:root{--bg-color: #121212;--surface-color: #1e1e1e;--primary-color: #f0c400;--text-color: #e0e0e0;--text-secondary-color: #a0a0a0;--border-color: #333;--green: #4caf50;--red: #f44336;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-color);font-size:16px;line-height:1.6}.app-container{max-width:1200px;margin:0 auto;padding:1rem}header{text-align:center;margin-bottom:2rem}h1{color:var(--primary-color);font-size:clamp(1.75rem,5vw,2.5rem);margin-bottom:.5rem}.disclaimer{background-color:#f0c4001a;border:1px solid var(--primary-color);border-radius:8px;padding:.5rem 1rem;max-width:600px;margin:0 auto;font-size:.9rem;color:var(--primary-color)}main{display:grid;gap:1.5rem}.controls-card,.chart-card{background-color:var(--surface-color);border-radius:12px;padding:1.5rem;border:1px solid var(--border-color)}h2{font-size:1.25rem;margin-bottom:1rem;color:var(--text-color)}.control-group{display:flex;flex-direction:column;gap:.5rem;margin-bottom:1rem}.control-group label{font-size:.9rem;color:var(--text-secondary-color)}select,input[type=number]{background-color:var(--bg-color);color:var(--text-color);border:1px solid var(--border-color);border-radius:8px;padding:.75rem;font-size:1rem;width:100%;min-height:48px}select:focus,input:focus{outline:2px solid var(--primary-color);border-color:var(--primary-color)}.loader{text-align:center;padding:2rem;color:var(--text-secondary-color)}.error-message{text-align:center;padding:1rem;background-color:#f443361a;border:1px solid var(--red);color:var(--red);border-radius:8px}.chart-controls{display:flex;flex-direction:column;gap:1rem;margin-bottom:1.5rem}.chart-container{width:100%;height:300px;position:relative}.chart-placeholder{display:flex;align-items:center;justify-content:center;height:100%;color:var(--text-secondary-color);background-color:var(--bg-color);border-radius:8px}@media (min-width: 768px){main{grid-template-columns:300px 1fr}.chart-controls{flex-direction:row;align-items:flex-end}.control-group{flex-grow:1}}.price-grid{display:grid;gap:1rem;margin-top:1.5rem}.price-card{background-color:var(--bg-color);border:1px solid var(--border-color);border-radius:8px;padding:1rem}.price-header{font-weight:700;color:var(--primary-color);margin-bottom:.75rem;text-align:center}.price-row{display:flex;justify-content:space-between;padding:.5rem 0;font-size:1rem}.price-row:not(:last-child){border-bottom:1px solid var(--border-color)}.price-row span:first-child{color:var(--text-secondary-color)}.price-row.buy span:last-child{color:var(--green);font-weight:500}.price-row.sell span:last-child{color:var(--red);font-weight:500}