:root {
  color-scheme: dark;
  --bg: #0e0a19;
  --card: #18122a;
  --card-hi: #231a3b;
  --line: rgba(255, 255, 255, 0.09);
  --text: #f5f0fa;
  --muted: #b2a8c2;
  --gold: #f4b93a;
  --x: #ff5d6c;
  --o: #3fd3e6;
  --font: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
  --vh: 100vh;
}
/* the height that is really visible on a phone, without the browser's bars */
@supports (height: 100dvh) {
  :root { --vh: 100dvh; }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: var(--vh);
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.4;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}
button { margin: 0; font: inherit; color: inherit; -webkit-appearance: none; appearance: none; touch-action: manipulation; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }

/* the same soft light as on the list of games */
.glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(60vw 50vh at 12% -10%, rgba(244, 185, 58, 0.14), transparent 70%),
    radial-gradient(50vw 50vh at 95% 5%, rgba(138, 92, 246, 0.2), transparent 70%),
    radial-gradient(70vw 60vh at 50% 110%, rgba(63, 211, 230, 0.1), transparent 70%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48'%3E%3Cpath d='M24 14l6 10-6 10-6-10z' fill='none' stroke='%23ffffff' stroke-opacity='.035' stroke-width='1.5'/%3E%3C/svg%3E");
}

/* ---------- top bar: 52 px tall, the board's size is counted from it ---------- */
.top {
  flex: none;
  width: 100%;
  max-width: 1180px;
  height: 52px;
  margin: var(--safe-t) auto 0;
  padding: 8px max(16px, var(--safe-r)) 0 max(16px, var(--safe-l));
  display: flex;
  align-items: center;
  gap: 8px;
}
.home, .back {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 40px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 800;
  text-decoration: none;
  transition: background 0.2s;
}
.home { padding: 0 14px 0 8px; margin-left: -8px; }
.home .mark { width: 24px; height: 24px; }
.back { padding: 0 16px 0 8px; margin-left: -8px; gap: 4px; border: 0; background: none; cursor: pointer; }
.back svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.home:hover, .back:hover { background: rgba(255, 255, 255, 0.07); }

.tools { margin-left: auto; min-width: 0; display: flex; align-items: center; gap: 8px; }
.tag {
  min-width: 0;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.icon {
  flex: none;
  width: 40px;
  height: 40px;
  padding: 0;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.icon:hover { background: rgba(255, 255, 255, 0.12); }
.icon svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.icon .spk { fill: currentColor; stroke-width: 1.2; }
.icon .mute { display: none; }
.icon[aria-pressed="false"] { color: var(--muted); }
.icon[aria-pressed="false"] .wave { display: none; }
.icon[aria-pressed="false"] .mute { display: inline; }

.langs { flex: none; display: flex; gap: 4px; padding: 4px; border-radius: 999px; background: rgba(255, 255, 255, 0.06); border: 1px solid var(--line); }
.langs button {
  font-size: 13px;
  font-weight: 800;
  padding: 6px 12px;
  border: 0;
  border-radius: 999px;
  background: none;
  color: var(--muted);
  cursor: pointer;
}
.langs button[aria-pressed="true"] { background: var(--gold); color: #1d1405; }

main { flex: 1; min-height: 0; display: flex; flex-direction: column; justify-content: center; }
.view { animation: view-in 0.35s cubic-bezier(0.2, 0.8, 0.2, 1) both; }
@keyframes view-in { from { opacity: 0; transform: translateY(10px); } }

/* ---------- the marks: one set of rules for the board, the menu picture and the small icons ---------- */
.m { fill: none; stroke-width: 11; stroke-linecap: round; stroke-linejoin: round; }
.m.x { stroke: var(--x); }
.m.o { stroke: var(--o); }
.m path {
  /* a dash as long as the path; shifted a hair past its start, so no round cap shows before the drawing begins */
  stroke-dasharray: 1 2;
  stroke-dashoffset: 1.02;
  animation: draw 0.24s ease-out var(--d, 0s) forwards;
}
.m.x path + path { animation-delay: calc(var(--d, 0s) + 0.13s); }
.m.o path { animation-duration: 0.36s; }
@keyframes draw { to { stroke-dashoffset: 0; } }
/* icons are not drawn stroke by stroke */
.m.mini path, .m.still path { animation: none; stroke-dasharray: none; stroke-dashoffset: 0; }
.m.mini { stroke-width: 15; }

