@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap');

:root {
  --bg-900: #030712;
  --bg-800: rgba(7, 13, 29, 0.92);
  --bg-700: rgba(12, 27, 49, 0.78);
  --surface: rgba(18, 36, 66, 0.72);
  --surface-strong: rgba(26, 54, 102, 0.86);
  --accent: #29d6ff;
  --accent-strong: #14a5ff;
  --accent-soft: rgba(41, 214, 255, 0.18);
  --accent-magenta: #ff58d6;
  --accent-gold: #ffe066;
  --text-primary: #f5f8ff;
  --text-muted: rgba(219, 229, 255, 0.72);
  --border-glass: rgba(82, 143, 255, 0.35);
  --shadow-soft: 0 32px 70px rgba(4, 9, 24, 0.65);
  --shadow-intense: 0 24px 80px rgba(20, 120, 255, 0.35);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 12px;
  --blur-backdrop: 18px;
  --transition-speed: 0.3s;
}

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

body {
  font-family: 'Roboto', 'Segoe UI', sans-serif;
  margin: 0;
  color: var(--text-primary);
  background:
    radial-gradient(circle at top, rgba(20, 60, 120, 0.35) 0%, rgba(9, 20, 46, 0.0) 45%),
    radial-gradient(circle at 20% 20%, rgba(255, 88, 214, 0.18) 0%, rgba(255, 88, 214, 0.0) 50%),
    radial-gradient(circle at 80% 10%, rgba(41, 214, 255, 0.25) 0%, rgba(41, 214, 255, 0.0) 55%),
    #030712;
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  padding-left: env(safe-area-inset-left, 0);
  padding-right: env(safe-area-inset-right, 0);
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, rgba(20, 112, 255, 0.12), rgba(255, 88, 214, 0.08));
  pointer-events: none;
  mix-blend-mode: screen;
  z-index: -2;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-speed);
}

a:hover {
  color: var(--accent-strong);
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: clamp(20px, 4vw, 36px);
}

.site-header {
  position: relative;
  padding: clamp(36px, 6vw, 64px) 0;
  min-height: 90vh;
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 24px;
  margin-bottom: clamp(40px, 7vw, 80px);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(21, 39, 71, 0.85), rgba(9, 18, 33, 0.85));
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(var(--blur-backdrop));
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(0.8rem, 2vw, 1rem);
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--text-primary);
}

.brand-mark {
  color: var(--accent);
}

.brand-sub {
  color: var(--accent-magenta);
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: clamp(16px, 4vw, 28px);
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-magenta));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-speed);
}

.nav-links a:focus-visible,
.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  transform: scaleX(1);
}

.nav-cta {
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 80%);
  box-shadow: var(--shadow-intense);
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(32px, 6vw, 64px);
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(2.6rem, 6vw, 3.8rem);
  margin: 0 0 16px;
  letter-spacing: -1px;
}

.hero-copy p {
  margin: 0 0 24px;
  color: var(--text-muted);
  font-size: clamp(1rem, 2.4vw, 1.1rem);
}

.eyebrow {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.4em;
  color: var(--accent);
  margin-bottom: 18px;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: rgba(12, 28, 56, 0.6);
  font-weight: 600;
  font-size: 1rem;
  font-family: inherit;
  cursor: pointer;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed), background var(--transition-speed);
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0));
  opacity: 0;
  transition: opacity var(--transition-speed);
}

.btn:hover::after,
.btn:focus-visible::after {
  opacity: 1;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent) 10%, var(--accent-strong) 90%);
  color: var(--text-primary);
  box-shadow: var(--shadow-intense);
}

.btn.ghost {
  background: rgba(16, 32, 64, 0.6);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  backdrop-filter: blur(var(--blur-backdrop));
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px) scale(1.02);
}

.btn:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 3px;
}

.hero-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin: 0;
}

.hero-highlights dt {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--accent-magenta);
}

.hero-highlights dd {
  margin: 10px 0 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.highlight-card {
  padding: 18px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(var(--blur-backdrop));
}

.hero-visual {
  position: relative;
}

.hero-holo {
  position: relative;
  display: block;
  padding: clamp(20px, 4vw, 36px);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(17, 34, 68, 0.8), rgba(8, 16, 32, 0.92));
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  color: var(--text-primary);
  text-decoration: none;
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.hero-holo:hover,
.hero-holo:focus-visible {
  transform: translateY(-6px) scale(1.01);
  box-shadow: var(--shadow-intense);
}

