*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--x: #ff4d6d;--o: #4cc9f0;--gold: #ffd60a;--bg: #0d0d1a;--surf: #131326;--sub: #1a1a35;--cell: #0f2a4a;--border: #252540;--text: #e2e8f0;--muted: #5a6a80;--radius: 8px}body{background:var(--bg);color:var(--text);font-family:Segoe UI,system-ui,sans-serif;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}.gradient-text{background:linear-gradient(100deg,var(--x) 0%,#c06ef0 50%,var(--o) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.tx-x{color:var(--x);font-weight:700}.tx-o{color:var(--o);font-weight:700}.btn-primary{padding:11px 32px;background:linear-gradient(135deg,var(--x),#c03050);color:#fff;border:none;border-radius:40px;font-size:.9rem;font-weight:700;cursor:pointer;letter-spacing:.3px;box-shadow:0 6px 20px #ff4d6d4d;transition:opacity .18s,transform .1s}.btn-primary:hover:not(:disabled){opacity:.88;transform:translateY(-2px)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-primary:disabled{opacity:.4;cursor:not-allowed}.btn-back{background:none;border:1px solid var(--border);color:var(--muted);padding:6px 14px;border-radius:20px;font-size:.85rem;cursor:pointer;transition:color .15s,border-color .15s}.btn-back:hover{color:var(--text);border-color:var(--text)}.btn-copy{padding:6px 14px;background:var(--surf);border:1px solid var(--border);border-radius:6px;color:var(--text);font-size:.85rem;cursor:pointer;transition:background .15s}.btn-copy:hover{background:var(--border)}.alert{padding:10px 16px;border-radius:var(--radius);font-size:.875rem}.alert--error{background:#ff4d6d26;border:1px solid var(--x);color:var(--x)}.alert--warning{background:#ffd60a1a;border:1px solid var(--gold);color:var(--gold)}.badge{width:28px;height:28px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-weight:900;font-size:.85rem;flex-shrink:0}.badge--x{color:var(--x);background:#ff4d6d26;border:2px solid var(--x)}.badge--o{color:var(--o);background:#4cc9f026;border:2px solid var(--o)}.status{background:var(--surf);border:1px solid var(--border);border-radius:50px;padding:10px 22px;font-size:.9rem;display:flex;align-items:center;gap:10px;min-height:50px;justify-content:center;min-width:260px;transition:border-color .25s,box-shadow .25s;text-align:center}.status--win-x{border-color:var(--x);box-shadow:0 0 14px #ff4d6d40}.status--win-o{border-color:var(--o);box-shadow:0 0 14px #4cc9f040}.status--thinking{border-color:var(--gold)}.scoreboard{display:flex;gap:12px}.score{background:var(--surf);border:1px solid var(--border);border-radius:10px;padding:8px 18px;text-align:center;min-width:80px;display:flex;flex-direction:column;gap:2px}.score__label{font-size:.7rem;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}.score__value{font-size:1.6rem;font-weight:900;line-height:1.2}.score--x .score__value{color:var(--x)}.score--o .score__value{color:var(--o)}.score--draw .score__value{color:var(--muted)}.game-view{display:flex;flex-direction:column;align-items:center;gap:18px;width:100%;max-width:540px}.game-view__header{display:flex;align-items:center;gap:12px;align-self:flex-start}.game-view__label{font-size:.85rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.5px}.game-view__controls{display:flex;gap:12px}.board{display:grid;grid-template:repeat(3,auto) / repeat(3,auto);gap:8px;background:var(--border);padding:8px;border-radius:14px;box-shadow:0 24px 64px #0009}.board--over .subboard:not(.subboard--won-x):not(.subboard--won-o):not(.subboard--draw){opacity:.45}.subboard{display:grid;grid-template:repeat(3,44px) / repeat(3,44px);gap:3px;padding:5px;background:var(--sub);border-radius:8px;border:3px solid transparent;position:relative;transition:border-color .2s,box-shadow .2s,background .2s}.subboard__num{position:absolute;top:-13px;right:0;font-size:.58rem;color:var(--muted);font-weight:700;pointer-events:none;-webkit-user-select:none;user-select:none}@keyframes pulse-glow{0%,to{box-shadow:0 0 14px #ffd60a4d}50%{box-shadow:0 0 28px #ffd60aa6}}.subboard--required{border-color:var(--gold);animation:pulse-glow 1.4s ease-in-out infinite}.subboard--any{border-color:#ffd60a47}.subboard--won-x{background:#ff4d6d1a}.subboard--won-o{background:#4cc9f01a}.subboard--draw{background:#28283c66}.subboard__overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;border-radius:6px;pointer-events:none}.subboard__overlay--x{background:#ff4d6d38}.subboard__overlay--o{background:#4cc9f038}.subboard__overlay--draw{background:#00000080}@keyframes