/* --- 테마 13: Liquid Metal --- */
@keyframes liquid-shimmer {
    0% { transform: translateX(-100%) skewX(-20deg); }
    100% { transform: translateX(200%) skewX(-20deg); }
}

.premium-content-wrapper {
    font-family: 'Manrope', 'Pretendard', sans-serif;
    background: #1e1e24;
    color: #e0e0e0;
    line-height: 1.8;
    word-break: keep-all;
    padding: 40px;
    border-radius: 24px 8px 24px 8px;
    margin: 20px 0;
    box-shadow: 0 15px 50px rgba(0,0,0,0.5), inset 0 1px 2px rgba(255,255,255,0.05);
    border: 1px solid #3a3a40;
}

.premium-title {
    font-size: 2.8em;
    font-weight: 800;
    background: linear-gradient(120deg, #e0e0e0 20%, #ffffff 50%, #e0e0e0 80%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    margin-bottom: 40px;
    text-shadow: 0 2px 10px rgba(255,255,255,0.1);
}

.premium-content-wrapper h2 {
    font-size: 2.2em;
    font-weight: 700;
    color: #89b3f9;
    text-align: center;
    padding-bottom: 20px;
    margin: 40px 0 30px 0;
    border-bottom: 1px solid #4a5a7a;
}

.premium-content-wrapper h3 {
    font-size: 1.8em;
    font-weight: 600;
    color: #e0e0e0;
    margin: 35px 0 20px 0;
}

.premium-content-wrapper strong {
    color: #89b3f9;
    font-weight: 600;
}

.info-highlight {
    background: #2a2a32;
    border-left: 4px solid #89b3f9;
    border-radius: 12px;
    padding: 25px;
    margin: 30px 0;
    box-shadow: inset 0 0 15px rgba(0,0,0,0.4);
}

/* --- 버튼 섹션: Liquid Metal --- */
.premium-purchase-section {
    text-align: center;
    margin: 50px auto;
    padding: 40px;
    background: #24242c;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.4);
    border: 1px solid #3a3a40;
}

.purchase-content h3 {
    color: #fff !important;
    font-size: 2em !important;
    font-weight: 700 !important;
    margin-bottom: 15px !important;
    border: none !important;
    padding: 0 !important;
    text-shadow: none !important;
}

.purchase-content p {
    color: #b0b0b0;
    text-align: center;
    margin-bottom: 30px;
}

.premium-purchase-button {
    display: inline-block !important;
    padding: 18px 50px !important;
    font-size: 1.3em !important;
    font-weight: 700 !important;
    color: #fff !important;
    background: linear-gradient(145deg, #2c3e50, #4a6888) !important;
    border: 1px solid #5a7c98 !important;
    border-radius: 50px !important;
    text-decoration: none !important;
    transition: all 0.4s ease !important;
    box-shadow: 0 5px 15px rgba(74, 104, 136, 0.2), inset 0 1px 1px rgba(255,255,255,0.1) !important;
    position: relative !important;
    overflow: hidden !important;
    cursor: pointer !important;
}

.premium-purchase-button::before {
    content: '' !important;
    position: absolute !important;
    top: 0;
    left: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.3) 50%, rgba(255,255,255,0) 100%) !important;
    transform: translateX(-100%) skewX(-20deg) !important;
    transition: none !important;
    display: block !important;
}

.premium-purchase-button:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 25px rgba(74, 104, 136, 0.4), inset 0 1px 1px rgba(255,255,255,0.1) !important;
    text-decoration: none !important;
}

.premium-purchase-button:hover::before {
    animation: liquid-shimmer 1s ease-in-out !important;
}