/* =========================================================
   Rocket Launch Simulator — 深空儀表板風格
   ========================================================= */

:root {
  --bg-0: #050915;
  --bg-1: #0b1226;
  --bg-2: #131b34;
  --panel: rgba(20, 28, 55, 0.85);
  --panel-border: rgba(120, 160, 255, 0.15);
  --text: #e6ecff;
  --text-dim: #98a5c9;
  --accent: #58c7ff;
  --accent-warm: #ffb454;
  --danger: #ff5975;
  --success: #7cffb2;
  --thrust: #58c7ff;
  --gravity: #ffb454;
  --drag: #ff88aa;
  --net: #7cffb2;
  --font-body: -apple-system, "Segoe UI", "Microsoft JhengHei", "PingFang TC", sans-serif;
  --font-num: "SF Mono", Consolas, "Cascadia Mono", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  min-height: 100vh;
  background: radial-gradient(ellipse at top, var(--bg-1) 0%, var(--bg-0) 60%);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  border-bottom: 1px solid var(--panel-border);
  background: rgba(11, 18, 38, 0.6);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.rocket-icon { font-size: 1.6em; }
.brand h1 {
  font-size: 1.25em;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.subtitle {
  font-size: 0.75em;
  color: var(--text-dim);
}
.rocket-picker {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.rocket-picker button {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  padding: 6px 14px;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.85em;
  cursor: pointer;
  transition: all 0.15s;
}
.rocket-picker button:hover {
  border-color: var(--accent);
  color: var(--text);
}
.rocket-picker button.active {
  background: var(--accent);
  color: var(--bg-0);
  border-color: var(--accent);
  font-weight: 700;
}

/* ---------- Main Grid ---------- */
.main-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 16px;
  padding: 16px;
  flex: 1;
}
@media (max-width: 1100px) {
  .main-grid { grid-template-columns: 1fr; }
}

/* ---------- Viz column ---------- */
.viz-column {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 500px;
}
.canvas-wrap {
  position: relative;
  background: linear-gradient(180deg, #000817 0%, #0b1226 40%, #1a2c5a 80%, #4a6ea8 100%);
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  overflow: hidden;
  aspect-ratio: 4/5;
  min-height: 400px;
}
#scene {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
.hud {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(10, 15, 30, 0.75);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 10px 14px;
  font-family: var(--font-num);
  font-size: 0.85em;
  min-width: 160px;
  backdrop-filter: blur(6px);
}
.hud-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 2px 0;
}
.hud-label {
  color: var(--text-dim);
  font-size: 0.85em;
}
.event-banner {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 20px;
  background: var(--accent-warm);
  color: var(--bg-0);
  border-radius: 20px;
  font-weight: 700;
  font-size: 0.9em;
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
  white-space: nowrap;
}
.event-banner.show { opacity: 1; }

.controls {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  padding: 10px 14px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
}
.controls button {
  background: var(--bg-2);
  color: var(--text);
  border: 1px solid var(--panel-border);
  padding: 8px 18px;
  border-radius: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}
.controls button:hover:not(:disabled) {
  border-color: var(--accent);
  transform: translateY(-1px);
}
.controls button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.controls .btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #4a9fff 100%);
  color: var(--bg-0);
  border-color: var(--accent);
}
.slider-label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-dim);
  font-size: 0.85em;
  margin-left: auto;
}
.slider-label input {
  width: 120px;
}

/* ---------- Dashboard column ---------- */
.dashboard-column {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  padding-right: 4px;
}
.dashboard-column::-webkit-scrollbar { width: 8px; }
.dashboard-column::-webkit-scrollbar-track { background: transparent; }
.dashboard-column::-webkit-scrollbar-thumb { background: var(--panel-border); border-radius: 4px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 14px 16px;
  backdrop-filter: blur(6px);
}
.panel h2 {
  font-size: 0.95em;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.tag {
  font-size: 0.8em;
  color: var(--text-dim);
  font-weight: 400;
  margin-left: auto;
}

/* ---------- Gauges ---------- */
.gauges {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.gauge {
  background: rgba(5, 9, 21, 0.5);
  border-radius: 8px;
  padding: 8px 10px;
}
.gauge-label {
  font-size: 0.75em;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.gauge-value {
  font-family: var(--font-num);
  font-size: 1.3em;
  font-weight: 700;
  color: var(--text);
  margin: 4px 0;
}
.gauge-value small {
  font-size: 0.55em;
  color: var(--text-dim);
  margin-left: 2px;
}
.gauge-bar {
  background: rgba(255, 255, 255, 0.08);
  height: 4px;
  border-radius: 2px;
  overflow: hidden;
}
.gauge-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #7cffe0);
  transition: width 0.2s;
}
.gauge-fill.fuel { background: linear-gradient(90deg, var(--success), var(--accent-warm)); }
.gauge-fill.accel { background: linear-gradient(90deg, var(--success), var(--danger)); }

