/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4CAF50;
    --secondary-color: #2196F3;
    --danger-color: #f44336;
    --warning-color: #ff9800;
    --success-color: #4CAF50;
    --dark-color: #333;
    --light-color: #f5f5f5;
    --border-radius: 8px;
    --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #fafafa;
    color: var(--dark-color);
    line-height: 1.6;
}

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

/* Authentication Pages */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.auth-card {
    background: white;
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    width: 100%;
    max-width: 400px;
}

.auth-card h1 {
    font-size: 28px;
    margin-bottom: 10px;
    text-align: center;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
    font-size: 14px;
}

/* Forms */
.form {
    margin-bottom: 20px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark-color);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: #45a049;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #0b7dda;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #45a049;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #da190b;
}

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Messages */
.message {
    margin-top: 20px;
    padding: 15px;
    border-radius: 6px;
    text-align: center;
    display: none;
}

.message:not(:empty) {
    display: block;
}

.message-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.message-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-footer {
    text-align: center;
    font-size: 14px;
    color: #666;
    margin-top: 20px;
}

.form-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

/* Navbar */
.navbar {
    background-color: var(--primary-color);
    color: white;
    padding: 15px 0;
    box-shadow: var(--box-shadow);
}

.navbar-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-title {
    font-size: 24px;
}

.navbar-user {
    display: flex;
    gap: 15px;
    align-items: center;
}

/* Dashboard */
.dashboard {
    max-width: 1200px;
    margin: 30px auto;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.dashboard-header h2 {
    font-size: 28px;
}

/* Tasks Container */
.tasks-container {
    margin-top: 30px;
}

.tasks-list {
    display: grid;
    gap: 20px;
}

.task-item {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border-left: 5px solid var(--secondary-color);
    transition: all 0.3s;
}

.task-item:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.task-item.completed {
    opacity: 0.6;
    background-color: #f0f0f0;
}

.task-item.completed .task-header h3 {
    text-decoration: line-through;
    color: #999;
}

.task-item.urgency-critical {
    border-left-color: var(--danger-color);
    background-color: #fff5f5;
}

.task-item.urgency-high {
    border-left-color: var(--warning-color);
    background-color: #fff9f0;
}

.task-item.urgency-medium {
    border-left-color: var(--secondary-color);
}

.task-item.urgency-low {
    border-left-color: #4CAF50;
}

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

.task-header h3 {
    font-size: 18px;
    flex: 1;
}

.priority-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.priority-badge.low {
    background-color: #d4edda;
    color: #155724;
}

.priority-badge.medium {
    background-color: #fff3cd;
    color: #856404;
}

.priority-badge.high {
    background-color: #f8d7da;
    color: #721c24;
}

.task-due-date,
.task-reminder {
    color: #666;
    font-size: 14px;
    margin: 5px 0;
}

.task-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.task-actions .btn {
    flex: 1;
    text-align: center;
    padding: 10px;
    font-size: 13px;
}

.empty-state {
    text-align: center;
    padding: 40px;
    color: #999;
    font-size: 16px;
}

.loading {
    text-align: center;
    padding: 40px;
    color: #666;
}

/* Modals and Popups */
.modal,
.popup {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.hidden,
.popup.hidden {
    display: none;
}

.modal-content,
.popup-content {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    max-width: 500px;
    width: 90%;
    position: relative;
    box-shadow: 0 5px 40px rgba(0, 0, 0, 0.3);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-close,
.popup-close {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: #999;
    border: none;
    background: none;
}

.modal-close:hover,
.popup-close:hover {
    color: var(--dark-color);
}

.modal-content h3,
.popup-content h3 {
    margin-bottom: 20px;
    font-size: 22px;
}

.popup-content p {
    margin-bottom: 20px;
    color: #666;
}

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

.popup-actions .btn {
    flex: 1;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    .auth-card {
        padding: 30px 20px;
    }
    
    .navbar-content {
        flex-direction: column;
        gap: 15px;
    }
    
    .dashboard-header {
        flex-direction: column;
        gap: 15px;
    }
    
    .dashboard-header h2 {
        font-size: 22px;
    }
    
    .dashboard-header .btn {
        width: 100%;
    }
    
    .task-header {
        flex-direction: column;
    }
    
    .priority-badge {
        margin-top: 10px;
    }
    
    .task-actions {
        flex-direction: column;
    }
    
    .navbar-user {
        flex-direction: column;
        width: 100%;
    }
    
    .navbar-user .btn {
        width: 100%;
    }
}

/* Checkbox Styles for Reminders */
.reminder-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 10px 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: background-color 0.2s;
    user-select: none;
}

.checkbox-label:hover {
    background-color: #f0f0f0;
}

.checkbox-label input[type="checkbox"] {
    margin-right: 10px;
    cursor: pointer;
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked + * {
    font-weight: 600;
    color: var(--primary-color);
}
.reminder-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    animation: slideIn 0.3s ease;
}

.reminder-content {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    max-width: 400px;
    width: 90%;
    position: relative;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border-left: 6px solid var(--secondary-color);
}

.reminder-content.urgency-critical {
    border-left-color: var(--danger-color);
    background: linear-gradient(135deg, #fff5f5, #ffe0e0);
    animation: pulse 1s infinite;
}

.reminder-content.urgency-high {
    border-left-color: var(--warning-color);
    background: linear-gradient(135deg, #fff9f0, #ffefdb);
}

.reminder-content.urgency-medium {
    border-left-color: var(--secondary-color);
}

.reminder-content h3 {
    margin-bottom: 10px;
    font-size: 20px;
    color: var(--dark-color);
}

.reminder-content p {
    color: #666;
    margin-bottom: 20px;
    font-size: 16px;
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 24px;
    cursor: pointer;
    color: #999;
}

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

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

.reminder-actions .btn {
    flex: 1;
    text-align: center;
    padding: 10px;
    font-size: 14px;
}

/* Pulse animation for critical reminders */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.95;
    }
}