/*
 * gen2b-wa-exporter — UI Kit-derived stylesheet
 *
 * Tokens mirrored from platform-frontend/gen2b-ui-kit/tailwind.config.js
 * (palette, radii, shadows, fonts) and component patterns from
 * src/scss/components/{button,textfield}.scss. Hand-written CSS only —
 * no Tailwind, no SCSS, no Node toolchain.
 *
 * Light theme by default. All custom classes are prefixed `ui-` to avoid
 * collisions if anything else gets added later.
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ------------------------------------------------------------------ */
/* Design tokens                                                       */
/* ------------------------------------------------------------------ */
:root {
  /* Brand (teal) */
  --brand-50:  #F0FDFA;
  --brand-100: #CCFBF1;
  --brand-200: #99F6E4;
  --brand-300: #5EEAD4;
  --brand-400: #2DD4BF;
  --brand-500: #14B8A6;
  --brand-600: #0D9488;
  --brand-700: #0F766E;
  --brand-800: #115E59;
  --brand-900: #134E4A;

  /* Neutral */
  --neutral-50:  #F8FAFC;
  --neutral-100: #F7FAFC;
  --neutral-200: #EDF2F7;
  --neutral-300: #E2E8F0;
  --neutral-400: #CBD5E0;
  --neutral-500: #A0AEC0;
  --neutral-600: #718096;
  --neutral-700: #4A5568;
  --neutral-800: #2D3748;
  --neutral-900: #1A202C;

  /* Status — amber (warning) */
  --status-amber-50:  #FEF3C7;
  --status-amber-400: #F59E0B;
  --status-amber-600: #D97706;

  /* Status — green (success) */
  --status-green-50:  #F0FDF4;
  --status-green-400: #4ADE80;
  --status-green-600: #16A34A;

  /* Status — rose (danger) */
  --status-rose-50:  #FFF1F2;
  --status-rose-400: #FB7185;
  --status-rose-600: #E11D48;
  --status-rose-800: #9B2C2C;

  /* Brand secondary (indigo) */
  --brand-secondary-50:  #EEF2FF;
  --brand-secondary-400: #818CF8;
  --brand-secondary-600: #4F46E5;
  --brand-secondary-800: #3730A3;

  /* Basic */
  --basic-black: #000000;
  --basic-white: #FFFFFF;

  /* Radii (mirrors tailwind.config.js borderRadius) */
  --radius-1:  0.25rem;
  --radius-2:  0.5rem;
  --radius-3:  0.75rem;
  --radius-4:  1rem;
  --radius-6:  1.5rem;
  --radius-8:  2rem;
  --radius-12: 3rem;
  --radius-16: 4rem;
  --radius-24: 6rem;

  /* Shadows */
  --shadow-sm:   0px 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-base: 0px 1px 3px rgba(0, 0, 0, 0.1), 0px 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md:   0px 4px 6px -1px rgba(0, 0, 0, 0.1), 0px 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg:   0px 10px 15px -3px rgba(0, 0, 0, 0.1), 0px 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-2lg:  0px 10px 22px rgba(45, 77, 108, 0.15);
  --shadow-xl:   0px 20px 25px -5px rgba(0, 0, 0, 0.1), 0px 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-inner: inset 0px 2px 4px rgba(0, 0, 0, 0.06);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs:   0.75rem;
  --font-size-sm:   0.875rem;
  --font-size-base: 1rem;
  --font-size-lg:   1.125rem;
  --font-size-xl:   1.25rem;
  --font-size-2xl:  1.5rem;
  --font-size-3xl:  1.875rem;
  --font-size-4xl:  2.25rem;

  /* Semantic aliases (light theme) */
  --color-bg:           var(--neutral-50);
  --color-surface:      var(--basic-white);
  --color-surface-alt:  var(--neutral-100);
  --color-border:       var(--neutral-300);
  --color-border-strong: var(--neutral-400);
  --color-text:         var(--neutral-900);
  --color-text-muted:   var(--neutral-600);
  --color-text-subtle:  var(--neutral-500);
  --color-primary:      var(--brand-600);
  --color-primary-hover: var(--brand-700);
  --color-link:         var(--brand-700);
}

