/* ==========================================================================
   TOKENS
   ========================================================================== */

/* Non-color tokens (shared by both themes) */
:root {
  /* Scaling: change --ui-scale to resize the whole UI */
  --ui-scale: 1;
  --base-font-size: calc(14px * var(--ui-scale));

  /* Typography (1rem = 14px at scale 1) */
  --font-sans: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --fs-xs: 0.85rem;
  --fs-sm: 0.95rem;
  --fs-md: 1.15rem;
  --fs-lg: 1.25rem;

  /* Sizing */
  --avatar-size: 2.5rem;
  --header-height: 4.85rem;
  --header-height-compact: 4rem;

  /* Spacing */
  --spacing-xs: 0.3rem;
  --spacing-sm: 0.6rem;
  --spacing-md: 1.15rem;
  --spacing-lg: 1.7rem;

  /* Stacking order */
  --z-nav: 10;
  --z-scrim: 90;
  --z-drawer: 95;
  --z-popover: 100;
  --z-select: 150;
  --z-modal: 200;

  /* Hard shadow offsets (color comes from the theme) */
  --shadow-offset-sm: 6px 6px 0;
  --shadow-offset-md: 8px 8px 0;
  --shadow-offset-lg: 12px 12px 0;
  --shadow-offset-drawer-left: 6px 0 0;
  --shadow-offset-drawer-right: -6px 0 0;
}

/* Large displays: scale the whole UI up in steps */
@media (min-width: 1920px) {
  :root {
    --ui-scale: 1.15;
  }
}
@media (min-width: 2560px) {
  :root {
    --ui-scale: 1.3;
  }
}
@media (min-width: 3840px) {
  :root {
    --ui-scale: 1.6;
  }
}

/* Dark theme (default) */
:root,
[data-theme="dark"] {
  color-scheme: dark;

  /* Surfaces */
  --bg-timeline: #0a0a0a;
  --bg-sidebar: #121212;
  --bg-composer: #121212;
  --bg-hover: #1e1e1e;
  --bg-active: #2a2a2a;

  /* Text */
  --text-primary: #e4e4e4;
  --text-secondary: #8c8c8c;
  --text-faint: #444444;
  --on-accent: #ffffff;

  /* Lines */
  --border: #444444;
  --border-subtle: #0a0a0a;
  --border-width-strong: 1px;

  /* Accents */
  --accent-indigo: #4a658a;
  --accent-indigo-dim: rgba(74, 101, 138, 0.15);
  --accent-red: #a84a4a;
  --accent-mustard: #b58e34;
  --accent-green: #547a5b;

  /* Effects */
  --shadow-color: #000000;
  --scrim: rgba(0, 0, 0, 0.6);
  --scrim-strong: rgba(0, 0, 0, 0.85);
  --btn-hover: #ffffff;
}

/* Light theme */
[data-theme="light"] {
  color-scheme: light;

  /* Surfaces */
  --bg-timeline: #d4d5d8;
  --bg-sidebar: #bcbdc2;
  --bg-composer: #bcbdc2;
  --bg-hover: #a9abb2;
  --bg-active: #969aa4;

  /* Text */
  --text-primary: #101114;
  --text-secondary: #363840;
  --text-faint: #5e616b;
  --on-accent: #f2f2f4;

  /* Lines */
  --border: #1c1d22;
  --border-subtle: #8a8c94;
  --border-width-strong: 2px;

  /* Accents */
  --accent-indigo: #1f3f8f;
  --accent-indigo-dim: rgba(31, 63, 143, 0.16);
  --accent-red: #a02828;
  --accent-mustard: #7a5500;
  --accent-green: #2f6a3a;

  /* Effects */
  --shadow-color: #34363d;
  --scrim: rgba(28, 29, 34, 0.55);
  --scrim-strong: rgba(28, 29, 34, 0.8);
  --btn-hover: #000000;
}

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

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: none !important;
  border-radius: 0 !important;
}

html {
  font-size: var(--base-font-size);
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  background-color: var(--bg-timeline);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  height: 100vh;
  height: 100dvh;
  display: flex;
  overflow: hidden;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-timeline);
}
::-webkit-scrollbar-thumb {
  background: var(--text-faint);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* ==========================================================================
   UTILITIES
   ========================================================================== */

.mono {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: -0.02em;
}
.sans {
  font-family: var(--font-sans);
}
.hidden {
  display: none !important;
}

