:root {
  --bg: #06121c;
  --panel: rgba(8, 22, 34, 0.62);
  --panel-border: rgba(120, 200, 255, 0.18);
  --accent: #36c6ff;
  --accent-2: #ffd166;
  --text: #e9f4fb;
  --text-dim: #9fb8c7;
  --good: #5fd38a;
  --warn: #ff8a5c;
  --font: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

#app { position: fixed; inset: 0; }

#scene {
  display: block;
  width: 100%;
  height: 100%;
}

.hidden { display: none !important; }

/* ---------- Loading splash ---------- */
#loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 35%, #0d2b41, #06121c 70%);
  z-index: 40;
  transition: opacity 0.6s ease;
}
#loading.fade { opacity: 0; pointer-events: none; }
.loading-inner { text-align: center; }
.loading-inner h1 {
  font-size: 2rem;
  letter-spacing: 0.04em;
  margin: 0 0 0.4rem;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.loading-inner p { color: var(--text-dim); margin: 0 0 1.4rem; }
.spinner {
  width: 42px; height: 42px;
  margin: 0 auto;
  border: 3px solid rgba(54, 198, 255, 0.25);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- HUD ---------- */
.hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 20;
}
.hud-panel {
  position: absolute;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 12px 16px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
}
.hud-top-left { top: 16px; left: 16px; min-width: 250px; }
.hud-top-right { top: 16px; right: 16px; min-width: 165px; }
.hud-bottom-left { bottom: 16px; left: 16px; }
.hud-bottom-right { bottom: 16px; right: 16px; display: flex; align-items: flex-end; gap: 14px; pointer-events: auto; }

.boat-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.boat-sub { font-size: 0.72rem; color: var(--text-dim); margin-bottom: 10px; }

.gauge-row { display: flex; gap: 18px; align-items: flex-end; }
.gauge { display: flex; flex-direction: column; align-items: baseline; position: relative; }
.gauge-val { font-size: 1.7rem; font-weight: 700; line-height: 1; font-variant-numeric: tabular-nums; }
.gauge-unit { font-size: 0.7rem; color: var(--text-dim); margin-left: 1px; }
.gauge-label { font-size: 0.6rem; letter-spacing: 0.12em; color: var(--text-dim); margin-top: 4px; }

.meter { margin-top: 10px; display: flex; align-items: center; gap: 8px; }
.meter-label { font-size: 0.62rem; letter-spacing: 0.1em; color: var(--text-dim); width: 38px; }
.meter-track {
  flex: 1; height: 7px; border-radius: 4px;
  background: rgba(255, 255, 255, 0.1); overflow: hidden;
}
.meter-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--good));
  transition: width 0.15s ease;
}

.cond-title { font-size: 0.72rem; letter-spacing: 0.12em; color: var(--text-dim); margin-bottom: 8px; text-transform: uppercase; }
.cond-row { display: flex; justify-content: space-between; font-size: 0.85rem; padding: 2px 0; }
.cond-row span { color: var(--text-dim); }
.cond-row b { font-variant-numeric: tabular-nums; }

/* trim tabs + rudder */
.tabs-block { display: flex; gap: 18px; align-items: flex-end; }
.tab-col { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.tab-label { font-size: 0.58rem; letter-spacing: 0.1em; color: var(--text-dim); }
.tab-track {
  width: 16px; height: 70px; border-radius: 8px;
  background: rgba(255, 255, 255, 0.1); overflow: hidden;
  display: flex; align-items: flex-end;
}
.tab-fill {
  width: 100%; height: 0%;
  background: linear-gradient(0deg, var(--accent-2), var(--accent));
  transition: height 0.1s linear;
}
.tab-pct { font-size: 0.62rem; color: var(--text); font-variant-numeric: tabular-nums; }

.wheel { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.wheel-track {
  position: relative;
  width: 90px; height: 16px; border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
}
.wheel-dot {
  position: absolute; top: 50%; left: 50%;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent);
  transform: translate(-50%, -50%);
  transition: left 0.08s linear;
  box-shadow: 0 0 8px var(--accent);
}

.attitude { display: flex; flex-direction: column; gap: 4px; font-size: 0.8rem; text-align: right; }
.att-item { color: var(--text-dim); }
.att-item b { color: var(--text); font-variant-numeric: tabular-nums; }

.help-toggle {
  pointer-events: auto;
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text);
  font-size: 1.1rem; font-weight: 700;
  cursor: pointer;
  transition: background 0.15s, transform 0.15s;
}
.help-toggle:hover { background: rgba(54, 198, 255, 0.2); transform: scale(1.05); }

/* ---------- Overlay (help / start) ---------- */
.overlay {
  position: absolute;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(4, 12, 20, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.overlay.hidden { display: none; }
.overlay-card {
  width: min(820px, 92vw);
  max-height: 92vh;
  overflow-y: auto;
  background: linear-gradient(160deg, #0c2436, #081521);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  padding: 28px 32px;
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.6);
}
.overlay-card h2 {
  margin: 0 0 0.4rem;
  font-size: 1.7rem;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead { color: var(--text-dim); line-height: 1.5; margin: 0 0 1.3rem; font-size: 0.95rem; }
.lead b { color: var(--text); }

