:root {
	--bg: #10211a;
	--panel: #172f25;
	--panel-2: #1e3b2f;
	--line: #2c5645;
	--ink: #e8f0ea;
	--muted: #9ab5a8;
	--accent: #d8b45a;
	--good: #62b87a;
	--bad: #d97a6c;
	--tile-w: 42px;
	--tile-h: 56px;
}
* { box-sizing: border-box; }
body {
	margin: 0; background: var(--bg); color: var(--ink);
	font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
	-webkit-text-size-adjust: 100%;
}
a { color: var(--accent); }
header { padding: 22px 18px 0; max-width: 1080px; margin: 0 auto; }
h1 { margin: 0; font-size: 26px; font-weight: 500; letter-spacing: .5px; }
h1 b { color: var(--accent); font-weight: 700; }
h2 { margin: 0 0 6px; font-size: 20px; }
h3 { margin: 22px 0 8px; font-size: 16px; color: var(--accent); }
.sub { color: var(--muted); margin: 6px 0 16px; max-width: 62ch; }
.muted { color: var(--muted); }
.hidden { display: none !important; }

nav#tabs { display: flex; gap: 6px; flex-wrap: wrap; border-bottom: 1px solid var(--line); }
nav#tabs button {
	background: none; border: 0; border-bottom: 2px solid transparent;
	color: var(--muted); padding: 9px 14px; font-size: 15px; cursor: pointer;
}
nav#tabs button.on { color: var(--ink); border-bottom-color: var(--accent); }
nav#tabs button:hover { color: var(--ink); }

main { max-width: 1080px; margin: 0 auto; padding: 20px 18px 60px; }
.tab { display: none; }
.tab.on { display: block; }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; }
button {
	background: var(--accent); color: #22190a; border: 0; border-radius: 7px;
	padding: 9px 16px; font-size: 15px; font-weight: 600; cursor: pointer;
}
button:hover { filter: brightness(1.08); }
button:disabled { opacity: .45; cursor: default; filter: none; }
button.ghost { background: none; color: var(--muted); border: 1px solid var(--line); font-weight: 500; }
button.ghost:hover { color: var(--ink); }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-top: 14px; }
label { display: block; margin: 12px 0; color: var(--muted); font-size: 14px; }
label.check { display: flex; align-items: center; gap: 8px; }
select { display: block; width: 100%; max-width: 420px; margin-top: 5px; padding: 8px;
	background: var(--panel-2); color: var(--ink); border: 1px solid var(--line); border-radius: 6px; font-size: 15px; }

/* --- tiles --- */
.tile {
	display: inline-block; width: var(--tile-w); height: var(--tile-h);
	background-repeat: no-repeat; background-position: center; background-size: contain;
	border-radius: 4px; vertical-align: bottom; flex: none;
	position: relative; transition: transform .1s;
}
.tile.small { --tile-w: 28px; --tile-h: 37px; }
.tile.pick { cursor: pointer; }
.tile.pick:hover { transform: translateY(-7px); }
.tile.sel { transform: translateY(-10px); box-shadow: 0 0 0 2px var(--accent); }
.tile.right { transform: translateY(-10px); box-shadow: 0 0 0 2px var(--good); }
.tile.wrong { box-shadow: 0 0 0 2px var(--bad); }
.tile.dim { opacity: .45; }
.tile .glyph {
	position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
	font-size: calc(var(--tile-h) * .48); color: #1d6b3f; font-weight: 700;
}
.hand { display: flex; flex-wrap: wrap; gap: 4px; margin: 14px 0; min-height: var(--tile-h); }
.hand .gap { width: 14px; }
.melds, .bonus { display: flex; gap: 12px; flex-wrap: wrap; margin: 8px 0; }
.meld { display: flex; gap: 2px; }
.meld.concealed .tile { filter: brightness(.82); }
.caption { color: var(--muted); font-size: 13px; margin-top: -6px; }

