/* The board: the page is a chessboard, content sits on panes snapped to its squares. */

:root {
	--cell: 56px;
	--cols: 10;

	--sq-dark: #243c2d;
	--sq-light: #2c4836;
	--paper: #e6e0c6;
	--ink: #1c2a21;
	--muted: #5a695d;
	--rule: rgba(28, 42, 33, 0.16);
	--hi: #f0c94a;
	--night: #142219;

	--nag-brilliant: #178f8a;
	--nag-good: #3a74a3;
	--nag-interesting: #e8973a;
	--nag-dubious: #f0c94a;
	--nag-blunder: #c0392f;

	--font: "Bricolage Grotesque", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html {
	background: var(--sq-dark);
	-webkit-text-size-adjust: 100%;
	text-size-adjust: 100%;
}

body {
	margin: 0;
	min-height: 100vh;
	color: var(--ink);
	font: 400 17px/1.5 var(--font);
	font-optical-sizing: auto;
	/* The squares themselves. Top-left square is dark; the canvas matches this parity. */
	background:
		repeating-conic-gradient(var(--sq-light) 0 25%, var(--sq-dark) 0 50%)
		0 0 / calc(var(--cell) * 2) calc(var(--cell) * 2);
	-webkit-tap-highlight-color: transparent;
}

#board {
	position: fixed;
	inset: 0;
	width: 100%;
	height: 100%;
	z-index: 0;
	pointer-events: none;
}

/* The 3D board fades in over the flat one, and the panes lift off it like cards. */
.three #board { animation: board-in 900ms ease-out both; }
.three .pane { box-shadow: 0 0 0 1px rgba(20, 34, 25, 0.35), 0 22px 48px -12px rgba(0, 0, 0, 0.55); }

@keyframes board-in {
	from { opacity: 0; }
	to { opacity: 1; }
}

.skip-link {
	position: absolute;
	left: var(--cell);
	top: 8px;
	z-index: 10;
	padding: 8px 12px;
	background: var(--paper);
	color: var(--ink);
	transform: translateY(-200%);
}
.skip-link:focus { transform: none; }

/* Layout: panes are placed on whole squares. */

.deck {
	position: relative;
	z-index: 1;
	display: flex;
	flex-wrap: wrap;
	align-items: flex-start;
	gap: var(--cell);
	min-height: 100vh;
	padding: calc(var(--cell) * 2) var(--cell);
}

.pane {
	background: var(--paper);
	width: calc(var(--cell) * 8);
	box-shadow: 0 0 0 1px rgba(20, 34, 25, 0.35);
}

.pane--drawer { width: calc(var(--cell) * 10); }

.js .pane--drawer:not(.is-open) { display: none; }

.pane--drawer.is-opening {
	animation: wipe 440ms steps(var(--cols), end) both;
}

@keyframes wipe {
	from { clip-path: inset(0 100% 0 0); }
	to { clip-path: inset(0 0 0 0); }
}

.pane__in {
	padding: calc(var(--cell) * 0.5) calc(var(--cell) * 0.5) calc(var(--cell) * 0.6);
}

/* Type */

.name {
	margin: 0 0 calc(var(--cell) * 0.5);
	font-size: calc(var(--cell) * 0.94);
	line-height: var(--cell);
	font-weight: 750;
	font-variation-settings: "opsz" 96;
	letter-spacing: -0.035em;
}

.pane p {
	margin: 0 0 0.9em;
	max-width: 34em;
}

.pane a {
	color: inherit;
	text-decoration: underline;
	text-decoration-thickness: 1px;
	text-underline-offset: 3px;
	text-decoration-color: rgba(28, 42, 33, 0.4);
}

.pane a:hover {
	background: var(--hi);
	text-decoration-color: var(--ink);
}

a:focus-visible,
button:focus-visible,
h2:focus-visible {
	outline: 2px solid var(--ink);
	outline-offset: 2px;
}

