:root {
  --bg: #fafafa;
  --panel: #ffffff;
  --border: #e4e4e7;
  --text: #18181b;
  --muted: #71717a;
  --accent: #ff4d4d;
  --accent-bg: #ffd9d9;
  --danger: #b91c1c;
  --preview: #a1a1aa;
  --agent: #ca8a04;
  --agent-own-bg: #fff4f4;
  --agent-own-border: #ff4d4d;
  --agent-other-bg: #f4f4f5;
  --agent-other-border: #d4d4d8;
  --active-bg: #ffd9d9;
  --hover: #f4f4f5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #09090b;
    --panel: #18181b;
    --border: #27272a;
    --text: #fafafa;
    --muted: #a1a1aa;
    --accent: #ff6b6b;
    --accent-bg: #4c1d1d;
    --danger: #f87171;
    --preview: #52525b;
    --agent: #fbbf24;
    --agent-own-bg: #3f1515;
    --agent-own-border: #ff6b6b;
    --agent-other-bg: #27272a;
    --agent-other-border: #52525b;
    --active-bg: #4c1d1d;
    --hover: #27272a;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  width: 100%;
  overflow-x: hidden;
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
}
button:hover:not(:disabled) {
  background: var(--accent);
  color: #fff;
}
button:disabled { opacity: 0.5; cursor: default; }
button.danger {
  color: var(--danger);
  border-color: var(--danger);
}
button.danger:hover:not(:disabled) {
  background: var(--danger);
  color: #fff;
}
button.filled {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
button.filled:hover:not(:disabled) { filter: brightness(0.92); background: var(--accent); color: #fff; }

input, textarea {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  width: 100%;
}

/* Auth -------------------------------------------------------------------- */

.auth-page {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--bg);
}
.auth-left {
  display: grid;
  place-items: center;
  padding: 0 48px;
  min-width: 0;
}
.auth-main {
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
  padding: 32px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.auth-title {
  margin: 0;
  font-size: 64px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-style: italic;
  color: var(--accent);
}
.auth-tag {
  margin: 0 0 16px;
  font-size: 18px;
  color: var(--muted);
  line-height: 1.4;
}
.auth-form {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
}
.auth-form label {
  display: block;
  margin: 12px 0 4px;
  font-size: 13px;
  color: var(--muted);
}
.auth-form .row {
  margin-top: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
.auth-form .error { color: var(--danger); margin-top: 12px; font-size: 13px; }
.auth-form .notice { color: var(--accent); margin-top: 12px; font-size: 13px; }
.auth-form .switch {
  background: none;
  border: none;
  color: var(--accent);
  padding: 0;
  cursor: pointer;
}
.auth-form .switch:hover { text-decoration: underline; background: none; }

.auth-right {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: grid;
  place-items: center;
  padding: 24px;
}
.auth-tagline {
  width: 90%;
  max-width: 720px;
  height: auto;
  opacity: 0.98;
}

@media (max-width: 640px) {
  .auth-page { grid-template-columns: 1fr; }
  .auth-right { display: none; }
  .auth-left { padding: 0 24px; }
  .auth-title { font-size: 44px; }
  .auth-tag { font-size: 15px; }
}

/* App shell --------------------------------------------------------------- */

.app {
  display: grid;
  grid-template-columns: 260px 1fr;
  /* 100dvh adapts to the real viewport on iOS Safari et al., where the
     address bar eats into 100vh and pushes the composer off-screen. */
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  position: relative;
}
.app.sidebar-hidden { grid-template-columns: 1fr; }
.app.sidebar-hidden > .sidebar { display: none; }

/* Sidebar ----------------------------------------------------------------- */

.sidebar {
  border-right: 1px solid var(--border);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.sidebar .brand-bar {
  background: var(--accent);
  color: #fff;
  padding: 12px 16px;
  min-height: 53px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex: 0 0 auto;
  border-bottom: 1px solid var(--accent);
}
.sidebar .brand {
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-style: italic;
  color: #fff;
  line-height: 1;
}
.sidebar .brand-bar .sidebar-close {
  background: none;
  border: none;
  color: #fff;
  padding: 2px 6px;
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
  flex: 0 0 auto;
}
.sidebar .brand-bar .sidebar-close:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
.sidebar .actions {
  padding: 8px;
  display: flex;
  gap: 6px;
  border-bottom: 1px solid var(--border);
  flex: 0 0 auto;
}
.sidebar .actions button { flex: 1; }

