/* styles.css */
*, *:before, *:after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  color: #e2e8f0;
  display: flex;
  background: #0f172a;
  flex-direction: column;
  align-items:  center;
  min-height: 100vh;
  padding: 2rem;
  font-family: Segoe UI, system-ui, -apple-system, BlinkMacSystemFont, Roboto, Noto Sans, Ubuntu, Cantarell, Helvetica Neue, sans-serif;
}

h1 {
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  -webkit-text-fill-color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  margin-bottom: .5rem;
  font-size: 2rem;
  font-weight: 700;
}

#status {
  color: #94a3b8;
  font-variant-numeric: tabular-nums;
  background: #1e293b;
  border-radius: 999px;
  margin-bottom: 1.5rem;
  padding: .5rem 1rem;
  font-size: .875rem;
}

#building {
  display: flex;
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 16px;
  gap: 0;
  width: 100%;
  max-width: 900px;
  padding: 1rem;
  box-shadow: 0 25px 50px -12px #00000080;
}

.elevator-header-row {
  display: flex;
  width: 100%;
  margin-bottom: .25rem;
}

.elevator-header {
  text-align: center;
  color: #64748b;
  border-bottom: 2px solid #334155;
  flex: 1;
  padding: .5rem 0;
  font-size: .875rem;
  font-weight: 600;
}

.floor-row {
  display: flex;
  position: relative;
  border-top: 1px dashed #334155;
  align-items: stretch;
  width: 100%;
  margin-top: .25rem;
}

.floor-row:last-child {
  border-bottom: 1px dashed #334155;
}

.floor-label {
  display: flex;
  color: #64748b;
  flex-shrink: 0;
  justify-content: center;
  align-items:  center;
  width: 48px;
  font-size: .75rem;
  font-weight: 600;
}

.shaft {
  position: relative;
  overflow: hidden;
  background: #0f172a;
  border-radius: 8px;
  flex: 1;
  min-height: 60px;
  margin: 0 2px;
}

.shaft:before {
  content: "";
  position: absolute;
  z-index: 1;
  background: linear-gradient(#334155, #475569, #334155);
  width: 2px;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
}

.elevator-box {
  position: absolute;
  display: flex;
  z-index: 2;
  background: linear-gradient(#3b82f6, #2563eb);
  border: 2px solid #60a5fa;
  border-radius: 8px;
  flex-direction: column;
  justify-content: center;
  align-items:  center;
  gap: 2px;
  height: 70%;
  transition: background .3s, border-color .3s, box-shadow .3s;
  left: 10%;
  right: 10%;
  box-shadow: 0 0 10px #3b82f64d;
}

.elevator-box.idle {
  box-shadow: none;
  background: linear-gradient(#475569, #334155);
  border-color: #64748b;
}

.elevator-box.moving {
  animation: pulse 1s ease-in-out infinite alternate;
  background: linear-gradient(#3b82f6, #2563eb);
  border-color: #60a5fa;
  box-shadow: 0 0 20px #3b82f680;
}

.elevator-box.door-open {
  background: linear-gradient(#f59e0b, #d97706);
  border-color: #fbbf24;
  box-shadow: 0 0 25px #f59e0b80;
}

@keyframes pulse {
  from {
    box-shadow: 0 0 10px #3b82f666;
  }

  to {
    box-shadow: 0 0 25px #3b82f6b3;
  }
}

.dir-indicator {
  color: #fbbf24;
  font-size: .75rem;
  font-weight: 700;
  line-height: 1;
}

.passenger-badge {
  color: #e2e8f0;
  background: #0006;
  border-radius: 999px;
  padding: 1px 5px;
  font-size: .6rem;
  font-weight: 600;
}

.dest-btn {
  color: #94a3b8;
  cursor: pointer;
  display: flex;
  background: #1e293b;
  border: 1px solid #475569;
  border-radius: 3px;
  justify-content: center;
  align-items:  center;
  width: 18px;
  height: 18px;
  padding: 0;
  transition: all .15s;
  font-size: .5rem;
}

.dest-btn:hover {
  color: #e2e8f0;
  background: #334155;
  border-color: #60a5fa;
}

.dest-btn.active {
  color: #fff;
  background: #3b82f6;
  border-color: #60a5fa;
  box-shadow: 0 0 6px #3b82f680;
}

.hall-buttons {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  gap: 2px;
  margin-left: 4px;
}

.hall-btn {
  color: #64748b;
  cursor: pointer;
  display: flex;
  background: #1e293b;
  border: 2px solid #334155;
  border-radius: 8px;
  justify-content: center;
  align-items:  center;
  width: 32px;
  height: 32px;
  padding: 0;
  transition: all .2s;
  font-size: 1rem;
}

.hall-btn:hover {
  color: #e2e8f0;
  background: #334155;
  border-color: #60a5fa;
}

.hall-btn.active {
  color: #fff;
  background: #3b82f6;
  border-color: #3b82f6;
  box-shadow: 0 0 12px #3b82f666;
}

.hall-btn.hall-up {
  border-radius: 8px 8px 2px 2px;
}

.hall-btn.hall-down {
  border-radius: 2px 2px 8px 8px;
}

.info-section {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 12px;
  width: 100%;
  max-width: 900px;
  margin-top: 2rem;
  padding: 1rem 1.5rem;
}

.info-section h2 {
  color: #60a5fa;
  margin-bottom: .75rem;
  font-size: 1rem;
}

.info-section dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .25rem 1rem;
  font-size: .875rem;
}

.info-section dt {
  color: #94a3b8;
  font-weight: 500;
}

.info-section dd {
  color: #e2e8f0;
}

@media (max-width: 640px) {
  body {
    padding: 1rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  .floor-label {
    width: 32px;
    font-size: .65rem;
  }

  .hall-btn {
    width: 24px;
    height: 24px;
    font-size: .75rem;
  }

  .dest-btn {
    width: 14px;
    height: 14px;
    font-size: .45rem;
  }
}