/* ---------- menu ---------- */
.menu {
  width: 100%;
  max-width: 552px;
  margin: 0 auto;
  padding: 4px max(16px, var(--safe-r)) 8px max(16px, var(--safe-l));
  display: flex;
  flex-direction: column;
  align-items: center;
}
.intro { display: flex; flex-direction: column; align-items: center; text-align: center; }
.art {
  --a: clamp(96px, var(--vh) - 470px, 180px);
  width: var(--a);
  height: var(--a);
  margin-bottom: 4px;
}
.art svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
  transform: perspective(520px) rotateX(22deg) rotateZ(-7deg);
  filter: drop-shadow(0 18px 20px rgba(0, 0, 0, 0.5));
  animation: float 6s ease-in-out 1.6s infinite;
}
@keyframes float {
  50% { transform: perspective(520px) rotateX(22deg) rotateZ(-7deg) translateY(-6px); }
}
.tiles rect { fill: #221939; stroke: rgba(255, 255, 255, 0.12); stroke-width: 1.5; }
.win {
  fill: none;
  stroke: #ffd25a;
  stroke-width: 9;
  stroke-linecap: round;
  stroke-dasharray: 1 2;
  stroke-dashoffset: 1.02;
  animation: draw 0.45s ease-out var(--d, 0s) forwards;
}

h1 {
  margin: 10px 0 6px;
  font-size: clamp(30px, 8.6vw, 46px);
  line-height: 1.05;
  letter-spacing: -0.035em;
  font-weight: 900;
}
.lead { margin: 0 0 18px; max-width: 430px; color: var(--muted); font-size: clamp(15px, 2.1vw, 17px); text-wrap: balance; }

.modes { width: 100%; display: grid; gap: 12px; }
.mode {
  width: 100%;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--card-hi), var(--card));
  box-shadow: 0 18px 40px -26px rgba(0, 0, 0, 0.8);
}
.mode.duo { --accent: var(--gold); cursor: pointer; transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1), border-color 0.25s, box-shadow 0.25s; }
.mode.bot { --accent: #a78bfa; flex-direction: column; align-items: stretch; gap: 12px; }
.mode.duo:hover {
  transform: translateY(-3px);
  border-color: rgba(244, 185, 58, 0.55);
  box-shadow: 0 22px 44px -24px rgba(244, 185, 58, 0.45);
}
.mode.duo:active { transform: scale(0.985); }
.mode-head { display: flex; align-items: center; gap: 14px; }
.mode-ico {
  flex: none;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.07);
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  color: var(--accent);
}
.mode-ico svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.mode-ico .dot { fill: currentColor; stroke: none; }
.mode-text { min-width: 0; }
.mode-text b { display: block; font-size: 20px; line-height: 1.2; font-weight: 900; letter-spacing: -0.015em; }
.mode-text small { display: block; margin-top: 2px; color: var(--muted); font-size: 13.5px; line-height: 1.3; text-wrap: balance; }
.go {
  flex: none;
  margin-left: auto;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: #1d1405;
  transition: transform 0.2s;
}
.go svg { width: 22px; height: 22px; fill: currentColor; }
.mode.duo:hover .go { transform: translateX(3px); }

.levels { display: flex; gap: 8px; }
.level {
  flex: 1 1 auto;
  min-width: 0;
  padding: 10px 8px 11px;
  display: grid;
  justify-items: center;
  gap: 6px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.2, 1), border-color 0.2s, background 0.2s;
}
.level:hover {
  transform: translateY(-2px);
  border-color: var(--c);
  background: rgba(255, 255, 255, 0.09);
  background: color-mix(in srgb, var(--c) 14%, transparent);
}
.level:active { transform: scale(0.97); }
.dots { display: flex; gap: 4px; }
.dots i { width: 7px; height: 7px; border-radius: 50%; background: rgba(255, 255, 255, 0.16); }
.dots i.on { background: var(--c); box-shadow: 0 0 8px var(--c); }

.foot { flex: none; text-align: center; color: var(--muted); font-size: 13px; padding: 8px 16px calc(14px + var(--safe-b)); }
.foot a { color: var(--text); text-decoration-color: rgba(255, 255, 255, 0.3); text-underline-offset: 3px; }
.noscript { text-align: center; color: var(--muted); padding: 24px; }

/* ---------- game ----------
   Everything except the board has a fixed height, so the board takes exactly what is left:
   52 top bar + 10 + 64 score + 14 + board + 12 + 28 status + 10 + 46 buttons + 12 = board + 248 */
.game {
  --n: max(150px, min(100vw - 32px, var(--vh) - 248px - var(--safe-t) - var(--safe-b), 500px));
  /* the score and the buttons are never narrower than a comfortable row, even when the board is small */
  --w: max(var(--n), min(100vw - 32px, 340px));
  display: grid;
  justify-content: center;
  justify-items: center;
  grid-template-columns: var(--w);
  grid-template-areas: "score" "board" "status" "actions";
  padding: 0 16px calc(12px + var(--safe-b));
}

