/* ============================================
   NebulaChat Styles
   Modern Discord-like chat interface
   ============================================ */

/* === CSS Variables & Themes === */
:root {
  /* Color Palette - Light Theme */
  --color-brand: #5865F2;
  --color-brand-hover: #4752C4;
  --color-brand-active: #3C45A5;
  
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F2F3F5;
  --color-bg-tertiary: #E3E5E8;
  --color-bg-overlay: rgba(0, 0, 0, 0.85);
  --color-bg-floating: #FFFFFF;
  
  --color-text-primary: #060607;
  --color-text-secondary: #4E5058;
  --color-text-muted: #80848E;
  --color-text-link: #00A8FC;
  
  --color-interactive-normal: #4E5058;
  --color-interactive-hover: #060607;
  --color-interactive-active: var(--color-brand);
  
  --color-border: #E3E5E8;
  --color-divider: #DCDDDE;
  
  --color-status-online: #23A559;
  --color-status-idle: #F0B232;
  --color-status-dnd: #F23F43;
  --color-status-offline: #80848E;
  
  --color-danger: #DA373C;
  --color-warning: #FAA81A;
  --color-success: #248046;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Borders */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-radius-full: 50%;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --sidebar-width: 240px;
  --server-list-width: 72px;
  --members-width: 240px;
}

/* Dark Theme */
[data-theme="dark"] {
  --color-bg-primary: #313338;
  --color-bg-secondary: #2B2D31;
  --color-bg-tertiary: #1E1F22;
  --color-bg-floating: #111214;
  
  --color-text-primary: #F2F3F5;
  --color-text-secondary: #B5BAC1;
  --color-text-muted: #80848E;
  
  --color-interactive-normal: #B5BAC1;
  --color-interactive-hover: #DBDEE1;
  
  --color-border: #3F4147;
  --color-divider: #3F4147;
}

/* Auto Theme Detection */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg-primary: #313338;
    --color-bg-secondary: #2B2D31;
    --color-bg-tertiary: #1E1F22;
    --color-bg-floating: #111214;
    
    --color-text-primary: #F2F3F5;
    --color-text-secondary: #B5BAC1;
    --color-text-muted: #80848E;
    
    --color-interactive-normal: #B5BAC1;
    --color-interactive-hover: #DBDEE1;
    
    --color-border: #3F4147;
    --color-divider: #3F4147;
  }
}

/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  overflow: hidden;
}

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

a {
  color: var(--color-text-link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* === Layout === */
.app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* === Server List === */
.server-list {
  width: var(--server-list-width);
  background: var(--color-bg-tertiary);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-sm) 0;
  gap: var(--spacing-sm);
  overflow-y: auto;
  flex-shrink: 0;
}

.server-list::-webkit-scrollbar {
  width: 0;
}

.server-list__home {
  margin-bottom: var(--spacing-xs);
}

.server-list__separator {
  width: 32px;
  height: 2px;
  background: var(--color-divider);
  border-radius: 1px;
  margin: var(--spacing-xs) 0;
}

.server-list__items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  width: 100%;
  align-items: center;
}

.server-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-lg);
  background: var(--color-bg-floating);
  color: var(--color-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-radius var(--transition-fast), background var(--transition-fast);
  position: relative;
  flex-shrink: 0;
}

.server-icon:hover {
  border-radius: var(--border-radius-md);
  background: var(--color-brand);
  color: white;
}

.server-icon--active {
  border-radius: var(--border-radius-md);
  background: var(--color-brand);
  color: white;
}

.server-icon--active::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 40px;
  background: white;
  border-radius: 0 2px 2px 0;
}

.server-icon--home {
  background: transparent;
}

.server-icon--add {
  border: 2px dashed var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
}

.server-icon--add:hover {
  color: var(--color-brand);
  border-color: var(--color-brand);
  background: transparent;
}

.server-icon img {
  width: 100%;
  height: 100%;
  border-radius: inherit;
  object-fit: cover;
}

.server-icon__badge {
  position: absolute;
  bottom: -4px;
  right: -4px;
  min-width: 18px;
  height: 18px;
  background: var(--color-danger);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  border: 3px solid var(--color-bg-tertiary);
}

/* === Channel Sidebar === */
.channel-sidebar {
  width: var(--sidebar-width);
  background: var(--color-bg-secondary);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.guild-header {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.guild-header:hover {
  background: var(--color-bg-tertiary);
}

.guild-header__name {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.guild-header__dropdown {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.guild-header:hover .guild-header__dropdown {
  color: var(--color-text-primary);
}

