/* -------------------------------------------------
   GLOBAL RESET & TYPO
-------------------------------------------------- */

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: radial-gradient(circle at top, #050916 0%, #020309 45%, #000 100%);
  color: #eaf4ff;
}

/* utility */

.hidden {
  display: none !important;
}

/* -------------------------------------------------
   BUTTONS – neon game style
-------------------------------------------------- */

.btn {
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid rgba(120, 200, 255, 0.55);
  cursor: pointer;
  background: radial-gradient(circle at top left, #181c2a 0%, #070915 55%, #050612 100%);
  color: #f3fbff;
  font-size: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-shadow:
    0 0 6px rgba(0, 200, 255, 0.7),
    0 0 16px rgba(0, 100, 255, 0.6);
  box-shadow:
    0 0 0 1px rgba(0, 120, 255, 0.25),
    0 0 22px rgba(0, 180, 255, 0.35);
  transition:
    background 0.2s ease,
    transform 0.1s ease,
    box-shadow 0.2s ease,
    opacity 0.2s ease;
}

.btn.primary {
  background: linear-gradient(135deg, #00c8ff, #8a5bff);
  box-shadow:
    0 0 0 1px rgba(0, 180, 255, 0.4),
    0 0 26px rgba(0, 200, 255, 0.75);
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow:
    0 0 0 1px rgba(160, 230, 255, 0.55),
    0 0 30px rgba(0, 220, 255, 0.9);
}

.btn:active:not(:disabled) {
  transform: translateY(1px) scale(0.99);
  box-shadow:
    0 0 0 1px rgba(0, 120, 255, 0.4),
    0 0 16px rgba(0, 160, 255, 0.6);
}

.btn:disabled {
  opacity: 0.45;
  cursor: default;
  box-shadow: none;
}

/* -------------------------------------------------
   GLOBAL AUDIO
-------------------------------------------------- */

/* schováme default ovládání audio elementu,
   hudba se ovládá HUD/UI tlačítky */
audio {
  display: none;
}
/* -------------------------------------------------
   GLOBAL RESPONSIVE
-------------------------------------------------- */

/* základ */
html {
  font-size: 16px;
}

/* menší notebooky / tablety na šířku */
@media (max-width: 1200px) {
  html {
    font-size: 15px;
  }
}

/* mobily / tablety na výšku */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  body {
    overflow: hidden;
  }
}

/* úplně malé mobily */
@media (max-width: 480px) {
  html {
    font-size: 13px;
  }
}

/* velké / ultraširoké monitory */
@media (min-width: 1800px) {
  html {
    font-size: 17px;
  }
}
@media (min-width: 2200px) {
  html {
    font-size: 18px;
  }
}

/* dotyk – žádné scrollování / zoomování během hry */
html,
body {
  touch-action: none;
}