.alert-box {
    position: fixed;
    top: 18px;
    left: 50%;
    transform: translateX(-50%);
    min-width: 280px;
    max-width: 520px;
    padding: 14px 26px;
    border-radius: 999px;
    font-size: 14px;
    font-family: "Poppins", sans-serif;
    font-weight: 500;
    color: #fff;
    text-align: center;
    display: none;
    z-index: 9999;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(14px);
    transition: opacity 0.35s ease, transform 0.35s ease;
}

.alert-success {
    /* Match ExamEase blue/green gradient */
    background: linear-gradient(135deg, #174bbd 0%, #1e5cd4 50%, #4ed442 100%) !important;
}

.alert-error {
    /* Softer error using same color family */
    background: linear-gradient(135deg, #4e1b1b 0%, #b03030 40%, #ff5c5c 100%) !important;
}