.user-name,
.user-id,
.room-name,
.chat-topic,
#notif-display {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Shared hover state */
.sidebar-header:hover,
.room-item:hover,
.action-btn:hover,
.action-item:hover,
.modal-tab:hover,
.select-option:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

/* ==========================================================================
   LAYOUT SHELL
   ========================================================================== */

.app-container {
  display: flex;
  width: 100%;
  height: 100%;
  position: relative;
}

.main-layout {
  display: flex;
  width: 100%;
  height: 100vh;
  height: 100dvh;
}

/* Scrim behind mobile drawers */
.scrim {
  position: fixed;
  inset: 0;
  background: var(--scrim);
  z-index: var(--z-scrim);
}

/* --- Nav panel (leftmost) --- */
.nav-panel {
  width: 4.85rem;
  background-color: var(--bg-timeline);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-sm) 0;
  gap: var(--spacing-sm);
  flex-shrink: 0;
  z-index: var(--z-nav);
}

.nav-item {
  width: 3.4rem;
  height: 3.4rem;
  background-color: var(--bg-sidebar);
  border: 2px solid transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  font-weight: 700;
  text-decoration: none;
}
.nav-item:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border);
}
.nav-item[aria-current="page"] {
  background-color: var(--bg-active);
  color: var(--accent-mustard);
  border-color: var(--accent-mustard);
}
.nav-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.nav-separator {
  width: 2.3rem;
  height: 2px;
  background-color: var(--border);
  margin: var(--spacing-xs) 0;
}

/* --- Dual sidebar wrapper --- */
.left-wrapper {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-subtle);
}

.dual-sidebars {
  display: flex;
  flex-grow: 1;
  min-height: 0;
}

/* --- Context panel (second sidebar) --- */
.context-panel {
  width: 17rem;
  background-color: var(--bg-sidebar);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.context-content {
  flex-grow: 1;
  overflow-y: auto;
  padding: var(--spacing-md) 0;
}

.context-content a {
  text-decoration: none;
  color: inherit;
  display: block;
}

.action-item {
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.context-content a[aria-current="page"] .action-item {
  background-color: var(--bg-active);
  color: var(--text-primary);
  font-weight: 600;
}

/* --- Left sidebar (rooms) --- */
.sidebar {
  width: 18.5rem;
  background-color: var(--bg-sidebar);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  height: var(--header-height);
  padding: 0 var(--spacing-md);
  padding-bottom: var(--spacing-md);
  display: flex;
  align-items: flex-end;
  gap: var(--spacing-md);
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.user-info {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  white-space: nowrap;
}
.user-name {
  font-weight: 600;
  font-size: 1rem;
}
.user-id {
  font-size: 0.8rem;
  opacity: 0.6;
  margin-top: 2px;
}

.room-list {
  flex-grow: 1;
  overflow-y: auto;
  padding: var(--spacing-sm) 0;
}

.room-category {
  padding: var(--spacing-xs) var(--spacing-md);
  color: var(--text-faint);
  text-transform: uppercase;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-xs);
}

.room-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.45rem var(--spacing-md);
  cursor: pointer;
  color: var(--text-secondary);
  text-decoration: none;
}
.room-item.active {
  background-color: var(--bg-active);
  color: var(--text-primary);
}

/* --- Right sidebar (members / pinned) --- */
.right-sidebar {
  width: 21.5rem;
  background-color: var(--bg-sidebar);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  border-left: 1px solid var(--border-subtle);
}

.right-sidebar-header {
  padding: 0 var(--spacing-md);
  border-bottom: 1px solid var(--border-subtle);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  flex-shrink: 0;
}

.right-sidebar-content {
  flex-grow: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
}

.search-box {
  margin-bottom: var(--spacing-md);
}
.search-box input {
  width: 100%;
  background: var(--bg-timeline);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: var(--spacing-sm);
  outline: none;
  font-family: var(--font-sans);
}
.search-box input:focus {
  border-color: var(--text-secondary);
}

.member-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  cursor: pointer;
}
.member-item:hover .member-name {
  text-decoration: underline;
}
.member-name {
  font-weight: 500;
}
.member-role {
  color: var(--accent-mustard);
  margin-left: auto;
}

/* ==========================================================================
   CHAT
   ========================================================================== */

.chat-area {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-timeline);
  min-width: 20rem;
  min-height: 0;
}

