/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

/* Login Styles */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-header h1 {
    color: #4a5568;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.login-header h1 i {
    color: #667eea;
    margin-right: 10px;
}

.login-header p {
    color: #718096;
    margin-bottom: 30px;
}

.login-form {
    text-align: left;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label {
    display: block;
    margin-bottom: 8px;
    color: #4a5568;
    font-weight: 600;
}

.login-form input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.login-form input:focus {
    outline: none;
    border-color: #667eea;
}

.login-form .btn {
    width: 100%;
    margin-top: 10px;
}

.login-footer {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #e2e8f0;
}

.login-footer p {
    color: #718096;
    font-size: 14px;
}

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

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 20px 30px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    color: #4a5568;
    font-size: 2.2rem;
    font-weight: 700;
}

.header h1 i {
    color: #667eea;
    margin-right: 10px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.user-info span {
    color: #666;
    font-weight: 500;
    font-size: 1.1rem;
}

/* Stats Section */
.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.stat-card:nth-child(1) .stat-icon { background: linear-gradient(135deg, #667eea, #764ba2); }
.stat-card:nth-child(2) .stat-icon { background: linear-gradient(135deg, #4ecdc4, #44a08d); }
.stat-card:nth-child(3) .stat-icon { background: linear-gradient(135deg, #ffecd2, #fcb69f); }
.stat-card:nth-child(4) .stat-icon { background: linear-gradient(135deg, #a8edea, #fed6e3); }

.stat-info h3 {
    font-size: 2rem;
    font-weight: 700;
    color: #4a5568;
    margin-bottom: 5px;
}

.stat-info p {
    color: #666;
    font-weight: 500;
}

/* Form Card */
.add-task-section {
    margin-bottom: 30px;
}

.form-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.form-card h2 {
    color: #4a5568;
    margin-bottom: 25px;
    font-size: 1.8rem;
}

.form-card h2 i {
    color: #667eea;
    margin-right: 10px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    color: #4a5568;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    text-decoration: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #f7fafc;
    color: #4a5568;
    border: 2px solid #e2e8f0;
}

.btn-secondary:hover {
    background: #edf2f7;
    border-color: #cbd5e0;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn.active {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

/* Filter Section */
.filter-section {
    margin-bottom: 30px;
}

.filter-controls {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 20px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 15px;
    align-items: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.search-box {
    position: relative;
}

.search-box i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #9ca3af;
}

.search-box input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
}

/* Enhanced Filter Styling */
.filter-controls select {
    position: relative;
}

.filter-controls select:after {
    content: '';
    position: absolute;
    top: 50%;
    right: 15px;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid #6b7280;
    pointer-events: none;
}

/* Filter Select Styling */
.filter-controls select {
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    background: white;
    color: #4a5568;
    font-weight: 500;
    cursor: pointer;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 12px center;
    background-repeat: no-repeat;
    background-size: 16px;
    padding-right: 45px;
}

.filter-controls select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.filter-controls select:hover {
    border-color: #9ca3af;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

/* Style the select options */
.filter-controls select option {
    padding: 10px 15px;
    font-weight: 500;
    color: #4a5568;
}

.filter-controls select option:first-child {
    font-weight: 600;
    color: #667eea;
}

/* Tasks Section */
.tasks-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.tasks-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.tasks-header h2 {
    color: #4a5568;
    font-size: 1.8rem;
}

.tasks-header h2 i {
    color: #667eea;
    margin-right: 10px;
}

.view-toggle {
    display: flex;
    gap: 10px;
}

/* Task Items */
.tasks-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.task-item {
    background: #f8fafc;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
    position: relative;
}

.task-item:hover {
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.task-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}

.task-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 5px;
}

.task-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-bottom: 10px;
}

.task-category,
.task-priority,
.task-status {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
}

.task-category { background: #e6fffa; color: #285e61; }
.task-priority.high { background: #fed7d7; color: #c53030; }
.task-priority.medium { background: #fef5e7; color: #d69e2e; }
.task-priority.low { background: #f0fff4; color: #38a169; }
.task-priority.urgent { background: #fbb6ce; color: #b83280; }

.task-status.completed { background: #c6f6d5; color: #2f855a; }
.task-status.in-progress { background: #bee3f8; color: #2c5282; }
.task-status.pending { background: #fef5e7; color: #d69e2e; }

.task-description {
    color: #4a5568;
    margin-bottom: 15px;
    line-height: 1.5;
}

.task-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.task-time {
    color: #666;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.task-actions {
    display: flex;
    gap: 10px;
}

.task-actions .btn {
    padding: 6px 12px;
    font-size: 0.85rem;
}

.btn-edit {
    background: #edf2f7;
    color: #4a5568;
    border: 1px solid #cbd5e0;
}

.btn-delete {
    background: #fed7d7;
    color: #c53030;
    border: 1px solid #feb2b2;
}

/* Card View */
.tasks-container.card-view {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 15px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    border-bottom: 2px solid #e2e8f0;
}

.modal-header h3 {
    color: #4a5568;
    font-size: 1.5rem;
}

.close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: #666;
    transition: color 0.3s ease;
}

.close-btn:hover {
    color: #333;
}

.modal form {
    padding: 30px;
}

.modal-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    margin-top: 25px;
}

/* Loading Spinner */
.loading-spinner {
    text-align: center;
    padding: 50px;
    color: #666;
}

.loading-spinner i {
    font-size: 3rem;
    margin-bottom: 20px;
    color: #667eea;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #666;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    color: #cbd5e0;
}

.empty-state h3 {
    margin-bottom: 10px;
    font-size: 1.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .stats-section {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .filter-controls {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .tasks-header {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
    
    .task-header {
        flex-direction: column;
        gap: 10px;
    }
    
    .task-footer {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
    
    .task-actions {
        justify-content: center;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
    
    .modal-actions {
        flex-direction: column;
    }
}

/* Success/Error Messages */
.message {
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
}

.message.success {
    background: #c6f6d5;
    color: #2f855a;
    border: 2px solid #9ae6b4;
}

.message.error {
    background: #fed7d7;
    color: #c53030;
    border: 2px solid #feb2b2;
}

.message i {
    font-size: 1.2rem;
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease;
}

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

.slide-up {
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}