/* ==========================================================================
   OCTAGON CHAT — DESIGN SYSTEM & TOKENS
   Strict implementation based on elayadesign/ai-design-skills specification
   ========================================================================== */

:root {
  /* Typography */
  --font-sans: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Geist Mono', monospace;

  /* Strict Dark Mode Palette (elayadesign approved values) */
  --bg-deep: #000000;
  --bg-surface: #181818;
  --bg-surface-elevated: #1F1F1F;
  --border-line: #272727;
  --bg-hover: #313131;
  --bg-tinted: #131209;

  /* Typography Colors */
  --text-primary: #EDEDED;
  --text-secondary: #A1A1A1;
  --text-muted: #707070;
  --text-dim: #4B4B4B;

  /* Single Considered Accent Color */
  --accent-color: #CCFF00;       /* Electric Acid (Octagon Brand) */
  --accent-rgb: 204, 255, 0;
  --accent-contrast: #000000;
  
  /* Status Colors */
  --color-crimson: #FF0055;
  --color-online: #00E599;

  /* Spacing Scale (strict tokens: 2, 4, 8, 12, 16, 24, 32, 40, 48, 64) */
  --space-25: 2px;
  --space-50: 4px;
  --space-75: 8px;
  --space-100: 12px;
  --space-200: 16px;
  --space-300: 24px;
  --space-400: 32px;
  --space-500: 40px;
  --space-600: 48px;
  --space-700: 64px;

  /* Radius Tokens (Tailwind Scale & Nested Formula) */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Base Animation Curve */
  --ease-base: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-hover: 300ms;
  --duration-layout: 500ms;
}

/* ==========================================================================
   RESET & CORE BASE
   ========================================================================== */

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

html, body {
  width: 100%;
  height: 100%;
  background-color: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

/* Text balance and wrap rules from skill */
h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  font-weight: 700;
  letter-spacing: -0.02em;
}

p, span, div {
  text-wrap: pretty;
}

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

button {
  cursor: pointer;
  user-select: none;
}

/* ==========================================================================
   APP VIEWPORT SHELL
   ========================================================================== */

.chat-viewport {
  display: flex;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background-color: var(--bg-deep);
  position: relative;
  overflow: hidden;
}

/* ==========================================================================
   1. LEFT SIDEBAR (CHANNELS & DMS)
   ========================================================================== */

.chat-sidebar {
  width: 290px;
  min-width: 290px;
  max-width: 290px;
  height: 100%;
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-line);
  display: flex;
  flex-direction: column;
  z-index: 20;
  transition: transform var(--duration-layout) var(--ease-base);
}

.sidebar-header {
  height: 60px;
  min-height: 60px;
  padding: 0 var(--space-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-line);
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: var(--space-100);
}

.brand-logo-hex {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background-color: var(--accent-color);
  color: var(--accent-contrast);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

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

.brand-text-block {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.icon-tool-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: background-color var(--duration-hover) var(--ease-base), color var(--duration-hover) var(--ease-base);
}

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

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

/* Sidebar Search */
.sidebar-search-box {
  padding: var(--space-100) var(--space-200);
}

.search-input-wrap {
  display: flex;
  align-items: center;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 0 var(--space-100);
  height: 36px;
  transition: border-color var(--duration-hover) var(--ease-base);
}

.search-input-wrap:focus-within {
  border-color: var(--text-muted);
}

.search-icon {
  width: 15px;
  height: 15px;
  color: var(--text-muted);
  margin-right: var(--space-75);
  flex-shrink: 0;
}

.search-input-wrap input {
  flex: 1;
  font-size: 13px;
  color: var(--text-primary);
}

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

.kbd-shortcut {
  font-size: 10px;
  font-family: var(--font-mono);
  background-color: var(--border-line);
  color: var(--text-secondary);
  padding: 2px 5px;
  border-radius: var(--radius-xs);
  letter-spacing: 0.05em;
}

/* Sidebar Feed */
.sidebar-scrollable {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-75) var(--space-100);
  display: flex;
  flex-direction: column;
  gap: var(--space-200);
}

.sidebar-scrollable::-webkit-scrollbar {
  width: 4px;
}

.sidebar-scrollable::-webkit-scrollbar-thumb {
  background-color: var(--border-line);
  border-radius: var(--radius-full);
}

.nav-category {
  display: flex;
  flex-direction: column;
  gap: var(--space-50);
}

.category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-50) var(--space-75);
}

.category-title {
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.category-action-btn {
  font-size: 15px;
  color: var(--text-muted);
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xs);
  transition: color var(--duration-hover) var(--ease-base);
}

