body {
    margin: 0;
    overflow: hidden;
    font-family: 'Segoe UI', sans-serif;
}

#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    background: #1a1a2e;
}

.login-container {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-container .card {
    background: rgba(255, 255, 255, 0.95);
    border: none;
    border-radius: 12px;
}

.alert {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    min-width: 300px;
}