:root {
  color-scheme: dark;
  --bg: #1f1e1d;
  --bg-2: #262624;
  --surface: rgba(255, 255, 255, 0.055);
  --surface-strong: rgba(255, 255, 255, 0.1);
  --surface-solid: #2b2a28;
  --border: rgba(255, 255, 255, 0.11);
  --border-strong: rgba(255, 255, 255, 0.2);
  --text: #f4f1ea;
  --muted: #c4c0b6;
  --muted-2: #928f86;
  --accent: #d97757;
  --accent-strong: #e08a6c;
  --accent-soft: rgba(217, 119, 87, 0.16);
  --agent: #30302e;
  --user: #d97757;
  --user-text: #20140f;
  --success: #7dd3c7;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  --shadow-soft: 0 14px 36px rgba(0, 0, 0, 0.32);
  --radius-card: 28px;
  --radius-bubble: 24px;
  --radius-control: 16px;
  --radius-chip: 999px;
  --max-width: 1120px;
  --font-sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: Geist, Inter, sans-serif;
  --font-user: var(--font-sans);
  --font-answer: var(--font-sans);
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --ambient-a: var(--accent);
  --ambient-b: var(--success);
  --ambient-opacity: 0.2;
  --user-radius: var(--radius-bubble);
  --agent-border: var(--border);
  --agent-shadow: var(--shadow-soft);
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #1f1e1d;
  --bg-2: #262624;
  --surface: rgba(255, 255, 255, 0.055);
  --surface-strong: rgba(255, 255, 255, 0.1);
  --surface-solid: #2b2a28;
  --border: rgba(255, 255, 255, 0.11);
  --border-strong: rgba(255, 255, 255, 0.2);
  --text: #f4f1ea;
  --muted: #c4c0b6;
  --muted-2: #928f86;
  --accent: #d97757;
  --accent-strong: #e08a6c;
  --accent-soft: rgba(217, 119, 87, 0.16);
  --agent: #30302e;
  --user: #d97757;
  --user-text: #20140f;
  --success: #7dd3c7;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  --shadow-soft: 0 14px 36px rgba(0, 0, 0, 0.32);
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f7f4ed;
  --bg-2: #fffaf1;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-strong: #ffffff;
  --surface-solid: #ffffff;
  --border: rgba(75, 62, 42, 0.16);
  --border-strong: rgba(75, 62, 42, 0.28);
  --text: #211b13;
  --muted: #685c4c;
  --muted-2: #8a7d6a;
  --accent: #8f5f1f;
  --accent-strong: #6f4614;
  --accent-soft: rgba(143, 95, 31, 0.12);
  --agent: #ffffff;
  --user: #2f261b;
  --user-text: #fffaf1;
  --success: #0f766e;
  --shadow: 0 24px 70px rgba(70, 54, 27, 0.12);
  --shadow-soft: 0 12px 30px rgba(70, 54, 27, 0.1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 10%, color-mix(in srgb, var(--accent) 24%, transparent), transparent 25rem),
    radial-gradient(circle at 84% 12%, rgba(125, 211, 199, 0.16), transparent 30rem),
    linear-gradient(145deg, var(--bg), var(--bg-2));
  font-family: var(--font-sans);
  line-height: 1.5;
  overflow-x: hidden;
}

:root body,
[data-theme="dark"] body {
  background:
    radial-gradient(circle at 15% 10%, color-mix(in srgb, var(--accent) 20%, transparent), transparent 26rem),
    radial-gradient(circle at 84% 12%, rgba(217, 119, 87, 0.1), transparent 30rem),
    linear-gradient(145deg, var(--bg), var(--bg-2));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.32;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(to bottom, black, transparent 76%);
}

.ambient {
  position: fixed;
  border-radius: 999px;
  filter: blur(58px);
  opacity: var(--ambient-opacity);
  pointer-events: none;
  z-index: 0;
  animation: ambientFloat 18s ease-in-out infinite alternate;
}
.ambient-one { width: 22rem; height: 22rem; left: -8rem; top: 12rem; background: var(--ambient-a); }
.ambient-two { width: 20rem; height: 20rem; right: -7rem; bottom: 8rem; background: var(--ambient-b); animation-delay: -6s; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
main { display: block; position: relative; z-index: 1; }

:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 3px;
}

.container {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(22px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border: 1px solid var(--border);
  border-top: 0;
  border-radius: 0 0 24px 24px;
  box-shadow: var(--shadow-soft);
  padding: 0.45rem 0.75rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 74px;
  padding: 0 0.35rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 190px;
  flex: 1;
}

.nav-avatar {
  width: 2.85rem;
  height: 2.85rem;
  border-radius: 18px;
  object-fit: cover;
  object-position: center top;
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-soft);
  flex: 0 0 auto;
}