.category-action-btn:hover {
  color: var(--accent-color);
}

.count-badge {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* Channel List Items */
.channel-list, .dm-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-25);
}

.channel-item, .dm-item {
  display: flex;
  align-items: center;
  padding: var(--space-75) var(--space-100);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-secondary);
  transition: background-color var(--duration-hover) var(--ease-base), color var(--duration-hover) var(--ease-base);
  position: relative;
}

.channel-item:hover, .dm-item:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.channel-item.active {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
  border-left: 2px solid var(--accent-color);
}

.channel-prefix {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-muted);
  width: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--space-75);
  flex-shrink: 0;
}

.channel-prefix svg {
  width: 16px;
  height: 16px;
}

.channel-item.active .channel-prefix {
  color: var(--accent-color);
}

.channel-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.channel-name {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-primary);
  line-height: 1.3;
}

.channel-preview {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
}

.unread-pill {
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 700;
  background-color: var(--accent-color);
  color: var(--accent-contrast);
  padding: 1px 7px;
  border-radius: var(--radius-full);
  margin-left: var(--space-75);
}

.unread-pill.pill-subtle {
  background-color: var(--border-line);
  color: var(--text-secondary);
}

/* DM Items */
.avatar-wrap {
  position: relative;
  margin-right: var(--space-100);
  flex-shrink: 0;
}

.avatar-inner {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background-color: var(--border-line);
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-main {
  background-color: var(--accent-color);
  color: var(--accent-contrast);
}

.status-indicator {
  position: absolute;
  bottom: -2px;
  right: -2px;
  width: 9px;
  height: 9px;
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-surface);
}

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

.status-indicator.offline {
  background-color: var(--text-dim);
}

.timestamp-label {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-dim);
  margin-left: var(--space-50);
}

/* Sidebar User Footer */
.sidebar-user-footer {
  height: 64px;
  padding: 0 var(--space-200);
  border-top: 1px solid var(--border-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-surface);
}

.user-info-card {
  display: flex;
  align-items: center;
  cursor: pointer;
}

.user-titles {
  display: flex;
  flex-direction: column;
}

.user-display-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.user-role-badge {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--accent-color);
  letter-spacing: 0.06em;
}

.user-actions-tools {
  display: flex;
  align-items: center;
  gap: var(--space-50);
}

.tool-circle-btn {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: background-color var(--duration-hover) var(--ease-base), color var(--duration-hover) var(--ease-base);
}

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

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

.tool-circle-btn.active-mic {
  color: var(--color-crimson);
}

/* ==========================================================================
   2. MAIN CHAT STAGE (HEADER, FEED, COMPOSER)
   ========================================================================== */

.chat-stage {
  flex: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-deep);
  position: relative;
  overflow: hidden;
}

/* Stage Header */
.stage-header {
  height: 60px;
  min-height: 60px;
  padding: 0 var(--space-300);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-line);
  background-color: var(--bg-deep);
  z-index: 10;
}

.stage-header-left {
  display: flex;
  align-items: center;
  gap: var(--space-200);
  min-width: 0;
}

.mobile-menu-trigger {
  display: none;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.mobile-menu-trigger svg {
  width: 20px;
  height: 20px;
}

.active-channel-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.channel-heading-row {
  display: flex;
  align-items: center;
  gap: var(--space-75);
}

.active-hash {
  font-size: 18px;
  font-weight: 600;
  color: var(--accent-color);
}

.active-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.live-status-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-50);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-line);
  padding: 2px 7px;
  border-radius: var(--radius-full);
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.pulse-indicator {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-online);
  box-shadow: 0 0 8px var(--color-online);
}

.active-topic-desc {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 580px;
}

/* Stage Actions */
.stage-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-100);
}

.stage-action-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-75);
  height: 34px;
  padding: 0 var(--space-100);
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-line);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  transition: border-color var(--duration-hover) var(--ease-base), background-color var(--duration-hover) var(--ease-base);
}

.stage-action-pill svg {
  width: 15px;
  height: 15px;
  color: var(--accent-color);
}

.stage-action-pill:hover {
  border-color: var(--accent-color);
  background-color: var(--bg-surface-elevated);
}

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

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

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

.stage-icon-btn.active {
  background-color: var(--bg-surface-elevated);
  border-color: var(--border-line);
  color: var(--accent-color);
}

/* Pinned Message Banner */
.pinned-message-strip {
  display: flex;
  align-items: center;
  padding: var(--space-100) var(--space-300);
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-line);
  font-size: 13px;
  gap: var(--space-100);
  transition: opacity var(--duration-hover) var(--ease-base);
}

