/* Design tokens (light/dark), reset, buttons, icons. */
:root {
  --bg: #f7f7f5; --panel: #ffffff; --panel-2: #f0efec; --border: #e4e2dd;
  --text: #1f1e1c; --muted: #6f6c66; --accent: #c96442; --accent-text: #ffffff; --accent-soft: #f6e6df;
  --user-bg: #efe9e2; --ok: #2f7d4f; --warn: #a16207; --err: #b42318;
  --code-bg: #f2f0ec; --shadow: 0 1px 2px rgba(0,0,0,.04), 0 4px 16px rgba(0,0,0,.05);
  --menu-shadow: 0 8px 28px rgba(0,0,0,.14);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1b1a18; --panel: #24221f; --panel-2: #2e2b27; --border: #3a3732;
    --text: #ecebe8; --muted: #a29e96; --accent: #d97757; --accent-text: #1b1a18; --accent-soft: #3a2a22;
    --user-bg: #34302a; --ok: #5cbf86; --warn: #e0b04a; --err: #f07167;
    --code-bg: #2f2c28; --shadow: none; --menu-shadow: 0 8px 28px rgba(0,0,0,.5);
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--text); font: 14px/1.55 "Plus Jakarta Sans", system-ui, sans-serif; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
code, .mono { font-family: "JetBrains Mono", monospace; font-size: 12.5px; }
.muted { color: var(--muted); }
[hidden] { display: none !important; }

.app { display: grid; grid-template-columns: 272px minmax(0, 1fr) 320px; height: 100vh; }

/* buttons */
.btn { border: 1px solid var(--border); background: var(--panel); border-radius: 8px; padding: 6px 11px; white-space: nowrap; display: inline-flex; align-items: center; gap: 6px; }
.btn:hover { background: var(--panel-2); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
.btn.primary:hover { filter: brightness(1.05); }
.btn.danger { color: var(--err); }
.btn.danger.solid { background: var(--err); border-color: var(--err); color: #fff; }
.btn.sm { padding: 3px 8px; font-size: 12.5px; }
.btn.ghost { border-color: transparent; background: none; }
.btn.ghost:hover { background: var(--panel-2); }
.icon-btn { border: 0; background: none; color: var(--muted); border-radius: 6px; width: 26px; height: 26px; display: inline-flex; align-items: center; justify-content: center; flex: none; }
.icon-btn:hover { background: var(--panel-2); color: var(--text); }
svg.i { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }