/* =========================================================
   Chat Design System - Solid Color Theme (Light & Dark Mode)
   Window Bar: Light Sky Blue (연하늘색)
   ========================================================= */

:root {
  /* Window Bar: Light Sky Blue (연하늘색) */
  --win-bar-bg: #82b4ea;
  --win-bar-border: #6ea4dc;
  --win-bar-text: #08213e;
  --win-btn-hover: rgba(0, 0, 0, 0.09);
  --win-btn-close-hover: #dc2626;

  /* Common Accents */
  --accent-primary: #2563eb;
  --accent-primary-hover: #1d4ed8;
  --accent-primary-active: #1e40af;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --accent-amber: #f59e0b;

  /* Typography & Layout */
  --font-sans: 'Pretendard', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Consolas', 'Menlo', 'Monaco', 'Courier New', monospace;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  --transition-fast: all 0.15s ease;
  --app-height: 100dvh;
}

/* ---------------------------------------------------------
   1. Light Mode (일반 모드)
   --------------------------------------------------------- */
:root, [data-theme="light"] {
  --bg-frame: #e2e8f0;
  --bg-main: #ffffff;
  --bg-sidebar: #f8fafc;
  --bg-sidebar-header: #f1f5f9;
  --bg-header: #ffffff;
  --bg-input-bar: #ffffff;
  --bg-input: #f8fafc;
  --bg-card: #f1f5f9;
  --bg-card-hover: #e2e8f0;

  --border-main: #e2e8f0;
  --border-light: #cbd5e1;
  --border-focus: #2563eb;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-nick: #2563eb;

  --bubble-me: #2563eb;
  --bubble-me-border: #1d4ed8;
  --bubble-me-text: #ffffff;
  --bubble-other: #f1f5f9;
  --bubble-other-border: #e2e8f0;
  --bubble-other-text: #0f172a;

  --media-bg: #f8fafc;
  --drawer-bg: #f8fafc;
  --drawer-header-bg: #f1f5f9;
  --modal-overlay: rgba(15, 23, 42, 0.45);
  --modal-bg: #ffffff;
  --welcome-box-bg: #f1f5f9;
  --welcome-box-border: #e2e8f0;
  --system-badge-bg: #f1f5f9;
  --system-badge-border: #e2e8f0;
  --system-badge-text: #475569;
}

/* ---------------------------------------------------------
   2. Dark Mode (다크 모드)
   --------------------------------------------------------- */
[data-theme="dark"] {
  --bg-frame: #101318;
  --bg-main: #14171e;
  --bg-sidebar: #1a1e27;
  --bg-sidebar-header: #161921;
  --bg-header: #1c202a;
  --bg-input-bar: #1a1e27;
  --bg-input: #101217;
  --bg-card: #202532;
  --bg-card-hover: #262c3b;

  --border-main: #2a3142;
  --border-light: #363f54;
  --border-focus: #3b82f6;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-nick: #60a5fa;

  --bubble-me: #2563eb;
  --bubble-me-border: #1d4ed8;
  --bubble-me-text: #ffffff;
  --bubble-other: #222734;
  --bubble-other-border: #2e3648;
  --bubble-other-text: #f1f5f9;

  --media-bg: #181c25;
  --drawer-bg: #1a1e27;
  --drawer-header-bg: #161921;
  --modal-overlay: rgba(8, 10, 15, 0.85);
  --modal-bg: #1a1e27;
  --welcome-box-bg: #12151c;
  --welcome-box-border: #2a3142;
  --system-badge-bg: #171b24;
  --system-badge-border: #2a3142;
  --system-badge-text: #38bdf8;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

html, body {
  width: 100%;
  height: 100%;
  height: 100dvh;
  height: var(--app-height, 100dvh);
  margin: 0;
  padding: 0;
  overflow: hidden;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  font-family: var(--font-sans);
  background-color: var(--bg-frame);
  color: var(--text-primary);
}

/* Flat Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
  background: var(--border-light);
  border-radius: var(--radius-xs);
  border: 2px solid var(--bg-main);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* =========================================================
   Light Sky Blue Window Bar (연하늘색 윈도우바)
   ========================================================= */
.window-bar {
  height: 38px;
  background-color: var(--win-bar-bg);
  border-bottom: 1px solid var(--win-bar-border);
  color: var(--win-bar-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 0 0 14px;
  user-select: none;
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.win-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.win-icon {
  display: none !important;
}

.win-title {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--win-bar-text);
  letter-spacing: -0.2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.win-server-status {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: #0b2545;
  background: rgba(255, 255, 255, 0.45);
  padding: 2px 10px;
  border-radius: var(--radius-xs);
  border: 1px solid rgba(255, 255, 255, 0.6);
  display: none;
}

@media (min-width: 680px) {
  .win-server-status {
    display: inline-block;
  }
}

.win-controls {
  display: flex;
  align-items: center;
  height: 100%;
}

.win-btn {
  width: 44px;
  height: 38px;
  border: none;
  background: transparent;
  color: var(--win-bar-text);
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.win-btn:hover {
  background: var(--win-btn-hover);
}

.win-btn.win-theme-btn {
  font-size: 14px;
  width: 40px;
}

.win-btn.win-close:hover {
  background: var(--win-btn-close-hover);
  color: #ffffff;
}