.sidebar .new-conv-panel {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  border-bottom: 1px solid transparent;
  transition: max-height 0.2s ease, opacity 0.2s ease, border-color 0.2s ease;
  flex: 0 0 auto;
}
.sidebar .new-conv-panel.open {
  max-height: 200px;
  opacity: 1;
  border-bottom-color: var(--border);
}
.sidebar .new-conv-form {
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.sidebar .new-conv-form .actions {
  padding: 0;
  border-bottom: none;
}
.sidebar .convs {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
}
.sidebar .conv {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.sidebar .conv:hover { background: var(--hover); }
.sidebar .conv.active { background: var(--active-bg); }
.sidebar .conv .title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sidebar .conv .unread {
  background: var(--accent);
  color: white;
  border-radius: 999px;
  padding: 1px 7px;
  font-size: 11px;
}
.sidebar .conv.archived .title { color: var(--muted); font-style: italic; }

/* Main pane (shared) ------------------------------------------------------ */

.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  height: 100%;
}
.main .empty {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  padding: 24px;
  text-align: center;
}
.main .header {
  padding: 12px 16px;
  /* Reserve room at the right for the fixed top-right widgets
     (user pill + language button) so header buttons don't slide under. */
  padding-right: 240px;
  min-height: 53px;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 8px;
  align-items: center;
  flex: 0 0 auto;
  background: var(--panel);
}
.main .header .title-wrap {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}
.main .header .title {
  font-weight: 600;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.main .header .title-btn {
  flex: 1;
  min-width: 0;
  background: none;
  border: none;
  padding: 0;
  text-align: left;
  cursor: pointer;
  color: inherit;
  display: flex;
  align-items: baseline;
  gap: 4px;
  overflow: hidden;
}
.main .header .title-btn:hover { background: none; }
.main .header .title-btn:hover .title { text-decoration: underline; }
.main .header .viewers { color: var(--muted); font-size: 12px; }
.main .header .archived-tag { color: var(--muted); font-size: 12px; }

.menu-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1.2;
  color: var(--muted);
}
.menu-toggle:hover {
  background: var(--hover);
  color: var(--accent);
  border-color: var(--accent);
}
.app:not(.sidebar-hidden) .menu-toggle { display: none; }

/* Top-right: user widget + language switcher ------------------------------ */

#top-right {
  position: fixed;
  top: 8px;
  right: 8px;
  z-index: 1000;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
#user-widget {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  backdrop-filter: blur(4px);
}
#user-widget:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(255, 255, 255, 1);
}
@media (prefers-color-scheme: dark) {
  #user-widget { background: rgba(24, 24, 27, 0.85); }
  #user-widget:hover { background: var(--panel); }
}

/* Shown while the SSE stream is trying to reconnect. Amber to signal
   degraded state without reading as an error. */
.reconnecting-pill {
  align-self: center;
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fcd34d;
  border-radius: 9999px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
}
@media (prefers-color-scheme: dark) {
  .reconnecting-pill {
    background: rgba(120, 53, 15, 0.5);
    color: #fde68a;
    border-color: rgba(252, 211, 77, 0.5);
  }
}

#lang-switcher {
  position: relative;
}
.lang-btn {
  background: rgba(255, 255, 255, 0.85);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  backdrop-filter: blur(4px);
}
.lang-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(255, 255, 255, 1);
}
@media (prefers-color-scheme: dark) {
  .lang-btn { background: rgba(24, 24, 27, 0.85); }
  .lang-btn:hover { background: var(--panel); }
}
.lang-menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
  display: flex;
  flex-direction: column;
  min-width: 70px;
  overflow: hidden;
}
.lang-item {
  background: none;
  color: var(--text);
  border: none;
  border-radius: 0;
  padding: 6px 14px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
}
.lang-item:hover { background: var(--hover); color: var(--accent); }
.lang-item.active { color: var(--accent); }

