:root {
  color-scheme: dark;
  --bg: #070a12;
  --card: #12182a;
  --text: #f4f7fb;
  --muted: #a0a8ba;
  --purple: #7c5cff;
  --green: #3ddc97;
  --line: rgba(255, 255, 255, 0.08);
  font-family: "Segoe UI", system-ui, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); min-height: 100vh; display: flex; flex-direction: column; }
button, textarea { font: inherit; color: inherit; }
.top, main, footer { padding: 16px 20px; }
.top { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 20px; display: flex; gap: 8px; align-items: center; }
.mark { width: 28px; height: 28px; border-radius: 8px; object-fit: cover; display: block; }
.badge { background: var(--purple); border-radius: 8px; padding: 4px 6px; font-size: 12px; font-weight: 700; }
.project, .presence, .who { color: var(--muted); display: flex; gap: 8px; align-items: center; }
.dot { width: 8px; height: 8px; border-radius: 99px; background: var(--green); }
.avatar { width: 32px; height: 32px; border-radius: 99px; background: var(--purple); display: grid; place-items: center; font-size: 12px; font-weight: 700; color: white; }
.who em { font-style: normal; color: var(--muted); margin-left: 6px; }
button { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 8px 12px; cursor: pointer; }
button.primary { background: var(--purple); border-color: transparent; font-weight: 700; }
main { flex: 1; display: grid; grid-template-columns: 220px 1fr 240px; gap: 12px; min-height: 0; }
aside, .editor-wrap { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 12px; }
.label { margin: 0 0 10px; color: var(--muted); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; }
.file { display: block; width: 100%; text-align: left; margin-bottom: 6px; background: transparent; }
.file.active, .tab.active { background: var(--purple); }
.tabs { margin-bottom: 8px; }
.tab { display: inline-block; border-radius: 10px; padding: 6px 10px; background: #1a2236; }
textarea { width: 100%; min-height: 280px; border: 0; resize: vertical; background: #0b101c; border-radius: 12px; padding: 12px; line-height: 1.5; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.output { margin-top: 12px; background: #0b101c; border-radius: 12px; padding: 12px; }
.output-head { display: flex; justify-content: space-between; color: var(--muted); font-size: 13px; }
#stdout { margin: 8px 0 0; white-space: pre-wrap; font-size: 20px; }
.person { display: flex; gap: 10px; align-items: center; margin-bottom: 12px; }
.person span { display: block; color: var(--muted); font-size: 13px; }
.note { color: var(--muted); font-size: 14px; }
footer { color: var(--muted); border-top: 1px solid var(--line); }
#status.ok { color: var(--green); }
#status.bad { color: #ff5d6c; }
@media (max-width: 900px) {
  main { grid-template-columns: 1fr; }
}