/* ============================================================
   EAGLOPEN — GRAVITYLAB (Aerospace Science Playground)
   Mission: Touchdown — the EAGLOPEN emblem descends onto
   six worlds so visitors can feel gravity, not just read it.
   Design language: mission-console navy, cyan telemetry,
   gold command accents — matching the AlgoLab terminal system.
   ============================================================ */

.gravity-lab {
  position: relative;
  padding: var(--section-padding) 0;
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(15, 95, 168, 0.22), transparent 60%),
    radial-gradient(900px 420px at 8% 110%, rgba(72, 202, 228, 0.1), transparent 60%),
    linear-gradient(180deg, #081a2b 0%, #0a1424 55%, #0d1526 100%);
  overflow: hidden;
}

/* faint starfield behind the console, pure CSS */
.gravity-lab::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1.5px 1.5px at 12% 24%, rgba(255, 255, 255, 0.5), transparent 55%),
    radial-gradient(1px 1px at 28% 68%, rgba(255, 255, 255, 0.35), transparent 55%),
    radial-gradient(1.5px 1.5px at 44% 12%, rgba(255, 255, 255, 0.4), transparent 55%),
    radial-gradient(1px 1px at 62% 42%, rgba(255, 255, 255, 0.3), transparent 55%),
    radial-gradient(1.5px 1.5px at 76% 16%, rgba(255, 255, 255, 0.45), transparent 55%),
    radial-gradient(1px 1px at 88% 58%, rgba(255, 255, 255, 0.35), transparent 55%),
    radial-gradient(1px 1px at 8% 84%, rgba(255, 255, 255, 0.3), transparent 55%),
    radial-gradient(1.5px 1.5px at 94% 88%, rgba(255, 255, 255, 0.4), transparent 55%);
  pointer-events: none;
}

.gravity-lab .section-title {
  color: var(--color-white);
}

.gravity-lab .section-sub {
  color: var(--color-gray-300);
}

/* ===== MISSION CONSOLE SHELL ===== */
.gl-console {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
  background: #0d1526;
  border: 1px solid rgba(72, 202, 228, 0.18);
  border-radius: 14px;
  overflow: hidden;
  box-shadow:
    0 40px 80px -24px rgba(0, 0, 0, 0.6),
    0 0 0 1px rgba(8, 26, 43, 0.4),
    0 0 60px -18px rgba(72, 202, 228, 0.25);
}

.gl-console .al-terminal-bar {
  justify-content: flex-start;
}

.gl-mode-pill {
  margin-left: auto;
  font-family: "SF Mono", "Fira Code", Consolas, "Courier New", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #48cae4;
  border: 1px solid rgba(72, 202, 228, 0.35);
  border-radius: 999px;
  padding: 3px 12px;
  white-space: nowrap;
}

.gl-body {
  padding: 18px 20px 18px;
}

/* ===== CONTROL DECK ===== */
.gl-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.gl-worlds {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.gl-world {
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid rgba(72, 202, 228, 0.25);
  background: transparent;
  color: #c7d5e8;
  font-family: "SF Mono", "Fira Code", Consolas, "Courier New", monospace;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s var(--ease-expo);
}

.gl-world:hover {
  border-color: rgba(72, 202, 228, 0.6);
  transform: translateY(-1px);
}

.gl-world.is-active {
  background: #48cae4;
  border-color: #48cae4;
  color: #081a2b;
  font-weight: var(--font-weight-bold);
}

.gl-world:disabled {
  opacity: 0.45;
  cursor: default;
  transform: none;
}

.gl-actions {
  display: flex;
  gap: 8px;
}

.gl-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: "SF Mono", "Fira Code", Consolas, "Courier New", monospace;
  font-size: 0.8rem;
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition: background 0.25s var(--ease-expo), box-shadow 0.25s var(--ease-expo), transform 0.25s var(--ease-expo), color 0.25s ease, border-color 0.25s ease;
}

.gl-btn-drop {
  background: var(--color-gold);
  color: var(--color-primary-dark);
  box-shadow: 0 2px 14px rgba(201, 168, 76, 0.35);
}

.gl-btn-drop:hover {
  background: var(--color-gold-light);
  box-shadow: 0 6px 22px rgba(201, 168, 76, 0.45);
  transform: translateY(-1px);
}

.gl-btn-drop:disabled {
  opacity: 0.5;
  cursor: default;
  transform: none;
  box-shadow: none;
}

.gl-btn-orbit {
  background: transparent;
  color: #48cae4;
  border-color: rgba(72, 202, 228, 0.4);
}

.gl-btn-orbit:hover {
  border-color: #48cae4;
  background: rgba(72, 202, 228, 0.08);
  transform: translateY(-1px);
}

/* ===== STAGE ===== */
.gl-stage-wrap {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid rgba(72, 202, 228, 0.14);
  background: #05070f;
}

.gl-canvas {
  display: block;
  width: 100%;
  height: 480px;
  cursor: crosshair;
  touch-action: none;
}

