:root{--bg: #ffffff;--panel: #ffffff;--code-bg: #f6f7f9;--border: #e6e6ec;--border-strong: #d6d7e0;--text: #1a1a2e;--muted: #5b6270;--accent: #3b4cca;--accent-hover: #2f3da8;--accent-soft: #eef0fb;--accent-soft-border: #dfe3f7;--green: #157a3c;--green-bg: #f0fbf4;--green-border: #bce5cc;--red: #b6242a;--red-bg: #fdf3f3;--red-border: #f0c9cb;--amber: #9a6a06;--shadow-sm: 0 1px 2px rgba(16, 24, 40, .05);--shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 6px 18px rgba(16, 24, 40, .05);--mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;--sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);line-height:1.6;-webkit-font-smoothing:antialiased}code{font-family:var(--mono);font-size:.9em;background:var(--code-bg);border:1px solid var(--border);border-radius:5px;padding:.1em .4em}h1,h2,h3{line-height:1.15;letter-spacing:-.02em;color:var(--text)}.accent{color:var(--accent)}.btn{display:inline-flex;align-items:center;gap:.4em;font:inherit;font-weight:600;font-size:.95rem;padding:.7em 1.2em;border-radius:9px;border:1px solid var(--border-strong);background:var(--panel);color:var(--text);cursor:pointer;text-decoration:none;box-shadow:var(--shadow-sm);transition:transform .08s ease,border-color .15s ease,background .15s ease}.btn:hover{transform:translateY(-1px);background:#fafafc;border-color:#c3c4d0}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.btn-danger{border-color:var(--red-border);color:var(--red);background:var(--panel)}.btn-danger:hover{background:var(--red-bg);border-color:#e3a9ac}.btn-ghost{background:transparent;box-shadow:none;border-color:var(--border)}.hero{max-width:1080px;margin:0 auto;padding:0 24px}.nav{display:flex;justify-content:space-between;align-items:center;padding:22px 0}.brand{font-weight:700;letter-spacing:-.01em;color:var(--accent)}.nav-links{display:flex;gap:22px}.nav-links a{color:var(--muted);text-decoration:none;font-size:.95rem}.nav-links a:hover{color:var(--text)}.hero-body{padding:80px 0 64px;text-align:center}.eyebrow{display:inline-block;font-family:var(--mono);font-size:.8rem;color:var(--accent);border:1px solid var(--accent-soft-border);background:var(--accent-soft);border-radius:999px;padding:.35em .9em;margin-bottom:28px}.hero h1{font-size:clamp(2.4rem,6vw,4.2rem);margin:0 0 24px;font-weight:800}.lede{max-width:620px;margin:0 auto 32px;color:var(--muted);font-size:1.12rem}.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:28px}.install{display:inline-block;color:var(--muted)}.demo{max-width:1080px;margin:40px auto;padding:0 24px}.demo-head{text-align:center;margin-bottom:36px}.demo-head h2{font-size:clamp(1.8rem,4vw,2.6rem);margin:0 0 14px}.demo-head p{max-width:640px;margin:0 auto;color:var(--muted)}.demo-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:20px;align-items:stretch}.demo-panel{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:18px;box-shadow:var(--shadow);display:flex;flex-direction:column}.panel-label{display:flex;align-items:center;gap:10px;font-size:.85rem;color:var(--muted);margin-bottom:14px;text-transform:uppercase;letter-spacing:.04em}.step{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:6px;background:var(--accent-soft);border:1px solid var(--accent-soft-border);color:var(--accent);font-weight:700}.pubkey{margin-left:auto;font-family:var(--mono);text-transform:none;letter-spacing:0;font-size:.78rem;color:#9598a4}.receipt{flex:1;min-height:340px;resize:vertical;width:100%;background:var(--code-bg);color:#24292f;border:1px solid var(--border);border-radius:10px;padding:14px;font-family:var(--mono);font-size:.82rem;line-height:1.55;tab-size:2}.receipt:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.receipt:disabled{opacity:.6;cursor:wait}.demo-controls{justify-content:flex-start}.verdict{display:flex;align-items:center;gap:12px;font-size:1.15rem;font-weight:700;padding:18px;border-radius:10px;border:1px solid var(--border);margin-bottom:16px}.verdict-mark{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;font-size:1rem}.verdict-valid{color:var(--green);background:var(--green-bg);border-color:var(--green-border)}.verdict-valid .verdict-mark{background:var(--green);color:#fff}.verdict-invalid{color:var(--red);background:var(--red-bg);border-color:var(--red-border)}.verdict-invalid .verdict-mark{background:var(--red);color:#fff}.verdict-loading{color:var(--muted);background:var(--code-bg)}.verdict-error{color:var(--amber);background:#fdf8ee;border-color:#ecd9ad}.verdict-error .verdict-mark{background:var(--amber);color:#fff}p.verdict-error{display:block;font-size:.85rem;font-weight:400;color:var(--red);margin:-6px 0 12px;padding:0;border:0;background:none;font-family:var(--mono);word-break:break-word}.hint{color:var(--muted);font-size:.92rem;margin:4px 0 20px}.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:auto}.features{max-width:1080px;margin:90px auto;padding:0 24px}.why h2{font-size:clamp(1.8rem,4vw,2.6rem);text-align:center;margin:0 0 14px}.section-lede{max-width:660px;margin:0 auto 36px;text-align:center;color:var(--muted)}.compare{display:grid;grid-template-columns:1fr 1fr;gap:14px;max-width:760px;margin:0 auto}.compare-col{display:flex;flex-direction:column;gap:10px}.compare-head{font-weight:700;padding:12px 16px;border-radius:10px}.compare-ordinary .compare-head{background:var(--code-bg);border:1px solid var(--border);color:var(--muted)}.compare-signet .compare-head{background:var(--accent-soft);border:1px solid var(--accent-soft-border);color:var(--accent)}.compare-cell{padding:12px 16px;border-radius:10px;border:1px solid var(--border);background:var(--panel);font-size:.92rem;box-shadow:var(--shadow-sm)}.compare-signet .compare-cell{color:var(--text)}.compare-ordinary .compare-cell{color:var(--muted)}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:64px}.step-card{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:24px;box-shadow:var(--shadow)}.step-n{font-family:var(--mono);color:var(--accent);font-size:.9rem}.step-card h3{margin:10px 0 8px;font-size:1.3rem}.step-card p{color:var(--muted);margin:0;font-size:.95rem}.footer{border-top:1px solid var(--border);margin-top:80px;background:var(--code-bg)}.cta-block{max-width:720px;margin:0 auto;padding:80px 24px 60px;text-align:center}.cta-block h2{font-size:clamp(1.6rem,4vw,2.3rem);margin:0 0 16px}.cta-block p{color:var(--muted);margin:0 0 28px}.footer-meta{max-width:1080px;margin:0 auto;padding:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;border-top:1px solid var(--border);color:var(--muted);font-size:.85rem}.footer-meta span:last-child{font-family:var(--mono)}@media (max-width: 800px){.demo-grid,.steps{grid-template-columns:1fr}.nav-links{gap:16px}}