.brand-copy { min-width: 0; }
.brand-copy strong {
  display: block;
  font-size: 1rem;
  letter-spacing: -0.04em;
}
.brand-copy small {
  display: block;
  max-width: 15rem;
  color: var(--muted);
  font-size: 0.78rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-links,
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.cli-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 42px;
  padding: 0.36rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-chip);
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-soft);
  font-weight: 800;
  font-size: 0.86rem;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}
.cli-switch:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--success) 70%, var(--border));
}
.cli-switch-glyph {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--success);
}
@media (max-width: 760px) {
  .nav-actions .cli-switch { display: none; }
}

.nav-links a,
.mobile-nav a {
  padding: 0.58rem 0.7rem;
  border-radius: var(--radius-control);
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.nav-links a:hover,
.mobile-nav a:hover,
.nav-links a.is-active,
.mobile-nav a.is-active {
  color: var(--text);
  background: var(--surface);
}

.nav-cli-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
  color: var(--success) !important;
  border: 1px solid color-mix(in srgb, var(--success) 45%, var(--border));
  font-family: var(--font-mono);
  font-weight: 700 !important;
  letter-spacing: -0.01em;
}
.nav-cli-link:hover {
  background: color-mix(in srgb, var(--success) 16%, transparent) !important;
  border-color: var(--success);
}

.model-chip,
.theme-toggle,
.menu-toggle,
.ghost-button,
.composer button {
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-soft);
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.model-chip:hover,
.theme-toggle:hover,
.menu-toggle:hover,
.ghost-button:hover,
.composer button:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent) 68%, var(--border));
}

.model-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 42px;
  padding: 0.36rem 0.72rem;
  text-align: left;
  border-radius: var(--radius-chip);
  background:
    linear-gradient(var(--surface), var(--surface)) padding-box,
    linear-gradient(145deg, color-mix(in srgb, var(--accent) 55%, transparent), color-mix(in srgb, var(--success) 45%, transparent)) border-box;
}
.model-chip strong,
.model-chip small { display: block; line-height: 1.08; }
.model-chip strong { font-size: 0.86rem; }
.model-chip small { color: var(--muted); font-size: 0.7rem; margin-top: 0.15rem; }
.model-dot {
  width: 0.58rem;
  height: 0.58rem;
  border-radius: 999px;
  background: var(--success);
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--success) 18%, transparent);
}

.theme-toggle {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border-radius: 999px;
  overflow: hidden;
}

.theme-glyph {
  width: 18px;
  height: 18px;
  border-radius: 999px;
  display: block;
  background: var(--text);
  box-shadow: inset -6px -5px 0 0 var(--surface);
  transition: transform 220ms ease, box-shadow 220ms ease, background 220ms ease;
}
[data-theme="light"] .theme-glyph { background: var(--accent); box-shadow: 0 0 0 6px var(--accent-soft); transform: scale(0.78); }

.menu-toggle {
  width: 42px;
  height: 42px;
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 0 10px;
}
.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: var(--text);
}

.mobile-nav {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
  padding: 0.35rem 0.35rem 0.85rem;
}
.mobile-nav.open { display: grid; }

.chat-stage {
  padding: 2rem 0 3.5rem;
}

.intro-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.5rem;
  align-items: stretch;
  margin: 0.75rem 0 1.25rem;
  padding: 1.15rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: color-mix(in srgb, var(--surface) 78%, transparent);
  box-shadow: var(--shadow-soft);
}

.eyebrow,
.toolbar-kicker,
.message-meta {
  display: block;
  color: var(--accent-strong);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.intro-copy h1 {
  margin: 0.12rem 0 0.45rem;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 7vw, 5.6rem);
  line-height: 0.92;
  letter-spacing: -0.08em;
}
.intro-copy p {
  max-width: 52rem;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.18rem);
}

.static-resume-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: 1rem;
  padding: 0.62rem 1rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-chip);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 800;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}
.static-resume-link:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent) 68%, var(--border));
  background: var(--surface-strong);
}
.static-resume-glyph {
  width: 0.92rem;
  height: 0.92rem;
  border-radius: 4px;
  border: 2px solid var(--accent-strong);
  position: relative;
  flex: 0 0 auto;
}
.static-resume-glyph::after {
  content: "";
  position: absolute;
  inset: 3px 3px auto 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent-strong);
  box-shadow: 0 3px 0 var(--accent-strong);
}

