:root {
  --bg: #0b1026;
  --panel: #141a35;
  --panel2: #1c244a;
  --ink: #e9edf5;
  --dim: #9aa6c8;
  --accent: #4aa3ff;
  --go: #37d67a;
  --warn: #ffb020;
  --bad: #ff6b6b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: radial-gradient(circle at 50% -10%, #1b2a5e 0%, var(--bg) 55%);
  color: var(--ink);
  min-height: 100vh;
}
header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  border-bottom: 1px solid #263056;
  flex-wrap: wrap;
}
.brand { margin: 0; display: flex; align-items: center; gap: 11px; }
.meatball { height: 40px; width: 40px; flex: none; filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.4)); }
.wordmark { height: 42px; width: auto; display: block; overflow: visible; }
.wm-text {
  font-family: "Helvetica Neue", "Arial Narrow", Arial, sans-serif;
  font-weight: 800;
  font-size: 34px;
  letter-spacing: 3px;
  paint-order: stroke;
}
@keyframes wm-draw { to { stroke-dashoffset: 0; } }
@keyframes wm-fade { to { opacity: 1; } }
@keyframes wm-tw { 0%, 100% { opacity: 0.3; } 50% { opacity: 1; } }
.wm-orbit { stroke-dasharray: 470; stroke-dashoffset: 470; animation: wm-draw 1.1s cubic-bezier(0.2, 0.7, 0.2, 1) 0.15s forwards; }
.wm-rocket { opacity: 0; animation: wm-fade 0.5s ease 0.95s forwards; }
.wm-sat { opacity: 0; animation: wm-fade 0.4s ease 1.15s forwards; }
.wm-star, .wm-star2 { animation: wm-tw 3.2s ease-in-out infinite; }
.wm-star2 { animation-delay: 1.1s; }
@media (prefers-reduced-motion: reduce) {
  .wm-orbit { animation: none; stroke-dashoffset: 0; }
  .wm-rocket, .wm-sat { animation: none; opacity: 1; }
  .wm-star, .wm-star2 { animation: none; }
}
.knowledge {
  background: var(--panel2);
  padding: 6px 12px;
  border-radius: 20px;
  font-weight: 700;
}
.music-btn { background: var(--panel2); color: var(--ink); border: 1px solid #33407a; border-radius: 8px; padding: 6px 10px; font-size: 16px; cursor: pointer; }
.music-btn:hover { border-color: var(--accent); }
nav { display: flex; gap: 6px; margin-left: auto; flex-wrap: wrap; }
nav button {
  background: transparent;
  color: var(--dim);
  border: 1px solid transparent;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 15px;
  cursor: pointer;
}
nav button:hover { color: var(--ink); }
nav button.active { background: var(--panel2); color: var(--ink); border-color: #33407a; }

main { padding: 20px; max-width: 1000px; margin: 0 auto; }
.screen { display: none; }
.screen.active { display: block; }

.panel { background: var(--panel); border: 1px solid #263056; border-radius: 14px; padding: 18px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
h2 { margin: 0 0 8px; font-size: 19px; }
.hint { color: var(--dim); font-size: 14px; margin: 0 0 14px; }
.warn { color: var(--warn); min-height: 20px; font-weight: 600; }

.palette { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.part {
  background: var(--panel2);
  border: 1px solid #33407a;
  border-radius: 10px;
  padding: 10px;
  cursor: grab;
  text-align: left;
  color: var(--ink);
}
.part:active { cursor: grabbing; }
.part:hover { border-color: var(--accent); }
.part .pi { display: flex; justify-content: center; align-items: flex-end; height: 62px; background: #0d1330; border-radius: 8px; margin-bottom: 8px; }
.part-svg { display: block; }
.part .pi .part-svg { width: 42px; height: 58px; }
.part .pn { font-weight: 700; margin-top: 2px; }
.part .pb { font-size: 12px; color: var(--dim); margin-top: 4px; }
.part .pspec { font-size: 11px; color: var(--dim); margin-top: 6px; }
.part .pspec b { color: var(--ink); }
.stack-art { display: inline-flex; }
.stack-art .part-svg { width: 16px; height: 22px; }
.part .price { color: var(--warn); font-weight: 700; font-size: 13px; margin-top: 6px; }
.part.locked { opacity: 0.75; }
.part.owned { border-color: var(--go); }
.part[disabled] { opacity: 0.4; cursor: not-allowed; }

