/**
 * dashboard-client/src/styles/sessions.css — Sessions tab (S39).
 *
 * Stacked memory graph + active sessions table. Depends on base.css
 * tokens (--panel, --border, --text, --muted, --accent, --ok, --warn,
 * --err). Mirrors the conventions in repos-metrics.css + metrics-extra.css.
 */

.sessions-tab {
	display: flex;
	flex-direction: column;
	gap: 14px;
}

.sessions-toolbar {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 8px;
	padding: 8px 0;
}

.sessions-toolbar h2 {
	margin: 0;
	font-size: 14px;
	font-weight: 600;
	color: var(--text);
}

.sessions-window-select {
	display: inline-flex;
	gap: 2px;
	padding: 2px;
	background: var(--panel);
	border: 1px solid var(--border);
	border-radius: 6px;
}

.sessions-window-btn {
	padding: 4px 10px;
	background: transparent;
	border: none;
	border-radius: 4px;
	color: var(--muted);
	font-size: 12px;
	cursor: pointer;
	transition: background 0.15s, color 0.15s;
}

.sessions-window-btn:hover {
	color: var(--text);
}

.sessions-window-btn.active {
	background: var(--accent);
	color: #0d1117;
	font-weight: 600;
}

.sessions-summary-tiles {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
	gap: 10px;
}

.sessions-chart {
	background: var(--panel);
	border: 1px solid var(--border);
	border-radius: 8px;
	padding: 12px;
}

.sessions-chart-empty,
.sessions-empty {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 160px;
	color: var(--muted);
	font-size: 14px;
	background: var(--panel);
	border: 1px solid var(--border);
	border-radius: 8px;
	padding: 32px;
	text-align: center;
}

.sessions-table-scroll {
	overflow-x: auto;
	background: var(--panel);
	border: 1px solid var(--border);
	border-radius: 8px;
}

.sessions-table {
	width: 100%;
	border-collapse: collapse;
	font-size: 13px;
}

.sessions-table th,
.sessions-table td {
	padding: 8px 10px;
	text-align: left;
	border-bottom: 1px solid var(--border);
	white-space: nowrap;
}

.sessions-table th {
	font-size: 11px;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.5px;
	color: var(--muted);
	background: rgba(255, 255, 255, 0.02);
	position: sticky;
	top: 0;
}

.sessions-table td.num {
	text-align: right;
	font-variant-numeric: tabular-nums;
}

.sessions-table tr:last-child td {
	border-bottom: none;
}

.sessions-table tr:hover td {
	background: rgba(88, 166, 255, 0.06);
}

.sessions-empty-row td {
	color: var(--muted);
	font-style: italic;
	text-align: center;
}

.sessions-pct-pill {
	display: inline-block;
	padding: 2px 8px;
	border-radius: 10px;
	font-size: 11px;
	font-weight: 600;
	font-variant-numeric: tabular-nums;
}

.sessions-pct-ok {
	background: rgba(63, 185, 80, 0.15);
	color: var(--ok);
}

.sessions-pct-warn {
	background: rgba(210, 153, 34, 0.15);
	color: var(--warn);
}

.sessions-pct-err {
	background: rgba(248, 81, 73, 0.15);
	color: var(--err);
}

.sessions-sparkline {
	display: inline-block;
	vertical-align: middle;
}

.sessions-sparkline-empty {
	color: var(--muted);
	font-size: 11px;
}

.sessions-meta {
	font-size: 11px;
	color: var(--muted);
}

.sessions-footer {
	font-size: 11px;
	color: var(--muted);
	margin-top: 6px;
}

@media (max-width: 640px) {
	.sessions-summary-tiles {
		grid-template-columns: 1fr;
	}
	.sessions-table th,
	.sessions-table td {
		font-size: 12px;
		padding: 6px 8px;
	}
}