:root,
[data-theme="dark"] {
  --bg-app: #1a1d21;
  --bg-sidebar: #19171d;
  --bg-sidebar-hover: #27242c;
  --bg-sidebar-active: #1164a3;
  --bg-header: #121016;
  --bg-surface: #222529;
  --bg-elevated: #2c2d30;
  --bg-msg-hover: #222529;
  --bg-deleted: rgba(224, 30, 90, 0.10);
  --border-deleted: #e01e5a;
  --bg-code: #121417;
  --text-primary: #d1d2d3;
  --text-secondary: #ababad;
  --text-muted: #868686;
  --text-bright: #ffffff;
  --border-color: #35373b;
  --accent-primary: #1d9bd1;
  --accent-green: #2bac76;
  --accent-danger: #e01e5a;
  --accent-warning: #ecb22e;
  --mention-bg: rgba(29, 155, 209, 0.2);
  --mention-text: #8ccff0;
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.45);
}

[data-theme="light"] {
  --bg-app: #ffffff;
  --bg-sidebar: #3f0e40;
  --bg-sidebar-hover: #350d36;
  --bg-sidebar-active: #1164a3;
  --bg-header: #350d36;
  --bg-surface: #f8f8f8;
  --bg-elevated: #ffffff;
  --bg-msg-hover: #f8f8f8;
  --bg-deleted: rgba(224, 30, 90, 0.07);
  --border-deleted: #e01e5a;
  --bg-code: #f4f4f6;
  --text-primary: #1d1c1d;
  --text-secondary: #616061;
  --text-muted: #868686;
  --text-bright: #1d1c1d;
  --border-color: #dddddd;
  --accent-primary: #1264a3;
  --accent-green: #007a5a;
  --accent-danger: #e01e5a;
  --accent-warning: #d9822b;
  --mention-bg: rgba(29, 155, 209, 0.15);
  --mention-text: #1264a3;
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.12);
}

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

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-app);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.5;
  overflow: hidden;
}

.hidden {
  display: none !important;
}

/* Login View */
.login-backdrop {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  width: 100vw;
  background: radial-gradient(circle at top left, #2c1638, #121016 70%);
  padding: 16px;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.brand-logo {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: linear-gradient(135deg, #4a154b, #1164a3);
  color: #fff;
  font-size: 26px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.login-brand h1 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-bright);
}

.login-brand .subtitle {
  font-size: 12px;
  color: var(--text-secondary);
}

.login-alert {
  background: rgba(224, 30, 90, 0.15);
  border: 1px solid var(--accent-danger);
  color: #ff80a6;
  padding: 10px 12px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 13px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.filter-field input,
.filter-field select,
.search-main-input,
.sidebar-search,
.workspace-select {
  width: 100%;
  padding: 9px 12px;
  background: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
}

.form-group input:focus,
.search-main-input:focus,
.sidebar-search:focus {
  border-color: var(--accent-primary);
}

.login-footer {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
  text-align: center;
}

/* Buttons & Badges */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s ease, background 0.15s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-green);
  color: #fff;
}

.btn-primary:hover {
  opacity: 0.92;
}

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

.btn-secondary:hover {
  background: var(--bg-elevated);
}

.btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.18);
  color: #e8e8e8;
}

[data-theme="light"] .channel-header .btn-ghost,
[data-theme="light"] .drawer-header .btn-ghost {
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

.btn-block {
  width: 100%;
}

/* App Shell */
.app-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

.top-header {
  height: 46px;
  background: var(--bg-header);
  color: #ffffff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  flex-shrink: 0;
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mini {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background: #1164a3;
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.app-title {
  font-weight: 700;
  font-size: 15px;
}

.readonly-badge, .readonly-pill {
  background: rgba(43, 172, 118, 0.22);
  border: 1px solid var(--accent-green);
  color: #6ee7b7;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 2px 7px;
  border-radius: 999px;
  display: inline-block;
}

.stats-pills {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 8px;
}

.stat-pill {
  background: rgba(255, 255, 255, 0.1);
  color: #e2e8f0;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 11px;
}

.stat-pill.deleted {
  background: rgba(224, 30, 90, 0.22);
  color: #fda4af;
}

.user-pill {
  font-size: 12px;
  color: #cbd5e1;
}

/* Main 3-Pane Body */
.main-body {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* Left Sidebar */
.left-sidebar {
  width: 265px;
  background: var(--bg-sidebar);
  color: #cfc3cf;
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.workspace-selector-box {
  padding: 12px 14px 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-label {
  display: block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.6px;
  color: #a395a4;
  margin-bottom: 4px;
}

.workspace-select {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.15);
  font-weight: 600;
  padding: 6px 8px;
}

.workspace-select option {
  background: #1a1d21;
  color: #ffffff;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  padding: 8px;
  gap: 3px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: none;
  color: #cfc3cf;
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
}

.nav-tab:hover {
  background: var(--bg-sidebar-hover);
  color: #fff;
}

.nav-tab.active {
  background: var(--bg-sidebar-active);
  color: #ffffff;
  font-weight: 600;
}

.sidebar-filter-box {
  padding: 8px 10px;
}

.sidebar-search {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.14);
  color: #ffffff;
  padding: 6px 10px;
  font-size: 12px;
}

.sidebar-search::placeholder {
  color: #9e8f9f;
}

.sidebar-channels {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px 16px;
}