/* =========================================================
   Application Frame & Layout
   ========================================================= */
.window-app-frame {
  width: 100%;
  height: 100%;
  height: 100dvh;
  height: var(--app-height, 100dvh);
  max-height: 100dvh;
  max-height: var(--app-height, 100dvh);
  display: flex;
  flex-direction: column;
  background-color: var(--bg-main);
  overflow: hidden;
}

.app-layout {
  flex: 1 1 0;
  min-height: 0;
  height: 100%;
  display: flex;
  width: 100%;
  position: relative;
  overflow: hidden;
  background-color: var(--bg-main);
}

/* =========================================================
   Sidebar (Channels & Users)
   ========================================================= */
.sidebar {
  width: 260px;
  flex-shrink: 0;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-main);
  display: flex;
  flex-direction: column;
  z-index: 10;
  transition: width 0.22s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
  overflow: hidden;
}

.sidebar.collapsed {
  width: 0 !important;
  min-width: 0 !important;
  border-right: none;
  opacity: 0;
  pointer-events: none;
}

.sidebar-header {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-main);
  background-color: var(--bg-sidebar-header);
}

.user-profile-widget {
  display: flex;
  align-items: center;
  gap: 10px;
}

.avatar-badge-wrap {
  display: none !important;
}

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

.user-name-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.user-nickname {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  max-width: 110px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-status-tag {
  font-size: 10px;
  font-weight: 700;
  background-color: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  padding: 1px 5px;
  border-radius: var(--radius-xs);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.user-id-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

.icon-btn {
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  padding: 6px 8px;
  border-radius: var(--radius-xs);
  color: var(--text-secondary);
  font-size: 15px;
  transition: var(--transition-fast);
}

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

/* Nav Tabs (Channels vs DMs) */
.nav-tabs {
  display: flex;
  padding: 8px 12px;
  gap: 6px;
  background-color: var(--bg-sidebar-header);
  border-bottom: 1px solid var(--border-main);
}

.nav-tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 10px;
  border-radius: var(--radius-xs);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

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

.nav-tab.active {
  color: var(--text-primary);
  background-color: var(--bg-card);
  border: 1px solid var(--border-main);
  border-bottom-color: var(--accent-primary);
}

.unread-pill {
  background-color: var(--accent-rose);
  color: #ffffff;
  font-size: 10px;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: var(--radius-xs);
}

/* Nav Section Container */
.nav-section-container {
  flex: 1;
  overflow-y: auto;
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.section-title-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 8px 8px 8px;
}

.section-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.channel-count {
  font-size: 10.5px;
  font-family: var(--font-mono);
  background-color: var(--bg-card);
  color: var(--text-secondary);
  padding: 1px 6px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-main);
}

/* Channel & User List Items */
.channel-item, .user-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: var(--transition-fast);
  border: 1px solid transparent;
  border-left: 3px solid transparent;
}

.channel-item:hover, .user-item:hover {
  background-color: var(--bg-card-hover);
}

.channel-item.active, .user-item.active {
  background-color: var(--bg-card);
  border-color: var(--border-main);
  border-left: 3px solid var(--win-bar-bg);
}

.channel-item.active .channel-name, .user-item.active .user-name {
  color: var(--text-primary);
  font-weight: 700;
}

.channel-icon {
  display: none !important;
}

.channel-details, .user-details {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.channel-name, .user-name {
  font-size: 13.5px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 500;
}

.channel-desc, .user-status-text {
  font-size: 11.5px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-avatar-small {
  display: none !important;
}

.user-status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  vertical-align: middle;
  margin-right: 4px;
}

.user-status-dot.bot-dot {
  background-color: #a855f7;
}

.user-item-badge {
  background-color: var(--accent-rose);
  color: #ffffff;
  font-size: 10px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: var(--radius-xs);
}

/* =========================================================
   Main Chat Work Area
   ========================================================= */
.chat-main {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  background-color: var(--bg-main);
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  overscroll-behavior: none;
}

/* Chat Header */
.chat-header {
  height: 56px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-main);
  background-color: var(--bg-header);
  z-index: 5;
  flex-shrink: 0;
  gap: 12px;
}

.chat-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.room-info {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.room-icon-badge {
  display: none !important;
}

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

.room-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.room-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.room-type-tag {
  font-size: 10px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: var(--radius-xs);
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--accent-primary);
  border: 1px solid rgba(37, 99, 235, 0.25);
}

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

.chat-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.icon-btn-text {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  color: var(--text-secondary);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

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

.media-count-badge {
  background-color: var(--accent-primary);
  color: #ffffff;
  font-size: 10.5px;
  padding: 1px 5px;
  border-radius: var(--radius-xs);
  font-weight: 700;
  font-family: var(--font-mono);
}

#mobileMenuBtn {
  display: none;
}

/* =========================================================
   Messages Container (Optimized Layout & Auto-scroll)
   ========================================================= */
.messages-container {
  flex: 1 1 0;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  padding: 16px 20px 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background-color: var(--bg-main);
  min-height: 0;
  overflow-anchor: none;
  scroll-behavior: auto !important;
  -webkit-overflow-scrolling: touch;
}

/* Date Divider */
.date-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 6px 0;
  position: relative;
  flex-shrink: 0;
}

.date-divider::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--border-main);
}

