/* Saifi Academic Calendar
 * Header → toolbar (season filter + legend) → term list.
 * Desktop (> 900px): term list is a table inside one soft panel.
 * Tablet / phone (<= 900px): each term becomes a card; empty events are hidden.
 */
.sac {
	--sac-primary: #003B5C;
	--sac-reg: #009CA6;
	--sac-comp: #F2A900;
	--sac-holiday: #FA4616;
	--sac-bonus: #F2A900;
	--sac-text: #4D4D4D;
	--sac-radius: 20px;
	--sac-muted: color-mix(in srgb, var(--sac-primary) 38%, #8a96a3);
	--sac-line: color-mix(in srgb, var(--sac-primary) 9%, transparent);
	--sac-tint: color-mix(in srgb, var(--sac-primary) 4%, #fff);
	--sac-shadow: 0 1px 2px rgba(0, 59, 92, .04), 0 16px 40px -20px rgba(0, 59, 92, .22);
	--sac-ease: cubic-bezier(.2, .7, .2, 1);
	max-width: 1140px;
	margin: 0 auto;
	color: var(--sac-text);
	font-family: inherit;
	font-variant-numeric: tabular-nums;
}
.sac *, .sac *::before, .sac *::after { box-sizing: border-box; }

.sac-sr-only {
	position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
	overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- Header ---------- */
.sac-header { margin-bottom: 36px; }
.sac-eyebrow {
	display: inline-flex; align-items: center; gap: 10px; margin-bottom: 14px;
	color: var(--sac-reg); font-size: 14px; font-weight: 600; letter-spacing: .02em;
}
.sac-eyebrow::before { content: ""; width: 24px; height: 2px; border-radius: 2px; background: currentColor; }
.sac-heading {
	margin: 0; max-width: 28ch; color: var(--sac-primary);
	font-size: clamp(28px, 4vw, 44px); font-weight: 600; line-height: 1.08; letter-spacing: -.025em;
	text-wrap: balance;
}
.sac-intro { max-width: 60ch; margin: 14px 0 0; font-size: 16px; line-height: 1.65; text-wrap: pretty; }

/* ---------- Toolbar: season filter (segmented) + legend ---------- */
.sac-toolbar {
	display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
	gap: 14px 24px; margin-bottom: 18px;
}
.sac-filter {
	display: inline-flex; gap: 2px; padding: 4px; border-radius: 12px;
	background: color-mix(in srgb, var(--sac-primary) 6%, #fff);
}
.sac .sac-filter-btn {
	appearance: none; margin: 0; padding: 8px 14px; border: 0; border-radius: 9px;
	background: transparent; color: var(--sac-muted); box-shadow: none;
	font: inherit; font-size: 14px; font-weight: 500; line-height: 1.2; white-space: nowrap; cursor: pointer;
	transition: background-color .2s var(--sac-ease), color .2s var(--sac-ease), box-shadow .2s, transform .15s;
}
.sac .sac-filter-btn:hover { background: transparent; color: var(--sac-primary); }
.sac .sac-filter-btn:active { transform: scale(.97); }
.sac .sac-filter-btn[aria-pressed="true"] {
	background: #fff; color: var(--sac-primary); font-weight: 600;
	box-shadow: 0 1px 2px rgba(0, 59, 92, .08), 0 2px 8px -2px rgba(0, 59, 92, .12);
}
.sac .sac-filter-btn:focus-visible { outline: 2px solid var(--sac-reg); outline-offset: 1px; }

.sac-legend { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 0; padding: 0; list-style: none; color: var(--sac-muted); font-size: 13px; font-weight: 500; }
.sac-legend-item { display: inline-flex; align-items: center; gap: 8px; margin: 0; }
.sac-legend-item::before, .sac-key, .sac-chip::before {
	content: ""; display: inline-block; flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--sac-k);
}
.sac-legend-item--reg, .sac-key--reg, .sac-chip--reg { --sac-k: var(--sac-reg); }
.sac-legend-item--comp, .sac-key--comp, .sac-chip--comp { --sac-k: var(--sac-comp); }
.sac-legend-item--holiday, .sac-key--holiday, .sac-chip--holiday { --sac-k: var(--sac-holiday); }

