/* --- Gaya Umum & Mobile First --- */
:root {
    --primary-color: #4CAF50;
    --primary-dark: #388E3C;
    --secondary-color: #f0f0f0;
    --text-color: #333;
    --border-color: #ddd;
    --error-color: #e74c3c;
    --font-family: 'Poppins', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: #f9f9f9;
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background-color: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

header {
    text-align: center;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 20px;
}

header h1 {
    /* color: var(--primary-color); */
    color: #800080;
    margin-bottom: 10px;
}

header p {
    color: #666;
    font-size: 0.95em;
}

/* --- Form Elements --- */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #555;
}

input[type="text"],
input[type="number"],
input[type="tel"],
input[type="date"],
input[type="time"],
select,
textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    /* Mencegah zoom pada iOS */
    transition: border-color 0.3s, box-shadow 0.3s;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 5px rgba(76, 175, 80, 0.3);
}

textarea {
    resize: vertical;
}

/* --- Rincian Biaya --- */
.rincian-biaya {
    background-color: var(--secondary-color);
    padding: 15px 20px;
    border-radius: 8px;
    margin: 25px 0;
}

.biaya-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 0.95em;
}

.biaya-item:last-child {
    margin-bottom: 0;
}

.biaya-item.total {
    font-weight: 700;
    font-size: 1.1em;
    color: var(--primary-dark);
}

hr {
    border: 0;
    height: 1px;
    background-color: #ccc;
    margin: 15px 0;
}

.divider {
    border: 0;
    height: 2px;
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0), var(--border-color), rgba(0, 0, 0, 0));
    margin: 30px 0;
}

/* --- Button --- */
.btn-submit {
    display: block;
    width: 100%;
    padding: 15px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
    margin-top: 10px;
}

.btn-submit:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-submit:active {
    transform: translateY(0);
}

/* --- Responsif untuk Desktop --- */
@media (min-width: 768px) {
    body {
        padding: 40px;
    }

    .container {
        padding: 40px;
    }
}