/* ==========================================================================
   BUCKET CHAT — COMPONENT & WORKSPACE STYLES
   Warm Light Palette (Cream, Charcoal Olive, Burnt Rust, Terracotta, Sage)
   Zero Emojis in styles & strict structural hierarchy
   ========================================================================== */

/* Main Container Views */
#app {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  background-color: var(--bg-app);
}

.view-hidden {
  display: none !important;
}

/* ==========================================================================
   1. AUTH / ONBOARDING VIEW
   ========================================================================== */
.auth-container {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background-color: var(--bg-app);
  background-image: 
    radial-gradient(var(--border-subtle) 1px, transparent 1px),
    radial-gradient(var(--border-subtle) 1px, var(--bg-app) 1px);
  background-size: 24px 24px;
  background-position: 0 0, 12px 12px;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  animation: modalEnter 0.3s var(--ease-standard);
}

@keyframes modalEnter {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.99);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.auth-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  width: 34px;
  height: 34px;
  background-color: var(--accent-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-inverse);
  flex-shrink: 0;
}

.brand-icon svg {
  width: 18px;
  height: 18px;
}

.brand-title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.auth-subtitle {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-normal);
}

/* Tabs */
.auth-tabs {
  display: flex;
  background-color: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 3px;
  gap: 4px;
}

.tab-btn {
  flex: 1;
  padding: 0.5rem 0.75rem;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-tertiary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-standard);
  text-align: center;
}

.tab-btn.active {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  font-weight: var(--font-semibold);
  box-shadow: var(--shadow-sm);
}

/* Form Controls */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input-field {
  width: 100%;
  height: 40px;
  padding: 0 0.875rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--text-sm);
  transition: border-color var(--duration-fast) var(--ease-standard), box-shadow var(--duration-fast) var(--ease-standard);
}

.input-field:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(171, 63, 34, 0.15);
}

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

.input-code {
  font-family: var(--font-family-mono);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.btn-primary {
  width: 100%;
  height: 42px;
  background-color: var(--accent-primary);
  color: var(--text-inverse);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: background-color var(--duration-fast) var(--ease-standard), transform var(--duration-fast) var(--ease-standard);
  margin-top: 0.5rem;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--accent-primary-hover);
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

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

.form-alert {
  padding: 0.625rem 0.875rem;
  background-color: var(--accent-danger-muted);
  border: 1px solid var(--accent-danger);
  border-radius: var(--radius-md);
  color: var(--accent-danger);
  font-size: var(--text-xs);
  display: none;
}

/* ==========================================================================
   2. MAIN WORKSPACE VIEW & HEADER
   ========================================================================== */
.workspace-container {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.workspace-header {
  height: 56px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  z-index: 10;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.bucket-info {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.bucket-name-display {
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--text-primary);
}

.bucket-code-pill {
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  background-color: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.5rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.375rem;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
}

.bucket-code-pill:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
  background-color: var(--bg-surface-active);
}

.pin-reveal-pill {
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  background-color: var(--accent-gold-muted);
  border: 1px solid var(--accent-gold);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.5rem;
  color: #785a1a;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  cursor: pointer;
  user-select: none;
  font-weight: var(--font-medium);
}

.header-center {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

/* Capacity Indicator */
.capacity-indicator {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  background-color: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.625rem;
}

.capacity-text {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--text-secondary);
}

.capacity-bar-track {
  width: 60px;
  height: 6px;
  background-color: var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.capacity-bar-fill {
  height: 100%;
  background-color: var(--accent-sage);
  width: 3.33%;
  transition: width 0.3s var(--ease-standard), background-color 0.3s var(--ease-standard);
}

.capacity-bar-fill.near-full {
  background-color: var(--accent-gold);
}

.capacity-bar-fill.full {
  background-color: var(--accent-danger);
}

/* Latency & Status */
.connection-badge {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-xs);
  font-family: var(--font-family-mono);
  color: var(--text-secondary);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-sage);
}

.status-dot.disconnected {
  background-color: var(--accent-danger);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  background-color: transparent;
  border: 1px solid transparent;
  transition: all var(--duration-fast) var(--ease-standard);
}

