:root {
  --bg: #fff;
  --fg: #000;
  --muted: #666;
  --line: #000;
  --panel: #f3f3f3;
  font-size: 16px;
}

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

html,
body {
  margin: 0;
  height: 100%;
  height: 100dvh;
  background: var(--bg);
  color: var(--fg);
  font-family: Arial, Helvetica, sans-serif;
}

body {
  overflow: hidden;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 2px solid var(--line);
  border-radius: 0;
}

button {
  cursor: pointer;
  padding: 0.55rem 0.85rem;
  background: var(--fg);
  color: var(--bg);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

button.secondary {
  background: var(--bg);
  color: var(--fg);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

input,
textarea {
  width: 100%;
  padding: 0.55rem 0.65rem;
}

textarea {
  resize: vertical;
  min-height: 3.2rem;
}

.app {
  height: 100%;
}

.screen {
  min-height: 100%;
}

.auth-screen {
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.auth-box {
  width: min(26rem, 100%);
  border: 2px solid var(--line);
  padding: 1.25rem;
}

.brand {
  margin: 0 0 0.25rem;
  font-size: 1.15rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-sub {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  margin-bottom: 1rem;
  border: 2px solid var(--line);
}

.tabs button {
  border: 0;
  border-right: 2px solid var(--line);
  background: var(--bg);
  color: var(--fg);
}

.tabs button:last-child {
  border-right: 0;
}

.tabs button.active {
  background: var(--fg);
  color: var(--bg);
}

.form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.form label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.banner {
  border: 2px solid var(--line);
  padding: 0.55rem 0.65rem;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.banner.error {
  background: var(--panel);
}

.muted {
  color: var(--muted);
  font-size: 0.85rem;
}

.backdrop {
  display: none;
}

.chat-screen {
  display: grid;
  grid-template-columns: 18rem minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr);
  height: 100%;
  height: 100vh;
  height: 100dvh;
  max-height: 100dvh;
  overflow: hidden;
}

.sidebar {
  grid-column: 1;
  grid-row: 1;
  border-right: 2px solid var(--line);
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  background: var(--bg);
  overflow: hidden;
}

.sidebar-head {
  padding: 0.85rem;
  border-bottom: 2px solid var(--line);
}

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

.user-email {
  font-size: 0.85rem;
  word-break: break-all;
}

.settings {
  padding: 0.75rem 0.85rem;
  border-bottom: 2px solid var(--line);
}

.settings-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.45rem;
}

.toggle-row {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.toggle-row input {
  width: auto;
  margin-top: 0.15rem;
  accent-color: #000;
}

.settings-hint {
  margin: 0.4rem 0 0;
  font-size: 0.75rem;
}

.search {
  position: relative;
  padding: 0.75rem 0.85rem;
  border-bottom: 2px solid var(--line);
}

.search-dropdown {
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  top: calc(100% - 0.35rem);
  z-index: 6;
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 14rem;
  overflow: auto;
  background: var(--bg);
  border: 2px solid var(--line);
}

.search-dropdown[hidden] {
  display: none;
}

.search-dropdown li button {
  width: 100%;
  text-align: left;
  background: var(--bg);
  color: var(--fg);
  border: 0;
  border-bottom: 1px solid var(--line);
  text-transform: none;
  letter-spacing: 0;
}

.search-dropdown li:last-child button {
  border-bottom: 0;
}

.search-dropdown li button:hover,
.search-dropdown li button:focus {
  background: var(--fg);
  color: var(--bg);
}

.chat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow: auto;
  flex: 1;
}

.chat-list li button {
  width: 100%;
  text-align: left;
  background: var(--bg);
  color: var(--fg);
  border: 0;
  border-bottom: 1px solid var(--line);
  text-transform: none;
  letter-spacing: 0;
}

.chat-list li button.active,
.chat-list li button:hover {
  background: var(--fg);
  color: var(--bg);
}

.chat-title {
  display: block;
  font-weight: 700;
}

.chat-meta {
  display: block;
  font-size: 0.75rem;
  opacity: 0.7;
}

.main {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  height: 100%;
  max-height: 100%;
  overflow: hidden;
}

