:root {
    --background-color: #f4f7f6;
    --column-bg: #dfe3e6;
    --card-bg: #ffffff;
    --text-color: #333;
    --border-color: #cdd2d7;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --primary-button-bg: #007bff;
    --primary-button-text: #fff;
    --danger-button-bg: #dc3545;
    --header-bg: #e9ecef;
    --modal-backdrop: rgba(0,0,0,0.4);
}

body.dark-mode {
    --background-color: #1a1a2e;
    --column-bg: #16213e;
    --card-bg: #0f3460;
    --text-color: #e0e0e0;
    --border-color: #4a4a6a;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --primary-button-bg: #1e90ff;
    --danger-button-bg: #e94560;
    --header-bg: #0f3460;
    --modal-backdrop: rgba(0,0,0,0.6);
}

body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    line-height: 1.6;
}

header {
    background-color: var(--header-bg);
    padding: 15px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 4px var(--shadow-color);
}

header h1 {
    margin: 0 0 10px 0;
    font-size: 2em;
}

.board-actions button, .board-actions input {
    padding: 8px 12px;
    margin: 5px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background-color: var(--primary-button-bg);
    color: var(--primary-button-text);
    font-size: 0.9em;
}
.board-actions button:hover {
    opacity: 0.9;
}
#resetBoardBtn {
    background-color: var(--danger-button-bg);
}


#kanban-board {
    display: flex;
    padding: 20px;
    overflow-x: auto; /* Permite scroll horizontal */
    min-height: calc(100vh - 150px); /* Ajustar conforme altura do header */
    align-items: flex-start; /* Alinha colunas no topo */
}

.column {
    background-color: var(--column-bg);
    min-width: 300px;
    max-width: 350px;
    margin-right: 15px;
    border-radius: 8px;
    padding: 10px;
    box-shadow: 0 2px 5px var(--shadow-color);
    flex-shrink: 0; /* Impede que as colunas encolham */
    transition: background-color 0.3s;
}
.column:last-child {
    margin-right: 0;
}

.column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 10px 15px 10px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 10px;
}

.column-title {
    font-size: 1.2em;
    font-weight: bold;
    cursor: pointer; /* Para indicar que é editável */
}
.column-title:hover {
    opacity: 0.8;
}

.column-actions button, .card-actions button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1em;
    padding: 5px;
    color: var(--text-color);
}
.column-actions button:hover, .card-actions button:hover {
    opacity: 0.7;
}
.delete-column-btn {
    color: var(--danger-button-bg) !important;
}


.cards-container {
    min-height: 100px; /* Para ter uma área de drop mesmo vazia */
    padding-bottom: 10px;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px 15px;
    margin-bottom: 10px;
    cursor: grab;
    box-shadow: 0 1px 3px var(--shadow-color);
    transition: background-color 0.3s, border-color 0.3s;
}
.card:last-child {
    margin-bottom: 0;
}

.card h4 {
    margin: 0 0 5px 0;
    font-size: 1.1em;
    cursor: text; /* Para edição inline */
}

.card p {
    margin: 0;
    font-size: 0.9em;
    color: var(--text-color);
    opacity: 0.9;
    cursor: text; /* Para edição inline */
    white-space: pre-wrap; /* Mantém quebras de linha */
}

.card .card-actions {
    text-align: right;
    margin-top: 8px;
}
.card .card-actions .delete-card-btn {
    font-size: 0.8em;
    color: var(--danger-button-bg);
}

.card.dragging {
    opacity: 0.5;
    transform: rotate(3deg);
}

.column.drag-over {
    border: 2px dashed var(--primary-button-bg);
    background-color: color-mix(in srgb, var(--column-bg) 80%, var(--primary-button-bg) 20%);
}

/* Estilos para inputs de edição inline */
.editable-input {
    width: calc(100% - 10px); /* Ajustar padding */
    padding: 5px;
    margin: 5px 0;
    border: 1px solid var(--primary-button-bg);
    border-radius: 4px;
    font-family: inherit;
    background-color: var(--card-bg);
    color: var(--text-color);
}
textarea.editable-input {
    min-height: 60px;
    resize: vertical;
}


/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: var(--modal-backdrop);
}

.modal-content {
    background-color: var(--background-color);
    margin: 15% auto;
    padding: 25px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 80%;
    max-width: 500px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    position: relative;
}

.modal-content h3 {
    margin-top: 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 15px;
}

.modal-content input[type="text"],
.modal-content textarea {
    width: calc(100% - 22px); /* Considera padding e border */
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    font-size: 1em;
    background-color: var(--card-bg); /* Usar cor do card para contraste */
    color: var(--text-color);
}
.modal-content textarea {
    min-height: 100px;
    resize: vertical;
}

.modal-content button {
    background-color: var(--primary-button-bg);
    color: var(--primary-button-text);
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
}
.modal-content button:hover {
    opacity: 0.9;
}

.close-button, .close-column-modal-button {
    color: var(--text-color);
    opacity: 0.7;
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
}

.close-button:hover,
.close-button:focus,
.close-column-modal-button:hover,
.close-column-modal-button:focus {
    color: var(--danger-button-bg);
    text-decoration: none;
    cursor: pointer;
}

/* Responsividade */
@media (max-width: 768px) {
    #kanban-board {
        padding: 10px;
    }
    .column {
        min-width: 280px; /* Colunas um pouco menores no mobile */
    }
    .modal-content {
        width: 90%;
        margin: 20% auto;
    }
    header h1 {
        font-size: 1.5em;
    }
    .board-actions {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }
    .board-actions button {
        font-size: 0.8em;
        padding: 6px 10px;
    }
}