/* Container */
.rdns-container {
    max-width: 720px;
    margin: 0 auto;
    padding: 30px 20px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

.rdns-container h2 {
    color: #233D78;
    font-size: 28px;
    font-weight: 700;
    margin-top: 0;
    margin-bottom: 8px;
}

.rdns-description {
    color: #555;
    font-size: 16px;
    margin-bottom: 25px;
}

/* Input Group */
.rdns-input-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

#rdns-ip-input {
    flex: 1;
    min-width: 200px;
    padding: 14px 18px;
    border: 2px solid #e0e5ec;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    background: #f8fafc;
    color: #000000;
}

#rdns-ip-input:focus {
    outline: none;
    border-color: #5B98BA;
    box-shadow: 0 0 0 3px rgba(91, 152, 186, 0.25);
    background: #ffffff;
}

#rdns-ip-input::placeholder {
    color: #9aa3b5;
}

#rdns-lookup-btn {
    padding: 14px 32px;
    background: #233D78;
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.1s ease;
    white-space: nowrap;
}

#rdns-lookup-btn:hover {
    background: #1a2f5e;
}

#rdns-lookup-btn:active {
    transform: scale(0.97);
}

/* Result Area */
.rdns-result-area {
    margin-top: 20px;
    min-height: 60px;
}

.rdns-result-area .rdns-loading {
    color: #5B98BA;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.rdns-result-area .rdns-loading::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #e0e5ec;
    border-top-color: #233D78;
    border-radius: 50%;
    animation: rdns-spin 0.8s linear infinite;
}

@keyframes rdns-spin {
    to { transform: rotate(360deg); }
}

/* Success Result Card */
.rdns-result-success {
    background: #f0f7fa;
    border-left: 5px solid #233D78;
    padding: 18px 22px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.rdns-result-success .rdns-hostname {
    font-size: 18px;
    font-weight: 600;
    color: #000000;
    word-break: break-all;
}

.rdns-result-success .rdns-hostname-label {
    font-size: 14px;
    color: #5B98BA;
    font-weight: 500;
    margin-right: 8px;
}

.rdns-copy-btn {
    background: transparent;
    border: 1px solid #5B98BA;
    color: #233D78;
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.rdns-copy-btn:hover {
    background: #5B98BA;
    color: #ffffff;
}

.rdns-copy-btn.copied {
    background: #28a745;
    border-color: #28a745;
    color: #ffffff;
}

/* Error Result */
.rdns-result-error {
    background: #fff5f5;
    border-left: 5px solid #FF6B6B;
    padding: 16px 22px;
    border-radius: 8px;
    color: #c0392b;
    font-size: 15px;
}

/* Responsive */
@media (max-width: 480px) {
    .rdns-container {
        padding: 20px 16px;
    }
    .rdns-container h2 {
        font-size: 24px;
    }
    #rdns-lookup-btn {
        width: 100%;
        justify-content: center;
    }
    .rdns-result-success {
        flex-direction: column;
        align-items: flex-start;
    }
    .rdns-copy-btn {
        align-self: stretch;
        justify-content: center;
    }
}