:root {
  --bg: #0b1020;
  --bg2: #131e3d;
  --card: rgba(17, 26, 55, 0.82);
  --text: #eef3ff;
  --muted: #b7c5ea;
  --primary: #7a6dff;
  --border: rgba(160, 182, 255, 0.28);
}

* {
  box-sizing: border-box;
  font-family: Inter, system-ui, -apple-system, sans-serif;
}

/* Logo / product wordmark (Outfit) */
.app-brand .brand-title,
.search-title {
  font-family: Outfit, Inter, system-ui, sans-serif;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background: radial-gradient(circle at 20% 20%, #2b2f80 0%, transparent 35%),
    radial-gradient(circle at 80% 10%, #1d7ea8 0%, transparent 30%),
    linear-gradient(135deg, var(--bg), var(--bg2));
  color: var(--text);
  overflow-x: clip;
}

.bg-glow {
  position: fixed;
  width: 320px;
  height: 320px;
  border-radius: 999px;
  filter: blur(70px);
  pointer-events: none;
}

.bg-glow.one {
  top: -100px;
  left: -90px;
  background: rgba(122, 109, 255, 0.35);
}

.bg-glow.two {
  right: -100px;
  bottom: -120px;
  background: rgba(89, 209, 253, 0.28);
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 28px 18px 40px;
}

/* Private beta / class testing (~20 people) � copy from BETA_MESSAGE or default when BETA_TESTING=1 */
.beta-banner {
  margin-bottom: 14px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 200, 120, 0.4);
  background: linear-gradient(90deg, rgba(255, 186, 92, 0.14), rgba(122, 109, 255, 0.1));
  color: #fff0dd;
  font-size: 13px;
  line-height: 1.45;
  text-align: center;
}

.card {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--card);
  backdrop-filter: blur(10px);
  padding: 18px;
  box-shadow: 0 14px 40px rgba(2, 8, 28, 0.45);
}

#appCard.card {
  padding-bottom: 22px;
}

/* Login screen matches in-app shell (brand, greeting, disclaimer) */
.auth-card {
  padding-bottom: 22px;
}

.auth-head-placeholder {
  visibility: hidden;
  pointer-events: none;
}

.auth-greeting {
  margin-top: 0;
}

.auth-eyebrow {
  margin-top: 6px;
  margin-bottom: 12px;
}

.auth-google-btn {
  display: block;
  width: 100%;
  max-width: 360px;
  padding: 12px 16px;
  font-size: 15px;
}

.auth-status {
  margin-top: 12px;
  margin-bottom: 0;
  min-height: 1.25em;
}

.auth-fine-print {
  margin-top: 20px;
}

.card-lite {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  padding: 14px;
}

.hidden {
  display: none !important;
}

.eyebrow {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #b9c4f5;
}

h1,
h2,
h3,
p {
  margin: 0 0 10px;
}

.muted {
  color: var(--muted);
  font-size: 14px;
}

.primary-btn,
.ghost-btn,
.tab {
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 10px 12px;
  cursor: pointer;
}

.primary-btn {
  background: linear-gradient(120deg, #7a6dff, #4eb5f8);
  color: white;
  font-weight: 700;
}

.ghost-btn,
.tab {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

.head-actions {
  display: flex;
  gap: 8px;
}

.app-head {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 14px;
  margin-bottom: 2px;
}

.app-head-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.app-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: flex;
  flex-shrink: 0;
}

.brand-mark-svg {
  width: 40px;
  height: 40px;
  display: block;
  border-radius: 12px;
  filter: drop-shadow(0 6px 16px rgba(90, 110, 220, 0.4));
}

.brand-wordmark {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  min-width: 0;
}

.brand-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  color: var(--text);
  line-height: 1.15;
}

.brand-hub {
  background: linear-gradient(120deg, #ffffff 0%, #c9d6ff 35%, #7a6dff 70%, #4eb5f8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-kicker {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(183, 197, 234, 0.65);
}

.app-greeting h2,
.auth-signin-title {
  margin-bottom: 4px;
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.app-greeting .app-tagline {
  margin-top: 2px;
  margin-bottom: 0;
}

