body {
    margin: 0;
}

.header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: linear-gradient(120deg, #1f3c88, #3f68c2);
    color: #fff;
    font-family: "Noto Sans KR", sans-serif;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.header-brand {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: #fff;
    text-decoration: none;
}

.header-actions {
    display: flex;
    gap: 10px;
    min-height: 44px;
    align-items: center;
}

.header-button {
    padding: 11px 14px;
    border: none;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.16);
    color: #fff;
    cursor: pointer;
    font-size: 15px;
    min-height: 44px;
    transition: background 0.2s ease, transform 0.1s ease;
}

.header-button:hover {
    background: rgba(255, 255, 255, 0.24);
}

.header-button:active {
    transform: translateY(1px);
}

.header-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

@media (max-width: 720px) {
    .header-bar {
        padding: 12px 20px;
        gap: 10px;
        flex-wrap: wrap;
    }

    .header-brand {
        font-size: 18px;
    }

    .header-actions {
        flex: 1;
        justify-content: flex-end;
        flex-wrap: wrap;
    }

    .header-button {
        padding: 12px 16px;
        font-size: 15px;
        min-width: 96px;
        text-align: center;
    }
}