.icon-btn {
  background: none;
  border: none;
  padding: 0 4px;
  cursor: pointer;
  font-size: 13px;
  line-height: 1;
}
.icon-btn:hover { opacity: 0.7; }

/* Chat view --------------------------------------------------------------- */

.participants {
  padding: 8px 16px;
  display: flex;
  flex-wrap: nowrap;
  gap: 6px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  font-size: 12px;
  flex: 0 0 auto;
  overflow-x: auto;
  overflow-y: hidden;
  white-space: nowrap;
}
.participants .p {
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}
.participants .p { cursor: pointer; }
.participants .p:hover { filter: brightness(0.96); }
.participants .p.agent.own {
  background: var(--agent-own-bg);
  border-color: var(--agent-own-border);
}
.participants .p.agent.other {
  background: var(--agent-other-bg);
  border-color: var(--agent-other-border);
}
.participants .p.user.viewing {
  border-color: var(--accent);
  border-width: 2px;
  padding: 1px 7px;
}
.participants .p .status { font-size: 11px; padding: 0 2px; }

.participants .add-agent-pill {
  position: sticky;
  right: 0;
  margin-left: auto;
  padding: 2px 10px;
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  cursor: pointer;
  flex: 0 0 auto;
  /* Extend background under any scrolled-past pills so it never looks
     half-covered when the bar overflows horizontally. */
  box-shadow: -8px 0 8px -4px var(--bg);
}
.participants .add-agent-pill:hover:not(:disabled) {
  filter: brightness(0.92);
  background: var(--accent);
  color: #fff;
}

.messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 12px 16px;
  /* Standard chat trick: reverse the flex direction so scrollTop=0 is the
     visual bottom. New messages and growing content (images decoding,
     agent stream chunks) keep the user pinned to the bottom automatically.
     Rendering code reverses the message array so DOM order stays newest-
     first, which column-reverse then flips visually to oldest-first. */
  display: flex;
  flex-direction: column-reverse;
  overflow-anchor: none;
}
.message {
  margin-bottom: 10px;
  padding: 6px 10px;
  border-radius: 8px;
}
.message .meta {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 2px;
}
.message .meta .name { font-weight: 600; color: var(--text); }
.message.agent .meta .name { color: var(--agent); }
.message .body { white-space: pre-wrap; word-wrap: break-word; }
/* Generic 10-line clamp — used for both message bodies and agent prompts. */
.clamp {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 10;
  overflow: hidden;
}
.message .body a { color: var(--accent); text-decoration: underline; word-break: break-all; }
.message .body a:hover { filter: brightness(0.88); }
.message.preview .body { color: var(--preview); font-style: italic; }
.read-more {
  margin-top: 4px;
  padding: 0;
  background: none;
  border: 0;
  color: var(--accent);
  cursor: pointer;
  font: inherit;
  font-size: 0.9em;
}
.read-more:hover { filter: brightness(0.88); }
.message .files { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 8px; }
.message .files img {
  max-width: 240px;
  max-height: 240px;
  border-radius: 6px;
  border: 1px solid var(--border);
  display: block;
}
.message .files .file-ref { text-decoration: none; }
.message .files .file-card {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-bg);
  border: 1px solid var(--accent);
  border-radius: 6px;
}
.message .files .file-ref:hover .file-card { filter: brightness(0.95); }

.composer {
  border-top: 1px solid var(--border);
  padding: 10px;
  background: var(--panel);
  flex: 0 0 auto;
  position: relative;
}

