:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f5f6f8;--card-bg:#fff;--text:#1c1c1e;--muted:#6b7280;--accent:#2563eb;--border:#e2e4e8;--error:#dc2626;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0}.screen{max-width:480px;margin:0 auto;padding:20px 16px 40px}h1{margin:0 0 12px;font-size:1.25rem}h2{margin:24px 0 8px;font-size:1rem}.muted{color:var(--muted);font-size:.9rem}.error{color:var(--error)}textarea,input{border:1px solid var(--border);border-radius:8px;width:100%;margin-bottom:10px;padding:10px;font-family:inherit;font-size:.95rem}button{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:10px 16px;font-size:.95rem}button:disabled{opacity:.5;cursor:default}.link-button{color:var(--accent);background:0 0;margin-bottom:12px;padding:0}.channel-list,.feedback-list{margin:0;padding:0;list-style:none}.channel-list li{margin-bottom:8px}.feedback-list li{background:var(--card-bg);border:1px solid var(--border);border-radius:8px;margin-bottom:8px;padding:10px}.feedback-list li.unread{border-left:3px solid var(--accent)}.feedback-meta{color:var(--muted);margin-bottom:4px;font-size:.8rem}.about-text{white-space:pre-wrap}