:root{--bg: #0c0f14;--surface: #151a22;--border: #2a3344;--text: #e8edf5;--muted: #8b98ad;--accent: #5eead4;--danger: #fb7185;--positive: #86efac;--font-sans: "DM Sans", system-ui, sans-serif;--font-display: "Fraunces", Georgia, serif}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--bg);color:var(--text);font-family:var(--font-sans);line-height:1.5}body{background-image:radial-gradient(ellipse 80% 50% at 50% -20%,rgba(94,234,212,.14),transparent),radial-gradient(ellipse 60% 40% at 100% 0%,rgba(129,140,248,.08),transparent)}#app{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem 1.25rem}.shell{width:min(420px,100%);background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:1.75rem 1.5rem 1.5rem;box-shadow:0 24px 48px #00000059,inset 0 1px #ffffff0a}.head-title{margin:0 0 1rem;font-family:var(--font-display);font-size:1.45rem;font-weight:600;letter-spacing:-.02em;text-align:center;line-height:1.2}.head-title-line{display:block}.head-title-line--sub{margin-top:.2rem;font-size:.92em;font-weight:600;letter-spacing:-.01em;color:var(--muted)}.lede{margin:0;color:var(--muted);font-size:.95rem}.explain{margin:.85rem 0 0;color:var(--muted);font-size:.82rem;line-height:1.55}.metric-hint{margin:1rem 0 0;padding:0;color:var(--muted);font-size:.78rem;line-height:1.45}.interpret{margin:1rem 0 0;font-size:.82rem;font-style:italic;color:var(--muted);line-height:1.5}.controls{display:flex;flex-direction:column;gap:.65rem;margin-top:1.5rem}.controls-row{display:flex;gap:.75rem;align-items:flex-end}.symbol-hint{margin:0;font-size:.78rem;line-height:1.45;color:var(--muted)}.symbol-hint a,.explain a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}.symbol-hint a:hover,.explain a:hover{color:#7ff5e4}.field{flex:1;display:flex;flex-direction:column;gap:.35rem}.label{font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}.field input{width:100%;padding:.6rem .75rem;border-radius:10px;border:1px solid var(--border);background:var(--bg);color:var(--text);font:inherit}.field input:focus{outline:2px solid rgba(94,234,212,.45);outline-offset:1px}.btn{padding:.6rem 1rem;border-radius:10px;border:1px solid rgba(94,234,212,.4);background:linear-gradient(180deg,#5eead42e,#5eead40f);color:var(--text);font:inherit;font-weight:600;cursor:pointer;white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn:not(:disabled):hover{border-color:#5eead4a6}.status{margin-top:1.25rem;font-size:.9rem;min-height:1.35em}.status.loading{color:var(--muted);display:flex;justify-content:center;align-items:center}.status-loading{position:relative;display:inline-flex;align-items:center;min-height:1.35em}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.spinner{width:1.125rem;height:1.125rem;border:2px solid rgba(94,234,212,.22);border-top-color:var(--accent);border-radius:50%;animation:spinner-rotate .7s linear infinite}@keyframes spinner-rotate{to{transform:rotate(360deg)}}.status.ok{color:var(--muted)}.status.err{color:var(--danger)}.metrics{list-style:none;margin:1rem 0 0;padding:0;display:flex;flex-direction:column;gap:.75rem}.metrics li{display:flex;justify-content:space-between;align-items:baseline;padding:.65rem .75rem;background:var(--bg);border-radius:10px;border:1px solid var(--border)}.metrics .k{color:var(--muted);font-size:.85rem}.metrics .v{font-variant-numeric:tabular-nums;font-weight:600}.metrics .v.pos{color:var(--danger)}.metrics .v.neg{color:var(--positive)}.metrics .v.na{color:var(--muted);font-weight:500}.site-footer{margin-top:2rem;font-size:.72rem;line-height:1.5;color:var(--muted);text-align:center}.site-footer p{margin:0}.site-footer p+p{margin-top:.35rem}.site-footer a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}.site-footer a:hover{color:#7ff5e4}