:root {
  --ink: #0f1720;
  --paper: #f6f8fb;
  --sea: #0b5c76;
  --sea-soft: #5cb7d1;
  --accent: #f4a259;
  --shadow: rgba(16, 34, 54, 0.2);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  color: var(--ink);
  background: radial-gradient(circle at 15% 20%, #e5f6ff 0%, #f6f8fb 45%, #e9eef5 100%);
  font-family: "Sora", sans-serif;
}

.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(135deg, rgba(92, 183, 209, 0.12) 0%, rgba(244, 162, 89, 0.1) 100%),
    repeating-linear-gradient(45deg, transparent 0 24px, rgba(11, 92, 118, 0.03) 24px 26px);
  animation: fadein 1s ease;
}

.layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-rows: auto 1fr;
  width: 100%;
  height: 100%;
  padding: 1rem;
  gap: 1rem;
}

.panel {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(11, 92, 118, 0.2);
  border-radius: 18px;
  padding: 0.9rem 1.1rem;
  box-shadow: 0 14px 36px var(--shadow);
  backdrop-filter: blur(6px);
  animation: slidein 0.7s ease;
}

.panel h1 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  letter-spacing: 0.01em;
  font-size: clamp(1.05rem, 2.2vw, 1.45rem);
}

.panel p {
  margin: 0.35rem 0 0;
  font-size: 0.93rem;
  color: rgba(15, 23, 32, 0.82);
}

.meta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 0.55rem;
  font-size: 0.85rem;
}

.meta span {
  background: rgba(11, 92, 118, 0.08);
  border: 1px solid rgba(11, 92, 118, 0.22);
  border-radius: 999px;
  padding: 0.25rem 0.6rem;
}

#centerBtn {
  margin-top: 0.7rem;
  border: 1px solid rgba(11, 92, 118, 0.35);
  background: linear-gradient(135deg, #0b5c76 0%, #1b7a90 100%);
  color: #f6f8fb;
  border-radius: 10px;
  padding: 0.5rem 0.9rem;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(11, 92, 118, 0.2);
  transition: transform 120ms ease, box-shadow 120ms ease, filter 120ms ease;
}

#centerBtn:hover {
  transform: translateY(-1px);
  box-shadow: 0 11px 22px rgba(11, 92, 118, 0.28);
  filter: brightness(1.05);
}

#centerBtn:active {
  transform: translateY(0);
  box-shadow: 0 6px 14px rgba(11, 92, 118, 0.2);
}

#cesiumContainer {
  width: 100%;
  height: 100%;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(11, 92, 118, 0.22);
  box-shadow: 0 18px 42px var(--shadow);
  animation: rise 1s ease;
}

@keyframes slidein {
  from {
    transform: translateY(-10px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes rise {
  from {
    transform: translateY(14px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@media (max-width: 768px) {
  .layout {
    padding: 0.6rem;
    gap: 0.6rem;
  }

  .panel {
    border-radius: 14px;
    padding: 0.8rem;
  }

  #cesiumContainer {
    border-radius: 14px;
  }
}