*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:#f0f2f5;color:#1a1a2e;min-height:100vh}a{color:#2563eb;text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;font-family:inherit}.app{max-width:960px;margin:0 auto;padding:0 16px 40px}.topbar{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid #e0e0e0;position:sticky;top:0;background:#f0f2f5;z-index:10}.topbar-brand{font-size:20px;font-weight:700;cursor:pointer;-webkit-user-select:none;user-select:none}.topbar-user{font-size:13px;font-weight:400;color:#666;margin-left:10px}.main{margin-top:20px}.btn{display:inline-flex;align-items:center;gap:4px;padding:8px 18px;border-radius:6px;border:1px solid #d0d0d0;background:#fff;font-size:14px;transition:all .15s}.btn:hover{border-color:#aaa}.btn-primary{background:#2563eb;color:#fff;border-color:#2563eb}.btn-primary:hover{background:#1d4ed8}.btn-danger{color:#dc2626;border-color:#fca5a5}.btn-danger:hover{background:#fef2f2}.btn-sm{padding:4px 10px;font-size:13px}.email-list{background:#fff;border-radius:8px;box-shadow:0 1px 3px #00000014}.email-item{display:flex;align-items:center;gap:14px;padding:14px 18px;border-bottom:1px solid #f0f0f0;cursor:pointer;transition:background .1s}.email-item:hover{background:#f8fafc}.email-item:first-child{border-radius:8px 8px 0 0}.email-item:last-child{border-radius:0 0 8px 8px;border-bottom:none}.email-item.unread{font-weight:600}.email-item.unread:before{content:"●";color:#2563eb;font-size:10px;flex-shrink:0}.email-item .ei-from{width:160px;flex-shrink:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.email-item .ei-subject{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.email-item .ei-snippet{color:#888;font-weight:400;font-size:13px;flex:2;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.email-item .ei-date{color:#999;font-size:12px;flex-shrink:0;white-space:nowrap}.empty-state{text-align:center;padding:60px 20px;color:#999}.empty-state .icon{font-size:48px;margin-bottom:12px}.pagination{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:20px;font-size:14px}.email-detail{background:#fff;border-radius:8px;padding:24px 28px;box-shadow:0 1px 3px #00000014}.email-detail .ed-header{border-bottom:1px solid #eee;padding-bottom:16px;margin-bottom:20px}.email-detail .ed-subject{font-size:22px;font-weight:700;margin-bottom:12px;word-break:break-all}.email-detail .ed-meta{font-size:13px;color:#666;line-height:1.8}.email-detail .ed-meta strong{color:#333}.email-detail .ed-body{font-size:15px;line-height:1.8;word-break:break-word}.email-detail .ed-body pre{white-space:pre-wrap;font-family:inherit}.ed-actions{display:flex;gap:8px;margin-bottom:20px}.compose{background:#fff;border-radius:8px;padding:24px 28px;box-shadow:0 1px 3px #00000014}.compose h2{margin-bottom:20px;font-size:20px}.form-group{margin-bottom:14px}.form-group label{display:block;font-size:13px;font-weight:600;color:#555;margin-bottom:4px}.form-group input,.form-group textarea{width:100%;padding:10px 12px;border:1px solid #d0d0d0;border-radius:6px;font-size:14px;font-family:inherit;transition:border-color .15s}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:#2563eb;box-shadow:0 0 0 3px #2563eb1a}.form-group textarea{resize:vertical;min-height:260px}.spinner{display:inline-block;width:20px;height:20px;border:2px solid #e0e0e0;border-top-color:#2563eb;border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.toast{position:fixed;top:20px;right:20px;z-index:999;padding:12px 20px;border-radius:6px;font-size:14px;color:#fff;animation:fadeIn .25s}.toast.success{background:#16a34a}.toast.error{background:#dc2626}@keyframes fadeIn{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.loading-mask{display:flex;align-items:center;justify-content:center;padding:40px;gap:10px;color:#888}