*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:radial-gradient(circle at top,rgba(255,255,255,.35),transparent 35%),linear-gradient(180deg,#82cfff,#c9f0ff 52%,#f5fbff);color:#16324f;overflow:hidden}button{font:inherit}.app-shell{height:100vh;width:100vw;display:flex;flex-direction:column;align-items:stretch;justify-content:stretch;padding:0;margin:0;overflow:hidden}.game-wrapper{flex:1;display:flex;flex-direction:column;width:100%;height:100vh;max-width:none}.scoreboard{display:flex;align-items:center;gap:14px;justify-content:space-between;margin:8px 16px 0;flex-wrap:wrap;flex-shrink:0}.score-card{min-width:120px;padding:14px 18px;border-radius:18px;background:#fffc;border:1px solid rgba(22,50,79,.08);box-shadow:0 12px 28px #275b861f}.score-card strong{display:block;margin-top:6px;font-size:1.6rem}.score-label{font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;color:#4b6b88}.game-area{position:relative;flex:1;width:100%;min-height:420px;overflow:hidden;background:linear-gradient(180deg,#ffffffbf,#dbf4fff5),linear-gradient(180deg,#8ed8ff,#dff6ff);border:none;box-shadow:none;margin:0 16px;border-radius:16px}.sky-glow{position:absolute;inset:0;background:radial-gradient(circle at 18% 18%,rgba(255,255,255,.55),transparent 18%),radial-gradient(circle at 88% 12%,rgba(255,238,173,.45),transparent 14%);pointer-events:none}.cloud{position:absolute;border-radius:999px;background:#ffffffeb;box-shadow:18px 10px 0 6px #ffffffeb,-18px 12px 0 2px #ffffffd9}.player-lane{position:absolute;inset:0}.player{position:absolute;border-radius:14px 14px 10px 10px;background:linear-gradient(180deg,#ff8c5a,#ff5f45);box-shadow:0 10px 20px #ff614547;transform-origin:bottom center;transition:box-shadow .2s ease}.player.running{animation:runnerBounce .32s infinite alternate ease-in-out}.player-eye{position:absolute;top:16px;right:12px;width:10px;height:10px;border-radius:50%;background:#fff}.player-leg{position:absolute;bottom:-10px;width:10px;height:18px;border-radius:99px;background:#26415f}.player-leg.left{left:11px}.player-leg.right{right:11px}.player.running .player-leg.left{animation:legKick .24s infinite alternate ease-in-out}.player.running .player-leg.right{animation:legKick .24s infinite alternate-reverse ease-in-out}.obstacle{position:absolute;border-radius:10px 10px 4px 4px;background:linear-gradient(180deg,#26415f,#1a2c43);box-shadow:inset 0 0 0 2px #ffffff14}.ground-line{position:absolute;left:0;right:0;bottom:90px;height:4px;background:linear-gradient(90deg,#2b8d56,#69c379)}.ground-fill{position:absolute;left:0;right:0;bottom:0;height:90px;background:linear-gradient(180deg,rgba(255,255,255,.14),transparent 25%),repeating-linear-gradient(90deg,rgba(255,255,255,.08) 0,rgba(255,255,255,.08) 22px,transparent 22px,transparent 44px),linear-gradient(180deg,#67c56a,#459c4f)}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:24px;background:#10233738;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.overlay-card{width:min(90%,420px);padding:30px 28px;border-radius:24px;background:#ffffffeb;box-shadow:0 20px 40px #12304d2e;text-align:center}.overlay-card.small{width:min(90%,320px)}.overlay-card h1,.overlay-card h2{margin:0 0 10px}.overlay-text{margin:0 0 16px;color:#4b6b88;line-height:1.5}.eyebrow{margin:0 0 8px;text-transform:uppercase;letter-spacing:.16em;font-size:.75rem;color:#5586ac}.hint-text,.control-note{margin:14px 0 0;font-size:.95rem;color:#54738f}.controls{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:0 16px 12px;padding-top:8px;flex-wrap:wrap;flex-shrink:0;border-top:1px solid rgba(22,50,79,.08)}.primary-button,.secondary-button,.jump-button{border:none;cursor:pointer;border-radius:999px;transition:transform .15s ease,box-shadow .15s ease,opacity .15s ease}.primary-button:hover,.secondary-button:hover,.jump-button:hover{transform:translateY(-1px)}.primary-button:disabled,.secondary-button:disabled,.jump-button:disabled{opacity:.45;cursor:not-allowed;transform:none}.primary-button{padding:14px 22px;color:#fff;background:linear-gradient(135deg,#ff8b5f,#ff6145);box-shadow:0 14px 24px #ff634840}.secondary-button{padding:12px 18px;color:#16324f;background:#fffc;border:1px solid rgba(22,50,79,.12)}.jump-button{min-width:140px;padding:14px 18px;color:#fff;background:linear-gradient(135deg,#1b6ef3,#1aa6ff);box-shadow:0 14px 24px #1d76f033}@keyframes runnerBounce{0%{transform:translateY(0)}to{transform:translateY(-4px)}}@keyframes legKick{0%{transform:rotate(16deg)}to{transform:rotate(-16deg)}}@media(max-width:768px){.scoreboard,.controls{justify-content:center;gap:12px;margin:8px 12px}.score-card{flex:1 1 120px;padding:12px 16px}.game-area{margin:0 12px}}