*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
[hidden] { display: none !important; }

:root {
  --bg: #f4f1ea;
  --surface: #fffdf8;
  --ink: #23201c;
  --ink-soft: #6f685e;
  --line: #e2dccf;
  --nono: #c45d3e;
  --nono-fill: #5b7ab8;
  --sudo: #4f6bed;
  --mine: #b07a1f;
  --sea: #2a7f9e;
  --sea-water: #e3edf0;
  --sea-ship: #5d6b78;
  --c4: #c2334d;
  --c4-frame: #2f5ec4;
  --c4-red: #d8443a;
  --c4-yellow: #f2b630;
  --sol: #3f8a5a;
  --sol-felt: #e3ece3;
  --sol-red: #c4453e;
  --ttt: #2f5ec4;
  --ttt-x: #d8443a;
  --ttt-o: #2f5ec4;
  --pit: #2fbf71;
  --shadow: 0 1px 2px rgba(40, 30, 10, 0.06), 0 8px 28px rgba(40, 30, 10, 0.08);
  --radius: 14px;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #151410;
    --surface: #1f1d18;
    --ink: #ece6da;
    --ink-soft: #9a9283;
    --line: #34302a;
    --nono: #d4694a;
    --nono-fill: #6c8cd0;
    --sudo: #7088ff;
    --mine: #d9a441;
    --sea: #3f9fc0;
    --sea-water: #1d2a30;
    --sea-ship: #7d8a96;
    --c4: #e05a72;
    --c4-frame: #2a4d9a;
    --c4-red: #e0554a;
    --c4-yellow: #f0bb3e;
    --sol: #5fb07c;
    --sol-felt: #1c2a21;
    --sol-red: #d0564c;
  --ttt: #5a85e0;
  --ttt-x: #e0554a;
  --ttt-o: #5a85e0;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 28px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #151410;
  --surface: #1f1d18;
  --ink: #ece6da;
  --ink-soft: #9a9283;
  --line: #34302a;
  --nono: #d4694a;
  --nono-fill: #6c8cd0;
  --sudo: #7088ff;
  --mine: #d9a441;
  --sea: #3f9fc0;
  --sea-water: #1d2a30;
  --sea-ship: #7d8a96;
  --c4: #e05a72;
  --c4-frame: #2a4d9a;
  --c4-red: #e0554a;
  --c4-yellow: #f0bb3e;
  --sol: #5fb07c;
  --sol-felt: #1c2a21;
  --sol-red: #d0564c;
  --ttt: #5a85e0;
  --ttt-x: #e0554a;
  --ttt-o: #5a85e0;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 28px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

html { background: var(--bg); }
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  background: var(--bg);
  color: var(--ink);
  min-height: 100dvh;
  padding: env(safe-area-inset-top, 0) max(16px, env(safe-area-inset-right, 0)) env(safe-area-inset-bottom, 0) max(16px, env(safe-area-inset-left, 0));
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }

/* ── Header ── */
.site-header {
  max-width: 1160px;
  margin: 0 auto;
  padding-block: 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.wordmark {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.wordmark span { color: var(--nono); }
.site-header nav { display: flex; gap: 6px; flex-wrap: wrap; }
.site-header nav a {
  text-decoration: none;
  font-size: 0.92rem;
  color: var(--ink-soft);
  padding: 6px 12px;
  border-radius: 999px;
  transition: background 0.15s, color 0.15s;
}
.site-header nav a:hover { background: var(--surface); color: var(--ink); }

main { max-width: 1160px; margin: 0 auto; }

/* ── Intro ── */
.intro { padding-block: clamp(24px, 6vw, 64px) clamp(20px, 4vw, 40px); max-width: 680px; }
.intro h1 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  font-weight: 700;
}
.intro p { margin-top: 18px; font-size: 1.08rem; color: var(--ink-soft); max-width: 54ch; }