/* ChatGPT-style bottom disclaimer: small, low-contrast, centered */
.app-fine-print {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  text-align: center;
}

.app-fine-print p {
  margin: 0 auto 6px;
  max-width: 36rem;
  font-size: 11px;
  line-height: 1.45;
  font-weight: 400;
  color: rgba(172, 172, 190, 0.52);
}

.app-fine-print p:last-child {
  margin-bottom: 0;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0;
}

.tab.active {
  border-color: #8f83ff;
  background: rgba(122, 109, 255, 0.2);
}

textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 12px;
  font-size: 14px;
  resize: vertical;
}

.panel {
  margin-top: 8px;
}

.perplexity-panel {
  min-height: 420px;
}

.search-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 28px 8px 8px;
  gap: 10px;
}

.search-title {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, #ffffff, #c9d6ff 40%, #9de6ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.search-bar {
  width: min(100%, 640px);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: stretch;
  gap: 0;
  border-radius: 999px;
  border: 1px solid rgba(160, 182, 255, 0.45);
  background: rgba(6, 10, 28, 0.55);
  box-shadow: 0 12px 40px rgba(5, 12, 40, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

/* Hero search: logo slot + gradient rim (product-style) */
.search-bar--branded {
  border: 1px solid transparent;
  background:
    linear-gradient(rgba(8, 12, 30, 0.88), rgba(8, 12, 30, 0.88)) padding-box,
    linear-gradient(125deg, rgba(122, 109, 255, 0.55), rgba(62, 184, 248, 0.4), rgba(122, 109, 255, 0.35)) border-box;
  box-shadow:
    0 14px 44px rgba(5, 12, 40, 0.42),
    inset 0 1px 0 rgba(255, 255, 255, 0.09),
    0 0 40px rgba(122, 109, 255, 0.08);
}

.search-bar--branded.search-bar--code {
  background:
    linear-gradient(rgba(8, 12, 30, 0.88), rgba(8, 12, 30, 0.88)) padding-box,
    linear-gradient(125deg, rgba(90, 159, 255, 0.5), rgba(122, 109, 255, 0.45)) border-box;
  box-shadow:
    0 14px 44px rgba(5, 12, 40, 0.42),
    inset 0 1px 0 rgba(255, 255, 255, 0.09),
    0 0 36px rgba(90, 159, 255, 0.1);
}

.search-icon--logo {
  width: 54px;
  min-width: 54px;
  padding: 0 8px;
  background: rgba(0, 0, 0, 0.22);
  border-right: 1px solid rgba(160, 182, 255, 0.22);
}

.search-logo-svg {
  width: 28px;
  height: 28px;
  display: block;
  margin: 0 auto;
  filter: drop-shadow(0 2px 10px rgba(90, 120, 255, 0.35));
}

.search-bar.compact {
  border-radius: 16px;
  width: 100%;
  max-width: none;
  /* Hero bar is icon | textarea | button; follow-up has only textarea + Send */
  grid-template-columns: 1fr auto;
  align-items: stretch;
}

.search-bar.compact .search-submit {
  min-width: unset;
  width: auto;
  flex-shrink: 0;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  border-radius: 0 15px 15px 0;
}

.search-bar.compact textarea {
  min-height: 48px;
  border-radius: 15px 0 0 15px;
}

.search-bar textarea {
  border: none;
  border-radius: 0;
  background: transparent;
  resize: none;
  min-height: 52px;
  max-height: 160px;
  padding: 14px 12px;
  font-size: 15px;
  line-height: 1.4;
}

.search-bar textarea:focus {
  outline: none;
}

.search-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  font-size: 13px;
  font-weight: 800;
  color: #b9c8ff;
  background: rgba(255, 255, 255, 0.04);
  border-right: 1px solid rgba(160, 182, 255, 0.2);
}

.search-icon.code-icon {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  letter-spacing: -0.06em;
}

.search-submit {
  border-radius: 0;
  border: none;
  border-left: 1px solid rgba(160, 182, 255, 0.28);
  padding: 0 20px;
  min-width: 96px;
  margin: 0;
}

.search-submit:hover {
  filter: brightness(1.05);
}

.starter-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  max-width: min(100%, 640px);
  margin: 4px 0 0;
  padding: 0 4px;
}

