:root {
  --bg: #05060a;
  --panel: rgba(18, 21, 30, 0.72);
  --border: rgba(120, 140, 180, 0.16);
  --text: #e7ecf4;
  --muted: #8a93a6;
  --accent: #00e5ff;
  --accent2: #7c5cff;
  --good: #2bd576;
  --bad: #ff5d6c;
  --mono: "SFMono-Regular", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; height: 100%;
  background: radial-gradient(1200px 700px at 80% -10%, #0d1530 0%, var(--bg) 55%);
  color: var(--text); font-family: var(--mono); -webkit-font-smoothing: antialiased;
}

.glow { position: fixed; border-radius: 50%; filter: blur(120px); opacity: 0.32; z-index: 0; pointer-events: none; }
.glow-a { width: 480px; height: 480px; background: var(--accent); top: -160px; right: -120px; }
.glow-b { width: 420px; height: 420px; background: var(--accent2); bottom: -180px; left: -140px; }

header, nav, main, footer { position: relative; z-index: 1; }

header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 32px; border-bottom: 1px solid var(--border); backdrop-filter: blur(6px);
}
.brand { display: flex; align-items: baseline; gap: 14px; }
.logo { color: var(--accent); font-size: 20px; text-shadow: 0 0 18px var(--accent); }
.brand h1 { margin: 0; font-size: 20px; letter-spacing: 1px; font-weight: 600; }
.tag { color: var(--muted); font-size: 11px; letter-spacing: 1px; text-transform: uppercase; }

.status { display: flex; align-items: center; gap: 9px; font-size: 13px; color: var(--muted); }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--muted); box-shadow: 0 0 10px currentColor; }
.dot.on  { background: var(--good); animation: pulse 1.6s infinite; }
.dot.off { background: var(--bad); }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

.tabs { display: flex; gap: 6px; max-width: 940px; margin: 18px auto 0; padding: 0 24px; }
.tab {
  background: none; border: 1px solid transparent; color: var(--muted);
  font-family: var(--mono); font-size: 13px; padding: 9px 16px; border-radius: 10px 10px 0 0; cursor: pointer;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--text); background: var(--panel); border-color: var(--border); border-bottom-color: transparent; }

main { max-width: 940px; margin: 0 auto 28px; padding: 0 24px; }

.panel { display: none; }
.panel.active { display: block; }

.card, .panel > * { }

.toolbar { display: flex; align-items: center; gap: 16px; margin: 14px 0; }
#rerun {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #04101a; border: none; border-radius: 10px; padding: 9px 18px;
  font-family: var(--mono); font-weight: 700; font-size: 13px; cursor: pointer; letter-spacing: 0.4px;
}
#rerun:hover { filter: brightness(1.1); }
.hint { color: var(--muted); font-size: 12px; }

/* pseudo-terminal */
.term {
  margin: 0; background: rgba(0,0,0,0.55); border: 1px solid var(--border); border-radius: 14px;
  padding: 18px 20px; min-height: 60vh; max-height: 72vh; overflow-y: auto;
  font-family: var(--mono); font-size: 13px; line-height: 1.65; white-space: pre-wrap; word-break: break-word;
  box-shadow: 0 18px 50px rgba(0,0,0,0.45);
}
.term .ln { display: inline; }
.term .step    { color: var(--accent); font-weight: 600; }
.term .comment { color: var(--muted); font-style: italic; }
.term .info    { color: #aeb6c6; }
.term .ok      { color: var(--good); }
.term .fail    { color: var(--bad); font-weight: 700; }

/* guide */
.guide {
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  padding: 26px 30px; margin-top: 14px; line-height: 1.7; max-width: 760px;
  box-shadow: 0 18px 50px rgba(0,0,0,0.45);
}
.guide h2 { margin: 0 0 14px; font-size: 19px; }
.guide h3 { margin: 26px 0 8px; font-size: 14px; color: var(--accent); letter-spacing: 0.4px; }
.guide p { color: #c7cedb; font-size: 13.5px; margin: 8px 0; }
.guide b { color: var(--text); }
.guide ul { color: #c7cedb; font-size: 13.5px; padding-left: 18px; }
.guide li { margin: 5px 0; }
.guide code { background: rgba(0,229,255,0.08); color: var(--accent); padding: 1px 6px; border-radius: 5px; font-size: 12.5px; }
.guide pre {
  background: rgba(0,0,0,0.5); border: 1px solid var(--border); border-left: 3px solid var(--accent2);
  border-radius: 10px; padding: 14px 16px; overflow-x: auto; margin: 10px 0;
}
.guide pre code { background: none; color: #d7deea; padding: 0; font-size: 12.5px; line-height: 1.6; }

footer { text-align: center; color: var(--muted); font-size: 11px; padding: 22px; letter-spacing: 0.5px; }