/* ------------------------------------------------------------------ */
/* Base reset + body                                                   */
/* ------------------------------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  margin: 0 0 0.75rem 0;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.25;
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }

p {
  margin: 0 0 0.75rem 0;
}

code,
pre {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: var(--font-size-sm);
}

/* ------------------------------------------------------------------ */
/* Layout helpers                                                      */
/* ------------------------------------------------------------------ */
.ui-container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 3rem;
}

.ui-muted {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.ui-link {
  color: var(--color-link);
  text-decoration: none;
  font-weight: 500;
  transition: color 200ms ease;
}

.ui-link:hover {
  color: var(--brand-800);
  text-decoration: underline;
}

/* ------------------------------------------------------------------ */
/* Header                                                              */
/* ------------------------------------------------------------------ */
.ui-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.ui-header__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.875rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.ui-header__brand {
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.ui-header__brand:hover {
  color: var(--color-primary);
}

.ui-header__nav {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}

/* ------------------------------------------------------------------ */
/* Card                                                                */
/* ------------------------------------------------------------------ */
.ui-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-3);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
}

.ui-card + .ui-card {
  margin-top: 1.25rem;
}

.ui-card__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin: 0 0 0.25rem 0;
}

.ui-card__subtitle {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin: 0 0 1.25rem 0;
}

/* ------------------------------------------------------------------ */
/* Button                                                              */
/* ------------------------------------------------------------------ */
.ui-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  font-weight: 600;
  line-height: 1.25;
  padding: 0.5rem 0.875rem;
  border: 0;
  border-radius: var(--radius-2);
  cursor: pointer;
  transition: background-color 200ms ease, color 200ms ease, transform 100ms ease, box-shadow 200ms ease;
  text-decoration: none;
  white-space: nowrap;
  outline: none;
}

.ui-button:focus-visible {
  box-shadow: 0 0 0 3px var(--brand-200);
}

.ui-button:active:not(:disabled) {
  transform: scale(0.97);
}

.ui-button:disabled {
  cursor: not-allowed;
  background-color: var(--neutral-100);
  color: var(--neutral-400);
}

/* Primary (default) */
.ui-button,
.ui-button--primary {
  background-color: var(--brand-600);
  color: var(--basic-white);
}

.ui-button:hover:not(:disabled),
.ui-button--primary:hover:not(:disabled) {
  background-color: var(--brand-700);
}

/* Secondary */
.ui-button--secondary {
  background-color: var(--neutral-100);
  color: var(--neutral-900);
}

.ui-button--secondary:hover:not(:disabled) {
  background-color: var(--neutral-200);
}

/* Ghost / tertiary */
.ui-button--ghost {
  background-color: transparent;
  color: var(--neutral-700);
}

.ui-button--ghost:hover:not(:disabled) {
  background-color: var(--neutral-100);
}

/* Danger */
.ui-button--danger {
  background-color: var(--status-rose-600);
  color: var(--basic-white);
}

.ui-button--danger:hover:not(:disabled) {
  background-color: var(--status-rose-800);
}

/* Sizes */
.ui-button--sm {
  font-size: var(--font-size-xs);
  padding: 0.375rem 0.625rem;
}

.ui-button--lg {
  font-size: var(--font-size-base);
  padding: 0.75rem 1.25rem;
}

/* ------------------------------------------------------------------ */
/* Input                                                               */
/* ------------------------------------------------------------------ */
.ui-input {
  display: block;
  width: 100%;
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  color: var(--neutral-900);
  background-color: var(--basic-white);
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--neutral-400);
  border-radius: var(--radius-2);
  outline: none;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.ui-input::placeholder {
  color: var(--neutral-400);
}

.ui-input:hover {
  border-color: var(--neutral-500);
}

.ui-input:focus {
  border-color: var(--brand-500);
  box-shadow: 0 0 0 2px var(--brand-200);
}

.ui-input:disabled {
  background-color: var(--neutral-100);
  color: var(--neutral-300);
}