.chat-placeholder {
  flex-grow: 1;
  background-color: var(--bg-timeline);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
}

/* --- Header --- */
.chat-header {
  background-color: var(--bg-sidebar);
  padding: 0 var(--spacing-md);
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
  gap: var(--spacing-sm);
}

.chat-title-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  overflow: hidden;
  min-width: 0;
}
.chat-title {
  font-size: var(--fs-lg);
  font-weight: 600;
  white-space: nowrap;
}
.chat-topic {
  color: var(--text-secondary);
}
.quiet-shield {
  color: var(--text-faint);
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.chat-header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  flex-shrink: 0;
}

.action-btn {
  width: 2.3rem;
  height: 2.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: transparent;
  border: none;
  color: inherit;
  flex-shrink: 0;
}
.action-btn.active {
  background-color: var(--bg-active);
  color: var(--text-primary);
}

/* Hamburger: hidden on desktop, shown in the mobile breakpoint */
.menu-toggle {
  display: none;
}

/* --- Timeline --- */
.timeline {
  flex-grow: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: var(--spacing-lg) 0;
  display: flex;
  flex-direction: column;
}

/* --- Timeline (virtual scroller) --- */
.timeline-container {
  flex: 1 1 0%;
  min-height: 0;
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.virtual-scroller-viewport {
  overflow-y: auto;
  overflow-x: hidden;
  width: 100%;
  height: 100%;
  flex: 1 1 0%;
  min-height: 0;
  position: relative;
  overflow-anchor: none;
}

.virtual-scroller-content {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}
.virtual-scroller-content.justify-end {
  justify-content: flex-end;
}

.virtual-scroller-items {
  display: flex;
  flex-direction: column;
  width: 100%;
  flex-shrink: 0;
}

.virtual-item-wrapper {
  width: 100%;
  flex-shrink: 0;
}

.virtual-spacer {
  flex-shrink: 0;
}

.virtual-sentinel {
  position: absolute;
  height: 4px;
  width: 100%;
  pointer-events: none;
}
.virtual-sentinel.top {
  top: 0;
}
.virtual-sentinel.bottom {
  bottom: 0;
}

/* --- Timeline items --- */
.timeline-start {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg) 0;
  color: var(--text-faint);
}
.timeline-start .title {
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--text-secondary);
}

.day-divider {
  text-align: center;
  color: var(--text-faint);
  margin: var(--spacing-lg) 0;
  position: relative;
}
.day-divider::before {
  content: "";
  position: absolute;
  top: 50%;
  left: var(--spacing-md);
  right: var(--spacing-md);
  height: 1px;
  background-color: var(--bg-hover);
  z-index: 1;
}
.day-divider span {
  background-color: var(--bg-timeline);
  padding: 0 var(--spacing-md);
  position: relative;
  z-index: 2;
}

.read-marker {
  width: 100%;
  border-top: 1px solid var(--accent-red);
  margin: var(--spacing-sm) 0;
  position: relative;
}
.read-marker span {
  position: absolute;
  right: var(--spacing-sm);
  top: -10px;
  background-color: var(--accent-red);
  color: var(--on-accent);
  font-size: var(--fs-xs);
  padding: 2px var(--spacing-sm);
}

.loading-indicator {
  display: flex;
  justify-content: center;
  padding: var(--spacing-md);
}
.spinner {
  width: 1.7rem;
  height: 1.7rem;
  border: 2px solid var(--text-faint);
  border-bottom-color: transparent;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* --- Messages --- */
.message-group {
  display: flex;
  padding: var(--spacing-xs) var(--spacing-lg);
  margin-top: var(--spacing-md);
}
.message-group:hover {
  background-color: var(--bg-hover);
}
.message-group.highlighted {
  background-color: var(--accent-indigo-dim);
}
.message-group.highlighted:hover {
  background-color: var(--bg-hover);
}
.message-group.menu-target {
  background-color: var(--bg-hover);
}

.message-avatar-col {
  width: var(--avatar-size);
  flex-shrink: 0;
  margin-right: var(--spacing-md);
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
}

.message-content-col {
  flex-grow: 1;
  min-width: 0;
}

.message-meta {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
  flex-wrap: wrap;
}
.message-author {
  color: var(--text-primary);
  font-weight: 600;
  cursor: pointer;
  font-size: var(--fs-md);
}
.message-author:hover {
  text-decoration: underline;
}
.message-time {
  color: var(--text-faint);
}

