/* Top band styles */
.top-band {
  width: 100vw;
  background: linear-gradient(90deg, #174a7c 60%, #3498db 100%);
  padding: 18px 0 14px 0;
  box-shadow: 0 2px 12px 0 rgba(44, 62, 80, 0.10);
  display: flex;
  justify-content: center;
  align-items: center;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
}

.top-title {
  color: #fff;
  font-size: 2.1em;
  font-weight: bold;
  letter-spacing: 1px;
  text-shadow: 0 2px 8px rgba(44, 62, 80, 0.13);
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: linear-gradient(135deg, #e0eafc 0%, #cfdef3 100%);
  padding: 20px;
  min-height: 100vh;
}

h1 {
  text-align: center;
  font-size: 2.5rem;
  color: #0077cc;
  margin-bottom: 30px;
  letter-spacing: 2px;
  text-shadow: 0 2px 8px rgba(0,119,204,0.08);
}

.container {
  max-width: 600px;
  margin: 120px auto 40px auto;
  background: rgba(255,255,255,0.98);
  padding: 32px 28px 28px 28px;
  border-radius: 22px;
  box-shadow: 0 8px 32px 0 rgba(31,38,135,0.18), 0 1.5px 8px 0 rgba(0,0,0,0.08);
  border: 1.5px solid rgba(0,119,204,0.08);
  position: relative;
  transition: box-shadow 0.3s;
  box-sizing: border-box;
}
.container:hover {
  box-shadow: 0 12px 40px 0 rgba(31,38,135,0.22), 0 2px 12px 0 rgba(0,0,0,0.10);
}
label {
  display: block;
  margin-top: 14px;
  font-weight: 600;
  color: #0077cc;
  letter-spacing: 0.5px;
}
input, select {
  width: 100%;
  padding: 10px;
  margin-top: 6px;
  border-radius: 7px;
  border: 1.2px solid #b3c6e0;
  background: #f8fbff;
  font-size: 1rem;
  transition: border 0.2s;
  box-sizing: border-box;
}
input:focus, select:focus {
  border: 1.5px solid #0077cc;
  outline: none;
  background: #f0f7ff;
}
button {
  margin-top: 24px;
  padding: 12px;
  width: 100%;
  border: none;
  border-radius: 7px;
  background: linear-gradient(90deg, #0077cc 60%, #00aaff 100%);
  color: #fff;
  font-size: 1.15rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 8px 0 rgba(0,119,204,0.08);
  transition: background 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
}
button:hover {
  background: linear-gradient(90deg, #005fa3 60%, #0099dd 100%);
  box-shadow: 0 4px 16px 0 rgba(0,119,204,0.13);
}
@media (max-width: 700px) {
  .container {
    max-width: 98vw;
    padding: 18px 6vw 18px 6vw;
    margin: 100px 0 18px 0;
    border-radius: 14px;
  }
  .top-band {
    font-size: 1.3em;
    padding: 16px 0 12px 0;
  }
  h1 {
    font-size: 2rem;
    margin-bottom: 18px;
  }
  label {
    font-size: 1rem;
    margin-top: 10px;
  }
  input, select {
    font-size: 0.98rem;
    padding: 8px;
  }
  button {
    font-size: 1rem;
    padding: 10px;
  }
  .results {
    font-size: 0.98rem;
    padding: 12px 8px;
  }
  canvas {
    padding: 4px;
  }
}
@media (max-width: 480px) {
  .container {
    max-width: 100vw;
    padding: 10px 2vw 10px 2vw;
    margin: 80px 0 8px 0;
    border-radius: 8px;
  }
  .top-band {
    font-size: 1em;
    padding: 12px 0 8px 0;
  }
  h1 {
    font-size: 1.3rem;
    margin-bottom: 10px;
  }
  label {
    font-size: 0.98rem;
    margin-top: 7px;
  }
  input, select {
    font-size: 0.95rem;
    padding: 7px;
  }
  button {
    font-size: 0.95rem;
    padding: 8px;
  }
  .results {
    font-size: 0.95rem;
    padding: 8px 4px;
  }
  canvas {
    padding: 2px;
  }
}
.results {
  margin-top: 24px;
  padding: 18px 16px;
  background: #f0f7ff;
  border-radius: 12px;
  border: 1px solid #cce0f7;
  box-shadow: 0 1px 6px 0 rgba(0,119,204,0.06);
  color: #222;
}
canvas {
  margin-top: 24px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 1px 6px 0 rgba(0,119,204,0.06);
  padding: 8px;
}