.ui-input--danger,
.ui-input.is-error {
  border-color: var(--status-rose-400);
  color: var(--status-rose-600);
}

.ui-input--danger:focus,
.ui-input.is-error:focus {
  border-color: var(--status-rose-600);
  box-shadow: 0 0 0 2px var(--status-rose-400);
}

.ui-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--neutral-900);
  margin: 0 0 0.375rem 0;
}

.ui-form-row {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
  flex-wrap: wrap;
}

.ui-form-row > * {
  min-width: 0;
}

.ui-form-row .ui-input {
  flex: 1 1 240px;
}

/* ------------------------------------------------------------------ */
/* Table                                                               */
/* ------------------------------------------------------------------ */
.ui-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background-color: var(--color-surface);
  font-size: var(--font-size-sm);
}

.ui-table thead th {
  text-align: left;
  font-weight: 600;
  color: var(--neutral-700);
  background-color: var(--neutral-50);
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.ui-table tbody td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--neutral-200);
  color: var(--neutral-800);
  vertical-align: middle;
}

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

.ui-table tbody tr:hover td {
  background-color: var(--neutral-50);
}

.ui-table--card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-3);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.ui-table__empty {
  text-align: center;
  color: var(--color-text-muted);
  padding: 2rem 1rem;
  font-style: italic;
}

/* ------------------------------------------------------------------ */
/* Pill / status badge                                                 */
/* ------------------------------------------------------------------ */
.ui-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--font-size-xs);
  font-weight: 600;
  line-height: 1;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-6);
  background-color: var(--neutral-100);
  color: var(--neutral-700);
  white-space: nowrap;
}

.ui-pill::before {
  content: '';
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background-color: currentColor;
  opacity: 0.85;
}

/* Connected / online — green */
.ui-pill--connected,
.ui-pill--success {
  background-color: var(--status-green-50);
  color: var(--status-green-600);
}

/* Awaiting QR — amber */
.ui-pill--awaiting_qr,
.ui-pill--warning {
  background-color: var(--status-amber-50);
  color: var(--status-amber-600);
}

/* Pending — indigo (brand secondary) */
.ui-pill--pending,
.ui-pill--info {
  background-color: var(--brand-secondary-50);
  color: var(--brand-secondary-600);
}

/* Error — rose */
.ui-pill--error,
.ui-pill--danger {
  background-color: var(--status-rose-50);
  color: var(--status-rose-600);
}

/* Banned — dark rose */
.ui-pill--banned {
  background-color: var(--status-rose-50);
  color: var(--status-rose-800);
}

/* Logged out — neutral */
.ui-pill--logged_out,
.ui-pill--neutral {
  background-color: var(--neutral-200);
  color: var(--neutral-700);
}

/* ------------------------------------------------------------------ */
/* App shell: left sidebar (accounts) + main pane                      */
/* ------------------------------------------------------------------ */
.ui-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  grid-template-rows: 1fr;
  height: 100vh;
  overflow: hidden;
}

.ui-shell__main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background-color: var(--color-bg);
  overflow: hidden;
}

.ui-sidebar {
  background-color: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
}

.ui-sidebar__brand {
  padding: 1rem 1.25rem;
  font-weight: 700;
  font-size: var(--font-size-base);
  color: var(--brand-700);
  border-bottom: 1px solid var(--color-border);
  letter-spacing: -0.01em;
}

.ui-sidebar__brand a { color: inherit; text-decoration: none; }

.ui-sidebar__section-title {
  padding: 0.75rem 1.25rem 0.25rem;
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

.ui-sidebar__list {
  flex: 1;
  overflow-y: auto;
  list-style: none;
  margin: 0;
  padding: 0.25rem 0 0.5rem;
}

.ui-sidebar__item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 1.25rem;
  color: var(--color-text);
  text-decoration: none;
  font-size: var(--font-size-sm);
  border-left: 3px solid transparent;
}

.ui-sidebar__item:hover {
  background-color: var(--neutral-50);
  text-decoration: none;
}