.hero-holo:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 6px;
}

.hero-holo img {
  border-radius: var(--radius-md);
}

.hero-holo::before {
  content: '';
  position: absolute;
  inset: 12px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(41, 214, 255, 0.3);
  pointer-events: none;
}

.hero-holo::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(41, 214, 255, 0.25), transparent 60%);
  mix-blend-mode: screen;
  pointer-events: none;
}

main {
  position: relative;
  z-index: 1;
  padding-bottom: clamp(40px, 8vw, 100px);
}

.panel {
  margin-bottom: clamp(40px, 7vw, 80px);
  padding: clamp(28px, 5vw, 48px);
  border-radius: var(--radius-lg);
  background: var(--surface-strong);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(var(--blur-backdrop));
}

.section-header h2 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 5vw, 2.6rem);
}

.section-header p {
  margin: 0 0 24px;
  color: var(--text-muted);
  max-width: 720px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: clamp(24px, 4vw, 32px);
}

.feature-card {
  padding: 24px;
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(16, 38, 72, 0.85), rgba(9, 17, 30, 0.85));
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.feature-card:hover,
.feature-card:focus-within {
  transform: translateY(-6px);
  box-shadow: 0 26px 60px rgba(20, 120, 255, 0.25);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(41, 214, 255, 0.16), rgba(255, 88, 214, 0.16));
  margin-bottom: 20px;
  font-size: 1.4rem;
}

.game-panel {
  position: relative;
  overflow: hidden;
}

.game-panel::after {
  content: '';
  position: absolute;
  inset: -30%;
  background: radial-gradient(circle, rgba(41, 214, 255, 0.12), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.game-container {
  position: relative;
  z-index: 1;
  padding: clamp(12px, 3vw, 18px);
}

#gameArea {
  position: relative;
  width: 100%;
  height: clamp(280px, 52vh, 460px);
  background: rgba(5, 12, 24, 0.75);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(41, 214, 255, 0.25);
  box-shadow: 0 0 40px rgba(41, 214, 255, 0.12);
  overflow: hidden;
}

#gameArea::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('../images/stargate-bg.png');
  background-size: clamp(90px, 14vw, 140px);
  background-repeat: repeat;
  opacity: 0.2;
  mix-blend-mode: screen;
}

#gameArea::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(12, 28, 60, 0.7), rgba(3, 6, 16, 0.9));
  pointer-events: none;
}

#stargate {
  width: clamp(64px, 16vw, 108px);
  height: clamp(64px, 16vw, 108px);
  position: absolute;
  cursor: pointer;
  transform: translate(-50%, -50%);
  background-image: url('../images/stargate.png');
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  z-index: 2;
  transition: transform 0.2s ease-out, filter 0.2s ease-out;
  filter: drop-shadow(0 0 18px rgba(41, 214, 255, 0.7));
}

#stargate::after {
  content: '';
  position: absolute;
  inset: -26px;
  border-radius: 50%;
  border: 1px solid rgba(41, 214, 255, 0.5);
  box-shadow: 0 0 25px rgba(41, 214, 255, 0.3);
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

#stargate:active {
  transform: translate(-50%, -50%) scale(1.08);
}

#stargate:active::after {
  opacity: 1;
}

.ripple {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(41, 214, 255, 0.5);
  transform: translate(-50%, -50%);
  animation: ripple 0.6s ease-out;
}

@keyframes ripple {
  to {
    width: 240px;
    height: 240px;
    opacity: 0;
  }
}

.progress-bar {
  position: relative;
  width: 100%;
  height: 22px;
  border-radius: 999px;
  border: 1px solid rgba(41, 214, 255, 0.35);
  background: rgba(10, 20, 42, 0.75);
  box-shadow: inset 0 0 12px rgba(0, 0, 0, 0.45), 0 18px 30px rgba(18, 60, 120, 0.35);
  overflow: hidden;
  margin: clamp(28px, 4vw, 40px) auto;
  z-index: 1;
}

.progress-bar::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  pointer-events: none;
}

.progress-bar-markers {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 12px;
  pointer-events: none;
}