.score {
  grid-area: score;
  width: var(--w);
  height: 64px;
  margin-top: 10px;
  display: grid;
  grid-template-columns: 1fr 0.72fr 1fr;
  gap: 8px;
}
.side, .draws {
  min-width: 0;
  padding: 0 8px;
  display: grid;
  grid-template-rows: 20px 28px;
  row-gap: 2px;
  align-content: center;
  justify-items: center;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--card-hi), var(--card));
  transition: border-color 0.25s, box-shadow 0.25s;
}
.side.x { --c: var(--x); }
.side.o { --c: var(--o); }
.who {
  max-width: 100%;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 20px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
}
.who span { overflow: hidden; text-overflow: ellipsis; }
.who .m { flex: none; width: 15px; height: 15px; }
.num { font-size: 26px; line-height: 28px; font-weight: 900; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.side .num { color: var(--c); }
.side.active { border-color: var(--c); box-shadow: 0 0 0 1px var(--c), 0 12px 26px -16px var(--c); }
.side.active .who { color: var(--text); }
.num.bump { animation: bump 0.45s cubic-bezier(0.2, 1.6, 0.4, 1); }
@keyframes bump { 35% { transform: scale(1.45); } }

.board {
  grid-area: board;
  position: relative;
  width: var(--n);
  height: var(--n);
  margin-top: 14px;
  display: grid;
  grid-template: repeat(3, 1fr) / repeat(3, 1fr);
  /* a share of the board, so the line through the winning cells can be placed in percent */
  gap: calc(var(--n) * 0.032);
  user-select: none;
  -webkit-user-select: none;
}
.board[data-over="x"] { --c: var(--x); }
.board[data-over="o"] { --c: var(--o); }
.cell {
  position: relative;
  min-width: 0;
  min-height: 0;
  padding: 0;
  border-radius: calc(var(--n) * 0.055);
  border: 1px solid var(--line);
  background-color: var(--card);
  background-image: linear-gradient(180deg, var(--card-hi), var(--card));
  background-repeat: no-repeat;
  background-position: center;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 12px 24px -16px rgba(0, 0, 0, 0.9);
  cursor: default;
  transition: transform 0.12s, border-color 0.2s, opacity 0.3s;
}
.cell .m {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  transition: opacity 0.3s;
}
.cell .m.x { filter: drop-shadow(0 0 calc(var(--n) * 0.022) rgba(255, 93, 108, 0.5)); }
.cell .m.o { filter: drop-shadow(0 0 calc(var(--n) * 0.022) rgba(63, 211, 230, 0.5)); }

/* a cell that can be played: the pointer, a press, and on a computer a faint mark under the mouse */
.board[data-go] .cell:empty { cursor: pointer; }
.board[data-go] .cell:empty:active { transform: scale(0.95); }
@media (hover: hover) and (pointer: fine) {
  .board[data-go] .cell:empty:hover { border-color: rgba(255, 255, 255, 0.24); }
  .board[data-go="x"] .cell:empty:hover {
    background-image:
      url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath d='M26 26L74 74M74 26L26 74' fill='none' stroke='%23ff5d6c' stroke-opacity='.3' stroke-width='11' stroke-linecap='round'/%3E%3C/svg%3E"),
      linear-gradient(180deg, var(--card-hi), var(--card));
  }
  .board[data-go="o"] .cell:empty:hover {
    background-image:
      url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Ccircle cx='50' cy='50' r='24.5' fill='none' stroke='%233fd3e6' stroke-opacity='.3' stroke-width='11'/%3E%3C/svg%3E"),
      linear-gradient(180deg, var(--card-hi), var(--card));
  }
}

/* the round is over: a tap anywhere on the board starts the next one */
.board[data-over] .cell { cursor: pointer; }
.board[data-over="x"] .cell:not(.win) .m,
.board[data-over="o"] .cell:not(.win) .m { opacity: 0.32; }
.board[data-over="draw"] .cell .m { opacity: 0.6; }
.cell.win {
  border-color: var(--c);
  background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.05));
  background-image: linear-gradient(180deg, color-mix(in srgb, var(--c) 30%, var(--card-hi)), color-mix(in srgb, var(--c) 14%, var(--card)));
  animation: win-pop 0.5s cubic-bezier(0.2, 1.5, 0.4, 1) 0.1s;
}
@keyframes win-pop { 40% { transform: scale(1.06); } }

/* the glow is on the whole picture: Safari does not put filters on the parts of an SVG */
.strike {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
  filter: drop-shadow(0 0 6px rgba(255, 200, 70, 0.9));
}
.strike path {
  fill: none;
  stroke: #ffe08a;
  stroke-width: 2.6;
  stroke-linecap: round;
  stroke-dasharray: 1 2;
  stroke-dashoffset: 1.02;
  animation: draw 0.4s ease-out 0.12s forwards;
}

