@import"https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap";#root{min-height:100vh}:root{--bg-primary: #0c0a14;--bg-secondary: #141119;--bg-tertiary: #1a2030;--bg-card: #151820;--accent-primary: #06b6d4;--accent-secondary: #0891b2;--accent-glow: rgba(6, 182, 212, .15);--accent-glow-strong: rgba(6, 182, 212, .3);--text-primary: #e8f0f5;--text-secondary: #8a9bab;--text-muted: #5a6a7a;--success: #22c55e;--success-bg: rgba(34, 197, 94, .1);--error: #ff6b6b;--error-bg: rgba(255, 107, 107, .1);--border-color: rgba(255, 255, 255, .08);--border-focus: rgba(6, 182, 212, .5);--font-display: "JetBrains Mono", "SF Mono", "Fira Code", monospace;--font-body: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--radius-sm: 6px;--radius-md: 12px;--radius-lg: 20px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 20px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 40px rgba(0, 0, 0, .5);--shadow-glow: 0 0 30px var(--accent-glow)}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px}body{font-family:var(--font-body);background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;overflow-x:hidden}.app{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:2rem;position:relative}.background-grid{position:fixed;inset:0;background-image:linear-gradient(rgba(6,182,212,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(6,182,212,.03) 1px,transparent 1px);background-size:50px 50px;pointer-events:none;z-index:0}.background-glow{position:fixed;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(ellipse at center,rgba(6,182,212,.05) 0%,transparent 50%);pointer-events:none;z-index:0}.header{text-align:center;margin-bottom:2rem;z-index:1}.title{font-family:var(--font-display);font-size:2.5rem;font-weight:700;color:var(--text-primary);margin-bottom:.5rem;display:flex;align-items:center;justify-content:center;gap:.75rem}.title-icon{font-size:2rem}.subtitle{color:var(--text-secondary);font-size:1.1rem}.main{flex:1;width:100%;max-width:700px;z-index:1}.footer{margin-top:2rem;color:var(--text-muted);font-size:.875rem;text-align:center;z-index:1}.menu-screen{display:flex;flex-direction:column;align-items:center;gap:2rem}.play-button{display:flex;flex-direction:column;align-items:center;gap:.5rem;padding:2rem 4rem;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));border:none;border-radius:var(--radius-lg);cursor:pointer;transition:all .3s ease;box-shadow:var(--shadow-glow);width:100%;max-width:400px}.play-button:hover{transform:translateY(-4px);box-shadow:0 0 50px var(--accent-glow-strong)}.play-icon{font-size:3rem}.play-text{font-size:1.5rem;font-weight:700;color:#fff}.play-description{font-size:.875rem;color:#fffc}.pairs-divider{color:var(--text-muted);font-size:.9rem;text-transform:uppercase;letter-spacing:.1em;font-family:var(--font-display)}.pairs-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:.75rem;width:100%}.pair-button{display:flex;align-items:center;gap:.75rem;padding:1rem 1.25rem;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;transition:all .2s ease;text-align:left;color:var(--text-primary);font-family:var(--font-body)}.pair-button:hover{border-color:var(--accent-primary);box-shadow:0 0 20px var(--accent-glow);transform:translateY(-2px);background:var(--bg-tertiary)}.pair-button__icon{font-size:1.5rem;flex-shrink:0}.pair-button__info{display:flex;flex-direction:column;gap:.1rem}.pair-button__name{font-size:.85rem;font-weight:600;color:var(--text-primary)}.pair-button__units{font-family:var(--font-display);font-size:.8rem;color:var(--text-secondary)}.game-screen{display:flex;flex-direction:column;align-items:center;gap:1.5rem;width:100%}.game-status{display:flex;align-items:center;justify-content:space-between;width:100%;padding:1rem 1.5rem;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md)}.lives{display:flex;gap:.4rem;font-size:1.4rem}.score-display{font-family:var(--font-display);font-size:1.1rem;font-weight:600;color:var(--text-primary)}.score-display span{color:var(--accent-primary)}.game-prompt{font-size:1.1rem;color:var(--text-secondary);text-align:center}.value-buttons{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;width:100%}.value-button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.25rem;padding:2.5rem 1.5rem;background:var(--bg-card);border:2px solid var(--border-color);border-radius:var(--radius-lg);cursor:pointer;transition:all .2s ease;font-family:var(--font-display);min-height:140px}.value-button:hover:not(:disabled){border-color:var(--accent-primary);box-shadow:0 0 25px var(--accent-glow);transform:scale(1.03);background:var(--bg-tertiary)}.value-button:disabled{cursor:default}.value-button__value{font-size:2rem;font-weight:700;color:var(--text-primary);line-height:1.2;text-align:center}.value-button__converted{font-size:.95rem;font-weight:500;color:var(--text-secondary);margin-top:.25rem;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.value-button--correct{border-color:var(--success)!important;box-shadow:0 0 30px #22c55e4d!important;background:var(--success-bg)!important}.value-button--wrong{border-color:var(--error)!important;box-shadow:0 0 30px #ff6b6b4d!important;background:var(--error-bg)!important}.value-button--dimmed{opacity:.4}.feedback-banner{font-family:var(--font-display);font-size:1.2rem;font-weight:700;padding:.75rem 2rem;border-radius:var(--radius-md);text-align:center;animation:feedbackPop .3s ease}.feedback-banner--correct{color:var(--success);background:var(--success-bg);border:1px solid rgba(34,197,94,.2)}.feedback-banner--wrong{color:var(--error);background:var(--error-bg);border:1px solid rgba(255,107,107,.2)}@keyframes feedbackPop{0%{transform:scale(.8);opacity:0}50%{transform:scale(1.05)}to{transform:scale(1);opacity:1}}.btn{font-family:var(--font-body);font-weight:600;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all .2s ease;text-align:center}.btn--back{padding:.75rem 2rem;font-size:.9rem;background:transparent;color:var(--text-muted);border:1px solid var(--border-color)}.btn--back:hover{color:var(--text-secondary);border-color:var(--text-muted);background:var(--bg-secondary)}.gameover-screen{display:flex;flex-direction:column;align-items:center;gap:1.5rem;text-align:center}.gameover-title{font-family:var(--font-display);font-size:2rem;font-weight:700;color:var(--text-primary)}.gameover-score{font-family:var(--font-display);font-size:1.3rem;color:var(--text-secondary)}.gameover-score span{color:var(--accent-primary);font-weight:700}.gameover-actions{display:flex;gap:1rem;margin-top:1rem}.btn--primary{padding:1rem 3rem;font-size:1.1rem;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;box-shadow:var(--shadow-glow);font-family:var(--font-body);font-weight:600;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all .2s ease}.btn--primary:hover{transform:translateY(-2px);box-shadow:0 0 40px var(--accent-glow-strong)}@media(max-width:768px){.app{padding:1rem}.title{font-size:1.75rem}.title-icon{font-size:1.5rem}.subtitle{font-size:1rem}.play-button{padding:1.5rem 3rem}.play-icon{font-size:2.5rem}.play-text{font-size:1.25rem}}@media(max-width:520px){.value-buttons{grid-template-columns:1fr;gap:1rem}.value-button{padding:2rem 1.5rem;min-height:100px}.value-button__value{font-size:1.6rem}.pairs-grid{grid-template-columns:1fr}.gameover-actions{flex-direction:column;width:100%}.btn--primary,.btn--back{width:100%}}