* {
    box-sizing: border-box; 
}

body {
    margin: 0;
}

/* --- LAYOUT UTAMA --- */
/* Kita buat wrapper agar judul dan konten sejajar rapi di tengah */
.judul-wrapper, 
.container-cat {
    width: 90%;          /* Lebar default 90% dari layar */
    max-width: 900px;    /* Batas maksimal lebar agar enak dibaca (seperti Medium/LinkedIn) */
    margin-left: auto;   /* Auto kiri-kanan membuat posisi Center */
    margin-right: auto;
}

/* --- JUDUL --- */
.judul-wrapper {
    margin-top: 40px;
    margin-bottom: 20px;
}

#judul_catatan {
    color: var(--dark-blue-color);
    font-size: 36px;     /* Ukuran desktop */
    font-weight: 800;
    text-align: left;
    border-bottom: 5px solid var(--orange-color);
    width: fit-content;
    line-height: 1.2;
    padding-bottom: 10px;
}

/* --- KONTEN CONTAINER --- */
.container-cat {
    margin-bottom: 80px;
}

/* --- GAMBAR UTAMA --- */
.gambar-utama {
    width: 100%;
    height: auto;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0px 4px 15px rgba(0,0,0,0.1); /* Shadow lebih halus */
    margin-bottom: 30px;
}

.gambar-utama img {
    width: 100%;        /* Memenuhi container */
    height: auto;       /* Tinggi menyesuaikan proporsi */
    display: block;     /* Menghilangkan gap putih di bawah gambar */
    object-fit: cover;  
}

/* --- PENULIS --- */
.penulis {
    display: flex;
    flex-direction: column;
    margin-bottom: 30px;
    padding-left: 15px;
    border-left: 4px solid #ddd; /* Aksen garis di samping penulis */
}

.penulis span {
    font-size: 16px;
    color: #333;
}

.penulis strong {
    color: var(--dark-blue-color);
}

.penulis p {
    color: grey;
    font-size: 14px;
    margin: 5px 0 0 0;
}

/* --- DESKRIPSI TEKS --- */
.description {
    margin: 30px 0;
    line-height: 1.6; /* Jarak antar baris agar enak dibaca */
}

.description p, 
.description strong,
.description li {
    color: var(--dark-blue-color);
    font-size: 18px;
    margin-bottom: 15px;
}

/* --- AREA PPT (Responsive Iframe) --- */
.container-ppt {
    margin-top: 40px;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; 
    padding-top: 0;
    height: 0;
    overflow: hidden;
    border-radius: 8px;
    background: #000; /* Background hitam saat loading */
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.video-container iframe,
.video-container object,
.video-container embed {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* =========================================
   RESPONSIVE MOBILE (Layar < 768px)
   ========================================= */
@media screen and (max-width: 768px) {
    
    /* Lebarkan container di HP agar space maksimal */
    .judul-wrapper, 
    .container-cat {
        width: 95%; 
        max-width: 100%;
    }

    /* Kecilkan judul */
    #judul_catatan {
        font-size: 28px; 
        border-bottom-width: 3px;
    }

    /* Sesuaikan margin */
    .judul-wrapper {
        margin-top: 20px;
        margin-bottom: 20px;
    }

    /* Kecilkan font body text */
    .description p, 
    .description strong {
        font-size: 16px;
        text-align: justify; /* Opsional: agar teks rata kiri-kanan di HP */
    }

    /* Penulis */
    .penulis {
        margin-left: 0;
        padding-left: 10px;
    }
}