:root{--bg: #0b0f14;--bg-elev: #121821;--bg-elev2: #1a2230;--border: #232d3d;--text: #e6edf3;--text-dim: #8b98a9;--accent: #4dd0a7;--accent-dim: #2f8f74;--danger: #ff6b6b;--warn: #f5c451;--radius: 10px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", Roboto, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:14px;line-height:1.5}a{color:var(--accent);text-decoration:none}button{font-family:inherit;cursor:pointer}.btn{background:var(--accent);color:#06231b;border:none;border-radius:var(--radius);padding:10px 16px;font-weight:600;font-size:14px;transition:background .15s}.btn:hover{background:#5fe0b8}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.secondary{background:var(--bg-elev2);color:var(--text);border:1px solid var(--border)}.btn.secondary:hover{background:#222d3d}.btn.danger{background:transparent;color:var(--danger);border:1px solid var(--danger)}.btn.ghost{background:transparent;color:var(--text-dim);border:none}input,textarea,select{background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:var(--radius);padding:10px 12px;font-family:inherit;font-size:14px;width:100%}input:focus,textarea:focus{outline:none;border-color:var(--accent-dim)}label{display:block;color:var(--text-dim);font-size:12px;margin:12px 0 6px;text-transform:uppercase;letter-spacing:.04em}.auth-wrap{min-height:100%;display:flex;align-items:center;justify-content:center;padding:24px}.auth-card{width:100%;max-width:420px;background:var(--bg-elev);border:1px solid var(--border);border-radius:16px;padding:32px}.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;margin-bottom:4px}.brand .dot{width:12px;height:12px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}.muted{color:var(--text-dim)}.error{color:var(--danger);font-size:13px;margin-top:10px}.notice{background:var(--bg-elev2);border:1px solid var(--border);border-left:3px solid var(--warn);border-radius:8px;padding:12px;font-size:13px;margin:12px 0}.recovery-key{font-family:ui-monospace,SF Mono,Menlo,monospace;background:var(--bg);border:1px dashed var(--accent-dim);border-radius:8px;padding:14px;word-break:break-all;letter-spacing:.05em;margin:8px 0}.app{display:grid;grid-template-columns:220px 340px 1fr;height:100%}.sidebar{background:var(--bg-elev);border-right:1px solid var(--border);padding:16px;display:flex;flex-direction:column}.nav-item{display:flex;align-items:center;justify-content:space-between;padding:9px 12px;border-radius:8px;color:var(--text-dim);cursor:pointer;margin-bottom:2px}.nav-item.active,.nav-item:hover{background:var(--bg-elev2);color:var(--text)}.nav-count{font-size:12px;background:var(--bg);padding:1px 7px;border-radius:10px}.list{background:var(--bg);border-right:1px solid var(--border);overflow-y:auto}.list-header{padding:14px 16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;background:var(--bg)}.mail-row{padding:12px 16px;border-bottom:1px solid var(--border);cursor:pointer}.mail-row:hover{background:var(--bg-elev)}.mail-row.active{background:var(--bg-elev2)}.mail-row.unread .mail-subject{font-weight:700}.mail-top{display:flex;justify-content:space-between;gap:8px}.mail-from{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mail-date{color:var(--text-dim);font-size:12px;flex-shrink:0}.mail-subject{margin-top:2px}.mail-snippet{color:var(--text-dim);font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.reader{overflow-y:auto;padding:24px 32px}.reader-empty{height:100%;display:flex;align-items:center;justify-content:center;color:var(--text-dim)}.reader h1{font-size:22px;margin:0 0 8px}.reader-meta{color:var(--text-dim);font-size:13px;border-bottom:1px solid var(--border);padding-bottom:16px;margin-bottom:16px}.reader-body{white-space:pre-wrap;word-wrap:break-word}.badge{display:inline-block;font-size:11px;padding:2px 8px;border-radius:10px;border:1px solid var(--border);margin-left:6px}.badge.e2e{color:var(--accent);border-color:var(--accent-dim)}.badge.ext{color:var(--warn);border-color:var(--warn)}.row{display:flex;gap:8px;align-items:center}.spacer{flex:1}.toolbar{display:flex;gap:8px;margin-bottom:16px}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:50;padding:24px}.modal{background:var(--bg-elev);border:1px solid var(--border);border-radius:14px;width:100%;max-width:640px;max-height:90vh;overflow-y:auto;padding:24px}.chip{display:inline-flex;gap:6px;align-items:center;background:var(--bg-elev2);border:1px solid var(--border);border-radius:20px;padding:3px 10px;font-size:12px;margin:2px}.settings{max-width:720px;margin:0 auto;padding:32px}.card{background:var(--bg-elev);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:16px}.card h3{margin:0 0 6px}.center{text-align:center}.mono{font-family:ui-monospace,Menlo,monospace;font-size:12px;color:var(--text-dim);word-break:break-all}