body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: linear-gradient(135deg, #e0e7ff, #f7f7fb);
    color: #333;
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    max-width: 700px;
    width: 100%;
    padding: 20px;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    font-size: 2rem;
    color: #2f3d9e;
    animation: fadeInDown 0.8s ease;
}

.card {
    background: #fff;
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, .1);
    animation: fadeInUp 0.8s ease;
}

.form-group {
    margin-bottom: 15px;
}

label {
    font-weight: 600;
    margin-bottom: 5px;
    display: block;
}

input,
select,
button {
    padding: 12px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 8px;
    width: 100%;
    transition: all 0.3s ease;
}

input:focus,
select:focus {
    border-color: #2f6fed;
    box-shadow: 0 0 6px rgba(47, 111, 237, 0.4);
    outline: none;
}

button {
    background: #2f6fed;
    color: #fff;
    border: none;
    font-weight: bold;
    cursor: pointer;
    border-radius: 10px;
    transition: transform 0.2s ease, background 0.3s ease;
}

button:hover {
    background: #234ecc;
    transform: scale(1.05);
}

.btn {
    display: inline-block;
    background: #2f6fed;
    color: #fff;
    padding: 8px 14px;
    border-radius: 8px;
    text-decoration: none;
    transition: background 0.3s ease;
}

.btn:hover {
    background: #234ecc;
}

details {
    margin-top: 15px;
    padding: 10px;
    background: #f5f7ff;
    border-radius: 10px;
    cursor: pointer;
}

details summary {
    font-weight: 600;
    cursor: pointer;
    outline: none;
}

.advanced {
    margin-top: 10px;
}

small {
    display: block;
    color: #666;
    margin-top: 4px;
}

/* Animations */
@keyframes fadeInUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes fadeInDown {
    from { transform: translateY(-20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}