*, *::before, *::after {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: #000000;
}

body {
  min-height: 100vh;
  margin: 0;
  position: relative;
  color: #f7f7ff;
  font-family: "MS Gothic", "MS PGothic", "Osaka-Mono", "Courier New", monospace;
  font-size: 15px;
  line-height: 1.45;
  background-color: #000000;
  background-image:
    linear-gradient(90deg, rgba(0, 0, 0, 0.92) 0 170px, rgba(0, 0, 0, 0.38) 170px 100%),
    radial-gradient(circle at 84% 20%, rgba(96, 128, 255, 0.2), transparent 24rem),
    url("../stars.gif");
  background-repeat: repeat, no-repeat, repeat;
  background-size: auto, auto, 640px 400px;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  right: clamp(-190px, -12vw, -70px);
  bottom: clamp(-190px, -16vw, -90px);
  z-index: 0;
  width: clamp(420px, 54vw, 820px);
  aspect-ratio: 1;
  background: url("../assets/background/pixel-earth.gif") center / contain no-repeat;
  image-rendering: pixelated;
  opacity: 0.82;
  filter: drop-shadow(0 0 34px rgba(110, 150, 255, 0.42));
  pointer-events: none;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(to bottom, rgba(0, 0, 0, 0.2), #000000 110%),
    radial-gradient(circle at 55% 55%, rgba(255, 255, 255, 0.08), transparent 30rem);
  pointer-events: none;
}

a {
  color: inherit;
}

.top-strip {
  position: relative;
  z-index: 1;
  min-height: 84px;
  padding: 8px clamp(14px, 2vw, 28px);
  display: flex;
  align-items: center;
  gap: 18px;
  background: #000000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.72);
}

.site-title-image {
  display: block;
  width: min(620px, 72vw);
  height: auto;
  object-fit: contain;
}

.header-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(10px, 1.5vw, 24px);
  margin-left: 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
  white-space: nowrap;
}

.header-links a {
  text-decoration: none;
}

.header-links > * {
  flex: 0 0 auto;
}

.header-links a:hover,
.header-links a:focus-visible {
  color: #ffffff;
  text-decoration: underline;
  outline: none;
}

.header-ip {
  display: inline-flex;
  gap: 6px;
}

.header-ip-address {
  color: rgba(255, 255, 255, 0.58);
}

.version-note {
  margin-left: auto;
  color: rgba(255, 255, 255, 0.68);
  font-size: 13px;
  text-align: right;
  text-shadow: 0 1px 2px #000;
}

.page-shell {
  position: relative;
  z-index: 1;
  width: min(1120px, 100%);
  min-height: calc(100vh - 84px);
  padding: 18px 20px 96px 0;
  display: grid;
  grid-template-columns: 154px minmax(0, 1fr);
  gap: 24px;
}

.side-column {
  min-height: calc(100vh - 198px);
  padding: 0 0 0 10px;
  display: flex;
  flex-direction: column;
}

.side-nav {
  flex: 0 0 auto;
}

.side-nav a {
  display: block;
  min-height: 35px;
  padding: 6px 4px 4px 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 16px;
  line-height: 1.1;
  text-decoration: none;
  text-transform: uppercase;
  border-bottom: 2px solid rgba(255, 255, 255, 0.74);
  text-shadow: 0 1px 2px #000;
}

.side-nav a:hover,
.side-nav a:focus-visible {
  color: #ffffff;
  border-color: #9fb7ff;
  outline: none;
}

.side-copyright {
  margin-top: auto;
  padding: 22px 0 0;
  color: rgba(255, 255, 255, 0.42);
  font-size: 13px;
  text-shadow: 0 1px 2px #000;
}

.template-panel {
  width: min(690px, 100%);
  min-height: 520px;
  padding: 32px 26px 30px;
  color: #050505;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.85),
    14px 14px 0 rgba(0, 0, 0, 0.72),
    0 0 46px rgba(115, 145, 255, 0.28);
  text-shadow: none;
}

.page-title {
  margin: 0;
  display: grid;
  grid-template-columns: auto minmax(42px, 1fr);
  align-items: center;
  gap: 10px;
  color: #000000;
  font-family: "MS PGothic", "MS Gothic", monospace;
  font-size: clamp(26px, 4vw, 32px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0;
}

.page-title::after {
  content: "";
  height: 1px;
  background: #000000;
}

.command-bar {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 2;
  max-width: calc(100vw - 36px);
  padding: 6px 10px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.86);
  background: rgba(0, 0, 0, 0.74);
  border: 1px solid rgba(255, 255, 255, 0.55);
  font-size: 13px;
}

.music-toggle {
  min-width: 72px;
  padding: 2px 6px;
  color: rgba(255, 255, 255, 0.9);
  font: inherit;
  font-size: 12px;
  line-height: 1.2;
  background: #000000;
  border: 1px solid rgba(255, 255, 255, 0.55);
  cursor: pointer;
}

.music-toggle[aria-pressed="true"] {
  color: #000000;
  background: rgba(255, 255, 255, 0.88);
}

@media (max-width: 820px) {
  body {
    background-image:
      linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
      url("../stars.gif");
  }

  .top-strip {
    flex-wrap: wrap;
    padding-top: 8px;
    padding-bottom: 8px;
  }

  .header-links {
    width: 100%;
    margin-left: 0;
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .version-note {
    width: 100%;
    margin-left: 0;
    text-align: left;
  }

  .page-shell {
    padding: 16px;
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .side-column {
    padding: 0;
    min-height: 0;
  }

  .side-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 14px;
  }

  .side-copyright {
    margin-top: 16px;
    padding-top: 0;
  }

  .template-panel {
    width: 100%;
    min-height: 360px;
  }

  .command-bar {
    position: static;
    margin: 0 16px 16px;
  }
}

@media (max-width: 480px) {
  .template-panel {
    padding: 24px 16px 20px;
  }

  .side-nav {
    grid-template-columns: 1fr;
  }

  .page-title {
    grid-template-columns: 1fr;
  }

  .page-title::after {
    display: none;
  }
}