* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #1f2937;
    background-color: #f3f4f6;
}

header {
    padding: 32px 20px;
    color: white;
    text-align: center;
    background-color: #2563eb;
}

header h1 {
    margin-top: 0;
}

nav a {
    margin: 0 8px;
    color: white;
    text-decoration: none;
}

nav a:hover {
    text-decoration: underline;
}

#tombol-tema {
    margin-top: 20px;
    padding: 10px 16px;
    color: #2563eb;
    font-weight: bold;
    cursor: pointer;
    background-color: white;
    border: none;
    border-radius: 6px;
}

main {
    width: min(900px, 90%);
    margin: 32px auto;
}

section {
    margin-bottom: 24px;
    padding: 24px;
    background-color: white;
    border-radius: 8px;
}

h2 {
    color: #2563eb;
}

form {
    display: grid;
    gap: 10px;
}

label {
    font-weight: bold;
}

input,
textarea {
    width: 100%;
    padding: 10px;
    font: inherit;
    border: 1px solid #9ca3af;
    border-radius: 6px;
}

textarea {
    resize: vertical;
}

form button {
    width: fit-content;
    padding: 10px 18px;
    color: white;
    font-weight: bold;
    cursor: pointer;
    background-color: #2563eb;
    border: none;
    border-radius: 6px;
}

#status-form {
    font-weight: bold;
    color: #15803d;
}

.input-tugas {
    display: flex;
    gap: 10px;
}

.input-tugas input {
    flex: 1;
}

#daftar-tugas {
    padding: 0;
    list-style: none;
}

#daftar-tugas li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 10px;
    padding: 12px;
    background-color: #e5e7eb;
    border-radius: 6px;
}

#daftar-tugas button {
    padding: 6px 10px;
    color: white;
    cursor: pointer;
    background-color: #dc2626;
    border: none;
    border-radius: 4px;
}

footer {
    padding: 16px;
    color: white;
    text-align: center;
    background-color: #1f2937;
}

footer p {
    margin: 0;
}

body.mode-gelap {
    color: #e5e7eb;
    background-color: #111827;
}

body.mode-gelap section {
    background-color: #1f2937;
}

body.mode-gelap h2 {
    color: #93c5fd;
}

body.mode-gelap input,
body.mode-gelap textarea {
    color: #e5e7eb;
    background-color: #374151;
    border-color: #6b7280;
}

body.mode-gelap #status-form {
    color: #86efac;
}

body.mode-gelap #daftar-tugas li {
    background-color: #374151;
}

@media (max-width: 500px) {
    .input-tugas {
        align-items: stretch;
        flex-direction: column;
    }
}