.identity-card {
  display: inline-flex;
  align-self: center;
  align-items: center;
  justify-content: center;
  gap: 0;
  min-width: 0;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--surface);
}
/* Desktop identity card shows the profile photo only. */
.identity-card > div { display: none; }
.identity-card img {
  width: 9.5rem;
  height: 9.5rem;
  border-radius: 18px;
  object-fit: cover;
  object-position: center top;
  border: 1px solid var(--border-strong);
}
.identity-card strong,
.identity-card span { display: block; }
.identity-card strong { font-size: 1.05rem; }
.identity-card span { color: var(--muted); font-size: 0.9rem; }

.chat-window {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 32px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface-solid) 88%, transparent), color-mix(in srgb, var(--surface-solid) 72%, transparent)),
    var(--surface);
  box-shadow: var(--shadow);
}

.chat-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1rem 0.9rem;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 72%, transparent);
}
.chat-toolbar strong { display: block; letter-spacing: -0.02em; }
.ghost-button {
  padding: 0.62rem 0.86rem;
  font-weight: 800;
}

.chat-scroll-region { position: relative; }
.chat-log {
  height: min(67vh, 740px);
  min-height: 520px;
  overflow-y: auto;
  padding: 1.35rem;
  scroll-padding: 1rem;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}
.chat-log::-webkit-scrollbar { width: 10px; }
.chat-log::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 999px; }

.jump-latest {
  position: absolute;
  left: 50%;
  bottom: 0.85rem;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.95rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-chip);
  background: color-mix(in srgb, var(--surface-solid) 94%, transparent);
  backdrop-filter: blur(10px);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 800;
  box-shadow: var(--shadow-soft);
  z-index: 3;
  animation: messageIn 200ms ease both;
}
.jump-latest[hidden] { display: none; }
.jump-latest:hover { border-color: color-mix(in srgb, var(--accent) 68%, var(--border)); }
.jump-glyph {
  width: 0.6rem;
  height: 0.6rem;
  border-right: 2px solid var(--accent-strong);
  border-bottom: 2px solid var(--accent-strong);
  transform: rotate(45deg) translate(-1px, -1px);
}

.message-row {
  display: grid;
  gap: 0.65rem;
  margin: 0 0 1.1rem;
  animation: messageIn 260ms ease both;
}
.assistant-row {
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: start;
  max-width: 890px;
}
.user-row {
  justify-items: end;
  scroll-margin-top: 7rem;
}
.message-meta { margin-right: 0.2rem; }

.avatar {
  width: 42px;
  height: 42px;
  border-radius: 16px;
  object-fit: cover;
  object-position: center top;
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-soft);
}

.message {
  max-width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-bubble);
  box-shadow: var(--shadow-soft);
}
.message {
  max-width: 100%;
  border: 1px solid var(--agent-border);
  border-radius: var(--radius-bubble);
  box-shadow: var(--agent-shadow);
}
.user-message {
  max-width: min(720px, 86%);
  padding: 0.92rem 1rem;
  color: var(--user-text);
  background: var(--user);
  border-radius: var(--user-radius);
  border-bottom-right-radius: 8px;
  font-family: var(--font-user);
  font-weight: 700;
}
.assistant-message {
  width: 100%;
  padding: 1rem;
  color: var(--text);
  background: var(--agent);
  border-radius: var(--radius-bubble);
  border-bottom-left-radius: 8px;
}
.assistant-topline {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted-2);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.78rem;
}