.hint {
	color: var(--muted);
	font-size: 15px;
}

/* The inline knight: a tiny square you can press to make a move. */

.kn {
	display: inline-grid;
	place-items: center;
	width: 1.05em;
	height: 1.05em;
	margin: 0 0.08em;
	padding: 0;
	border: 0;
	border-radius: 2px;
	background: var(--sq-dark);
	color: var(--paper);
	font: 400 1em/1 "Apple Symbols", "Segoe UI Symbol", "DejaVu Sans", serif;
	font-size: 1.45em;
	vertical-align: -0.2em;
	cursor: pointer;
	transition: background-color 120ms;
}
@media (hover: hover) { .kn:hover { background: var(--hi); color: var(--ink); } }
.kn:active { transform: translateY(1px); }

/* The knight button again, standing on the 3D board above the piece. */

.board-move {
	position: fixed;
	left: 0;
	top: 0;
	z-index: 2;
	display: flex;
	align-items: center;
	gap: 7px;
	padding: 4px 10px 4px 4px;
	border: 0;
	border-radius: 3px;
	background: var(--paper);
	color: var(--ink);
	font: 650 14px/1 var(--font);
	white-space: nowrap;
	box-shadow: 0 8px 20px -6px rgba(0, 0, 0, 0.5);
	cursor: pointer;
	transition: opacity 160ms, background-color 120ms;
}
.board-move::after {
	content: "";
	position: absolute;
	left: 50%;
	bottom: -5px;
	width: 10px;
	height: 10px;
	margin-left: -5px;
	background: inherit;
	transform: rotate(45deg);
}
.board-move.is-hidden { opacity: 0; pointer-events: none; }
@media (hover: hover) { .board-move:hover { background: var(--hi); } }

.board-move__kn {
	display: grid;
	place-items: center;
	width: 22px;
	height: 22px;
	border-radius: 2px;
	background: var(--sq-dark);
	color: var(--paper);
	font: 400 18px/1 "Apple Symbols", "Segoe UI Symbol", "DejaVu Sans", serif;
}

/* Home navigation */

.moves-nav {
	list-style: none;
	margin: calc(var(--cell) * 0.5) 0 0;
	padding: 0;
}

.moves-nav a {
	display: flex;
	align-items: center;
	gap: 12px;
	padding: 6px 0;
	font-size: 21px;
	font-weight: 600;
	letter-spacing: -0.01em;
	text-decoration: none;
}

.moves-nav a::before {
	content: "";
	flex: none;
	width: 14px;
	height: 14px;
	background: var(--sq-light);
	transition: background-color 120ms;
}

.moves-nav a:hover { background: none; }
.moves-nav a:hover span { background: var(--hi); }
.moves-nav a[aria-current]::before { background: var(--hi); box-shadow: 0 0 0 1px var(--ink); }

.pane__foot {
	margin-top: calc(var(--cell) * 0.6);
	padding-top: 14px;
	border-top: 1px solid var(--rule);
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	gap: 8px 16px;
	font-size: 15px;
}

.elsewhere {
	display: flex;
	flex-wrap: wrap;
	gap: 4px 16px;
	margin: 0;
	padding: 0;
	list-style: none;
}

.place { color: var(--muted); margin: 0; }

/* Drawers */

.drawer__head {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
	margin-bottom: calc(var(--cell) * 0.25);
}

.drawer__head h2 {
	margin: 0;
	font-size: calc(var(--cell) * 0.5);
	line-height: var(--cell);
	font-weight: 700;
	letter-spacing: -0.025em;
}

.close {
	flex: none;
	display: grid;
	place-items: center;
	width: calc(var(--cell) * 0.6);
	height: calc(var(--cell) * 0.6);
	padding: 0;
	border: 0;
	border-radius: 2px;
	background: transparent;
	color: var(--ink);
	cursor: pointer;
}
.close:hover { background: var(--hi); }
.close svg { width: 18px; height: 18px; }