.ui-sidebar__item.is-active {
  background-color: var(--brand-50);
  border-left-color: var(--brand-500);
  color: var(--brand-800);
  font-weight: 600;
}

.ui-sidebar__avatar {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--brand-100);
  color: var(--brand-700);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.ui-sidebar__label {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.ui-sidebar__label-name {
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ui-sidebar__label-sub {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ui-sidebar__footer {
  border-top: 1px solid var(--color-border);
  padding: 0.75rem 1rem;
}

/* ------------------------------------------------------------------ */
/* Page header inside main pane                                        */
/* ------------------------------------------------------------------ */
.ui-page {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.ui-page__header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.ui-page__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: 0;
}

.ui-page__subtitle {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.ui-page__body {
  flex: 1;
  min-height: 0;
  padding: 1.25rem 1.5rem 2rem;
  overflow-y: auto;
}

.ui-toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.ui-toolbar .ui-input { flex: 1; max-width: 360px; }

/* ------------------------------------------------------------------ */
/* Chat list                                                           */
/* ------------------------------------------------------------------ */
.ui-chats {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2);
  background-color: var(--color-surface);
  overflow: hidden;
}

.ui-chats__row {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  gap: 0.85rem;
  align-items: center;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  color: var(--color-text);
}

.ui-chats__row:last-child { border-bottom: 0; }
.ui-chats__row:hover { background-color: var(--neutral-50); text-decoration: none; }
.ui-chats__row.is-active { background-color: var(--brand-50); }

.ui-chats__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--brand-100);
  color: var(--brand-700);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.ui-chats__name {
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ui-chats__sub {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ui-chats__meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-align: right;
}

/* ------------------------------------------------------------------ */
/* Chat thread (messages bubbles)                                      */
/* ------------------------------------------------------------------ */
.ui-chat {
  display: grid;
  grid-template-columns: 1fr 320px;
  min-height: calc(100vh - 56px);
}

.ui-chat__main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background-color: var(--neutral-50);
}

.ui-chat__header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-shrink: 0;
}

.ui-chat__header-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--brand-100);
  color: var(--brand-700);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.ui-chat__header-name { font-weight: 600; }
.ui-chat__header-sub { font-size: var(--font-size-xs); color: var(--color-text-muted); }

.ui-chat__body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.ui-msg {
  max-width: 70%;
  padding: 0.5rem 0.75rem;
  border-radius: 0.65rem;
  font-size: var(--font-size-sm);
  line-height: 1.4;
  word-wrap: break-word;
  white-space: pre-wrap;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}

.ui-msg__meta {
  font-size: 10px;
  color: var(--color-text-muted);
  margin-top: 0.2rem;
  text-align: right;
}

.ui-msg__sender {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--brand-700);
  margin-bottom: 0.15rem;
}

.ui-msg--in {
  align-self: flex-start;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
}

.ui-msg--out {
  align-self: flex-end;
  background-color: var(--brand-100);
  border: 1px solid var(--brand-200);
}

.ui-msg--media {
  font-style: italic;
  color: var(--color-text-muted);
}

.ui-msg__date-sep {
  align-self: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: var(--neutral-100);
  border: 1px solid var(--color-border);
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  margin: 0.6rem 0;
}

/* Right-side contact panel */
.ui-contact-panel {
  border-left: 1px solid var(--color-border);
  background-color: var(--color-surface);
  padding: 1.25rem;
  overflow-y: auto;
}

.ui-contact-panel__avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background-color: var(--brand-100);
  color: var(--brand-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
  margin: 0 auto 0.75rem;
}

.ui-contact-panel__name {
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
}

.ui-contact-panel__sub {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: 1rem;
}

.ui-contact-panel__row {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 0.5rem;
  padding: 0.4rem 0;
  font-size: var(--font-size-sm);
  border-top: 1px solid var(--color-border);
}

.ui-contact-panel__row > :first-child { color: var(--color-text-muted); }

@media (max-width: 1100px) {
  .ui-chat { grid-template-columns: 1fr; }
  .ui-contact-panel { display: none; }
}

