:root {
    --trisda-black: #0a0a0a;
    --trisda-dark: #121212;
    --gold: #ffc107;
    --gold-glow: rgba(255, 193, 7, 0.3);
}

body {
    background-color: var(--trisda-black) !important;
    color: #fff !important;
    font-family: 'Inter', sans-serif;
}

/* --- HERO SECTION: BACKGROUND IMAGE MODE --- */
.art-hero {
    position: relative;
    min-height: 450px;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
    padding-bottom: 60px;
    background-color: #000;
}

.hero-bg-blur {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: blur(5px) brightness(0.7);
    transform: scale(1.1);
    z-index: 1;
    -webkit-filter: blur(5px) brightness(0.7);
    -webkit-transform: scale(1.1);
    -moz-transform: scale(1.1);
    -ms-transform: scale(1.1);
    -o-transform: scale(1.1);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, var(--trisda-black) 15%, transparent 100%);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
}

.art-title-big {
    font-family: 'Playfair Display', serif;
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.1;
    margin: 15px 0;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.art-badge-top {
    display: inline-block;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 5px;
    font-weight: 800;
    font-size: 0.8rem;
    margin-bottom: 10px;
}

/* --- PREVIEW BOX (FOKUS UTAMA) --- */
.preview-container {
    background: #000;
    border-radius: 20px;
    border: 1px solid rgba(255, 193, 7, 0.2);
    overflow: hidden;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.6);
}

.preview-container iframe {
    width: 100%;
    display: block;
    background: #fff;
}

.pdf-mobile-preview {
    display: none;
}

/* --- ELEGANT SIDEBAR (KARYA TERKAIT) --- */
.sidebar-label {
    color: var(--gold);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.8rem;
    margin-bottom: 20px;
    display: block;
}

.related-card-elegant {
    display: flex;
    align-items: center;
    padding: 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
    text-decoration: none !important;
}

.related-card-elegant:hover {
    background: rgba(255, 193, 7, 0.08);
    border-color: var(--gold);
    transform: translateX(8px);
}

.related-thumb {
    width: 60px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    margin-right: 15px;
}

.related-info h6 {
    color: #fff;
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-info small {
    color: #888;
    font-size: 0.75rem;
}

/* --- BUTTONS --- */
.btn-gold-action {
    background: var(--gold);
    color: #000;
    font-weight: 700;
    border-radius: 50px;
    padding: 12px 30px;
    border: none;
    transition: 0.3s;
    text-transform: uppercase;
    font-size: 0.85rem;
}

.btn-gold-action:hover {
    background: #fff;
    transform: scale(1.05);
}

@media (max-width: 767.98px) {
    .art-hero {
        min-height: 360px;
        padding-bottom: 42px;
    }

    .art-badge-top {
        font-size: 0.68rem;
        letter-spacing: 2.4px;
    }

    .preview-container {
        background: linear-gradient(180deg, rgba(255, 193, 7, 0.08), rgba(255, 255, 255, 0.035));
        border-color: rgba(255, 193, 7, 0.32) !important;
        border-radius: 18px !important;
    }

    .preview-container .pdf-preview-frame {
        display: none;
    }

    .pdf-mobile-preview {
        display: grid;
        gap: 1rem;
        padding: 1rem;
        color: #fff;
    }

    .pdf-mobile-preview__cover {
        overflow: hidden;
        border-radius: 14px;
        border: 1px solid rgba(255, 255, 255, 0.12);
        background: #050505;
        aspect-ratio: 16 / 10;
    }

    .pdf-mobile-preview__cover img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .pdf-mobile-preview__body {
        min-width: 0;
    }

    .pdf-mobile-preview__eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 0.45rem;
        color: var(--gold);
        font-size: 0.78rem;
        font-weight: 800;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        margin-bottom: 0.45rem;
    }

    .pdf-mobile-preview__body h2 {
        color: #fff;
        font-family: 'Playfair Display', serif;
        font-size: 1.5rem;
        line-height: 1.2;
        margin-bottom: 0.35rem;
        overflow-wrap: anywhere;
    }

    .pdf-mobile-preview__body p {
        color: rgba(255, 255, 255, 0.68);
        font-size: 0.88rem;
        line-height: 1.55;
        margin-bottom: 1rem;
    }

    .pdf-mobile-preview__actions {
        display: grid;
        grid-template-columns: 1fr;
        gap: 0.65rem;
    }

    .pdf-mobile-preview__actions .btn {
        width: 100%;
        min-height: 46px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 999px;
        margin: 0;
    }

    .art-title-big {
        font-size: 2.05rem;
        line-height: 1.14;
        overflow-wrap: anywhere;
    }

    .sidebar-label {
        margin-bottom: 14px;
        font-size: 0.72rem;
        letter-spacing: 1.4px;
    }

    .related-info h6 {
        font-size: 0.84rem;
        line-height: 1.3;
    }
}

@media (max-width: 575.98px) {
    .art-title-big {
        font-size: 1.82rem;
    }

    .pdf-mobile-preview__body h2 {
        font-size: 1.28rem;
    }
}