/* The game so far: career as annotated moves */

.game {
	list-style: none;
	margin: 0;
	padding: 0;
	counter-reset: move;
}

.game li {
	counter-increment: move;
	display: grid;
	grid-template-columns: 2em 1fr;
	padding: 7px 0;
	border-top: 1px solid var(--rule);
}

/* Title and year share the first row; the sentence runs underneath. */
.game li > div {
	display: grid;
	grid-template-columns: 1fr auto;
	column-gap: 12px;
}
.game li > div > * { grid-column: 1 / -1; }
.game li > div > h3 { grid-column: 1; grid-row: 1; }

.game li::before {
	content: counter(move) ".";
	font-size: 15px;
	line-height: 1.6;
	color: var(--muted);
	font-variant-numeric: tabular-nums;
	font-weight: 600;
}

.game h3 {
	display: flex;
	align-items: center;
	gap: 10px;
	margin: 0;
	font-size: 17px;
	font-weight: 650;
	letter-spacing: -0.01em;
}

.game p { margin: 0; font-size: 15.5px; line-height: 1.4; }

.game li > div > .game__year {
	grid-column: 2;
	grid-row: 1;
	align-self: center;
	color: var(--muted);
	font-size: 13px;
	font-weight: 600;
	line-height: 1.3;
	letter-spacing: 0.03em;
	font-variant-numeric: tabular-nums;
}

.nag {
	display: inline-grid;
	place-items: center;
	min-width: 1.9em;
	height: 1.5em;
	padding: 0 0.3em;
	border-radius: 3px;
	font-size: 14px;
	font-weight: 800;
	letter-spacing: 0.02em;
	color: #fff;
}
.nag--brilliant { background: var(--nag-brilliant); }
.nag--good { background: var(--nag-good); }
.nag--interesting { background: var(--nag-interesting); color: var(--ink); }
.nag--dubious { background: var(--nag-dubious); color: var(--ink); }
.nag--blunder { background: var(--nag-blunder); }

.key {
	display: flex;
	flex-wrap: wrap;
	gap: 8px 18px;
	margin: 14px 0 0;
	padding-top: 14px;
	border-top: 1px solid var(--rule);
	font-size: 14px;
	color: var(--muted);
}
.key div { display: flex; align-items: center; gap: 7px; }
.key dt, .key dd { margin: 0; }
.key .nag { font-size: 12px; }

/* Writing */

.index {
	list-style: none;
	margin: 0;
	padding: 0;
}

.index a {
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	gap: 16px;
	padding: 11px 0;
	border-top: 1px solid var(--rule);
	text-decoration: none;
}

.index__title { font-weight: 550; }
.index__source { flex: none; color: var(--muted); font-size: 14px; }
.index a:hover .index__source { color: var(--ink); }

/* Toast: the board talks back */

.toast {
	position: fixed;
	left: auto;
	right: var(--cell);
	bottom: calc(var(--cell) * 0.5);
	z-index: 5;
	max-width: calc(100vw - 32px);
	padding: 10px 14px;
	border-radius: 4px;
	background: var(--night);
	color: var(--paper);
	font-size: 15px;
	box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
	transform: translateY(8px);
	opacity: 0;
	pointer-events: none;
	transition: opacity 180ms, transform 180ms;
}
.toast.is-on { opacity: 1; transform: none; }
.toast b { color: var(--hi); font-weight: 800; }

/* A captured move: its story opens on the board, on the same paper as the panes. */

