/* Cost Dashboard */

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

.costs-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    border-bottom: 1px solid rgba(232, 121, 29, 0.12);
}

.costs-header h1 {
    font-size: 1.4rem;
    margin-right: auto;
}

.back-link {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition);
}

.back-link:hover {
    color: var(--accent-hover);
}

.period-tabs {
    display: flex;
    gap: 4px;
}

.period-tab {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid rgba(232, 121, 29, 0.15);
    border-radius: 20px;
    padding: 6px 14px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--transition);
}

.period-tab:hover {
    color: var(--text);
    border-color: var(--accent);
}

.period-tab.active {
    background: var(--accent);
    color: var(--bg-dark);
    border-color: var(--accent);
    font-weight: 600;
}

.costs-main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px 24px;
}

/* Summary Cards */

.summary-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}

.card {
    background: var(--bg-light);
    border: 1px solid rgba(232, 121, 29, 0.08);
    border-radius: var(--radius);
    padding: 18px 20px;
}

.card-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.card-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.2;
}

.card-change {
    font-size: 0.75rem;
    margin-top: 4px;
}

.card-change.positive {
    color: var(--accent-red);
}

.card-change.negative {
    color: var(--accent-green);
}

/* Charts */

.chart-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.chart-container {
    background: var(--bg-light);
    border: 1px solid rgba(232, 121, 29, 0.08);
    border-radius: var(--radius);
    padding: 18px 20px;
}

.chart-container h3 {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 12px;
    font-weight: 500;
}

/* Tables */

.tables-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.table-container {
    background: var(--bg-light);
    border: 1px solid rgba(232, 121, 29, 0.08);
    border-radius: var(--radius);
    padding: 18px 20px;
    overflow-x: auto;
}

.table-container h3 {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 12px;
    font-weight: 500;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

th {
    text-transform: uppercase;
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    border-bottom: 1px solid rgba(232, 121, 29, 0.15);
    padding: 8px 10px;
    text-align: left;
    font-weight: 600;
}

td {
    padding: 8px 10px;
    border-bottom: 1px solid rgba(232, 121, 29, 0.06);
    color: var(--text);
}

tr:hover td {
    background: rgba(232, 121, 29, 0.04);
}

.clickable {
    cursor: pointer;
}

.clickable:hover td {
    background: rgba(232, 121, 29, 0.08);
}

/* Session Detail */

.session-detail {
    margin-top: 20px;
}

.session-detail.hidden {
    display: none;
}

.session-detail h2 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.session-detail h2 span {
    color: var(--accent);
}

.close-detail {
    background: var(--bg-light);
    color: var(--text);
    border: 1px solid rgba(232, 121, 29, 0.15);
    border-radius: var(--radius-sm);
    padding: 6px 16px;
    font-size: 0.8rem;
    cursor: pointer;
    margin-bottom: 16px;
    transition: all var(--transition);
}

.close-detail:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.view-btn {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: var(--radius-sm);
    padding: 3px 10px;
    font-size: 0.72rem;
    cursor: pointer;
    transition: all var(--transition);
}

.view-btn:hover {
    background: var(--accent);
    color: var(--bg-dark);
}

/* Responsive */

@media (max-width: 768px) {
    .costs-header {
        flex-wrap: wrap;
    }

    .summary-cards {
        grid-template-columns: 1fr 1fr;
    }

    .chart-row,
    .tables-section,
    .detail-grid {
        grid-template-columns: 1fr;
    }
}