zoom-in{0%{transform:scale(.15) rotate(-15deg);opacity:0}to{transform:scale(1) rotate(0);opacity:1}}.subboard__sym{font-size:68px;font-weight:900;line-height:1;animation:zoom-in .28s cubic-bezier(.34,1.56,.64,1)}.subboard__sym--x{color:var(--x);text-shadow:0 0 20px rgba(255,77,109,.7)}.subboard__sym--o{color:var(--o);text-shadow:0 0 20px rgba(76,201,240,.7)}.subboard__sym--draw{color:#3a3a5a;font-size:14px;font-weight:700;letter-spacing:2px}.cell{background:var(--cell);border:none;border-radius:5px;cursor:pointer;font-size:1.25rem;font-weight:900;color:transparent;transition:background .12s,transform .1s;display:flex;align-items:center;justify-content:center}.cell--x{color:var(--x);animation:cell-pop .2s ease-out}.cell--o{color:var(--o);animation:cell-pop .2s ease-out}@keyframes cell-pop{0%{transform:scale(.35);opacity:.2}65%{transform:scale(1.18)}to{transform:scale(1);opacity:1}}.cell:not(:disabled):hover{background:#1c3d6e;transform:scale(1.06)}.cell:disabled{cursor:default}.mode-selector{display:flex;flex-direction:column;align-items:center;gap:32px;width:100%;max-width:600px}.mode-selector__hero{text-align:center}.mode-selector__title{font-size:clamp(1.8rem,5vw,2.6rem);font-weight:900;letter-spacing:-.5px}.mode-selector__subtitle{font-size:.8rem;color:var(--muted);margin-top:6px;letter-spacing:.5px;text-transform:uppercase}.mode-selector__cards{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;width:100%}.mode-card{flex:1;min-width:140px;max-width:180px;background:var(--surf);border:1px solid var(--border);border-radius:14px;padding:24px 16px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:8px;transition:border-color .2s,transform .15s,box-shadow .2s;color:var(--text)}.mode-card:hover{transform:translateY(-4px);box-shadow:0 12px 30px #0006}.mode-card--solo:hover{border-color:var(--x)}.mode-card--local:hover{border-color:var(--o)}.mode-card--online:hover{border-color:var(--gold)}.mode-card__icon{font-size:.8rem;font-weight:800;padding:6px 12px;border-radius:20px;background:var(--border);letter-spacing:.5px}.mode-card--solo .mode-card__icon{color:var(--x)}.mode-card--local .mode-card__icon{color:var(--o)}.mode-card--online .mode-card__icon{color:var(--gold)}.mode-card__title{font-size:1.1rem;font-weight:800}.mode-card__desc{font-size:.75rem;color:var(--muted);text-align:center;line-height:1.4}.mode-selector__legend{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;font-size:.73rem;color:var(--muted)}.legend-item{display:flex;align-items:center;gap:5px}.legend-dot{width:10px;height:10px;border-radius:2px;border:2px solid}.legend-dot--gold{border-color:var(--gold);background:#ffd60a33}.legend-dot--x{border-color:var(--x);background:#ff4d6d33}.legend-dot--o{border-color:var(--o);background:#4cc9f033}.lobby{display:flex;flex-direction:column;align-items:center;gap:20px;width:100%;max-width:480px}.lobby__title{font-size:1.4rem;font-weight:800}.lobby__text{color:var(--muted);font-size:.9rem;text-align:center}.lobby__name{display:flex;flex-direction:column;gap:6px;width:100%}.lobby__name label{font-size:.8rem;color:var(--muted)}input[type=text]{width:100%;padding:10px 14px;background:var(--surf);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:.95rem;outline:none;transition:border-color .15s}input[type=text]:focus{border-color:var(--o)}.lobby__options{display:flex;gap:16px;width:100%;align-items:flex-start;flex-wrap:wrap}.lobby__option{flex:1;min-width:160px;display:flex;flex-direction:column;gap:10px;background:var(--surf);border:1px solid var(--border);border-radius:12px;padding:20px}.lobby__option h3{font-size:1rem;font-weight:700}.lobby__option p{font-size:.8rem;color:var(--muted)}.lobby__divider{align-self:center;color:var(--muted);font-size:.85rem;font-weight:600;padding:4px}.lobby__code-box{display:flex;align-items:center;gap:12px;background:var(--surf);border:1px solid var(--border);border-radius:10px;padding:14px 20px}.lobby__code{font-size:2rem;font-weight:900;letter-spacing:6px;color:var(--gold)}.lobby__waiting{font-size:.85rem;color:var(--muted);animation:blink-text 1.6s ease-in-out infinite}@keyframes blink-text{0%,to{opacity:1}50%{opacity:.4}}.lobby__spinner{width:28px;height:28px;border:3px solid var(--border);border-top-color:var(--gold);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 440px){.subboard{grid-template:repeat(3,36px) / repeat(3,36px)}.cell{font-size:1rem}.subboard__sym{font-size:52px}.board{gap:6px;padding:6px}.scoreboard{gap:8px}.score{min-width:66px;padding:6px 10px}}