.mention-menu {
  display: none;
  position: absolute;
  bottom: calc(100% - 1px);
  left: 10px;
  right: 10px;
  max-width: 320px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.15);
  max-height: 220px;
  overflow-y: auto;
  z-index: 5;
}
.mention-menu.open { display: block; }
.mention-item { padding: 8px 12px; cursor: pointer; }
.mention-item:hover { background: var(--hover); }
.mention-item.selected { background: var(--accent-bg); }
.composer .queued-files {
  display: flex;
  gap: 8px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}
.composer .queued-files .file {
  padding: 2px 8px;
  font-size: 12px;
  background: var(--accent-bg);
  border-radius: 4px;
  display: inline-flex;
  gap: 4px;
  align-items: center;
}
.composer .queued-files .file button {
  padding: 0 4px;
  background: none;
  border: none;
  color: var(--muted);
}
.composer .row { display: flex; gap: 8px; align-items: stretch; }
.composer .row > button {
  min-height: 36px;
  padding: 0 14px;
}
.composer textarea {
  flex: 1;
  resize: none;
  min-height: 36px;
  max-height: 200px;
}
.composer input[type="file"] { display: none; }

/* Agents view ------------------------------------------------------------- */

.agents-pane {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.agent-form {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.agent-form h3 { margin: 0 0 4px; font-size: 14px; }
.agents-list { display: flex; flex-direction: column; gap: 8px; }
.agent-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
}
.agent-card .name { font-weight: 600; }
.agent-card .desc { color: var(--muted); font-size: 13px; margin-top: 4px; white-space: pre-wrap; }
.agent-card .actions { margin-top: 8px; display: flex; gap: 6px; }

/* Modals ------------------------------------------------------------------ */

.modal-bg {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}
.modal {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  min-width: 360px;
  max-width: 560px;
  max-height: 80vh;
  overflow-y: auto;
}
.modal h2 { margin-top: 0; font-size: 16px; }
.modal .row { margin: 12px 0; }
.modal .actions { margin-top: 16px; display: flex; gap: 8px; justify-content: flex-end; flex-wrap: wrap; }
.modal .muted { color: var(--muted); font-size: 13px; margin: 8px 0 0; }

.conv-settings-form {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.conv-settings-form label { color: var(--muted); font-size: 13px; }
.conv-settings-form .actions { margin-top: 8px; justify-content: flex-start; }

/* Mobile ------------------------------------------------------------------ */

@media (max-width: 640px) {
  /* iOS Safari zooms in when focusing inputs with font-size < 16px, which
     leaves the page rendered at the zoomed scale. 16px blocks the auto-zoom. */
  input, textarea, select, button { font-size: 16px; }
  .lang-btn { font-size: 14px; }

  .app, .app.sidebar-hidden {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: 85%;
    max-width: 320px;
    z-index: 100;
    box-shadow: 2px 0 16px rgba(0, 0, 0, 0.3);
    transform: translateX(0);
    transition: transform 0.2s ease;
  }
  .app.sidebar-hidden > .sidebar {
    display: flex; /* override desktop hide */
    transform: translateX(-100%);
    box-shadow: none;
  }
  .app:not(.sidebar-hidden)::after {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 99;
    pointer-events: none;
  }

  .main .header {
    padding: 8px 10px;
    padding-right: 180px;
    flex-wrap: nowrap;
    overflow-x: auto;
  }
  #user-widget { max-width: 100px; padding: 4px 8px; font-size: 13px; }
  /* Hide the viewers count on narrow screens to keep the header short. */
  .main .header .viewers { display: none; }
  .participants { padding: 4px 10px; }
  .messages { padding: 8px 10px; }
  .composer { padding: 6px 8px; }
  .composer .row > button { min-height: 40px; padding: 0 12px; }
  .composer textarea { min-height: 40px; max-height: 120px; }

  .modal {
    min-width: 0;
    width: calc(100vw - 32px);
    max-width: 100%;
    padding: 16px;
  }
  .agents-pane { padding: 12px; }
}

.profile-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  gap: 16px;
}
.profile-row:last-of-type { border-bottom: none; }
.profile-row .label { color: var(--muted); flex: 0 0 auto; }

.prompt-block, .posture-block {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.prompt-block .label, .posture-block .label {
  color: var(--muted);
  margin-bottom: 6px;
}
.prompt-block .prompt-text {
  white-space: pre-wrap;
  word-wrap: break-word;
  margin: 0;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
}

.radios {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
label.radio {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}
label.radio input { width: auto; }

label.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 13px;
}
label.checkbox input { width: auto; }