:root {
    --bg-color: #f0f8ff;
    --text-color: #000;
    --accent-color: #4682b4;
    --container-bg: #ffffff;
    --input-bg: #ffffff;
    --border-color: #ddd;
    --footer-bg: #f8f8f8;
    --budget-bg: #e6f2ff;
}
:root.dark-theme {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --container-bg: #1e1e1e;
    --input-bg: #2a2a2a;
    --border-color: #444;
    --footer-bg: #1e1e1e;
    --budget-bg: #2a2a2a;
}

body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: auto;
    padding: 20px;
    text-align: center;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.container {
    background-color: var(--container-bg);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.input-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: 15px;
}

.input-group input, .input-group select {
    padding: 8px;
    background-color: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: 15px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

th, td {
    border: 1px solid var(--border-color);
    padding: 8px;
}

th {
    background-color: #4682b4;
    color: white;
}

button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 8px 12px;
    margin: 5px;
    cursor: pointer;
    border-radius: 5px;
}

button:hover {
    background-color: #5a9bd3;
}

.budget-container {
    display: flex;
    justify-content: space-between;
    margin: 15px 0;
    background-color: var(--budget-bg);
    padding: 10px;
    border-radius: 5px;
}

.progress-bar {
    height: 20px;
    background-color: #eee;
    border-radius: 10px;
    margin-top: 5px;
    overflow: hidden;
}

.progress {
    height: 100%;
    background-color: var(--accent-color);
    width: 0%;
    transition: width 0.3s;
}

.warning {
    background-color: #ff9800;
}

.danger {
    background-color: #f44336;
}

.edit-mode {
    background-color: #fffde7;
}

@media (max-width: 600px) {
    body {
        padding: 10px;
    }
    
    .input-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .input-group input, .input-group select {
        width: 100%;
        box-sizing: border-box;
    }
    
    table {
        font-size: 14px;
    }
    
    th, td {
        padding: 4px;
    }
    
    .button-group button {
        flex: 1;
        min-width: 120px;
    }
    
    .budget-container {
        flex-direction: column;
    }
}

.sort-options {
    margin: 10px 0;
    padding: 10px;
    background-color: #f0f0f0;
    border-radius: 5px;
}

#editForm {
    background-color: #f9f9f9;
    padding: 15px;
    border-radius: 5px;
    margin: 10px 0;
    display: none;
}

footer {
    background-color: var(--footer-bg) !important;
    color: var(--text-color);
}

.item-completed {
    text-decoration: line-through;
    color: #888;
}

.completed-item {
    background-color: rgba(200, 200, 200, 0.2);
}

.item-checkbox {
    margin-right: 8px;
    cursor: pointer;
    width: 18px;
    height: 18px;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    overflow: auto;
}

.modal-content {
    background-color: var(--container-bg);
    color: var(--text-color);
    margin: 50px auto;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    width: 80%;
    max-width: 500px;
    position: relative;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close {
    position: absolute;
    right: 15px;
    top: 10px;
    color: #aaa;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: var(--accent-color);
}

.settings-group {
    margin: 15px 0;
    text-align: left;
    display: flex;
    flex-direction: column;
}

.settings-group label {
    margin-bottom: 5px;
    font-weight: bold;
}

.settings-group select, 
.settings-group input {
    padding: 8px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-color);
}

.settings-group small {
    margin-top: 5px;
    font-style: italic;
    color: #888;
}

#saveSettings {
    margin-top: 20px;
    width: 100%;
    padding: 10px;
}

.icon-btn {
    background: none;
    border: none;
    font-size: 22px;
    cursor: pointer;
    padding: 5px 10px;
    margin: 0 5px;
    vertical-align: middle;
    transition: transform 0.2s ease;
    border-radius: 50%;
}

.icon-btn:hover {
    background-color: rgba(70, 130, 180, 0.2);
    transform: scale(1.1);
}

/* PDF Export button */
button[onclick="exportToPDF"] {
    background-color: #d9534f;
}

button[onclick="exportToPDF"]:hover {
    background-color: #c9302c;
}

/* WhatsApp share button */
button[onclick="shareToWhatsApp"] {
    background-color: #25d366;
}

button[onclick="shareToWhatsApp"]:hover {
    background-color: #128c7e;
}

/* Install app prompt */
#installPrompt {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--accent-color);
    color: white;
    padding: 10px 15px;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    z-index: 900;
    display: none;
}