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960px){.portal-grid{grid-template-columns:repeat(3,1fr)}}.portal-card{display:flex;gap:12px;align-items:flex-start;padding:16px;border-radius:16px;background:var(--surface);border:1px solid var(--line);color:var(--ink);transition:transform .15s,box-shadow .15s}.portal-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow)}.portal-card .ic{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;flex:none;color:#fff}.portal-card h3{margin:0 0 2px}.portal-card p{margin:0;font-size:.88rem;color:var(--muted)}.prop{display:flex;gap:12px;align-items:flex-start}.prop .ic{width:40px;height:40px;border-radius:12px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;flex:none}.prop h3{margin:0 0 2px}.prop p{margin:0;color:var(--muted);font-size:.92rem}.steps{counter-reset:s;display:grid;gap:12px}@media (min-width: 800px){.steps{grid-template-columns:repeat(3,1fr)}}.step{background:var(--surface);border-radius:var(--radius);padding:18px;border:1px solid var(--line);color:var(--ink)}.step:before{counter-increment:s;content:counter(s);display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--accent);color:var(--accent-ink);font-weight:700;margin-bottom:10px}.hero-art{display:none}@media (min-width: 900px){.hero.split{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;padding-top:48px;padding-bottom:56px}.hero-art{display:block}}.ledger-preview{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:0 20px 50px #1416281f}.footer{padding:28px 16px 40px;color:var(--muted);font-size:.85rem;text-align:center}.auth-wrap{min-height:100dvh;display:grid;place-items:start center;padding:24px 16px}@media (min-width: 700px){.auth-wrap{place-items:center}}.auth-card{width:100%;max-width:440px}.demo-list{display:grid;grid-template-columns:1fr;gap:6px;margin-top:8px}@media (min-width: 480px){.demo-list{grid-template-columns:1fr 1fr}}.demo-list button{text-align:left;border:1px solid var(--line);background:var(--surface);border-radius:10px;padding:8px 10px;cursor:pointer;font-size:.82rem}.demo-list button:hover{border-color:var(--accent)}.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;font-size:.9rem}.kv dt{color:var(--muted)}.kv dd{margin:0}.hash{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.75rem;color:var(--muted);word-break:break-all}.message{max-width:80%;padding:10px 14px;border-radius:16px;background:var(--surface);border:1px solid var(--line);margin-bottom:8px}.message.mine{margin-left:auto;background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.message .time{font-size:.7rem;opacity:.7;margin-top:2px}.composer{position:sticky;bottom:calc(var(--nav-h) + env(safe-area-inset-bottom));background:var(--bg);padding:10px 0;display:flex;gap:8px}@media (min-width: 900px){.composer{bottom:0}}