@media (max-width: 780px) {
  .ui-shell { grid-template-columns: 1fr; }
  .ui-sidebar { display: none; }
}

/* ------------------------------------------------------------------ */
/* Sidebar row with hover-delete                                       */
/* ------------------------------------------------------------------ */
.ui-sidebar__row {
  position: relative;
  list-style: none;
}

.ui-sidebar__row:hover .ui-sidebar__delete,
.ui-sidebar__delete:focus-visible {
  opacity: 1;
}

.ui-sidebar__delete {
  position: absolute;
  top: 50%;
  right: 0.5rem;
  transform: translateY(-50%);
  border: 0;
  background: transparent;
  color: var(--color-text-muted);
  font-size: 18px;
  line-height: 1;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  transition: opacity 120ms ease, background-color 120ms ease, color 120ms ease;
}

.ui-sidebar__delete:hover {
  background-color: var(--status-rose-50);
  color: var(--status-rose-600);
}

/* ------------------------------------------------------------------ */
/* Right-click context menu                                            */
/* ------------------------------------------------------------------ */
.ui-context-menu {
  position: fixed;
  z-index: 1000;
  min-width: 180px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  padding: 0.3rem;
}

.ui-context-menu__item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.45rem 0.65rem;
  border: 0;
  background: transparent;
  border-radius: var(--radius-1);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  cursor: pointer;
}

.ui-context-menu__item:hover {
  background-color: var(--neutral-100);
}

.ui-context-menu__item--danger { color: var(--status-rose-600); }
.ui-context-menu__item--danger:hover { background-color: var(--status-rose-50); }

.ui-context-menu__separator {
  height: 1px;
  background-color: var(--color-border);
  margin: 0.3rem 0;
}

/* ------------------------------------------------------------------ */
/* Confirmation dialog                                                 */
/* ------------------------------------------------------------------ */
.ui-dialog {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-3);
  padding: 0;
  background-color: var(--color-surface);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.18);
  max-width: 480px;
  width: calc(100% - 2rem);
  color: var(--color-text);
}

.ui-dialog::backdrop {
  background-color: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(2px);
}

.ui-dialog__form {
  padding: 1.5rem 1.5rem 1.25rem;
}

.ui-dialog__title {
  margin: 0 0 0.5rem;
  font-size: var(--font-size-xl);
  font-weight: 600;
}

.ui-dialog__lead {
  margin: 0 0 0.5rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.ui-dialog__list {
  margin: 0 0 1rem;
  padding-left: 1.1rem;
  font-size: var(--font-size-sm);
}

.ui-dialog__list li { margin: 0.2rem 0; }

.ui-dialog__list strong { color: var(--color-text); }

.ui-dialog code {
  background-color: var(--neutral-100);
  padding: 0.05rem 0.4rem;
  border-radius: var(--radius-1);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: var(--font-size-xs);
}

.ui-dialog__actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* ------------------------------------------------------------------ */
/* Message bubble media                                                */
/* ------------------------------------------------------------------ */
.ui-msg__media-wrap {
  margin: 0.25rem 0 0.4rem;
}

.ui-msg__img {
  display: block;
  max-width: 100%;
  max-height: 360px;
  border-radius: var(--radius-2);
  border: 1px solid var(--color-border);
  cursor: zoom-in;
}

.ui-msg__video,
.ui-msg__audio {
  display: block;
  max-width: 100%;
  border-radius: var(--radius-2);
}

.ui-msg__video { max-height: 360px; }
.ui-msg__audio { width: 100%; min-width: 240px; }

.ui-msg__file {
  display: inline-block;
  padding: 0.35rem 0.55rem;
  background-color: var(--neutral-100);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  text-decoration: none;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ui-msg__file:hover {
  background-color: var(--neutral-200);
  text-decoration: none;
}

/* ------------------------------------------------------------------ */
/* Thumbnail fallback + improved file chip                             */
/* ------------------------------------------------------------------ */
.ui-msg__img--thumb {
  filter: blur(0.5px);
  opacity: 0.92;
  position: relative;
}

