:root {
  --bg: #101114;
  --panel: #1a1f27;
  --panel-strong: #222936;
  --text: #f4f7f5;
  --muted: #a9b3ad;
  --border: #323a46;
  --primary: #28d79f;
  --accent: #ffb454;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  display: grid;
  place-items: center;
  padding: 18px;
  background:
    radial-gradient(circle at 15% 10%, rgba(40, 215, 159, 0.16), transparent 30%),
    radial-gradient(circle at 85% 20%, rgba(255, 180, 84, 0.12), transparent 28%),
    var(--bg);
}

button,
textarea {
  font: inherit;
}

.agent-shell {
  display: grid;
  gap: 16px;
  width: min(100%, 980px);
  min-height: min(720px, calc(100vh - 36px));
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: clamp(16px, 3vw, 28px);
  background: linear-gradient(180deg, var(--panel-strong), var(--panel));
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.32);
}

.agent-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.agent-header h1,
.agent-header p {
  margin: 0;
}

.agent-header h1 {
  font-size: clamp(1.55rem, 4vw, 2.4rem);
}

.eyebrow {
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.agent-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 14px;
  min-height: 420px;
}

.input-panel,
.output-panel {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 10px;
  min-width: 0;
}

.input-panel span,
.output-panel span {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
}

textarea,
pre {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  color: var(--text);
  background: #101114;
  line-height: 1.5;
}

textarea {
  resize: none;
}

pre {
  overflow: auto;
  white-space: pre-wrap;
}

.tool-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tool-strip span {
  border: 1px solid color-mix(in srgb, var(--primary) 40%, var(--border));
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--muted);
  background: rgba(40, 215, 159, 0.08);
  font-size: 0.82rem;
  font-weight: 700;
}

.actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

button {
  min-height: 42px;
  border: 0;
  border-radius: 12px;
  padding: 0 18px;
  color: #07111f;
  background: var(--primary);
  cursor: pointer;
  font-weight: 800;
}

button.secondary {
  color: var(--text);
  background: #323a46;
}

@media (max-width: 760px) {
  .agent-grid {
    grid-template-columns: 1fr;
  }
}