.pinned-message-strip.hidden {
  display: none;
}

.pin-icon-wrap {
  color: var(--accent-color);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

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

.pin-content-text {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-secondary);
}

.pin-author {
  font-weight: 700;
  color: var(--text-primary);
  margin-right: var(--space-50);
}

.pin-action-buttons {
  display: flex;
  align-items: center;
  gap: var(--space-100);
}

.btn-jump-pin {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-color);
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  background-color: rgba(var(--accent-rgb), 0.1);
  transition: background-color var(--duration-hover) var(--ease-base);
}

.btn-jump-pin:hover {
  background-color: rgba(var(--accent-rgb), 0.2);
}

.btn-close-pin {
  font-size: 13px;
  color: var(--text-muted);
  padding: 2px 6px;
}

.btn-close-pin:hover {
  color: var(--text-primary);
}

/* Messages Feed */
.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-300);
  display: flex;
  flex-direction: column;
  gap: var(--space-300);
}

.messages-container::-webkit-scrollbar {
  width: 6px;
}

.messages-container::-webkit-scrollbar-thumb {
  background-color: var(--border-line);
  border-radius: var(--radius-full);
}

/* Feed Date Divider */
.feed-date-divider {
  display: flex;
  align-items: center;
  gap: var(--space-200);
  margin: var(--space-100) 0;
}

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

.divider-bubble {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Message Card (Nested Radius & Tokens) */
.message-card {
  display: flex;
  gap: var(--space-200);
  padding: var(--space-100) var(--space-200);
  border-radius: var(--radius-xl);
  position: relative;
  transition: background-color var(--duration-hover) var(--ease-base);
}

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

.message-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-75);
}

.message-meta-row {
  display: flex;
  align-items: center;
  gap: var(--space-100);
}

.author-username {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

.role-tag {
  font-size: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 1px 6px;
  border-radius: var(--radius-xs);
}

.role-mc {
  background-color: rgba(var(--accent-rgb), 0.15);
  color: var(--accent-color);
  border: 1px solid rgba(var(--accent-rgb), 0.3);
}

.role-judge {
  background-color: rgba(255, 0, 85, 0.15);
  color: var(--color-crimson);
  border: 1px solid rgba(255, 0, 85, 0.3);
}

.role-producer {
  background-color: var(--border-line);
  color: #00E5FF;
  border: 1px solid rgba(0, 229, 255, 0.3);
}

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

.message-text {
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.5;
  word-break: break-word;
}

/* Custom Audio Player Card (Strict Inner Radius = Outer Radius - Gap) */
/* Outer: rounded-xl (16px), gap: 12px -> inner: rounded-md (6-8px) */
.battle-audio-player {
  margin-top: var(--space-50);
  display: flex;
  align-items: center;
  gap: var(--space-200);
  padding: var(--space-100) var(--space-200);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-lg);
  max-width: 480px;
}

.player-toggle-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background-color: var(--accent-color);
  color: var(--accent-contrast);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--duration-hover) var(--ease-base);
}

.player-toggle-btn:hover {
  transform: scale(1.05);
}

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

.player-track-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-75);
}

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

.track-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 300px;
}

.track-duration {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.audio-waveform-bar {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 24px;
}

.wave-col {
  width: 3px;
  background-color: var(--border-line);
  border-radius: var(--radius-full);
  transition: height var(--duration-hover) var(--ease-base);
}

.wave-col.active {
  background-color: var(--accent-color);
}

/* Quote Preview Box */
.quote-preview-box {
  margin-top: var(--space-25);
  padding: var(--space-75) var(--space-100);
  background-color: var(--bg-surface-elevated);
  border-left: 2px solid var(--text-muted);
  border-radius: var(--radius-xs);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.quote-author {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-color);
}

.quote-text {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Reactions Row */
.message-reactions-row {
  display: flex;
  align-items: center;
  gap: var(--space-75);
  margin-top: var(--space-50);
}

.reaction-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-50);
  padding: 3px 8px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  font-size: 12px;
  transition: border-color var(--duration-hover) var(--ease-base), background-color var(--duration-hover) var(--ease-base);
}

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

.reaction-badge.active {
  background-color: rgba(var(--accent-rgb), 0.1);
  border-color: rgba(var(--accent-rgb), 0.3);
}

.reaction-count {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
}

.reaction-badge.active .reaction-count {
  color: var(--accent-color);
}

.add-reaction-btn {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-line);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: color var(--duration-hover) var(--ease-base);
}