/* --- Message content --- */
.message-row {
  margin-bottom: 2px;
  overflow-wrap: break-word;
  word-break: break-word;
}

.message-text {
  font-size: var(--fs-md);
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-word;
}

.message-image-container {
  background-color: var(--bg-hover);
  overflow: hidden;
  position: relative;
}
.message-image-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
  font-size: var(--fs-sm);
}

/* Semantic message styles */
.msg-error {
  color: var(--accent-red);
}
.msg-system {
  color: var(--accent-mustard);
}

.unverified-flag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--accent-red);
  cursor: default;
}
.unverified-flag svg {
  width: 0.95rem;
  height: 0.95rem;
}

.mention {
  background-color: var(--accent-indigo);
  color: var(--on-accent);
  padding: 0 4px;
  cursor: pointer;
}

.spoiler {
  background-color: var(--text-primary);
  color: var(--text-primary);
  cursor: pointer;
}
.spoiler:hover {
  background-color: transparent;
}

/* --- Composer --- */
.composer-wrapper {
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--bg-timeline);
  flex-shrink: 0;
}

.composer {
  background-color: var(--bg-composer);
  display: flex;
  flex-direction: column;
  padding: var(--spacing-sm);
}
.composer:focus-within {
  outline: 1px solid var(--border);
}

.composer textarea {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  resize: none;
  height: 3.15rem;
  padding: var(--spacing-xs);
}
.composer textarea:focus {
  outline: none;
}

.composer-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-sm);
}

.composer-toolbar {
  display: flex;
  gap: var(--spacing-md);
  color: var(--text-faint);
}
.composer-toolbar svg {
  cursor: pointer;
}
.composer-toolbar svg:hover {
  color: var(--text-primary);
}

/* ==========================================================================
   COMPONENTS
   ========================================================================== */

/* --- Avatar --- */
.avatar {
  width: var(--avatar-size);
  height: var(--avatar-size);
  flex-shrink: 0;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent-indigo);
  border: var(--border-width-strong) solid var(--text-primary);
  box-shadow: 3px 3px 0 var(--bg-sidebar), 4px 4px 0 var(--text-primary);
}
.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.avatar-initial {
  color: var(--on-accent);
  font-size: 1rem;
  font-weight: 600;
}

[data-theme="light"] .avatar {
  box-shadow: 3px 3px 0 var(--shadow-color);
}

.nav-avatar,
[data-theme="light"] .nav-avatar {
  width: 100%;
  height: 100%;
  background-color: transparent;
  border: none;
  box-shadow: none;
}

/* --- Badge --- */
.badge {
  background-color: var(--accent-indigo);
  color: var(--on-accent);
  padding: 0 0.45rem;
  font-size: var(--fs-xs);
}

/* --- Buttons --- */
button.primary {
  background-color: var(--text-primary);
  color: var(--bg-timeline);
  border: none;
  padding: 0.45rem var(--spacing-md);
  cursor: pointer;
  font-weight: 700;
}
button.primary:hover {
  background-color: var(--btn-hover);
}
button.primary:active {
  background-color: var(--text-secondary);
}

/* --- Popovers & menus --- */
.popover {
  position: absolute;
  background-color: var(--bg-sidebar);
  border: var(--border-width-strong) solid var(--border);
  box-shadow: var(--shadow-offset-sm) var(--shadow-color);
  z-index: var(--z-popover);
  display: flex;
  flex-direction: column;
  min-width: 15.7rem;
  max-width: calc(100vw - 24px);
}

.menu-group {
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--border);
}
.menu-group:last-child {
  border-bottom: none;
}

.menu-item {
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-primary);
  text-decoration: none;
}
.menu-item:hover {
  background-color: var(--bg-hover);
}
.menu-item.danger {
  color: var(--accent-red);
}
.menu-item.danger:hover {
  background-color: var(--accent-red);
  color: var(--on-accent);
}
.menu-item .shortcut {
  color: var(--text-faint);
  font-size: 0.8rem;
}

/* --- User card --- */
.user-card {
  width: 20rem;
  max-width: calc(100vw - 24px);
  padding: 0;
}
.user-card-header {
  background: var(--bg-hover);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.user-card-avatar {
  width: 5.7rem;
  height: 5.7rem;
  background-color: var(--accent-indigo);
}
.user-card-name {
  font-weight: 600;
  font-size: var(--fs-lg);
}
.user-card-role {
  color: var(--accent-mustard);
  margin-top: 4px;
}

