:root {
  color-scheme: dark;
  --bg: #101521;
  --panel: rgba(255,255,255,.08);
  --panel-strong: rgba(255,255,255,.13);
  --text: #f7f0dc;
  --muted: #b9c2d6;
  --gold: #ffd166;
  --teal: #56cfe1;
  --bad: #ff6b6b;
  --ok: #8ce99a;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 10%, rgba(86,207,225,.22), transparent 28rem),
    radial-gradient(circle at 82% 0%, rgba(255,209,102,.18), transparent 22rem),
    linear-gradient(145deg, #0b1020 0%, #172033 52%, #241b31 100%);
  color: var(--text);
}
.shell { width: min(980px, 100%); margin: 0 auto; padding: 18px; }
.top-links { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.top-links a, button {
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
  background: rgba(255,255,255,.1);
  color: var(--text);
  padding: 10px 14px;
  text-decoration: none;
  font-weight: 800;
  box-shadow: 0 10px 25px rgba(0,0,0,.18);
}
button { cursor: pointer; font-size: 1rem; }
button:not(.secondary) { background: linear-gradient(135deg, #ffd166, #f77f00); color: #1e1303; border: 0; }
button.secondary { background: rgba(255,255,255,.08); }
button:disabled { opacity: .45; cursor: not-allowed; }
.hero { text-align: center; padding: 18px 8px 8px; }
.eyebrow, .label { color: var(--muted); text-transform: uppercase; letter-spacing: .11em; font-size: .76rem; font-weight: 900; }
h1 { font-size: clamp(2.4rem, 9vw, 5.5rem); line-height: .9; margin: 8px 0; }
h2 { margin: 4px 0 8px; }
.lede { margin: 0 auto; max-width: 42rem; color: var(--muted); font-size: 1.08rem; }
.panel {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 24px;
  padding: 18px;
  margin: 14px 0;
  backdrop-filter: blur(14px);
  box-shadow: 0 18px 50px rgba(0,0,0,.22);
}
.scoreboard { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; text-align: center; }
.scoreboard strong { display: block; font-size: 1.55rem; color: var(--gold); }
.order-card { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 18px; }
.pulse-pair { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 10px; text-align: center; }
.arrow { color: var(--gold); font-size: 2rem; }
.pulse {
  min-width: 108px;
  border-radius: 18px;
  padding: 13px 12px;
  border: 2px solid rgba(255,255,255,.22);
  font-weight: 1000;
  color: #101521;
  text-shadow: 0 1px rgba(255,255,255,.3);
}
.workbench { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: stretch; }
.path, .preview {
  min-height: 90px;
  margin: 8px 0 0;
  padding: 12px;
  border-radius: 18px;
  background: rgba(0,0,0,.22);
  border: 1px dashed rgba(255,255,255,.19);
}
.path { list-style-position: inside; }
.path li { margin: 5px 0; font-weight: 800; }
.preview { display: flex; align-items: center; gap: 8px; overflow-x: auto; }
.preview-step { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }
.preview-step::after { content: "›"; color: var(--muted); font-size: 1.35rem; }
.preview-step:last-child::after { content: ""; }
.dot { width: 35px; height: 35px; border-radius: 50%; border: 2px solid rgba(255,255,255,.55); box-shadow: 0 0 22px currentColor; }
.tools { display: grid; grid-template-columns: repeat(auto-fit, minmax(155px, 1fr)); gap: 10px; margin-top: 14px; }
.tool {
  text-align: left;
  border-radius: 18px;
  padding: 13px;
  min-height: 108px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.tool strong { display: block; font-size: 1.02rem; }
.tool small { display: block; color: var(--muted); margin-top: 5px; line-height: 1.25; }
.tool.used { opacity: .38; }
.message { min-height: 1.4em; color: var(--muted); font-weight: 750; }
.message.good { color: var(--ok); }
.message.bad { color: var(--bad); }
.controls { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.how ul { margin-bottom: 0; padding-left: 1.2rem; color: var(--muted); }
@media (max-width: 680px) {
  .shell { padding: 12px; }
  .order-card, .workbench { grid-template-columns: 1fr; }
  .scoreboard { grid-template-columns: 1fr 1fr 1fr; }
  .panel { border-radius: 18px; padding: 14px; }
  .pulse { min-width: 86px; }
}