.channel-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md) var(--spacing-sm);
}

.channel-list::-webkit-scrollbar {
  width: 8px;
}

.channel-list::-webkit-scrollbar-thumb {
  background: var(--color-bg-tertiary);
  border-radius: 4px;
}

.channel-category {
  margin-bottom: var(--spacing-sm);
}

.channel-category__header {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  user-select: none;
}

.channel-category__header:hover {
  color: var(--color-text-secondary);
}

.channel-category__icon {
  transition: transform var(--transition-fast);
}

.channel-category--collapsed .channel-category__icon {
  transform: rotate(-90deg);
}

.channel-category__items {
  margin-top: var(--spacing-xs);
}

.channel-category--collapsed .channel-category__items {
  display: none;
}

.channel-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  margin: 1px 0;
  border-radius: var(--border-radius-sm);
  color: var(--color-interactive-normal);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  position: relative;
}

.channel-item:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-interactive-hover);
}

.channel-item--active {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.channel-item__icon {
  flex-shrink: 0;
}

.channel-item__name {
  flex: 1;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.channel-item__badge {
  min-width: 16px;
  height: 16px;
  background: var(--color-danger);
  color: white;
  font-size: 11px;
  font-weight: var(--font-weight-semibold);
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

.channel-item__unread {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 8px;
  background: var(--color-text-primary);
  border-radius: 0 4px 4px 0;
}

/* === User Panel === */
.user-panel {
  padding: var(--spacing-sm);
  background: var(--color-bg-tertiary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}

.user-panel__avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--border-radius-full);
  background: var(--color-brand);
  flex-shrink: 0;
  position: relative;
}

.user-panel__avatar::after {
  content: '';
  position: absolute;
  bottom: -2px;
  right: -2px;
  width: 12px;
  height: 12px;
  background: var(--color-status-online);
  border: 3px solid var(--color-bg-tertiary);
  border-radius: var(--border-radius-full);
}

.user-panel__info {
  flex: 1;
  min-width: 0;
}

.user-panel__name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-panel__status {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-panel__actions {
  display: flex;
  gap: var(--spacing-xs);
}

.user-panel__btn {
  width: 32px;
  height: 32px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-interactive-normal);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.user-panel__btn:hover {
  background: var(--color-bg-secondary);
  color: var(--color-interactive-hover);
}

/* === Chat Main === */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--color-bg-primary);
  min-width: 0;
}

/* === Chat Header === */
.chat-header {
  height: 48px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-md);
  flex-shrink: 0;
}

.chat-header__left {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.chat-header__mobile-toggle {
  display: none;
}

.chat-header__icon {
  color: var(--color-text-muted);
}

.chat-header__title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
}

.chat-header__right {
  display: flex;
  gap: var(--spacing-sm);
}

.chat-header__btn {
  width: 24px;
  height: 24px;
  color: var(--color-interactive-normal);
  transition: color var(--transition-fast);
}

.chat-header__btn:hover {
  color: var(--color-interactive-hover);
}

/* === Messages === */
.messages-container {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.messages-scroll {
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
}

.messages-scroll::-webkit-scrollbar {
  width: 16px;
}

.messages-scroll::-webkit-scrollbar-thumb {
  background: var(--color-bg-tertiary);
  border: 4px solid var(--color-bg-primary);
  border-radius: 8px;
}

.messages-scroll::-webkit-scrollbar-track {
  background: transparent;
}

.messages-list {
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.message {
  padding: var(--spacing-xs) var(--spacing-md);
  margin: 0 -14px;
  border-radius: var(--border-radius-sm);
  display: flex;
  gap: var(--spacing-md);
  position: relative;
  transition: background var(--transition-fast);
}

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

.message--grouped {
  padding-top: 2px;
  padding-bottom: 2px;
  margin-top: -1px;
}

.message__avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-full);
  background: var(--color-brand);
  flex-shrink: 0;
  margin-top: 2px;
}

.message--grouped .message__avatar {
  opacity: 0;
  pointer-events: none;
}

.message__content-wrapper {
  flex: 1;
  min-width: 0;
}

.message__header {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
}

.message--grouped .message__header {
  display: none;
}

.message__author {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
}

.message__author:hover {
  text-decoration: underline;
}

.message__timestamp {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.message--grouped .message__timestamp {
  position: absolute;
  left: 0;
  top: 2px;
  opacity: 0;
  transition: opacity var(--transition-fast);
  font-size: 11px;
  width: 56px;
  text-align: right;
  padding-right: 8px;
}

