:root{--color-bg: #121212;--color-surface-card: #1e1e1e;--color-grid-line: #2a2a2a;--color-overlay: rgba(0, 0, 0, .5);--color-text: #ffffff;--color-text-muted: rgba(255, 255, 255, .7);--color-text-disabled: rgba(255, 255, 255, .4);--color-primary: #4caf50;--color-primary-deep: #2e7d32;--color-score: #ffc107;--color-error: #f44336;--color-warning: #ff9800;--gradient-my-snake-from: #4caf50;--gradient-my-snake-to: #2e7d32;--gradient-food-shop-from: #ff9800;--gradient-food-shop-to: #f57c00;--gradient-leaderboard-from: #e91e63;--gradient-leaderboard-to: #c2185b;--gradient-settings-from: #2196f3;--gradient-settings-to: #0d47a1;--color-snake-red: #f44336;--color-snake-orange: #ff9800;--color-snake-yellow: #ffeb3b;--color-snake-green: #4caf50;--color-snake-blue: #2196f3;--color-snake-indigo: #ff00ff;--color-snake-violet: #8c00ff;--font-family-game: "GameFont", system-ui, -apple-system, sans-serif;--font-size-headline-lg: 32px;--font-size-headline-md: 24px;--font-size-body-lg: 18px;--font-size-body-md: 16px;--font-size-caption: 14px;--font-weight-bold: 700;--font-weight-regular: 400;--space-xs: 4px;--space-sm: 8px;--space-md: 12px;--space-lg: 20px;--space-xl: 32px;--radius-button: 20px;--radius-chip: 12px;--radius-chip-sm: 10px;--radius-card: 16px;--duration-fast: .15s;--duration-default: .3s;--duration-slow: .5s;--duration-stagger: 25ms;--easing-standard: cubic-bezier(.4, 0, .2, 1);--easing-elastic-out: cubic-bezier(.5, 1.5, .5, 1);--tap-target-min: 48px;--content-max-width: 480px}*,*:before,*:after{box-sizing:border-box}html,body,#root{margin:0;padding:0;background:var(--color-bg);color:var(--color-text);min-height:100dvh}.signin-screen{position:relative;min-height:100dvh;width:100%;background:var(--color-bg);color:var(--color-text);font-family:var(--font-family-game);display:flex;align-items:center;justify-content:center;overflow-x:hidden}.signin-screen__background{position:absolute;inset:0;pointer-events:none;background:radial-gradient(circle at 20% 20%,rgba(76,175,80,.08),transparent 40%),radial-gradient(circle at 80% 80%,rgba(33,150,243,.06),transparent 40%);z-index:0}.signin-screen__content{position:relative;z-index:1;width:100%;max-width:var(--content-max-width);padding:var(--space-xl) var(--space-lg);display:flex;flex-direction:column;align-items:stretch;gap:0}.signin-screen__logo{display:block;margin:0 auto 40px;width:min(450px,80vw);height:auto;user-select:none}.signin-screen__title{margin:0 0 24px;text-align:center;font-size:var(--font-size-headline-md);font-weight:var(--font-weight-bold);color:var(--color-text)}.signin-screen__banner{padding:10px;margin-bottom:16px;border-radius:8px;text-align:center;color:var(--color-text);font-size:var(--font-size-body-md)}.signin-screen__banner--error{background:#b71c1c99}.signin-screen__banner--success{background:#2e7d3299}.signin-screen__banner--warning{background:#ff980080}.signin-screen__form{display:flex;flex-direction:column;gap:16px}.signin-screen__field{display:flex;flex-direction:column;gap:4px}.signin-screen__label{font-size:var(--font-size-caption);color:var(--color-text-muted);padding-left:4px}.signin-screen__input{width:100%;padding:14px 12px;background:#404040;border:none;border-radius:8px;color:var(--color-text);font-size:var(--font-size-body-md);font-family:var(--font-family-game);outline:2px solid transparent;outline-offset:0;transition:outline-color