.thinking-panel {
  margin: 0 0 0.95rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: color-mix(in srgb, var(--accent-soft) 78%, transparent);
  overflow: hidden;
}
.thinking-panel summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.72rem 0.85rem;
  color: var(--muted);
  cursor: pointer;
  font-weight: 800;
}
.thinking-panel summary::-webkit-details-marker { display: none; }
.thinking-panel summary small {
  color: var(--muted-2);
  font-size: 0.74rem;
  font-weight: 700;
}
.thinking-content {
  padding: 0 0.85rem 0.85rem;
  color: var(--muted);
  font-style: italic;
  white-space: pre-wrap;
}
.answer-content {
  color: var(--text);
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-word;
  font-family: var(--font-answer);
}
.answer-content code,
.answer-content pre { font-family: var(--font-mono); }
.answer-content p {
  margin: 0 0 0.8rem;
}
.answer-content p:last-child { margin-bottom: 0; }
.answer-content h2,
.answer-content h3,
.answer-content h4 {
  margin: 1.1rem 0 0.55rem;
  font-family: var(--font-display);
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.answer-content > h2:first-child,
.answer-content > h3:first-child,
.answer-content > h4:first-child { margin-top: 0; }
.answer-content h2 { font-size: 1.18rem; }
.answer-content h3 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-strong);
}
.answer-content h4 { font-size: 1rem; color: var(--text); }
.answer-content strong { font-weight: 800; color: var(--text); }
.answer-content .table-wrap {
  margin: 0.4rem 0 0.95rem;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 14px;
}
.answer-content table.md-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  table-layout: fixed;
}
.answer-content table.md-table th:first-child,
.answer-content table.md-table td:first-child {
  width: 38%;
}
.answer-content table.md-table th,
.answer-content table.md-table td {
  padding: 0.55rem 0.75rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
  overflow-wrap: anywhere;
  word-break: break-word;
}
.answer-content table.md-table thead th {
  background: color-mix(in srgb, var(--accent-soft) 80%, transparent);
  color: var(--text);
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.answer-content table.md-table tbody tr:last-child td { border-bottom: 0; }
.answer-content table.md-table tbody tr:nth-child(even) td {
  background: color-mix(in srgb, var(--surface) 60%, transparent);
}
.answer-content ul {
  display: grid;
  gap: 0.48rem;
  margin: 0.2rem 0 0.95rem;
  padding-left: 1.2rem;
}
.answer-content li::marker { color: var(--accent-strong); }
.answer-content a,
.text-link {
  color: var(--accent-strong);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.typing-message {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  width: auto;
  padding: 0.85rem 1rem;
}
.typing-message span {
  width: 0.44rem;
  height: 0.44rem;
  border-radius: 999px;
  background: var(--muted);
  animation: typingPulse 900ms ease-in-out infinite;
}
.typing-message span:nth-child(2) { animation-delay: 120ms; }
.typing-message span:nth-child(3) { animation-delay: 240ms; }

.composer {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1rem;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-solid) 90%, transparent);
}

/* Input field row (textarea + inline icon buttons) */
.composer-field {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  width: 100%;
}
.composer textarea {
  flex: 1 1 auto;
  width: 100%;
  max-height: 150px;
  resize: none;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 0.95rem 1rem;
  color: var(--text);
  background: var(--surface);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}
.composer textarea::placeholder { color: var(--muted-2); }

/* Inline composer icon buttons (plus / mic / voice / arrow-send). Hidden for
   Claude, revealed per brand. */
.cbtn {
  display: none;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  transition: background 160ms ease, transform 160ms ease, filter 160ms ease;
}
.cbtn svg { width: 20px; height: 20px; display: block; }
.cbtn:hover { transform: translateY(-1px); }
.cbtn-send {
  color: var(--user-text);
  background: var(--accent);
  border-color: transparent;
}
.cbtn-voice {
  color: #fff;
  background: #1c1c1c;
  border-color: transparent;
}

.composer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}
.composer-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.composer-send {
  min-height: 46px;
  padding: 0 1.25rem;
  border: 1px solid transparent;
  border-radius: 14px;
  color: var(--user-text);
  background: var(--accent);
  font-weight: 900;
  box-shadow: var(--shadow-soft);
  transition: transform 160ms ease, filter 160ms ease;
}
.composer-send:hover { transform: translateY(-1px); filter: brightness(1.04); }

.picker { position: relative; }
.picker-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 38px;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-chip);
  background: var(--surface);
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 700;
  transition: background 160ms ease, border-color 160ms ease;
}
.picker-trigger:hover { background: var(--surface-strong); border-color: var(--border-strong); }
.picker.is-open .picker-trigger {
  background: var(--surface-strong);
  border-color: color-mix(in srgb, var(--accent) 60%, var(--border));
}
.picker-thinkglyph {
  width: 0.78rem;
  height: 0.78rem;
  border-radius: 50%;
  border: 2px solid var(--accent-strong);
  border-right-color: transparent;
  flex: 0 0 auto;
}
.picker-caret {
  width: 0.42rem;
  height: 0.42rem;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: rotate(45deg) translate(-1px, -1px);
  transition: transform 180ms ease;
}
.picker.is-open .picker-caret { transform: rotate(-135deg) translate(-1px, -1px); }

.picker-menu {
  position: absolute;
  bottom: calc(100% + 0.5rem);
  left: 0;
  z-index: 60;
  min-width: 232px;
  padding: 0.4rem;
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  background: var(--surface-solid);
  box-shadow: var(--shadow);
  animation: pickerIn 140ms ease both;
}
.picker-menu[hidden] { display: none; }
.picker-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  width: 100%;
  padding: 0.55rem 0.65rem;
  border: 0;
  border-radius: 11px;
  background: transparent;
  color: var(--text);
  text-align: left;
}
.picker-option:hover { background: var(--surface-strong); }
.picker-option-copy { display: grid; gap: 0.1rem; }
.picker-option-label { font-size: 0.9rem; font-weight: 700; }
.picker-option-sub { font-size: 0.76rem; color: var(--muted-2); }
.picker-check {
  width: 1rem;
  height: 1rem;
  flex: 0 0 auto;
  opacity: 0;
}
.picker-option[aria-selected="true"] .picker-check {
  opacity: 1;
  background:
    linear-gradient(45deg, transparent 46%, var(--accent-strong) 46%, var(--accent-strong) 54%, transparent 54%),
    linear-gradient(-45deg, transparent 60%, var(--accent-strong) 60%, var(--accent-strong) 68%, transparent 68%);
}
.picker-option[aria-selected="true"] .picker-option-label { color: var(--accent-strong); }

