* {
    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;
    padding: 20px;
}

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

/* Cabeçalho */
.header {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    margin-bottom: 20px;
    text-align: center;
}

.header h1 {
    color: #667eea;
    font-size: 32px;
    margin-bottom: 10px;
}

.header p {
    color: #666;
    font-size: 16px;
}

/* Estatísticas */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    text-align: center;
    transition: transform 0.3s;
}

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

.stat-number {
    font-size: 42px;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 13px;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

/* Seção de adição */
.add-section {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    margin-bottom: 20px;
}

.input-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

input[type="text"], select, .form-control {
    flex: 1;
    min-width: 200px;
    padding: 14px 18px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.3s;
    font-family: inherit;
}

input[type="text"]:focus, select:focus, .form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

/* Categorias */
.categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.category-card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    transition: transform 0.3s;
}

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

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f0f0;
}

.category-title {
    font-size: 20px;
    font-weight: 700;
    color: #333;
    display: flex;
    align-items: center;
    gap: 8px;
}

.category-count {
    background: #667eea;
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

/* Lista de tarefas */
.checklist-items {
    list-style: none;
}

.checklist-item {
    display: flex;
    align-items: center;
    padding: 14px;
    margin-bottom: 10px;
    background: #f8f9fa;
    border-radius: 10px;
    transition: all 0.3s;
    cursor: pointer;
}

.checklist-item:hover {
    background: #e9ecef;
    transform: translateX(5px);
}

.checklist-item.completed {
    opacity: 0.6;
}

.checklist-item.completed .item-text {
    text-decoration: line-through;
    color: #999;
}

.checkbox {
    width: 22px;
    height: 22px;
    border: 2px solid #667eea;
    border-radius: 6px;
    margin-right: 14px;
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    transition: all 0.3s;
}

.checkbox:hover {
    background: rgba(102, 126, 234, 0.1);
}

.checkbox.checked {
    background: #667eea;
}

.checkbox.checked::after {
    content: "✓";
    position: absolute;
    color: white;
    font-size: 16px;
    font-weight: bold;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.item-text {
    flex: 1;
    font-size: 15px;
    color: #333;
    word-break: break-word;
}

.item-actions {
    display: flex;
    gap: 8px;
    margin-left: 10px;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px 10px;
    color: #999;
    font-size: 18px;
    transition: all 0.3s;
    border-radius: 6px;
}

.btn-icon:hover {
    color: #667eea;
    background: rgba(102, 126, 234, 0.1);
}

.btn-icon.delete:hover {
    color: #dc3545;
    background: rgba(220, 53, 69, 0.1);
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: #999;
    font-style: italic;
    font-size: 15px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 15px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.3s ease-out;
}

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

.modal-header {
    padding: 25px;
    border-bottom: 2px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    color: #333;
    font-size: 22px;
    margin: 0;
}

.close-btn {
    background: none;
    border: none;
    font-size: 32px;
    color: #999;
    cursor: pointer;
    transition: color 0.3s;
    line-height: 1;
    padding: 0;
    width: 30px;
    height: 30px;
}

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

.modal-body {
    padding: 25px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
    font-size: 14px;
}

.modal-footer {
    padding: 20px 25px;
    border-top: 2px solid #f0f0f0;
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

/* Responsivo */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .header {
        padding: 20px;
    }

    .header h1 {
        font-size: 24px;
    }

    .input-group {
        flex-direction: column;
    }

    input[type="text"], select {
        min-width: 100%;
    }

    .btn {
        width: 100%;
    }

    .categories {
        grid-template-columns: 1fr;
    }

    .stat-number {
        font-size: 32px;
    }
}

/* Loading indicator */
.loading {
    text-align: center;
    padding: 40px;
    color: #667eea;
    font-size: 18px;
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}