* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: radial-gradient(circle at top, #f5f7ff 0%, #eef2f7 35%, #e7edf5 100%);
  color: #333;
}

.install-container {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 1rem;
}

.install-card {
  background-color: #ffffff;
  border-radius: 0.75rem;
  border: 1px solid rgba(90, 111, 155, 0.12);
  box-shadow: 0 10px 30px rgba(20, 35, 90, 0.08);
  width: 100%;
  max-width: 540px;
  padding: 2rem;
}

.install-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  text-align: center;
  color: #2c3e50;
}

.install-list {
  margin-top: 0.5rem;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  line-height: 1.5;
}

.install-list li {
  margin-bottom: 0.35rem;
}

.error-box {
  background-color: #fdecea;
  border: 1px solid #f5c6cb;
  color: #a94442;
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.success-box {
  background-color: #e8f8f0;
  border: 1px solid #b7ebc6;
  color: #1e7e34;
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.warning-box {
  background-color: #fff4e5;
  border: 1px solid #ffd8a8;
  color: #8a6d3b;
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.35rem;
  color: #34495e;
}

.form-group label input[type="checkbox"] {
  margin-right: 0.5rem;
  transform: translateY(1px);
}

.form-group input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-size: 1rem;
  border: 1px solid #ced4da;
  border-radius: 0.375rem;
  transition: border-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
  background-color: #fafbfc;
  color: #2d3436;
}

.form-group input:focus {
  border-color: #5dade2;
  outline: none;
  box-shadow: 0 0 0 0.2rem rgba(93, 173, 226, 0.25);
}

.input-error {
  border-color: #e74c3c !important;
  background-color: #fdecea;
}

.error-text {
  margin-top: 0.25rem;
  font-size: 0.875rem;
  color: #e74c3c;
}

.btn-submit {
  width: 100%;
  background-color: #2e86de;
  color: #ffffff;
  font-size: 1rem;
  font-weight: 500;
  border: none;
  border-radius: 0.375rem;
  padding: 0.65rem 0;
  cursor: pointer;
  transition: background-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.btn-submit:hover {
  background-color: #1b4f72;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

.btn-submit:active {
  background-color: #154360;
}

.btn-submit:focus {
  outline: none;
}

.install-note {
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: #7f8c8d;
  text-align: center;
}

.install-instructions {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: #555;
  text-align: center;
}

code {
  display: inline-block;
  padding: 0.1rem 0.35rem;
  border-radius: 0.35rem;
  background-color: #f3f5f8;
  color: #2c3e50;
  font-size: 0.85rem;
}

@media (max-width: 480px) {
  .install-card {
    padding: 1.5rem;
  }
  .install-title {
    font-size: 1.3rem;
    margin-bottom: 1.25rem;
  }
}