:root {
  color-scheme: light;
  font-family:
    Pretendard,
    "Noto Sans KR",
    "Apple SD Gothic Neo",
    "Malgun Gothic",
    Arial,
    sans-serif;
  background: #0b1422;
}

* {
  box-sizing: border-box;
}

html,
body,
#kb-app {
  width: 100%;
  height: 100%;
}

html,
body {
  margin: 0;
  padding: 0;
  overflow: hidden;
}

body {
  background: #0b1422;
}

#kb-app {
  position: fixed;
  inset: 0;
  min-width: 320px;
  min-height: 320px;
}

#unity-canvas {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  outline: 0;
  background: #0b1422;
}

#kb-runtime-brand {
  position: fixed;
  z-index: 5;
  top: max(14px, env(safe-area-inset-top));
  left: max(20px, env(safe-area-inset-left));
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: #f2f5f8;
  font-size: clamp(17px, 1.65vw, 23px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.28);
  transition: opacity 160ms ease, visibility 160ms ease;
}

#kb-runtime-brand.is-visible {
  opacity: 1;
  visibility: visible;
}

.kb-runtime-brand-kb {
  color: #ffb000;
  font-size: 1.12em;
  font-weight: 800;
  letter-spacing: -0.03em;
}

#kb-loading {
  position: fixed;
  z-index: 20;
  inset: 0;
  display: grid;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top))
    max(24px, env(safe-area-inset-right))
    max(24px, env(safe-area-inset-bottom))
    max(24px, env(safe-area-inset-left));
  background: #ffffff;
  opacity: 1;
  visibility: visible;
  transition: opacity 240ms ease, visibility 240ms ease;
}

#kb-loading.is-hidden {
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
}

.kb-loading-card {
  display: flex;
  width: min(360px, 84vw);
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.kb-logo {
  display: block;
  width: 140px;
  height: 140px;
  object-fit: contain;
}

.kb-loading-card h1 {
  margin: 8px 0 0;
  color: #252525;
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  letter-spacing: -0.04em;
}

#kb-loading-status {
  margin: 12px 0 28px;
  color: #666666;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

#kb-progress-track {
  width: min(300px, 76vw);
  height: 6px;
  overflow: hidden;
  border-radius: 999px;
  background: #ece8e2;
}

#kb-progress-bar {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: #ffb000;
  transition: width 120ms ease-out;
}

#kb-progress-label {
  min-height: 18px;
  margin: 10px 0 0;
  color: #777777;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

#kb-loading.has-error #kb-progress-track {
  display: none;
}

#kb-loading.has-error #kb-progress-label {
  color: #a32323;
  font-size: 14px;
}

#unity-warning {
  position: fixed;
  z-index: 30;
  top: max(16px, env(safe-area-inset-top));
  left: 50%;
  display: none;
  width: min(680px, calc(100vw - 32px));
  transform: translateX(-50%);
}

#unity-warning.is-visible {
  display: grid;
  gap: 8px;
}

.kb-notice {
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 12px 16px;
  color: #ffffff;
  background: rgba(22, 30, 42, 0.96);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.22);
  font-size: 14px;
  line-height: 1.45;
  white-space: pre-wrap;
}

.kb-notice-warning {
  color: #3b2a00;
  background: #fff0b8;
}

.kb-notice-error {
  color: #ffffff;
  background: #9b2424;
}

#kb-fullscreen-button {
  position: fixed;
  z-index: 10;
  right: max(16px, env(safe-area-inset-right));
  bottom: max(16px, env(safe-area-inset-bottom));
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 12px;
  color: #ffffff;
  background: rgba(11, 20, 34, 0.72);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.22);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  backdrop-filter: blur(8px);
  transition: background 120ms ease, opacity 160ms ease,
    visibility 160ms ease;
}

#kb-fullscreen-button.is-visible {
  opacity: 1;
  visibility: visible;
}

#kb-fullscreen-button:hover,
#kb-fullscreen-button:focus-visible {
  background: rgba(28, 44, 64, 0.94);
}

#kb-fullscreen-button:focus-visible {
  outline: 2px solid #ffb000;
  outline-offset: 2px;
}

#kb-fullscreen-button span {
  font-size: 24px;
  line-height: 1;
  transform: translateY(-1px);
}

@media (max-width: 520px), (max-height: 520px) {
  .kb-logo {
    width: 112px;
    height: 112px;
  }

  .kb-loading-card h1 {
    margin-top: 4px;
    font-size: 24px;
  }

  #kb-loading-status {
    margin: 8px 0 20px;
    font-size: 14px;
  }

  #kb-runtime-brand {
    top: max(12px, env(safe-area-inset-top));
    left: max(14px, env(safe-area-inset-left));
    gap: 6px;
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  #kb-loading,
  #kb-progress-bar,
  #kb-runtime-brand,
  #kb-fullscreen-button {
    transition: none;
  }
}