:root {
  --bg: #dce0e8;
  --surface: #e6e9ef;
  --surface-alt: #eff1f5;
  --fg: #4c4f69;
  --muted: #5c5f77;
  --border: #bcc0cc;
  --accent: #fe640b;
  --accent-contrast: #eff1f5;
  --focus: #fe640b;
  --bubble-assistant-bg: #fe640b;
  --bubble-assistant-fg: #eff1f5;
  --bubble-user-bg: #40a02b;
  --bubble-user-fg: #eff1f5;
  --r: 4px;

  --base-font-size: 1.25rem;
  --type-scale-ratio: 1.15;
  --step--2: calc(var(--base-font-size) / (var(--type-scale-ratio) * var(--type-scale-ratio)));
  --step--1: calc(var(--base-font-size) / var(--type-scale-ratio));
  --step-0: var(--base-font-size);
  --step-1: calc(var(--step-0) * var(--type-scale-ratio));
  --step-2: calc(var(--step-1) * var(--type-scale-ratio));
  --step-3: calc(var(--step-2) * var(--type-scale-ratio));
  --step-4: calc(var(--step-3) * var(--type-scale-ratio));
  --step-5: calc(var(--step-4) * var(--type-scale-ratio));

  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11111b;
    --surface: #181825;
    --surface-alt: #1e1e2e;
    --fg: #cdd6f4;
    --muted: #bac2de;
    --border: #45475a;
    --accent: #fab387;
    --accent-contrast: #11111b;
    --focus: #fab387;
    --bubble-assistant-bg: #fab387;
    --bubble-assistant-fg: #11111b;
    --bubble-user-bg: #a6e3a1;
    --bubble-user-fg: #11111b;
  }
}

html[data-theme='light'] {
  --bg: #dce0e8;
  --surface: #e6e9ef;
  --surface-alt: #eff1f5;
  --fg: #4c4f69;
  --muted: #5c5f77;
  --border: #bcc0cc;
  --accent: #fe640b;
  --accent-contrast: #eff1f5;
  --focus: #fe640b;
  --bubble-assistant-bg: #fe640b;
  --bubble-assistant-fg: #eff1f5;
  --bubble-user-bg: #40a02b;
  --bubble-user-fg: #eff1f5;
  color-scheme: light;
}

html[data-theme='dark'] {
  --bg: #11111b;
  --surface: #181825;
  --surface-alt: #1e1e2e;
  --fg: #cdd6f4;
  --muted: #bac2de;
  --border: #45475a;
  --accent: #fab387;
  --accent-contrast: #11111b;
  --focus: #fab387;
  --bubble-assistant-bg: #fab387;
  --bubble-assistant-fg: #11111b;
  --bubble-user-bg: #a6e3a1;
  --bubble-user-fg: #11111b;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

html {
  font-size: 100%;
}

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--fg);
  font-size: var(--step-0);
  line-height: 1.5;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  line-height: 1.15;
  letter-spacing: -0.01rem;
  text-wrap: balance;
}

h1 {
  font-size: var(--step-5);
}

h2 {
  font-size: var(--step-4);
}

h3 {
  font-size: var(--step-3);
}

h4 {
  font-size: var(--step-2);
}

h5 {
  font-size: var(--step-1);
}

h6 {
  font-size: var(--step-0);
}

.app {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.statusbar {
  height: 1rem;
  min-height: 1rem;
  max-height: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0 0.5rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.75rem;
  line-height: 1rem;
}

.statusbar-logo {
  color: var(--fg);
  text-decoration: none;
  font-weight: 700;
}

.statusbar-logo:hover {
  text-decoration: underline;
}

.statusbar-count {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.statusbar-right {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.statusbar-theme {
  width: 0.85rem;
  height: 0.85rem;
  padding: 0;
  border: 0;
  border-radius: 2px;
  background: transparent;
  color: var(--muted);
  display: grid;
  place-items: center;
  cursor: pointer;
}

.statusbar-theme:hover {
  color: var(--fg);
  background: transparent;
}

.statusbar-theme svg {
  width: 0.68rem;
  height: 0.68rem;
}

.panel {
  border: 0;
  background: transparent;
  border-radius: 0;
  overflow: visible;
}

.panel-inner {
  padding: 0.9rem 0.9rem 1rem;
}

.hidden {
  display: none !important;
}

.h {
  margin: 0 0 0.7rem 0;
  font-size: var(--step-2);
  letter-spacing: 0.01rem;
}

.form {
  display: grid;
  gap: 0.55rem;
}

.lab {
  font-size: var(--step--2);
}

.err {
  min-height: 1.1rem;
  font-size: var(--step--2);
}

.link {
  align-self: center;
  font-size: var(--step--2);
  color: var(--fg);
  text-decoration: underline;
}

.threadsbar {
  display: flex;
  align-items: flex-end;
  gap: 0.35rem;
  padding: 0.45rem 0.9rem 0;
  border-bottom: 1px solid var(--border);
}

.thread-tabs {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: flex-end;
  gap: 0.3rem;
  overflow-x: auto;
  overflow-y: hidden;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-gutter: stable both-edges;
}

