.referral-page {
    max-width: 960px;
    margin: 0 auto;
    padding: 40px 20px 60px;
    display: flex;
    flex-direction: column;
    gap: 32px;
    color: #f5f5f5;
}

.referral-card {
    background: rgba(18, 21, 31, 0.85);
    border: 1px solid rgba(112, 128, 185, 0.35);
    border-radius: 16px;
    padding: 32px 28px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.referral-card-header h2 {
    margin: 0;
    font-size: 28px;
    letter-spacing: 0.02em;
}

.referral-card-header p {
    margin: 8px 0 0;
    color: #c8ccdf;
    font-size: 16px;
}

.referral-code-box {
    margin-top: 20px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
}

.referral-code {
    font-size: 40px;
    font-weight: 600;
    letter-spacing: 0.25em;
    padding: 12px 24px;
    border-radius: 12px;
    background: rgba(28, 33, 48, 0.95);
    border: 1px solid rgba(101, 128, 199, 0.45);
}

.referral-copy-btn {
    cursor: pointer;
    border: none;
    border-radius: 10px;
    padding: 12px 20px;
    background: linear-gradient(135deg, #6ea2ff, #5273ff);
    color: #0b1020;
    font-weight: 600;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.referral-copy-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 22px rgba(82, 115, 255, 0.35);
}

.referral-copy-btn-success {
    background: linear-gradient(135deg, #4ee4a1, #25c388);
    color: #062414;
}

.referral-tips {
    margin: 24px 0 0;
    padding-left: 20px;
    color: #c8ccdf;
    line-height: 1.6;
}

.referral-list {
    list-style: none;
    margin: 24px 0 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.referral-list-item {
    display: grid;
    gap: 8px;
    background: rgba(29, 34, 49, 0.85);
    border: 1px solid rgba(99, 120, 180, 0.35);
    border-radius: 12px;
    padding: 16px 20px;
}

.referral-name {
    font-size: 20px;
    font-weight: 600;
}

.referral-detail {
    color: #c0c5dc;
    font-size: 15px;
}

.referral-empty {
    margin: 16px 0 0;
    color: #c8ccdf;
    font-style: italic;
}

.referral-guest {
    text-align: center;
    padding: 40px 24px;
    background: rgba(18, 21, 31, 0.75);
    border: 1px solid rgba(112, 128, 185, 0.3);
    border-radius: 16px;
}

.referral-guest h2 {
    margin: 0 0 16px;
    font-size: 30px;
}

.referral-guest p {
    margin: 0;
    color: #c8ccdf;
}

.referral-guest a {
    color: #6ea2ff;
    font-weight: 600;
}

@media (max-width: 640px) {
    .referral-card {
        padding: 24px 20px;
    }

    .referral-code {
        font-size: 28px;
        letter-spacing: 0.18em;
        width: 100%;
        text-align: center;
    }

    .referral-code-box {
        justify-content: center;
    }

    .referral-copy-btn {
        width: 100%;
        text-align: center;
    }

    .referral-list-item {
        padding: 16px;
    }
}