*{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0f172a;--card:#1e293b;--border:#334155;--text:#e2e8f0;--muted:#94a3b8;--accent:#3b82f6}html[data-theme=light]{--bg:#f8fafc;--card:#fff;--border:#e2e8f0;--text:#0f172a;--muted:#64748b;--accent:#3b82f6}body{font-family:system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}.container{max-width:640px;margin:0 auto;padding:16px}.topbar{justify-content:space-between;padding:8px 0 16px}.brand,.topbar{display:flex;align-items:center}.brand{gap:10px}.brand-icon{background:var(--accent);color:#fff;width:36px;height:36px;border-radius:10px;display:grid;place-items:center;font-size:1.1rem}.brand-name{font-weight:700;font-size:1.15rem}.icon-btn{background:none;border:none;cursor:pointer;font-size:1.2rem;color:var(--muted)}.hero h1{font-size:2rem}.subtitle{color:var(--muted);margin:4px 0 20px}.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px;margin-bottom:16px}.label{display:block;color:var(--muted);font-size:.75rem;letter-spacing:.05em;margin-bottom:8px}.address-display{padding:12px;border-radius:8px;border:1px dashed var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent);font-family:ui-monospace,monospace;margin-bottom:12px;word-break:break-all}.btn-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 14px;border-radius:8px;border:1px solid var(--border);background:transparent;color:var(--text);font-weight:600;cursor:pointer;font-size:.95rem}.btn:disabled{opacity:.5;cursor:default}.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}.btn-active{background:color-mix(in srgb,var(--text) 8%,transparent)}.btn-grow{flex:1 1;justify-content:center}.btn-link{background:none;border:none;cursor:pointer;font-weight:600;padding:8px 0;font-size:.95rem;color:var(--muted)}.divider{border:none;border-top:1px solid var(--border);margin:14px 0}.custom-form{margin-top:4px}.hint{color:var(--muted);font-size:.8rem;margin:-4px 0 12px}.input{width:100%;padding:12px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:1rem;margin-bottom:12px}.email-list{list-style:none}.email-list li{padding:14px;border:1px solid var(--border);border-radius:8px;margin-bottom:8px;cursor:pointer;display:flex;flex-direction:column;gap:4px}.email-list li:hover{background:var(--bg)}.email-list .subject,.email-list time{color:var(--muted)}.email-list time{font-size:.8rem}.email-list .empty{text-align:center;color:var(--muted);cursor:default;align-items:center;padding:32px 14px;border-style:dashed;gap:8px}.empty-icon{font-size:2rem}.footer{text-align:center;color:var(--muted);font-size:.85rem;padding:12px 0 24px}.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);display:flex;align-items:center;justify-content:center;padding:16px}.modal{background:var(--card);border-radius:12px;padding:20px;width:100%;max-width:560px;max-height:85vh;overflow-y:auto;position:relative}.modal .close{position:absolute;top:12px;right:12px;background:none;border:none;color:var(--muted);font-size:1.2rem;cursor:pointer}.modal .meta{color:var(--muted);margin-bottom:12px}.email-frame{width:100%;min-height:300px;border:none;background:#fff;border-radius:8px}.text-body{white-space:pre-wrap;word-break:break-word}