.thread-tabs::-webkit-scrollbar {
  height: 0.35rem;
}

.thread-tab {
  flex: 0 0 auto;
  min-width: 7rem;
  max-width: 14rem;
  border: 1px solid var(--border);
  border-bottom: 0;
  border-radius: var(--r) var(--r) 0 0;
  padding: 0 0.35rem;
  height: 1.7rem;
  display: flex;
  align-items: center;
  background: var(--surface-alt);
  cursor: pointer;
  margin-bottom: -1px;
}

.thread-tab.active {
  border-color: var(--fg);
  background: var(--bg);
}

.thread-title {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--fg);
  padding: 0;
  margin: 0;
  height: 100%;
  font: inherit;
  font-size: var(--step--2);
  line-height: 1.2;
  outline: none;
}

.thread-btn {
  height: 1.7rem;
  min-width: 1.8rem;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: transparent;
  color: var(--fg);
  padding: 0 0.5rem;
  font-size: var(--step--2);
  font-weight: 600;
  cursor: pointer;
}

.thread-btn:hover {
  background: var(--surface-alt);
}

.thread-mode-wrap {
  position: relative;
}

.thread-mode-btn {
  height: 1.7rem;
  min-width: 3.2rem;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: transparent;
  color: var(--fg);
  padding: 0 0.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.22rem;
  cursor: pointer;
}

.thread-mode-btn svg {
  width: 0.9rem;
  height: 0.9rem;
  flex: 0 0 auto;
}

.thread-mode-label {
  font-size: 0.62rem;
  line-height: 1;
  letter-spacing: 0.02em;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  text-transform: uppercase;
}

.thread-mode-btn:hover {
  background: var(--surface-alt);
}

.thread-mode-btn:disabled {
  color: var(--muted);
  cursor: not-allowed;
}

.thread-mode-menu {
  position: absolute;
  top: calc(100% + 0.3rem);
  right: 0;
  z-index: 30;
  min-width: 6.5rem;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--surface);
  padding: 0.15rem;
  display: grid;
  gap: 0.1rem;
}

.thread-mode-item {
  width: 100%;
  height: 1.55rem;
  border: 0;
  border-radius: calc(var(--r) - 1px);
  background: transparent;
  color: var(--fg);
  text-align: left;
  font-size: var(--step--2);
  font-weight: 500;
  padding: 0 0.4rem;
}

.thread-mode-item:hover {
  background: var(--surface-alt);
}

.thread-mode-item.active {
  font-weight: 700;
  position: relative;
  padding-right: 1.2rem;
}

.thread-mode-item.active::after {
  content: '✓';
  position: absolute;
  right: 0.45rem;
  top: 50%;
  transform: translateY(-50%);
}

@media (max-width: 42rem) {
  .thread-tab {
    min-width: 6rem;
    max-width: 11rem;
  }
}

.messages {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 0.9rem 0.9rem 0.7rem;
  display: flex;
  flex-direction: column;
  gap: 0.22rem;
  font-size: var(--step--1);
}

.msg {
  width: 100%;
  line-height: 1.4;
  color: var(--fg);
}

.msg-nick {
  display: inline;
  font-weight: 700;
  margin-right: 0.4rem;
}

.msg-content {
  display: inline;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.msg.assistant .msg-nick {
  color: var(--bubble-assistant-bg);
}

.msg.user .msg-nick {
  color: var(--bubble-user-bg);
}

.msg.thinking {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.loader {
  width: 1rem;
  aspect-ratio: 1;
  border-radius: 50%;
  color: var(--bubble-assistant-bg);
  background: currentColor;
  box-shadow: 0 0 0 0 currentColor;
  animation: pulse-dot 1s infinite;
}

@keyframes pulse-dot {
  100% {
    box-shadow: 0 0 0 1.5rem 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-width: 0;
}

.meta {
  margin-top: 0.35rem;
  font-size: var(--step--2);
}

.composer {
  border-top: 1px solid var(--border);
  padding: 0.7rem 0.9rem 0.9rem;
  background: transparent;
}

textarea {
  width: 100%;
  resize: none;
  min-height: 0;
  max-height: none;
  padding: 0.55rem 0.55rem;
  border-radius: var(--r);
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: var(--fg);
  outline: none;
  line-height: 1.35;
  font: inherit;
}

input {
  width: 100%;
  height: 2.2rem;
  padding: 0 0.55rem;
  border-radius: var(--r);
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: var(--fg);
  outline: none;
  font: inherit;
}

textarea:focus,
input:focus,
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.row {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.55rem;
  flex-wrap: wrap;
}

button {
  height: 2.2rem;
  padding: 0 0.7rem;
  border-radius: var(--r);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--fg);
  cursor: pointer;
  font-weight: 700;
  font-size: var(--step--2);
  letter-spacing: 0.01rem;
}

button:hover {
  background: var(--surface-alt);
}

button:disabled {
  cursor: not-allowed;
  border-style: dashed;
}

button:disabled:hover {
  background: var(--surface);
  color: var(--muted);
}

.ghost {
  font-weight: 700;
}

.icon {
  width: 2.2rem;
  padding: 0;
  display: grid;
  place-items: center;
}

.icon svg {
  width: 1.1rem;
  height: 1.1rem;
}

#view-chat {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}