* {
  box-sizing: border-box;
}

:root {
  --bg: #040713;
  --text: #f2f7ff;
  --muted: #8da4bb;
  --accent: #5bd4ff;
  --accent-2: #8a5dff;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: radial-gradient(circle at top, #182544 0%, var(--bg) 70%);
  color: var(--text);
  overflow: hidden;
}

.fullscreen-overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 0;
  background: rgba(2, 6, 16, 0.95);
  backdrop-filter: blur(12px);
}

.fullscreen-card {
  width: 100%;
  height: 100%;
  max-width: none;
  padding: clamp(20px, 4vw, 36px);
  border-radius: 0;
  border: 0;
  background: linear-gradient(135deg, rgba(4, 7, 19, 0.98), rgba(11, 22, 41, 0.98));
  box-shadow: none;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.overlay-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.overlay-label {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.72rem;
  font-weight: 700;
}

.overlay-title {
  margin: 12px 0 8px;
  font-size: clamp(1.25rem, 2.6vw, 1.8rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  animation: titleFloat 1.1s ease-out both;
}

.overlay-subtitle {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.98rem;
  animation: subtitleFade 1.2s ease-out both;
}

.banner-logo {
  width: min(460px, 78vw);
  height: auto;
  display: block;
  margin: 8px auto 0;
  filter: drop-shadow(0 18px 28px rgba(0, 0, 0, 0.35));
  animation: loadingBurst 1.2s cubic-bezier(0.2, 0.9, 0.3, 1.2) infinite;
  transform-origin: center;
}

.loading-bar {
  width: min(320px, 68vw);
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.11);
  overflow: hidden;
  margin-top: 18px;
}

.loading-bar span {
  display: block;
  width: 38%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  animation: loadBar 1.1s ease-in-out infinite;
}

@keyframes loadingBurst {
  0% {
    transform: scale(0.92);
    opacity: 0.8;
  }
  40% {
    transform: scale(1.04);
    opacity: 1;
  }
  70% {
    transform: scale(0.98);
    opacity: 0.95;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes titleFloat {
  0% {
    opacity: 0;
    transform: translateY(14px);
  }
  60% {
    opacity: 1;
    transform: translateY(-3px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes subtitleFade {
  0% {
    opacity: 0;
    transform: translateY(8px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes loadBar {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(160%);
  }
}

@media (max-width: 600px) {
  .overlay-head {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 6px;
  }

  .fullscreen-card {
    padding: 18px 16px;
    justify-content: center;
  }

  .overlay-title {
    font-size: 1.2rem;
    margin-top: 8px;
  }

  .overlay-subtitle {
    font-size: 0.92rem;
    padding: 0 8px;
  }

  .banner-logo {
    width: min(320px, 86vw);
  }
}