@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=Source+Serif+4:opsz,wght@8..60,500;8..60,600;8..60,700&display=swap");:root{--fg:#0f1c1a;--muted:#5a6b67;--accent:#0f766e;--accent-2:#c45c26;--bg:#eef4f1;--bg-deep:#d7e6df;--surface:rgba(255,255,255,0.72);--line:rgba(15,28,26,0.1);--ok:#157a4b;--danger:#b42318;--radius:14px;--font-sans:"Manrope",system-ui,sans-serif;--font-display:"Source Serif 4",Georgia,serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font-sans);color:var(--fg);background:radial-gradient(1200px 600px at 8% -10%,rgba(15,118,110,.18),transparent 55%),radial-gradient(900px 500px at 100% 0,rgba(196,92,38,.12),transparent 50%),linear-gradient(180deg,var(--bg) 0,var(--bg-deep) 100%);min-height:100vh}main{max-width:1080px;margin:0 auto;padding:32px 24px 64px}header.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:48px;gap:16px}.logo{font-family:var(--font-display);font-weight:700;font-size:28px;letter-spacing:-.03em;color:var(--fg);text-decoration:none}.nav{display:flex;gap:10px;align-items:center;flex-wrap:wrap}h1{font-family:var(--font-display);font-size:clamp(2.2rem,5vw,3.4rem);line-height:1.08;letter-spacing:-.02em;margin:0 0 16px;max-width:14ch;animation:rise .7s ease both}p.lead{font-size:1.15rem;line-height:1.55;color:var(--muted);max-width:38rem;margin:0 0 28px;animation:rise .7s ease .08s both}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:40px;animation:rise .7s ease .14s both}.btn,button{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border:0;border-radius:999px;background:var(--accent);color:#fff;font:600 15px/1 var(--font-sans);cursor:pointer;text-decoration:none;transition:transform .15s ease,background .15s ease,box-shadow .15s ease}.btn:hover,button:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(15,118,110,.25)}.btn:disabled,button:disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}.btn.ghost,button.ghost{background:transparent;color:var(--fg);border:1px solid var(--line);box-shadow:none}.btn.ghost:hover,button.ghost:hover{background:rgba(255,255,255,.5);box-shadow:none}.btn.secondary{background:var(--accent-2)}.btn.secondary:hover{box-shadow:0 8px 20px rgba(196,92,38,.25)}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);animation:rise .7s ease .18s both}.panel h2{font-family:var(--font-display);font-size:1.45rem;margin:0 0 8px}.panel .hint{color:var(--muted);margin:0 0 16px;font-size:.95rem}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));grid-gap:14px;gap:14px;margin:40px 0}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.card h3{margin:0 0 8px;font-size:1.05rem}.card p{margin:0;color:var(--muted);line-height:1.45}form.stack{display:grid;grid-gap:12px;gap:12px}form.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}label{display:grid;grid-gap:6px;gap:6px;font-size:.9rem;font-weight:600;color:var(--fg)}input,select{padding:12px 14px;border:1px solid var(--line);border-radius:10px;font:400 16px/1.2 var(--font-sans);background:#fff;color:var(--fg);width:100%}.calc-result{margin-top:16px;padding:16px;border-radius:12px;background:linear-gradient(135deg,rgba(15,118,110,.12),rgba(196,92,38,.1));border:1px solid var(--line)}.calc-result strong{display:block;font-family:var(--font-display);font-size:1.8rem;margin-top:4px}.msg{font-size:.92rem}.msg.ok{color:var(--ok)}.msg.err{color:var(--danger)}.status-pill{display:inline-block;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:700;background:rgba(15,118,110,.12);color:var(--accent)}.status-pill.invalid{background:rgba(180,35,24,.12);color:var(--danger)}.keys-list{display:grid;grid-gap:10px;gap:10px;margin-top:16px}.key-row{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#fff}footer{color:var(--muted);font-size:14px;margin-top:56px;border-top:1px solid var(--line);padding-top:18px}@keyframes rise{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}@media (max-width:640px){main{padding:24px 16px 48px}h1{max-width:none}}