:root {
  --page: #ffffff;
  --panel: #f7f7f8;
  --panel-strong: #ececee;
  --text: #202123;
  --muted: #6e6e73;
  --border: #dedee3;
  --button: #202123;
  --button-text: #ffffff;
  --danger: #a13d32;
  --shadow: 0 16px 48px rgb(0 0 0 / 16%);
  --content-width: 48rem;
  --drawer-width: 21.5rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #212121;
    --panel: #2f2f2f;
    --panel-strong: #3b3b3b;
    --text: #ececec;
    --muted: #b4b4b4;
    --border: #494949;
    --button: #ececec;
    --button-text: #212121;
    --danger: #f09a8e;
    --shadow: 0 16px 48px rgb(0 0 0 / 42%);
  }
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.access-pending .app {
  visibility: hidden;
}

body {
  background: var(--page);
  color: var(--text);
  font: 16px/1.55 ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-text-size-adjust: 100%;
}

button,
textarea,
input {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
  border-radius: 8px;
}

/* App frame */

.app {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  width: 100%;
  height: 100dvh;
  background: var(--page);
}

.topbar {
  z-index: 2;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 48px;
  align-items: center;
  min-height: calc(56px + env(safe-area-inset-top));
  padding: env(safe-area-inset-top) 8px 0;
  background: color-mix(in srgb, var(--page) 94%, transparent);
  border-bottom: 1px solid var(--border);
}

.title-stack {
  min-width: 0;
  text-align: center;
}

.title-stack h1 {
  margin: 0;
  overflow: hidden;
  font-size: 0.96rem;
  font-weight: 650;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.title-stack span {
  display: block;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.icon-button:hover {
  background: var(--panel);
}

.icon-button svg,
.composer-button svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Conversation */

.transcript {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scroll-behavior: smooth;
  padding: 24px 16px 14px;
}

.transcript > * {
  width: min(100%, var(--content-width));
  margin-right: auto;
  margin-left: auto;
}

.opening {
  display: grid;
  align-content: center;
  justify-items: center;
  min-height: 100%;
  padding: 28px 0 18vh;
  text-align: center;
}

.claude-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
  border-radius: 14px;
  background: var(--text);
  color: var(--page);
  font-size: 1.35rem;
}

.opening-line {
  margin: 0;
  font-size: clamp(1.55rem, 6vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.opening-sub {
  max-width: 30rem;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.msg {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 10px 0;
}

.msg + .msg {
  margin-top: 10px;
}

.msg .who {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 600;
}

.msg .text {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.msg.user {
  align-items: flex-end;
}

.msg.user .who {
  display: none;
}

.msg.user .text {
  max-width: min(85%, 38rem);
  padding: 10px 14px;
  border-radius: 18px 18px 5px;
  background: var(--panel-strong);
}

.msg.assistant .text {
  max-width: 100%;
}

.msg.assistant .text > :first-child {
  margin-top: 0;
}

.msg.assistant .text > :last-child {
  margin-bottom: 0;
}

.msg.assistant .text p,
.msg.assistant .text ul,
.msg.assistant .text ol,
.msg.assistant .text blockquote,
.msg.assistant .text pre,
.msg.assistant .text h3,
.msg.assistant .text h4,
.msg.assistant .text h5 {
  margin: 0.75em 0;
}

.msg.assistant .text ul,
.msg.assistant .text ol {
  padding-left: 1.35em;
}

.msg.assistant .text li + li {
  margin-top: 0.35em;
}

.msg.assistant .text a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.msg.assistant .text code {
  padding: 0.1em 0.3em;
  border-radius: 5px;
  background: var(--panel-strong);
  font: 0.9em/1.45 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.msg.assistant .text pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
}

.msg.assistant .text pre code {
  padding: 0;
  background: transparent;
  white-space: pre;
}

.msg.assistant .text blockquote {
  padding-left: 12px;
  border-left: 3px solid var(--border);
  color: var(--muted);
}

.msg.system .text {
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  color: var(--danger);
}