.date-divider span {
  background-color: var(--bg-card);
  border: 1px solid var(--border-main);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: var(--radius-xs);
  position: relative;
  z-index: 1;
}

/* System Message */
.system-message-row {
  display: flex;
  justify-content: center;
  margin: 4px 0;
  flex-shrink: 0;
}

.system-message-badge {
  background-color: var(--system-badge-bg);
  border: 1px solid var(--system-badge-border);
  color: var(--system-badge-text);
  font-size: 12px;
  font-family: var(--font-sans);
  padding: 4px 14px;
  border-radius: var(--radius-xs);
}

/* IRC WHOIS Message Box (Light & Dark Theme Compatible) */
.whois-message-row {
  display: flex;
  justify-content: flex-start;
  margin: 6px 0;
  max-width: 100%;
  flex-shrink: 0;
}

.whois-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-main);
  border-left: 4px solid var(--accent-primary);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  white-space: pre;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  overflow-x: auto;
  max-width: 95%;
}

[data-theme="dark"] .whois-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-main);
  border-left: 4px solid var(--text-nick);
  color: var(--text-primary);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
}

/* Message Item (Zero-lag real dimensions for pixel-perfect scrolling) */
.message-row {
  display: flex;
  gap: 8px;
  max-width: 85%;
  flex-shrink: 0;
}

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

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

.msg-sender-avatar {
  display: none !important;
}

.msg-content-box {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.message-row.me .msg-content-box {
  align-items: flex-end;
}

.msg-info-line {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
}

.message-row.me .msg-info-line {
  flex-direction: row-reverse;
}

.msg-author {
  font-weight: 700;
  color: var(--text-nick);
}

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

/* Message Bubble (Solid Colors) */
.msg-bubble {
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.5;
  word-break: break-word;
  position: relative;
}

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

.message-row.me .msg-bubble {
  background-color: var(--bubble-me);
  border: 1px solid var(--bubble-me-border);
  color: var(--bubble-me-text);
  border-top-right-radius: 2px;
}

/* =========================================================
   Multimedia Renders (Solid, Clean)
   ========================================================= */
/* 1. Image Thumbnail */
.media-image-container {
  max-width: 360px;
  border-radius: var(--radius-xs);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  border: 1px solid var(--border-main);
  background-color: #000000;
  transition: var(--transition-fast);
}

.media-image-container:hover {
  border-color: var(--border-focus);
}

.media-image-container img {
  display: block;
  width: 100%;
  max-height: 300px;
  object-fit: cover;
}

.media-image-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition-fast);
}

.media-image-container:hover .media-image-overlay {
  opacity: 1;
}

.overlay-zoom-icon {
  background-color: var(--bg-card);
  border: 1px solid var(--border-main);
  padding: 6px 12px;
  border-radius: var(--radius-xs);
  color: #ffffff;
  font-size: 12px;
  font-weight: 600;
}

/* 2. Video Player */
.media-video-container {
  max-width: 400px;
  border-radius: var(--radius-xs);
  overflow: hidden;
  border: 1px solid var(--border-main);
  background-color: #000000;
}

.media-video-container video {
  width: 100%;
  max-height: 300px;
  display: block;
  outline: none;
}

/* 3. File Attachment Card */
.media-file-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background-color: var(--media-bg);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  min-width: 240px;
  max-width: 340px;
  transition: var(--transition-fast);
}

.message-row.me .media-file-card {
  background-color: rgba(0, 0, 0, 0.2);
  border-color: rgba(255, 255, 255, 0.2);
}

.file-card-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-xs);
  background-color: var(--bg-card);
  border: 1px solid var(--border-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.file-card-details {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.file-card-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.file-download-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-xs);
  background-color: var(--accent-primary);
  color: #ffffff;
  text-decoration: none;
  transition: var(--transition-fast);
}

.file-download-btn:hover {
  background-color: var(--accent-primary-hover);
}

.media-caption {
  margin-top: 6px;
  font-size: 13.5px;
}

/* Typing Indicator Floating Bar (Zero Layout Shift) */
.typing-indicator-bar {
  position: absolute;
  bottom: 66px;
  left: 20px;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  font-size: 11.5px;
  color: var(--text-secondary);
  background-color: var(--bg-card);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.typing-indicator-bar.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.typing-dots {
  display: flex;
  gap: 3px;
}

.typing-dots span {
  width: 5px;
  height: 5px;
  background-color: var(--accent-primary);
  border-radius: 50%;
  opacity: 0.8;
}

/* Attachment Preview Bar */
.attachment-preview-bar {
  padding: 8px 20px;
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-main);
}

.attachment-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background-color: var(--bg-main);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
}

.file-icon-preview {
  font-size: 16px;
}

.file-chip-info {
  display: flex;
  flex-direction: column;
}

.file-chip-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  max-width: 200px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-chip-size {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-muted);
}

.chip-remove-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  font-size: 13px;
  transition: var(--transition-fast);
}

.chip-remove-btn:hover {
  color: var(--accent-rose);
}

.upload-progress-bar {
  height: 3px;
  background-color: var(--border-main);
  border-radius: var(--radius-xs);
  margin-top: 6px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background-color: var(--accent-primary);
  transition: width 0.1s linear;
}

/* Drag and Drop Overlay */
.drag-drop-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(14, 17, 24, 0.9);
  border: 2px dashed var(--win-bar-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}