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

.icon-btn svg {
  width: 16px;
  height: 16px;
}

.btn-secondary {
  height: 34px;
  padding: 0 0.75rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.375rem;
  transition: all var(--duration-fast) var(--ease-standard);
}

.btn-secondary:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background-color: var(--bg-surface-subtle);
}

.btn-danger-outline {
  height: 34px;
  padding: 0 0.75rem;
  background-color: transparent;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  gap: 0.375rem;
  transition: all var(--duration-fast) var(--ease-standard);
}

.btn-danger-outline:hover {
  background-color: var(--accent-danger-muted);
  border-color: var(--accent-primary);
}

/* ==========================================================================
   3. WORKSPACE 3-COLUMN BODY
   ========================================================================== */
.workspace-body {
  flex: 1;
  display: flex;
  overflow: hidden;
  background-color: var(--bg-app);
}

/* LEFT COLUMN: HOST PANEL / CONTROLS */
.host-panel {
  width: 260px;
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-medium);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  flex-shrink: 0;
  transition: width 0.25s var(--ease-standard);
}

.host-panel.collapsed {
  width: 0;
  border-right: none;
  overflow: hidden;
}

.panel-section {
  padding: 1.125rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.panel-heading {
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.host-badge-tag {
  font-size: 10px;
  padding: 1px 6px;
  background-color: var(--accent-primary-muted);
  border: 1px solid var(--accent-primary);
  color: var(--accent-primary);
  border-radius: var(--radius-sm);
  font-weight: var(--font-bold);
}

.control-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.control-label-group {
  display: flex;
  flex-direction: column;
}

.control-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.control-desc {
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

/* Switch Toggle */
.toggle-switch {
  position: relative;
  width: 38px;
  height: 22px;
  display: inline-block;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--bg-surface-subtle);
  border: 1px solid var(--border-medium);
  transition: 0.2s var(--ease-standard);
  border-radius: 20px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 3px;
  bottom: 3px;
  background-color: var(--text-secondary);
  transition: 0.2s var(--ease-standard);
  border-radius: 50%;
}

input:checked + .toggle-slider {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
}

input:checked + .toggle-slider:before {
  transform: translateX(16px);
  background-color: var(--text-inverse);
}

.btn-panel-action {
  width: 100%;
  padding: 0.5rem 0.75rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all var(--duration-fast) var(--ease-standard);
}

.btn-panel-action:hover {
  background-color: var(--bg-surface-subtle);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.btn-panel-action.danger {
  color: var(--accent-primary);
  border-color: var(--border-subtle);
}

.btn-panel-action.danger:hover {
  background-color: var(--accent-danger-muted);
  border-color: var(--accent-primary);
  color: var(--accent-primary-hover);
}

/* CENTER COLUMN: REAL-TIME STREAM & COMPOSER */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-app);
  position: relative;
  overflow: hidden;
}

/* Messages Stream */
.messages-viewport {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.chat-empty-state {
  margin: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  text-align: center;
  max-width: 320px;
}

.chat-empty-state svg {
  width: 40px;
  height: 40px;
  color: var(--border-medium);
}

.empty-title {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--text-primary);
}

.empty-desc {
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

/* Message Item */
.message-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  max-width: 82%;
  position: relative;
  animation: messageSlide 0.2s var(--ease-standard);
}

@keyframes messageSlide {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message-row.self {
  align-self: flex-end;
}

.message-row.other {
  align-self: flex-start;
}

.message-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-xs);
}

.message-sender {
  font-weight: var(--font-bold);
  color: var(--text-primary);
}

.message-row.self .message-sender {
  color: var(--accent-terracotta);
}

.role-badge {
  font-size: 9px;
  padding: 1px 5px;
  border-radius: var(--radius-sm);
  font-weight: var(--font-bold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.role-badge.host {
  background-color: var(--accent-primary-muted);
  border: 1px solid var(--accent-primary);
  color: var(--accent-primary);
}

