:root{--bg:#f3f6fb;--bg-accent:#d7e5ff;--surface:#ffffff;--surface-border:#dbe3ef;--text:#172033;--muted:#576279;--primary:#1d4ed8;--primary-strong:#1e40af;--error:#b91c1c;--ok:#0f766e;--radius:16px;--shadow:0 16px 36px -28px rgba(15,23,42,0.5)}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:Avenir Next,Segoe UI,sans-serif;color:var(--text);background:radial-gradient(circle at 10% 0,var(--bg-accent) 0,transparent 35%),linear-gradient(180deg,#f8fbff 0,var(--bg) 100%)}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-strong)}.app-shell{max-width:860px;margin:0 auto;padding:20px 16px 40px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:22px}.brand{font-weight:700;font-size:1.06rem;color:var(--text)}.nav-links{display:flex;flex-wrap:wrap;gap:10px;font-size:.95rem}.hero{margin-bottom:16px}.hero h1{margin:0;font-size:clamp(1.5rem,3vw,2rem)}.hero p{margin:8px 0 0;color:var(--muted)}.surface{background:var(--surface);border:1px solid var(--surface-border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);margin:14px 0}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:14px;gap:14px}.choice-card{display:block;background:var(--surface);border:1px solid var(--surface-border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);transition:transform .12s ease,border-color .12s ease}.choice-card:hover{transform:translateY(-2px);border-color:#9fbcff}.choice-card h2{margin:0;font-size:1.1rem}.choice-card p{margin:8px 0 0;color:var(--muted)}label,legend{display:block;margin:10px 0 8px;font-weight:600;color:var(--text)}button,input,select,textarea{width:100%;font:inherit}input,select,textarea{border:1px solid #cad5e8;border-radius:12px;padding:10px 12px;margin-top:6px;background:#fff}textarea{min-height:94px;resize:vertical}input:focus,select:focus,textarea:focus{outline:2px solid #bfdbfe;border-color:#93c5fd}.primary-link,button{display:inline-flex;align-items:center;justify-content:center;width:auto;border:0;border-radius:12px;padding:10px 14px;background:var(--primary);color:white;font-weight:600;cursor:pointer;margin-top:12px}.primary-link:hover,button:hover{background:var(--primary-strong);color:white}.timestamp-card{margin:6px 0 14px;padding:12px;border:1px solid #d7dfeb;border-radius:12px;background:linear-gradient(180deg,#f8fbff,#f4f8ff)}.timestamp-card label{margin-top:0}.timestamp-help{margin:8px 0 0;font-size:.9rem;color:var(--muted)}fieldset{border:1px solid #d7dfeb;border-radius:12px;margin:12px 0;padding:8px 12px 12px}.inline-check{display:flex;gap:8px;align-items:center;margin:8px 0;font-weight:500}.inline-check input{width:16px;height:16px;margin:0}.status-wrap{margin-top:8px}.status-error,.status-ok{margin:8px 0;font-weight:600}.status-ok{color:var(--ok)}.status-error{color:var(--error)}.muted{color:var(--muted);margin:0 0 12px}.result-list{margin-top:8px}pre{white-space:pre-wrap;word-break:break-word;background:#f5f7fb;border:1px solid #e2e8f0;padding:12px;margin-top:12px;font-size:.85rem}.entry-image,pre{border-radius:12px}.entry-image{max-width:100%;height:auto;border:1px solid #d9e1ef}@media (max-width:640px){.topbar{flex-direction:column;align-items:flex-start}.nav-links{font-size:.9rem}}