:root {
  color-scheme: var(--tg-color-scheme, light dark);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  --page-bg: var(--tg-theme-bg-color, #f2f4f7);
  --surface: var(--tg-theme-secondary-bg-color, #ffffff);
  --text: var(--tg-theme-text-color, #111827);
  --muted: var(--tg-theme-hint-color, #6b7280);
  --accent: var(--tg-theme-button-color, #2481cc);
  --accent-text: var(--tg-theme-button-text-color, #ffffff);
  --link: var(--tg-theme-link-color, #2481cc);
  --danger: var(--tg-theme-destructive-text-color, #d93838);
  --border: color-mix(in srgb, var(--muted) 25%, transparent);
  --focus: color-mix(in srgb, var(--accent) 35%, transparent);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--page-bg);
}

body {
  min-width: 280px;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  background: var(--page-bg);
  color: var(--text);
}

button,
textarea {
  font: inherit;
}

.app-shell {
  width: min(100%, 720px);
  margin: 0 auto;
  padding: max(18px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right))
    max(24px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
}

.app-header,
.answer-header,
.composer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.app-header {
  margin-bottom: 18px;
}

h1,
h2 {
  margin: 0;
  line-height: 1.15;
}

h1 {
  font-size: clamp(26px, 8vw, 34px);
  letter-spacing: -0.035em;
}

h2 {
  font-size: 18px;
}

.model-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
  color: var(--link);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.credit-balance {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 6px 10px;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--border));
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
  text-align: center;
}

.composer,
.answer-card {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: 0 8px 28px rgb(0 0 0 / 5%);
}

.composer {
  padding: 16px;
}

.composer label {
  display: block;
  margin-bottom: 10px;
  font-size: 15px;
  font-weight: 700;
}

textarea {
  display: block;
  width: 100%;
  min-height: 156px;
  resize: vertical;
  padding: 13px 14px;
  border: 1px solid var(--border);
  border-radius: 13px;
  outline: none;
  background: var(--page-bg);
  color: var(--text);
  line-height: 1.45;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

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

textarea:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--focus);
}

textarea:disabled {
  opacity: 0.7;
}

.composer-footer {
  margin-top: 12px;
}

.character-count,
.status {
  color: var(--muted);
  font-size: 13px;
}

.button {
  position: relative;
  min-height: 48px;
  border: 0;
  border-radius: 13px;
  padding: 12px 18px;
  cursor: pointer;
  font-weight: 750;
  touch-action: manipulation;
  transition: opacity 120ms ease, transform 120ms ease;
}

.button:active:not(:disabled) {
  transform: scale(0.98);
}

.button:focus-visible {
  outline: 4px solid var(--focus);
  outline-offset: 2px;
}

.button:disabled {
  cursor: wait;
  opacity: 0.62;
}

.button-primary {
  min-width: 124px;
  background: var(--accent);
  color: var(--accent-text);
}

.button-spinner {
  display: none;
  width: 18px;
  height: 18px;
  margin: 0 auto;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}

.is-busy .button-label {
  display: none;
}

.is-busy .button-spinner {
  display: block;
}

.status,
.error-message {
  margin: 12px 3px 0;
}

.error-message {
  padding: 12px 14px;
  border: 1px solid color-mix(in srgb, var(--danger) 35%, transparent);
  border-radius: 12px;
  background: color-mix(in srgb, var(--danger) 8%, var(--surface));
  color: var(--danger);
  font-size: 14px;
  line-height: 1.4;
}

.answer-card {
  margin-top: 16px;
  padding: 17px;
}

.model-badge {
  background: color-mix(in srgb, var(--accent) 20%, var(--surface));
  color: var(--text);
}

.answer-text {
  margin-top: 14px;
  overflow-wrap: anywhere;
  white-space: normal;
  line-height: 1.55;
}

.answer-text.is-plain-text {
  white-space: pre-wrap;
}

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

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

.answer-text h1,
.answer-text h2,
.answer-text h3,
.answer-text h4,
.answer-text h5,
.answer-text h6 {
  margin: 1.15em 0 0.45em;
  line-height: 1.28;
  letter-spacing: -0.015em;
}

.answer-text h1 {
  font-size: 1.3rem;
}

.answer-text h2 {
  font-size: 1.18rem;
}

.answer-text h3 {
  font-size: 1.08rem;
}

.answer-text h4,
.answer-text h5,
.answer-text h6 {
  font-size: 1rem;
}

.answer-text p,
.answer-text ul,
.answer-text ol,
.answer-text pre,
.answer-text blockquote,
.answer-text table {
  margin: 0.75em 0;
}

.answer-text ul,
.answer-text ol {
  padding-inline-start: 1.45em;
}

.answer-text li + li {
  margin-top: 0.3em;
}

.answer-text li > p {
  margin: 0.3em 0;
}

.answer-text a {
  color: var(--link);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.15em;
}

.answer-text blockquote {
  padding: 0.15em 0 0.15em 0.85em;
  border-left: 3px solid color-mix(in srgb, var(--accent) 55%, var(--border));
  color: var(--muted);
}

.answer-text code {
  padding: 0.12em 0.32em;
  border-radius: 6px;
  background: color-mix(in srgb, var(--muted) 14%, transparent);
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
}

.answer-text pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 13px 14px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: color-mix(in srgb, var(--muted) 10%, var(--page-bg));
  white-space: pre;
  -webkit-overflow-scrolling: touch;
}

.answer-text pre code {
  padding: 0;
  border-radius: 0;
  background: transparent;
  font-size: 0.86em;
}

.answer-text hr {
  margin: 1.1em 0;
  border: 0;
  border-top: 1px solid var(--border);
}

.answer-text table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  -webkit-overflow-scrolling: touch;
}

.answer-text th,
.answer-text td {
  padding: 8px 10px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.answer-text th {
  background: color-mix(in srgb, var(--muted) 10%, transparent);
}

.manuals {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.manuals h3,
.manuals p {
  margin: 0;
}

.manuals h3 {
  font-size: 1rem;
}

.manuals p {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

.manual-list {
  display: grid;
  gap: 9px;
  margin-top: 12px;
}

.manual-button {
  width: 100%;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--border));
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--text);
  font: inherit;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.manual-button:disabled {
  cursor: wait;
  opacity: 0.6;
}

[hidden] {
  display: none !important;
}

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

@media (min-width: 600px) {
  .app-shell {
    padding-top: 34px;
  }

  .composer,
  .answer-card {
    padding: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}