.role-badge.member {
  background-color: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.message-time {
  color: var(--text-muted);
  font-size: 11px;
}

.message-bubble {
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  line-height: var(--line-height-relaxed);
  word-break: break-word;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.message-row.other .message-bubble {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  border-top-left-radius: 2px;
}

.message-row.self .message-bubble {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--accent-secondary);
  color: var(--text-primary);
  border-top-right-radius: 2px;
}

.message-row.whisper .message-bubble {
  background-color: var(--accent-chestnut-muted);
  border: 1px solid var(--accent-chestnut);
  color: var(--text-primary);
}

.whisper-tag {
  font-size: 10px;
  font-weight: var(--font-bold);
  color: var(--accent-chestnut);
  text-transform: uppercase;
  margin-right: 4px;
}

/* System Notice & Action Divider */
.system-notice-row {
  align-self: center;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0.375rem 0;
  width: 100%;
}

.system-notice-line {
  flex: 1;
  height: 1px;
  background-color: var(--border-medium);
}

.system-notice-pill {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.625rem;
  max-width: 90%;
  text-align: center;
  font-weight: var(--font-medium);
}

.system-notice-pill.action {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background-color: var(--accent-primary-muted);
}

/* Message Hover Actions (Clean Icons, zero emojis) */
.message-actions-hover {
  position: absolute;
  top: -14px;
  right: 8px;
  display: none;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 2px;
  gap: 2px;
  box-shadow: var(--shadow-md);
  z-index: 5;
}

.message-row:hover .message-actions-hover {
  display: flex;
}

.action-mini-btn {
  height: 22px;
  padding: 0 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: var(--font-semibold);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  background-color: transparent;
  transition: all var(--duration-fast);
}

.action-mini-btn:hover {
  background-color: var(--bg-surface-subtle);
  color: var(--text-primary);
}

.action-mini-btn svg {
  width: 12px;
  height: 12px;
}

/* Reactions Bar */
.reactions-tray {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 3px;
}

.reaction-pill {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 7px;
  font-size: 11px;
  font-weight: var(--font-semibold);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
}

.reaction-pill:hover {
  border-color: var(--border-medium);
  background-color: var(--bg-surface-subtle);
}

.reaction-pill.reacted {
  background-color: var(--accent-primary-muted);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Reply / Whisper Banner */
.context-banner {
  padding: 0.5rem 1rem;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--accent-chestnut);
  font-weight: var(--font-semibold);
}

.context-banner.hidden {
  display: none;
}

/* Typing Indicator */
.typing-bar {
  height: 24px;
  padding: 0 1.25rem;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.typing-dots {
  display: inline-flex;
  gap: 2px;
}

.typing-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--text-secondary);
  animation: typingBounce 1.2s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-3px); }
}

/* Composer Area */
.chat-composer-container {
  padding: 0 1.25rem 1.25rem 1.25rem;
  background-color: var(--bg-app);
}

.composer-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  padding: 0.625rem;
  gap: 0.5rem;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--duration-fast) var(--ease-standard), box-shadow var(--duration-fast) var(--ease-standard);
}

.composer-box:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(171, 63, 34, 0.12);
}

.composer-textarea {
  width: 100%;
  min-height: 42px;
  max-height: 140px;
  resize: none;
  font-size: var(--text-sm);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
}

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

.composer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.char-counter {
  font-size: 11px;
}

.btn-send {
  height: 32px;
  padding: 0 0.875rem;
  background-color: var(--accent-primary);
  color: var(--text-inverse);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 0.375rem;
  transition: all var(--duration-fast) var(--ease-standard);
}

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

.btn-send:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* Disabled Speech Banner */
.composer-disabled-banner {
  padding: 0.75rem 1rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-md);
  color: var(--accent-primary);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

/* RIGHT COLUMN: MEMBER ROSTER (MAX 30) */
.roster-panel {
  width: 260px;
  background-color: var(--bg-surface);
  border-left: 1px solid var(--border-medium);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
}

.roster-header {
  padding: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.roster-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.roster-heading {
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.roster-count {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--text-secondary);
  background-color: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
}