.stack { position: relative; display: flex; flex-direction: column; align-items: center; min-height: 200px; padding: 22px 10px; background: linear-gradient(#0d1330, #0a1128); border-radius: 10px; transition: outline-color 0.1s; }
.stack.drop-hot { outline: 2px dashed var(--accent); outline-offset: -5px; background: #101a3e; }
.rpart { cursor: pointer; line-height: 0; margin-bottom: -14px; transition: filter 0.1s; }
.rpart:last-child { margin-bottom: 0; }
.rpart:hover { filter: drop-shadow(0 0 5px var(--bad)); }
.rpart .part-svg { width: 76px; height: 106px; display: block; }
.booster-side { position: absolute; cursor: pointer; line-height: 0; transition: filter 0.1s; }
.booster-side:hover { filter: drop-shadow(0 0 5px var(--bad)); }
.booster-side .part-svg { width: 40px; height: 56px; display: block; }
.stack .empty { color: var(--dim); text-align: center; padding: 40px 10px; }
.stats { margin-top: 12px; font-size: 14px; color: var(--dim); line-height: 1.7; }
.stats b { color: var(--ink); }

.plan-list { line-height: 1.9; padding-left: 20px; }
.check { display: block; margin-top: 14px; color: var(--ink); cursor: pointer; }

.launch-grid { display: grid; grid-template-columns: 440px 1fr; gap: 16px; align-items: start; }
.stage-wrap { background: #05060f; border-radius: 14px; overflow: hidden; border: 1px solid #263056; line-height: 0; }
#sky { width: 100%; height: auto; display: block; }
.hud .mode { display: flex; gap: 16px; margin-bottom: 12px; }
.clock { font-size: 30px; font-weight: 800; font-variant-numeric: tabular-nums; letter-spacing: 1px; }
.telemetry { display: grid; gap: 8px; margin: 14px 0; }
.telemetry > div { display: flex; justify-content: space-between; align-items: center; font-size: 15px; }
.telemetry span { color: var(--dim); }
.telemetry b { font-variant-numeric: tabular-nums; }
.fuel { flex-direction: column; align-items: stretch !important; gap: 4px; }
.bar { height: 12px; background: #0d1330; border-radius: 6px; overflow: hidden; }
.bar i { display: block; height: 100%; width: 100%; background: linear-gradient(90deg, var(--go), var(--accent)); transition: width 0.1s linear; }
.checklist { display: grid; gap: 5px; margin: 10px 0; font-size: 14px; }
.checklist .step { color: var(--dim); padding: 5px 8px; border-radius: 6px; background: #0d1330; }
.checklist .step.done { color: var(--ink); background: #14351f; }
.checklist .step.done::before { content: "✅ "; }
.checklist .step:not(.done)::before { content: "◻️ "; }
.hard-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 10px 0; }
.hard-controls[hidden] { display: none; }
.launch-buttons { display: flex; gap: 8px; margin-top: 8px; }
button.primary, .launch-buttons button, .hard-controls button {
  background: var(--panel2); color: var(--ink); border: 1px solid #33407a;
  border-radius: 8px; padding: 10px 14px; font-size: 15px; cursor: pointer;
}
button.primary { background: var(--accent); border-color: var(--accent); color: #04101f; font-weight: 700; }
button.abort { background: #7a1f1f; border-color: #a83232; color: #ffe3e3; font-weight: 700; }
button.abort:not([disabled]):hover { background: #9a2626; }
button:hover:not([disabled]) { filter: brightness(1.1); }
button[disabled] { opacity: 0.4; cursor: not-allowed; }
.result { min-height: 40px; font-weight: 600; margin-top: 10px; white-space: pre-line; }

.mission-list { display: grid; gap: 10px; }
.mission { background: var(--panel2); border: 1px solid #33407a; border-radius: 10px; padding: 12px; }
.mission.done { border-color: var(--go); }
.mission h3 { margin: 0 0 4px; font-size: 16px; }
.mission .r { color: var(--warn); font-weight: 700; }
.mission.done .r { color: var(--go); }

.credit { text-align: center; color: var(--dim); font-size: 13px; padding: 24px 0 32px; }
.credit a { color: var(--accent); text-decoration: none; }
.credit a:hover { text-decoration: underline; }

@media (max-width: 820px) {
  .two-col, .launch-grid { grid-template-columns: 1fr; }
  .launch-grid { justify-items: center; }
}