.rtb-container {
    max-width: 1000px;
    margin: 20px auto;
    background: #0f172a;
    color: #f8fafc;
    border-radius: 16px;
    padding: 24px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
.rtb-alert-timer {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.4);
    padding: 12px 18px;
    border-radius: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: #fcd34d;
    margin-bottom: 20px;
}
.rtb-btn-submit {
    background: linear-gradient(to right, #f59e0b, #d97706);
    color: #020617;
    font-weight: 700;
    padding: 12px 28px;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    width: 100%;
    margin-top: 20px;
}
.rtb-btn-submit:hover {
    background: #fbbf24;
}