:root {
  --bg: #070a12;
  --card: #0f1422;
  --card-2: #141a2b;
  --border: rgba(140, 160, 200, 0.2);
  --text: #dfe6f3;
  --muted: #8d99b0;
  --accent: #ffb547;
  --primary: #3f7fd9;
  --ok: #4cd08a;
  --warn: #ffcc4d;
  --bad: #ff6b6b;
  --info: #4fd1c5;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body { font: 14px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.muted { color: var(--muted); }
.small { font-size: 12px; font-weight: 400; }
.hidden { display: none !important; }

/* ---- Top bar ---- */
.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
}
.eyebrow { margin: 0; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); }
.topbar h1 { margin: 2px 0 0; font-size: 20px; letter-spacing: 0.01em; }
.topbar-right { display: flex; align-items: center; gap: 16px; }
.link { color: var(--primary); text-decoration: none; }
.link:hover { text-decoration: underline; }

.pill {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 999px;
  border: 1px solid currentColor;
  white-space: nowrap;
}
.pill-ok { color: var(--ok); }
.pill-wait { color: var(--warn); }
.pill-bad { color: var(--bad); }
.pill-idle { color: var(--muted); }
.pill-run { color: var(--accent); }

/* ---- Layout ---- */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 20px;
  padding: 20px 24px 32px;
  max-width: 1400px;
  margin: 0 auto;
  align-items: start;
}
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px 22px; min-width: 0; }
.card h2 { margin: 0 0 6px; font-size: 17px; }
.card h3 { margin: 22px 0 8px; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.lede { margin: 0 0 14px; color: var(--muted); }

/* ---- Questionnaire ---- */
.presets { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 8px; font-size: 13px; }
fieldset { border: none; border-top: 1px solid var(--border); margin: 0; padding: 16px 0 6px; }
legend { padding: 0 8px 0 0; margin-bottom: 10px; font-size: 15px; }
legend strong { color: var(--accent); font-weight: 600; }
.num {
  display: inline-grid;
  margin-right: 8px;
  vertical-align: 1px;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--card-2);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--muted);
}
.answer { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; padding-left: 32px; }
.help { margin: 6px 0 0 32px; font-size: 12px; color: var(--muted); }
input[type="number"] {
  width: 160px;
  font: 16px ui-monospace, "Cascadia Mono", Consolas, monospace;
  color: var(--text);
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
}
input[type="number"]:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
input[aria-invalid="true"] { border-color: var(--bad); }
.unit { color: var(--muted); }
.choices { display: grid; gap: 8px; padding-left: 32px; }
.choices label, .check {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  background: var(--card-2);
}
.check { margin-left: 32px; }
.choices label:has(input:checked) { border-color: var(--primary); }
.choices small, .check small { display: block; color: var(--muted); font-size: 12px; }
.choices input, .check input { margin-top: 4px; accent-color: var(--primary); }
.rockets { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }

/* ---- Vehicle editor ---- */
.vehicle { margin: 12px 0 0 32px; }
.vehicle summary { cursor: pointer; color: var(--primary); }
.vehicle .help { margin-left: 0; }
.tag { margin-left: 6px; font-size: 11px; padding: 1px 6px; border-radius: 999px; color: var(--accent);
  border: 1px solid currentColor; }
.stage { margin-top: 14px; }
.stage h4 { margin: 0 0 6px; font-size: 13px; color: var(--text); }
.stage-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px 12px; }
.field { display: grid; gap: 2px; font-size: 12px; color: var(--muted); min-width: 0; }
.field-row { display: flex; align-items: center; gap: 6px; min-width: 0; }
.field input[type="number"] { width: 100%; min-width: 0; font-size: 14px; padding: 6px 8px; }
.field .unit { flex: none; font-size: 12px; }
.derived { margin: 6px 0 0; font-size: 12px; color: var(--muted); }
.derived:empty { display: none; }
form:disabled, fieldset:disabled { opacity: 0.6; }

.feasibility { margin: 18px 0 0; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border); background: var(--card-2); }
.feasibility:empty { display: none; }
.feasibility.good { border-color: rgba(76, 208, 138, 0.5); }
.feasibility.tight { border-color: rgba(255, 204, 77, 0.6); }
.feasibility.bad { border-color: rgba(255, 107, 107, 0.6); }
.feasibility .verdict { font-weight: 600; margin: 0 0 6px; }
.feasibility.good .verdict { color: var(--ok); }
.feasibility.tight .verdict { color: var(--warn); }
.feasibility.bad .verdict { color: var(--bad); }
.feasibility dl { display: grid; grid-template-columns: auto auto; justify-content: start; gap: 2px 18px; margin: 0; font-size: 13px; }
.feasibility dt { color: var(--muted); }
.feasibility dd { margin: 0; font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; }
.feasibility dt.sub { padding-left: 12px; }
.feasibility .note { margin: 8px 0 0; font-size: 12px; color: var(--muted); }
.errors { color: var(--bad); margin: 12px 0 0; padding-left: 20px; }
.errors:empty { display: none; }

