* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, #111820 0%, #050708 45%, #000 100%);
  color: #7eeaff;
  font-family: "Courier New", monospace;
  letter-spacing: 2px;
}

.screen {
  max-width: 980px;
  min-height: 100vh;
  margin: 0 auto;
  padding: 28px;
  background:
    linear-gradient(rgba(126,234,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126,234,255,0.035) 1px, transparent 1px),
    #030607;
  background-size: 36px 36px;
  border-left: 1px solid rgba(126,234,255,0.12);
  border-right: 1px solid rgba(126,234,255,0.12);
  box-shadow: 0 0 40px rgba(0, 217, 255, 0.12);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 26px;
  border-bottom: 1px solid rgba(126,234,255,0.16);
}

.mini-logo {
  color: #36dfff;
  font-size: 24px;
  text-shadow: 0 0 12px rgba(54,223,255,0.85);
  border: 1px solid rgba(54,223,255,0.5);
  padding: 8px 10px;
}

.links a {
  margin-left: 28px;
  color: #b8f5ff;
  text-decoration: none;
  font-size: 14px;
  text-transform: uppercase;
}

.links a:hover {
  color: #ffffff;
  text-shadow: 0 0 10px #36dfff;
}

.hero {
  text-align: center;
  padding: 72px 20px 42px;
}

.optic {
  position: relative;
  width: 120px;
  height: 44px;
  margin: 0 auto 20px;
}

.optic span::before,
.optic span::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border-color: #36dfff;
  filter: drop-shadow(0 0 6px #36dfff);
}

.optic span:first-child::before {
  left: 0;
  top: 0;
  border-top: 2px solid;
  border-left: 2px solid;
}

.optic span:first-child::after {
  right: 0;
  top: 0;
  border-top: 2px solid;
  border-right: 2px solid;
}

.optic span:last-of-type::before {
  left: 0;
  bottom: 0;
  border-bottom: 2px solid;
  border-left: 2px solid;
}

.optic span:last-of-type::after {
  right: 0;
  bottom: 0;
  border-bottom: 2px solid;
  border-right: 2px solid;
}

.optic b {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  color: #36dfff;
  font-size: 24px;
  font-weight: 400;
}

.number {
  font-size: clamp(110px, 20vw, 220px);
  line-height: 0.85;
  color: #8df3ff;
  text-shadow:
    0 0 8px rgba(54,223,255,0.9),
    0 0 24px rgba(54,223,255,0.35);
  font-weight: 200;
}

h1 {
  margin: 34px 0 12px;
  font-size: clamp(28px, 6vw, 56px);
  text-transform: uppercase;
  font-weight: 400;
  letter-spacing: 14px;
  color: #36dfff;
  text-shadow: 0 0 14px rgba(54,223,255,0.8);
}

.subtitle {
  color: #4cbfe1;
  text-transform: uppercase;
  margin-bottom: 46px;
}

.panel {
  max-width: 680px;
  margin: 0 auto 48px;
  padding: 28px;
  border: 1px solid rgba(54,223,255,0.65);
  color: #aef6ff;
  box-shadow: inset 0 0 20px rgba(54,223,255,0.06);
}

.panel p {
  margin: 10px 0;
}

.buttons {
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}

.buttons a,
.back {
  min-width: 240px;
  padding: 20px 28px;
  border: 1px solid rgba(126,234,255,0.35);
  color: #36dfff;
  text-decoration: none;
  text-transform: uppercase;
  background: rgba(0,0,0,0.35);
  box-shadow: inset 0 0 12px rgba(54,223,255,0.04);
}

.buttons a:hover,
.back:hover {
  background: rgba(54,223,255,0.08);
  box-shadow: 0 0 18px rgba(54,223,255,0.25);
}

footer {
  display: flex;
  justify-content: space-between;
  margin-top: 80px;
  padding-top: 28px;
  border-top: 1px solid rgba(126,234,255,0.16);
  color: #258fb0;
  text-transform: uppercase;
  font-size: 13px;
}

.content {
  max-width: 720px;
  margin: 0 auto;
  padding: 58px 18px;
}

.content h1 {
  text-align: center;
  font-size: clamp(28px, 5vw, 42px);
  letter-spacing: 10px;
}

.line {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin: 20px 0 52px;
  color: #36dfff;
}

.line span {
  width: 120px;
  height: 1px;
  background: rgba(54,223,255,0.4);
}

.content h2 {
  margin-top: 34px;
  color: #36dfff;
  font-size: 18px;
  font-weight: 400;
  text-transform: uppercase;
}

.content h2::before {
  content: "⌜ ";
}

.content p {
  color: #a8c7d1;
  line-height: 1.8;
  letter-spacing: 1px;
}

.back {
  display: inline-block;
  margin-top: 42px;
  text-align: center;
}

@media (max-width: 700px) {
  nav {
    flex-direction: column;
    gap: 22px;
  }

  .links a {
    display: block;
    margin: 12px 0;
  }

  h1 {
    letter-spacing: 8px;
  }

  footer {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}