/* ===== RESET & DASAR ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    padding: 20px;
    line-height: 1.6;
}

/* ===== VARIABEL WARNA ===== */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --danger-color: #f56565;
    --success-color: #48bb78;
    --text-color: #2d3748;
    --border-color: #e2e8f0;
    --bg-white: #ffffff;
}

/* ===== CONTAINER ===== */
.container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 30px;
}

/* ===== FORM ===== */
#todo-form {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

#todo-input,
#date-input {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 14px;
}

#todo-input:focus,
#date-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

button[type="submit"] {
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
}

button[type="submit"]:hover {
    opacity: 0.9;
}

/* ===== TOMBOL FILTER ===== */
.filter-container {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.filter-btn,
#delete-all-btn {
    padding: 10px 20px;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
}

.filter-btn:hover,
#delete-all-btn:hover {
    background: var(--border-color);
}

.filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

#delete-all-btn {
    margin-left: auto;
    border-color: var(--danger-color);
    color: var(--danger-color);
}

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

/* ===== TABEL ===== */
#todo-table {
    width: 100%;
    border-collapse: collapse;
}

#todo-table thead {
    background: var(--primary-color);
    color: white;
}

#todo-table th,
#todo-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

#todo-table tbody tr:hover {
    background: #f7fafc;
}

/* ===== AKSI ===== */
.delete-btn {
    padding: 6px 12px;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

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

.status-badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
}

.status-pending {
    background: #feebc8;
    color: #c05621;
}

.status-completed {
    background: #c6f6d5;
    color: #276749;
}

/* ===== PESAN KOSONG ===== */
#no-task-message {
    text-align: center;
    color: #a0aec0;
    padding: 40px;
    font-size: 18px;
}

/* ===== UTILITIES ===== */
.hidden {
    display: none;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .container {
        padding: 20px;
    }
    
    #todo-form {
        flex-direction: column;
    }
    
    .filter-container {
        flex-wrap: wrap;
    }
    
    #todo-table {
        font-size: 14px;
    }
    
    #todo-table th,
    #todo-table td {
        padding: 8px;
    }
}