:root{--bg:#f7f7f5;--fg:#1d1d1b;--muted:#6b6b66;--accent:#2f6f5e;--accent-fg:#fff;--card:#fff;--border:#dcdcd6;--error:#b3261e;color:var(--fg);background:var(--bg);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.45}@media (prefers-color-scheme:dark){:root{--bg:#141413;--fg:#ececea;--muted:#a3a39d;--accent:#6fc2a8;--accent-fg:#0f2a22;--card:#1f1f1d;--border:#3a3a36;--error:#f2b8b5}}*{box-sizing:border-box}body{background:var(--bg);margin:0}.app{max-width:440px;min-height:100dvh;margin:0 auto;padding:16px}.app-header{color:var(--accent);margin-bottom:24px;font-weight:700}h1{margin:0 0 16px;font-size:1.5rem}h2{color:var(--muted);margin:0 0 8px;font-size:1rem;font-weight:600}.field{border:0;flex-direction:column;gap:6px;margin:0 0 16px;padding:0;display:flex}.field label,.field legend{margin-bottom:6px;padding:0;font-weight:600}.row-fields .field label{color:var(--muted);font-weight:400}.row-fields .field{margin-bottom:0}.field input{font:inherit;border:1px solid var(--border);background:var(--card);color:var(--fg);border-radius:10px;padding:12px;font-size:1.125rem}.field input[aria-invalid=true]{border-color:var(--error)}.field-error{color:var(--error);margin:0;font-size:.9rem}.field-hint,.hint{color:var(--muted);margin:0 0 12px;font-size:.9rem}button{font:inherit;background:var(--accent);color:var(--accent-fg);cursor:pointer;border:0;border-radius:10px;padding:12px 20px;font-weight:600}button.link{color:var(--accent);background:0 0;padding:12px 0}.choices{flex-direction:column;gap:12px;display:flex}.choices.row{flex-direction:row}.choice{background:var(--card);color:var(--fg);border:1px solid var(--border);text-align:left;flex:1}.choice[aria-pressed=true]{border-color:var(--accent);outline:2px solid var(--accent)}.nav{justify-content:space-between;align-items:center;margin-top:24px;display:flex}.factors{color:var(--muted);padding-left:20px}.card{background:var(--card);border:1px solid var(--border);border-radius:14px;margin-bottom:16px;padding:16px}.range{margin:0;font-size:2rem;font-weight:700}.mid{color:var(--muted);margin:4px 0 8px}.disclaimer{color:var(--muted);font-size:.85rem}.row-fields{grid-template-columns:1fr 1fr;align-items:start;gap:12px;display:grid}.row-fields>.field{min-width:0}.field input{width:100%;min-width:0}.percentile{margin:0 0 8px;font-size:1.25rem;font-weight:700}.notice{border-color:var(--accent)}.field .radio{align-items:center;gap:10px;margin:0;padding:6px 0;font-weight:400;display:flex}.field .radio input{width:auto;accent-color:var(--accent);margin:0;padding:0}.app-nav{gap:16px;margin:-12px 0 20px;display:flex}.app-nav button{padding:6px 0}.app-nav button[aria-current=page]{text-underline-offset:4px;text-decoration:underline}.habits{margin:0;padding:0;list-style:none}.habit-main{align-items:center;gap:12px;font-weight:600;display:flex}.habit-main input{width:22px;height:22px;accent-color:var(--accent);flex:none}.habit .hint{margin:6px 0 0 34px}button.small{padding:6px 0 0 34px;font-size:.9rem}