/* ============ 设计变量 ============ */
:root {
  --bg: #f4f2ee; --panel: #fff; --ink: #1d1b20; --sub: #6d6975; --faint: #a39fa9;
  --line: #e4dfd8; --line2: #eeeae4; --grid: #d9d3cb;
  --shadow: 0 1px 2px rgba(40, 25, 10, .05), 0 10px 30px -14px rgba(40, 25, 10, .22);
  --shadow2: 0 2px 6px rgba(40, 25, 10, .08), 0 24px 60px -20px rgba(40, 25, 10, .35);
  --accent: #7c5cd6; --good: #1f9d6c; --bad: #e0484d; --warn: #e8932b;
  --r: 18px; --board: min(92vw, 468px);
  color-scheme: light;
}
[data-theme="dark"] {
  --bg: #131216; --panel: #1e1c22; --ink: #efedf2; --sub: #a6a1ae; --faint: #6f6a78;
  --line: #34303b; --line2: #29262e; --grid: #3a3641;
  --shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 10px 30px -14px rgba(0, 0, 0, .7);
  --shadow2: 0 2px 6px rgba(0, 0, 0, .4), 0 24px 60px -20px rgba(0, 0, 0, .85);
  --good: #3cc58d; --bad: #f06a6e;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--ink); min-height: 100vh; min-height: 100dvh;
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased; -webkit-tap-highlight-color: transparent;
}
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; padding: 0; touch-action: manipulation; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 10px; }
svg { display: block; }
.hidden { display: none !important; }

/* ============ 顶栏 ============ */
.top {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 6px;
  padding: 10px max(14px, env(safe-area-inset-right)) 10px max(14px, env(safe-area-inset-left));
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(1.5) blur(14px); -webkit-backdrop-filter: saturate(1.5) blur(14px);
}
.top .brand { font-weight: 760; letter-spacing: .2px; font-size: 16px; display: flex; align-items: center; gap: 8px; margin-right: auto; color: inherit; text-decoration: none; }
.top .brand small { font-weight: 500; color: var(--faint); font-size: 12px; letter-spacing: 1.2px; }
.ib { width: 36px; height: 36px; border-radius: 11px; display: grid; place-items: center; color: var(--sub); transition: background .15s, color .15s; text-decoration: none; }
.ib:hover { background: var(--line2); color: var(--ink); }
.ib svg { width: 20px; height: 20px; }
.home-link { font-size: 13px; color: var(--sub); text-decoration: none; padding: 7px 10px; border-radius: 10px; }
.home-link:hover { background: var(--line2); color: var(--ink); }

/* ============ 大厅 ============ */
.hub { max-width: 760px; margin: 0 auto; padding: 8px 18px 60px; }
.hub-head { padding: 18px 2px 20px; }
.hub-head h1 { margin: 0; font-size: clamp(26px, 5vw, 34px); letter-spacing: -.3px; line-height: 1.2; }
.hub-head p { margin: 6px 0 0; color: var(--sub); }
.hub-head .count { font-variant-numeric: tabular-nums; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.card {
  position: relative; display: flex; flex-direction: column; gap: 14px; text-align: left;
  background: var(--panel); border-radius: var(--r); padding: 18px 18px 16px; box-shadow: var(--shadow);
  text-decoration: none; color: inherit; transition: transform .18s, box-shadow .18s; overflow: hidden;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow2); }
.card::after { content: ""; position: absolute; inset: 0 0 auto; height: 4px; background: var(--c); opacity: .9; }
.card .ic { width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; background: color-mix(in srgb, var(--c) 16%, var(--panel)); color: var(--c); }
.card .ic svg { width: 26px; height: 26px; }
.card h2 { margin: 0; font-size: 19px; letter-spacing: .1px; line-height: 1.25; }
.card h2 small { font-size: 13px; color: var(--sub); font-weight: 500; margin-left: 6px; }
.card .tl { margin: 2px 0 0; color: var(--sub); font-size: 13.5px; }
.card .st { margin-top: auto; display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--sub); font-variant-numeric: tabular-nums; }
.pill { display: inline-flex; align-items: center; gap: 5px; padding: 3px 10px; border-radius: 999px; background: var(--line2); font-size: 12.5px; font-weight: 600; color: var(--sub); white-space: nowrap; }
.pill.done { background: color-mix(in srgb, var(--good) 16%, var(--panel)); color: var(--good); }
.pill.go { background: color-mix(in srgb, var(--warn) 16%, var(--panel)); color: var(--warn); }
.hub-foot { margin-top: 30px; color: var(--faint); font-size: 12.5px; text-align: center; line-height: 1.8; }

