:root {
    --bg: #f8fafc;
    --bg-soft: #f1f5f9;
    --card: #ffffff;
    --texto: #1e293b;
    --texto-fraco: #64748b;
    --borda: #cbd5e1;
    --sombra: rgba(0, 0, 0, 0.06);
    /* Cores das Colunas */
    --pendente: #b91c1c;
    --andamento: #1d4ed8;
    --concluido: #15803d;
    /* Prioridades */
    --baixa: #64748b;
    --media: #b45309;
    --alta: #991b1b;
    --primaria: #0f172a;
    --tarefa-bg: #ffffff;
}

body.tema-escuro {
    --bg: #0f172a;
    --bg-soft: #1e2937;
    --card: #1e293b;
    --texto: #f8fafc;
    --texto-fraco: #94a3b8;
    --borda: #334155;
    --sombra: rgba(0, 0, 0, 0.4);
    --primaria: #3b82f6;
    /* Card levemente mais claro que o fundo da coluna para destacar no escuro */
    --tarefa-bg: #2d3748;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--texto);
    padding: 24px;
    transition: background 0.2s ease, color 0.2s ease;
}

.cabecalho {
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.cabecalho h1 {
    margin: 0 0 6px;
}

.cabecalho p {
    margin: 0;
    color: var(--texto-fraco);
}

.painel-controle {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr;
    gap: 8px;
    margin-bottom: 12px;
}

.painel-controle input,
.painel-controle select {
    background: var(--card);
    color: var(--texto);
    border: 1px solid var(--borda);
    border-radius: 8px;
    padding: 9px 10px;
    font: inherit;
}

.resumo {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 16px;
}

.resumo-item {
    background: var(--card);
    border: 1px solid var(--borda);
    border-radius: 10px;
    padding: 10px;
    box-shadow: 0 2px 8px var(--sombra);
}

.kanban {
    display: grid;
    grid-template-columns: repeat(3, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.coluna {
    background: var(--bg-soft);
    border: 1px solid var(--borda);
    border-radius: 10px;
    padding: 12px;
    min-height: 350px;
}

.coluna[data-status="pendente"] h2 {
    color: var(--pendente);
}

.coluna[data-status="andamento"] h2 {
    color: var(--andamento);
}

.coluna[data-status="concluido"] h2 {
    color: var(--concluido);
}

.coluna-topo {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 12px;
}

.coluna-topo h2 {
    margin: 0;
    font-size: 1.1rem;
}

.btn-add,
.tarefa-acoes button,
#toggleArchive,
.btn-secundario {
    border: none;
    border-radius: 7px;
    padding: 7px 10px;
    cursor: pointer;
}

.btn-add {
    background: var(--primaria);
    color: #fff;
}

.btn-secundario {
    background: #cbd5e1;
    color: #1f2937;
}

body.tema-escuro .btn-secundario {
    background: #475569;
    color: #f8fafc;
}

.lista-tarefas {
    min-height: 280px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.lista-tarefas.drag-over {
    outline: 2px dashed var(--primaria);
    border-radius: 8px;
    padding: 6px;
}

.tarefa {
    background: var(--tarefa-bg);
    border: 1px solid var(--borda);
    color: var(--texto);
    border-radius: 8px;
    padding: 10px;
    cursor: grab;
    box-shadow: 0 2px 8px var(--sombra);
    transition: transform 0.15s ease, background 0.2s ease;
}

.tarefa:hover {
    transform: translateY(-2px);
}

.tarefa:active {
    cursor: grabbing;
}

.tarefa h3 {
    margin: 0 0 8px;
    font-size: 1rem;
}

.tarefa p {
    margin: 0 0 8px;
    font-size: 0.9rem;
    color: var(--texto-fraco);
}

.badge-prioridade {
    display: inline-block;
    border-radius: 999px;
    padding: 4px 10px;
    color: #fff;
    font-size: 0.75rem;
    margin-bottom: 8px;
}

.badge-prioridade.baixa {
    background: var(--baixa);
}

.badge-prioridade.media {
    background: var(--media);
    color: #fff;
}

.badge-prioridade.alta {
    background: var(--alta);
}

.tarefa-acoes {
    display: flex;
    gap: 8px;
}

.btn-editar {
    background: #457b9d;
    color: #fff;
}

.btn-excluir {
    background: #be123c;
    color: #fff;
}

.arquivo {
    background: var(--card);
    border: 1px solid var(--borda);
    border-radius: 10px;
    padding: 12px;
}

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

.arquivo-lista {
    margin-top: 10px;
    display: grid;
    gap: 8px;
}

.arquivo-item {
    border: 1px solid var(--borda);
    border-radius: 8px;
    padding: 8px;
    background: var(--bg-soft);
}

.oculto {
    display: none !important;
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    z-index: 10;
}

.modal.oculto {
    display: none !important;
}

.modal-conteudo {
    width: 100%;
    max-width: 500px;
    background: var(--card);
    border-radius: 12px;
    border: 1px solid var(--borda);
    padding: 16px;
    position: relative;
}

.btn-fechar-modal {
    position: absolute;
    top: 8px;
    right: 10px;
    border: none;
    background: transparent;
    color: var(--texto-fraco);
    font-size: 1rem;
    cursor: pointer;
}

.modal-conteudo h2 {
    margin: 0 0 12px;
}

.form-tarefa {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-tarefa input,
.form-tarefa textarea,
.form-tarefa select {
    width: 100%;
    border: 1px solid var(--borda);
    border-radius: 8px;
    padding: 10px;
    font: inherit;
    background: var(--card);
    color: var(--texto);
}

.form-tarefa textarea {
    resize: vertical;
    min-height: 90px;
}

.form-acoes {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 8px;
}

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #1e293b;
    color: #fff;
    padding: 10px 14px;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
    z-index: 20;
}

@media (max-width: 900px) {
    .painel-controle,
    .resumo,
    .kanban {
        grid-template-columns: 1fr;
    }

    .cabecalho {
        flex-direction: column;
        align-items: flex-start;
    }
}