.roster-search-input {
  height: 32px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0 0.625rem;
  font-size: var(--text-xs);
  color: var(--text-primary);
}

.roster-search-input:focus {
  border-color: var(--border-focus);
}

.roster-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.roster-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.625rem;
  border-radius: var(--radius-md);
  transition: background-color var(--duration-fast) var(--ease-standard);
  position: relative;
}

.roster-item:hover {
  background-color: var(--bg-surface-subtle);
}

.roster-user-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow: hidden;
}

.avatar-circle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--bg-surface-subtle);
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  color: var(--text-secondary);
  position: relative;
  flex-shrink: 0;
}

.avatar-circle.host {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background-color: var(--accent-primary-muted);
}

.online-indicator {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-sage);
  border: 1.5px solid var(--bg-surface);
}

.online-indicator.offline {
  background-color: var(--text-muted);
}

.roster-names {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.roster-username {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.roster-meta-tags {
  display: flex;
  align-items: center;
  gap: 4px;
}

.tag-muted {
  font-size: 9px;
  color: var(--accent-primary);
  font-weight: var(--font-bold);
}

.roster-actions {
  display: flex;
  align-items: center;
  gap: 2px;
}

/* Action Dropdown Menu (No emojis) */
.action-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  right: 0;
  top: 100%;
  width: 170px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 4px;
  display: none;
  flex-direction: column;
  gap: 2px;
  z-index: 100;
}

.dropdown-menu.show {
  display: flex;
}

.dropdown-item {
  padding: 0.375rem 0.625rem;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--duration-fast);
  text-align: left;
  font-weight: var(--font-medium);
}

.dropdown-item:hover {
  background-color: var(--bg-surface-subtle);
  color: var(--text-primary);
}

.dropdown-item.danger {
  color: var(--accent-primary);
}

.dropdown-item.danger:hover {
  background-color: var(--accent-danger-muted);
  color: var(--accent-primary-hover);
}

/* ==========================================================================
   4. TOAST NOTIFICATIONS
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 1000;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 0.625rem 1rem;
  box-shadow: var(--shadow-md);
  font-size: var(--text-xs);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
  font-weight: var(--font-medium);
  animation: toastIn 0.25s var(--ease-standard);
  max-width: 320px;
}

.toast.success { border-color: var(--accent-sage); }
.toast.warning { border-color: var(--accent-gold); }
.toast.danger { border-color: var(--accent-primary); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(8px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ==========================================================================
   5. RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 900px) {
  .host-panel {
    position: absolute;
    left: 0;
    top: 56px;
    bottom: 0;
    z-index: 20;
    box-shadow: var(--shadow-lg);
  }
  .roster-panel {
    width: 220px;
  }
}

@media (max-width: 768px) {
  .workspace-header {
    height: auto;
    min-height: 56px;
    padding: 0.5rem 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .header-center {
    order: 3;
    width: 100%;
    justify-content: space-between;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-subtle);
  }
  .message-row {
    max-width: 90%;
  }
}

@media (max-width: 680px) {
  .auth-card {
    padding: 1.5rem 1.25rem;
  }
  .roster-panel {
    position: absolute;
    right: 0;
    top: 56px;
    bottom: 0;
    z-index: 20;
    box-shadow: var(--shadow-lg);
    display: none;
  }
  .roster-panel.mobile-open {
    display: flex;
  }
  .chat-composer-container {
    padding: 0 0.75rem 0.75rem 0.75rem;
  }
  .messages-viewport {
    padding: 1rem 0.75rem;
  }
  .message-row {
    max-width: 95%;
  }
  .bucket-info {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
}

@media (max-width: 480px) {
  .auth-container {
    padding: 0.75rem;
  }
  .auth-card {
    padding: 1.25rem 1rem;
    gap: 1rem;
  }
  .bucket-name-display {
    font-size: var(--text-sm);
  }
  .btn-secondary {
    padding: 0 0.5rem;
  }
  .btn-secondary svg {
    display: none; /* Hide export icon on very small screens */
  }
}