/* ============ 游戏页 ============ */
.game { max-width: 560px; margin: 0 auto; padding: 0 16px calc(40px + env(safe-area-inset-bottom)); }
.g-head { display: flex; align-items: center; gap: 12px; padding: 6px 0 14px; }
.g-head .ic { width: 42px; height: 42px; border-radius: 13px; display: grid; place-items: center; background: color-mix(in srgb, var(--accent) 16%, var(--panel)); color: var(--accent); flex: none; }
.g-head .ic svg { width: 24px; height: 24px; }
.g-head h1 { margin: 0; font-size: 22px; line-height: 1.2; letter-spacing: .1px; }
.g-head h1 small { font-size: 13px; color: var(--sub); font-weight: 500; margin-left: 6px; }
.g-head .meta { font-size: 12.5px; color: var(--sub); margin-top: 2px; font-variant-numeric: tabular-nums; }
.g-head .sp { margin-left: auto; display: flex; gap: 2px; }

.tabs { display: flex; gap: 4px; padding: 4px; background: var(--line2); border-radius: 13px; margin-bottom: 12px; }
.tab { flex: 1; padding: 8px 10px; border-radius: 10px; font-size: 14px; font-weight: 600; color: var(--sub); transition: background .15s, color .15s; }
.tab.on { background: var(--panel); color: var(--ink); box-shadow: 0 1px 3px rgba(0, 0, 0, .08); }
.diffs { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin: -2px 0 12px; }
.chip { padding: 5px 13px; border-radius: 999px; font-size: 13px; font-weight: 600; color: var(--sub); background: var(--panel); box-shadow: inset 0 0 0 1px var(--line); }
.chip.on { color: #fff; background: var(--accent); box-shadow: none; }

.status { display: flex; align-items: center; justify-content: space-between; width: var(--board); margin: 0 auto 10px; font-size: 13.5px; color: var(--sub); min-height: 28px; }
.timer { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--ink); font-size: 17px; display: flex; align-items: center; gap: 6px; }
.timer .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--faint); }
.timer.run .dot { background: var(--good); animation: blink 1.6s infinite; }
@keyframes blink { 50% { opacity: .3; } }

.stage { position: relative; min-height: calc(var(--board) + 10px); }
.loading { width: var(--board); aspect-ratio: 1; margin: 0 auto; border-radius: 16px; background: var(--panel); box-shadow: var(--shadow); display: grid; place-items: center; color: var(--sub); font-size: 14px; }
.loading .spin { width: 26px; height: 26px; border-radius: 50%; border: 3px solid var(--line); border-top-color: var(--accent); animation: spin .8s linear infinite; margin: 0 auto 10px; }
@keyframes spin { to { transform: rotate(360deg); } }

.tools { display: flex; justify-content: center; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.tool { display: flex; align-items: center; gap: 7px; padding: 10px 16px; border-radius: 13px; background: var(--panel); box-shadow: var(--shadow); font-size: 14px; font-weight: 600; color: var(--ink); transition: transform .12s, background .15s; }
.tool:active { transform: scale(.97); }
.tool svg { width: 18px; height: 18px; }
.tool.warn { background: color-mix(in srgb, var(--bad) 14%, var(--panel)); color: var(--bad); }
.tool:disabled { opacity: .45; cursor: default; }
.banner { width: var(--board); margin: 0 auto 12px; padding: 11px 14px; border-radius: 14px; background: color-mix(in srgb, var(--good) 13%, var(--panel)); color: var(--good); font-weight: 650; font-size: 14px; display: flex; align-items: center; gap: 10px; }
.banner button { margin-left: auto; padding: 5px 12px; border-radius: 9px; background: var(--good); color: #fff; font-size: 13px; }