.channel-group {
  margin-bottom: 14px;
}

.channel-group-header {
  font-size: 11px;
  font-weight: 700;
  color: #9e8f9f;
  padding: 4px 8px;
  letter-spacing: 0.4px;
}

.channel-list {
  list-style: none;
}

.channel-item {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 10px;
  border-radius: 5px;
  cursor: pointer;
  color: #cfc3cf;
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.channel-item:hover {
  background: var(--bg-sidebar-hover);
  color: #fff;
}

.channel-item.active {
  background: var(--bg-sidebar-active);
  color: #ffffff;
  font-weight: 600;
}

.channel-prefix {
  opacity: 0.8;
  font-size: 13px;
  flex-shrink: 0;
}

/* Center Pane */
.center-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--bg-app);
}

.pane-view {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
}

.channel-header {
  padding: 12px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg-surface);
  flex-shrink: 0;
}

.channel-header-info h2 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-bright);
}

.channel-meta {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.channel-header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

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

/* Message Feed */
.message-feed {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.empty-state {
  margin: auto;
  text-align: center;
  color: var(--text-muted);
  padding: 40px 20px;
  max-width: 460px;
}

.message-card {
  display: flex;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid transparent;
  transition: background 0.1s ease;
}

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

.message-card.is-deleted {
  background: var(--bg-deleted);
  border-left: 4px solid var(--border-deleted);
}

.msg-avatar {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  background: linear-gradient(135deg, #1264a3, #4a154b);
  color: #ffffff;
  font-weight: 700;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  text-transform: uppercase;
}

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

.msg-header {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 4px;
}

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

.msg-realname {
  font-size: 12px;
  color: var(--text-secondary);
}

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

.msg-channel-pill {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--accent-primary);
  font-size: 11px;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 4px;
  cursor: pointer;
}

.badge-deleted {
  background: var(--accent-danger);
  color: #ffffff;
  font-size: 10px;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.4px;
}

.badge-edited {
  background: rgba(236, 178, 46, 0.16);
  border: 1px solid var(--accent-warning);
  color: var(--accent-warning);
  font-size: 11px;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 4px;
  cursor: pointer;
}

.badge-edited:hover {
  opacity: 0.85;
}

.msg-text {
  color: var(--text-primary);
  word-wrap: break-word;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  font-size: 14px;
}

.msg-text code {
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12.5px;
}

.msg-text pre {
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  padding: 10px 12px;
  border-radius: 6px;
  overflow-x: auto;
  margin: 6px 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12.5px;
}

.msg-text pre code {
  border: none;
  padding: 0;
  background: transparent;
}

.mention-pill {
  background: var(--mention-bg);
  color: var(--mention-text);
  padding: 1px 5px;
  border-radius: 4px;
  font-weight: 600;
}

/* Reactions */
.msg-reactions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.reaction-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--text-primary);
}

/* File Attachments inside Messages */
.msg-files {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}

.file-attachment-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 12px;
  max-width: 520px;
}

.file-attachment-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

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

.file-meta-line {
  font-size: 11px;
  color: var(--text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 6px;
}

.file-preview-img {
  max-width: 100%;
  max-height: 280px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  display: block;
  margin-top: 6px;
}

.file-preview-media {
  width: 100%;
  max-width: 440px;
  margin-top: 6px;
}

/* Thread & Action Footer */
.msg-footer-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
}

.btn-thread-link {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--accent-primary);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 5px;
  cursor: pointer;
}

.btn-thread-link:hover {
  background: var(--bg-surface);
}

/* Search & Files Header */
.search-header {
  padding: 16px 20px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
}

.search-header h2 {
  font-size: 16px;
  margin-bottom: 12px;
  color: var(--text-bright);
}

.search-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.search-bar-row {
  display: flex;
  gap: 10px;
}

.search-filters-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: flex-end;
}

.filter-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 140px;
}

.filter-field.grow {
  flex: 1;
  min-width: 200px;
}

.filter-field label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
}

.checkbox-field {
  justify-content: flex-end;
  padding-bottom: 8px;
}

.results-meta {
  padding: 8px 20px;
  font-size: 12px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}

/* Files Gallery Grid */
.files-grid {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 14px;
  align-content: start;
}

.gallery-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
}

.gallery-thumb-box {
  height: 150px;
  background: var(--bg-code);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

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

.sha-badge {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 10.5px;
  background: var(--bg-code);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

/* Right Drawer (Thread & Revisions) */
.right-drawer {
  width: 400px;
  background: var(--bg-surface);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.drawer-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.drawer-header h3 {
  font-size: 15px;
  color: var(--text-bright);
}

.drawer-subtitle {
  font-size: 11px;
  color: var(--text-secondary);
}

.drawer-content {
  flex: 1;
  overflow-y: auto;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.revisions-box {
  margin-top: 8px;
  background: var(--bg-code);
  border: 1px solid var(--accent-warning);
  border-radius: 6px;
  padding: 8px 10px;
}

.revisions-box summary {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-warning);
  cursor: pointer;
}

.revision-item {
  border-top: 1px solid var(--border-color);
  padding-top: 6px;
  margin-top: 6px;
  font-size: 12.5px;
}

.revision-time {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 2px;
}

@media (max-width: 960px) {
  .left-sidebar {
    width: 210px;
  }
  .right-drawer {
    position: fixed;
    right: 0;
    top: 46px;
    bottom: 0;
    width: 90vw;
    max-width: 400px;
    z-index: 50;
    box-shadow: var(--shadow-card);
  }
}