.starter-chip {
  border: 1px solid rgba(160, 182, 255, 0.38);
  background: rgba(255, 255, 255, 0.06);
  color: #dce6ff;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.starter-chip:hover {
  background: rgba(122, 109, 255, 0.22);
  border-color: rgba(180, 200, 255, 0.55);
}

.starter-chip:focus-visible {
  outline: 2px solid rgba(122, 109, 255, 0.75);
  outline-offset: 2px;
}

.starter-chip:active {
  transform: scale(0.98);
}

/* In-thread chips: align with conversation, not centered hero */
.starter-chips--inline {
  justify-content: flex-start;
  max-width: none;
  width: 100%;
  margin-top: 0;
  margin-bottom: 2px;
  padding: 0;
}

.search-hint {
  margin: 0;
  font-size: 12px;
}

.followup-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 4px 0 8px;
}


.answer-shell {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 8px;
}

.followup-bar {
  position: sticky;
  bottom: 0;
  padding-top: 4px;
  background: linear-gradient(180deg, transparent, rgba(11, 16, 32, 0.92) 28%);
}

.followup-meta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 8px;
}

.tiny-btn {
  padding: 6px 10px;
  font-size: 12px;
  border-radius: 999px;
}

.chat-thread {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  padding: 12px;
  min-height: 320px;
  max-height: min(52vh, 520px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.perplexity-thread {
  min-height: 280px;
  max-height: min(56vh, 560px);
  border-radius: 16px;
}

.notebook-thread {
  min-height: 280px;
  max-height: min(60vh, 640px);
}

.msg {
  display: flex;
  width: 100%;
}

.msg.user {
  justify-content: flex-end;
}

.msg.assistant {
  justify-content: flex-start;
  align-items: stretch;
}

.bubble {
  max-width: min(92%, 720px);
  border-radius: 14px;
  padding: 10px 12px;
  border: 1px solid rgba(160, 182, 255, 0.35);
  background: rgba(255, 255, 255, 0.05);
}

.msg.user .bubble {
  width: fit-content;
  max-width: min(92%, 720px);
  margin-left: auto;
  background: linear-gradient(120deg, rgba(122, 109, 255, 0.35), rgba(78, 181, 248, 0.22));
}

/* Assistant replies use full thread width (not a narrow �popup� strip). */
.msg.assistant .bubble {
  width: 100%;
  max-width: 100%;
  flex: 1 1 auto;
  min-width: 0;
  border-color: rgba(120, 200, 255, 0.28);
  background: rgba(255, 255, 255, 0.045);
}

.bubble-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 6px;
}

.bubble-head .bubble-label {
  margin-bottom: 0;
}

.bubble-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #c8d4ff;
  margin-bottom: 6px;
}

.bubble-copy {
  flex-shrink: 0;
  padding: 5px 11px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 8px;
  border: 1px solid rgba(160, 182, 255, 0.35);
  background: rgba(255, 255, 255, 0.06);
  color: #dce6ff;
  cursor: pointer;
}

.bubble-copy:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(180, 200, 255, 0.45);
}

.bubble-copy:focus-visible {
  outline: 2px solid rgba(122, 109, 255, 0.7);
  outline-offset: 2px;
}

.bubble-copy:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.assistant-feedback {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed rgba(160, 182, 255, 0.24);
}

.assistant-feedback-label {
  color: #a8b8e8;
  font-size: 12px;
  margin-right: 2px;
}

.assistant-feedback-btn,
.assistant-feedback-reason {
  border: 1px solid rgba(140, 165, 245, 0.45);
  background: rgba(255, 255, 255, 0.04);
  color: #dce6ff;
  font-size: 12px;
  border-radius: 999px;
  padding: 5px 10px;
  cursor: pointer;
}

.assistant-feedback-btn:hover,
.assistant-feedback-reason:hover {
  background: rgba(122, 109, 255, 0.2);
  border-color: rgba(180, 200, 255, 0.56);
}

.assistant-feedback-status {
  color: #a8b8e8;
  font-size: 12px;
}

.assistant-feedback-reasons {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.bubble-text {
  margin: 0;
  white-space: pre-wrap;
  line-height: 1.45;
  color: #eaf0ff;
  font-size: 14px;
}