.progress-bar-markers span {
  width: 2px;
  height: 60%;
  background: rgba(255, 255, 255, 0.22);
}

.progress-bar-inner {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(255, 88, 214, 0.9), var(--accent));
  box-shadow: 0 0 25px rgba(41, 214, 255, 0.6);
  transition: width 0.3s ease-out;
}

.hud-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 18px;
  margin-top: clamp(28px, 4vw, 36px);
  z-index: 1;
}

.scoreboard {
  padding: 20px;
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(13, 28, 58, 0.82), rgba(7, 16, 36, 0.9));
  border: 1px solid var(--border-glass);
  box-shadow: 0 20px 45px rgba(9, 18, 36, 0.55);
  text-transform: uppercase;
  font-family: 'Press Start 2P', monospace;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.score-label {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.65);
}

.score-value {
  font-size: clamp(1.4rem, 4vw, 1.8rem);
  color: var(--accent);
  text-shadow: 0 0 18px rgba(41, 214, 255, 0.6);
}

.score-unit {
  font-size: 0.55em;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.6);
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: clamp(24px, 4vw, 32px);
  margin-top: clamp(32px, 5vw, 48px);
}

.meta-card {
  padding: 24px;
  border-radius: var(--radius-md);
  background: linear-gradient(170deg, rgba(12, 28, 56, 0.82), rgba(5, 12, 26, 0.9));
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-soft);
  min-height: 220px;
}

.meta-header h3 {
  margin: 0 0 8px;
}

.meta-header p {
  margin: 0 0 16px;
  color: var(--text-muted);
}

#achievements,
#leaderboard {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

#achievements li,
#leaderboard li {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: rgba(18, 36, 66, 0.75);
  border: 1px solid rgba(41, 214, 255, 0.18);
  color: var(--text-muted);
}

#leaderboard li {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.how-to-play {
  margin-top: clamp(32px, 5vw, 48px);
  padding: clamp(24px, 4vw, 36px);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(14, 32, 60, 0.85), rgba(6, 15, 32, 0.9));
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-soft);
}

.how-to-play h3 {
  margin-top: 0;
}

.how-to-play ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  color: var(--text-muted);
}

.highlight-text {
  color: var(--accent-gold);
}

.share-container {
  margin-top: clamp(28px, 4vw, 40px);
  display: flex;
  justify-content: center;
}

.twitter-share-button {
  min-width: 240px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.contact-panel {
  text-align: center;
}

footer {
  background: rgba(5, 10, 22, 0.92);
  border-top: 1px solid var(--border-glass);
  padding: clamp(20px, 4vw, 32px) 0;
  text-align: center;
  color: var(--text-muted);
  backdrop-filter: blur(var(--blur-backdrop));
}

#starfield {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -3;
  pointer-events: none;
}

@media (max-width: 1024px) {
  .nav-bar {
    flex-wrap: wrap;
  }

  .nav-cta {
    margin-left: auto;
  }
}

@media (max-width: 768px) {
  .site-header {
    min-height: auto;
    padding: clamp(28px, 7vw, 48px) 0 32px;
  }

  .nav-bar {
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: clamp(24px, 6vw, 40px);
  }

  .nav-links {
    width: 100%;
    justify-content: space-between;
  }

  .cta-group {
    width: 100%;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
    gap: clamp(24px, 7vw, 40px);
  }

  .hero-copy {
    max-width: 520px;
    margin: 0 auto;
  }

  .hero-visual {
    max-width: 360px;
    margin: 0 auto;
  }

  .hero-highlights {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }

  .panel {
    margin-bottom: clamp(28px, 7vw, 48px);
  }

  .game-panel {
    margin-top: 0;
  }

  .hud-grid {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }

  #gameArea {
    height: clamp(260px, 50vh, 360px);
  }
}

@media (max-width: 540px) {
  .site-header {
    min-height: auto;
  }

  .hero-copy h1 {
    font-size: clamp(2.2rem, 9vw, 2.8rem);
  }

  .nav-links {
    flex-direction: column;
    gap: 12px;
  }

  .nav-cta {
    align-self: stretch;
    text-align: center;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .meta-grid {
    grid-template-columns: 1fr;
  }

  .hero-highlights {
    grid-template-columns: 1fr;
  }
}