:root {
  --bg-0: #f9f4ea;
  --bg-1: #f2dbc7;
  --panel: #fffdf7;
  --text: #20201f;
  --muted: #5e5c57;
  --border: #d7ccb8;
  --accent: #0f6f66;
  --accent-strong: #0b4f48;
  --user-msg: #e6f7f2;
  --assistant-msg: #fff6e7;
  --system-msg: #f0ecff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Archivo", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 5% 10%, #fff3c8 0%, transparent 40%),
    radial-gradient(circle at 90% 0%, #d8f6ed 0%, transparent 34%),
    linear-gradient(160deg, var(--bg-0), var(--bg-1));
}

.shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.2rem;
  display: grid;
  gap: 1rem;
}

.top-bar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: start;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 16px;
  padding: 1rem 1.2rem;
}

.kicker {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0;
  color: var(--muted);
}

h1 {
  margin: 0.2rem 0 0;
  font-family: "Space Grotesk", sans-serif;
}

.subtitle {
  margin: 0.3rem 0 0;
  color: var(--muted);
}

.controls {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 16px;
  padding: 1rem;
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.88rem;
}

select,
input,
textarea,
button {
  font: inherit;
}

select,
input,
textarea {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  padding: 0.6rem 0.7rem;
}

.system-row {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 16px;
  padding: 1rem;
}

.chat-log {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 16px;
  min-height: 380px;
  max-height: 56vh;
  overflow: auto;
  padding: 1rem;
  display: grid;
  gap: 0.7rem;
}

.msg {
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 0.75rem 0.85rem;
}

.msg h3 {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  font-family: "Space Grotesk", sans-serif;
}

.msg p {
  margin: 0.35rem 0 0;
  white-space: pre-wrap;
}

.msg-user {
  background: var(--user-msg);
}

.msg-assistant {
  background: var(--assistant-msg);
}

.msg-system {
  background: var(--system-msg);
}

.composer {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 16px;
  padding: 1rem;
  display: grid;
  gap: 0.7rem;
}

.composer-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.status-text {
  margin: 0;
  color: var(--muted);
}

.send-btn,
.ghost-btn {
  border-radius: 10px;
  border: 1px solid var(--accent);
  padding: 0.6rem 1rem;
  cursor: pointer;
}

.send-btn {
  background: var(--accent);
  color: #f3fffd;
}

.send-btn:hover {
  background: var(--accent-strong);
}

.ghost-btn {
  background: transparent;
  color: var(--accent-strong);
}

.ghost-btn:hover {
  background: #e0f3f0;
}

@media (max-width: 900px) {
  .controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .top-bar {
    flex-direction: column;
  }

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