.setup { margin-bottom: 14px; }
.ttt-layout { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(260px, 1fr); gap: 16px; align-items: start; }
@media (max-width: 820px) { .ttt-layout { grid-template-columns: 1fr; } }
.hud { display: flex; justify-content: space-around; text-align: center; margin-bottom: 14px; }
.hud .k { display: block; font-size: .75rem; letter-spacing: .14em; text-transform: uppercase; color: var(--brand-deep); font-weight: 600; }
.hud .v { font-family: Chango, Georgia, serif; font-size: 1.6rem; font-variant-numeric: tabular-nums; }
.b3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; width: min(100%, 360px); margin: 0 auto; }
.sq { aspect-ratio: 1; border: 0; border-radius: 16px; background: #f1fbf1; border: 2px solid var(--line); cursor: pointer;
  font-family: Chango, Georgia, serif; font-size: clamp(2.4rem, 12vw, 4rem); color: var(--ink); display: grid; place-items: center; transition: background .1s, transform .05s; }
.sq:hover:not(:disabled) { background: rgba(25,193,85,.16); border-color: var(--brand); }
.sq:active:not(:disabled) { transform: scale(.97); }
.sq:disabled { cursor: default; }
.sq.x { color: var(--brand-deep); }
.sq.o { color: var(--ink); }
.sq.win { background: var(--brand); color: #fff; border-color: var(--brand-deep); }
.sq:focus-visible { outline: 3px solid var(--brand); outline-offset: 2px; }
.status-line { text-align: center; font-weight: 600; font-size: 1.15rem; margin: 16px 0 4px; min-height: 1.5em; }
.quip { text-align: center; margin: 0 0 8px; min-height: 1.5em; color: var(--brand-deep); font-style: italic; }
.tools { justify-content: center; }
.tools .btn { flex: 0 1 auto; }