/* ── Game cards ── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
}
.card {
  --accent: var(--nono);
  display: flex;
  gap: 22px;
  align-items: center;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-decoration: none;
  transition: transform 0.18s ease, border-color 0.18s;
}
.card-sudoku { --accent: var(--sudo); }
.card-battleships { --accent: var(--sea); }
.card-minesweeper { --accent: var(--mine); }
.card-connect-four { --accent: var(--c4); }
.card-tic-tac-toe { --accent: var(--ttt); }
.card-solitaire { --accent: var(--sol); }
.card:hover { transform: translateY(-3px); border-color: var(--accent); }
.card:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.card h2 { font-family: var(--serif); font-size: 1.55rem; line-height: 1.1; letter-spacing: -0.01em; }
.card p { margin-top: 6px; color: var(--ink-soft); font-size: 0.95rem; }
.card .go {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--accent);
}
.card .go b { display: inline-block; transition: transform 0.18s; }
.card:hover .go b { transform: translateX(4px); }

.thumb {
  flex: none;
  width: 104px;
  height: 104px;
  display: grid;
  border-radius: 8px;
  overflow: hidden;
}
.thumb.nono {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  grid-template-rows: repeat(5, minmax(0, 1fr));
  gap: 3px;
  padding: 8px;
  background: color-mix(in srgb, var(--nono) 12%, var(--surface));
}
.thumb.nono span { background: var(--surface); border-radius: 2px; }
.thumb.nono span.f { background: var(--nono-fill); }
.card:hover .thumb.nono span.f { animation: pop 0.35s ease both; }
.card:hover .thumb.nono span:nth-child(3n).f { animation-delay: 60ms; }
.card:hover .thumb.nono span:nth-child(3n+1).f { animation-delay: 120ms; }
@keyframes pop { 50% { transform: scale(0.7); } }

.thumb.sudo {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-template-rows: repeat(3, minmax(0, 1fr));
  gap: 2px;
  padding: 2px;
  background: var(--ink);
}
.thumb.sudo span {
  display: grid;
  place-items: center;
  background: var(--surface);
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 600;
}
.thumb.sudo span.u { color: var(--sudo); }

.thumb.sea {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  grid-template-rows: repeat(5, minmax(0, 1fr));
  gap: 3px;
  padding: 8px;
  background: color-mix(in srgb, var(--sea) 22%, var(--surface));
}
.thumb.sea span { position: relative; display: grid; place-items: center; background: var(--sea-water); border-radius: 2px; }
.thumb.sea span.m::after { content: ""; width: 30%; height: 30%; border-radius: 50%; background: var(--ink-soft); }
.thumb.sea span.s { background: var(--sea-ship); border-radius: 0; }
.thumb.sea span.s.h { margin: 2px -2px; }
.thumb.sea span.s.v { margin: -2px 2px; }
.thumb.sea span.hl { border-radius: 999px 0 0 999px; margin-left: 1px; }
.thumb.sea span.hr { border-radius: 0 999px 999px 0; margin-right: 1px; }
.thumb.sea span.vt { border-radius: 999px 999px 0 0; margin-top: 1px; }
.thumb.sea span.vb { border-radius: 0 0 999px 999px; margin-bottom: 1px; }
.thumb.sea span.hit { background: var(--nono); }
.thumb.sea span.hit::after { content: "×"; color: #fff; font-family: var(--sans); font-weight: 700; font-size: 1rem; line-height: 1; }
.card:hover .thumb.sea span.hit { animation: pop 0.35s ease both; }
.card:hover .thumb.sea span.hit + .hit { animation-delay: 80ms; }

.thumb.mine {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  grid-template-rows: repeat(5, minmax(0, 1fr));
  gap: 2px;
  padding: 6px;
  background: color-mix(in srgb, var(--mine) 18%, var(--surface));
}
.thumb.mine span {
  display: grid;
  place-items: center;
  border-radius: 2px;
  background: color-mix(in srgb, var(--mine) 30%, var(--surface));
  box-shadow: inset 1.5px 1.5px 0 color-mix(in srgb, #fff 35%, transparent), inset -1.5px -1.5px 0 color-mix(in srgb, #000 15%, transparent);
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 700;
}
.thumb.mine span.o { background: var(--surface); box-shadow: none; }
.thumb.mine span.n1 { color: var(--sudo); }
.thumb.mine span.f::after { content: "\2691"; color: var(--nono); font-size: 0.9rem; }
.card:hover .thumb.mine span.f::after { animation: pop 0.35s ease both; display: inline-block; }