.ui-msg__media-caption {
  font-size: 11px;
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: 0.15rem;
  line-height: 1.3;
}

.ui-msg__file {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.5rem;
  align-items: center;
  padding: 0.4rem 0.65rem;
  background-color: var(--neutral-100);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  text-decoration: none;
  max-width: 100%;
  min-width: 240px;
}

.ui-msg__file:hover {
  background-color: var(--neutral-200);
  text-decoration: none;
}

.ui-msg__file--disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.ui-msg__file--disabled:hover {
  background-color: var(--neutral-100);
}

.ui-msg__file-icon {
  font-size: 22px;
  line-height: 1;
}

.ui-msg__file-name {
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.ui-msg__file-meta {
  font-size: 11px;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* ------------------------------------------------------------------ */
/* Overview stats                                                      */
/* ------------------------------------------------------------------ */
.ui-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.ui-stat {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow-sm);
}

.ui-stat__value {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--brand-700);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.ui-stat__total {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: var(--font-size-xl);
}

.ui-stat__label {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-top: 0.35rem;
}

.ui-table__num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ------------------------------------------------------------------ */
/* Chats shell: left list + right thread                               */
/* ------------------------------------------------------------------ */
.ui-chats-shell {
  flex: 1;
  display: grid;
  grid-template-columns: 360px 1fr;
  min-width: 0;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg);
  overflow: hidden;
}

.ui-chats-shell__list {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--color-border);
  background-color: var(--color-surface);
  min-height: 0;
  overflow: hidden;
}

.ui-chats-shell__toolbar {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

.ui-chats-shell__list .ui-chats {
  border: 0;
  border-radius: 0;
  flex: 1;
  overflow-y: auto;
  background: transparent;
}

.ui-chats__row.is-active {
  background-color: var(--brand-50);
  border-left: 3px solid var(--brand-500);
  padding-left: calc(1rem - 3px);
}

.ui-chats-shell__thread {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background-color: var(--neutral-50);
  overflow: hidden;
}

.ui-chats-shell__thread .ui-chat__main {
  min-height: 0;
}

/* sentinel sentinel elements for infinite scroll */
.ui-chats__sentinel,
.ui-thread__sentinel {
  display: block;
  text-align: center;
  font-size: 11px;
  color: var(--color-text-muted);
  padding: 0.6rem;
  border-top: 1px dashed var(--color-border);
}

.ui-thread__sentinel {
  border-top: 0;
  border-bottom: 1px dashed var(--color-border);
}

.ui-thread__sentinel--loading::before,
.ui-chats__sentinel--loading::before {
  content: '⟳ ';
  animation: spin 1s linear infinite;
  display: inline-block;
}

@keyframes spin { to { transform: rotate(360deg); } }

.ui-thread-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.ui-thread-empty__icon {
  font-size: 48px;
  opacity: 0.4;
}

/* HTML [hidden] attribute is overridden by tag/class display:* rules below —
   force it to hide so toggling thread-pane via .hidden = true actually works. */
[hidden] { display: none !important; }

/* Override standalone chat layout for inline thread inside the shell */
.ui-chats-shell__thread .ui-chat {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 300px;
  min-height: 0;
}

@media (max-width: 1100px) {
  .ui-chats-shell__thread .ui-chat { grid-template-columns: 1fr; }
  .ui-chats-shell__thread .ui-contact-panel { display: none; }
}

@media (max-width: 880px) {
  .ui-chats-shell { grid-template-columns: 1fr; }
  .ui-chats-shell__list { display: none; }
}

/* ------------------------------------------------------------------ */
/* Auth + project picker                                              */
/* ------------------------------------------------------------------ */
.ui-auth-body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg);
  padding: 1.5rem;
}

.ui-auth-card {
  width: 100%;
  max-width: 420px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-3);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.ui-auth-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin: 0 0 0.4rem;
  color: var(--brand-700);
}

.ui-auth-subtitle {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin: 0 0 1.25rem;
}