.actions { margin-top: 18px; display: flex; gap: 10px; }
button {
  font: inherit;
  color: var(--text);
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
}
button:hover { border-color: var(--muted); }
a.button {
  display: inline-block;
  color: var(--text);
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 12px;
  text-decoration: none;
}
a.button:hover { border-color: var(--muted); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.primary { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 600; padding: 10px 20px; font-size: 15px; }
button.danger { color: var(--bad); border-color: rgba(255, 107, 107, 0.45); }

/* ---- Flight ---- */
.flight-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.phases { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 2px; }
.phases li { display: flex; align-items: center; gap: 10px; padding: 5px 2px; color: var(--muted); }
.phases li::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--border);
}
.phases li.done { color: var(--text); }
.phases li.done::before { background: var(--ok); border-color: var(--ok); }
.phases li.active { color: var(--accent); font-weight: 600; }
.phases li.active::before { border-color: var(--accent); background: var(--accent); box-shadow: 0 0 0 4px rgba(255, 181, 71, 0.2); }
.phases li.failed { color: var(--bad); }
.phases li.failed::before { background: var(--bad); border-color: var(--bad); }

.telemetry { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; margin: 0; }
.telemetry div { background: var(--card-2); border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; }
.telemetry dt { font-size: 11px; color: var(--muted); }
.telemetry dd { margin: 0; font: 15px ui-monospace, "Cascadia Mono", Consolas, monospace; }

.result { margin-top: 14px; padding: 14px 16px; border-radius: 10px; border: 1px solid var(--border); background: var(--card-2); }
.result.success { border-color: rgba(76, 208, 138, 0.6); }
.result.failure { border-color: rgba(255, 107, 107, 0.6); }
.result h3 { margin: 0 0 8px; font-size: 15px; text-transform: none; letter-spacing: 0; color: var(--text); }
.result.success h3 { color: var(--ok); }
.result.failure h3 { color: var(--bad); }
.result table { border-collapse: collapse; font-size: 13px; width: 100%; }
.result th, .result td { padding: 3px 8px 3px 0; text-align: left; }
.result th { color: var(--muted); font-weight: 500; }
.result td { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; }

.log {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 320px;
  overflow-y: auto;
  font: 12px ui-monospace, "Cascadia Mono", Consolas, monospace;
  border-top: 1px solid var(--border);
}
.log li { padding: 4px 0; border-bottom: 1px solid rgba(140, 160, 200, 0.08); overflow-wrap: anywhere; }
.log .t { color: var(--muted); margin-right: 10px; }
.log .error { color: var(--bad); }
.log .success { color: var(--ok); }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; padding: 16px; }
  .topbar { padding: 14px 16px; }
}
@media (max-width: 480px) {
  .card { padding: 16px; }
  .answer, .choices, .help { padding-left: 0; margin-left: 0; }
  .check, .vehicle { margin-left: 0; }
  input[type="number"] { width: 140px; }
}

/* ---- Moon page additions ---- */
.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 14px; border-bottom: 1px solid var(--border); padding-bottom: 10px; }
.tabs button { display: inline-flex; align-items: center; gap: 2px; padding: 6px 12px 6px 6px; border-radius: 999px; }
.tabs button .num { margin-right: 6px; }
.tabs button[aria-selected="true"] { border-color: var(--primary); color: var(--text); background: rgba(63, 127, 217, 0.18); }
.tabs button[aria-selected="true"] .num { border-color: var(--primary); color: var(--text); }
.part-form > fieldset:first-of-type { border-top: none; padding-top: 4px; }
.grid2, .grid3 { display: grid; gap: 8px 12px; padding-left: 0; }
.grid2 { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.grid3 { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.part-form .presets { margin-bottom: 10px; }
.part-form .answer, .part-form .choices, .part-form .help { padding-left: 0; margin-left: 0; }
.part-form .check { margin-left: 0; margin-top: 8px; }
.part-form .vehicle { margin-left: 0; }
.help.flush { margin-left: 0; }
.choices.compact label { padding: 6px 10px; }
.field.wide { margin-top: 12px; }
select {
  font: inherit;
  color: var(--text);
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 8px;
  max-width: 100%;
}
select:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.engine-picker .derived { margin-top: 6px; }
.engine-picker .stage-grid { margin-top: 8px; }
.actions.wrap { flex-wrap: wrap; }
.delivered-box { margin: 10px 0; padding: 10px 12px; border-radius: 8px; background: rgba(76, 208, 138, 0.07);
  border: 1px solid rgba(76, 208, 138, 0.3); }
.result.failure .delivered-box { background: var(--card-2); border-color: var(--border); }
.delivered-box h4, .result h4 { margin: 0 0 6px; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.result h4 { margin-top: 12px; }
.delivered, .burns { display: grid; grid-template-columns: auto 1fr; gap: 2px 16px; margin: 0; font-size: 13px; }
.delivered dt, .burns dt { color: var(--muted); }
.delivered dd, .burns dd { margin: 0; font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; }
.delivered dd { font-size: 15px; color: var(--text); }