:root {
  color-scheme: dark;
  --space: #070b18;
  --ink: #e4edfb;
  --accent: #9ec9f0;
  --neon: #7fe8ff;
  --warn: #ffc48a;
}

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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--space);
}

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

/* --- HUD ------------------------------------------------------------- */

.hud {
  position: fixed;
  inset: 0;
  font-family: ui-sans-serif, system-ui, "Segoe UI", sans-serif;
  pointer-events: none;
  user-select: none;
}

.hud__panel {
  position: absolute;
  top: 20px;
  left: 22px;
  min-width: 196px;
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border: 1px solid rgba(158, 201, 240, 0.16);
  border-radius: 12px;
  background: rgba(12, 20, 38, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.hud__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.hud__label {
  font-size: 10px;
  letter-spacing: 0.19em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.6;
}

.hud__value {
  font-size: 19px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  transform-origin: right center;
  transition: transform 180ms cubic-bezier(0.2, 0.9, 0.3, 1), color 220ms ease;
}

.hud__value--pop {
  transform: scale(1.22);
}

.hud__max {
  font-size: 13px;
  font-weight: 500;
  opacity: 0.45;
}

.hud__bar {
  height: 3px;
  border-radius: 2px;
  background: rgba(158, 201, 240, 0.14);
  overflow: hidden;
}

.hud__fill {
  display: block;
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: var(--accent);
  transition: width 220ms cubic-bezier(0.2, 0.9, 0.3, 1), background-color 220ms ease;
}

.hud--full .hud__fill {
  background: var(--warn);
}

.hud--full .hud__value--cargo {
  color: var(--warn);
}

/* --- Uyarı ve etkileşim ipucu ----------------------------------------- */

.hud__alert,
.hud__prompt {
  position: absolute;
  left: 50%;
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, -6px);
  transition: opacity 200ms ease, transform 200ms ease, visibility 200ms;
}

.hud__alert.is-visible,
.hud__prompt.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.hud__alert {
  top: 26px;
  padding: 9px 18px;
  border: 1px solid rgba(255, 196, 138, 0.3);
  border-radius: 999px;
  background: rgba(46, 30, 20, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--warn);
  animation: alert-pulse 1.9s ease-in-out infinite;
}

.hud__prompt {
  bottom: 42px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 16px 9px 10px;
  border: 1px solid rgba(158, 201, 240, 0.2);
  border-radius: 10px;
  background: rgba(12, 20, 38, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-size: 13px;
  color: var(--ink);
}

.hud__key {
  min-width: 24px;
  padding: 3px 0;
  border: 1px solid rgba(158, 201, 240, 0.35);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: rgba(158, 201, 240, 0.12);
  font-family: inherit;
  font-size: 11px;
  font-weight: 700;
  text-align: center;
  color: var(--accent);
}

@keyframes alert-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.62; }
}

@media (prefers-reduced-motion: reduce) {
  .hud__alert { animation: none; }
}

/* --- Mağaza butonu ---------------------------------------------------- */

.hud__shop {
  position: absolute;
  top: 152px;
  left: 22px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border: 1px solid rgba(127, 232, 255, 0.24);
  border-radius: 9px;
  background: rgba(12, 20, 38, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--ink);
  cursor: pointer;
  pointer-events: auto;
  transition: border-color 160ms ease, background-color 160ms ease, transform 160ms ease;
}

.hud__shop:hover,
.hud__shop:focus-visible {
  border-color: rgba(127, 232, 255, 0.55);
  background: rgba(20, 34, 60, 0.7);
  transform: translateY(-1px);
}

.hud__shop-icon {
  color: var(--neon);
  font-size: 11px;
}

/* --- Mağaza modalı ---------------------------------------------------- */

.shop {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  font-family: ui-sans-serif, system-ui, "Segoe UI", sans-serif;
}

.shop[hidden] {
  display: none;
}

.shop__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 7, 16, 0.62);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.shop__panel {
  position: relative;
  width: min(520px, calc(100vw - 40px));
  max-height: calc(100vh - 60px);
  overflow-y: auto;
  padding: 22px 24px 18px;
  border: 1px solid rgba(127, 232, 255, 0.22);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(18, 28, 52, 0.94), rgba(10, 16, 32, 0.94));
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(183, 156, 255, 0.06);
  color: var(--ink);
}

.shop__head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(158, 201, 240, 0.12);
}

.shop__title {
  flex: 1;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: 0.01em;
}

.shop__credits {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.7;
}

.shop__credits b {
  margin-left: 6px;
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--neon);
  opacity: 1;
}