/* ============ 棋盘通用 ============ */
.board {
  position: relative; width: var(--board); aspect-ratio: 1; margin: 0 auto; border-radius: 16px;
  touch-action: none; user-select: none; -webkit-user-select: none; -webkit-touch-callout: none;
  outline: none; container-type: inline-size; box-shadow: var(--shadow); background: var(--grid);
}
.board:focus-visible { box-shadow: var(--shadow), 0 0 0 3px color-mix(in srgb, var(--accent) 50%, transparent); }
.board > .grid {
  position: absolute; inset: 0; display: grid; gap: 1px; border-radius: inherit; overflow: hidden; background: var(--grid);
  grid-template-columns: repeat(var(--n), 1fr); grid-template-rows: repeat(var(--n), 1fr);
}
.board > .grid > * { display: grid; place-items: center; position: relative; min-width: 0; min-height: 0; }
.board .cursor { box-shadow: inset 0 0 0 3px var(--accent); z-index: 1; }
.board .flash { animation: flash .5s ease 3; }
@keyframes flash { 50% { filter: brightness(1.25) saturate(1.4); box-shadow: inset 0 0 0 4px var(--warn); } }
.board.won { pointer-events: none; animation: won .6s ease; }
@keyframes won { 40% { transform: scale(1.025); } }
@keyframes shake { 20%, 60% { transform: translate(-50%, -50%) translateX(-5px); } 40%, 80% { transform: translate(-50%, -50%) translateX(5px); } }

/* Queens */
.q-board { background: #2b2733; }
.q-cell { background: var(--c); transition: filter .15s; }
[data-theme="dark"] .q-cell { background: color-mix(in srgb, var(--c) 80%, #17151b); }
.q-lines { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; border-radius: inherit; }
.q-edge { stroke: #2b2733; stroke-width: 3px; fill: none; vector-effect: non-scaling-stroke; stroke-linecap: square; }
[data-theme="dark"] .q-edge { stroke: #0c0b0e; }
.q-outline { display: none; }
.q-queen { width: 64%; color: #1d1b20; display: grid; animation: pop .18s ease; }
[data-theme="dark"] .q-queen { color: #f6f4f8; }
.q-x { width: 34%; color: rgba(30, 25, 35, .5); display: grid; }
[data-theme="dark"] .q-x { color: rgba(255, 255, 255, .5); }
.q-cell.auto::after { content: ""; width: 16%; aspect-ratio: 1; border-radius: 50%; background: rgba(30, 25, 35, .22); }
[data-theme="dark"] .q-cell.auto::after { background: rgba(255, 255, 255, .22); }
.q-cell.bad { background-image: repeating-linear-gradient(-45deg, rgba(224, 72, 77, .32) 0 5px, transparent 5px 11px); }
.q-cell.bad .q-queen { color: var(--bad); }
@keyframes pop { from { transform: scale(.4); opacity: 0; } }

/* Tango */
.t-cell { background: var(--panel); }
.t-cell.locked { background: color-mix(in srgb, var(--ink) 7%, var(--panel)); }
.t-sun, .t-moon { display: grid; animation: pop .18s ease; }
.t-sun { width: 60%; color: #f0a020; }
.t-moon { width: 50%; color: #4274d8; }
[data-theme="dark"] .t-moon { color: #6f9bf0; }
.t-cell.bad { background-image: repeating-linear-gradient(-45deg, rgba(224, 72, 77, .22) 0 5px, transparent 5px 11px); }
.t-sign {
  position: absolute; z-index: 2; transform: translate(-50%, -50%); pointer-events: none;
  width: clamp(18px, 5.4cqw, 26px); aspect-ratio: 1; border-radius: 50%; display: grid; place-items: center;
  background: var(--panel); color: var(--sub); font-weight: 800; font-size: clamp(12px, 3.6cqw, 17px); line-height: 1;
  box-shadow: 0 0 0 1.5px var(--grid);
}
.t-sign.bad { background: var(--bad); color: #fff; box-shadow: none; }

