:root {
    --primary-color: #2e8b57;
    --background-color: #f0f4f7;
    --card-background: #ffffff;
    --text-color: #333333;
    --heading-color: #222222;
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.05);
    --soft-text-color: #666666; /* Warna teks yang lebih soft */
}

/* Dark Mode */
.dark-mode {
    --primary-color: #3cb371;
    --background-color: #1a1a1a;
    --card-background: #2b2b2b;
    --text-color: #f0f0f0;
    --heading-color: #ffffff;
    --border-color: #444444;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --soft-text-color: #cccccc; /* Warna teks yang lebih soft untuk dark mode */
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}

.container {
    background-color: var(--card-background);
    width: 90%;
    max-width: 700px;
    margin: 20px auto;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px var(--shadow-color);
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
}

h1 {
    color: var(--primary-color);
    font-size: 2rem;
    font-weight: 600;
}

h2 {
    color: var(--heading-color);
    /* Hapus atau komentari baris di bawah ini untuk menghilangkan garis */
    /* border-bottom: 2px solid var(--primary-color); */
    padding-bottom: 0.2rem;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}
h3 {
    color: var(--heading-color);
    font-size: 1.2rem;
    margin-top: 0;
    margin-bottom: 0.8rem;
}

.theme-toggle-btn {
    position: absolute;
    top: -10px;
    right: 0;
    background-color: var(--card-background);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle-btn:hover {
    background-color: var(--border-color);
}

.form-section {
    margin-bottom: 2rem;
}

.input-group {
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background-color: var(--card-background);
    transition: border-color 0.3s ease;
}

.input-group:focus-within {
    border-color: var(--primary-color);
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--heading-color);
}

input[type="text"] {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background-color: var(--card-background);
    color: var(--text-color);
    transition: border-color 0.3s ease;
    box-sizing: border-box;
}

input[type="text"]::placeholder {
    color: #a0a0a0;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

.help-text {
    font-size: 0.85rem;
    color: #888888;
    margin-top: 0.5rem;
    margin-bottom: 0;
}

.result-section {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.result-box {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1rem;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.result-box p {
    margin: 0;
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-color);
}

.total-hpp {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-top: 0.5rem;
}

.generate-pdf-btn {
    background-color: var(--primary-color);
    color: #ffffff;
    border: none;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.generate-pdf-btn:hover {
    background-color: #277947;
    transform: translateY(-2px);
}

.hotel-section {
    display: flex;
    flex-direction: column;
}

.input-row {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 600px) {
    .input-row.room-options {
        flex-direction: row;
        gap: 20px;
    }
    
    .room-option {
        width: 100%;
    }

    .room-option label {
        text-align: center;
    }
}

/* Styling untuk pilihan margin */
.margin-options {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
}

.margin-options label {
    display: flex;
    align-items: center;
    gap: 5px;
}

.with-unit {
    position: relative;
    display: flex;
    align-items: center;
}

.with-unit input {
    padding-right: 40px;
}

.input-unit {
    position: absolute;
    right: 15px;
    color: var(--text-color);
    font-size: 1em;
    font-weight: 600;
}

/* --- Perbaikan Footer --- */
.footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--soft-text-color);
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.footer a:hover {
    text-decoration: underline;
}

/* --- Tambahan untuk Hotel Plus --- */
.hidden {
    display: none;
}

.hotel-plus-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 1rem;
    cursor: pointer;
    user-select: none;
}

.hotel-plus-toggle input {
    width: 20px;
    height: 20px;
}

.hotel-plus-toggle label {
    margin: 0;
}
/* --- Styling Logo --- */
.logo {
    max-width: 75px; /* Lebar maksimal logo */
    height: auto; /* Tinggi otomatis agar proporsi tetap terjaga */
    margin-bottom: 0px; /* Jarak antara logo dan judul */
}

/* Sesuaikan tampilan di dark mode jika diperlukan */
.dark-mode .logo {
    filter: invert(1); /* Efek untuk logo berwarna gelap agar terlihat di dark mode */
}
/* --- Styling Sub-Header --- */
.sub-header {
    font-size: 1rem; /* Ukuran yang lebih kecil dari h1 */
    font-weight: 400;
    color: var(--soft-text-color);
    margin-top: -15px; /* Kurangi jarak ke atas */
    margin-bottom: 0px;
}