.gl-canvas.is-grabbing {
  cursor: grabbing;
}

/* telemetry HUD — mono, top-left, like a lander readout */
.gl-hud {
  position: absolute;
  top: 14px;
  left: 16px;
  font-family: "SF Mono", "Fira Code", Consolas, "Courier New", monospace;
  font-size: 0.72rem;
  line-height: 1.75;
  color: rgba(199, 213, 232, 0.92);
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.8);
  pointer-events: none;
  user-select: none;
}

.gl-hud strong {
  color: #48cae4;
  font-weight: var(--font-weight-semibold);
}

.gl-hud .gl-hud-title {
  color: var(--color-gold-light);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.66rem;
}

/* touchdown result flash */
.gl-result {
  position: absolute;
  top: 14px;
  right: 16px;
  text-align: right;
  font-family: "SF Mono", "Fira Code", Consolas, "Courier New", monospace;
  font-size: 0.72rem;
  line-height: 1.7;
  color: rgba(199, 213, 232, 0.9);
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.8);
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.5s var(--ease-expo), transform 0.5s var(--ease-expo);
  pointer-events: none;
  user-select: none;
}

.gl-result.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.gl-result .gl-result-badge {
  display: inline-block;
  color: #081a2b;
  background: #8ce99a;
  border-radius: 4px;
  padding: 1px 8px;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.1em;
  margin-bottom: 2px;
}

.gl-result.is-hard .gl-result-badge {
  background: #ef233c;
  color: #fff;
}

/* interaction hint */
.gl-hint {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  font-family: "SF Mono", "Fira Code", Consolas, "Courier New", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: rgba(199, 213, 232, 0.65);
  background: rgba(5, 7, 15, 0.55);
  border: 1px solid rgba(72, 202, 228, 0.16);
  border-radius: 999px;
  padding: 5px 14px;
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
  transition: opacity 0.6s ease;
}

.gl-hint.is-hidden {
  opacity: 0;
}

/* orbit-mode "begin descent" action, floats over canvas */
.gl-land {
  position: absolute;
  left: 50%;
  bottom: 52px;
  transform: translate(-50%, 8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease-expo), transform 0.4s var(--ease-expo);
}

.gl-land.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
  pointer-events: auto;
}

/* ===== CONSOLE FOOTER — mission log + gravity meter ===== */
.gl-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 14px;
  font-family: "SF Mono", "Fira Code", Consolas, "Courier New", monospace;
  font-size: 0.76rem;
  color: #8aa2c0;
}

.gl-gmeter {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 220px;
  flex: 1;
  max-width: 340px;
}

.gl-gmeter-track {
  position: relative;
  flex: 1;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.gl-gmeter-fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 20%;
  border-radius: 999px;
  background: linear-gradient(90deg, #48cae4, #d4b86a);
  transition: width 0.8s var(--ease-expo);
}

/* Earth reference tick on the meter */
.gl-gmeter-earth {
  position: absolute;
  top: -3px;
  bottom: -3px;
  width: 2px;
  background: rgba(255, 255, 255, 0.55);
}

.gl-gmeter-label {
  white-space: nowrap;
  color: #c7d5e8;
}

.gl-gmeter-label strong {
  color: #48cae4;
  font-weight: var(--font-weight-semibold);
}

.gl-status {
  color: #5a708c;
  font-style: italic;
  text-align: right;
  flex: 1;
  min-width: 200px;
}

/* ===== FACT STRIP ===== */
.gl-fact {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  max-width: 980px;
  margin: 18px auto 0;
  padding: 14px 18px;
  border-radius: 12px;
  background: rgba(72, 202, 228, 0.06);
  border: 1px solid rgba(72, 202, 228, 0.16);
  color: var(--color-gray-300);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.gl-fact i {
  color: var(--color-gold-light);
  margin-top: 3px;
  flex-shrink: 0;
}

.gl-fact strong {
  color: var(--color-white);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .gl-canvas {
    height: 420px;
  }
}

@media (max-width: 768px) {
  .gl-body {
    padding: 14px 14px 16px;
  }

  .gl-canvas {
    height: 380px;
  }

  .gl-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .gl-actions {
    justify-content: stretch;
  }

  .gl-actions .gl-btn {
    flex: 1;
    justify-content: center;
  }

  .gl-world {
    font-size: 0.74rem;
    padding: 6px 12px;
  }

  .gl-hud {
    font-size: 0.64rem;
    top: 10px;
    left: 12px;
  }

  .gl-result {
    font-size: 0.64rem;
    top: 10px;
    right: 12px;
  }

  .gl-status {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .gl-canvas {
    height: 330px;
  }

  .gl-hint {
    font-size: 0.6rem;
    max-width: calc(100% - 24px);
    white-space: normal;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .gl-world,
  .gl-btn,
  .gl-result,
  .gl-land,
  .gl-gmeter-fill {
    transition: none !important;
  }
}