/* --- Custom select --- */
.select-box {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
  border: 1px solid var(--border);
  background-color: var(--bg-timeline);
  color: var(--text-primary);
  padding: 0.45rem 0.7rem;
  cursor: pointer;
}
.select-box:hover {
  border-color: var(--text-secondary);
}

.select-trigger {
  cursor: pointer;
}

.select-value {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-secondary);
}

.select-caret {
  color: var(--text-faint);
  font-size: 0.7rem;
}

.select-options {
  background-color: var(--bg-sidebar);
  border: var(--border-width-strong) solid var(--border);
  box-shadow: var(--shadow-offset-sm) var(--shadow-color);
  min-width: 12.9rem;
  z-index: var(--z-select);
}
.select-options.inline {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
}
.select-options.layer {
  position: fixed;
  max-width: calc(100vw - 12px);
}

.select-option {
  padding: var(--spacing-sm) 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
}
.select-option.selected {
  color: var(--text-primary);
}
.select-option .check {
  color: var(--accent-indigo);
  visibility: hidden;
}
.select-option.selected .check {
  visibility: visible;
}

#notif-display {
  display: inline-block;
  max-width: 4rem;
  vertical-align: bottom;
}

/* --- Settings modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--scrim-strong);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-window {
  position: relative;
  width: 57rem;
  height: 43rem;
  max-width: 95vw;
  max-height: 90vh;
  background-color: var(--bg-timeline);
  border: var(--border-width-strong) solid var(--border);
  box-shadow: var(--shadow-offset-lg) var(--shadow-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-body {
  flex-grow: 1;
  display: flex;
  min-height: 0;
}

.modal-close {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  z-index: 1;
}

.modal-sidebar {
  width: 15.7rem;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  padding: var(--spacing-md) 0;
  flex-shrink: 0;
  overflow-y: auto;
}

.modal-tab {
  padding: 0.7rem var(--spacing-md);
  cursor: pointer;
  color: var(--text-secondary);
  white-space: nowrap;
}
.modal-tab.active {
  background-color: var(--bg-active);
  color: var(--text-primary);
  font-weight: 600;
}
.modal-tab.danger {
  color: var(--accent-red);
  margin-top: auto;
}
.modal-tab.danger:hover {
  background-color: var(--accent-red);
  color: var(--on-accent);
}

.modal-content {
  flex-grow: 1;
  padding: var(--spacing-lg);
  overflow-y: auto;
  min-width: 0;
}

h2.modal-title {
  margin-bottom: var(--spacing-lg);
}

/* ==========================================================================
   MEDIA
   ========================================================================== */

/* --- Shared containers --- */
.media-container {
  display: block;
  max-width: 95%;
  max-height: clamp(25rem, 50vh, 57rem);
  border: var(--border-width-strong) solid var(--border);
  box-shadow: var(--shadow-offset-sm) var(--shadow-color);
  background-color: var(--bg-sidebar);
}

.video-container {
  min-width: min(28.5rem, 100%);
  min-height: 15rem;
}

.media-error-panel, .media-loading-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  color: var(--text-faint);
  background-color: var(--bg-hover);
  min-height: 8.5rem;
  width: 17.8rem;
  max-width: 95%;
  border: var(--border-width-strong) solid var(--border);
  box-shadow: var(--shadow-offset-sm) var(--shadow-color);
}

.media-error-panel {
  color: var(--accent-red);
}

/* --- Audio player --- */
.audio-player {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background-color: var(--bg-sidebar);
  border: var(--border-width-strong) solid var(--border);
  box-shadow: var(--shadow-offset-sm) var(--shadow-color);
  min-width: 17.8rem;
  max-width: 90%;
}

.audio-player-wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  border: var(--border-width-strong) solid var(--border);
  background-color: var(--bg-timeline);
  max-width: 95%;
}

.audio-waveform-container {
  position: relative;
  flex: 1;
  height: 2.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  min-width: 7rem;
}

.audio-waveform-layer {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  gap: 1px;
}

.audio-waveform-bar {
  flex: 1;
  min-width: 1px;
}

.audio-waveform-layer.unplayed .audio-waveform-bar {
  background-color: var(--border);
}

.audio-waveform-layer.played .audio-waveform-bar {
  background-color: var(--text-primary);
}