.main-head {
  flex: 0 0 auto;
  padding: 0.85rem 1rem;
  border-bottom: 2px solid var(--line);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.messages {
  flex: 0 1 auto;
  max-height: 36%;
  min-height: 6rem;
  overflow-x: hidden;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border-bottom: 2px solid var(--line);
}

.bubble {
  max-width: min(36rem, 90%);
  border: 2px solid var(--line);
  padding: 0.55rem 0.7rem;
}

.bubble.own {
  margin-left: auto;
  background: var(--fg);
  color: var(--bg);
}

.bubble .who {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.composer {
  flex: 1 1 0;
  min-height: 0;
  padding: 0.75rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: minmax(0, 1fr);
  align-items: stretch;
  gap: 0.5rem;
  background: var(--bg);
}

.composer-editor-wrap {
  min-width: 0;
  min-height: 0;
  height: 100%;
  border: 2px solid var(--line);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.composer > button[type='submit'] {
  align-self: end;
}

.composer .ql-toolbar.ql-snow {
  flex: 0 0 auto;
  border: 0;
  border-bottom: 2px solid var(--line);
  border-radius: 0;
  background: var(--bg);
  padding: 0.35rem 0.4rem;
}

.composer .ql-container.ql-snow {
  flex: 1 1 0;
  min-height: 0;
  border: 0;
  border-radius: 0;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.composer .ql-editor {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  padding: 0.55rem 0.65rem;
}

.composer .ql-editor.ql-blank::before {
  color: var(--muted);
  font-style: normal;
  left: 0.65rem;
  right: 0.65rem;
}

.composer .ql-snow .ql-stroke {
  stroke: #000;
}

.composer .ql-snow .ql-fill {
  fill: #000;
}

.composer .ql-snow .ql-picker {
  color: #000;
}

/* Size labels: XS / S / M / L / XL */
.composer .ql-snow .ql-picker.ql-size .ql-picker-label::before,
.composer .ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: 'S';
}

.composer .ql-snow .ql-picker.ql-size .ql-picker-label[data-value='12px']::before,
.composer .ql-snow .ql-picker.ql-size .ql-picker-item[data-value='12px']::before {
  content: 'XS';
}

.composer .ql-snow .ql-picker.ql-size .ql-picker-label[data-value='16px']::before,
.composer .ql-snow .ql-picker.ql-size .ql-picker-item[data-value='16px']::before {
  content: 'S';
}

.composer .ql-snow .ql-picker.ql-size .ql-picker-label[data-value='22px']::before,
.composer .ql-snow .ql-picker.ql-size .ql-picker-item[data-value='22px']::before {
  content: 'M';
}

.composer .ql-snow .ql-picker.ql-size .ql-picker-label[data-value='30px']::before,
.composer .ql-snow .ql-picker.ql-size .ql-picker-item[data-value='30px']::before {
  content: 'L';
}

.composer .ql-snow .ql-picker.ql-size .ql-picker-label[data-value='48px']::before,
.composer .ql-snow .ql-picker.ql-size .ql-picker-item[data-value='48px']::before {
  content: 'XL';
}

.composer .ql-snow .ql-picker.ql-font .ql-picker-label[data-value='sans-serif']::before,
.composer .ql-snow .ql-picker.ql-font .ql-picker-item[data-value='sans-serif']::before {
  content: 'Sans-Serif';
  font-family: sans-serif;
}

.composer .ql-snow .ql-picker.ql-font .ql-picker-label[data-value='serif']::before,
.composer .ql-snow .ql-picker.ql-font .ql-picker-item[data-value='serif']::before {
  content: 'Serif';
  font-family: serif;
}

.composer .ql-snow .ql-picker.ql-font .ql-picker-label[data-value='monospace']::before,
.composer .ql-snow .ql-picker.ql-font .ql-picker-item[data-value='monospace']::before {
  content: 'Monospace';
  font-family: monospace;
}

.bubble-body {
  word-break: break-word;
  line-height: 1.35;
}

.bubble-body .ql-align-left {
  text-align: left;
}

.bubble-body .ql-align-center {
  text-align: center;
}

.bubble-body .ql-align-right {
  text-align: right;
}

.bubble-body .ql-align-justify {
  text-align: justify;
}

.bubble-body p {
  margin: 0 0 0.35rem;
}

.bubble-body p:last-child {
  margin-bottom: 0;
}

.bubble.own .bubble-body {
  color: inherit;
}

.bubble.own .bubble-body a {
  color: inherit;
}

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

.menu-btn {
  display: none;
}

@media (max-width: 800px) {
  .chat-screen {
    grid-template-columns: minmax(0, 1fr);
  }