@keyframes pickerIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.composer-status {
  margin: 0;
  padding: 0 1.1rem 1rem;
  color: var(--muted-2);
  background: color-mix(in srgb, var(--surface-solid) 90%, transparent);
  font-size: 0.82rem;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 0 2rem;
  color: var(--muted);
  font-size: 0.92rem;
}
.footer p { margin: 0; }

.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;
}

@keyframes ambientFloat {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(2rem, -1.5rem, 0) scale(1.08); }
}
@keyframes messageIn {
  from { opacity: 0; transform: translateY(10px) scale(0.99); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes typingPulse {
  0%, 70%, 100% { transform: translateY(0); opacity: 0.35; }
  35% { transform: translateY(-4px); opacity: 1; }
}

@media (max-width: 1040px) {
  .nav-links { display: none; }
  .menu-toggle { display: inline-flex; }
  .brand { min-width: 0; }
}

@media (max-width: 760px) {
  .container { width: min(100% - 1rem, var(--max-width)); }
  .site-header { width: calc(100% - 0.7rem); padding: 0.35rem; border-radius: 0 0 20px 20px; }
  .nav { gap: 0.55rem; min-height: 66px; }
  .brand-copy small { max-width: 10rem; }
  .model-chip { display: none; }
  .intro-panel { grid-template-columns: 1fr; margin-top: 0.35rem; padding: 0.7rem 0.85rem; gap: 0.45rem; }
  .intro-copy h1 { font-size: clamp(1.5rem, 7vw, 2rem); margin: 0 0 0.2rem; }
  .intro-copy p { font-size: 0.86rem; }
  .static-resume-link { margin-top: 0.55rem; padding: 0.45rem 0.8rem; font-size: 0.82rem; }
  .identity-card { display: none; }
  .chat-stage { padding-top: 0.6rem; }
  .chat-window {
    border-radius: 24px;
    display: flex;
    flex-direction: column;
    max-height: calc(100dvh - 132px);
  }
  .chat-toolbar { align-items: flex-start; padding: 0.85rem; flex: 0 0 auto; }
  .chat-scroll-region { flex: 1 1 auto; min-height: 0; display: flex; }
  .chat-log { flex: 1 1 auto; height: auto; min-height: 0; padding: 0.85rem; }
  .assistant-row { grid-template-columns: 34px minmax(0, 1fr); gap: 0.5rem; }
  .avatar { width: 34px; height: 34px; border-radius: 13px; }
  .assistant-message { padding: 0.86rem; border-radius: 20px; border-bottom-left-radius: 7px; }
  .assistant-topline { flex-direction: column; gap: 0.2rem; }
  .answer-content table.md-table { font-size: 0.78rem; }
  .answer-content table.md-table th,
  .answer-content table.md-table td { padding: 0.4rem 0.5rem; }
  .answer-content .table-wrap { border-radius: 12px; }
  .user-message { max-width: 92%; border-radius: 20px; border-bottom-right-radius: 7px; }
  .composer { padding: 0.85rem; flex: 0 0 auto; }
  .composer textarea {
    white-space: normal;
    min-height: 3.4rem;
    padding: 0.55rem 0.9rem;
    line-height: 1.25;
  }
  .composer textarea::placeholder { font-size: 0.82rem; }
  .composer-controls { gap: 0.4rem; }
  .picker-trigger { font-size: 0.8rem; padding: 0.3rem 0.6rem; min-height: 36px; }
  .picker-menu { min-width: min(248px, calc(100vw - 2.6rem)); }
  .composer-send { min-height: 42px; padding: 0 1rem; }
  .composer-status {
    flex: 0 0 auto;
    padding-bottom: calc(0.85rem + env(safe-area-inset-bottom, 0px));
  }
  .footer { padding: 0 0.5rem calc(1.4rem + env(safe-area-inset-bottom, 0px)); }
}

@media (max-width: 430px) {
  .brand-copy small { display: none; }
  .chat-window { max-height: calc(100dvh - 118px); }
  .mobile-nav { grid-template-columns: 1fr; }
  .answer-content table.md-table { font-size: 0.72rem; }
  .answer-content table.md-table th,
  .answer-content table.md-table td { padding: 0.34rem 0.42rem; }
  .intro-copy h1 { font-size: 1.85rem; }
  .intro-copy p {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}

