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

:root {
    --primary-dark: #1A1A2E;
    --secondary-dark: #16213E;
    --tertiary-dark: #0F3460;
    --accent-red: #E94560;
    --white: #FFFFFF;
    --gray-light: #F8F9FA;
    --gray-medium: #6C757D;
    --gray-dark: #343A40;
    --success: #28A745;
    --warning: #FFC107;
    --info: #17A2B8;
    --border-radius: 8px;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-dark) 100%);
    color: var(--white);
    min-height: 100vh;
    line-height: 1.6;
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.app-header {
    background: var(--tertiary-dark);
    padding: 1rem 0;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.app-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--white);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.title-icon {
    font-size: 2rem;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* Button Styles */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: #d73651;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: var(--gray-light);
    transform: translateY(-2px);
}

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

.btn-success:hover {
    background: #218838;
}

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

.btn-warning:hover {
    background: #e0a800;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 1rem;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--white);
    color: var(--primary-dark);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid #dee2e6;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--primary-dark);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-medium);
    padding: 0.25rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--gray-light);
    color: var(--primary-dark);
}

.modal-body {
    padding: 1.5rem;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--primary-dark);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #dee2e6;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-red);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.1);
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

.group-section {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #dee2e6;
}

.group-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.group-section h3 {
    margin-bottom: 1rem;
    color: var(--tertiary-dark);
}

/* Main Content */
.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
    width: 100%;
}

/* Control Panel */
.control-panel {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
}

.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.filters select {
    padding: 0.5rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-dark);
    font-size: 0.9rem;
    min-width: 150px;
}

.stats-panel {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-red);
}

/* Daily Highlight */
.daily-highlight {
    background: linear-gradient(135deg, var(--accent-red), #ff6b8a);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    text-align: center;
}

.daily-highlight h3 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

/* Tasks Container */
.tasks-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--border-radius);
    padding: 2rem;
    color: var(--primary-dark);
    box-shadow: var(--box-shadow);
}

.tasks-header {
    margin-bottom: 2rem;
    text-align: center;
}

.tasks-header h2 {
    color: var(--primary-dark);
    font-size: 1.8rem;
}

/* Task Item Styles */
.task-item {
    background: var(--white);
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: var(--transition);
    position: relative;
}

.task-item:hover {
    border-color: var(--accent-red);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

.task-item.completed {
    opacity: 0.7;
    border-color: var(--success);
}

.task-item.in-progress {
    border-left: 4px solid var(--warning);
}

.task-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.task-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin: 0;
    flex: 1;
    min-width: 200px;
}

.task-meta {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.task-category {
    background: var(--tertiary-dark);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.task-status {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.task-status.pendente {
    background: var(--gray-light);
    color: var(--gray-dark);
}

.task-status.andamento {
    background: #fff3cd;
    color: #856404;
}

.task-status.concluida {
    background: #d4edda;
    color: #155724;
}

.task-description {
    margin-bottom: 1rem;
    color: var(--gray-medium);
    line-height: 1.5;
}

.task-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.task-info {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--gray-medium);
}

.task-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.task-actions .btn {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

/* Voting Section */
.voting-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1rem 0;
    padding: 1rem;
    background: var(--gray-light);
    border-radius: var(--border-radius);
}

.vote-count {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--accent-red);
}

.vote-buttons {
    display: flex;
    gap: 0.5rem;
}

.vote-btn {
    padding: 0.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
    background: var(--white);
    border: 2px solid #dee2e6;
}

.vote-btn:hover {
    transform: scale(1.1);
}

.vote-btn.voted {
    background: var(--accent-red);
    color: var(--white);
    border-color: var(--accent-red);
}

.vote-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--gray-medium);
    display: none;
}

.empty-state.show {
    display: block;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: 1rem;
    color: var(--primary-dark);
}

/* Loading Spinner */
.loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.loading-spinner.show {
    display: flex;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid var(--accent-red);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 3000;
    max-width: 350px;
}

.toast {
    background: var(--white);
    color: var(--primary-dark);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
    box-shadow: var(--box-shadow);
    border-left: 4px solid var(--accent-red);
    animation: slideIn 0.3s ease;
    position: relative;
}

.toast.success {
    border-left-color: var(--success);
}

.toast.warning {
    border-left-color: var(--warning);
}

.toast.error {
    border-left-color: var(--accent-red);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Footer */
.app-footer {
    background: var(--primary-dark);
    color: var(--white);
    text-align: center;
    padding: 1rem;
    margin-top: auto;
    border-top: 1px solid var(--secondary-dark);
}

.app-footer p {
    margin: 0;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .app-title {
        font-size: 1.5rem;
    }
    
    .header-actions {
        justify-content: center;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .control-panel {
        padding: 1rem;
    }
    
    .filters {
        flex-direction: column;
    }
    
    .filters select {
        min-width: auto;
    }
    
    .stats-panel {
        justify-content: center;
        gap: 1rem;
    }
    
    .tasks-container {
        padding: 1rem;
    }
    
    .task-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .task-meta {
        width: 100%;
        justify-content: flex-start;
    }
    
    .task-footer {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .task-actions {
        width: 100%;
        justify-content: flex-start;
    }
    
    .voting-section {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .modal-content {
        margin: 1rem;
        max-width: calc(100% - 2rem);
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .toast-container {
        left: 10px;
        right: 10px;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
    
    .task-item {
        padding: 1rem;
    }
    
    .task-title {
        font-size: 1.1rem;
    }
    
    .daily-highlight {
        padding: 1rem;
    }
    
    .empty-icon {
        font-size: 3rem;
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Styles for Better Accessibility */
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--accent-red);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .task-item {
        border-width: 3px;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}