.message--grouped:hover .message__timestamp {
  opacity: 1;
}

.message__text {
  font-size: var(--font-size-md);
  line-height: 1.375;
  word-wrap: break-word;
}

.message__text--edited::after {
  content: '(изменено)';
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-left: var(--spacing-xs);
}

.message__text code {
  background: var(--color-bg-tertiary);
  padding: 2px 4px;
  border-radius: 3px;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.875em;
}

.message__text pre {
  background: var(--color-bg-tertiary);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  overflow-x: auto;
  margin: var(--spacing-xs) 0;
}

.message__text pre code {
  background: none;
  padding: 0;
}

.message__text blockquote {
  border-left: 4px solid var(--color-border);
  padding-left: var(--spacing-sm);
  margin: var(--spacing-xs) 0;
  color: var(--color-text-secondary);
}

.message__text strong {
  font-weight: var(--font-weight-bold);
}

.message__text em {
  font-style: italic;
}

.message__mention {
  background: rgba(88, 101, 242, 0.15);
  color: var(--color-brand);
  padding: 0 2px;
  border-radius: 3px;
  cursor: pointer;
  font-weight: var(--font-weight-medium);
}

.message__mention:hover {
  background: rgba(88, 101, 242, 0.25);
}

.message__reactions {
  display: flex;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
  flex-wrap: wrap;
}

.reaction {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  padding: 4px 8px;
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.reaction:hover {
  border-color: var(--color-text-muted);
}

.reaction--active {
  background: rgba(88, 101, 242, 0.15);
  border-color: var(--color-brand);
  color: var(--color-brand);
}

.reaction__emoji {
  font-size: 16px;
  line-height: 1;
}

.reaction__count {
  font-weight: var(--font-weight-medium);
}

.message__actions {
  position: absolute;
  top: -16px;
  right: var(--spacing-md);
  background: var(--color-bg-floating);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  padding: 4px;
  display: none;
  gap: 4px;
  box-shadow: var(--shadow-md);
}

.message:hover .message__actions {
  display: flex;
}

.message__action-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-interactive-normal);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.message__action-btn:hover {
  background: var(--color-bg-secondary);
  color: var(--color-interactive-hover);
}

/* === Message Composer === */
.message-composer {
  padding: var(--spacing-md);
  flex-shrink: 0;
}

.message-composer__attach {
  position: absolute;
  left: var(--spacing-md);
  bottom: calc(var(--spacing-md) + 12px);
  width: 32px;
  height: 32px;
  border-radius: var(--border-radius-full);
  background: var(--color-bg-secondary);
  color: var(--color-interactive-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
  z-index: 1;
}

.message-composer__attach:hover {
  background: var(--color-bg-tertiary);
}

.message-composer__input-wrapper {
  background: var(--color-bg-secondary);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-sm) 48px var(--spacing-sm) 48px;
  position: relative;
}

.message-composer__input {
  min-height: 24px;
  max-height: 200px;
  overflow-y: auto;
  font-size: var(--font-size-md);
  line-height: 1.5;
  outline: none;
  word-wrap: break-word;
}

.message-composer__input:empty::before {
  content: attr(data-placeholder);
  color: var(--color-text-muted);
  pointer-events: none;
}

.message-composer__actions {
  position: absolute;
  right: var(--spacing-md);
  bottom: 12px;
}

.message-composer__btn {
  width: 32px;
  height: 32px;
  color: var(--color-interactive-normal);
  transition: color var(--transition-fast);
}

.message-composer__btn:hover {
  color: var(--color-interactive-hover);
}

/* === Members Sidebar === */
.members-sidebar {
  width: var(--members-width);
  background: var(--color-bg-secondary);
  overflow-y: auto;
  flex-shrink: 0;
}

.members-sidebar::-webkit-scrollbar {
  width: 8px;
}

.members-sidebar::-webkit-scrollbar-thumb {
  background: var(--color-bg-tertiary);
  border-radius: 4px;
}

.members-list {
  padding: var(--spacing-md) var(--spacing-sm);
}

.members-group {
  margin-bottom: var(--spacing-md);
}

.members-group__title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: var(--spacing-xs) var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
}

.member-item {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.member-item:hover {
  background: var(--color-bg-tertiary);
}

.member-item__avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--border-radius-full);
  background: var(--color-brand);
  position: relative;
  flex-shrink: 0;
}

.member-item__status {
  position: absolute;
  bottom: -2px;
  right: -2px;
  width: 12px;
  height: 12px;
  background: var(--color-status-online);
  border: 3px solid var(--color-bg-secondary);
  border-radius: var(--border-radius-full);
}

