:root {
  --bg0: #10211a;
  --bg1: #1b3b2c;
  --panel: #f6f8f4;
  --ink: #14231c;
  --muted: #5d7368;
  --accent: #1d7a4d;
  --line: rgba(20, 35, 28, 0.12);
  --bot: #e7f3eb;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Noto Sans SC", "DM Sans", sans-serif;
  background:
    radial-gradient(900px 480px at 0% 0%, #3d7a58 0%, transparent 55%),
    linear-gradient(165deg, var(--bg0), var(--bg1));
}
.shell { max-width: 1120px; margin: 0 auto; padding: 24px 16px 40px; }
.top { display: flex; justify-content: space-between; gap: 16px; align-items: flex-end; color: #f4faf6; }
.brand { margin: 0; font-family: "DM Sans", sans-serif; letter-spacing: 0.08em; font-size: 13px; color: #c6ef7a; }
.top h1 { margin: 4px 0 0; font-size: clamp(1.5rem, 3vw, 2rem); }
.status { font-size: 13px; padding: 8px 12px; border-radius: 999px; background: rgba(0,0,0,0.25); }
.status.ok { background: #1d7a4d; }
.status.bad { background: #8a3b2d; }

.tabs { display: flex; gap: 8px; margin: 18px 0; }
.tab {
  border: 0; background: rgba(255,255,255,0.12); color: #f4faf6;
  border-radius: 999px; padding: 8px 14px; font: inherit; cursor: pointer;
}
.tab.active { background: #f6f8f4; color: var(--ink); }

.pane { display: none; }
.pane.active { display: block; }
.layout { display: grid; grid-template-columns: 1.45fr 0.9fr; gap: 14px; }
@media (max-width: 860px) { .layout { grid-template-columns: 1fr; } }

.panel {
  background: var(--panel);
  border-radius: 18px;
  box-shadow: 0 16px 40px rgba(0,0,0,0.18);
}
.chat { display: flex; flex-direction: column; min-height: 560px; }
.log { flex: 1; overflow: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.bubble { max-width: 92%; padding: 10px 12px; border-radius: 12px; white-space: pre-wrap; line-height: 1.5; font-size: 14px; }
.bubble.bot { align-self: flex-start; background: var(--bot); }
.bubble.user { align-self: flex-end; background: var(--accent); color: white; }
.composer { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--line); }
.composer input, .stack input, .stack textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 11px 12px; font: inherit;
}
.composer button, .stack button, .ghost {
  border: 0; border-radius: 10px; padding: 11px 14px; font: inherit; font-weight: 600; cursor: pointer;
}
.composer button, .stack button { background: var(--accent); color: white; }
.ghost { background: transparent; color: var(--accent); border: 1px solid var(--line); }
.toolbar { display: flex; justify-content: space-between; align-items: center; padding: 0 12px 12px; }
.meta, .lede { color: var(--muted); font-size: 13px; }
.side, .pad { padding: 16px; }
.side h2, .pad h2 { margin: 14px 0 8px; font-size: 13px; letter-spacing: 0.04em; color: var(--muted); }
.side h2:first-child, .pad h2:first-child { margin-top: 0; }
pre {
  margin: 0; padding: 10px; background: #eef5f0; border-radius: 10px;
  font-size: 12px; overflow: auto; max-height: 180px; white-space: pre-wrap;
}
.stack { display: grid; gap: 8px; }
.lead-list { display: grid; gap: 8px; }
.lead {
  padding: 10px 12px; border-radius: 10px; background: #eef5f0; font-size: 14px;
}
a { color: var(--accent); }