.msg-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.msg-tools button {
  min-height: 36px;
  padding: 5px 11px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.msg-tools button:hover {
  background: var(--panel);
  color: var(--text);
}

.caret {
  display: inline-block;
  width: 0.5em;
  height: 1.05em;
  margin-left: 2px;
  vertical-align: -0.16em;
  background: var(--muted);
  animation: blink 1.1s steps(2, start) infinite;
}

@keyframes blink {
  to {
    visibility: hidden;
  }
}

/* Composer */

.composer-dock {
  z-index: 2;
  padding: 8px 12px max(8px, env(safe-area-inset-bottom));
  background: linear-gradient(to bottom, transparent, var(--page) 12px);
}

.composer,
.mode-picker {
  width: min(100%, var(--content-width));
  margin: 0 auto;
}

.mode-picker {
  display: flex;
  justify-content: center;
  gap: 3px;
  margin-bottom: 7px;
}

.mode-picker button {
  min-height: 30px;
  padding: 3px 11px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 0.76rem;
  cursor: pointer;
}

.mode-picker button[aria-pressed="true"] {
  background: var(--panel-strong);
  color: var(--text);
  font-weight: 650;
}

.activity {
  margin: -2px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 6px;
  min-height: 54px;
  padding: 5px 6px 5px 16px;
  border: 1px solid var(--border);
  border-radius: 27px;
  background: var(--panel);
}

.composer:focus-within {
  border-color: color-mix(in srgb, var(--text) 42%, var(--border));
}

.composer textarea {
  width: 100%;
  min-height: 42px;
  max-height: 32vh;
  padding: 10px 0 8px;
  resize: none;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  line-height: 1.45;
}

.composer textarea::placeholder {
  color: var(--muted);
}

.composer-actions {
  display: flex;
  align-items: center;
  gap: 2px;
}

.composer-button,
.send {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
}

.composer-button {
  background: transparent;
  color: var(--muted);
}

.composer-button:hover {
  background: var(--panel-strong);
  color: var(--text);
}

.composer-button[aria-pressed="true"] {
  background: var(--danger);
  color: #ffffff;
}

.send {
  background: var(--button);
  color: var(--button-text);
  font-size: 1.35rem;
  font-weight: 650;
  line-height: 1;
}

.send.stopping {
  background: var(--panel-strong);
  color: var(--text);
  font-size: 0.82rem;
}

.send:disabled {
  opacity: 0.32;
  cursor: default;
}

/* Drawer */

dialog {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text);
}

dialog::backdrop {
  background: rgb(0 0 0 / 45%);
  backdrop-filter: blur(1px);
}

.drawer {
  width: min(var(--drawer-width), 90vw);
  max-width: none;
  height: 100dvh;
  max-height: none;
  margin: 0 auto 0 0;
}

.drawer-panel {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  padding: max(10px, env(safe-area-inset-top)) 10px max(10px, env(safe-area-inset-bottom));
  background: var(--panel);
  box-shadow: var(--shadow);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
  padding-left: 8px;
}

.drawer-header h2 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 650;
}

.chat-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 0;
  flex: 1;
  margin: 0;
  padding: 6px 0 12px;
  overflow-y: auto;
  list-style: none;
}

.chat-row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 42px;
  align-items: center;
  border-radius: 10px;
}

.chat-row:has(.chat-choice[aria-current="true"]),
.chat-row:hover {
  background: var(--panel-strong);
}

.chat-choice {
  min-width: 0;
  min-height: 44px;
  padding: 8px 10px;
  overflow: hidden;
  border: 0;
  background: transparent;
  color: var(--text);
  text-align: left;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
}

.chat-choice[aria-current="true"] {
  font-weight: 600;
}

.row-actions {
  position: relative;
}

.row-actions summary {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  list-style: none;
  cursor: pointer;
}

.row-actions summary::-webkit-details-marker {
  display: none;
}

.row-actions summary:hover,
.row-actions[open] summary {
  background: var(--page);
  color: var(--text);
}