.drag-drop-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.drag-drop-content {
  text-align: center;
}

.drag-icon {
  font-size: 48px;
  margin-bottom: 8px;
}

.drag-drop-content h3 {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
}

.drag-drop-content p {
  font-size: 13px;
  color: #cbd5e1;
}

/* =========================================================
   Message Input Bar Form (Solid Flat)
   ========================================================= */
.chat-input-form {
  padding: 12px 20px;
  padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
  background-color: var(--bg-input-bar);
  border-top: 1px solid var(--border-main);
  display: flex;
  align-items: flex-end;
  gap: 8px;
  flex-shrink: 0;
  z-index: 15;
}

.attach-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-xs);
  background-color: var(--bg-card);
  border: 1px solid var(--border-main);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.attach-btn:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-light);
}

.input-wrapper {
  flex: 1;
  background-color: var(--bg-input);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  padding: 8px 12px;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
}

.input-wrapper:focus-within {
  border-color: var(--border-focus);
}

.chat-textarea {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  resize: none;
  max-height: 120px;
  line-height: 1.5;
}

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

.send-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-xs);
  background-color: var(--accent-primary);
  border: 1px solid var(--bubble-me-border);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

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

.send-btn:active {
  background-color: var(--accent-primary-active);
}

/* =========================================================
   Login / Setup Modal Dialog (단색 & 연하늘색 윈도우바)
   ========================================================= */
.modal-overlay, .modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: var(--modal-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.active, .modal-backdrop.active,
.modal-overlay[style*="display: flex"], .modal-backdrop[style*="display: flex"] {
  opacity: 1;
  pointer-events: auto;
}

.modal-card, .modal-window {
  background-color: var(--modal-bg);
  border: 1px solid var(--win-bar-border);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
  border-radius: 4px;
  width: 90%;
  max-width: 440px;
  overflow: hidden;
  animation: modalPop 0.2s cubic-bezier(0.1, 0.9, 0.2, 1);
}

.modal-card.modal-wide, .modal-window.modal-wide {
  max-width: 620px;
}

@keyframes modalPop {
  from { transform: scale(0.96) translateY(10px); opacity: 0; }
  to { transform: scale(1) translateY(0); opacity: 1; }
}

.modal-window-bar {
  border-top-left-radius: 3px;
  border-top-right-radius: 3px;
}

.modal-body-content {
  padding: 24px;
}

.welcome-box {
  background-color: var(--welcome-box-bg);
  border: 1px solid var(--welcome-box-border);
  border-radius: var(--radius-xs);
  padding: 12px 14px;
  margin-bottom: 20px;
  text-align: center;
}

.welcome-title {
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.welcome-sub {
  color: var(--text-muted);
  font-size: 11.5px;
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: left;
}

.form-label {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-secondary);
}

.input-with-avatar {
  display: flex;
  gap: 8px;
  align-items: center;
}

.avatar-select-btn {
  display: none !important;
}

.avatar-palette {
  display: none !important;
}

.avatar-opt {
  font-size: 22px;
  padding: 6px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  text-align: center;
  transition: var(--transition-fast);
}

.avatar-opt:hover {
  background-color: var(--bg-card-hover);
}

.custom-input {
  flex: 1;
  height: 44px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  padding: 0 14px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: var(--transition-fast);
}

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

.primary-btn {
  height: 44px;
  border-radius: var(--radius-xs);
  background-color: var(--accent-primary);
  border: 1px solid var(--bubble-me-border);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition-fast);
  margin-top: 4px;
}

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

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

/* =========================================================
   Terms of Service & Legal Policies (이용약관 / 개인정보 / 청소년)
   ========================================================= */
.legal-agree-section {
  background-color: var(--bg-card);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.legal-agree-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-main);
  padding-bottom: 8px;
}

.legal-agree-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-primary);
}

.agree-all-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-primary);
  cursor: pointer;
  user-select: none;
}

.legal-checkbox-list {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.legal-checkbox-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.custom-checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.custom-checkbox-label input[type="checkbox"],
.agree-all-label input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--accent-primary);
  cursor: pointer;
  margin: 0;
}

.req-tag {
  color: var(--accent-primary);
  font-weight: 700;
}

.legal-link-btn {
  background: transparent;
  border: none;
  font-size: 11px;
  color: var(--text-muted);
  text-decoration: underline;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: var(--radius-xs);
  transition: var(--transition-fast);
  white-space: nowrap;
}

.legal-link-btn:hover {
  color: var(--accent-primary);
  background-color: var(--bg-card-hover);
}

.legal-warning-notice {
  font-size: 11px;
  line-height: 1.45;
  color: #b45309;
  background-color: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: var(--radius-xs);
  padding: 7px 10px;
}

[data-theme="dark"] .legal-warning-notice {
  color: #fbbf24;
  background-color: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.35);
}

/* Legal Viewer Modal Dialog */
.legal-modal-tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border-main);
  margin-bottom: 12px;
}

.legal-tab-btn {
  padding: 8px 14px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.legal-tab-btn:hover {
  color: var(--text-primary);
}

.legal-tab-btn.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
  font-weight: 700;
}

.legal-modal-body {
  max-height: 380px;
  overflow-y: auto;
  padding: 14px 16px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-primary);
}