.capture {
	position: fixed;
	left: 0;
	top: 0;
	z-index: 4;
	width: min(360px, calc(100vw - 32px));
	padding: 16px 18px 16px;
	background: var(--paper);
	color: var(--ink);
	border-left: 6px solid var(--hi);
	box-shadow: 0 0 0 1px rgba(20, 34, 25, 0.35), 0 24px 56px -12px rgba(0, 0, 0, 0.7);
	opacity: 0;
	visibility: hidden;
	transition: opacity 220ms, visibility 0s 220ms;
}
.capture.is-on { opacity: 1; visibility: visible; transition: opacity 220ms; animation: capture-in 420ms cubic-bezier(0.2, 1.3, 0.4, 1) both; }
.capture.is-blunder { border-left-color: var(--nag-blunder); }

/* Uses `translate` and `scale`, not clip-path, so the shadow survives and the transform that places the card is left alone. */
@keyframes capture-in {
	from { translate: 0 12px; scale: 0.96; }
	to { translate: 0 0; scale: 1; }
}

.capture__kicker { margin: 0 28px 4px 0; color: var(--muted); font-size: 13px; font-weight: 600; }
.capture__title { display: flex; align-items: center; gap: 10px; margin: 0 0 6px; font-size: 26px; line-height: 1.15; font-weight: 750; letter-spacing: -0.025em; }
.capture__title .nag { font-size: 15px; }
.capture__text { margin: 0; font-size: 16.5px; line-height: 1.45; }
.capture__text a { color: inherit; text-underline-offset: 3px; text-decoration-color: rgba(28, 42, 33, 0.4); }
.capture__text a:hover { background: var(--hi); }

.capture__progress { display: flex; gap: 4px; margin: 14px 0 0; padding: 0; list-style: none; }
.capture__progress li { width: 18px; height: 18px; background: var(--sq-light); opacity: 0.25; }
.capture__progress li.is-taken { opacity: 1; background: var(--sq-dark); }
.capture__progress li.is-now { background: var(--hi); box-shadow: 0 0 0 1px var(--ink); }
.capture__done { margin: 10px 0 0; font-weight: 650; }
.capture__done:empty { display: none; }

.capture__close {
	position: absolute;
	top: 8px;
	right: 8px;
	display: grid;
	place-items: center;
	width: 30px;
	height: 30px;
	padding: 0;
	border: 0;
	border-radius: 2px;
	background: transparent;
	color: var(--ink);
	cursor: pointer;
}
.capture__close:hover { background: var(--hi); }
.capture__close svg { width: 16px; height: 16px; }

/* Moves you've taken on the board light up in the list. */
.game li { transition: background-color 300ms; }
.game li.is-taken { background: linear-gradient(90deg, rgba(240, 201, 74, 0.3), rgba(240, 201, 74, 0) 70%); }

/* Phones: the board is exactly eight files wide, like a real one. */

@media (max-width: 759px) {
	:root { --cols: 8; }

	body { font-size: 16px; }

	.deck {
		flex-direction: column;
		flex-wrap: nowrap;
		/* Five rows of board above the name: room to play the knight. */
		padding: calc(var(--cell) * 5) 0 calc(var(--cell) * 2);
	}

	.pane,
	.pane--drawer { width: 100%; box-shadow: none; }

	.pane__in { padding-left: max(16px, calc(var(--cell) * 0.4)); padding-right: max(16px, calc(var(--cell) * 0.4)); }

	.name { font-size: calc(var(--cell) * 0.86); }
	.moves-nav a { font-size: 19px; }

	.toast { right: 16px; left: 16px; bottom: 16px; }

	/* Docked at the bottom, over the bio: a dark rim keeps it apart from the paper beneath. */
	.capture {
		top: auto; left: 12px; right: 12px; bottom: 12px; width: auto;
		box-shadow: 0 0 0 2px var(--night), 0 0 0 100vmax rgba(20, 34, 25, 0.45), 0 -8px 40px rgba(0, 0, 0, 0.5);
	}
}

@media (prefers-reduced-motion: reduce) {
	.pane--drawer.is-opening { animation: none; }
	.three #board { animation: none; }
	.capture.is-on { animation: none; }
	.toast { transition: none; }
}