.member-item__status--idle {
  background: var(--color-status-idle);
}

.member-item__status--dnd {
  background: var(--color-status-dnd);
}

.member-item__status--offline {
  background: var(--color-status-offline);
}

.member-item__name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* === Context Menu === */
.context-menu {
  position: fixed;
  background: var(--color-bg-floating);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  padding: 6px;
  min-width: 200px;
  z-index: 1000;
  animation: contextMenuShow 150ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes contextMenuShow {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.context-menu__item {
  padding: 8px 12px;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  color: var(--color-text-primary);
}

.context-menu__item:hover {
  background: var(--color-brand);
  color: white;
}

.context-menu__item--danger {
  color: var(--color-danger);
}

.context-menu__item--danger:hover {
  background: var(--color-danger);
  color: white;
}

.context-menu__separator {
  height: 1px;
  background: var(--color-divider);
  margin: 4px 0;
}

/* === Modal === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  animation: fadeIn 200ms ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal {
  background: var(--color-bg-floating);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: modalShow 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalShow {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal__header {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

.modal__close {
  width: 32px;
  height: 32px;
  border-radius: var(--border-radius-sm);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.modal__close:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.modal__body {
  padding: var(--spacing-md);
  overflow-y: auto;
  flex: 1;
}

.modal__footer {
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
}

/* === Command Palette === */
.command-palette {
  position: fixed;
  inset: 0;
  background: var(--color-bg-overlay);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 20vh;
  z-index: 3000;
  animation: fadeIn 150ms ease-out;
}

.command-palette__content {
  background: var(--color-bg-floating);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  width: 600px;
  max-width: 90%;
  overflow: hidden;
  animation: modalShow 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

.command-palette__input {
  width: 100%;
  padding: var(--spacing-md);
  background: transparent;
  border: none;
  outline: none;
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border);
}

.command-palette__results {
  max-height: 400px;
  overflow-y: auto;
  padding: var(--spacing-sm);
}

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

.command-result:hover,
.command-result--selected {
  background: var(--color-brand);
  color: white;
}

.command-result__icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.command-result__content {
  flex: 1;
}

.command-result__title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
}

.command-result__subtitle {
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

/* === Form Elements === */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input {
  width: 100%;
  padding: var(--spacing-sm);
  background: var(--color-bg-tertiary);
  border: 1px solid transparent;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-md);
  color: var(--color-text-primary);
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  border-color: var(--color-brand);
}

.form-textarea {
  width: 100%;
  min-height: 100px;
  padding: var(--spacing-sm);
  background: var(--color-bg-tertiary);
  border: 1px solid transparent;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-md);
  color: var(--color-text-primary);
  font-family: inherit;
  outline: none;
  resize: vertical;
  transition: border-color var(--transition-fast);
}

.form-textarea:focus {
  border-color: var(--color-brand);
}

/* === Buttons === */
.btn {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

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

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

.btn--secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

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

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

.btn--danger:hover {
  opacity: 0.9;
}

/* === Toast === */
.toast-container {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 4000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-width: 400px;
}

.toast {
  background: var(--color-bg-floating);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-lg);
  animation: toastSlide 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes toastSlide {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.toast--success {
  border-color: var(--color-success);
}

.toast--error {
  border-color: var(--color-danger);
}

.toast--warning {
  border-color: var(--color-warning);
}

/* === Skeleton Loading === */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 0%,
    var(--color-bg-secondary) 50%,
    var(--color-bg-tertiary) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--border-radius-sm);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* === Accessibility === */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

button:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 2px;
}

/* === Responsive === */
@media (max-width: 1024px) {
  .members-sidebar {
    display: none;
  }
  
  .members-sidebar.is-open {
    display: block;
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: var(--shadow-lg);
  }
}

@media (max-width: 768px) {
  :root {
    --server-list-width: 56px;
    --sidebar-width: 200px;
  }
  
  .server-icon {
    width: 40px;
    height: 40px;
  }
  
  .channel-sidebar {
    position: absolute;
    left: var(--server-list-width);
    top: 0;
    bottom: 0;
    z-index: 99;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }
  
  .channel-sidebar.is-open {
    transform: translateX(0);
  }
  
  .chat-header__mobile-toggle {
    display: flex;
  }
}

@media (max-width: 480px) {
  .message-composer__attach {
    display: none;
  }
  
  .message-composer__input-wrapper {
    padding-left: var(--spacing-md);
  }
}

/* === Utilities === */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.flex {
  display: flex;
}

.items-center {
  align-items: center;
}

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

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}