.keys-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 18px 26px;
  margin-bottom: 1.2rem;
}
.keys-col h3 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin: 0 0 0.6rem;
}
.key-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
  font-size: 0.82rem;
  color: var(--text-dim);
}
.key-row span { margin-left: 4px; }
.hint { font-size: 0.72rem; color: var(--text-dim); font-style: italic; margin: 6px 0 0; line-height: 1.4; }

kbd {
  display: inline-block;
  min-width: 22px;
  padding: 2px 7px;
  text-align: center;
  font-family: var(--font);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text);
  background: #13344a;
  border: 1px solid rgba(120, 200, 255, 0.3);
  border-bottom-width: 2px;
  border-radius: 6px;
}

.start-btn {
  display: inline-block;
  margin-top: 6px;
  padding: 12px 26px;
  font-size: 1rem;
  font-weight: 700;
  color: #04121c;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  box-shadow: 0 6px 18px rgba(54, 198, 255, 0.35);
}
.start-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(54, 198, 255, 0.5); }
.start-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 6px; }
.start-btn.secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--panel-border);
  box-shadow: none;
}
.start-btn.secondary:hover { background: rgba(255, 255, 255, 0.12); box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3); }
.footnote { font-size: 0.74rem; color: var(--text-dim); margin: 12px 0 0; }

/* toast for transient messages */
#toast {
  position: absolute;
  bottom: 96px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 8px 18px;
  font-size: 0.86rem;
  color: var(--text);
  opacity: 0;
  pointer-events: none;
  z-index: 30;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 640px) {
  .hud-top-left { min-width: 0; right: 16px; }
  .gauge-val { font-size: 1.3rem; }
  .overlay-card { padding: 20px; }
}

/* ============================================================
   Quest / navigation-trainer UI
   ============================================================ */

/* chartplotter minimap */
.minimap {
  position: absolute;
  right: 16px;
  bottom: 86px;
  width: 200px;
  height: 200px;
  z-index: 22;
  border-radius: 50%;
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.45);
  pointer-events: none;
}
@media (max-width: 640px) { .minimap { width: 140px; height: 140px; } }

/* lat/long readout under the chartplotter */
.latlon {
  position: absolute;
  right: 16px;
  bottom: 62px;
  width: 200px;
  text-align: center;
  z-index: 22;
  font: 600 12px/1.3 ui-monospace, "SFMono-Regular", Menlo, monospace;
  letter-spacing: 0.02em;
  color: #d6f0fb;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.7);
  pointer-events: none;
  display: none;
}
.latlon.show { display: block; }
@media (max-width: 640px) { .latlon { width: 140px; bottom: 44px; } }

/* frames-per-second readout (bottom centre) */
.fps {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 60;
  font: 600 11px/1 ui-monospace, "SFMono-Regular", Menlo, monospace;
  color: #bfe9c0;
  background: rgba(6, 18, 28, 0.45);
  padding: 3px 8px;
  border-radius: 5px;
  pointer-events: none;
}

/* objective bar (top centre) */
.objective-bar {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: min(640px, 70vw);
  padding: 9px 16px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 21;
  font-size: 0.86rem;
}
.obj-label {
  font-size: 0.6rem; letter-spacing: 0.14em; color: var(--accent);
  border: 1px solid rgba(54, 198, 255, 0.4); border-radius: 5px;
  padding: 2px 6px; flex-shrink: 0;
}
.obj-text { color: var(--text); }
.obj-pips { display: inline-flex; gap: 4px; margin-left: auto; flex-shrink: 0; }
.obj-pips i {
  width: 9px; height: 9px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.18); border: 1px solid rgba(255, 255, 255, 0.3);
}
.obj-pips i.on { background: var(--good); border-color: var(--good); box-shadow: 0 0 6px var(--good); }

/* no-wake / approach banner */
.zone-banner {
  position: absolute;
  top: 64px;
  left: 50%;
  transform: translateX(-50%);
  padding: 7px 16px;
  background: rgba(40, 90, 60, 0.7);
  border: 1px solid rgba(120, 230, 160, 0.4);
  border-radius: 20px;
  font-size: 0.82rem;
  z-index: 21;
  backdrop-filter: blur(6px);
}
.zone-banner.over {
  background: rgba(150, 60, 20, 0.78);
  border-color: rgba(255, 140, 90, 0.6);
  animation: pulseWarn 0.7s infinite;
}
@keyframes pulseWarn { 50% { background: rgba(200, 70, 20, 0.9); } }

/* transient centre banner */
.center-banner {
  position: absolute;
  top: 34%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.96);
  text-align: center;
  z-index: 23;
  opacity: 0;
  pointer-events: none;
}
.center-banner.show { animation: bannerPop 2.6s ease forwards; }
@keyframes bannerPop {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }
  12% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  78% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(1.02); }
}
.cb-title {
  font-size: 1.9rem; font-weight: 800; letter-spacing: 0.01em;
  text-shadow: 0 3px 18px rgba(0, 0, 0, 0.6);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.cb-sub { font-size: 0.95rem; color: var(--text); text-shadow: 0 2px 10px rgba(0,0,0,0.7); margin-top: 4px; }

