/* Backlog Section */
.backlog-section {
    display: none; /* Hidden by default, JS will show if needed */
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.6rem;
    flex: 0 0 auto;
    min-height: 0;
    overflow: visible;
}

.backlog-section.visible {
    display: grid;
}

.notes-section {
    display: none;
    flex: 0 0 auto;
    min-height: 0;
}

.notes-section.visible {
    display: block;
}

.notes-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    min-height: var(--backlog-column-min-height);
    height: var(--backlog-column-min-height);
    overflow: hidden;
}

.notes-pad-input {
    width: 100%;
    height: 100%;
    resize: none;
    overflow-y: auto;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    line-height: 1.45;
    padding: 0.75rem 0.85rem;
}

.notes-pad-input::placeholder {
    color: var(--text-muted);
}

.backlog-column {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    overflow: visible;
    min-height: var(--backlog-column-min-height);
    min-width: 0;
}

.backlog-header {
    padding: 0.4rem 0.6rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.backlog-title-input {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.8rem;
    font-weight: 600;
    font-family: inherit;
    outline: none;
    padding: 0.15rem 0.25rem;
    border-radius: 3px;
    transition: all 0.15s;
}

.backlog-title-input:hover {
    background: var(--bg-tertiary);
}

.backlog-title-input:focus {
    background: var(--bg-tertiary);
}

.backlog-tasks {
    flex: 1;
    padding: 0.35rem 0.4rem;
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-height: 60px;
}

/* Mobile */
@media (max-width: 768px) {
    .backlog-section {
        grid-template-columns: 1fr;
        flex: 0 0 auto; /* Auto height on mobile */
        max-height: 60vh; /* But limit to 60% viewport */
    }
    
    .week-grid {
        flex: 0 0 auto;
    }

    .notes-card {
        max-height: 60vh;
        height: var(--backlog-column-min-height);
    }
}