*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-family);
  font-size: var(--font-base);
  font-weight: var(--fw-normal);
  line-height: var(--line-height);
  color: var(--text-primary);
  background-color: var(--bg-app);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

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

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

input,
textarea {
  font-family: inherit;
  border: none;
  background: none;
  color: inherit;
  font-size: inherit;
  outline: none;
}

img {
  display: block;
  max-width: 100%;
}

ul, ol {
  list-style: none;
}

::-webkit-scrollbar {
  width: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.15);
}

* {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.08) transparent;
}

[data-theme="light"] ::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.12);
}

[data-theme="light"] ::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.2);
}

[data-theme="light"] * {
  scrollbar-color: rgba(0, 0, 0, 0.12) transparent;
}

#app {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  position: relative;
}

.avatar {
  position: relative;
  flex-shrink: 0;
  width: var(--avatar-md);
  height: var(--avatar-md);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--fw-semibold);
  font-size: var(--font-sm);
  color: var(--text-inverse);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  overflow: hidden;
}

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

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

.avatar__status {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  border: 2.5px solid var(--bg-sidebar);
  background-color: var(--offline);
}

.avatar__status--online {
  background-color: var(--online);
  box-shadow: 0 0 8px var(--online-glow);
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 10px;
  background: var(--badge-gradient);
  color: var(--text-inverse);
  font-size: var(--font-xs);
  font-weight: var(--fw-bold);
  line-height: 1;
  box-shadow: 0 2px 8px rgba(139, 92, 246, 0.3);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: all var(--t-fast);
}

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

.icon-btn:active {
  transform: scale(0.92);
}

.icon-btn svg {
  width: 20px;
  height: 20px;
  stroke-width: 1.75;
}

.truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-12px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(12px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to   { opacity: 1; transform: scale(1); }
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.5; }
}

@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); }
  40%           { transform: translateY(-6px); }
}

@keyframes typingDot {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30%           { transform: translateY(-4px); opacity: 1; }
}

.confirm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--t-base);
}

.confirm-overlay--visible {
  opacity: 1;
}

.confirm-modal {
  background: var(--bg-surface-solid);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  width: 340px;
  max-width: 90vw;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  box-shadow: var(--shadow-lg);
  transform: scale(0.92) translateY(8px);
  transition: transform var(--t-base);
  text-align: center;
}

.confirm-overlay--visible .confirm-modal {
  transform: scale(1) translateY(0);
}

.confirm-modal__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-1);
}

.confirm-modal__icon--danger {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
}

.confirm-modal__icon--info {
  background: var(--accent-muted);
  color: var(--accent-light);
}

.confirm-modal__icon svg {
  width: 26px;
  height: 26px;
  stroke-width: 1.75;
}

.confirm-modal__title {
  font-size: var(--font-lg);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  line-height: 1.3;
}

.confirm-modal__desc {
  font-size: var(--font-sm);
  color: var(--text-muted);
  line-height: 1.5;
  max-width: 260px;
}

.confirm-modal__actions {
  display: flex;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
  width: 100%;
}

.confirm-modal__btn {
  flex: 1;
  height: 40px;
  border-radius: var(--radius-sm);
  font-size: var(--font-sm);
  font-weight: var(--fw-semibold);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--t-fast);
}

.confirm-modal__btn--cancel {
  background: var(--bg-glass-hover);
  color: var(--text-secondary);
  border-color: var(--border);
}

.confirm-modal__btn--cancel:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
}

.confirm-modal__btn--danger {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.25);
}

.confirm-modal__btn--danger:hover {
  background: rgba(239, 68, 68, 0.25);
  border-color: rgba(239, 68, 68, 0.4);
}

.confirm-modal__btn--primary {
  background: var(--accent-muted);
  color: var(--accent-light);
  border-color: var(--border-accent);
}

.confirm-modal__btn--primary:hover {
  background: rgba(139, 92, 246, 0.25);
}

.confirm-modal__btn:active {
  transform: scale(0.97);
}

.mention-link {
  color: var(--accent-light);
  font-weight: var(--fw-semibold);
  cursor: pointer;
  border-radius: var(--radius-xs);
  padding: 0 3px;
  background: var(--accent-muted);
  transition: all var(--t-fast);
  display: inline-block;
}

.mention-link:hover {
  background: rgba(139, 92, 246, 0.25);
  color: #c4b5fd;
}

.message--sent .mention-link {
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.9);
}

.message--sent .mention-link:hover {
  background: rgba(255, 255, 255, 0.25);
}