/* =====================================================================
   Brand themes — Claude (default) / Copilot / ChatGPT / Gemini
   Each composes with [data-theme="dark"|"light"]. Claude = the base
   palette already defined above, so only the other three need overrides.
   ===================================================================== */

/* ---------- Clad / Claude (Anthropic) fonts ---------- */
[data-brand="claude"] {
  --font-sans: "Styrene B", "Hanken Grotesk", Inter, -apple-system, sans-serif;
  --font-display: "Styrene B", Geist, Inter, sans-serif;
  --font-answer: "Anthropic Serif", Fraunces, Georgia, "Times New Roman", serif;
  --font-user: "Styrene B", "Hanken Grotesk", Inter, sans-serif;
  --font-mono: "Anthropic Mono", "JetBrains Mono", ui-monospace, monospace;
}

/* ---------- Copilot (Microsoft Fluent) ---------- */
[data-brand="copilot"] {
  --font-sans: "Segoe UI", -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
  --font-display: "Segoe UI", system-ui, sans-serif;
  --font-answer: "Segoe UI", -apple-system, system-ui, Roboto, sans-serif;
  --font-user: "Segoe UI", -apple-system, system-ui, Roboto, sans-serif;
  --font-mono: "Cascadia Code", "Cascadia Mono", ui-monospace, Consolas, monospace;
  --radius-card: 16px;
  --radius-bubble: 14px;
  --radius-control: 10px;
  --user-radius: 14px;
}
[data-brand="copilot"][data-theme="dark"] {
  color-scheme: dark;
  --bg: #1b1a19; --bg-2: #201f1e;
  --surface: rgba(255,255,255,0.05); --surface-strong: rgba(255,255,255,0.1); --surface-solid: #292827;
  --border: rgba(255,255,255,0.12); --border-strong: rgba(255,255,255,0.22);
  --text: #f3f2f1; --muted: #c8c6c4; --muted-2: #97948f;
  --accent: #479ef5; --accent-strong: #6cb3f7; --accent-soft: rgba(71,158,245,0.16);
  --agent: #292827; --user: #0f6cbd; --user-text: #ffffff; --success: #6cb3f7;
  --ambient-a: #479ef5; --ambient-b: #8a6cf2; --ambient-opacity: 0.22;
  --shadow: 0 24px 70px rgba(0,0,0,0.45); --shadow-soft: 0 12px 30px rgba(0,0,0,0.3);
  --agent-border: var(--border); --agent-shadow: var(--shadow-soft);
}
[data-brand="copilot"][data-theme="light"] {
  color-scheme: light;
  --bg: #faf9f8; --bg-2: #ffffff;
  --surface: #ffffff; --surface-strong: #ffffff; --surface-solid: #ffffff;
  --border: rgba(0,0,0,0.1); --border-strong: rgba(0,0,0,0.18);
  --text: #201f1e; --muted: #605e5c; --muted-2: #8a8886;
  --accent: #0f6cbd; --accent-strong: #115ea3; --accent-soft: rgba(15,108,189,0.1);
  --agent: #f3f2f1; --user: #0f6cbd; --user-text: #ffffff; --success: #0f6cbd;
  --ambient-a: #0f6cbd; --ambient-b: #8a6cf2; --ambient-opacity: 0.14;
  --shadow: 0 22px 60px rgba(20,40,80,0.12); --shadow-soft: 0 10px 26px rgba(20,40,80,0.1);
  --agent-border: var(--border); --agent-shadow: var(--shadow-soft);
}

