:root {
  --bg: #0c1118;
  --panel: rgba(18, 25, 35, 0.86);
  --panel-border: rgba(255, 255, 255, 0.13);
  --text: #f4f7fb;
  --muted: #aeb8c7;
  --accent: #f4b400;
  --accent-light: #ffd866;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  grid-template-rows: 1fr auto;
  overflow-x: hidden;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 20% 20%, rgba(0, 180, 255, 0.18), transparent 34%),
    radial-gradient(circle at 80% 15%, rgba(244, 180, 0, 0.15), transparent 28%),
    linear-gradient(145deg, #0c1118 0%, #121c28 48%, #0b1016 100%);
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  opacity: 0.25;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 34px 34px;
}

body::after {
  background: radial-gradient(circle at center, transparent 30%, rgba(0, 0, 0, 0.42) 100%);
}

.launcher {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 100%;
  min-height: calc(100vh - 60px);
  padding: 2rem;
}

.launcher-panel {
  width: min(620px, 100%);
  padding: clamp(2rem, 5vw, 4rem);
  text-align: center;
  border: 1px solid var(--panel-border);
  border-radius: 28px;
  background: var(--panel);
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.48),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(18px);
  animation: panel-in 650ms ease-out both;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent-light);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  line-height: 0.95;
  text-transform: uppercase;
}

h1 span {
  display: block;
  font-size: clamp(3.2rem, 12vw, 6.3rem);
  letter-spacing: -0.055em;
  text-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

h1 small {
  display: block;
  margin-top: 0.8rem;
  color: var(--accent-light);
  font-size: clamp(1rem, 3vw, 1.55rem);
  letter-spacing: 0.16em;
}

.subtitle {
  margin: 1.5rem 0 2.2rem;
  color: var(--muted);
  font-size: clamp(1rem, 2.6vw, 1.25rem);
  letter-spacing: 0.08em;
}

.play-button {
  display: inline-grid;
  place-items: center;
  min-width: min(280px, 100%);
  min-height: 64px;
  padding: 0.9rem 2.4rem;
  border: 1px solid rgba(255, 226, 135, 0.72);
  border-radius: 16px;
  background: linear-gradient(180deg, #ffd85e, var(--accent));
  color: #17130a;
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
  box-shadow:
    0 12px 30px rgba(244, 180, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.65);
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    filter 160ms ease;
  animation: button-glow 2.6s ease-in-out infinite;
}

.play-button:hover {
  transform: translateY(-3px) scale(1.02);
  filter: brightness(1.06);
  box-shadow:
    0 18px 40px rgba(244, 180, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

.play-button:active {
  transform: translateY(0) scale(0.99);
}

.play-button:focus-visible {
  outline: 4px solid rgba(255, 216, 102, 0.35);
  outline-offset: 5px;
}

.feature-line {
  margin: 1.6rem 0 0;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.version {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: 0.78rem;
}

footer {
  position: relative;
  z-index: 1;
  padding: 1rem 1.25rem;
  color: rgba(228, 234, 243, 0.62);
  text-align: center;
  font-size: 0.76rem;
}

footer p {
  margin: 0;
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes button-glow {
  0%,
  100% {
    box-shadow:
      0 12px 30px rgba(244, 180, 0, 0.25),
      inset 0 1px 0 rgba(255, 255, 255, 0.65);
  }
  50% {
    box-shadow:
      0 16px 42px rgba(244, 180, 0, 0.44),
      inset 0 1px 0 rgba(255, 255, 255, 0.75);
  }
}

@media (max-width: 560px) {
  .launcher {
    padding: 1rem;
  }

  .launcher-panel {
    padding: 2.25rem 1.3rem;
    border-radius: 22px;
  }

  h1 span {
    font-size: clamp(3rem, 18vw, 4.7rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}