:root {
  color-scheme: light;
  --bg: #f7f7f4;
  --surface: #ffffff;
  --surface-2: #eeeeea;
  --text: #202123;
  --muted: #6b6f76;
  --line: #dadbd5;
  --accent: #10a37f;
  --accent-dark: #0d7f66;
  --bubble-user: #e8f3ef;
  --bubble-bot: #ffffff;
  --danger: #b42318;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #171717;
  --surface: #212121;
  --surface-2: #2f2f2f;
  --text: #ececec;
  --muted: #a0a0a0;
  --line: #3a3a3a;
  --accent: #19c37d;
  --accent-dark: #12a66a;
  --bubble-user: #2f3f39;
  --bubble-bot: #262626;
  --danger: #ffb4ab;
  --shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Tahoma, Arial, sans-serif;
  letter-spacing: 0;
}

button,
input {
  font: inherit;
}

button {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  min-height: 38px;
  padding: 0 12px;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

input {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  padding: 0 12px;
}

.login-shell {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(420px, 100%);
  display: grid;
  gap: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 28px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.login-panel h1,
.sidebar h1,
.conversation h2,
.details-panel h2 {
  margin: 0;
}

.login-copy {
  color: var(--muted);
  margin: 10px 0 0;
  line-height: 1.7;
}

.login-form {
  display: grid;
  gap: 14px;
}

.login-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
}

.login-form button {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  font-weight: 700;
}

.form-error {
  min-height: 22px;
  color: var(--danger);
  margin: 0;
}

.app-shell {
  height: 100%;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr) 340px;
  overflow: hidden;
}

.sidebar,
.details-panel {
  background: var(--surface);
  border-left: 1px solid var(--line);
  display: flex;
  min-height: 0;
  flex-direction: column;
}

.details-panel {
  border-left: 0;
  border-right: 1px solid var(--line);
}

.sidebar-header,
.conversation-header,
.details-panel header,
.sidebar-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.sidebar-footer {
  position: sticky;
  bottom: 0;
  z-index: 1;
  flex-shrink: 0;
  border-top: 1px solid var(--line);
  border-bottom: 0;
  background: var(--surface);
}

.sidebar-header h1 {
  font-size: 1.15rem;
}

.icon-button {
  width: 38px;
  min-width: 38px;
  padding: 0;
  font-size: 1.1rem;
}

.search-box {
  padding: 14px 16px 8px;
}

.sidebar-actions,
.conversation-tools {
  display: flex;
  gap: 8px;
}

.sidebar-actions {
  padding: 8px 16px 12px;
}

.sidebar-actions button,
.conversation-tools button {
  flex: 1;
  white-space: nowrap;
}

.user-list {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 8px;
}

.user-card {
  width: 100%;
  display: grid;
  gap: 6px;
  text-align: right;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  padding: 12px;
}

.user-card:hover,
.user-card.active {
  background: var(--surface-2);
  border-color: var(--line);
}

.user-card.active {
  border-color: var(--accent);
}

.user-card-row,
.meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.user-name {
  font-weight: 700;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.count-pill {
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 0.78rem;
  padding: 2px 8px;
}

.user-meta,
.message-time,
.details-content,
.sidebar-footer,
.conversation-subtitle {
  color: var(--muted);
}

.user-meta,
.message-preview {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.conversation {
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.conversation-header {
  background: var(--bg);
}

.conversation-header > div {
  min-width: 0;
}

#conversationTitle,
#conversationSubtitle {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#conversationSubtitle {
  margin: 6px 0 0;
  color: var(--muted);
}

.mobile-users-button {
  display: none;
}

.message-list {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 24px max(24px, calc((100% - 820px) / 2));
}

.message-group {
  display: grid;
  gap: 14px;
  margin-bottom: 24px;
}

.message {
  display: grid;
  gap: 8px;
  max-width: 780px;
}

.message.user {
  margin-right: auto;
}

.message.bot {
  margin-left: auto;
}

.message-label {
  color: var(--muted);
  font-size: 0.83rem;
}

.message-bubble {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
  line-height: 1.8;
  white-space: pre-wrap;
}

.message.user .message-bubble {
  background: var(--bubble-user);
}

.message.bot .message-bubble {
  background: var(--bubble-bot);
}

.message-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 0.78rem;
}

.details-panel {
  overflow: hidden;
}

.app-shell.details-closed {
  grid-template-columns: 320px minmax(0, 1fr);
}

.app-shell.details-closed .details-panel {
  display: none;
}

.details-content {
  min-height: 0;
  overflow: auto;
  padding: 16px;
}

.detail-list {
  display: grid;
  gap: 12px;
}

.detail-item {
  display: grid;
  gap: 5px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}

.detail-item span {
  color: var(--muted);
  font-size: 0.82rem;
}

.detail-item strong {
  overflow-wrap: anywhere;
  color: var(--text);
}

.execution-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.execution-list span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 8px;
}

.empty-state {
  min-height: 160px;
  display: grid;
  place-items: center;
  color: var(--muted);
  text-align: center;
  line-height: 1.8;
}

[hidden] {
  display: none !important;
}

@media (max-width: 1100px) {
  .app-shell {
    grid-template-columns: 300px minmax(0, 1fr);
  }

  .details-panel {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(360px, 92vw);
    box-shadow: var(--shadow);
    transform: translateX(105%);
    transition: transform 180ms ease;
    z-index: 5;
  }

  .details-panel.open {
    transform: translateX(0);
  }
}

@media (max-width: 760px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(340px, 92vw);
    z-index: 6;
    box-shadow: var(--shadow);
    transform: translateX(105%);
    transition: transform 180ms ease;
  }

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

  .mobile-users-button {
    display: inline-flex;
    align-items: center;
  }

  .conversation-header {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .conversation-tools {
    width: 100%;
  }

  .message-list {
    padding: 18px 14px;
  }
}