/*
 * budget-builder-specific layout.
 */

.sfl-activity .budget-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

.sfl-activity .budget-section h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0;
}

.sfl-activity .budget-section h3 i {
    color: var(--sfl-primary);
    font-size: 1.1rem;
}

.sfl-activity .budget-table-header {
    display: grid;
    grid-template-columns: 1fr 120px 44px;
    gap: 0.5rem;
    align-items: center;
    padding: 0.25rem 0.5rem;
    margin-top: 0.5rem;
    border-bottom: 1px solid var(--sfl-border);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--sfl-text-muted);
}

.sfl-activity .budget-table-header .amount-col {
    text-align: right;
}

.sfl-activity .budget-rows {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin: 0 0 1rem;
}

.sfl-activity .budget-row {
    display: grid;
    grid-template-columns: 1fr 120px 44px;
    gap: 0.5rem;
    align-items: center;
    padding: 0.35rem 0.5rem;
    border-radius: 6px;
}

.sfl-activity .budget-row:nth-child(odd) {
    background: #FAF8F3;
}

.sfl-activity .budget-row input[list],
.sfl-activity .budget-row input[type="number"] {
    min-height: 46px;
    font-size: 1.05rem;
}

.sfl-activity .budget-row input[type="number"] {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.sfl-activity .budget-row-remove {
    background: transparent;
    border: 2px solid var(--sfl-border);
    color: var(--sfl-text-muted);
    border-radius: 8px;
    font-size: 1.1rem;
    cursor: pointer;
    height: 46px;
    width: 44px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.sfl-activity .budget-row-remove:hover {
    border-color: var(--sfl-danger);
    color: var(--sfl-danger);
}

.sfl-activity .budget-add-row {
    background: transparent;
    border: 2px dashed var(--sfl-border);
    color: var(--sfl-primary);
    border-radius: 8px;
    padding: 0.6rem 1rem;
    font-family: 'Nunito', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    min-height: 46px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    justify-content: center;
}

.sfl-activity .budget-add-row:hover {
    border-color: var(--sfl-primary);
    background: #F0EDE5;
}

.sfl-activity .budget-section-total {
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--sfl-border);
    font-weight: 700;
    color: var(--sfl-text);
    font-size: 1.05rem;
    font-variant-numeric: tabular-nums;
}

.sfl-activity .budget-section-total strong {
    color: var(--sfl-primary);
    font-weight: 800;
    float: right;
}

/* Balance card */
.sfl-activity .budget-balance {
    border-top: 6px solid var(--sfl-text-muted);
    transition: border-color 0.2s ease;
}

.sfl-activity .budget-balance.balance-surplus { border-top-color: var(--sfl-accent); }
.sfl-activity .budget-balance.balance-tight   { border-top-color: var(--sfl-warning); }
.sfl-activity .budget-balance.balance-deficit { border-top-color: var(--sfl-danger); }

.sfl-activity .budget-balance-main {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
    margin-bottom: 0.5rem;
}

.sfl-activity .budget-balance-formula {
    font-weight: 700;
    color: var(--sfl-text-muted);
    font-size: 1.05rem;
    font-variant-numeric: tabular-nums;
}

.sfl-activity .budget-balance-label {
    font-weight: 700;
    color: var(--sfl-text);
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.04em;
}

.sfl-activity .budget-balance-value {
    font-weight: 800;
    font-size: 2rem;
    color: var(--sfl-primary);
    font-variant-numeric: tabular-nums;
}

.sfl-activity .balance-surplus .budget-balance-value { color: var(--sfl-accent); }
.sfl-activity .balance-tight   .budget-balance-value { color: var(--sfl-warning); }
.sfl-activity .balance-deficit .budget-balance-value { color: var(--sfl-danger); }

.sfl-activity .budget-balance-message {
    font-size: 1.05rem;
    line-height: 1.5;
    color: var(--sfl-text);
}

.sfl-activity .budget-charts {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--sfl-border);
}

.sfl-activity .budget-chart-title {
    font-weight: 700;
    color: var(--sfl-text);
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.sfl-activity .budget-chart-wrap {
    display: flex;
    flex-direction: column;
}

.sfl-activity .budget-chart-canvas {
    position: relative;
    height: 180px;
}

.sfl-activity .budget-chart-breakdown .budget-chart-canvas {
    height: 220px;
}

@media (max-width: 768px) {
    .sfl-activity .budget-charts {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .sfl-activity .budget-row,
    .sfl-activity .budget-table-header {
        grid-template-columns: 1fr 100px 44px;
    }
    .sfl-activity .budget-balance-value { font-size: 1.6rem; }
}

/*
 * Display mode — read-only snapshot used as a content primitive in lesson
 * intro/tips steps. Hides all editing affordances (add/remove/reset) and
 * locks the inputs so the pre-populated worked example reads as a static
 * diagram. Totals and charts remain visible because they're the teaching
 * content.
 */
body.display-mode .activity-header .controls-container,
body.display-mode .budget-add-row,
body.display-mode .budget-row-remove,
body.display-mode .budget-table-header > span:last-child {
    display: none !important;
}

body.display-mode .budget-row {
    grid-template-columns: 1fr 120px;
}

body.display-mode .budget-row-label,
body.display-mode .budget-row-amount {
    pointer-events: none;
    background: transparent;
    border-color: transparent;
    color: var(--sfl-text, #1f2937);
}

body.display-mode .budget-section {
    pointer-events: none;
}

body.display-mode .budget-balance {
    pointer-events: auto;
}