.shop__close {
  width: 28px;
  height: 28px;
  border: 1px solid rgba(158, 201, 240, 0.2);
  border-radius: 8px;
  background: transparent;
  font: inherit;
  font-size: 17px;
  line-height: 1;
  color: var(--accent);
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease;
}

.shop__close:hover,
.shop__close:focus-visible {
  border-color: rgba(127, 232, 255, 0.5);
  color: var(--neon);
}

.shop__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  list-style: none;
}

.shop__item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 15px 2px;
  border-bottom: 1px solid rgba(158, 201, 240, 0.08);
}

.shop__item:last-child {
  border-bottom: none;
}

.shop__info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.shop__name {
  font-size: 14px;
  font-weight: 600;
}

.shop__desc {
  font-size: 12px;
  color: var(--accent);
  opacity: 0.55;
}

.shop__stat {
  margin-top: 3px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  opacity: 0.8;
}

.shop__stat b {
  color: var(--neon);
}

.shop__side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 9px;
}

.shop__pips {
  display: flex;
  gap: 4px;
}

.shop__pips i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(158, 201, 240, 0.2);
}

.shop__pips i.is-on {
  background: var(--neon);
  box-shadow: 0 0 6px rgba(127, 232, 255, 0.7);
}

.shop__buy {
  min-width: 104px;
  padding: 8px 14px;
  border: 1px solid rgba(127, 232, 255, 0.35);
  border-radius: 8px;
  background: rgba(127, 232, 255, 0.1);
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--neon);
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease;
}

.shop__buy:hover:not(:disabled),
.shop__buy:focus-visible:not(:disabled) {
  background: rgba(127, 232, 255, 0.2);
  border-color: rgba(127, 232, 255, 0.65);
}

.shop__buy:disabled {
  border-color: rgba(158, 201, 240, 0.14);
  background: transparent;
  color: rgba(158, 201, 240, 0.38);
  cursor: not-allowed;
}

.shop__foot {
  padding-top: 14px;
  font-size: 11px;
  color: var(--accent);
  opacity: 0.45;
}

/* --- Gezegen satırı ve bildirim --------------------------------------- */

.hud__planet {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 9px;
  margin-bottom: 1px;
  border-bottom: 1px solid rgba(158, 201, 240, 0.1);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.hud__planet-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  transition: background-color 400ms ease, box-shadow 400ms ease;
}

.hud__toast {
  position: absolute;
  top: 76px;
  left: 50%;
  padding: 10px 20px;
  border: 1px solid rgba(127, 232, 255, 0.28);
  border-radius: 999px;
  background: rgba(12, 22, 42, 0.62);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-size: 13px;
  font-weight: 600;
  color: var(--neon);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, -8px);
  transition: opacity 260ms ease, transform 260ms ease, visibility 260ms;
}

.hud__toast.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

/* --- Mağaza: seyahat bölümü ------------------------------------------- */

.shop__travel {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 6px;
  padding: 15px 14px;
  border: 1px solid rgba(183, 156, 255, 0.24);
  border-radius: 11px;
  background: rgba(183, 156, 255, 0.07);
}

.shop__travel .shop__stat b {
  color: #b79cff;
}

.shop__buy--travel {
  border-color: rgba(183, 156, 255, 0.4);
  background: rgba(183, 156, 255, 0.12);
  color: #d3c2ff;
}

.shop__buy--travel:hover:not(:disabled),
.shop__buy--travel:focus-visible:not(:disabled) {
  border-color: rgba(183, 156, 255, 0.7);
  background: rgba(183, 156, 255, 0.22);
}

.shop__done {
  width: 100%;
  text-align: center;
  font-size: 12px;
  color: #b79cff;
  opacity: 0.7;
}

/* --- İstasyon pusulası ------------------------------------------------ */

.compass {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 10px 5px 7px;
  border: 1px solid rgba(127, 232, 255, 0.2);
  border-radius: 999px;
  background: rgba(10, 18, 34, 0.42);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  font-family: ui-sans-serif, system-ui, "Segoe UI", sans-serif;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  transition: border-color 220ms ease, opacity 220ms ease;
}

.compass--edge {
  border-color: rgba(127, 232, 255, 0.45);
}

.compass__arrow {
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 9px solid var(--neon);
  filter: drop-shadow(0 0 4px rgba(127, 232, 255, 0.6));
}

.compass__text {
  display: flex;
  align-items: baseline;
  gap: 7px;
}

.compass__label {
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.6;
}

.compass__distance {
  font-size: 11px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}