.audio-play-btn {
  width: 2.3rem;
  height: 2.3rem;
  background-color: var(--text-primary);
  color: var(--bg-timeline);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--fs-md);
}

.audio-play-btn:hover {
  background-color: var(--btn-hover);
}

.audio-waveform-placeholder {
  flex: 1;
  height: 1.7rem;
  background-color: var(--bg-timeline);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-sm);
  font-size: var(--fs-xs);
  color: var(--text-secondary);
}

/* --- Video player --- */
.custom-video-player-wrapper {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 100%;
  background-color: #000;
  display: flex;
  flex-direction: column;
}

.video-controls-overlay {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background-color: var(--bg-sidebar);
  border-top: var(--border-width-strong) solid var(--border);
  opacity: 1;
  flex-shrink: 0;
}

.custom-video-player-wrapper:fullscreen .video-controls-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  opacity: 0;
  background-color: rgba(18, 18, 18, 0.85);
}

.custom-video-player-wrapper.paused:fullscreen .video-controls-overlay {
  opacity: 1;
}

@media (hover: hover) {
  .custom-video-player-wrapper:fullscreen .video-controls-overlay:hover {
    opacity: 1;
  }
}

.video-control-btn {
  min-width: 2.3rem;
  height: 2.3rem;
  padding: 0 4px;
  background-color: var(--bg-timeline);
  color: var(--text-primary);
  border: var(--border-width-strong) solid var(--border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--fs-md);
  flex-shrink: 0;
}

.video-control-btn.is-play {
  padding-left: 0.43rem;
  padding-bottom: 0.14rem;
}

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

.video-progress-bar {
  order: -1;
  flex: 1 1 100%;
  height: 0.9rem;
  background-color: var(--bg-timeline);
  border: var(--border-width-strong) solid var(--border);
  position: relative;
  cursor: pointer;
}

.video-progress-fill {
  height: 100%;
  background-color: var(--accent-mustard);
  width: 0%;
  border-right: var(--border-width-strong) solid var(--border);
}

.video-time {
  flex: 0 0 auto;
  min-width: 5.5rem;
  font-size: var(--fs-xs);
  color: var(--text-primary);
  text-align: center;
}

.video-volume-group {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1 1 8rem;
  min-width: 5.5rem;
  max-width: 12rem;
  margin-left: auto;
}

.video-volume-bar {
  flex: 1 1 auto;
  min-width: 2.5rem;
  height: 0.9rem;
  background-color: var(--bg-timeline);
  border: var(--border-width-strong) solid var(--border);
  position: relative;
  cursor: pointer;
}

@media (pointer: coarse) {
  .video-control-btn {
    min-width: 2.75rem;
    height: 2.75rem;
  }
  .video-progress-bar,
  .video-volume-bar {
    height: 1.4rem;
  }
}

/* --- Image viewer --- */
.image-viewer-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--scrim-strong);
  z-index: 250;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-viewer-img {
  max-width: calc(100vw - 4rem);
  max-height: calc(100vh - 4rem);
  object-fit: contain;
  cursor: zoom-in;
}

.image-viewer-img.zoomed {
  cursor: zoom-out;
}

.pixelated-render {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

/* ==========================================================================
   SCREENS
   ========================================================================== */

/* --- Login --- */
.login-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background-color: var(--bg-timeline);
}

.login-box {
  width: 100%;
  max-width: 28.5rem;
  background-color: var(--bg-sidebar);
  border: var(--border-width-strong) solid var(--border);
  box-shadow: var(--shadow-offset-lg) var(--shadow-color);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.login-header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}
.login-subtitle {
  color: var(--accent-mustard);
  font-size: var(--fs-sm);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}
.form-group label {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  text-transform: uppercase;
}

.form-input {
  width: 100%;
  background: var(--bg-timeline);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 0.7rem;
  outline: none;
  font-size: var(--fs-md);
}
.form-input:focus {
  border-color: var(--text-secondary);
}

.login-btn {
  margin-top: var(--spacing-sm);
  padding: 0.85rem;
  font-size: var(--fs-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Loading screen --- */
.center-wrapper {
  height: 100vh;
  height: 100dvh;
  width: 100%;
  background-color: var(--bg-timeline);
  display: flex;
  align-items: center;
  justify-content: center;
}

