:root {
  --bg: #f3eee6;
  --bg-soft: rgba(255, 252, 247, 0.72);
  --surface-strong: rgba(255, 255, 255, 0.9);
  --line: rgba(26, 55, 60, 0.12);
  --text: #132629;
  --muted: #617073;
  --accent: #1f8a70;
  --accent-strong: #145c4a;
  --status-ok: #d8a11d;
  --status-ok-ring: rgba(216, 161, 29, 0.18);
  --status-offline: #c84d44;
  --status-offline-ring: rgba(200, 77, 68, 0.18);
  --user: #eff8f4;
  --assistant: #fffdfa;
  --shadow: 0 24px 80px rgba(36, 54, 56, 0.12);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --font-sans: "Aptos", "Segoe UI Variable", "Trebuchet MS", sans-serif;
  --font-display: "Avenir Next", "Segoe UI Variable Display", "Aptos Display", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(31, 138, 112, 0.16), transparent 28%),
    radial-gradient(circle at top right, rgba(223, 172, 95, 0.22), transparent 24%),
    linear-gradient(180deg, #f8f4ee 0%, #efe8dc 100%);
  overflow: hidden;
}

.page {
  position: relative;
  min-height: 100vh;
  padding: 24px;
}

.page::before,
.page::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(12px);
  opacity: 0.7;
  pointer-events: none;
}

.page::before {
  width: 240px;
  height: 240px;
  background: rgba(31, 138, 112, 0.12);
  top: 48px;
  left: -40px;
}

.page::after {
  width: 300px;
  height: 300px;
  background: rgba(236, 196, 127, 0.16);
  right: -60px;
  bottom: 72px;
}

.shell {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  height: calc(100vh - 48px);
  margin: 0 auto;
  background: var(--bg-soft);
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px 18px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.08));
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-badge {
  width: 52px;
  height: 52px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(31, 138, 112, 0.18), rgba(19, 38, 41, 0.08));
  border: 1px solid rgba(31, 138, 112, 0.22);
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  overflow: hidden;
}

.brand-badge img {
  width: 72%;
  height: 72%;
  object-fit: contain;
}

.brand-fallback {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-strong);
  letter-spacing: 0.08em;
}

.brand-copy {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 4px;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.brand-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2vw, 1.8rem);
  letter-spacing: -0.04em;
}

.brand-subtitle {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.state-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
  white-space: nowrap;
}

.state-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--status-offline);
  box-shadow: 0 0 0 6px var(--status-offline-ring);
}

.state-pill.is-ok .state-dot {
  background: var(--status-ok);
  box-shadow: 0 0 0 6px var(--status-ok-ring);
}

.state-pill.is-offline .state-dot {
  background: var(--status-offline);
  box-shadow: 0 0 0 6px var(--status-offline-ring);
}

.messages {
  overflow-y: auto;
  padding: 28px 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  scroll-behavior: smooth;
}

.hero {
  margin: auto 0;
  padding: 18px 6px 24px;
  text-align: center;
}

.hero h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.3rem);
  letter-spacing: -0.06em;
}

.hero p {
  max-width: 620px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.message {
  max-width: 860px;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  animation: rise 180ms ease;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
}

.message.user .avatar {
  background: rgba(31, 138, 112, 0.16);
  color: var(--accent-strong);
  border-color: rgba(31, 138, 112, 0.2);
}

.message.assistant .avatar {
  background: rgba(255, 255, 255, 0.85);
  color: #816532;
  border-color: rgba(129, 101, 50, 0.14);
}

.bubble {
  border-radius: 24px;
  border: 1px solid var(--line);
  padding: 16px 18px;
  box-shadow: 0 12px 30px rgba(48, 64, 68, 0.06);
}

.message.user .bubble {
  background: var(--user);
}

.message.assistant .bubble {
  background: var(--assistant);
}

.meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.88rem;
}

.role {
  font-weight: 700;
  color: var(--text);
}

.body {
  white-space: pre-wrap;
  line-height: 1.7;
  word-break: break-word;
}

.body.is-placeholder {
  color: var(--muted);
  font-style: italic;
}

.tool-trace {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.trace-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(19, 38, 41, 0.05);
  border: 1px solid rgba(19, 38, 41, 0.08);
  font-size: 0.8rem;
  color: var(--muted);
}

.trace-pill.done {
  background: rgba(31, 138, 112, 0.1);
  color: var(--accent-strong);
  border-color: rgba(31, 138, 112, 0.16);
}

.trace-pill.error {
  background: rgba(177, 73, 73, 0.1);
  color: #9d3333;
  border-color: rgba(157, 51, 51, 0.16);
}

.composer {
  padding: 18px 24px 24px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 252, 247, 0.18), rgba(255, 255, 255, 0.44));
}

.composer-card {
  max-width: 920px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  padding: 12px;
  background: var(--surface-strong);
  border: 1px solid rgba(255, 255, 255, 0.72);
  box-shadow: 0 16px 40px rgba(34, 48, 51, 0.08);
}

.composer-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: end;
}

textarea {
  width: 100%;
  min-height: 64px;
  max-height: 240px;
  border: none;
  resize: none;
  background: transparent;
  color: var(--text);
  font: inherit;
  line-height: 1.6;
  padding: 10px 12px;
  outline: none;
}

textarea::placeholder {
  color: #7b8789;
}

.actions {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 0 4px 4px 0;
}

.send-button,
.reset-button {
  border: none;
  border-radius: 18px;
  font: inherit;
  cursor: pointer;
  transition: transform 140ms ease, opacity 140ms ease, background 140ms ease;
}

.send-button {
  min-width: 126px;
  padding: 14px 18px;
  background: linear-gradient(135deg, var(--accent), #3b9e83);
  color: white;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.send-button:hover,
.reset-button:hover {
  transform: translateY(-1px);
}

.send-button:disabled {
  opacity: 0.55;
  cursor: wait;
  transform: none;
}

.reset-button {
  padding: 12px 14px;
  background: rgba(19, 38, 41, 0.06);
  color: var(--muted);
}

.composer-note {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 12px 2px;
  color: var(--muted);
  font-size: 0.84rem;
}

.composer-note code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

@media (max-width: 900px) {
  .page {
    padding: 12px;
  }

  .shell {
    height: calc(100vh - 24px);
    border-radius: 24px;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .composer-form {
    grid-template-columns: 1fr;
  }

  .actions {
    justify-content: space-between;
    padding: 0 4px 4px 8px;
  }

  .send-button {
    min-width: 0;
    flex: 1;
  }

  .composer-note {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .messages,
  .topbar,
  .composer {
    padding-left: 16px;
    padding-right: 16px;
  }

  .message {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 10px;
  }

  .avatar {
    width: 36px;
    height: 36px;
    border-radius: 14px;
    font-size: 0.75rem;
  }

  .bubble {
    padding: 14px 15px;
    border-radius: 20px;
  }

  .hero h2 {
    font-size: 2rem;
  }
}