.thumb.c4 {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  grid-template-rows: repeat(5, minmax(0, 1fr));
  gap: 4px;
  padding: 8px;
  background: var(--c4-frame);
}
.thumb.c4 span { position: relative; display: grid; place-items: center; border-radius: 50%; background: var(--bg); }
.thumb.c4 span.r { background: var(--c4-red); }
.thumb.c4 span.y { background: var(--c4-yellow); }
.thumb.c4 span.w::after { content: ""; width: 46%; height: 46%; border-radius: 50%; border: 1.5px solid rgba(255, 255, 255, 0.85); }
.card:hover .thumb.c4 span.drop { animation: c4drop 0.45s cubic-bezier(0.55, 0, 1, 0.45) both; }
@keyframes c4drop { from { transform: translateY(-260%); } }

.thumb.ttt {
  position: relative;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-template-rows: repeat(3, minmax(0, 1fr));
  gap: 3px;
  padding: 8px;
  background: color-mix(in srgb, var(--ttt) 22%, var(--surface));
}
.thumb.ttt span { position: relative; background: var(--surface); border-radius: 2px; }
.thumb.ttt span.x::before, .thumb.ttt span.x::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 5px;
  height: 64%;
  top: 18%;
  margin-left: -2.5px;
  border-radius: 2px;
  background: var(--ttt-x);
  transform: rotate(45deg);
}
.thumb.ttt span.x::after { transform: rotate(-45deg); }
.thumb.ttt span.o::before { content: ""; position: absolute; inset: 20%; border-radius: 50%; border: 4.5px solid var(--ttt-o); }
.thumb.ttt svg { position: absolute; inset: 8px; width: calc(100% - 16px); height: calc(100% - 16px); }
.thumb.ttt line { stroke: var(--ttt-x); stroke-width: 0.1; stroke-linecap: round; stroke-dasharray: 1; }
.card:hover .thumb.ttt span.last { animation: pop 0.35s ease both; }
.card:hover .thumb.ttt line { animation: tttstrike 0.4s 0.2s ease-out both; }
@keyframes tttstrike { from { stroke-dashoffset: 1; } }

.thumb.sol { display: block; position: relative; background: var(--sol-felt); }
.thumb.sol span {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 46%;
  height: 64%;
  margin: -30% 0 0 -23%;
  padding: 5% 7%;
  background: #fffdf8;
  border: 1px solid rgba(40, 30, 10, 0.18);
  border-radius: 5px;
  box-shadow: 0 1px 3px rgba(40, 30, 10, 0.18);
  font-family: var(--serif);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1;
  color: #23201c;
  transform-origin: 50% 100%;
  transition: transform 0.3s cubic-bezier(.2, .8, .3, 1.2);
}
.thumb.sol span i { font-style: normal; font-size: 0.85em; margin-left: 1px; }
.thumb.sol span.red { color: var(--sol-red); }
.thumb.sol span.back {
  background:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.22) 0 2px, transparent 2px 6px),
    repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.22) 0 2px, transparent 2px 6px),
    var(--nono);
  border: 2px solid #fffdf8;
}
.thumb.sol span:nth-child(1) { transform: translateX(-30%) rotate(-16deg); }
.thumb.sol span:nth-child(2) { transform: rotate(0deg); }
.thumb.sol span:nth-child(3) { transform: translateX(30%) rotate(16deg); }
.card:hover .thumb.sol span:nth-child(1) { transform: translateX(-38%) rotate(-24deg); }
.card:hover .thumb.sol span:nth-child(2) { transform: translateY(-6%); }
.card:hover .thumb.sol span:nth-child(3) { transform: translateX(38%) rotate(24deg); }

/* ── Snake pit ── */
.pit { padding-block: clamp(40px, 7vw, 72px) 16px; }
.pit-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.pit-head h2 { font-family: var(--serif); font-size: clamp(1.7rem, 4vw, 2.3rem); letter-spacing: -0.015em; line-height: 1.1; }
.pit-head p { color: var(--ink-soft); margin-top: 6px; max-width: 60ch; }
.online {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink-soft);
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}
.online i { width: 8px; height: 8px; border-radius: 50%; background: var(--pit); box-shadow: 0 0 0 0 var(--pit); animation: live 2s infinite; }
@keyframes live { 70% { box-shadow: 0 0 0 7px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }

.arena {
  position: relative;
  height: clamp(420px, 72vh, 780px);
  border-radius: var(--radius);
  overflow: hidden;
  background: #0d1016;
  box-shadow: var(--shadow);
  color: #e8ecf4;
  font-family: var(--sans);
  user-select: none;
  -webkit-user-select: none;
}
.arena:fullscreen { height: 100%; border-radius: 0; }
.arena canvas#view { display: block; width: 100%; height: 100%; touch-action: none; cursor: crosshair; }

.hud-lb {
  position: absolute;
  top: 12px;
  right: 12px;
  min-width: 170px;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(10, 13, 20, 0.55);
  backdrop-filter: blur(6px);
  font-size: 0.8rem;
  pointer-events: none;
}
.hud-lb h3 { font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; color: #8b93a7; margin-bottom: 4px; }
.hud-lb ol { list-style: none; counter-reset: lb; }
.hud-lb li { counter-increment: lb; display: flex; gap: 8px; line-height: 1.6; }
.hud-lb li::before { content: counter(lb); width: 1.2em; text-align: right; color: #6c7488; font-family: var(--mono); }
.hud-lb li span { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 120px; }
.hud-lb li b { font-family: var(--mono); font-weight: 500; color: #b8c0d4; }
.hud-lb li.me { color: #7dffb0; }
.hud-lb li.me b { color: #7dffb0; }

.hud-stats {
  position: absolute;
  left: 14px;
  bottom: 12px;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: #c9d0e0;
  pointer-events: none;
  text-shadow: 0 1px 3px #000;
}
.hud-stats b { color: #fff; font-size: 1.1rem; }

.mini {
  position: absolute;
  right: 12px;
  bottom: 12px;
  width: 96px;
  height: 96px;
  pointer-events: none;
  opacity: 0.9;
}

.fs {
  position: absolute;
  top: 12px;
  left: 12px;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 9px;
  background: rgba(10, 13, 20, 0.55);
  color: #c9d0e0;
  cursor: pointer;
}
.fs:hover { color: #fff; }

.menu {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(380px, calc(100% - 32px));
  padding: 24px;
  border-radius: 16px;
  background: rgba(14, 18, 27, 0.82);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.menu h3 { font-family: var(--serif); font-size: 1.6rem; color: #fff; }
.menu p { color: #a6aec2; font-size: 0.92rem; margin-top: 4px; }
.menu .join { display: flex; gap: 8px; margin-top: 18px; }
.menu input {
  flex: 1;
  min-width: 0;
  padding: 11px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  font: inherit;
  font-size: 1rem;
}
.menu input:focus { outline: 2px solid var(--pit); outline-offset: 1px; }
.menu button {
  padding: 11px 22px;
  border: 0;
  border-radius: 10px;
  background: var(--pit);
  color: #062312;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.menu button:hover { filter: brightness(1.1); }
.menu button:disabled { opacity: 0.5; cursor: wait; }
.menu .help { font-size: 0.78rem; color: #7d859a; margin-top: 14px; }
.menu kbd {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 1px 5px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.status {
  position: absolute;
  left: 50%;
  top: 14px;
  transform: translateX(-50%);
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(10, 13, 20, 0.7);
  font-size: 0.82rem;
  color: #c9d0e0;
}

/* ── Footer ── */
.site-footer {
  max-width: 1160px;
  margin: 0 auto;
  padding-block: 28px 36px;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

@media (max-width: 560px) {
  .card { padding: 16px; gap: 16px; }
  .thumb { width: 80px; height: 80px; }
  .thumb.sudo span { font-size: 0.95rem; }
  .hud-lb { min-width: 0; font-size: 0.72rem; padding: 8px 10px; }
  .hud-lb li:nth-child(n+6) { display: none; }
  .mini { width: 72px; height: 72px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}