:root{--color-bg: #0f172a;--color-surface: #1e293b;--color-primary: #818cf8;--color-primary-hover: #6366f1;--color-text: #f8fafc;--color-text-muted: #94a3b8;--color-border: #334155;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .3);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .5), 0 2px 4px -2px rgb(0 0 0 / .5);--radius-md: .5rem;--radius-lg: .75rem;--font-base: "Inter", system-ui, -apple-system, sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-base);background-color:var(--color-bg);color:var(--color-text);line-height:1.5;-webkit-font-smoothing:antialiased}#root{max-width:800px;margin:0 auto;padding:2rem 1rem}h1,h2,h3{font-weight:700;line-height:1.2;margin-bottom:1rem}h1{margin-bottom:2rem}.logo{font-weight:900;font-size:3rem;background:linear-gradient(135deg,#e0e7ff,#6366f1);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin:0;letter-spacing:-.05em;display:inline-block}h2{font-size:1.5rem;margin-bottom:1rem}.card{background:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:1.5rem;margin-bottom:2rem;border:1px solid var(--color-border)}.form-group{margin-bottom:1rem}label{display:block;font-size:.875rem;font-weight:500;margin-bottom:.5rem;color:var(--color-text-muted)}input[type=number]{width:100%;padding:.75rem;border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:1rem;transition:border-color .15s ease}input[type=number]:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #6366f11a}.btn-group{display:flex;gap:.5rem;margin-bottom:1rem;flex-wrap:wrap}.btn{padding:.5rem 1rem;border:1px solid var(--color-border);background:var(--color-surface);border-radius:var(--radius-md);cursor:pointer;font-size:.875rem;font-weight:500;transition:all .15s ease;color:var(--color-text)}.btn:hover{background:var(--color-bg)}.btn.active{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}.result-row{display:flex;justify-content:space-between;padding:.75rem 0;border-bottom:1px solid var(--color-border)}.result-row:last-child{border-bottom:none;font-weight:700;font-size:1.125rem;color:var(--color-primary)}.result-label{color:var(--color-text-muted)}.tabs{display:flex;gap:1rem;margin-bottom:1.5rem;border-bottom:1px solid var(--color-border)}.tab{padding:.5rem 1rem;cursor:pointer;border-bottom:2px solid transparent;color:var(--color-text-muted);font-weight:500}.tab.active{color:var(--color-primary);border-bottom-color:var(--color-primary)}@media(max-width:600px){h1{font-size:1.75rem}}.grid-layout{display:flex;flex-direction:column;gap:2rem}@media(min-width:900px){.grid-layout{display:grid;grid-template-columns:1fr 1fr;gap:2rem}}.footer-link{color:inherit;text-decoration:none;transition:opacity .2s}.footer-link:hover{text-decoration:underline;opacity:.8}