.add-reaction-btn:hover {
  color: var(--text-primary);
}

/* Hover Context Actions */
.message-hover-menu {
  position: absolute;
  top: var(--space-100);
  right: var(--space-200);
  display: none;
  align-items: center;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 2px;
  gap: 2px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.message-card:hover .message-hover-menu {
  display: flex;
}

.menu-action-btn {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: background-color var(--duration-hover) var(--ease-base), color var(--duration-hover) var(--ease-base);
}

.menu-action-btn svg {
  width: 15px;
  height: 15px;
}

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

/* ==========================================================================
   COMPOSER (FLOATING INPUT)
   ========================================================================== */

.composer-container {
  padding: 0 var(--space-300) var(--space-200) var(--space-300);
  display: flex;
  flex-direction: column;
  gap: var(--space-75);
}

.composer-reply-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-75) var(--space-200);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-line);
  border-bottom: none;
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
  font-size: 12px;
}

.composer-reply-bar.hidden {
  display: none;
}

.reply-bar-left {
  display: flex;
  align-items: center;
  gap: var(--space-75);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.reply-bar-prefix {
  color: var(--text-muted);
}

.reply-target-author {
  font-weight: 700;
  color: var(--accent-color);
}

.reply-target-preview {
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-cancel-reply {
  color: var(--text-muted);
  padding: 2px 6px;
}

.btn-cancel-reply:hover {
  color: var(--text-primary);
}

.composer-box {
  display: flex;
  align-items: flex-end;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-lg);
  padding: var(--space-75) var(--space-100);
  gap: var(--space-100);
  transition: border-color var(--duration-hover) var(--ease-base);
}

.composer-box:focus-within {
  border-color: var(--text-muted);
}

.composer-left-tools, .composer-right-tools {
  display: flex;
  align-items: center;
  gap: var(--space-50);
}

.tool-btn {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: background-color var(--duration-hover) var(--ease-base), color var(--duration-hover) var(--ease-base);
}

.tool-btn svg {
  width: 18px;
  height: 18px;
}

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

.tool-btn.recording {
  color: var(--color-crimson);
  animation: pulseRecording 1s infinite alternate;
}

@keyframes pulseRecording {
  0% { transform: scale(1); }
  100% { transform: scale(1.15); }
}

.composer-input-wrapper {
  flex: 1;
  min-height: 36px;
  display: flex;
  align-items: center;
}

.composer-textarea {
  width: 100%;
  resize: none;
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.4;
  max-height: 120px;
}

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

.btn-send-message {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background-color: var(--accent-color);
  color: var(--accent-contrast);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--duration-hover) var(--ease-base), filter var(--duration-hover) var(--ease-base);
}

.btn-send-message:hover {
  transform: scale(1.05);
  filter: brightness(1.1);
}

.btn-send-message svg {
  width: 18px;
  height: 18px;
}

.composer-keyboard-hint {
  display: flex;
  justify-content: flex-end;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-dim);
}

.composer-keyboard-hint kbd {
  background-color: var(--bg-surface-elevated);
  padding: 1px 4px;
  border-radius: var(--radius-xs);
  color: var(--text-muted);
}

/* ==========================================================================
   3. RIGHT SIDEBAR (INFO & MEMBERS)
   ========================================================================== */

.chat-infobar {
  width: 290px;
  min-width: 290px;
  max-width: 290px;
  height: 100%;
  background-color: var(--bg-surface);
  border-left: 1px solid var(--border-line);
  display: flex;
  flex-direction: column;
  z-index: 15;
  transition: transform var(--duration-layout) var(--ease-base);
}

.chat-infobar.collapsed {
  display: none;
}

.infobar-header {
  height: 60px;
  min-height: 60px;
  padding: 0 var(--space-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-line);
}

.infobar-heading {
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.infobar-scrollable {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-200);
  display: flex;
  flex-direction: column;
  gap: var(--space-300);
}

.infobar-scrollable::-webkit-scrollbar {
  width: 4px;
}

.infobar-scrollable::-webkit-scrollbar-thumb {
  background-color: var(--border-line);
  border-radius: var(--radius-full);
}

.info-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-100);
}

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

.section-label {
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.meta-count {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-dim);
}

.info-card-flat {
  padding: var(--space-100);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-75);
}

.info-text {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.info-meta-item {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  font-family: var(--font-mono);
}

.meta-label {
  color: var(--text-dim);
}

.meta-val {
  color: var(--text-secondary);
}

.meta-val.highlight {
  color: var(--accent-color);
  font-weight: 600;
}

/* Media Tabs Row */
.media-tabs-row {
  display: flex;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 2px;
  gap: 2px;
}

