body.chat-page {
  min-height: 100vh;
  background: #f2efe8;
}

.chat-page .site-header {
  position: static;
}

.web-chat-shell {
  width: min(calc(100% - 32px), 1100px);
  min-height: calc(100vh - 76px);
  margin: 0 auto;
  padding: 28px 0;
}

.web-chat-card {
  display: grid;
  grid-template-rows: auto minmax(420px, 1fr) auto;
  min-height: calc(100vh - 132px);
  border: 1px solid var(--ink);
  background: var(--white);
}

.web-chat-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 70px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.web-chat-title {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.02em;
}

.web-chat-status {
  color: var(--muted);
  font-size: 13px;
}

.chat-plain-button {
  min-height: 38px;
  padding: 0 13px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.chat-plain-button:hover {
  border-color: var(--ink);
}

.web-chat-messages {
  min-height: 0;
  overflow-y: auto;
  padding: 34px 22px;
}

.web-chat-empty {
  max-width: 640px;
  margin: 12vh auto 0;
  text-align: center;
}

.web-chat-empty h1 {
  margin-bottom: 18px;
  font-size: clamp(46px, 7vw, 82px);
}

.web-chat-empty p {
  margin: 0 auto;
  color: var(--muted);
  font-size: 18px;
}

.chat-message {
  display: flex;
  max-width: 820px;
  margin: 0 auto 18px;
}

.chat-message.user {
  justify-content: flex-end;
}

.chat-bubble {
  max-width: min(78%, 680px);
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: #f7f4ed;
  white-space: pre-wrap;
  line-height: 1.55;
}

.chat-message.user .chat-bubble {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--white);
}

.chat-message.error .chat-bubble {
  border-color: var(--accent);
  background: #fff5f2;
  color: #7a2414;
}

.web-chat-composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  padding: 16px;
  border-top: 1px solid var(--line);
  background: var(--paper);
}

.web-chat-composer textarea {
  min-height: 52px;
  max-height: 180px;
  resize: none;
  padding: 14px 15px;
  border: 1px solid var(--line);
  outline: none;
  background: var(--white);
  color: var(--ink);
  font: inherit;
  line-height: 1.45;
}

.web-chat-composer textarea:focus {
  border-color: var(--ink);
}

.web-chat-send {
  min-width: 110px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--white);
  cursor: pointer;
  font-weight: 700;
}

.web-chat-send:disabled {
  cursor: wait;
  opacity: .55;
}

@media (max-width: 720px) {
  .web-chat-shell {
    width: 100%;
    padding: 0;
  }

  .web-chat-card {
    min-height: calc(100vh - 76px);
    border-inline: 0;
    border-bottom: 0;
  }

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

  .web-chat-send {
    min-height: 48px;
  }

  .chat-bubble {
    max-width: 90%;
  }
}