:root {
  --ink: #14110f;
  --paper: #f6efe4;
  --panel: rgba(255, 250, 242, 0.86);
  --line: rgba(20, 17, 15, 0.12);
  --accent: #c2410c;
  --accent-2: #0f766e;
  --shadow: 0 24px 60px rgba(20, 17, 15, 0.12);
  --radius: 22px;
  --font: "IBM Plex Sans", system-ui, sans-serif;
  --display: "Syne", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font);
  background: #1a120c;
}

.bg {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(900px 500px at 12% 10%, rgba(194, 65, 12, 0.35), transparent 60%),
    radial-gradient(700px 480px at 88% 0%, rgba(15, 118, 110, 0.28), transparent 55%),
    linear-gradient(160deg, #2a1710 0%, #120d0a 45%, #0c1716 100%);
  z-index: -1;
}

.shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
}

.hero {
  margin-bottom: 1.25rem;
  color: #fff7ed;
}

.brand {
  margin: 0 0 0.4rem;
  font-family: var(--display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  letter-spacing: -0.04em;
  line-height: 0.95;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  font-weight: 500;
  color: rgba(255, 247, 237, 0.82);
}

.lede {
  max-width: 62ch;
  margin: 0.85rem 0 0;
  color: rgba(255, 247, 237, 0.72);
  line-height: 1.55;
}

.lede a {
  color: #fdba74;
}

.layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 1rem;
}

.panel,
.chat {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.panel {
  padding: 1rem;
  display: grid;
  gap: 0.75rem;
  align-content: start;
}

.chat {
  min-height: 70vh;
  display: grid;
  grid-template-rows: 1fr auto auto auto;
  overflow: hidden;
}

label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: rgba(20, 17, 15, 0.72);
}

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

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.7rem 0.8rem;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
  font-size: 0.95rem;
}

textarea {
  resize: vertical;
}

.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.hint {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.45;
  color: rgba(20, 17, 15, 0.7);
}

.hint code {
  font-size: 0.8rem;
  background: rgba(20, 17, 15, 0.06);
  padding: 0.1rem 0.3rem;
  border-radius: 6px;
}

.btn,
button {
  border: 0;
  border-radius: 999px;
  cursor: pointer;
}

.btn.ghost,
.examples button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 0.7rem 1rem;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}

.messages {
  padding: 1.1rem;
  overflow: auto;
  display: grid;
  gap: 0.75rem;
  align-content: start;
}

.bubble {
  max-width: min(72ch, 92%);
  padding: 0.85rem 1rem;
  border-radius: 16px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.bubble.user {
  justify-self: end;
  background: #c2410c;
  color: #fff7ed;
}

.bubble.assistant {
  justify-self: start;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
}

.bubble.system {
  justify-self: center;
  background: rgba(15, 118, 110, 0.12);
  color: #115e59;
  font-size: 0.9rem;
}

.composer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
  padding: 0.85rem 1rem 0.4rem;
  border-top: 1px solid var(--line);
}

#sendBtn {
  align-self: end;
  padding: 0.85rem 1.2rem;
  background: var(--accent-2);
  color: white;
  font-weight: 700;
}

.examples {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  padding: 0 1rem 0.6rem;
}

.examples button {
  font-size: 0.85rem;
  padding: 0.45rem 0.75rem;
}

.status {
  margin: 0;
  padding: 0 1rem 0.9rem;
  min-height: 1.2rem;
  color: #9a3412;
  font-size: 0.88rem;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .chat {
    min-height: 60vh;
  }
}