/* Base Reset */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(145deg, #1f2937, #111827);
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: #f9fafb;
}

/* Main Box */
.box {
    backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.box h2 {
    font-size: 22px;
    margin-bottom: 25px;
    color: #f3f4f6;
}

/* Inputs */
input[type="number"],
input[type="text"] {
    width: 100%;
    padding: 14px;
    margin: 12px 0;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    background-color: #f3f4f6;
    color: #1f2937;
    outline: none;
    transition: background 0.2s ease;
}

input[type="text"]:read-only {
    background-color: #e5e7eb;
    color: #4b5563;
}

/* Buttons */
button {
    padding: 12px 20px;
    margin: 15px 6px 0;
    border: none;
    border-radius: 8px;
    background-color: #3b82f6;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s ease;
}

button:hover {
    background-color: #2563eb;
    transform: translateY(-2px);
}

/* Signature */
h1 {
    margin-top: 30px;
    font-size: 14px;
    color: #9ca3af;
    letter-spacing: 1px;
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.3);
}

/* Responsive */
@media (max-width: 500px) {
    .box {
        padding: 30px 20px;
    }

    button {
        width: 100%;
        margin: 12px 0 0;
    }
}