.legal-modal-body .legal-plain-text {
  font-family: inherit;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.65;
  font-size: 13px;
  color: var(--text-primary);
  margin: 0;
  padding: 0;
  background: transparent;
  border: none;
}

.legal-modal-body h1 {
  font-size: 16px;
  font-weight: 800;
  margin-top: 0;
  margin-bottom: 6px;
}

.legal-modal-body .legal-date {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.legal-modal-body h2 {
  font-size: 13.5px;
  font-weight: 700;
  margin-top: 18px;
  margin-bottom: 6px;
}

.legal-modal-body p, .legal-modal-body li {
  font-size: 12.5px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.legal-modal-body ul {
  padding-left: 18px;
  margin-bottom: 10px;
}

.legal-modal-body .highlight-box {
  padding: 10px 12px;
  margin: 12px 0;
  font-size: 12px;
  border-radius: var(--radius-xs);
  background-color: var(--bg-card);
  border-left: 3px solid var(--accent-primary);
  color: var(--text-primary);
}

.legal-modal-body .footer-note {
  margin-top: 20px;
  padding-top: 10px;
  border-top: 1px solid var(--border-main);
  font-size: 11.5px;
  color: var(--text-muted);
}

.legal-loading, .legal-error {
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

/* =========================================================
   Right Drawer (Media & Files Gallery)
   ========================================================= */
.media-drawer {
  width: 300px;
  background-color: var(--drawer-bg);
  border-left: 1px solid var(--border-main);
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 0;
  bottom: 0;
  right: -300px;
  z-index: 15;
  transition: right 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.media-drawer.open {
  right: 0;
}

.drawer-header {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-main);
  background-color: var(--drawer-header-bg);
}

.drawer-header h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

.drawer-tabs {
  display: flex;
  padding: 8px 10px;
  gap: 4px;
  border-bottom: 1px solid var(--border-main);
  background-color: var(--drawer-header-bg);
}

.drawer-tab {
  flex: 1;
  padding: 6px 2px;
  font-size: 11.5px;
  font-weight: 600;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: var(--transition-fast);
}

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

.drawer-tab.active {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-main);
}

.drawer-content {
  flex: 1;
  overflow-y: auto;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.drawer-empty-state {
  margin: auto;
  text-align: center;
  color: var(--text-muted);
}

.drawer-empty-state span {
  font-size: 32px;
  display: block;
  margin-bottom: 6px;
}

.drawer-empty-state p {
  font-size: 12.5px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}

.gallery-item-thumb {
  aspect-ratio: 1;
  border-radius: var(--radius-xs);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  background-color: var(--bg-card);
  border: 1px solid var(--border-main);
}

.gallery-item-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-file-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background-color: var(--bg-card);
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-main);
}

.gallery-file-name {
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  color: var(--text-primary);
}

/* =========================================================
   Lightbox Modal
   ========================================================= */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeInModal 0.15s ease;
}

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

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(4, 7, 12, 0.94);
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  z-index: 2;
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  overflow: hidden;
  background-color: var(--bg-main);
}

.lightbox-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background-color: var(--win-bar-bg);
  color: var(--win-bar-text);
  border-bottom: 1px solid var(--win-bar-border);
}

.lightbox-filename {
  font-size: 13px;
  font-weight: 700;
  color: var(--win-bar-text);
  max-width: 50vw;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lightbox-btns {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lightbox-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  background-color: #0b2545;
  color: #ffffff;
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-fast);
}

.lightbox-btn:hover {
  background-color: #061528;
}

.lightbox-btn-icon {
  background: transparent;
  border: none;
  color: var(--win-bar-text);
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  padding: 4px 8px;
  transition: var(--transition-fast);
}

.lightbox-btn-icon:hover {
  background-color: var(--win-btn-close-hover);
  color: #ffffff;
}

.lightbox-image-wrap {
  overflow: hidden;
  background-color: #000000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-image-wrap img {
  max-width: 85vw;
  max-height: 80vh;
  object-fit: contain;
  display: block;
}


/* =========================================================
   Channel & Slash Commands (Topic Bar, Action Msg, Help Modal)
   ========================================================= */
.btn-create-channel-mini {
  background-color: var(--accent-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-xs);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-create-channel-mini:hover {
  background-color: var(--accent-primary-hover);
}

.section-title-left {
  display: flex;
  align-items: center;
  gap: 6px;
}

.room-topic-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
}

.topic-tag {
  font-size: 10px;
  font-weight: 700;
  background: transparent;
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  padding: 1px 6px;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
}

.op-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #ea580c;
  background: rgba(234, 88, 12, 0.12);
  border: 1px solid rgba(234, 88, 12, 0.35);
  padding: 0 4px;
  border-radius: var(--radius-xs);
  font-size: 10.5px;
  margin-right: 4px;
  line-height: 1.3;
  user-select: none;
}

[data-theme="dark"] .op-badge {
  color: #fb923c;
  background: rgba(251, 146, 60, 0.15);
  border-color: rgba(251, 146, 60, 0.35);
}

.oper-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  margin-right: 4px;
  line-height: 1.3;
  user-select: none;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.2));
}

.topic-edit-btn {
  background: transparent;
  border: none;
  font-size: 11px;
  cursor: pointer;
  padding: 1px 4px;
  opacity: 0.6;
  transition: opacity 0.15s ease;
}