/* --- learn --- */
.lesson-layout { display: grid; grid-template-columns: 230px 1fr; gap: 20px; align-items: start; }
.lesson-list { list-style: none; margin: 0; padding: 0; }
.lesson-list li {
	padding: 8px 12px; border-radius: 7px; cursor: pointer; color: var(--muted);
	font-size: 14px; display: flex; gap: 8px; align-items: center;
}
.lesson-list li:hover { background: var(--panel); color: var(--ink); }
.lesson-list li.on { background: var(--panel-2); color: var(--ink); }
.lesson-list li .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--line); flex: none; }
.lesson-list li.done .dot { background: var(--good); }
#lesson-body p { max-width: 68ch; }
.quiz { margin-top: 20px; border-top: 1px solid var(--line); padding-top: 16px; }
.choices { display: flex; flex-direction: column; gap: 8px; margin: 14px 0; max-width: 560px; }
.choices button { background: var(--panel-2); color: var(--ink); text-align: left; font-weight: 500; border: 1px solid var(--line); }
.choices button.on { border-color: var(--accent); }
.choices button.right { border-color: var(--good); background: #1c3d2a; }
.choices button.wrong { border-color: var(--bad); background: #3d2320; }
.feedback { margin-top: 14px; padding: 12px 14px; border-radius: 8px; background: var(--panel-2); border-left: 3px solid var(--accent); }
.feedback.ok { border-left-color: var(--good); }
.feedback.no { border-left-color: var(--bad); }

/* --- drills --- */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }
.grid .card { cursor: pointer; }
.grid .card:hover { border-color: var(--accent); }
.drill-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; }
.drill-stats { display: flex; gap: 10px; align-items: center; color: var(--muted); font-size: 14px; white-space: nowrap; }

/* --- table --- */
.opponents { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.opp { background: var(--panel); border: 1px solid var(--line); border-radius: 9px; padding: 10px 12px; }
.opp h4 { margin: 0 0 6px; font-size: 14px; font-weight: 600; display: flex; justify-content: space-between; }
.opp .tag { color: var(--muted); font-weight: 400; }
.opp.turn { border-color: var(--accent); }
.opp .row-tiles { display: flex; gap: 2px; flex-wrap: wrap; }
.pond-wrap { display: flex; gap: 16px; align-items: flex-start; margin: 16px 0; }
.pond { flex: 1; display: flex; flex-wrap: wrap; gap: 3px; min-height: 40px;
	background: var(--panel); border: 1px solid var(--line); border-radius: 9px; padding: 10px; }
.pond .last { box-shadow: 0 0 0 2px var(--accent); border-radius: 4px; }
.wall-info { color: var(--muted); font-size: 13px; text-align: right; min-width: 88px; }
.you { margin-top: 8px; }
.seat-label { color: var(--muted); font-size: 14px; }
.hint { background: var(--panel-2); border: 1px solid var(--line); border-left: 3px solid var(--accent);
	border-radius: 8px; padding: 10px 14px; font-size: 14px; margin: 10px 0; }
.actions { margin-bottom: 10px; }
.log { color: var(--muted); font-size: 13px; max-height: 130px; overflow-y: auto;
	border-top: 1px solid var(--line); padding-top: 8px; }
.log div { padding: 1px 0; }

/* --- faan table --- */
table { border-collapse: collapse; width: 100%; font-size: 14px; }
td, th { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--accent); font-weight: 600; }
td.n { text-align: right; width: 90px; white-space: nowrap; }
.points { display: flex; flex-wrap: wrap; gap: 8px; }
.points span { background: var(--panel-2); border: 1px solid var(--line); border-radius: 6px; padding: 5px 10px; font-size: 14px; }

footer { max-width: 1080px; margin: 0 auto; padding: 0 18px 30px; color: var(--muted);
	font-size: 13px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

@media (max-width: 760px) {
	:root { --tile-w: 34px; --tile-h: 45px; }
	.lesson-layout { grid-template-columns: 1fr; }
	.lesson-list { display: flex; overflow-x: auto; gap: 4px; }
	.lesson-list li { white-space: nowrap; }
	.opponents { grid-template-columns: 1fr; }
	.pond-wrap { flex-direction: column; }
	.wall-info { text-align: left; }
}