:root {
  color-scheme: dark;
  --bg: #09090b;
  --panel: #111113;
  --panel-soft: #17171a;
  --border: #2a2a30;
  --text: #f5f5f6;
  --muted: #9b9ba3;
  --accent: #e7e5df;
  --danger: #ff8f8f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, #1b1b20 0, var(--bg) 42rem);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

.login-shell {
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(100%, 380px);
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  box-shadow: 0 24px 80px rgb(0 0 0 / 36%);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: 24px;
  line-height: 1.1;
}

.login-card form {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

label {
  color: var(--muted);
  font-size: 13px;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0c0c0f;
  color: var(--text);
  outline: none;
}

input {
  height: 44px;
  padding: 0 12px;
}

textarea {
  min-height: 48px;
  max-height: 180px;
  resize: none;
  padding: 13px 14px;
  line-height: 1.45;
}

input:focus,
textarea:focus {
  border-color: #77776f;
}

button {
  height: 44px;
  border: 1px solid #d8d5cc;
  border-radius: 8px;
  background: var(--accent);
  color: #111113;
  cursor: pointer;
}

button:disabled {
  cursor: wait;
  opacity: 0.6;
}

.error {
  margin: 0;
  color: var(--danger);
  font-size: 13px;
}

.chat-shell {
  display: grid;
  grid-template-rows: auto 1fr auto;
  width: min(100%, 920px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 22px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 18px;
}

.status {
  max-width: 46%;
  overflow: hidden;
  color: var(--muted);
  font-size: 13px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.messages {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 0;
  overflow-y: auto;
  padding: 10px 0 18px;
}

.message {
  width: fit-content;
  max-width: min(760px, 92%);
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  line-height: 1.55;
  white-space: pre-wrap;
}

.message.user {
  align-self: flex-end;
  background: #e7e5df;
  color: #111113;
}

.message.assistant {
  align-self: flex-start;
  background: color-mix(in srgb, var(--panel-soft) 94%, transparent);
}

.composer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.composer button {
  width: 84px;
  align-self: end;
}

@media (max-width: 620px) {
  .chat-shell {
    padding: 16px;
  }

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

  .status {
    max-width: 100%;
  }

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

  .composer button {
    width: 100%;
  }
}