.topic-edit-btn:hover {
  opacity: 1;
}

/* Action Message (/me ...) */
.message-row.action-message-row {
  max-width: 100%;
  align-self: flex-start;
  padding: 2px 8px;
}

.action-message-content {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-style: italic;
  font-size: 13.5px;
  color: #a855f7;
  background: rgba(168, 85, 247, 0.08);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  border-left: 3px solid #a855f7;
}

.action-symbol {
  font-weight: 800;
  color: #c084fc;
}

.action-author {
  font-weight: 700;
  color: var(--text-primary);
}

.action-text {
  color: var(--text-primary);
}

.action-time {
  font-size: 10px;
  opacity: 0.7;
  margin-left: 4px;
}

/* Help Modal Table */
.help-section {
  margin-bottom: 16px;
}

.help-section h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.help-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
  margin-bottom: 12px;
}

.help-table th, .help-table td {
  border: 1px solid var(--border-main);
  padding: 6px 10px;
  text-align: left;
}

.help-table th {
  background-color: var(--bg-card);
  color: var(--text-secondary);
  font-weight: 700;
}

.help-table code {
  background-color: var(--bg-input);
  color: var(--accent-primary);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-weight: 700;
}

.help-notice-box {
  background-color: var(--welcome-box-bg);
  border: 1px solid var(--welcome-box-border);
  border-radius: var(--radius-xs);
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* =========================================================
   Bot & Channel Occupancy Badges
   ========================================================= */
.channel-header-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
}

.channel-meta-badges {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.channel-bot-tag {
  font-size: 9.5px;
  font-weight: 700;
  color: #7c3aed;
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.3);
  border-radius: var(--radius-xs);
  padding: 0 4px;
  line-height: 1.3;
  white-space: nowrap;
}

[data-theme="dark"] .channel-bot-tag {
  color: #c4b5fd;
  background: rgba(167, 139, 250, 0.15);
  border-color: rgba(167, 139, 250, 0.35);
}

.channel-user-count {
  font-size: 9.5px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  padding: 0 4px;
  line-height: 1.3;
  white-space: nowrap;
}

.bot-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  color: #7c3aed;
  background: rgba(124, 58, 237, 0.12);
  border: 1px solid rgba(124, 58, 237, 0.35);
  border-radius: var(--radius-xs);
  padding: 0 4px;
  margin-right: 4px;
  line-height: 1.3;
  user-select: none;
}

[data-theme="dark"] .bot-badge {
  color: #c4b5fd;
  background: rgba(196, 181, 253, 0.2);
  border-color: rgba(196, 181, 253, 0.4);
}

.user-online-dot.bot-online {
  background-color: #a855f7;
  box-shadow: 0 0 0 1px var(--bg-sidebar), 0 0 5px #a855f7;
}

/* =========================================================
   Sidebar Toggle & Collapse Controls (Left & Right)
   ========================================================= */
.sidebar-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  user-select: none;
  flex-shrink: 0;
  height: 32px;
}

.sidebar-toggle-btn:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-light);
}

.sidebar-toggle-btn.active {
  background-color: var(--bg-main);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.2);
}

.sidebar-collapse-icon-btn {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-xs);
  background-color: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  cursor: pointer;
  transition: var(--transition-fast);
  padding: 0;
}

.sidebar-collapse-icon-btn:hover {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-main);
}

.header-count-pill {
  background-color: var(--bg-card);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 1px 5px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-main);
  line-height: 1.2;
}

.sidebar-toggle-btn.active .header-count-pill {
  background-color: rgba(37, 99, 235, 0.12);
  color: var(--accent-primary);
  border-color: rgba(37, 99, 235, 0.35);
}

/* =========================================================
   Right Sidebar: Online Nicklist
   ========================================================= */
.right-sidebar {
  width: 240px;
  flex-shrink: 0;
  background-color: var(--bg-sidebar);
  border-left: 1px solid var(--border-main);
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  transition: width 0.22s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
  overflow: hidden;
  z-index: 8;
}

.right-sidebar.collapsed {
  width: 0 !important;
  min-width: 0 !important;
  border-left: none;
  opacity: 0;
  pointer-events: none;
}

.right-sidebar-header {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-main);
  background-color: var(--bg-sidebar-header);
  flex-shrink: 0;
}

.right-sidebar-body {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px 8px;
}

.right-sidebar-footer {
  padding: 8px 12px;
  border-top: 1px solid var(--border-main);
  background-color: var(--bg-sidebar-header);
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
  flex-shrink: 0;
}

.user-item.user-item-me {
  background-color: rgba(37, 99, 235, 0.05);
  border: 1px dashed var(--border-light);
  margin-bottom: 6px;
  cursor: default !important;
}

.user-item.user-item-me:hover {
  background-color: rgba(37, 99, 235, 0.08) !important;
}

.me-tag {
  font-size: 10px;
  font-weight: 700;
  color: var(--accent-primary);
  background: rgba(37, 99, 235, 0.12);
  padding: 1px 4px;
  border-radius: var(--radius-xs);
  margin-left: 4px;
}

/* =========================================================
   Responsive Design System for Tablet & Smartphone
   ========================================================= */

/* Mobile Backdrop for Sidebars */
.app-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(10, 15, 25, 0.55);
  backdrop-filter: blur(2px);
  z-index: 35;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.24s ease;
}