/* toast (quest variant, supersedes the simple one) */
.q-toast {
  position: absolute;
  bottom: 300px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 9px 18px;
  font-size: 0.9rem;
  max-width: 70vw;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  z-index: 24;
  transition: opacity 0.2s, transform 0.2s;
}
.q-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.q-toast.warn { border-color: rgba(255, 180, 90, 0.6); }
.q-toast.bad { border-color: rgba(255, 90, 90, 0.7); background: rgba(70, 22, 22, 0.7); }

/* red/orange screen flash on grounding / speeding */
.screen-flash {
  position: absolute; inset: 0; z-index: 19;
  pointer-events: none; opacity: 0;
  transition: opacity 0.1s ease;
}
.screen-flash.on { opacity: 1; }
.screen-flash.bad { box-shadow: inset 0 0 160px 40px rgba(220, 40, 40, 0.6); }
.screen-flash.warn { box-shadow: inset 0 0 120px 30px rgba(255, 150, 30, 0.4); }

/* ---- level select ---- */
.level-grid { display: flex; flex-direction: column; gap: 10px; margin: 6px 0 18px; }
.level-card {
  display: flex; align-items: center; gap: 14px;
  text-align: left; cursor: pointer;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--panel-border);
  border-radius: 12px; padding: 12px 16px;
  color: var(--text); font-family: var(--font);
  transition: background 0.15s, transform 0.12s, border-color 0.15s;
}
.level-card:hover { background: rgba(54, 198, 255, 0.12); border-color: var(--accent); transform: translateX(3px); }
.level-num {
  font-size: 1.4rem; font-weight: 800; width: 38px; height: 38px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  border-radius: 9px; background: rgba(54, 198, 255, 0.15); color: var(--accent);
}
.level-card-name { font-size: 1.02rem; font-weight: 700; }
.level-card-sub { font-size: 0.78rem; color: var(--text-dim); }
.level-card-meta { display: flex; gap: 14px; align-items: baseline; margin-top: 2px; }
.level-card-stars { font-size: 0.85rem; color: var(--accent-2); letter-spacing: 2px; }
.level-card-diff { font-size: 0.72rem; color: var(--accent); letter-spacing: 3px; }
.level-group-title {
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-dim);
  margin: 16px 0 4px;
}

.overlay-actions { display: flex; gap: 12px; align-items: center; justify-content: flex-end; flex-wrap: wrap; }
.ghost-btn {
  padding: 10px 18px; font-size: 0.9rem; font-weight: 600;
  color: var(--text); background: transparent;
  border: 1px solid var(--panel-border); border-radius: 9px; cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.ghost-btn:hover { background: rgba(255, 255, 255, 0.08); border-color: var(--accent); }

/* ---- briefing ---- */
.briefing-card { width: min(860px, 94vw); }
.brief-head { display: flex; align-items: center; gap: 12px; }
.brief-badge {
  font-size: 0.62rem; letter-spacing: 0.14em; font-weight: 700;
  color: var(--accent-2); border: 1px solid rgba(255, 209, 102, 0.5);
  border-radius: 6px; padding: 3px 8px;
}
.brief-sub { color: var(--text-dim); margin: 2px 0 16px; font-size: 0.92rem; }
.brief-cols { display: grid; grid-template-columns: 1.1fr 1fr; gap: 24px; margin-bottom: 18px; }
@media (max-width: 700px) { .brief-cols { grid-template-columns: 1fr; } }
.brief-text p { line-height: 1.5; font-size: 0.92rem; color: #d8e7f0; margin: 0 0 12px; }
.brief-legend h3 {
  font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--accent); margin: 0 0 10px;
}
.legend-row { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 10px; }
.legend-sym {
  width: 26px; height: 26px; flex-shrink: 0; margin-top: 1px;
  background: #0e3f53; border-radius: 6px; border: 1px solid rgba(120,200,255,0.25);
}
.legend-name { font-size: 0.82rem; font-weight: 700; }
.legend-desc { font-size: 0.74rem; color: var(--text-dim); line-height: 1.35; }
.brief-conditions {
  margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--panel-border);
  font-size: 0.78rem; color: var(--text-dim);
}

/* ---- complete ---- */
.complete-card { width: min(520px, 92vw); text-align: center; }
.complete-stars { font-size: 3rem; letter-spacing: 8px; color: var(--accent-2); margin-bottom: 4px; }
.complete-name { color: var(--text-dim); margin-bottom: 18px; }
.complete-stats { display: flex; justify-content: center; gap: 26px; margin-bottom: 22px; }
.cstat { display: flex; flex-direction: column; }
.cstat b { font-size: 1.5rem; font-variant-numeric: tabular-nums; }
.cstat span { font-size: 0.68rem; letter-spacing: 0.1em; color: var(--text-dim); text-transform: uppercase; }
.complete-card .overlay-actions { justify-content: center; }
.all-done { color: var(--good); font-weight: 700; font-size: 0.95rem; }
.fail-mark { color: #ff5454; letter-spacing: 0; font-size: 3.4rem; }