.bubble-md {
  white-space: normal;
}

.bubble-md--streaming {
  min-height: 1.25em;
}

.bubble-md > :first-child {
  margin-top: 0;
}

.bubble-md > :last-child {
  margin-bottom: 0;
}

.bubble-md h1,
.bubble-md h2,
.bubble-md h3 {
  margin: 0.85em 0 0.4em;
  font-weight: 700;
  line-height: 1.25;
  color: #f2f6ff;
}

.bubble-md h1 {
  font-size: 1.25rem;
}

.bubble-md h2 {
  font-size: 1.1rem;
}

.bubble-md h3 {
  font-size: 1rem;
}

.bubble-md p {
  margin: 0.55em 0;
}

.bubble-md ul,
.bubble-md ol {
  margin: 0.5em 0;
  padding-left: 1.35em;
}

.bubble-md li {
  margin: 0.25em 0;
}

.bubble-md a {
  color: #9de6ff;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.bubble-md a:hover {
  color: #c8f0ff;
}

.bubble-md hr {
  border: none;
  border-top: 1px solid rgba(160, 182, 255, 0.35);
  margin: 1em 0;
}

.bubble-md blockquote {
  margin: 0.65em 0;
  padding: 0.35em 0 0.35em 12px;
  border-left: 3px solid rgba(122, 109, 255, 0.85);
  color: var(--muted);
}

.bubble-md table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.65em 0;
  font-size: 13px;
}

.bubble-md th,
.bubble-md td {
  border: 1px solid rgba(160, 182, 255, 0.35);
  padding: 6px 8px;
  text-align: left;
}

.bubble-md th {
  background: rgba(255, 255, 255, 0.06);
}

.bubble-md pre {
  margin: 0.65em 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(160, 182, 255, 0.22);
  overflow-x: auto;
  line-height: 1.45;
}

.bubble-md code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.9em;
}

.bubble-md :not(pre) > code {
  padding: 0.12em 0.4em;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(160, 182, 255, 0.2);
}

.upload-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 10px 0;
}

.upload-row input[type="file"] {
  flex: 1;
  min-width: 220px;
  font-size: 13px;
  color: var(--muted);
}

.settings-modal {
  position: fixed;
  inset: 0;
  background: rgba(3, 8, 24, 0.62);
  display: grid;
  place-items: center;
  padding: 16px;
  z-index: 60;
}

.settings-card {
  width: min(100%, 520px);
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(13, 20, 45, 0.98);
  box-shadow: 0 22px 48px rgba(3, 8, 24, 0.52);
  padding: 14px;
}

.settings-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.settings-grid {
  display: grid;
  gap: 10px;
}

.settings-grid label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: #cfdcff;
}

.settings-grid select {
  border: 1px solid rgba(160, 182, 255, 0.35);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  color: #eaf0ff;
  padding: 8px 10px;
}

.settings-checkbox {
  display: flex !important;
  align-items: center;
  gap: 8px;
}

.settings-actions {
  margin-top: 12px;
  display: flex;
  justify-content: flex-end;
}

.toast-stack {
  position: fixed;
  right: 14px;
  bottom: 14px;
  display: grid;
  gap: 8px;
  z-index: 70;
}

.toast {
  max-width: min(92vw, 340px);
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid rgba(160, 182, 255, 0.35);
  background: rgba(12, 18, 38, 0.96);
  color: #eaf0ff;
  font-size: 13px;
}

.notebook-hint {
  margin-top: 4px;
}

.actions {
  margin: 10px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Phones / small tablets */
@media (max-width: 640px) {
  .container {
    padding-left: max(14px, env(safe-area-inset-left, 0px));
    padding-right: max(14px, env(safe-area-inset-right, 0px));
    padding-top: max(12px, env(safe-area-inset-top, 0px));
    padding-bottom: max(28px, env(safe-area-inset-bottom, 0px));
  }

  /* Logged-in: full-height column, edge-to-edge shell (ChatGPT / Google mobile-style) */
  .container:has(#appCard:not(.hidden)) {
    padding-left: max(0px, env(safe-area-inset-left, 0px));
    padding-right: max(0px, env(safe-area-inset-right, 0px));
    padding-top: max(0px, env(safe-area-inset-top, 0px));
    padding-bottom: max(0px, env(safe-area-inset-bottom, 0px));
    min-height: 100dvh;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
  }

