:root {
    --primary-blue: #e3f2fd;
    --secondary-blue: #bbdefb;
    --accent-blue: #90caf9;
    --dark-blue: #1976d2;
    --text-color: #333;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
}

.blue-gradient {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    min-height: 100vh;
}

.card {
    border-radius: 10px;
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    margin-bottom: 20px;
}

.card:hover {
    transform: translateY(-5px);
}

.task-card {
    background-color: white;
}

.completed {
    background-color: #e6f9e6;
    /*border-left: 4px solid #54f754;*/
}

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

.task-title {
    font-weight: 600;
    color: var(--dark-blue);
}

.task-description {
    color: #555;
}

.due-date {
    font-size: 0.85rem;
    color: #666;
}

.urgent {
    border-left: 4px solid #ff5252;
}

.overdue {
    background-color: #ffe6e6;
    /*border-left: 4px solid #ff5252;*/
}

.btn-action {
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.btn-add {
    background-color: var(--dark-blue);
    color: white;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    position: fixed;
    bottom: 30px;
    right: 30px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

.btn-add:hover {
    background-color: #1565c0;
}

@media (max-width: 768px) {
    .btn-add {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
    }
}