* {
    box-sizing: border-box;
}

body {
    margin: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a, #2b0f1f);
    font-family: 'Segoe UI', sans-serif;
    color: #fff;
}

.container {
    background: #0b1220;
    width: 900px;
    max-height: 95vh;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.6);
}

h2 {
    text-align: center;
    margin: 0 0 10px;
    color: #c1121f;
}

.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

label {
    font-size: 14px;
    margin-top: 8px;
    display: block;
}

input {
    width: 100%;
    padding: 8px;
    margin-bottom: 8px;
    border-radius: 6px;
    border: none;
    background: #1e293b;
    color: white;
}

.pregunta {
    font-size: 13px;
    margin: 8px 0 4px;
}

.opciones {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.opcion {
    flex: 1;
    background: #111827;
    padding: 6px;
    border-radius: 6px;
    text-align: center;
    font-size: 13px;
    border: 1px solid #334155;
}

button {
    width: 100%;
    padding: 10px;
    background: linear-gradient(135deg, #c1121f, #003049);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
}

button:hover {
    opacity: 0.9;
}

.resultado {
    background: #020617;
    padding: 15px;
    border-radius: 10px;
    font-size: 14px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.resultado p {
    margin: 4px 0;
}

.resultado h3 {
    margin: 0 0 6px;
    color: #e63946;
}

.neto {
    margin-top: 6px;
    font-size: 16px;
    color: #38bdf8;
}

.hint {
    opacity: 0.6;
    text-align: center;
}