/* ---------- ChatGPT (OpenAI) ---------- */
[data-brand="chatgpt"] {
  --font-sans: "OpenAI Sans", Inter, ui-sans-serif, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-display: "OpenAI Sans", Inter, ui-sans-serif, -apple-system, sans-serif;
  --font-answer: "OpenAI Sans", Inter, ui-sans-serif, -apple-system, sans-serif;
  --font-user: "OpenAI Sans", Inter, ui-sans-serif, -apple-system, sans-serif;
  --font-mono: "Söhne Mono", "JetBrains Mono", ui-monospace, Menlo, monospace;
  --radius-card: 18px;
  --radius-bubble: 18px;
  --radius-control: 12px;
  --user-radius: 18px;
  --ambient-opacity: 0.08;
  /* borderless assistant turns, ChatGPT style */
  --agent-border: transparent;
  --agent-shadow: none;
}
[data-brand="chatgpt"][data-theme="dark"] {
  color-scheme: dark;
  --bg: #212121; --bg-2: #212121;
  --surface: #2f2f2f; --surface-strong: #3a3a3a; --surface-solid: #2f2f2f;
  --border: rgba(255,255,255,0.12); --border-strong: rgba(255,255,255,0.2);
  --text: #ececec; --muted: #b4b4b4; --muted-2: #8e8e8e;
  --accent: #10a37f; --accent-strong: #1bbf96; --accent-soft: rgba(16,163,127,0.16);
  --agent: #212121; --user: #2f2f2f; --user-text: #ececec; --success: #10a37f;
  --ambient-a: #10a37f; --ambient-b: #444654;
  --shadow: 0 24px 60px rgba(0,0,0,0.5); --shadow-soft: 0 10px 26px rgba(0,0,0,0.35);
}
[data-brand="chatgpt"][data-theme="light"] {
  color-scheme: light;
  --bg: #ffffff; --bg-2: #ffffff;
  --surface: #f4f4f4; --surface-strong: #ececec; --surface-solid: #ffffff;
  --border: rgba(0,0,0,0.1); --border-strong: rgba(0,0,0,0.16);
  --text: #0d0d0d; --muted: #5d5d5d; --muted-2: #8e8e8e;
  --accent: #10a37f; --accent-strong: #0d8a6c; --accent-soft: rgba(16,163,127,0.1);
  --agent: #ffffff; --user: #f4f4f4; --user-text: #0d0d0d; --success: #10a37f;
  --ambient-a: #10a37f; --ambient-b: #e3e3e3;
  --shadow: 0 22px 60px rgba(0,0,0,0.08); --shadow-soft: 0 10px 24px rgba(0,0,0,0.06);
}

/* ---------- Gemini (Google) ---------- */
[data-brand="gemini"] {
  --font-sans: "Google Sans", "Google Sans Text", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Google Sans", Roboto, Arial, sans-serif;
  --font-answer: "Google Sans", "Google Sans Text", Roboto, Arial, sans-serif;
  --font-user: "Google Sans", "Google Sans Text", Roboto, Arial, sans-serif;
  --font-mono: "Google Sans Code", "Roboto Mono", ui-monospace, monospace;
  --radius-card: 26px;
  --radius-bubble: 22px;
  --radius-control: 18px;
  --user-radius: 20px;
  /* borderless assistant turns, Gemini style */
  --agent-border: transparent;
  --agent-shadow: none;
}
[data-brand="gemini"][data-theme="dark"] {
  color-scheme: dark;
  --bg: #1e1f20; --bg-2: #1b1c1d;
  --surface: #282a2c; --surface-strong: #34373a; --surface-solid: #1e1f20;
  --border: rgba(255,255,255,0.1); --border-strong: rgba(255,255,255,0.2);
  --text: #e3e3e3; --muted: #c4c7c5; --muted-2: #9aa0a6;
  --accent: #a8c7fa; --accent-strong: #d3e3fd; --accent-soft: rgba(168,199,250,0.16);
  --agent: #1e1f20; --user: #333537; --user-text: #e3e3e3; --success: #a8c7fa;
  --ambient-a: #4285f4; --ambient-b: #9b72cb; --ambient-opacity: 0.26;
  --shadow: 0 24px 70px rgba(0,0,0,0.5); --shadow-soft: 0 12px 30px rgba(0,0,0,0.32);
}
[data-brand="gemini"][data-theme="light"] {
  color-scheme: light;
  --bg: #ffffff; --bg-2: #f0f4f9;
  --surface: #f0f4f9; --surface-strong: #e3eaf2; --surface-solid: #ffffff;
  --border: rgba(0,0,0,0.08); --border-strong: rgba(0,0,0,0.16);
  --text: #1f1f1f; --muted: #444746; --muted-2: #747775;
  --accent: #0b57d0; --accent-strong: #1a73e8; --accent-soft: rgba(11,87,208,0.1);
  --agent: #f0f4f9; --user: #d3e3fd; --user-text: #041e49; --success: #0b57d0;
  --ambient-a: #4285f4; --ambient-b: #9b72cb; --ambient-opacity: 0.16;
  --shadow: 0 22px 60px rgba(60,90,160,0.12); --shadow-soft: 0 10px 26px rgba(60,90,160,0.1);
}