  .main {
    grid-column: 1;
  }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: min(18rem, 88vw);
    height: 100%;
    z-index: 4;
    transform: translateX(-100%);
    border-right: 2px solid var(--line);
  }

  .sidebar.open {
    transform: none;
  }

  .menu-btn {
    display: inline-block;
  }

  .backdrop {
    position: fixed;
    inset: 0;
    background: #000;
    opacity: 0.25;
    z-index: 3;
  }

  .backdrop.show {
    display: block;
  }
}

/* -------------------------------------------------------------------------- */
/* Conversations: invitations, top bar, management panel                      */
/* -------------------------------------------------------------------------- */

.invitations-section {
  padding: 0.75rem 0.85rem;
  border-bottom: 2px solid var(--line);
}

.invitation-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.invitation-list .muted-item {
  font-size: 0.8rem;
  color: var(--muted);
  padding: 0.25rem 0;
}

.invitation-item {
  border: 2px solid var(--line);
  padding: 0.45rem 0.5rem;
  margin-bottom: 0.4rem;
}

.invitation-item .inv-title {
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
  word-break: break-all;
}

.invitation-item .inv-actions {
  display: flex;
  gap: 0.35rem;
}

.invitation-item .inv-actions button {
  flex: 1;
  padding: 0.35rem 0.4rem;
  font-size: 0.75rem;
}

.top-bar {
  flex: 0 0 auto;
  padding: 0.65rem 0.85rem;
  border-bottom: 2px solid var(--line);
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.top-bar-summary {
  flex: 1;
  min-width: 0;
}

.top-bar-title-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.top-bar-title {
  word-break: break-word;
}

.type-badge {
  display: inline-block;
  border: 2px solid var(--line);
  padding: 0.1rem 0.35rem;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 700;
}

.top-bar-meta {
  font-size: 0.8rem;
  margin-top: 0.15rem;
}

.expand-btn {
  flex: 0 0 auto;
  padding: 0.35rem 0.55rem;
  min-width: 2.2rem;
}

.management-panel {
  flex: 0 0 auto;
  border-bottom: 2px solid var(--line);
  background: var(--panel);
  max-height: 40vh;
  overflow: auto;
  padding: 0.75rem 0.85rem;
}

.management-panel[hidden] {
  display: none;
}

.management-panel.open {
  display: block;
}

.panel-section {
  margin-bottom: 0.85rem;
}

.panel-section:last-child {
  margin-bottom: 0;
}

.invite-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.invite-row input[type='text'] {
  flex: 1 1 8rem;
  min-width: 0;
}

.inline-check {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.inline-check input {
  width: auto;
}

.table-wrap {
  overflow-x: auto;
  border: 2px solid var(--line);
}

.member-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.member-table th,
.member-table td {
  border-bottom: 1px solid var(--line);
  padding: 0.4rem 0.45rem;
  text-align: left;
  vertical-align: middle;
}

.member-table th {
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.7rem;
  background: var(--bg);
}

.member-table tr:last-child td {
  border-bottom: 0;
}

.member-table label {
  margin-right: 0.45rem;
  font-size: 0.75rem;
}

.member-table input[type='checkbox'] {
  width: auto;
  accent-color: #000;
}

.panel-actions {
  white-space: nowrap;
}

.panel-actions button {
  padding: 0.25rem 0.4rem;
  font-size: 0.7rem;
  margin-left: 0.2rem;
}

/* Quill alignment safety net inside bubbles */
.ql-align-center {
  text-align: center !important;
}
.ql-align-right {
  text-align: right !important;
}
.ql-align-justify {
  text-align: justify !important;
}
.ql-align-left {
  text-align: left !important;
}

.bubble-body .ql-editor {
  padding: 0;
  margin: 0;
  border: 0;
  background: transparent;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
}
.bubble.own .bubble-body .ql-editor {
  color: inherit;
}