body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 40px 0;
    background-color: #f7f9fc;
    color: #333;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1 {
    color: #172a3a;
    text-align: center;
    margin-bottom: 40px;
    font-size: 2.2em;
    font-weight: 800;
    width: 90%;
    max-width: 650px;
    border-bottom: none;
    padding-bottom: 0;
}

h2 {
    color: #00a8e8;
    border-bottom: none;
    padding-bottom: 0;
    margin-top: 40px;
    margin-bottom: 15px;
    font-size: 1.6em;
    font-weight: 700;
}

/* container utama */
.container {
    width: 90%;
    max-width: 650px;
}

.project {
    background-color: transparent;
    padding: 15px 0;
    margin-bottom: 0;
    border: none;
    box-shadow: none;
}

/* input & button */
input[type="text"], input[type="number"] {
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #c0d8e9;
    border-radius: 8px;
    width: 100%;
    box-sizing: border-box;
    font-size: 1em;
}

button {
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    color: white;
    transition: background-color 0.2s, transform 0.1s;
}
button:active {
    transform: translateY(1px);
}

/* kalkulator */
#kalkulator input[type="number"] {
    width: 49%;
    display: inline-block;
    margin-right: 1%;
}

#kalkulator button {
    background-color: #172a3a;
    margin: 5px 2px;
    width: 23%;
}

#kalkulator button:hover {
    background-color: #273e51;
}

#hasil-kalkulator {
    font-size: 1.4em;
    margin-top: 20px;
    font-weight: 700;
    color: #172a3a;
}

/* daftar belanja */
#daftar-belanja input[type="text"] {
    width: calc(75% - 10px);
    display: inline-block;
    margin-right: 5px;
}

#daftar-belanja button.tambah { 
    background-color: #00a8e8;
    width: 23%;
    padding: 12px 10px;
    font-size: 0.9em;
}
#daftar-belanja button.tambah:hover {
    background-color: #008cc0;
}

#daftar-belanja ul {
    list-style: none;
    padding-left: 0;
    margin-top: 20px;
}

#daftar-belanja li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid #e0eaf3;
    font-size: 1.1em;
}

/* Tombol Hapus */
#daftar-belanja li button {
    background-color: #dc3545;
    color: white;
    padding: 6px 14px;
    font-size: 0.85em;
    font-weight: 700;
}
#daftar-belanja li button:hover {
    background-color: #c82333;
}

/* jam digital */
#jam-digital #jam {
    font-family: 'Roboto Mono', monospace;
    font-size: 4.2em;
    margin: 10px 0 5px 0;
    color: #00a8e8;
    text-align: center;
    font-weight: 500;
}

#jam-digital #tanggal {
    font-size: 1.1em;
    color: #6c757d;
    text-align: center;
    margin-bottom: 15px;
}

/* quiz interaktif */
#quiz-interaktif #quiz {
    padding: 20px;
    border: 1px solid #d3e0ea;
    border-radius: 8px;
    margin-bottom: 20px;
    background-color: #ffffff;
}

#quiz-interaktif #quiz h3 {
    color: #172a3a;
    margin-top: 0;
    font-size: 1.3em;
    margin-bottom: 15px;
}

#quiz-interaktif input[type='radio'] {
    width: auto;
    margin-right: 8px;
}

#quiz-interaktif #nextBtn {
    background-color: #172a3a;
    color: white;
    width: 100%;
    font-size: 1.2em;
    padding: 15px;
    font-weight: 700;
}

#quiz-interaktif #nextBtn:hover {
    background-color: #273e51;
}

#quiz-interaktif #hasil-quiz {
    font-size: 1.5em;
    font-weight: 800;
    color: #00a8e8;
    margin-top: 25px;
    text-align: center;
}