/* Base styles (desktop-first) */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f5f5f5;
  font-size: 18px;
}

#container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

#top-panels {
  display: flex;
  flex: 1;
  padding: 20px;
  gap: 20px;
}

#scenario-panel, #model-panel {
  flex: 1;
  background: white;
  padding: 20px;
  border-radius: 8px;
  overflow-y: auto;
}

#bottom-panel {
  background: #ffffff;
  padding: 20px;
  border-top: 1px solid #ddd;
}

#controls button {
  margin-right: 10px;
  margin-bottom: 10px;
  padding: 12px 20px;
  font-size: 16px;
  border-radius: 6px;
  border: 1px solid #ccc;
  background: #eee;
}

#controls button:hover {
  background: #e0e0e0;
}

#timer {
  margin-top: 10px;
  font-size: 20px;
  font-weight: bold;
}

/* -------------------------------------- */
/* 📱 Mobile layout improvements */
/* -------------------------------------- */

@media (max-width: 700px) {

  body {
    font-size: 17px;
  }

  #container {
    min-height: auto;
  }

  #top-panels {
    flex-direction: column;
    padding: 10px;
    gap: 12px;
  }

  #scenario-panel, #model-panel {
    padding: 15px;
    border-radius: 6px;
  }

  #bottom-panel {
    padding: 15px;
  }

  #controls button {
    width: 100%;
    margin-right: 0;
    font-size: 18px;
    padding: 14px;
  }

  #timer {
    text-align: center;
    margin-top: 15px;
    font-size: 22px;
  }
}

/* -------------------------------------- */
/* 📱 Extra-small screens (older phones) */
/* -------------------------------------- */

@media (max-width: 420px) {

  body {
    font-size: 16px;
  }

  #scenario-panel, #model-panel {
    padding: 12px;
  }

  #controls button {
    font-size: 17px;
    padding: 12px;
  }
}