/* Zip */
.z-cell { background: var(--panel); transition: background .08s; }
.z-cell.on { background: color-mix(in srgb, var(--accent) 13%, var(--panel)); }
.z-art { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; overflow: visible; }
.z-path { fill: none; stroke: var(--accent); stroke-width: .38; stroke-linecap: round; stroke-linejoin: round; opacity: .92; }
.z-wall { stroke: var(--ink); stroke-width: .11; stroke-linecap: round; fill: none; }
.z-head { fill: var(--panel); stroke: var(--accent); stroke-width: .1; transition: transform .09s ease-out; }
.z-num {
  position: absolute; z-index: 2; transform: translate(-50%, -50%); pointer-events: none;
  width: calc(100cqw / var(--n) * .6); aspect-ratio: 1; border-radius: 50%; display: grid; place-items: center;
  background: var(--ink); color: var(--panel); font-weight: 780; font-size: calc(100cqw / var(--n) * .3); font-variant-numeric: tabular-nums;
  transition: background .15s, box-shadow .15s;
}
.z-num.done { background: color-mix(in srgb, var(--accent) 80%, #000); }
.z-num.next { box-shadow: 0 0 0 calc(100cqw / var(--n) * .07) color-mix(in srgb, var(--accent) 45%, transparent); }
.z-num.shake { animation: shake .36s; background: var(--bad); }
.z-status { width: var(--board); margin: 10px auto 0; text-align: center; font-size: 13px; color: var(--sub); min-height: 21px; }

/* Patches */
.p-cell { background: var(--panel); }
.p-layer { position: absolute; inset: 0; pointer-events: none; }
.p-patch { position: absolute; }
.p-patch::before {
  content: ""; position: absolute; inset: 2px; border-radius: 9px;
  background: color-mix(in srgb, var(--c) 52%, transparent); box-shadow: inset 0 0 0 2.5px var(--c);
}
.p-patch.bad::before { background: repeating-linear-gradient(-45deg, color-mix(in srgb, var(--c) 30%, transparent) 0 5px, transparent 5px 11px); box-shadow: inset 0 0 0 2px var(--bad); }
.p-patch.flash::before { animation: flash .5s ease 3; }
.p-clue { position: absolute; z-index: 2; width: calc(100% / var(--n)); height: calc(100% / var(--n)); display: grid; place-items: center; pointer-events: none; }
.p-tag {
  display: flex; align-items: center; gap: .28em; padding: .18em .42em; border-radius: .5em; min-width: 1.9em; justify-content: center;
  background: var(--c); color: #1d1b20; font-weight: 820; font-size: calc(100cqw / var(--n) * .27); line-height: 1.15;
  box-shadow: 0 1px 2px rgba(0, 0, 0, .15);
}
.p-clue.ok .p-tag { box-shadow: 0 0 0 2px var(--panel), 0 0 0 3.5px var(--c); }
.p-g { display: inline-block; border: .14em solid currentColor; border-radius: .12em; vertical-align: middle; }
.p-g.sq { width: .74em; height: .74em; }
.p-g.tall { width: .5em; height: .95em; }
.p-g.wide { width: 1em; height: .52em; }
.p-preview { position: absolute; z-index: 3; pointer-events: none; border-radius: 10px; border: 2.5px dashed var(--ink); background: color-mix(in srgb, var(--ink) 6%, transparent); }
.p-preview.ok { border-color: var(--good); background: color-mix(in srgb, var(--good) 14%, transparent); }
.p-size { position: absolute; left: 50%; bottom: calc(100% + 6px); transform: translateX(-50%); background: var(--ink); color: var(--panel); font-size: 12px; font-weight: 700; padding: 1px 8px; border-radius: 7px; white-space: nowrap; }

/* Mini Sudoku */
.s-lines { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; overflow: visible; }
.s-lines path, .s-lines rect { fill: none; stroke: var(--ink); stroke-width: 2.5px; vector-effect: non-scaling-stroke; }
.s-lines rect { stroke-width: 3px; }
.s-cell { background: var(--panel); color: var(--accent); font-size: calc(100cqw / 6 * .46); font-weight: 600; }
.s-cell.locked { color: var(--ink); font-weight: 760; }
.s-cell.peer { background: color-mix(in srgb, var(--accent) 7%, var(--panel)); }
.s-cell.same { background: color-mix(in srgb, var(--accent) 18%, var(--panel)); }
.s-cell.sel { background: color-mix(in srgb, var(--accent) 28%, var(--panel)); }
.s-cell.bad .s-num { color: var(--bad); }
.s-num { animation: pop .15s ease; }
.s-notes { display: grid; grid-template-columns: repeat(3, 1fr); width: 88%; height: 72%; font-size: calc(100cqw / 6 * .19); color: var(--sub); font-weight: 600; }
.s-notes i { font-style: normal; display: grid; place-items: center; }
.s-pad { display: grid; grid-template-columns: repeat(8, 1fr); gap: 7px; width: var(--board); margin: 14px auto 0; }
.pad-key { height: 50px; border-radius: 13px; background: var(--panel); box-shadow: var(--shadow); font-size: 21px; font-weight: 680; display: grid; place-items: center; }
.pad-key svg { width: 20px; height: 20px; }
.pad-key.done { opacity: .35; }
.pad-key.pad-note { font-size: 10.5px; gap: 1px; font-weight: 600; }
.pad-note.on { background: var(--accent); color: #fff; }
@media (max-width: 400px) { .s-pad { gap: 5px; } .pad-key { height: 46px; font-size: 19px; } }

