:root{--navy: #1A202C;--gold: #C5A572;--cream: #FDFBF7;--sage: var(--cream);--accent: var(--gold);--text-main: var(--navy);--text-muted: #718096;--game-bg: #FFFFFF;--border-subtle: #E2E8F0;--font-serif: "Playfair Display", serif;--font-sans: "Lato", sans-serif;--shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--radius-lg: .5rem;--radius-md: .375rem}body.game-page{background-color:var(--sage)}.game-loading-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--cream);display:flex;flex-direction:column;justify-content:center;align-items:center;z-index:9999;transition:opacity .3s ease-out}.game-loading-overlay.hidden{opacity:0;pointer-events:none}.game-loading-overlay img{width:80px;height:80px;animation:pulse-logo 1.5s ease-in-out infinite}.game-loading-overlay .loading-text{margin-top:1rem;font-family:var(--font-serif);color:var(--text-muted);font-size:.875rem;letter-spacing:.1em}@keyframes pulse-logo{0%,to{opacity:.6;transform:scale(.95)}50%{opacity:1;transform:scale(1)}}.game-content-area{font-family:var(--font-sans);color:var(--text-main)}h1.game-title{font-family:var(--font-serif);color:var(--text-main);font-weight:500;margin:0;font-size:1.75rem}@media (min-width: 640px){h1.game-title{font-size:2.5rem}}h2.game-heading,.game-serif{font-family:var(--font-serif);color:var(--text-main);font-weight:500}.container-max{max-width:900px;margin:0 auto;padding:0 1rem}@media (min-width: 640px){.container-max{padding:0 1.5rem}}.game-layout-center{display:flex;flex-direction:column;align-items:center;gap:1rem;padding-top:1.5rem;padding-bottom:2rem}@media (min-width: 640px){.game-layout-center{gap:2rem;padding-top:3rem;padding-bottom:3rem}}.game-canvas-wrapper{display:flex;justify-content:center;align-items:center;padding:1rem;box-sizing:border-box}.game-canvas{display:block;width:100%;max-width:min(400px,calc(100vw - 2rem));height:auto;aspect-ratio:1 / 1;border-radius:var(--radius-md);touch-action:none}.game-canvas--square{aspect-ratio:1 / 1}.game-canvas--tall{aspect-ratio:1 / 2;max-width:200px}.calm-panel{background:var(--white);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft);border:1px solid white;padding:1.5rem}@media (min-width: 640px){.calm-panel{padding:2rem}}.btn-primary{background:var(--gold);color:var(--navy);padding:.75rem 2rem;border-radius:9999px;font-size:.875rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;border:none;cursor:pointer;transition:transform .2s,background .2s,filter .2s;box-shadow:0 4px 6px -1px #c5a57266}.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.1)}.btn-action{background:#f0fff4;color:#276749;border:1px solid #48BB78;padding:.5rem 1.25rem;border-radius:9999px;font-size:.875rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;cursor:pointer;display:inline-flex;align-items:center;gap:.5rem;transition:all .2s}.btn-action:hover{background:#c6f6d5;transform:translateY(-1px)}.btn-danger{background:#fff5f5;color:#c53030;border:1px solid #F56565;padding:.5rem 1.25rem;border-radius:9999px;font-size:.875rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;cursor:pointer;display:inline-flex;align-items:center;gap:.5rem;transition:all .2s}.btn-danger:hover{background:#fed7d7;transform:translateY(-1px)}.btn-warning{background:#fffaf0;color:#c05621;border:1px solid #ED8936;padding:.5rem 1.25rem;border-radius:9999px;font-size:.875rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;cursor:pointer;display:inline-flex;align-items:center;gap:.5rem;transition:all .2s}.btn-warning:hover{background:#feebc8;transform:translateY(-1px)}.btn-secondary{background:#faf5ff;color:#6b46c1;border:1px solid #9F7AEA;padding:.5rem 1.25rem;border-radius:9999px;font-size:.875rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;cursor:pointer;display:inline-flex;align-items:center;gap:.5rem;transition:all .2s}.btn-secondary:hover{background:#e9d8fd;transform:translateY(-1px)}.game-viewport{width:100%;max-width:600px;background:#fff;border-radius:var(--radius-lg);position:relative;overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow-soft)}.game-hud{display:flex;justify-content:flex-end;padding:1rem;position:absolute;top:0;right:0;z-index:10}.game-stat{font-family:var(--font-sans);font-size:.75rem;font-weight:700;color:var(--navy);background:#ffffffe6;padding:.25rem .75rem;border-radius:99px;border:1px solid var(--border-subtle)}.main-nav{padding:1.5rem 0;display:flex;justify-content:center}.nav-brand{font-family:var(--font-serif);font-size:1.5rem;color:var(--text-main);text-decoration:none;display:flex;align-items:center;gap:.5rem}.game-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#ffffffe6;display:flex;flex-direction:column;justify-content:center;align-items:center;z-index:30;text-align:center;animation:fadeIn .5s ease-out}.game-overlay h2{font-size:2rem;margin-bottom:1rem;color:var(--text-main)}.game-overlay p{color:var(--text-muted);margin-bottom:2rem;max-width:80%}.main-footer{padding:2rem 0;margin-top:auto;text-align:center;font-size:.8rem;color:var(--text-muted)}.main-footer a{color:var(--text-muted);text-decoration:none;margin:0 .5rem}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.grid-container-2048{width:calc(100% - 2rem);max-width:min(calc(100vh - 300px),320px);aspect-ratio:1/1;background:#bbada0;border-radius:var(--radius-md);padding:10px;position:relative;box-sizing:border-box;margin:0 auto;touch-action:none}@media (max-width: 360px){.grid-container-2048{transform:scale(.85)}}.grid-bg-layer{display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(4,1fr);gap:10px;width:100%;height:100%}.grid-cell{width:100%;height:100%;background:#fff6;border-radius:4px}.tile{position:absolute;border-radius:4px;display:flex;justify-content:center;align-items:center;font-size:clamp(.875rem,4vw,1.5rem);font-weight:700;transition:transform 80ms ease-out;z-index:10;top:0;left:0;-webkit-user-select:none;user-select:none}.tile-inner{width:100%;height:100%;border-radius:4px;display:flex;justify-content:center;align-items:center;font-size:1.5rem;font-weight:700}.tile-new{animation:spawn .2s ease-out backwards}@keyframes spawn{0%{transform:scale(0)}to{transform:scale(1)}}.tile-2{background:#e6fffa;color:var(--navy)}.tile-4{background:#b2f5ea;color:var(--navy)}.tile-8{background:#81e6d9;color:var(--navy)}.tile-16{background:#4fd1c5;color:#fff}.tile-32{background:#63b3ed;color:#fff}.tile-64{background:#4299e1;color:#fff}.tile-128{background:var(--navy);color:#fff;box-shadow:0 0 10px #1a202c4d}.tile-256{background:#2c5282;color:#fff;box-shadow:0 0 10px #2c528266}.tile-512{background:#4a5568;color:#fff;box-shadow:0 0 15px #4a556866}.tile-1024{background:#2d3748;color:#fff;box-shadow:0 0 15px #2d374880}.tile-2048{background:var(--gold);color:var(--navy);box-shadow:0 0 25px #c5a572cc;border:2px solid white}.tile-4096{background:#744210;color:#fdfbf7;box-shadow:0 0 20px #74421099}.tile-merged{animation:pop .15s ease-in-out}@keyframes pop{0%{transform:scale(1)}50%{transform:scale(1.15)}to{transform:scale(1)}}