* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --bg-primary: #03071b;
  --bg-card: #111827;
  --bg-input: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --border-color: #334155;
  --accent-primary: #3b82f6;
  --accent-hover: #2563eb;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 40px 20px;
  font-family: 'Poppins', sans-serif;
}
.container {
  width: 100%;
  max-width: 400px;
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  background-color: var(--bg-card);
}

h1 {
  text-align: center;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 5px;
  color: var(--text-secondary);
}

input,
select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 5px;
  background-color: var(--bg-input);
  color: var(--text-secondary);
  font-size: 1rem;
  transition:
    border-color 0.3s ease,
    box-shadow 0.3s ease,
    transform 0.3s ease;
}
input::placeholder {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.35);
  transform: translateY(-2px);
}

button {
  width: 100%;
  font-size: 1rem;
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  background-color: var(--accent-primary);
  color: var(--text-primary);
  cursor: pointer;
  transition:
    background-color 0.3s ease,
    transform 0.3s ease;
}

button:hover {
  transform: translateY(-3px);
  background-color: var(--accent-hover);
}

#result {
  text-align: center;
  margin-top: 20px;
  padding: 15px;
  min-height: 60px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 1.1rem;
  background-color: var(--bg-input);
}