:root{--bg: #0a0e27;--surface: #131736;--surface-2: #1b2147;--accent: #00c9a7;--accent-dim: #0a8a76;--text: #e4e7f1;--text-dim: #8a91b8;--danger: #ff5757;--warning: #ffb830;--border: #2a3166;--radius: 14px;--radius-sm: 8px;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-6: 24px;--space-8: 32px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .25);--shadow-md: 0 8px 24px rgba(0, 0, 0, .35);--font-ui: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-num: "SF Mono", ui-monospace, "Roboto Mono", monospace;--ease: cubic-bezier(.22, 1, .36, 1);--press-scale: .96;--t-fast: .12s;--t-base: .2s}.fk-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em}.fk-btn{appearance:none;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:var(--radius-sm);padding:var(--space-3) var(--space-4);font-family:var(--font-ui);font-weight:600;cursor:pointer;transition:transform var(--t-fast) var(--ease),background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease)}.fk-btn:active{transform:scale(var(--press-scale))}.fk-btn--primary{background:var(--accent);border-color:var(--accent);color:#03150f}.fk-btn--primary:active{background:var(--accent-dim)}@media (prefers-reduced-motion: reduce){.fk-btn{transition:none}}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100dvh;background:var(--bg);color:var(--text);font-family:var(--font-ui);font-variant-numeric:tabular-nums;overflow:hidden;touch-action:none;-webkit-tap-highlight-color:transparent;user-select:none;-webkit-user-select:none}#app{position:relative;width:100%;max-width:430px;height:100dvh;margin:0 auto}#game{display:block;width:100%;height:100%}#hud{position:absolute;top:calc(env(safe-area-inset-top) + 10px);left:0;right:0;display:flex;flex-direction:column;align-items:center;gap:6px;pointer-events:none;z-index:5}#mode-chip{font-size:12px;font-weight:600;color:var(--text-dim);background:var(--surface);border:1px solid var(--border);padding:3px 12px;border-radius:99px;letter-spacing:.08em}#equation{display:flex;align-items:baseline;gap:7px;font-family:var(--font-num);font-variant-numeric:tabular-nums}#equation .lab{font-size:12px;color:var(--text-dim);font-family:var(--font-ui)}#equation .val{font-size:26px;font-weight:700;transition:transform .12s var(--ease)}#equation .op{font-size:16px;color:var(--text-dim)}#u-val{color:#e8c98a}#l-val{color:#37c6e0}#p-val{font-size:34px;color:var(--accent)}#equation .pulse{transform:scale(1.25)}#x2-chip{font-size:13px;font-weight:800;color:#0a0e27;background:var(--warning);padding:1px 8px;border-radius:99px;letter-spacing:.02em;opacity:0;transform:scale(.6);transition:opacity .16s var(--ease),transform .16s var(--ease);align-self:center}#x2-chip.on{opacity:1;transform:scale(1);animation:x2pulse 1.1s ease-in-out infinite}@keyframes x2pulse{0%,to{box-shadow:0 0 #ffb83080}50%{box-shadow:0 0 0 6px #ffb83000}}#actions{position:absolute;bottom:calc(env(safe-area-inset-bottom) + 18px);left:0;right:0;display:flex;justify-content:center;z-index:5}#finish-btn{min-width:200px;font-size:16px;padding:13px 28px;border-radius:99px;letter-spacing:.1em}#finish-btn.confirm{background:var(--warning);border-color:var(--warning);color:#241a02}#finish-btn.hidden{display:none}.overlay{position:absolute;inset:0;z-index:10;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:#060818eb;opacity:1;transition:opacity .22s var(--ease)}.overlay.hidden{opacity:0;pointer-events:none}#title-logo{font-size:104px;font-weight:800;line-height:1.1;color:var(--text);text-shadow:0 10px 0 rgba(55,198,224,.32),0 22px 28px rgba(0,0,0,.55)}#title-sub{font-size:14px;color:var(--text-dim);letter-spacing:.34em;margin-bottom:4px}#title-tag{font-size:13px;color:var(--text-dim);margin-bottom:22px}.menu-btn{min-width:230px;font-size:17px;padding:15px 22px}.menu-btn .sub{display:block;font-size:11px;font-weight:500;opacity:.75;margin-top:2px}.menu-btn:disabled{opacity:.55}#result-card{display:flex;flex-direction:column;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:30px 38px;box-shadow:var(--shadow-md);animation:stamp .36s var(--ease)}@keyframes stamp{0%{transform:scale(1.45);opacity:0}to{transform:scale(1);opacity:1}}#result-title{font-size:13px;color:var(--text-dim);letter-spacing:.2em}#result-eq{font-family:var(--font-num);font-size:22px;color:var(--text)}#result-eq .ru{color:#e8c98a}#result-eq .rl{color:#37c6e0}#result-score{font-family:var(--font-num);font-size:56px;font-weight:800;color:var(--accent)}#result-note{font-size:13px;color:var(--text-dim)}#result-actions{display:flex;gap:10px;margin-top:14px}@media (prefers-reduced-motion: reduce){.overlay,#equation .val{transition:none}#result-card,#x2-chip.on{animation:none}}