:root{--bg-primary: #0d1117;--bg-secondary: #161b22;--bg-tertiary: #21262d;--border: #30363d;--text-primary: #e6edf3;--text-secondary: #8b949e;--text-muted: #6e7681;--accent: #58a6ff;--accent-hover: #79c0ff;--success: #3fb950;--warning: #d29922;--danger: #f85149;--purple: #a371f7}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.5}#root{min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column}.header{padding:2rem;text-align:center;border-bottom:1px solid var(--border);background:var(--bg-secondary)}.logo{display:flex;align-items:center;justify-content:center;gap:.75rem;margin-bottom:.5rem}.logo-icon{color:var(--accent);width:32px;height:32px}.logo h1{font-size:1.75rem;font-weight:700;color:var(--text-primary)}.tagline{color:var(--text-secondary);font-size:.95rem}.tabs{display:flex;gap:0;background:var(--bg-secondary);padding:0 1rem;border-bottom:1px solid var(--border);overflow-x:auto}.tab{display:flex;align-items:center;gap:.5rem;padding:1rem 1.5rem;background:transparent;border:none;color:var(--text-secondary);font-size:.95rem;cursor:pointer;border-bottom:2px solid transparent;transition:all .2s ease;white-space:nowrap}.tab:hover{color:var(--text-primary);background:var(--bg-tertiary)}.tab.active{color:var(--accent);border-bottom-color:var(--accent)}.main{flex:1;padding:2rem;max-width:800px;margin:0 auto;width:100%}.calculator{background:var(--bg-secondary);border-radius:12px;padding:2rem;border:1px solid var(--border)}.calculator h2{display:flex;align-items:center;gap:.5rem;font-size:1.5rem;margin-bottom:.5rem;color:var(--text-primary)}.calculator h2 svg{color:var(--accent)}.description{color:var(--text-secondary);margin-bottom:1.5rem}.inputs{display:grid;gap:1rem;margin-bottom:2rem}.input-group{display:flex;flex-direction:column;gap:.5rem}.input-group label{display:flex;align-items:center;gap:.5rem;color:var(--text-secondary);font-size:.9rem}.input-group input{padding:.75rem 1rem;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:8px;color:var(--text-primary);font-size:1rem;transition:border-color .2s ease}.input-group input:focus{outline:none;border-color:var(--accent)}.input-group input::placeholder{color:var(--text-muted)}.results h3{font-size:1.1rem;color:var(--text-primary);margin-bottom:1rem;padding-bottom:.5rem;border-bottom:1px solid var(--border)}.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:1rem}.result-card{background:var(--bg-tertiary);border-radius:8px;padding:1rem;display:flex;flex-direction:column;gap:.25rem}.result-card.primary{background:linear-gradient(135deg,var(--bg-tertiary) 0%,rgba(88,166,255,.1) 100%);border:1px solid var(--accent)}.result-card .label{font-size:.85rem;color:var(--text-secondary)}.result-card .value{font-size:1.5rem;font-weight:700;color:var(--text-primary)}.result-card .value.positive{color:var(--success)}.result-card .value.negative{color:var(--danger)}.breakdown{display:flex;flex-direction:column;gap:.5rem}.breakdown-row{display:flex;justify-content:space-between;padding:.75rem;background:var(--bg-tertiary);border-radius:6px;color:var(--text-primary)}.breakdown-row.subtotal{border-left:3px solid var(--warning)}.breakdown-row.total{background:linear-gradient(135deg,var(--bg-tertiary) 0%,rgba(88,166,255,.1) 100%);border-left:3px solid var(--accent);font-weight:700;font-size:1.1rem}.footer{padding:1.5rem;text-align:center;border-top:1px solid var(--border);background:var(--bg-secondary)}.footer p{color:var(--text-muted);font-size:.85rem}@media(max-width:600px){.main{padding:1rem}.calculator{padding:1.5rem}.result-grid{grid-template-columns:1fr}.tab{padding:.75rem 1rem;font-size:.85rem}}