.media-tab {
  flex: 1;
  font-size: 11px;
  font-weight: 600;
  padding: var(--space-50) 0;
  color: var(--text-muted);
  border-radius: var(--radius-xs);
  transition: background-color var(--duration-hover) var(--ease-base), color var(--duration-hover) var(--ease-base);
}

.media-tab.active {
  background-color: var(--border-line);
  color: var(--text-primary);
}

/* Shared Files */
.shared-files-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-50);
}

.file-item {
  display: flex;
  align-items: center;
  gap: var(--space-100);
  padding: var(--space-75);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
}

.file-icon-box {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-xs);
  background-color: var(--bg-hover);
  color: var(--accent-color);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.file-icon-box svg {
  width: 15px;
  height: 15px;
}

.file-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.file-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-sub {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* Member Groups */
.member-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-75);
  margin-top: var(--space-50);
}

.group-title {
  font-size: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-dim);
  letter-spacing: 0.06em;
}

.member-row {
  display: flex;
  align-items: center;
  padding: var(--space-50) var(--space-75);
  border-radius: var(--radius-md);
  transition: background-color var(--duration-hover) var(--ease-base);
}

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

.member-details {
  display: flex;
  flex-direction: column;
}

.member-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.role-chip {
  font-size: 9px;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-top: 2px;
}

.chip-judge {
  color: var(--color-crimson);
}

.chip-mc {
  color: var(--accent-color);
}

.chip-producer {
  color: #00E5FF;
}

/* ==========================================================================
   POPUPS & MODALS
   ========================================================================== */

/* Emoji Picker Popup */
.popup-emoji-picker {
  position: absolute;
  bottom: 80px;
  right: var(--space-300);
  width: 280px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.6);
  z-index: 50;
  display: flex;
  flex-direction: column;
  padding: var(--space-100);
  gap: var(--space-100);
}

.popup-emoji-picker.hidden {
  display: none;
}

.picker-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.picker-tabs {
  display: flex;
  gap: var(--space-50);
}

.picker-tab {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
}

.picker-tab.active {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.picker-close {
  color: var(--text-muted);
  font-size: 13px;
  padding: 2px 4px;
}

.picker-search input {
  width: 100%;
  font-size: 12px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: var(--space-50) var(--space-75);
}

.picker-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-50);
  max-height: 180px;
  overflow-y: auto;
}

.emoji-cell {
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-50);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: transform var(--duration-hover) var(--ease-base);
}

.emoji-cell:hover {
  background-color: var(--bg-hover);
  transform: scale(1.2);
}

/* Modal Window */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-200);
}

.modal-backdrop.hidden {
  display: none;
}

.modal-window {
  width: 100%;
  max-width: 620px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.8);
}

.modal-head {
  padding: var(--space-200) var(--space-300);
  border-bottom: 1px solid var(--border-line);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-kicker {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--accent-color);
  letter-spacing: 0.08em;
}

.modal-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close-btn {
  font-size: 16px;
  color: var(--text-muted);
  padding: 4px;
}

.modal-close-btn:hover {
  color: var(--text-primary);
}

.modal-body-split {
  display: flex;
  min-height: 320px;
}

.modal-nav {
  width: 160px;
  border-right: 1px solid var(--border-line);
  padding: var(--space-100);
  display: flex;
  flex-direction: column;
  gap: var(--space-25);
  background-color: var(--bg-surface-elevated);
}

.modal-nav-item {
  text-align: left;
  padding: var(--space-75) var(--space-100);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: background-color var(--duration-hover) var(--ease-base), color var(--duration-hover) var(--ease-base);
}

.modal-nav-item:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.modal-nav-item.active {
  background-color: var(--border-line);
  color: var(--accent-color);
}

.modal-content {
  flex: 1;
  padding: var(--space-300);
  display: flex;
  flex-direction: column;
  gap: var(--space-300);
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-50);
}

.setting-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.setting-input, .setting-select {
  height: 38px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 0 var(--space-100);
  font-size: 13px;
  color: var(--text-primary);
}

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

.setting-toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-75) 0;
}

.toggle-text {
  font-size: 13px;
  color: var(--text-primary);
}

.custom-toggle {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-color);
  cursor: pointer;
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 992px) {
  .chat-infobar {
    display: none;
  }
}

@media (max-width: 768px) {
  .chat-sidebar {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    transform: translateX(-100%);
  }

  .chat-sidebar.open {
    transform: translateX(0);
  }

  .mobile-menu-trigger {
    display: flex;
  }

  .active-topic-desc {
    display: none;
  }

  .stage-action-pill .pill-label {
    display: none;
  }
}