.ui-auth-form {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.ui-auth-error {
  margin-top: 0.5rem;
  padding: 0.5rem 0.65rem;
  background-color: var(--status-rose-50);
  color: var(--status-rose-600);
  border-radius: var(--radius-2);
  font-size: var(--font-size-sm);
}

.ui-project-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.ui-project-list__item {
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2);
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease;
}

.ui-project-list__item:hover {
  background-color: var(--neutral-50);
  border-color: var(--neutral-400);
}

.ui-project-list__item.is-active {
  border-color: var(--brand-500);
  background-color: var(--brand-50);
}

.ui-project-list__title {
  font-weight: 600;
}

.ui-project-list__sub {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: 0.15rem;
}

/* ------------------------------------------------------------------ */
/* Sidebar header — current project + user                             */
/* ------------------------------------------------------------------ */
.ui-sidebar__project {
  padding: 0.6rem 1.25rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ui-sidebar__project-name {
  font-weight: 600;
  font-size: var(--font-size-sm);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ui-sidebar__project-switch {
  font-size: var(--font-size-xs);
  color: var(--color-link);
  text-decoration: none;
  flex-shrink: 0;
}

.ui-sidebar__user {
  padding: 0.5rem 1.25rem;
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ui-sidebar__user a { color: var(--color-link); text-decoration: none; }

/* ------------------------------------------------------------------ */
/* Reply quote block inside message bubble                             */
/* ------------------------------------------------------------------ */
.ui-msg__quote {
  display: block;
  margin: 0 0 0.3rem;
  padding: 0.35rem 0.55rem 0.35rem 0.65rem;
  border-left: 3px solid var(--brand-500);
  background-color: rgba(20, 184, 166, 0.08);
  border-radius: 0.25rem;
  cursor: pointer;
  max-width: 100%;
}

.ui-msg__quote:hover {
  background-color: rgba(20, 184, 166, 0.16);
}

.ui-msg__quote--out {
  border-left-color: var(--brand-700);
}

.ui-msg__quote-sender {
  font-size: 11px;
  font-weight: 600;
  color: var(--brand-700);
  margin-bottom: 0.1rem;
}

.ui-msg__quote-body {
  font-size: 12px;
  color: var(--color-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  white-space: normal;
}

.ui-msg--highlight {
  animation: msg-highlight 1.5s ease;
}

@keyframes msg-highlight {
  0%   { box-shadow: 0 0 0 3px var(--brand-300); }
  100% { box-shadow: 0 0 0 0 var(--brand-300); }
}

/* Links inside message bubbles & reply quotes */
.ui-msg__link {
  color: var(--brand-700);
  text-decoration: underline;
  text-decoration-color: rgba(15, 118, 110, 0.4);
  word-break: break-word;
}
.ui-msg__link:hover { text-decoration-color: var(--brand-700); }
.ui-msg--out .ui-msg__link { color: var(--brand-800); }

/* ------------------------------------------------------------------ */
/* Bulk-select bar + chat row checkbox                                 */
/* ------------------------------------------------------------------ */
.ui-chats-shell__bulkbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background-color: var(--brand-50);
  border-bottom: 1px solid var(--brand-200);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--brand-800);
  flex-shrink: 0;
}

.ui-chats-shell__bulkbar > span:first-child { flex: 1; }

/* Adjust row grid to fit checkbox before avatar */
.ui-chats-shell__list .ui-chats__row {
  grid-template-columns: 22px 44px 1fr auto;
}

.ui-chats__check {
  margin: 0;
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--brand-600);
}

/* ------------------------------------------------------------------ */
/* Group-chat indicator: avatar badge + tiny chip                      */
/* ------------------------------------------------------------------ */
.ui-chats__avatar { position: relative; }

.ui-chats__avatar--group::after {
  content: '👥';
  position: absolute;
  bottom: -3px;
  right: -3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  line-height: 1;
  pointer-events: none;
}

.ui-chats__chip {
  display: inline-block;
  padding: 0 0.4rem;
  margin-right: 0.3rem;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--brand-800);
  background-color: var(--brand-100);
  border-radius: 999px;
  vertical-align: middle;
  line-height: 1.6;
}