:root{--bg:#f5f3ef;--surface:#fff;--text:#1f2937;--text-muted:#6b7280;--border:#d9d5cc;--accent:#1f2937;--accent-contrast:#fff;--mark-x:#dc2626;--mark-o:#2563eb;--danger:#b91c1c;--danger-contrast:#fff;--paper:#fefefe;--paper-line:#a9c2e8;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root{--bg:#15171c;--surface:#1f232b;--text:#e5e7eb;--text-muted:#9ca3af;--border:#343a45;--accent:#e5e7eb;--accent-contrast:#15171c;--mark-x:#f87171;--mark-o:#60a5fa;--danger:#ef4444;--danger-contrast:#15171c;--paper:#1b1e24;--paper-line:#39506e;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:Segoe UI,system-ui,-apple-system,sans-serif}.app{width:100%;max-width:640px;margin:0 auto;padding:12px 16px 40px}.app-header{letter-spacing:.02em;justify-content:space-between;align-items:center;padding:10px 4px 18px;font-size:1.2rem;font-weight:700;display:flex}.app-header-actions,.app-brand{align-items:center;gap:8px;display:flex}.app-logo{object-fit:contain;width:28px;height:28px;display:block}.screen{animation:.2s fade-in}@keyframes fade-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.hint{color:var(--text-muted);max-width:480px;font-size:.92rem;line-height:1.5}.copyright{color:var(--text-muted);margin-top:18px;font-size:.75rem}.setup-screen{text-align:center;flex-direction:column;align-items:center;max-width:460px;margin:0 auto;display:flex}.game-title{text-align:center;letter-spacing:.04em;flex-direction:column;align-items:center;gap:2px;margin:6px 0 14px;font-size:1.6rem;font-weight:800;display:flex}.title-logo{object-fit:contain;width:56px;height:56px;margin-bottom:4px}.game-title .title-native{color:var(--accent);letter-spacing:.06em;font-size:1.3rem;font-weight:700}.game-title .title-translit{color:var(--text-muted);letter-spacing:.04em;font-size:.95rem;font-style:italic;font-weight:500}.setup-form{background:var(--surface);border:1px solid var(--border);text-align:left;border-radius:16px;flex-direction:column;gap:16px;width:100%;max-width:420px;margin-top:14px;padding:22px;display:flex}.setup-form label{color:var(--text-muted);flex-direction:column;gap:6px;font-size:.9rem;display:flex}.setup-form input[type=text]{border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:8px;padding:10px 12px;font-size:1rem}.setup-form fieldset{border:1px solid var(--border);border-radius:10px;flex-direction:column;gap:8px;padding:12px 14px;display:flex}.setup-form legend{color:var(--text-muted);padding:0 6px}.radio-row{align-items:center;color:var(--text)!important;flex-direction:row!important;gap:8px!important}.difficulty-row{align-items:flex-start!important}.difficulty-row input{margin-top:3px}.difficulty-row span{flex-direction:column;gap:2px;display:flex}.difficulty-row small{color:var(--text-muted);font-size:.78rem;font-weight:400;line-height:1.4}.size-presets{flex-wrap:wrap;gap:8px;display:flex}.size-chip{border:1.5px solid var(--border);background:var(--bg);color:var(--text);cursor:pointer;border-radius:999px;padding:7px 12px;font-size:.9rem;font-weight:600}.size-chip.active{border-color:var(--accent);color:var(--accent);background:color-mix(in srgb, var(--accent) 12%, var(--bg))}.field-error{color:var(--danger);margin:4px 0 0;font-size:.85rem}.btn-primary,.btn-secondary,.btn-danger,.btn-link{cursor:pointer;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:8px;padding:10px 16px;font-family:inherit;font-size:.95rem;transition:background .15s,transform 50ms}.btn-primary{background:var(--accent);color:var(--accent-contrast);border-color:var(--accent)}.btn-danger{background:var(--danger);color:var(--danger-contrast);border-color:var(--danger)}.btn-link{color:var(--text-muted);background:0 0;border:none;padding:4px;text-decoration:underline}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-primary:active,.btn-secondary:active{transform:scale(.97)}.size-input{border:1px solid var(--border);background:var(--surface);color:var(--text);text-align:center;border-radius:8px;padding:10px 12px;font-family:inherit;font-size:.95rem;width:90px!important}.game-screen{flex-direction:column;align-items:center;gap:16px;width:100%;display:flex}.turn-indicator{margin:0;font-weight:600}.online-vs{color:var(--text-muted);margin:0;font-size:.9rem}.board{aspect-ratio:1;background:var(--paper);border:1px solid var(--paper-line);width:100%;max-width:480px;display:grid}.board-cell{background:var(--paper);border:none;border-right:1px solid var(--paper-line);border-bottom:1px solid var(--paper-line);cursor:pointer;border-radius:0;justify-content:center;align-items:center;width:100%;min-width:0;height:100%;min-height:0;padding:0;font-family:Segoe UI,system-ui,sans-serif;font-weight:700;line-height:1;display:flex}.board-cell:not(:disabled):hover{background:color-mix(in srgb, var(--paper) 85%, var(--paper-line))}.board-size-classic .board-cell{font-size:2.5rem}.board-size-large .board-cell{font-size:clamp(.5rem,2.2vw,1.1rem)}.board-cell:disabled{cursor:default}.board-cell.mark-x{color:var(--mark-x)}.board-cell.mark-o{color:var(--mark-o)}.gameover-banner{text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:12px;flex-direction:column;gap:12px;width:100%;padding:16px;display:flex}.gameover-text{margin:0;font-size:1.2rem;font-weight:700}.gameover-actions{justify-content:center;gap:8px;display:flex}.lobby-screen{justify-content:center;padding-top:40px;display:flex}.pass-card{background:var(--surface);border:1px solid var(--border);text-align:center;border-radius:18px;width:100%;max-width:420px;padding:40px 32px}.pass-card h2{margin:0}.pass-name{color:var(--accent);margin:8px 0 14px;font-size:1.4rem;font-weight:800}.pass-name small{color:var(--text-muted);margin-top:2px;font-size:.85rem;font-weight:500;display:block}.lobby-list{text-align:left;flex-direction:column;gap:8px;margin:14px 0;display:flex}.lobby-entry{justify-content:flex-start;align-items:baseline;gap:6px;width:100%;display:flex}.lobby-entry small{color:var(--text-muted)}.lobby-entry:disabled{opacity:.6;cursor:not-allowed}.dialog-overlay{z-index:50;background:#00000080;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.dialog-box{background:var(--surface);border:1px solid var(--border);border-radius:12px;flex-direction:column;gap:12px;width:100%;max-width:400px;padding:20px;display:flex}.dialog-title,.dialog-message{margin:0}.dialog-input{border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:8px;padding:10px 12px;font-family:inherit;font-size:.95rem}.dialog-actions{justify-content:flex-end;gap:8px;display:flex}@media (width<=480px){.app-header h1{font-size:1.5rem}.board-size-large .board-cell{font-size:.75rem}}