/* ============ 弹窗 / 提示条 ============ */
.mask { position: fixed; inset: 0; z-index: 50; background: rgba(20, 15, 25, .42); backdrop-filter: blur(3px); display: grid; place-items: center; padding: 18px; animation: fade .18s ease; }
@keyframes fade { from { opacity: 0; } }
.dlg { width: min(430px, 100%); max-height: 88vh; overflow: auto; background: var(--panel); border-radius: 22px; box-shadow: var(--shadow2); padding: 22px 22px 18px; animation: rise .22s ease; }
@keyframes rise { from { transform: translateY(14px) scale(.98); opacity: 0; } }
.dlg h3 { margin: 0 0 10px; font-size: 19px; display: flex; align-items: center; gap: 10px; }
.dlg h3 .ic { width: 34px; height: 34px; border-radius: 11px; display: grid; place-items: center; background: color-mix(in srgb, var(--accent) 16%, var(--panel)); color: var(--accent); }
.dlg h3 .ic svg { width: 20px; height: 20px; }
.dlg ul { margin: 0; padding-left: 20px; }
.dlg li { margin: 6px 0; }
.dlg .tip { margin: 12px 0 0; padding: 10px 12px; border-radius: 12px; background: var(--line2); color: var(--sub); font-size: 13.5px; }
.dlg .row { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-top: 1px solid var(--line2); font-size: 14px; }
.dlg .row:first-of-type { margin-top: 14px; }
.sw { margin-left: auto; width: 44px; height: 26px; border-radius: 99px; background: var(--line); position: relative; transition: background .18s; flex: none; }
.sw::after { content: ""; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0, 0, 0, .25); transition: transform .18s; }
.sw.on { background: var(--accent); }
.sw.on::after { transform: translateX(18px); }
.dlg .acts { display: flex; gap: 8px; margin-top: 18px; }
.btn { flex: 1; padding: 12px 14px; border-radius: 13px; font-weight: 700; font-size: 15px; background: var(--line2); color: var(--ink); }
.btn.pri { background: var(--accent); color: #fff; }

.win { text-align: center; }
.win .check { width: 64px; height: 64px; margin: 4px auto 12px; border-radius: 50%; background: var(--good); color: #fff; display: grid; place-items: center; animation: pop .35s cubic-bezier(.3, 1.6, .5, 1); }
.win .check svg { width: 34px; height: 34px; }
.win h3 { justify-content: center; font-size: 24px; margin-bottom: 2px; }
.win .sub { color: var(--sub); font-size: 13.5px; }
.nums { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 18px 0 6px; }
.nums div { background: var(--line2); border-radius: 14px; padding: 10px 6px; }
.nums b { display: block; font-size: 20px; font-variant-numeric: tabular-nums; }
.nums span { font-size: 12px; color: var(--sub); }
.nums .rec b { color: var(--good); }
.streak { margin-top: 10px; font-size: 14px; color: var(--sub); }
.streak b { color: var(--warn); }

.toast {
  position: fixed; left: 50%; bottom: calc(26px + env(safe-area-inset-bottom)); transform: translate(-50%, 16px); z-index: 60;
  max-width: calc(100vw - 32px); background: var(--ink); color: var(--panel); padding: 10px 16px; border-radius: 14px;
  font-size: 14px; box-shadow: var(--shadow2); opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; text-align: center;
}
.toast.on { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 420px) {
  .g-head h1 { font-size: 20px; }
  .tools { gap: 6px; }
  .tool { padding: 9px 11px; font-size: 13.5px; gap: 5px; }
  .tool svg { width: 16px; height: 16px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }