text-other);
    word-wrap: break-word;
    position: relative;
}

.message.own .message-content {
    background: var(--color-message-own);
    color: var(--color-message-text-own);
    border-bottom-right-radius: var(--radius-sm);
}

.message:not(.own) .message-content {
    border-bottom-left-radius: var(--radius-sm);
}

.message-text {
    margin: 0;
    white-space: pre-wrap;
}

.message-time {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    margin-top: var(--spacing-1);
    text-align: right;
}

.message.own .message-time {
    color: rgba(255, 255, 255, 0.7);
}

.message-status {
    font-size: var(--font-size-xs);
    margin-left: var(--spacing-1);
}

.message-edited {
    font-size: var(--font-size-xs);
    font-style: italic;
    opacity: 0.7;
}

/* Message Attachments */
.message-attachment {
    margin-top: var(--spacing-2);
    border-radius: var(--radius);
    overflow: hidden;
}

.message-attachment img {
    max-width: 300px;
    max-height: 300px;
    display: block;
}

.message-attachment-file {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3);
    background: rgba(0, 0, 0, 0.1);
    border-radius: var(--radius);
}

.message-attachment-icon {
    font-size: 1.5rem;
}

.message-attachment-info {
    flex: 1;
    min-width: 0;
}

.message-attachment-name {
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.message-attachment-size {
    font-size: var(--font-size-xs);
    opacity: 0.7;
}

/* Date Separator */
.date-separator {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: var(--spacing-6) 0;
}

.date-separator span {
    padding: var(--spacing-1) var(--spacing-3);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

/* Presence Indicator */
.presence-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid var(--color-bg);
    position: absolute;
    bottom: 0;
    right: 0;
}

.presence-indicator.online {
    background: var(--color-online);
}

.presence-indicator.away {
    background: var(--color-away);
}

.presence-indicator.busy {
    background: var(--color-danger);
}

.presence-indicator.offline {
    background: var(--color-offline);
}

/* Loading States */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-8);
    color: var(--color-text-secondary);
}

.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Alerts */
.alert {
    padding: var(--spacing-4);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-4);
}

.alert-success {
    background: var(--color-success-light);
    color: #166534;
}

.alert-danger {
    background: var(--color-danger-light);
    color: #991b1b;
}

.alert-warning {
    background: var(--color-warning-light);
    color: #92400e;
}

.alert-info {
    background: var(--color-info-light);
    color: #075985;
}

/* User Search Results */
.user-search-results {
    max-height: 200px;
    overflow-y: auto;
    margin: var(--spacing-3) 0;
}

.user-result-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    cursor: pointer;
    border-radius: var(--radius);
    transition: background-color var(--transition-fast);
}

.user-result-item:hover {
    background: var(--color-bg-secondary);
}

/* Selected Users */
.selected-users {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    margin: var(--spacing-3) 0;
}

.selected-user-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-1) var(--spacing-2);
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
}

.selected-user-chip button {
    color: var(--color-primary);
    font-size: 1rem;
    line-height: 1;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-1) var(--spacing-2);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-full);
}

.badge-success {
    background: var(--color-success-light);
    color: #166534;
}

.badge-warning {
    background: var(--color-warning-light);
    color: #92400e;
}

.badge-danger {
    background: var(--color-danger-light);
    color: #991b1b;
}

.badge-info {
    background: var(--color-info-light);
    color: #075985;
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 160px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    z-index: var(--z-dropdown);
    padding: var(--spacing-1) 0;
}

.dropdown-item {
    display: block;
    width: 100%;
    padding: var(--spacing-2) var(--spacing-4);
    text-align: left;
    font-size: var(--font-size-sm);
    color: var(--color-text);
    background: none;
    border: none;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--color-bg-secondary);
}

.dropdown-divider {
    height: 1px;
    background: var(--color-border);
    margin: var(--spacing-1) 0;
}

/* Tooltip */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-4px);
    padding: var(--spacing-1) var(--spacing-2);
    background: var(--color-gray-800);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    z-index: var(--z-tooltip);
}

[data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
}