.app-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

/* Tablet & Mobile Breakpoints (<= 1024px) */
@media (max-width: 1024px) {
  .sidebar {
    position: absolute !important;
    top: 0;
    bottom: 0;
    left: 0;
    width: 280px !important;
    max-width: 84vw !important;
    height: 100% !important;
    z-index: 40 !important;
    transform: translateX(-100%);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s ease !important;
    box-shadow: none;
    border-right: 1px solid var(--border-main);
  }

  .sidebar.mobile-open {
    transform: translateX(0) !important;
    box-shadow: 6px 0 28px rgba(0, 0, 0, 0.4) !important;
    pointer-events: auto !important;
  }

  .sidebar.collapsed {
    width: 280px !important;
    opacity: 1 !important;
  }

  .sidebar:not(.mobile-open) {
    transform: translateX(-100%) !important;
    pointer-events: none !important;
  }

  .right-sidebar {
    position: absolute !important;
    top: 0;
    bottom: 0;
    right: 0;
    width: 260px !important;
    max-width: 84vw !important;
    height: 100% !important;
    z-index: 40 !important;
    transform: translateX(100%);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s ease !important;
    box-shadow: none;
    border-left: 1px solid var(--border-main);
  }

  .right-sidebar.mobile-open {
    transform: translateX(0) !important;
    box-shadow: -6px 0 28px rgba(0, 0, 0, 0.4) !important;
    pointer-events: auto !important;
  }

  .right-sidebar.collapsed {
    width: 260px !important;
    opacity: 1 !important;
  }

  .right-sidebar:not(.mobile-open) {
    transform: translateX(100%) !important;
    pointer-events: none !important;
  }

  .media-drawer {
    width: 100vw;
    max-width: 380px;
    right: -100vw;
    z-index: 45;
  }

  .sidebar-collapse-icon-btn {
    width: 28px;
    height: 28px;
    font-size: 13px;
    font-weight: bold;
    background-color: var(--bg-card);
    border: 1px solid var(--border-main);
    color: var(--text-primary);
  }
}

/* Smartphone Layout (<= 640px, e.g. Galaxy Note 20 Ultra) */
@media (max-width: 640px) {
  .window-bar {
    height: 36px;
    padding-left: 10px;
  }

  .win-title {
    font-size: 12.5px;
    max-width: calc(100vw - 80px);
  }

  /* Hide unnecessary desktop window buttons on phone */
  #winMinBtn, #winMaxBtn, #winCloseBtn,
  .win-min-dummy, .win-max-dummy, .win-close-dummy {
    display: none !important;
  }

  .chat-header {
    height: 48px;
    padding: 0 10px;
    gap: 6px;
  }

  .chat-header-left {
    gap: 6px;
    min-width: 0;
  }

  .room-title {
    font-size: 14.5px;
    max-width: 120px;
  }

  .room-type-tag {
    display: none;
  }

  .room-topic-row {
    display: none;
  }

  .chat-header-actions {
    gap: 4px;
  }

  .sidebar-toggle-btn {
    height: 32px;
    padding: 3px 8px;
    font-size: 11.5px;
    gap: 4px;
  }

  .icon-btn-text {
    height: 32px;
    padding: 3px 7px;
    font-size: 11.5px;
  }

  #mobileMenuBtn {
    display: none !important;
  }

  .messages-container {
    padding: 10px 12px 16px 12px;
    gap: 8px;
  }

  .message-row {
    max-width: 93%;
    gap: 6px;
  }

  .msg-bubble {
    padding: 8px 12px;
    font-size: 14px;
    line-height: 1.45;
  }

  /* Fixed & Safe bottom chat input form */
  .chat-input-form {
    padding: 8px 10px;
    padding-bottom: calc(8px + env(safe-area-inset-bottom, 0px));
    gap: 6px;
  }

  .attach-btn, .send-btn {
    width: 38px;
    height: 38px;
    flex-shrink: 0;
  }

  .input-wrapper {
    padding: 4px 10px;
    min-height: 38px;
  }

  .chat-textarea {
    font-size: 15px; /* Comfortable & prevents mobile zoom */
    line-height: 20px;
    padding: 4px 0;
    min-height: 28px;
    max-height: 100px;
  }

  .modal-card, .modal-window {
    width: 94%;
    max-width: 380px;
    max-height: calc(100dvh - 30px);
    overflow-y: auto;
  }

  .modal-body-content {
    padding: 16px 14px;
  }
}

/* =========================================================
   112 Reporting System & #법정 Court Cards
   ========================================================= */

/* Message Row Hover Action: Report Button */
.message-row {
  position: relative;
}

.msg-report-btn {
  display: none;
  position: absolute;
  top: 4px;
  right: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  padding: 2px 6px;
  font-size: 11px;
  cursor: pointer;
  color: var(--text-muted);
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  transition: var(--transition-fast);
  z-index: 5;
}

.message-row:hover .msg-report-btn {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.msg-report-btn:hover {
  background-color: #fee2e2;
  border-color: #ef4444;
  color: #b91c1c;
}

[data-theme="dark"] .msg-report-btn:hover {
  background-color: #450a0a;
  border-color: #ef4444;
  color: #fca5a5;
}