/* ---------- Term list (desktop table) ---------- */
.sac-panel { padding: 6px 8px; border-radius: var(--sac-radius); background: #fff; box-shadow: var(--sac-shadow); }
.sac-table { width: 100%; margin: 0; border: 0; border-collapse: collapse; background: transparent; }
.sac-table th, .sac-table td { border: 0; background: transparent; }
.sac-table thead th {
	padding: 14px 18px; border-bottom: 1px solid var(--sac-line); color: var(--sac-muted); text-align: left;
	font-size: 13px; font-weight: 500; letter-spacing: 0; text-transform: none; white-space: nowrap;
}
.sac-table thead .sac-key { margin-right: 8px; vertical-align: 1px; }
.sac-table tbody th, .sac-table tbody td {
	padding: 20px 18px; text-align: left; vertical-align: middle; font-size: 15px; font-weight: 400; line-height: 1.4;
}
.sac-row + .sac-row > * { border-top: 1px solid var(--sac-line); }
.sac-row {
	transition: background-color .2s var(--sac-ease);
	animation: sac-in .55s var(--sac-ease) backwards; animation-delay: calc(var(--i, 0) * 45ms);
}
.sac-row:hover { background: var(--sac-tint); }
.sac-row[hidden] { display: none; }

.sac-cell--term { display: flex; align-items: baseline; gap: 14px; }
.sac-idx { flex: none; width: 22px; color: var(--sac-muted); font-size: 13px; font-weight: 500; }
.sac-term-name { display: block; color: var(--sac-primary); font-size: 16px; font-weight: 600; letter-spacing: -.01em; white-space: nowrap; }
.sac-badges { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 7px; }
.sac-badge {
	display: inline-block; padding: 3px 8px; border-radius: 5px;
	font-size: 12px; font-weight: 600; line-height: 1.35; letter-spacing: .01em; white-space: nowrap;
}
.sac-badge--bonus { background: color-mix(in srgb, var(--sac-bonus) 20%, #fff); color: color-mix(in srgb, var(--sac-bonus) 42%, #000); }

.sac-dates { color: var(--sac-primary); font-weight: 500; white-space: nowrap; }

.sac-chip {
	display: inline-flex; align-items: center; gap: 8px; max-width: 100%; white-space: nowrap;
	padding: 6px 11px; border-radius: 8px;
	background: color-mix(in srgb, var(--sac-k) 9%, #fff);
	color: color-mix(in srgb, var(--sac-k) 48%, #000);
	font-size: 14px; font-weight: 500; line-height: 1.35;
}
.sac-chip strong { font-weight: 600; }
.sac-chip--holiday { flex-wrap: wrap; row-gap: 2px; white-space: normal; }
.sac-chip-sub { opacity: .85; }
.sac-ast { margin-left: -6px; font-size: .8em; cursor: help; }
.sac-none { color: color-mix(in srgb, var(--sac-muted) 55%, transparent); }
.sac-cell-label { display: none; }

.sac-footnote { margin: 14px 0 0; color: var(--sac-muted); font-size: 13px; line-height: 1.5; }

@keyframes sac-in { from { opacity: 0; transform: translateY(8px); } }

/* ---------- Cards (tablet + phone) ---------- */
@media (max-width: 900px) {
	.sac-header { margin-bottom: 28px; }
	.sac-toolbar { display: grid; grid-template-columns: minmax(0, 1fr); }
	.sac-filter { display: flex; overflow-x: auto; scrollbar-width: none; }
	.sac-filter::-webkit-scrollbar { display: none; }
	.sac .sac-filter-btn { flex: 1 0 auto; }

	.sac-panel { padding: 0; border-radius: 0; background: transparent; box-shadow: none; }
	.sac-table, .sac-table tbody { display: block; }
	.sac-table thead { display: none; }
	.sac-table tbody { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; gap: 14px; }
	.sac-row {
		display: flex; flex-direction: column; gap: 12px; padding: 20px;
		border-radius: 16px; background: #fff; box-shadow: var(--sac-shadow);
	}
	.sac-row:hover { background: #fff; }
	.sac-row + .sac-row > * { border-top: 0; }
	.sac-table tbody th, .sac-table tbody td { display: block; padding: 0; }

	.sac-cell--term { display: flex !important; align-items: flex-start; gap: 12px; }
	.sac-idx { width: auto; padding-top: 2px; }
	.sac-term-name { font-size: 18px; }
	.sac-cell--dates { padding: 0 0 14px !important; border-bottom: 1px solid var(--sac-line) !important; }
	.sac-dates { font-size: 16px; white-space: normal; }
	.sac-cell--dates .sac-cell-label { display: none; }

	.sac-cell.is-empty { display: none !important; }
	.sac-cell-label { display: block; margin-bottom: 6px; color: var(--sac-muted); font-size: 13px; font-weight: 500; }
}
@media (max-width: 600px) {
	.sac-table tbody { grid-template-columns: minmax(0, 1fr); }
	.sac-row { padding: 18px; }
}

@media (prefers-reduced-motion: reduce) {
	.sac-row { animation: none; }
	.sac .sac-filter-btn, .sac-row { transition: none; }
}