body {
    background-color: #0f172a;
    font-family: Arial, sans-serif;
    font-size: 15px;
    color: #e2e8f0;
}

/* --- Header / Judul Atas --- */
#header {
    background-color: #1e293b;
    border-bottom: 2px solid #3b82f6;
    color: #ffffff;
    padding: 20px;
    text-align: center;
}

#header h1 {
    font-size: 28px;
    font-family: Verdana, sans-serif;
    color: #60a5fa;
}

#header p {
    font-size: 13px;
    color: #94a3b8;
    margin-top: 5px;
}

/* --- Navigasi Horizontal --- */
#navigasi {
    background-color: #0b1329;
    border-bottom: 1px solid #1e3a8a;
    overflow: visible; /* Agar dropdown menu tidak terpotong */
}

#navigasi a {
    display: inline-block;
    color: #cbd5e1;
    text-decoration: none;
    padding: 12px 20px;
    font-family: Arial, sans-serif;
    font-size: 14px;
    font-weight: bold;
    transition: 0.3s;
}

/* Efek hover navigasi */
#navigasi a:hover {
    background-color: #1d4ed8;
    color: #ffffff;
}

/* Tandai halaman aktif */
#navigasi a.aktif {
    background-color: #2563eb;
    color: #ffffff;
    border-bottom: 3px solid #60a5fa;
}

/* --- Dropdown Navigasi di About Me --- */
.dropdown {
    display: inline-block;
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #0b1329;
    min-width: 170px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.5);
    z-index: 999;
    border: 1px solid #1e3a8a;
    border-top: none;
}

.dropdown-menu a {
    display: block;
    padding: 10px 16px;
    border-bottom: 1px solid #1e293b;
    border-left: none;
    border-right: none;
    white-space: nowrap;
}

.dropdown-menu a:last-child {
    border-bottom: none;
}

/* Tampilkan dropdown saat kursor diarahkan ke tombol */
.dropdown:hover .dropdown-menu {
    display: block;
}

/* --- Wrapper layout 2 kolom --- */
#wrapper {
    width: 900px;
    margin: 0 auto;
    padding: 15px 0;
    overflow: hidden;
}

/* --- Kolom Konten Utama (kiri) --- */
#konten {
    float: left;
    width: 620px;
    padding: 10px 15px;
}

#konten h2 {
    font-family: Verdana, sans-serif;
    font-size: 20px;
    color: #60a5fa;
    border-bottom: 2px solid #2563eb;
    padding-bottom: 6px;
    margin-bottom: 12px;
}

#konten p {
    line-height: 1.7;
    margin-bottom: 12px;
    text-align: justify;
    color: #cbd5e1;
}

/* --- Gambar di halaman index --- */
#gambar-utama {
    border: 3px solid #cadcf9;
    display: block;
    margin: 12px 0;
    width: 300px;
    border-radius: 6px;
}

#gambar-utama:hover {
    opacity: 0.7;
}

/* --- Sidebar (kanan) --- */
#sidebar {
    float: right;
    width: 230px;
    padding: 12px 14px;
    background-color: #1e293b;
    border-left: 3px solid #3b82f6;
    border-radius: 4px;
}

#sidebar h3 {
    font-family: Verdana, sans-serif;
    font-size: 15px;
    color: #93c5fd;
    margin-bottom: 10px;
    border-bottom: 1px solid #334155;
    padding-bottom: 5px;
}

#sidebar ul {
    list-style-type: square;
    padding-left: 18px;
}

#sidebar ul li {
    margin-bottom: 7px;
    font-size: 13px;
    color: #94a3b8;
}

#sidebar ul li a {
    color: #60a5fa;
    text-decoration: none;
}

#sidebar ul li a:hover {
    text-decoration: underline;
    color: #bfdbfe;
}

/* --- Kotak info di sidebar --- */
.kotak-info {
    background-color: #0f172a;
    border: 1px solid #1e40af;
    color: #cbd5e1;
    padding: 10px;
    margin-top: 15px;
    font-size: 13px;
    line-height: 1.6;
    border-radius: 4px;
}

/* --- Tabel sederhana --- */
table {
    border-collapse: collapse;
    width: 100%;
    margin-top: 10px;
    font-size: 14px;
}

table th {
    background-color: #1d4ed8;
    color: #ffffff;
    padding: 8px;
    text-align: left;
}

table td {
    padding: 8px;
    border: 1px solid #334155;
    color: #e2e8f0;
}

table tr:nth-child(even) {
    background-color: #1e293b;
}

table tr:nth-child(odd) {
    background-color: #0f172a;
}

/* --- Footer --- */
.footer {
    background-color: #020617;
    color: #64748b;
    border-top: 1px solid #1e293b;
    text-align: center;
    padding: 14px;
    font-size: 13px;
    clear: both;
    margin-top: 10px;
}

/* --- Switch-Case Jadwal Kuliah --- */
.jadwal-wrapper {
    margin-bottom: 15px;
}

.jadwal-select {
    padding: 8px 12px;
    background-color: #1e293b;
    color: #ffffff;
    border: 1px solid #3b82f6;
    border-radius: 4px;
    font-size: 14px;
}

.jadwal-btn {
    padding: 8px 16px;
    background-color: #2563eb;
    color: #ffffff;
    border: none;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
    margin-left: 8px;
    font-size: 14px;
    transition: 0.3s;
}

.jadwal-btn:hover {
    background-color: #1d4ed8;
}

.jadwal-hasil {
    padding: 14px 18px;
    background-color: #0b1329;
    border-left: 4px solid #3b82f6;
    border-radius: 4px;
    color: #93c5fd;
    font-size: 14px;
    line-height: 1.8;
}