/* Report Modal Styling */
.report-room-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-primary);
  background-color: var(--bg-input);
  border: 1px solid var(--border-main);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  margin-bottom: 12px;
}

.report-message-picker {
  max-height: 180px;
  overflow-y: auto;
  border: 1px solid var(--border-main);
  background: var(--bg-input);
  border-radius: var(--radius-xs);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.report-msg-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 10px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: var(--transition-fast);
  border: 1px solid transparent;
}

.report-msg-item:hover {
  background-color: var(--bg-card-hover);
}

.report-msg-item.selected {
  background-color: rgba(239, 68, 68, 0.1);
  border-color: #ef4444;
}

.report-msg-item input[type="radio"] {
  margin-top: 3px;
  accent-color: #ef4444;
  cursor: pointer;
}

.report-msg-body {
  flex: 1;
  min-width: 0;
}

.report-msg-header {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.report-msg-author {
  font-weight: 700;
  color: var(--text-primary);
}

.report-msg-text {
  font-size: 12.5px;
  color: var(--text-secondary);
  word-break: break-word;
  white-space: pre-wrap;
}

.report-reasons-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

@media (max-width: 480px) {
  .report-reasons-grid {
    grid-template-columns: 1fr;
  }
}

.report-reason-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  padding: 6px 8px;
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  background: var(--bg-input);
  cursor: pointer;
  user-select: none;
}

.report-reason-item:hover {
  border-color: var(--accent-primary);
}

.report-reason-item input[type="radio"] {
  accent-color: var(--accent-primary);
  margin: 0;
}

.report-details-textarea {
  width: 100%;
  resize: vertical;
  min-height: 50px;
  font-size: 12.5px;
  box-sizing: border-box;
}

.report-caution-box {
  font-size: 11.5px;
  line-height: 1.5;
  color: #b45309;
  background-color: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: var(--radius-xs);
  padding: 8px 12px;
}

[data-theme="dark"] .report-caution-box {
  color: #fbbf24;
  background-color: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.35);
}

.danger-btn {
  background-color: #ef4444;
  color: #ffffff;
  border: none;
  border-radius: var(--radius-xs);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-fast);
}

.danger-btn:hover {
  background-color: #dc2626;
}

/* #법정 Court Case Card inside Messages Container */
.court-case-card {
  width: 100%;
  max-width: 680px;
  margin: 10px auto;
  background: var(--bg-card);
  border: 2px solid #8b5cf6;
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.12);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.court-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-main);
  padding-bottom: 8px;
}

.court-case-title {
  font-size: 14px;
  font-weight: 800;
  color: #8b5cf6;
  display: flex;
  align-items: center;
  gap: 6px;
}

.court-status-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
}

.court-status-badge.pending {
  background-color: rgba(245, 158, 11, 0.15);
  color: #b45309;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

[data-theme="dark"] .court-status-badge.pending {
  color: #fbbf24;
}

.court-status-badge.banned {
  background-color: rgba(239, 68, 68, 0.15);
  color: #dc2626;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.court-status-badge.dismissed {
  background-color: rgba(100, 116, 139, 0.15);
  color: var(--text-muted);
  border: 1px solid var(--border-main);
}

.court-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  font-size: 12px;
  background: var(--bg-input);
  padding: 8px 12px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-main);
}

@media (max-width: 500px) {
  .court-meta-grid {
    grid-template-columns: 1fr;
  }
}

.court-meta-item strong {
  color: var(--text-muted);
  margin-right: 4px;
}

/* Evidence Context Box */
.court-evidence-box {
  background: var(--bg-window);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.court-evidence-label {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

.court-evidence-msg {
  padding: 4px 8px;
  border-radius: var(--radius-xs);
  font-size: 12px;
  line-height: 1.4;
  border-left: 3px solid transparent;
}

.court-evidence-msg.target {
  background-color: rgba(239, 68, 68, 0.12);
  border-left-color: #ef4444;
  font-weight: 600;
}

.court-evidence-time {
  font-size: 10.5px;
  color: var(--text-muted);
  margin-right: 6px;
}

.court-evidence-author {
  font-weight: 700;
  margin-right: 4px;
}

.court-btn-row {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 4px;
}

.court-btn-ban {
  background-color: #ef4444;
  color: #ffffff;
  border: none;
  border-radius: var(--radius-xs);
  font-size: 12px;
  font-weight: 700;
  padding: 6px 14px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.court-btn-ban:hover {
  background-color: #dc2626;
}

.court-btn-dismiss {
  background-color: var(--bg-input);
  color: var(--text-secondary);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-xs);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  cursor: pointer;
  transition: var(--transition-fast);
}

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

.court-verdict-box {
  font-size: 12px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: var(--radius-xs);
  background: var(--bg-input);
  border: 1px solid var(--border-main);
}

/* DM conversation item & close button */
.dm-conversation-item .dm-close-btn,
.channel-item .channel-close-btn {
  opacity: 0;
  transition: opacity 0.15s ease;
}
.dm-conversation-item:hover .dm-close-btn,
.channel-item:hover .channel-close-btn {
  opacity: 1;
}
.dm-close-btn:hover,
.channel-close-btn:hover {
  color: #dc2626 !important;
}

/* Server channel row */
.server-channel-row {
  transition: background-color 0.12s ease;
}
.server-channel-row:hover {
  background-color: var(--bg-card-hover);
}