* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background: linear-gradient(135deg, rgb(240, 253, 251) 0%, rgb(33, 249, 216, 0.2) 100%);
    color: #2c3e50;
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px;
    background: linear-gradient(135deg, #fff 0%, rgb(33, 249, 216, 0.1) 100%);
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(33, 249, 216, 0.1);
}

header h1 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 2.5em;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
}

header p {
    color: #666;
    font-size: 1.1em;
}

.task-form, .task-filters, .tasks-container {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 25px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}

.task-form:hover, .task-filters:hover, .tasks-container:hover {
    transform: translateY(-5px);
}

form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

input, textarea, select {
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

input:focus, textarea:focus, select:focus {
    border-color: rgb(33, 249, 216);
    outline: none;
    box-shadow: 0 0 0 3px rgba(33, 249, 216, 0.2);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

button {
    padding: 15px 25px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, rgb(33, 249, 216) 0%, rgb(28, 211, 183) 100%);
    color: #2c3e50;
    text-transform: uppercase;
    letter-spacing: 1px;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(33, 249, 216, 0.4);
    background: linear-gradient(135deg, rgb(28, 211, 183) 0%, rgb(33, 249, 216) 100%);
}

.task-filters {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.task-filters select {
    flex: 1;
    min-width: 200px;
}

#tasksList {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    padding: 10px;
}

.task-item {
    border: none;
    padding: 20px;
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.task-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.task-item h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.2em;
    font-weight: 600;
}

.task-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 15px;
    font-size: 0.9em;
    color: #666;
}

.task-meta span {
    background: #f8f9fa;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 0.85em;
}

.priority-high {
    border-left: 4px solid rgb(255, 107, 107);
}

.priority-medium {
    border-left: 4px solid rgb(33, 249, 216);
}

.priority-low {
    border-left: 4px solid rgb(109, 213, 237);
}

.category-professional {
    background: linear-gradient(135deg, rgb(33, 249, 216, 0.1) 0%, rgb(240, 253, 251) 100%);
}

.category-personal {
    background: linear-gradient(135deg, rgb(33, 249, 216, 0.2) 0%, rgb(240, 253, 251) 100%);
}

.notification-btn {
    background: linear-gradient(135deg, rgb(33, 249, 216) 0%, rgb(28, 211, 183) 100%);
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
}

.notification-btn:hover {
    background: linear-gradient(135deg, rgb(28, 211, 183) 0%, rgb(33, 249, 216) 100%);
}

.alert {
    padding: 15px;
    margin: 15px 0;
    border-radius: 8px;
    font-weight: 500;
    animation: slideIn 0.3s ease;
}

.alert-success {
    background: linear-gradient(135deg, rgb(33, 249, 216, 0.2) 0%, rgb(28, 211, 183, 0.2) 100%);
    color: rgb(21, 87, 36);
}

.alert-danger {
    background: linear-gradient(135deg, #f8d7da 0%, #f5c6cb 100%);
    color: #721c24;
}

.delete-btn {
    background: linear-gradient(135deg, rgb(255, 107, 107) 0%, rgb(238, 82, 83) 100%);
    margin-right: 10px;
    color: white;
}

.complete-btn {
    background: linear-gradient(135deg, rgb(33, 249, 216) 0%, rgb(28, 211, 183) 100%);
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .task-filters {
        flex-direction: column;
    }
    
    input, textarea, select, button {
        padding: 12px;
    }
    
    #tasksList {
        grid-template-columns: 1fr;
    }
}

/* Add custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: rgb(33, 249, 216);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgb(28, 211, 183);
}