body {
    margin: 0;
    background: radial-gradient(circle at center, #1c1f26 0%, #0d0f14 100%);
    font-family: 'Segoe UI', sans-serif;
    color: #fff;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.vault-container {
    width: 100%;
    display: flex;
    justify-content: center;
}

.vault-box {
    background: rgba(20, 23, 30, 0.95);
    padding: 50px;
    border-radius: 12px;
    width: 360px;
    box-shadow: 0 0 40px rgba(0, 200, 255, 0.2);
    text-align: center;
}

.vault-box h1 {
    margin: 0;
    font-weight: 600;
    letter-spacing: 2px;
}

.subtitle {
    color: #8aa0b5;
    font-size: 14px;
    margin-bottom: 30px;
}

input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 6px;
    border: none;
    background: #11141a;
    color: #fff;
    outline: none;
    transition: 0.3s;
}

input:focus {
    box-shadow: 0 0 10px rgba(0, 200, 255, 0.4);
}

button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 6px;
    background: linear-gradient(90deg, #00c6ff, #0072ff);
    color: white;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    opacity: 0.9;
}

.footer {
    margin-top: 25px;
    font-size: 12px;
    color: #5c6a7a;
}