.status {
  grid-area: status;
  max-width: var(--w);
  height: 28px;
  margin: 12px 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 18px;
  line-height: 28px;
  font-weight: 800;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.status .m { flex: none; width: 19px; height: 19px; stroke-width: 15; }
.status.done { animation: status-pop 0.4s cubic-bezier(0.2, 1.5, 0.4, 1); }
.status.done[data-tone="x"] { color: var(--x); }
.status.done[data-tone="o"] { color: var(--o); }
.status.done[data-tone="draw"] { color: var(--gold); }
@keyframes status-pop { from { transform: scale(0.8); opacity: 0; } }
/* three dots that fill one after another while the bot is thinking */
.status .wait { display: inline-flex; gap: 4px; margin-left: 2px; }
.status .wait i { width: 5px; height: 5px; border-radius: 50%; background: currentColor; opacity: 0.25; animation: wait 0.9s infinite; }
.status .wait i:nth-child(2) { animation-delay: 0.15s; }
.status .wait i:nth-child(3) { animation-delay: 0.3s; }
@keyframes wait { 30% { opacity: 1; } 60% { opacity: 0.25; } }

.actions { grid-area: actions; width: var(--w); height: 46px; margin-top: 10px; display: flex; gap: 8px; }
.btn {
  flex: 1 1 0;
  min-width: 0;
  height: 46px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.07);
  font-size: 15px;
  font-weight: 800;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, transform 0.12s, opacity 0.2s;
}
.btn:hover { background: rgba(255, 255, 255, 0.13); }
.btn:active { transform: scale(0.97); }
.btn.primary { border-color: transparent; background: var(--gold); color: #1d1405; font-weight: 900; }
.btn.primary:hover { background: #ffc94f; }
.btn.ghost { flex: 0 0 auto; background: none; color: var(--muted); }
.btn.ghost:hover { background: rgba(255, 255, 255, 0.07); color: var(--text); }
.btn:disabled { opacity: 0.4; cursor: default; }
.btn:disabled:hover { background: rgba(255, 255, 255, 0.07); }
.btn.ghost:disabled:hover { background: none; color: var(--muted); }
.btn:disabled:active { transform: none; }

.confetti { position: fixed; inset: 0; z-index: 5; width: 100%; height: 100%; pointer-events: none; }

/* ---------- a phone on its side: the board on the left, everything else beside it ---------- */
@media (orientation: landscape) and (max-height: 540px) {
  .game {
    /* 52 top bar + board + 16 */
    --n: max(150px, min(var(--vh) - 68px - var(--safe-t) - var(--safe-b), 48vw));
    --w: min(340px, 100vw - var(--n) - 56px - var(--safe-l) - var(--safe-r));
    grid-template-columns: var(--n) var(--w);
    grid-template-rows: 1fr auto auto auto 1fr;
    grid-template-areas: "board ." "board score" "board status" "board actions" "board .";
    column-gap: 24px;
    padding: 0 max(16px, var(--safe-r)) calc(8px + var(--safe-b)) max(16px, var(--safe-l));
  }
  .score, .board { margin-top: 0; }

  .menu { max-width: 800px; flex-direction: row; align-items: center; gap: 28px; padding-top: 0; }
  .intro { flex: 0 0 40%; min-width: 0; align-items: flex-start; text-align: left; }
  .modes { flex: 1; min-width: 0; gap: 10px; }
  .art { --a: clamp(60px, var(--vh) - 240px, 120px); }
  h1 { font-size: clamp(20px, 3.7vw, 34px); white-space: nowrap; }
  .lead { margin-bottom: 0; font-size: 15px; }
  .mode { padding: 10px 14px; }
  .mode.bot { gap: 10px; }
  .foot { padding-top: 4px; padding-bottom: calc(8px + var(--safe-b)); }
}

/* a small phone on its side: the names of the modes say enough */
@media (orientation: landscape) and (max-height: 540px) and (max-width: 600px) {
  .mode-text small { display: none; }
}

/* three equal buttons when the card is wide enough for the longest name */
.modes { container-type: inline-size; }
@container (min-width: 420px) {
  .level { flex: 1 1 0; }
}

/* small phones: a tighter menu, no picture when there is no room for it */
@media (max-width: 380px) {
  .level { font-size: 13px; padding-left: 6px; padding-right: 6px; }
  .mode { padding: 12px 14px; gap: 12px; }
  .mode-head { gap: 12px; }
  .mode-text small { font-size: 13px; }
  .btn { font-size: 14px; padding: 0 10px; }
}
@media (orientation: portrait) and (max-height: 560px) {
  .art { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .view, .art svg, .num.bump, .cell.win, .status.done, .status .wait i { animation: none; }
  .m path, .win, .strike path { animation: none; stroke-dashoffset: 0; }
  .cell, .mode.duo, .level, .btn, .go { transition: none; }
}