/*
 * style.css - Academic Flow
 * Design: Moderno, Minimalista, Focado em Usabilidade.
 */

/* 1. Variáveis de Tema, Cores e Tipografia */
:root {
    /* Cores Comuns */
    --color-primary: #8a2be2; /* Roxo/Violeta acadêmico */
    --color-primary-hover: #6a1bb3;
    --color-success: #28a745;
    --color-danger: #dc3545;
    --color-warning: #ffc107;
    --color-info: #007bff; /* Azul para o botão de Notificação */
    --color-radius: 8px;
    --color-transition: 0.3s ease-in-out;
    --color-spacing: 1.5rem;
    
    /* Cores Específicas para Tipos de Tarefa */
    --color-prova: var(--color-danger);      /* Vermelho: Alta prioridade */
    --color-trabalho: var(--color-warning);  /* Amarelo: Atenção */
    --color-avaliacao: var(--color-info);    /* Azul: Padrão */
    --color-prazo: var(--color-success);     /* Verde: Conclusão/Meta */
    
    --color-secondary: #6c757d;
    --color-secondary-hover: #5a6268;
}

/* Tema CLARO (Padrão) */
[data-theme='light'] {
    --color-background: #f0f2f5; /* Fundo suave */
    --color-surface: #ffffff;   /* Superfícies brancas */
    --color-text: #2c3e50;
    --color-text-secondary: #7f8c8d;
    --color-border: #dfe4e9;
    --color-shadow: rgba(0, 0, 0, 0.1);
}

/* Tema ESCURO */
[data-theme='dark'] {
    --color-background: #1e1e1e;
    --color-surface: #2c2c2c;
    --color-text: #ecf0f1;
    --color-text-secondary: #bdc3c7;
    --color-border: #4a4a4a;
    --color-shadow: rgba(255, 255, 255, 0.05);
}

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

body {
    font-family: 'Open Sans', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    transition: background-color var(--color-transition), color var(--color-transition);
}

h2 {
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border);
}
h3 {
    margin-top: 1rem;
}

/* 2. Layout Principal */
.container {
    max-width: 1300px;
    margin: var(--color-spacing) auto;
    padding: 0 var(--color-spacing);
    display: grid;
    gap: var(--color-spacing);
    grid-template-columns: 1fr 2fr; /* Layout Desktop: Formulário (1/3) e Lista (2/3) */
}

/* 3. Header e Footer */
.main-header {
    background-color: var(--color-surface);
    padding: 1rem var(--color-spacing);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px var(--color-shadow);
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-primary);
}

.logo span {
    margin-right: 0.5rem;
    font-size: 1.8rem;
}

.main-footer {
    text-align: center;
    padding: 1rem;
    margin-top: var(--color-spacing);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.85rem;
}

/* 4. Componente Card (Geral) */
.card {
    background-color: var(--color-surface);
    padding: var(--color-spacing);
    border-radius: var(--color-radius);
    box-shadow: 0 4px 12px var(--color-shadow);
    transition: box-shadow 0.2s, background-color var(--color-transition);
}

/* 5. Formulário e Inputs */
.task-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 600;
}

input[type="text"], 
input[type="datetime-local"], 
select, 
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--color-radius);
    background-color: var(--color-background);
    color: var(--color-text);
    transition: border-color 0.3s, background-color var(--color-transition);
}

input:focus, 
select:focus, 
textarea:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(138, 43, 226, 0.25);
}

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

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}

/* 6. Botões */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--color-radius);
    cursor: pointer;
    font-weight: 600;
    transition: background-color var(--color-transition), transform 0.1s;
    font-size: 1rem;
}

.btn-primary { background-color: var(--color-primary); color: white; flex-grow: 1; }
.btn-primary:hover { background-color: var(--color-primary-hover); transform: translateY(-2px); }

.btn-success { background-color: var(--color-success); color: white; }
.btn-success:hover { background-color: #1e7e34; transform: translateY(-2px); }

.btn-danger { background-color: var(--color-danger); color: white; }
.btn-danger:hover { background-color: #c82333; transform: scale(1.05); }

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

/* Novo Botão de Informação/Notificação */
.btn-info {
    background-color: var(--color-info);
    color: white;
}
.btn-info:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

.btn-theme-toggle {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.5rem;
    border-radius: 50%;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--color-transition), border-color var(--color-transition);
}

.btn-theme-toggle:hover {
    background-color: var(--color-border);
}


/* 7. Lista de Tarefas (Dashboard) e Controles */
.list-controls {
    display: grid;
    grid-template-columns: 1fr 1fr auto; /* Input, Select, Button */
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.task-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.task-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-radius: var(--color-radius);
    background-color: var(--color-background);
    box-shadow: 0 2px 5px var(--color-shadow);
    transition: background-color var(--color-transition), transform 0.2s, opacity 0.4s ease;
    border-left: 5px solid; /* A cor da borda será definida via JS */
}

.task-item:hover {
    transform: translateY(-3px);
}

/* Classes Modificadoras (Cores de Destaque por Tipo) */
.type-Prova { border-left-color: var(--color-prova); }
.type-Trabalho { border-left-color: var(--color-trabalho); }
.type-Avaliacao { border-left-color: var(--color-avaliacao); }
.type-PrazoFinal { border-left-color: var(--color-prazo); }

.task-info {
    flex-grow: 1;
    min-width: 0;
}

.task-deadline {
    min-width: 150px;
    text-align: right;
    padding-left: 1rem;
}

.days-left {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.task-actions {
    display: flex;
    gap: 0.5rem;
    margin-left: 1rem;
}

.task-actions .btn {
    padding: 0.5rem 0.8rem;
    font-size: 0.85rem;
}

/* Animação Fade (Para exclusão) */
.fade-out {
    opacity: 0;
    transform: translateX(-20px);
}

/* Estado Vazio */
.empty-state {
    text-align: center;
    color: var(--color-text-secondary);
    padding: 2rem;
    font-style: italic;
    background-color: var(--color-surface);
    border: 1px dashed var(--color-border);
    border-radius: var(--color-radius);
}

/* Estilos Adicionais para o Gráfico Canvas */
.chart-container {
    margin-bottom: 1.5rem;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--color-radius);
    text-align: center;
}

.chart-container h3 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
    color: var(--color-text);
}

#task-chart {
    background-color: var(--color-background);
    border-radius: var(--color-radius);
    max-width: 100%;
}


/* 8. Responsividade */
@media (max-width: 900px) {
    .container {
        grid-template-columns: 1fr; /* Coluna única */
    }

    .form-section {
        order: 2; 
    }
    .list-section {
        order: 1;
    }
}

@media (max-width: 650px) {
    .list-controls {
        grid-template-columns: 1fr; /* Coluna única em mobile */
    }
}

@media (max-width: 550px) {
    .main-header {
        flex-direction: column;
        gap: 0.5rem;
    }

    .container {
        padding: 0 1rem;
    }

    .task-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .task-deadline {
        text-align: left;
        padding: 0;
        width: 100%;
    }

    .task-actions {
        width: 100%;
        justify-content: flex-end;
        margin-left: 0;
    }
}