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

body {
  color: #e0e0e0;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  min-height: 100vh;
  padding: 20px;
  font-family: Segoe UI, Tahoma, Geneva, Verdana, sans-serif;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
}

header {
  text-align: center;
  margin-bottom: 20px;
}

header h1 {
  color: #00d4ff;
  text-shadow: 0 0 20px #00d4ff4d;
  margin-bottom: 10px;
  font-size: 2.5rem;
}

header .info {
  display: flex;
  color: #888;
  justify-content: center;
  gap: 20px;
  font-size: .85rem;
}

header .info span {
  background: #ffffff0d;
  border-radius: 12px;
  padding: 4px 12px;
}

.controls {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.config {
  display: flex;
  background: #ffffff0d;
  border: 1px solid #ffffff1a;
  border-radius: 12px;
  align-items:  center;
  gap: 20px;
  padding: 15px 25px;
}

.config label {
  display: flex;
  align-items:  center;
  gap: 8px;
  font-size: .9rem;
}

.config input {
  color: #fff;
  text-align: center;
  background: #0000004d;
  border: 1px solid #fff3;
  border-radius: 6px;
  width: 60px;
  padding: 6px 10px;
  font-size: .9rem;
}

.config button {
  color: #fff;
  cursor: pointer;
  background: linear-gradient(135deg, #00d4ff, #09c);
  border: none;
  border-radius: 6px;
  padding: 8px 20px;
  transition: all .3s;
  font-size: .9rem;
}

.config button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px #00d4ff66;
}

.simulation {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items:  flex-start;
  gap: 30px;
}

.building {
  background: #ffffff08;
  border: 2px solid #ffffff1a;
  border-radius: 12px;
  min-width: 500px;
  padding: 20px;
}

.floor {
  display: flex;
  position: relative;
  border-bottom: 1px solid #ffffff0d;
  align-items:  center;
  height: 70px;
}

.floor:last-child {
  border-bottom: none;
}

.floor-label {
  text-align: center;
  color: #888;
  width: 50px;
  font-size: 1.1rem;
  font-weight: bold;
}

.floor-buttons {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-right: 20px;
}

.floor-btn {
  color: #888;
  cursor: pointer;
  display: flex;
  background: #0000004d;
  border: 2px solid #fff3;
  border-radius: 50%;
  justify-content: center;
  align-items:  center;
  width: 32px;
  height: 32px;
  transition: all .3s;
  font-size: .7rem;
}

.floor-btn:hover {
  color: #ccc;
  border-color: #fff6;
}

.floor-btn.active {
  color: #fff;
  background: #ff6b35;
  border-color: #ff6b35;
  box-shadow: 0 0 10px #ff6b3580;
}

.floor-btn.up:after {
  content: "▲";
}

.floor-btn.down:after {
  content: "▼";
}

.shafts {
  display: flex;
  position: relative;
  flex: 1;
  gap: 15px;
  height: 100%;
}

.shaft {
  position: relative;
  overflow: hidden;
  background: #0003;
  border-radius: 4px;
  flex: 1;
}

.shaft-label {
  position: absolute;
  color: #ffffff1a;
  pointer-events: none;
  font-size: .7rem;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.elevator {
  position: absolute;
  display: flex;
  border-radius: 4px;
  justify-content: center;
  align-items:  center;
  height: 58px;
  transition: bottom .5s ease-in-out;
  font-size: .85rem;
  font-weight: bold;
  left: 4px;
  right: 4px;
  box-shadow: 0 2px 10px #0000004d;
}

.elevator.idle {
  background: linear-gradient(135deg, #4a4a6a, #3a3a5a);
  border: 2px solid #5a5a7a;
}

.elevator.moving-up {
  background: linear-gradient(135deg, #00c853, #009624);
  border: 2px solid #00e676;
  box-shadow: 0 0 15px #00c85366;
}

.elevator.moving-down {
  background: linear-gradient(135deg, #ff9100, #e65100);
  border: 2px solid #ffab40;
  box-shadow: 0 0 15px #ff910066;
}

.elevator.door-open {
  animation: pulse 1s ease-in-out infinite;
  background: linear-gradient(135deg, #2979ff, #01579b);
  border: 2px solid #448aff;
  box-shadow: 0 0 15px #2979ff66;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }

  50% {
    opacity: .7;
  }
}

.elevator-panels {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.elevator-panel {
  background: #ffffff08;
  border: 2px solid #ffffff1a;
  border-radius: 12px;
  min-width: 200px;
  padding: 15px;
}

.elevator-panel-header {
  display: flex;
  border-bottom: 1px solid #ffffff1a;
  justify-content: space-between;
  align-items:  center;
  margin-bottom: 12px;
  padding-bottom: 10px;
}

.elevator-panel-header h3 {
  color: #00d4ff;
  font-size: 1rem;
}

.elevator-status {
  text-transform: uppercase;
  background: #ffffff1a;
  border-radius: 10px;
  padding: 3px 10px;
  font-size: .75rem;
}

.elevator-status.idle {
  color: #aaa;
}

.elevator-status.moving-up {
  color: #00e676;
}

.elevator-status.moving-down {
  color: #ffab40;
}

.elevator-status.door-open {
  color: #448aff;
}

.elevator-info {
  color: #888;
  margin-bottom: 12px;
  font-size: .8rem;
}

.elevator-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.elevator-btn {
  aspect-ratio: 1;
  color: #ccc;
  cursor: pointer;
  background: #0000004d;
  border: 2px solid #fff3;
  border-radius: 8px;
  width: 100%;
  transition: all .3s;
  font-size: .8rem;
}

.elevator-btn:hover {
  color: #fff;
  border-color: #fff6;
}

.elevator-btn.active {
  color: #1a1a2e;
  background: #00d4ff;
  border-color: #00d4ff;
  box-shadow: 0 0 10px #00d4ff80;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 25px;
  margin-top: 25px;
}

.legend-item {
  display: flex;
  color: #888;
  align-items:  center;
  gap: 8px;
  font-size: .85rem;
}

.legend-color {
  border: 2px solid;
  border-radius: 4px;
  width: 20px;
  height: 20px;
}

.legend-color.idle {
  background: linear-gradient(135deg, #4a4a6a, #3a3a5a);
  border-color: #5a5a7a;
}

.legend-color.moving-up {
  background: linear-gradient(135deg, #00c853, #009624);
  border-color: #00e676;
}

.legend-color.moving-down {
  background: linear-gradient(135deg, #ff9100, #e65100);
  border-color: #ffab40;
}

.legend-color.door-open {
  background: linear-gradient(135deg, #2979ff, #01579b);
  border-color: #448aff;
}

.queue-info {
  color: #666;
  min-height: 18px;
  margin-top: 10px;
  font-size: .75rem;
}

@media (max-width: 900px) {
  .simulation {
    flex-direction: column;
    align-items:  center;
  }

  .building {
    width: 100%;
    min-width: auto;
  }

  .elevator-panels {
    flex-flow: wrap;
    justify-content: center;
  }
}