  .container:has(#appCard:not(.hidden)) #betaBanner:not(.hidden) {
    margin-left: max(12px, env(safe-area-inset-left, 0px));
    margin-right: max(12px, env(safe-area-inset-right, 0px));
    margin-bottom: 6px;
    flex-shrink: 0;
  }

  .container:has(#appCard:not(.hidden)) #appCard.card {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
    border-radius: 0;
    border-left: none;
    border-right: none;
    margin: 0;
    width: 100%;
    max-width: none;
    padding-left: max(12px, env(safe-area-inset-left, 0px));
    padding-right: max(12px, env(safe-area-inset-right, 0px));
    padding-top: max(6px, env(safe-area-inset-top, 0px));
    padding-bottom: max(4px, env(safe-area-inset-bottom, 0px));
    box-shadow: none;
    background: linear-gradient(
      180deg,
      rgba(13, 17, 36, 0.98) 0%,
      rgba(11, 16, 32, 1) 45%,
      rgba(10, 14, 28, 1) 100%
    );
  }

  .container:has(#appCard:not(.hidden)) #appCard .app-head {
    gap: 6px;
    flex-shrink: 0;
  }

  .container:has(#appCard:not(.hidden)) #appCard .app-greeting .app-tagline {
    display: none;
  }

  .container:has(#appCard:not(.hidden)) #appCard .app-greeting h2 {
    font-size: 1.05rem;
    margin-bottom: 0;
  }

  .container:has(#appCard:not(.hidden)) #appCard .tabs {
    margin-top: 4px;
    margin-bottom: 6px;
    flex-shrink: 0;
  }

  .container:has(#appCard:not(.hidden)) #appCard .app-fine-print {
    margin-top: auto;
    padding-top: 10px;
    flex-shrink: 0;
    border-top-color: rgba(255, 255, 255, 0.05);
  }

  .container:has(#appCard:not(.hidden)) #appCard .app-fine-print p {
    font-size: 10px;
    line-height: 1.35;
  }

  .beta-banner {
    padding-left: max(10px, env(safe-area-inset-left, 0px));
    padding-right: max(10px, env(safe-area-inset-right, 0px));
  }

  .card {
    padding: 14px;
  }

  .app-head-top {
    flex-wrap: wrap;
    gap: 10px;
  }

  #logoutBtn {
    min-height: 44px;
    min-width: 44px;
    padding: 10px 14px;
  }

  .tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
  }

  .tab {
    min-height: 44px;
    font-size: 14px;
    text-align: center;
  }

  .search-hero {
    padding: 18px 0 4px;
  }

  /* Empty state: hero fills most of the screen (Google-style landing) */
  #appCard .perplexity-panel .search-hero {
    flex: 1 1 auto;
    justify-content: center;
    min-height: min(52dvh, 560px);
    padding-top: 24px;
    padding-bottom: 24px;
  }

  .search-title {
    font-size: 1.2rem;
    line-height: 1.2;
  }

  /* Stack hero search: icon, field, CTA (avoids squashed 3-col on narrow screens) */
  .search-bar:not(.compact) {
    display: grid;
    grid-template-columns: 1fr;
    border-radius: 16px;
  }

  .search-bar:not(.compact) .search-icon--logo,
  .search-bar:not(.compact) .search-icon {
    width: 100%;
    min-width: 0;
    min-height: 48px;
    padding: 10px 12px;
    border-right: none;
    border-bottom: 1px solid rgba(160, 182, 255, 0.22);
  }

  .search-bar:not(.compact) textarea {
    min-height: 52px;
    /* 16px+ stops iOS Safari from zooming the page on focus */
    font-size: 16px;
  }

  .search-bar:not(.compact) .search-submit {
    width: 100%;
    min-height: 48px;
    border-left: none;
    border-top: 1px solid rgba(160, 182, 255, 0.28);
    border-radius: 0 0 15px 15px;
  }

