:root {
  --bt-orange: #ff5e00;
  --bt-orange-soft: #ff7a1a;
  --bt-black: #030303;
  --bt-white: #ffffff;
  --bt-muted: #b8b8b8;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  width: 100%;
  min-height: 100%;
  background: var(--bt-black);
  color: var(--bt-white);
  font-family: Inter, Arial, Helvetica, sans-serif;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
}

.bt-landing {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  background:
    radial-gradient(circle at center, rgba(255, 94, 0, 0.18), transparent 34%),
    radial-gradient(circle at bottom, rgba(255, 94, 0, 0.12), transparent 42%),
    linear-gradient(180deg, #050505 0%, #000000 100%);
  overflow: hidden;
}

.bt-landing::before {
  content: "";
  position: absolute;
  inset: -20%;
  background:
    linear-gradient(115deg, transparent 0%, transparent 45%, rgba(255, 94, 0, 0.18) 49%, transparent 54%, transparent 100%);
  animation: btScan 5s ease-in-out infinite;
  pointer-events: none;
}

.bt-landing::after {
  content: "";
  position: absolute;
  width: 120vw;
  height: 120vw;
  max-width: 1100px;
  max-height: 1100px;
  border: 1px solid rgba(255, 94, 0, 0.14);
  border-radius: 50%;
  animation: btPulseRing 4s ease-in-out infinite;
  pointer-events: none;
}

.bt-content {
  position: relative;
  z-index: 3;
  width: 100%;
  max-width: 920px;
  text-align: center;
}

.bt-logo-wrap {
  position: relative;
  width: clamp(120px, 26vw, 210px);
  height: clamp(120px, 26vw, 210px);
  margin: 0 auto 34px;
  border-radius: 50%;
  background: var(--bt-orange);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow:
    0 0 40px rgba(255, 94, 0, 0.55),
    0 0 120px rgba(255, 94, 0, 0.24);
  animation: btLogoReveal 1.3s ease forwards, btLogoFloat 4.5s ease-in-out infinite 1.4s;
}

.bt-logo-wrap img {
  width: 82%;
  height: 82%;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 8px 16px rgba(0,0,0,0.28));
}

.bt-logo-fallback {
  font-size: clamp(54px, 13vw, 110px);
  font-weight: 950;
  line-height: 1;
  letter-spacing: -0.09em;
  color: var(--bt-white);
  font-style: italic;
}

.bt-kicker {
  color: var(--bt-orange-soft);
  font-size: clamp(12px, 2vw, 15px);
  font-weight: 800;
  letter-spacing: 0.38em;
  text-transform: uppercase;
  margin-bottom: 18px;
  opacity: 0;
  animation: btTextUp 0.9s ease forwards 0.35s;
}

.bt-title {
  font-size: clamp(42px, 10vw, 104px);
  line-height: 0.92;
  font-weight: 950;
  letter-spacing: -0.07em;
  text-transform: uppercase;
  margin-bottom: 22px;
  opacity: 0;
  animation: btTextUp 0.9s ease forwards 0.65s;
}

.bt-title span {
  color: var(--bt-orange);
}

.bt-subtitle {
  max-width: 680px;
  margin: 0 auto;
  color: rgba(255,255,255,0.78);
  font-size: clamp(16px, 2.8vw, 22px);
  line-height: 1.45;
  font-weight: 500;
  opacity: 0;
  animation: btTextUp 0.9s ease forwards 0.95s;
}

.bt-coming {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 34px;
  padding: 14px 22px;
  border-radius: 999px;
  border: 1px solid rgba(255, 94, 0, 0.45);
  background: rgba(255, 94, 0, 0.10);
  color: var(--bt-white);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  backdrop-filter: blur(14px);
  opacity: 0;
  animation: btTextUp 0.9s ease forwards 1.25s;
}

.bt-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--bt-orange);
  box-shadow: 0 0 18px rgba(255, 94, 0, 0.95);
  animation: btBlink 1.2s ease-in-out infinite;
}

.bt-footer-note {
  position: absolute;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  z-index: 4;
  width: 100%;
  padding: 0 24px;
  text-align: center;
  color: rgba(255,255,255,0.48);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.bt-road {
  position: absolute;
  left: 50%;
  bottom: -80px;
  transform: translateX(-50%);
  width: min(820px, 90vw);
  height: 260px;
  border-radius: 50% 50% 0 0;
  border-top: 3px solid rgba(255,255,255,0.12);
  opacity: 0.8;
  z-index: 1;
}

.bt-road::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -3px;
  width: 58%;
  height: 3px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, var(--bt-orange), transparent);
  filter: blur(1px);
}

@keyframes btLogoReveal {
  0% {
    opacity: 0;
    transform: scale(0.78) rotate(-8deg);
  }
  100% {
    opacity: 1;
    transform: scale(1) rotate(0deg);
  }
}

@keyframes btLogoFloat {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes btTextUp {
  0% {
    opacity: 0;
    transform: translateY(24px);
    filter: blur(8px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

@keyframes btScan {
  0%, 100% {
    transform: translateX(-18%);
    opacity: 0.25;
  }
  50% {
    transform: translateX(18%);
    opacity: 0.8;
  }
}

@keyframes btPulseRing {
  0%, 100% {
    transform: scale(0.96);
    opacity: 0.35;
  }
  50% {
    transform: scale(1.04);
    opacity: 0.12;
  }
}

@keyframes btBlink {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.35;
    transform: scale(0.75);
  }
}

@media (max-width: 640px) {
  .bt-landing {
    padding: 22px;
    align-items: center;
  }

  .bt-logo-wrap {
    margin-bottom: 28px;
  }

  .bt-title {
    letter-spacing: -0.055em;
  }

  .bt-subtitle {
    max-width: 92%;
  }

  .bt-coming {
    margin-top: 28px;
    font-size: 11px;
    padding: 13px 18px;
  }

  .bt-footer-note {
    bottom: 18px;
    font-size: 10px;
  }
}
.glow-effect {
    text-shadow:
        0 0 10px rgba(255,94,0,0.5),
        0 0 20px rgba(255,94,0,0.4),
        0 0 40px rgba(255,94,0,0.2);
}