* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #061525;
  color: #f1f8ff;
  font-family: Arial, Helvetica, sans-serif;
}

main {
  max-width: 1100px;
  margin: auto;
  padding: 22px 16px;
}

h1 {
  font-size: clamp(25px, 4vw, 36px);
  margin: 0 0 10px;
}

.lead {
  color: #b8d5e5;
  line-height: 1.6;
  max-width: 850px;
}

.panel {
  background: #0d2940;
  border: 1px solid #2c566f;
  border-radius: 17px;
  padding: 18px;
  margin-top: 20px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: end;
  margin-bottom: 18px;
}

.controls label {
  display: flex;
  flex-direction: column;
  gap: 7px;
  color: #c7e0ed;
  font-size: 14px;
}

.controls strong {
  font-size: 14px;
  color: white;
}

select,
input,
button {
  accent-color: #18cbe3;
}

select,
button {
  background: #19445e;
  color: white;
  border: 1px solid #3a7891;
  border-radius: 9px;
  padding: 11px 14px;
  font-size: 15px;
}

button {
  cursor: pointer;
}

button:hover {
  background: #24617e;
}

input {
  width: 200px;
}

/* Animation left, information boxes right */

.simulation-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(200px, 1fr);
  gap: 14px;
  align-items: stretch;
}

.visual-column {
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

canvas {
  width: 100%;
  height: auto;
  display: block;
  background: #061b2c;
  border-radius: 12px;
}

.legend {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 12px 0 0;
  color: #c1d9e5;
  font-size: 12px;
  line-height: 1.5;
}

.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 5px;
}

.cyan {
  background: #32d7f4;
}

.orange {
  background: #f6a64c;
}

/* Information boxes */

.metrics {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.metrics > div {
  background: #123b55;
  padding: 12px;
  border-radius: 10px;
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  gap: 7px;
}

.metrics small {
  color: #bbd5e4;
  font-size: 12px;
}

.metrics strong {
  font-size: 21px;
  color: white;
}

.explanation {
  line-height: 1.8;
  font-size: 16px;
  margin: 22px 0 4px;
  color: #e8f5ff;
}

.explanation strong {
  color: #55e4fa;
}

/* Responsive layout */

@media (max-width: 700px) {
  .simulation-layout {
    grid-template-columns: minmax(0, 1.5fr) minmax(145px, 1fr);
    gap: 8px;
  }

  .metrics > div {
    padding: 8px;
  }

  .metrics strong {
    font-size: 17px;
  }

  .metrics small {
    font-size: 11px;
  }

  .panel {
    padding: 12px;
  }
}

@media (max-width: 440px) {
  .simulation-layout {
    grid-template-columns: 1fr;
  }

  .metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }

  .metrics > div {
    padding: 7px;
  }

  .metrics strong {
    font-size: 14px;
  }

  .metrics small {
    font-size: 10px;
  }

  input {
    width: 100%;
  }
}