.row-actions-menu {
  position: absolute;
  z-index: 4;
  top: 38px;
  right: 0;
  display: flex;
  flex-direction: column;
  min-width: 9rem;
  padding: 5px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--page);
  box-shadow: var(--shadow);
}

.row-actions-menu button {
  min-height: 40px;
  padding: 0 10px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.row-actions-menu button:hover {
  background: var(--panel-strong);
}

.identity-entry {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) 24px;
  align-items: center;
  gap: 10px;
  min-height: 54px;
  padding: 7px 9px;
  border: 0;
  border-top: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.identity-entry:hover {
  background: var(--panel-strong);
}

.identity-avatar {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  background: var(--button);
  color: var(--button-text);
  font-size: 0.84rem;
  font-weight: 700;
}

.identity-entry > span:nth-child(2) {
  overflow: hidden;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.identity-entry svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: var(--muted);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Focused dialogs */

dialog:not(.drawer) {
  width: min(32rem, calc(100vw - 24px));
  max-width: none;
}

.sheet {
  display: flex;
  flex-direction: column;
  gap: 15px;
  max-height: min(86dvh, 42rem);
  padding: 22px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--page);
  box-shadow: var(--shadow);
}

.sheet h2 {
  margin: 0;
  font-size: 1.2rem;
}

.sheet p {
  margin: 0;
}

.sheet-note {
  color: var(--muted);
  font-size: 0.92rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--muted);
  font-size: 0.86rem;
}

.field input {
  min-height: 48px;
  padding: 10px 13px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--panel);
  color: var(--text);
  font-size: 1rem;
}

.field select {
  min-height: 48px;
  padding: 10px 13px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--panel);
  color: var(--text);
  font-size: 1rem;
}

.error {
  color: var(--danger);
  font-size: 0.9rem;
}

.family-code {
  display: block;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel);
  font-size: clamp(2rem, 12vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.18em;
  line-height: 1.2;
  text-align: center;
}

.code-sheet {
  text-align: center;
}

.code-sheet .sheet-actions {
  justify-content: center;
}

.sheet-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.sheet-actions button {
  min-height: 46px;
  padding: 0 17px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

.sheet-actions .primary {
  border-color: var(--button);
  background: var(--button);
  color: var(--button-text);
  font-weight: 600;
}

.sheet-actions .quiet {
  border-color: transparent;
  background: transparent;
  color: var(--muted);
}

.wide-action {
  min-height: 48px;
  border: 0;
  border-radius: 999px;
  background: var(--button);
  color: var(--button-text);
  font-weight: 650;
  cursor: pointer;
}

.legacy-entry {
  min-height: 42px;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.action-dialog {
  width: min(22rem, calc(100vw - 24px));
}

.menu-sheet {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 7px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--page);
  box-shadow: var(--shadow);
}

.menu-sheet h2 {
  margin: 0;
  padding: 12px 12px 8px;
  overflow: hidden;
  font-size: 0.92rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.menu-sheet button {
  min-height: 46px;
  padding: 0 12px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.menu-sheet button:hover {
  background: var(--panel);
}

.danger-action {
  color: var(--danger) !important;
}

.quiet-action {
  margin-top: 3px;
  border-top: 1px solid var(--border) !important;
  border-radius: 0 0 10px 10px !important;
  color: var(--muted) !important;
}

@media (max-width: 520px) {
  dialog:not(.drawer) {
    width: 100%;
    margin: auto 0 0;
  }

  .sheet {
    padding: 22px 18px max(22px, env(safe-area-inset-bottom));
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 22px 22px 0 0;
  }

  .transcript {
    padding-right: 14px;
    padding-left: 14px;
  }

  .action-dialog {
    width: 100%;
    margin: auto 0 0;
  }

  .menu-sheet {
    padding: 7px 7px max(7px, env(safe-area-inset-bottom));
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 18px 18px 0 0;
  }
}

@media (min-width: 900px) {
  .transcript {
    padding-top: 34px;
  }

  .composer-dock {
    padding-bottom: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    animation: none !important;
    transition: none !important;
  }

  .caret {
    visibility: visible;
  }
}