var(--duration-fast) var(--easing-standard);box-sizing:border-box}.signin-screen__input:focus{outline-color:var(--color-primary)}.signin-screen__input:disabled{opacity:.6;cursor:not-allowed}.signin-screen__field-error{margin:0;padding-left:4px;color:var(--color-error);font-size:var(--font-size-caption)}.signin-screen__forgot{align-self:flex-end;background:transparent;border:none;color:var(--color-text-muted);font-size:var(--font-size-caption);font-family:var(--font-family-game);cursor:pointer;padding:4px 0}.signin-screen__forgot:hover:not(:disabled){color:var(--color-text)}.signin-screen__forgot:disabled{opacity:.5;cursor:not-allowed}.signin-screen__primary{margin-top:8px;width:100%;height:50px;background:var(--color-primary);color:var(--color-text);border:none;border-radius:8px;font-size:var(--font-size-body-md);font-weight:var(--font-weight-bold);font-family:var(--font-family-game);letter-spacing:.05em;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:background-color var(--duration-fast) var(--easing-standard)}.signin-screen__primary:hover:not(:disabled){background:var(--color-primary-deep)}.signin-screen__primary:disabled{background:#4caf5080;cursor:not-allowed}.signin-screen__spinner{width:20px;height:20px;border:2px solid rgba(255,255,255,.3);border-top-color:var(--color-text);border-radius:50%;animation:signin-spin .6s linear infinite}@keyframes signin-spin{to{transform:rotate(360deg)}}.signin-screen__toggle{margin-top:16px;background:transparent;border:none;color:var(--color-primary);font-size:var(--font-size-body-md);font-family:var(--font-family-game);cursor:pointer;padding:8px 0}.signin-screen__toggle:hover:not(:disabled){color:var(--color-primary-deep);text-decoration:underline}.signin-screen__toggle:disabled{opacity:.5;cursor:not-allowed}.signin-screen__guest{margin-top:8px;background:transparent;border:none;color:var(--color-text-muted);font-size:var(--font-size-caption);font-family:var(--font-family-game);cursor:pointer;padding:4px 0}.signin-screen__guest:hover:not(:disabled){color:var(--color-text);text-decoration:underline}.signin-screen__guest:disabled{opacity:.5;cursor:not-allowed}.home-screen{min-height:100dvh;width:100%;background:var(--color-bg);color:var(--color-text);font-family:var(--font-family-game);display:flex;align-items:center;justify-content:center}.home-screen__content{width:100%;max-width:var(--content-max-width);padding:var(--space-xl) var(--space-lg);display:flex;flex-direction:column;align-items:center;gap:var(--space-lg)}.home-screen__logo{display:block;width:min(200px,60vw);height:auto;user-select:none}.home-screen__banner{width:100%;padding:10px;border-radius:8px;text-align:center;color:var(--color-text);font-size:var(--font-size-body-md);box-sizing:border-box}.home-screen__banner--warning{background:#ff980080}.home-screen__banner--error{background:#b71c1c99}.home-screen__loading{margin:0;color:var(--color-text-muted);font-size:var(--font-size-body-md)}.home-screen__welcome{margin:0;text-align:center;font-size:var(--font-size-headline-lg);font-weight:var(--font-weight-bold);color:var(--color-text)}.home-screen__subtitle{margin:0;text-align:center;font-size:var(--font-size-body-md);color:var(--color-text-muted)}.home-screen__signout{margin-top:auto;background:transparent;border:none;color:var(--color-text-muted);font-size:var(--font-size-body-md);font-family:var(--font-family-game);cursor:pointer;padding:var(--space-md) var(--space-lg)}.home-screen__signout:hover:not(:disabled){color:var(--color-text);text-decoration:underline}.home-screen__signout:disabled{opacity:.5;cursor:not-allowed}