/* ---------- Forces ---------- */
.forces {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.force-row {
  display: grid;
  grid-template-columns: 90px 1fr 90px;
  gap: 8px;
  align-items: center;
  font-size: 0.85em;
}
.force-name {
  color: var(--text-dim);
}
.force-name sub { font-size: 0.7em; }
.force-bar-outer {
  background: rgba(255, 255, 255, 0.06);
  height: 10px;
  border-radius: 5px;
  overflow: hidden;
}
.force-bar {
  height: 100%;
  transition: width 0.15s;
  width: 0;
}
.force-bar.thrust { background: var(--thrust); }
.force-bar.gravity { background: var(--gravity); }
.force-bar.drag { background: var(--drag); }
.force-bar.net { background: var(--net); }
.force-val {
  font-family: var(--font-num);
  font-size: 0.85em;
  text-align: right;
}
.force-row.net .force-name { color: var(--net); font-weight: 700; }
.mini-note {
  font-size: 0.72em;
  color: var(--text-dim);
  margin-top: 10px;
  padding: 6px 8px;
  background: rgba(88, 199, 255, 0.05);
  border-left: 2px solid var(--accent);
  border-radius: 4px;
  font-family: var(--font-num);
}

/* ---------- Specs ---------- */
.specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 16px;
  font-size: 0.85em;
}
.spec-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.spec-label {
  font-size: 0.75em;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.spec-val {
  font-family: var(--font-num);
  color: var(--text);
  font-weight: 600;
}

/* ---------- Materials ---------- */
.materials {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.material-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  font-size: 0.85em;
}
.material-name { color: var(--text); }
.material-note { color: var(--text-dim); font-size: 0.85em; }
.material-bar-wrap {
  grid-column: 1 / -1;
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 3px;
  overflow: hidden;
}
.material-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-warm));
}

/* ---------- Fuel ---------- */
.fuel-info {
  font-size: 0.85em;
}
.fuel-header {
  display: flex;
  justify-content: space-between;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--panel-border);
  margin-bottom: 8px;
}
.fuel-type {
  font-weight: 700;
  color: var(--accent);
}
.fuel-cycle {
  color: var(--text-dim);
  font-size: 0.85em;
}
.fuel-props {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 12px;
  padding: 4px 0;
}
.fuel-prop {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-num);
  font-size: 0.85em;
}
.fuel-prop-label { color: var(--text-dim); }
.fuel-note {
  margin-top: 8px;
  font-size: 0.75em;
  color: var(--text-dim);
  padding: 6px 8px;
  background: rgba(255, 180, 84, 0.05);
  border-left: 2px solid var(--accent-warm);
  border-radius: 4px;
}

/* ---------- Timeline ---------- */
.timeline {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85em;
  padding: 0;
}
.timeline li {
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: 10px;
  padding: 6px 8px;
  border-radius: 6px;
  transition: all 0.2s;
}
.timeline li.done {
  background: rgba(124, 255, 178, 0.08);
}
.timeline li.current {
  background: rgba(255, 180, 84, 0.15);
  border-left: 3px solid var(--accent-warm);
  padding-left: 5px;
}
.timeline .t {
  font-family: var(--font-num);
  color: var(--text-dim);
  font-size: 0.85em;
}
.timeline li.current .t { color: var(--accent-warm); font-weight: 700; }

/* ---------- First principles cards ---------- */
.fp-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.fp-card {
  background: rgba(5, 9, 21, 0.5);
  border-radius: 8px;
  border-left: 3px solid var(--accent);
  padding: 10px 12px;
  font-size: 0.85em;
}
.fp-title {
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 4px;
  font-size: 0.95em;
}
.fp-body {
  color: var(--text);
  line-height: 1.55;
}
.fp-eq {
  background: rgba(10, 20, 40, 0.7);
  padding: 4px 8px;
  margin: 6px 0;
  border-radius: 4px;
  font-family: var(--font-num);
  font-size: 0.9em;
  color: var(--accent-warm);
  display: inline-block;
}
.fp-body strong { color: var(--accent); }

/* ---------- Footer ---------- */
.footer {
  padding: 16px 24px;
  border-top: 1px solid var(--panel-border);
  color: var(--text-dim);
  font-size: 0.8em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  background: rgba(11, 18, 38, 0.4);
}
.footer a {
  color: var(--accent);
  text-decoration: none;
  margin: 0 8px;
}
.footer a:hover { text-decoration: underline; }

/* ---------- Accuracy panel ---------- */
.accuracy-panel { border-left: 3px solid var(--success); }
.accuracy-table {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85em;
}
.acc-row {
  display: grid;
  grid-template-columns: 100px 1fr 1fr 50px;
  gap: 6px;
  padding: 4px 6px;
  border-radius: 4px;
  align-items: center;
}
.acc-row.header {
  font-size: 0.75em;
  color: var(--text-dim);
  border-bottom: 1px solid var(--panel-border);
  padding-bottom: 6px;
  margin-bottom: 2px;
}
.acc-val {
  font-family: var(--font-num);
  font-size: 0.9em;
}
.acc-err {
  font-family: var(--font-num);
  font-size: 0.8em;
  text-align: right;
  font-weight: 700;
}
.acc-err.good { color: var(--success); }
.acc-err.ok { color: var(--accent-warm); }
.acc-err.bad { color: var(--danger); }
.acc-err.pending { color: var(--text-dim); }

/* ---------- Mobile ---------- */
@media (max-width: 640px) {
  .topbar { flex-direction: column; gap: 12px; align-items: stretch; }
  .rocket-picker { justify-content: center; }
  .brand { justify-content: center; }
  .canvas-wrap { aspect-ratio: 3/4; }
  .hud { font-size: 0.75em; min-width: 130px; }
  .gauges { grid-template-columns: 1fr; }
  .controls { justify-content: center; }
  .slider-label { margin-left: 0; }
}