:root {
    --bg-color: #1a1a2e; /* Background gelap utama */
    --card-color: #2c2c44; /* Warna card/container */
    --text-color: #e0e0f0; /* Warna teks terang */
    --input-bg: #1f1f3a; /* Warna latar belakang input */
    --btn-primary: #5267ff; /* Warna tombol aksi utama */
    --btn-secondary: #ff5252; /* Warna tombol hapus/delete */
    --border-color: #444466; /* Warna border halus */
    --font-family: sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
}

.todo-container {
    background-color: var(--card-color);
    border-radius: 12px;
    padding: 30px;
    width: 100%;
    max-width: 700px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.8em;
    letter-spacing: 2px;
}

/* Input Group Styling */
.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

#task-input, #date-input {
    flex-grow: 1;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-size: 1em;
}

#date-input {
    max-width: 120px; /* Lebar untuk input tanggal */
    text-align: center;
}

#task-input::placeholder, #date-input::placeholder {
    color: #9999cc;
}

#add-task-btn {
    background-color: var(--btn-primary);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 10px 15px;
    font-size: 1.5em;
    cursor: pointer;
    line-height: 1;
    transition: background-color 0.2s;
}

#add-task-btn:hover {
    background-color: #4359e6;
}

/* Controls Styling */
.controls {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.control-btn {
    padding: 10px 15px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    text-transform: uppercase;
    transition: opacity 0.2s;
}

.control-btn:hover {
    opacity: 0.8;
}

#filter-btn {
    background-color: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

#delete-all-btn {
    background-color: var(--btn-secondary);
    color: white;
}

/* Task List Styling */
.task-list-header, .task-item {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr; /* 4 kolom: Task, Date, Status, Actions */
    gap: 10px;
    padding: 10px 0;
    text-transform: uppercase;
    font-size: 0.9em;
    align-items: center;
}

.task-list-header {
    border-bottom: 1px solid var(--border-color);
    font-weight: bold;
    color: #aaaacc;
    margin-bottom: 10px;
}

#no-task-message {
    text-align: center;
    color: #9999cc;
    font-style: italic;
    padding: 20px;
}

.task-item {
    background-color: var(--input-bg);
    border-radius: 6px;
    padding: 15px 10px;
    margin-bottom: 8px;
    font-size: 1em;
    transition: background-color 0.2s;
}

.task-item.completed {
    text-decoration: line-through;
    opacity: 0.6;
}

.task-text {
    word-break: break-word; /* Memastikan teks panjang pecah */
}

.task-date {
    text-align: center;
}

/* Action Buttons in Task Item */
.actions-group {
    display: flex;
    gap: 5px;
    justify-content: center;
}

.action-btn {
    padding: 5px 8px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8em;
    color: white;
}

.complete-btn {
    background-color: #4caf50; /* Hijau */
}

.delete-btn {
    background-color: var(--btn-secondary); /* Merah */
}

@media (max-width: 600px) {
    .task-list-header, .task-item {
        grid-template-columns: 3fr 1fr 1fr; /* Sembunyikan 'Due Date' atau buat lebih ringkas */
    }
    .task-date {
        display: none; /* Sembunyikan tanggal di layar kecil */
    }
    .input-group {
        flex-direction: column;
    }
    #date-input {
        max-width: 100%;
    }
}