.diagnostic-block {
  background-color: var(--bg-sidebar);
  border: 2px solid var(--text-primary);
  box-shadow: var(--shadow-offset-md) var(--shadow-color);
  padding: var(--spacing-sm) var(--spacing-md);
  display: inline-flex;
}

.status-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--accent-mustard);
  font-weight: 700;
}

.mechanical-indicator {
  width: 0.85rem;
  height: 0.85rem;
  border: 2px solid var(--accent-mustard);
  background-color: var(--accent-mustard);
  animation: mechanical-blink 1.2s step-end infinite;
  flex-shrink: 0;
}

@keyframes mechanical-blink {
  0% {
    background-color: var(--accent-mustard);
  }
  15% {
    background-color: transparent;
  }
  25% {
    background-color: var(--accent-mustard);
  }
  45% {
    background-color: transparent;
  }
  50% {
    background-color: var(--accent-mustard);
  }
  60% {
    background-color: transparent;
  }
  100% {
    background-color: transparent;
  }
}

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

@media (max-width: 1024px) {
  .right-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    height: 100%;
    height: 100dvh;
    z-index: var(--z-drawer);
    box-shadow: var(--shadow-offset-drawer-right) var(--shadow-color);
  }
}

@media (max-width: 768px) {
  :root {
    --avatar-size: 2.25rem;
    --spacing-lg: 1.15rem;
  }

  /* Hamburger */
  .menu-toggle {
    display: flex;
  }

  /* Sideways shift: chat fills the screen; opening the drawer pushes it off to the right */
  .chat-area {
    width: 100vw;
    flex-shrink: 0;
    position: relative;
  }

  /* Drawer */
  .left-wrapper {
    display: none;
    flex-shrink: 0;
  }
  .left-wrapper.mobile-open {
    display: flex;
    max-width: 100vw;
  }
  .context-panel {
    flex-shrink: 1;
    min-width: 0;
  }

  /* Click shield over the pushed-aside chat */
  .chat-shield {
    position: absolute;
    inset: 0;
    z-index: var(--z-scrim);
    cursor: pointer;
  }

  /* Legacy drawer sidebar */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    height: 100dvh;
    width: 82vw;
    max-width: 21.5rem;
    z-index: var(--z-drawer);
    transform: translateX(-100%);
    box-shadow: var(--shadow-offset-drawer-left) var(--shadow-color);
  }
  .sidebar.open {
    transform: translateX(0);
  }

  .right-sidebar {
    width: 100%;
    max-width: 100%;
  }

  /* Headers */
  .sidebar-header {
    height: var(--header-height-compact);
  }
  .chat-header {
    height: var(--header-height-compact);
    padding: 0 var(--spacing-sm);
  }
  .chat-title-group {
    gap: var(--spacing-sm);
  }
  .chat-title {
    font-size: var(--fs-md);
  }
  .chat-header-actions {
    gap: 2px;
  }
  .action-btn {
    width: 2.6rem;
    height: 2.6rem;
  }

  /* Messages & composer */
  .message-group {
    padding: var(--spacing-xs) var(--spacing-md);
  }
  .message-avatar-col {
    margin-right: var(--spacing-sm);
  }
  .message-author {
    font-size: 1.05rem;
  }
  .composer-wrapper {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  .composer-toolbar {
    gap: var(--spacing-sm);
  }
  button.primary {
    padding: var(--spacing-sm) 1rem;
  }

  /* Modal */
  .modal-window {
    width: 95vw;
    height: 60dvh;
    max-width: 95vw;
    max-height: 90dvh;
    box-shadow: none;
  }
  .modal-body {
    width: 95vw;
    height: 60dvh;
    max-width: 95vw;
    max-height: 90dvh;
    flex-direction: column;
  }
  .modal-sidebar {
    width: 100%;
    flex-direction: row;
    overflow-x: auto;
    padding: var(--spacing-sm);
    gap: 2px;
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }
  .modal-tab {
    padding: var(--spacing-sm) 0.85rem;
  }
  .modal-tab.danger {
    margin-top: 0;
    margin-left: auto;
  }
  .modal-content {
    padding: var(--spacing-md);
  }

  .user-card {
    width: calc(100vw - 32px);
    max-width: 23rem;
  }

  .audio-player-wrapper {
    flex-wrap: wrap;
  }
  .audio-waveform-container {
    order: -1;
    flex: 1 1 100%;
    height: 2.75rem;
  }
}