body {
  margin: 0;
  height: 100vh;
  justify-content: center;
  align-items: center;
  font-family: sans-serif;
  color: white;
}

.building h1 {
  margin-top: 0;
}

.back {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 20px;

  background: #2c6cff;
  color: white;

  text-decoration: none;
  border-radius: 6px;

  transition: 0.2s;
}

.back:hover {
  background: #4a85ff;
}

.progress-bar {
  width: 100%;
  height: 10px;

  background: #2a1a0b;
  border: 1px solid #8b6a3c;

  margin-top: 6px;
}

.progress-fill {
  height: 100%;

  background: linear-gradient(#3cff3c, #1ea01e);

  box-shadow: 0 0 6px #3cff3c;
}

.building-popup {
  position: fixed;

  left: 50%;
  top: 50%;

  transform: translate(-50%, -50%);

  width: 420px;

  background: url("/images/parchment.png") center/cover no-repeat;

  border: 4px solid #6b4b2a;

  border-radius: 8px;

  box-shadow:
    0 0 40px rgba(0, 0, 0, 0.9),
    inset 0 0 20px rgba(0, 0, 0, 0.6);

  display: none;

  color: #2b1b0f;

  z-index: 1000;
}

.popup-header {
  padding: 12px;

  background: linear-gradient(#6b4b2a, #3c2414);

  border-bottom: 2px solid #8b6a3c;

  display: flex;

  justify-content: space-between;

  font-weight: bold;

  color: #f0d9a6;

  text-shadow: 0 0 4px black;
}

.popup-tabs {
  display: flex;

  border-bottom: 2px solid #8b6a3c;
}

.popup-tabs button {
  flex: 1;

  padding: 10px;

  background: linear-gradient(#5c3b20, #3a2513);

  border: 1px solid #8b6a3c;

  color: #e7d9b4;

  cursor: pointer;

  transition: 0.2s;
}

.popup-tabs button:hover {
  background: linear-gradient(#8b6a3c, #5c3b20);
}

.popup-tabs button.active {
  background: linear-gradient(#d4b97a, #9c7a3a);

  color: #2b1b0f;
}

.popup-content {
  padding: 15px;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

@keyframes popupFade {
  from {
    opacity: 0;
    transform: translate(-50%, -40%);
  }

  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}

.popup-content button {
  background: linear-gradient(#7a5a2a, #caa24b);

  border: 1px solid #e0c67b;

  padding: 8px 14px;

  color: #1a1206;

  font-weight: bold;

  cursor: pointer;

  transition: 0.2s;
}

.popup-content button:hover {
  transform: scale(1.05);

  box-shadow:
    0 0 10px #ffd66b,
    0 0 25px #caa24b;
}

.popup-header span {
  cursor: pointer;
}