  /*
   * Follow-up composers use .search-bar.compact only inside .followup-bar.
   * Keep them as one horizontal pill (field | Send) like the hero search bar,
   * not a stacked block.
   */
  .followup-bar .search-bar.compact {
    grid-template-columns: 1fr auto;
    align-items: stretch;
    border-radius: 999px;
    border: 1px solid transparent;
    background:
      linear-gradient(rgba(8, 12, 30, 0.92), rgba(8, 12, 30, 0.92)) padding-box,
      linear-gradient(125deg, rgba(122, 109, 255, 0.55), rgba(62, 184, 248, 0.42), rgba(122, 109, 255, 0.35))
        border-box;
    box-shadow:
      0 14px 40px rgba(5, 12, 40, 0.42),
      inset 0 1px 0 rgba(255, 255, 255, 0.09),
      0 0 36px rgba(122, 109, 255, 0.08);
    overflow: hidden;
  }

  .followup-bar .search-bar.compact textarea {
    min-height: 52px;
    font-size: 16px;
    padding: 14px 14px 14px 18px;
    border-radius: 0;
  }

  .followup-bar .search-bar.compact .search-submit {
    width: auto;
    min-width: 92px;
    min-height: 52px;
    border-left: 1px solid rgba(160, 182, 255, 0.28);
    border-top: none;
    border-radius: 0;
    padding: 0 18px;
  }

  /* Ask/Code/Notebook: main panel eats remaining viewport under tabs */
  #appCard .app-head,
  #appCard .tabs {
    flex-shrink: 0;
  }

  #appCard .panel:not(.hidden) {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
  }

  /* Chat/Code: scroll lives inside the thread, not the whole page */
  #appCard #panelChat:not(.hidden),
  #appCard #panelCode:not(.hidden) {
    overflow: hidden;
  }

  #appCard #panelNotebook:not(.hidden) {
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  #appCard .answer-shell {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 2px;
  }

  #appCard .answer-shell .chat-thread.perplexity-thread {
    flex: 1 1 0;
    min-height: 0;
    max-height: none;
    border: 1px solid transparent;
    background:
      linear-gradient(rgba(10, 14, 32, 0.94), rgba(10, 14, 32, 0.94)) padding-box,
      linear-gradient(130deg, rgba(122, 109, 255, 0.38), rgba(62, 184, 248, 0.28), rgba(122, 109, 255, 0.25))
        border-box;
    box-shadow:
      0 14px 44px rgba(5, 12, 40, 0.4),
      inset 0 1px 0 rgba(255, 255, 255, 0.06);
  }

  #appCard .followup-bar {
    flex-shrink: 0;
    position: relative;
    background: linear-gradient(180deg, transparent 0%, rgba(11, 16, 32, 0.88) 45%);
  }

  .primary-btn,
  .ghost-btn:not(.auth-head-placeholder) {
    min-height: 44px;
    touch-action: manipulation;
  }

  .starter-chip {
    min-height: 40px;
    padding: 10px 14px;
  }

  .followup-bar {
    padding-bottom: max(6px, env(safe-area-inset-bottom, 0px));
  }

  /* Notebook (no answer-shell): keep a bounded scroll area */
  .notebook-thread,
  #panelNotebook .chat-thread {
    max-height: min(58dvh, 620px);
    min-height: 220px;
    -webkit-overflow-scrolling: touch;
  }

  .chat-thread,
  .perplexity-thread {
    min-height: 220px;
    -webkit-overflow-scrolling: touch;
  }

  .chat-thread {
    padding: 10px;
  }

  .msg.assistant .bubble {
    padding: 12px 14px;
    border-radius: 16px;
  }

  .bubble-copy {
    min-height: 36px;
    padding: 8px 12px;
  }

  .upload-row input[type="file"] {
    min-width: 0;
    flex: 1 1 100%;
  }

  .upload-row .primary-btn {
    flex: 1 1 auto;
    width: 100%;
  }

  .brand-title {
    font-size: 1.05rem;
  }

  .brand-kicker {
    font-size: 9px;
    letter-spacing: 0.1em;
  }

  .perplexity-panel {
    min-height: 0;
  }
}

pre {
  margin: 0;
  white-space: pre-wrap;
  line-height: 1.45;
  color: #dce7ff;
}