/* ---------- Brand switch (segmented slider) ---------- */
.brand-switch {
  grid-column: 1 / -1;
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: stretch;
  margin-bottom: 0.4rem;
  padding: 5px;
  border: 1px solid var(--border);
  border-radius: var(--radius-chip);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}
.brand-thumb {
  position: absolute;
  top: 5px;
  bottom: 5px;
  left: calc(5px + var(--brand-index, 0) * ((100% - 10px) / 4));
  width: calc((100% - 10px) / 4);
  border-radius: var(--radius-chip);
  background: var(--surface-strong);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-soft);
  transition: left 0.3s cubic-bezier(0.3, 0.8, 0.3, 1), background 0.2s ease;
  z-index: 0;
}
.brand-seg {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.52rem 0.4rem;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 700;
  border-radius: var(--radius-chip);
  cursor: pointer;
  transition: color 0.2s ease;
  min-width: 0;
}
.brand-seg:hover { color: var(--text); }
.brand-seg.is-active { color: var(--text); }
.brand-ico { width: 1.2rem; height: 1.2rem; flex: 0 0 auto; display: block; }
.brand-seg span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

@media (max-width: 620px) {
  .brand-seg span { display: none; }
  .brand-seg { padding: 0.5rem; }
}

/* =====================================================================
   Per-brand structural morph: greeting logo, heading weight, composer
   chrome, and background treatment. Claude is the base; others override.
   ===================================================================== */

/* Greeting brand logo above the heading */
.brand-greeting-logo { margin: 0 0 0.6rem; line-height: 0; }
.brand-greeting-logo svg.brand-ico { width: 3.4rem; height: 3.4rem; }
.brand-greeting-logo:empty { display: none; }

/* Default (Claude): inline icon buttons stay hidden; pickers row + labeled
   Send button are the composer. */
.composer-field .cbtn { display: none; }

/* Heading weight/scale per brand to match each product's empty state */
[data-brand="copilot"] .intro-copy h1 { font-weight: 700; }
[data-brand="chatgpt"] .intro-copy h1 { font-weight: 600; letter-spacing: -0.02em; }
[data-brand="gemini"]  .intro-copy h1 { font-weight: 400; letter-spacing: -0.01em; }

/* ---- Copilot composer: cream pill, + / mic / dark voice circle, no pickers ---- */
[data-brand="copilot"] .composer-bar { display: none; }
[data-brand="copilot"] .composer-field {
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-chip);
  background: var(--surface-strong);
  padding: 0.3rem 0.4rem 0.3rem 0.5rem;
  box-shadow: var(--shadow-soft);
}
[data-brand="copilot"] .composer textarea {
  border: 0; background: transparent; box-shadow: none; padding: 0.55rem 0.4rem;
}
[data-brand="copilot"] .cbtn-plus,
[data-brand="copilot"] .cbtn-mic,
[data-brand="copilot"] .cbtn-voice { display: inline-flex; }
[data-brand="copilot"] .cbtn-plus,
[data-brand="copilot"] .cbtn-mic { background: transparent; border-color: transparent; }
[data-brand="copilot"] .cbtn-send { display: none; }

/* ---- ChatGPT composer: rounded rect, + left, gray arrow-send right ---- */
[data-brand="chatgpt"] .composer-bar { display: none; }
[data-brand="chatgpt"] .composer-field {
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 26px;
  background: var(--surface);
  padding: 0.3rem 0.4rem 0.3rem 0.5rem;
}
[data-brand="chatgpt"] .composer textarea {
  border: 0; background: transparent; box-shadow: none; padding: 0.6rem 0.4rem;
}
[data-brand="chatgpt"] .cbtn-plus { display: inline-flex; background: transparent; border-color: transparent; }
[data-brand="chatgpt"] .cbtn-send {
  display: inline-flex;
  background: var(--surface-strong);
  color: var(--text);
  border-color: var(--border);
}
[data-brand="chatgpt"] .composer-status { text-align: center; }

/* ---- Gemini composer: airy pill, + left, mic + blue voice circle ---- */
[data-brand="gemini"] .composer-bar { display: none; }
[data-brand="gemini"] .composer-field {
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-chip);
  background: var(--surface);
  padding: 0.35rem 0.45rem;
  box-shadow: var(--shadow-soft);
}
[data-brand="gemini"] .composer textarea {
  border: 0; background: transparent; box-shadow: none; padding: 0.6rem 0.5rem;
}
[data-brand="gemini"] .cbtn-plus,
[data-brand="gemini"] .cbtn-mic { display: inline-flex; background: transparent; border-color: transparent; }
[data-brand="gemini"] .cbtn-voice {
  display: inline-flex;
  background: var(--accent-soft);
  color: var(--accent-strong);
  border-color: transparent;
}
[data-brand="gemini"] .cbtn-send { display: none; }

/* Gemini sky-gradient backdrop (light): white at top into soft blue below */
[data-brand="gemini"][data-theme="light"] body {
  background: linear-gradient(180deg, #ffffff 38%, #d6e6fb 100%);
}
[data-brand="gemini"][data-theme="light"] body::before { opacity: 0.18; }