:root{--bg:#f6f8fc;--surface:#fff;--primary:#0b57d0;--primary-hover:#0842a0;--primary-container:#d3e3fd;--on-primary-container:#041e49;--compose-bg:#c2e7ff;--compose-color:#001d35;--text-main:#1f1f1f;--text-muted:#5f6368;--border-light:#e0e2ec;--border-row:#f2f2f2;--star-active:#e37400;--star-inactive:#c4c7c5}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}body{background-color:var(--bg);color:var(--text-main);-webkit-user-select:none;user-select:none;height:100vh;font-family:Open Sans,-apple-system,BlinkMacSystemFont,Roboto,sans-serif;overflow:hidden}.app-header{background:var(--bg);border-bottom:1px solid #0000000a;flex-shrink:0;align-items:center;gap:12px;height:64px;padding:0 16px;display:flex}.icon-btn{cursor:pointer;width:40px;height:40px;color:var(--text-muted);background:0 0;border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;transition:background .15s,color .15s;display:inline-flex}.icon-btn:hover{color:var(--text-main);background:#eaebef}.brand-logo{color:var(--text-main);cursor:pointer;align-items:center;gap:10px;font-size:18px;font-weight:600;text-decoration:none;display:flex}.brand-icon{width:32px;height:32px;color:var(--primary);background:#fff;border-radius:8px;justify-content:center;align-items:center;display:flex;box-shadow:0 1px 3px #0000001a}.search-box{flex:1;align-items:center;max-width:720px;display:flex;position:relative}.search-input{width:100%;height:46px;color:var(--text-main);background:#eaf1fb;border:1px solid #0000;border-radius:23px;outline:none;padding:0 44px;font-family:inherit;font-size:15px;transition:background .2s,box-shadow .2s}.search-input:focus{background:#fff;border-color:#d3e3fd;box-shadow:0 1px 4px #0000002e}.search-icon-left{color:var(--text-muted);pointer-events:none;position:absolute;left:14px}.header-right{align-items:center;gap:12px;margin-left:auto;display:flex;position:relative}.account-pill{border:1px solid var(--border-light);cursor:pointer;color:var(--text-main);background:#fff;border-radius:20px;align-items:center;gap:8px;padding:4px 12px 4px 6px;font-size:13px;font-weight:500;transition:box-shadow .15s;display:flex}.account-pill:hover{box-shadow:0 1px 3px #0000001a}.avatar{background:var(--primary);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:28px;height:28px;font-size:13px;font-weight:600;display:flex}.dropdown-card{border:1px solid var(--border-light);z-index:500;background:#fff;border-radius:12px;flex-direction:column;width:260px;padding:8px 0;display:flex;position:absolute;top:48px;right:0;box-shadow:0 4px 20px #00000026}.dropdown-user-header{border-bottom:1px solid var(--border-row);text-align:center;padding:10px 16px}.dropdown-opt{color:var(--text-main);cursor:pointer;align-items:center;gap:10px;padding:10px 16px;font-size:13px;transition:background .15s;display:flex}.dropdown-opt:hover{background:#f6f8fc}.app-layout{height:calc(100vh - 64px);display:flex;overflow:hidden}.app-sidebar{flex-direction:column;flex-shrink:0;gap:4px;width:256px;padding:8px 12px 16px;transition:transform .25s;display:flex}.compose-button{background:var(--compose-bg);color:var(--compose-color);cursor:pointer;border:none;border-radius:16px;align-items:center;gap:12px;height:56px;margin-bottom:12px;padding:0 24px;font-size:14px;font-weight:600;transition:background .15s,box-shadow .15s;display:inline-flex;box-shadow:0 1px 3px #0000001a}.compose-button:hover{background:#b3defa;box-shadow:0 2px 6px #00000026}.nav-link{height:40px;color:var(--text-muted);cursor:pointer;border-radius:20px;align-items:center;gap:16px;padding:0 16px;font-size:14px;font-weight:500;transition:background .15s,color .15s;display:flex}.nav-link:hover{color:var(--text-main);background:#eaebef}.nav-link.active{background:var(--primary-container);color:var(--on-primary-container);font-weight:700}.nav-badge{margin-left:auto;font-size:12px;font-weight:700}.routing-card{border:1px solid var(--border-light);background:#fff;border-radius:12px;flex-direction:column;gap:4px;margin-top:auto;padding:12px 14px;font-size:12px;display:flex}.main-surface{background:var(--surface);border-radius:16px 16px 0 0;flex-direction:column;flex:1;margin-right:16px;display:flex;overflow:hidden;box-shadow:0 1px 3px #0000000a}.toolbar{border-bottom:1px solid var(--border-row);height:48px;color:var(--text-muted);flex-shrink:0;align-items:center;gap:12px;padding:0 16px;font-size:13px;display:flex}.toolbar-sep{background:var(--border-light);width:1px;height:20px}.toolbar-spacer{flex:1}.email-list{-webkit-overflow-scrolling:touch;flex:1;overflow-y:auto}.email-row{border-bottom:1px solid var(--border-row);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;height:44px;padding:0 16px;font-size:14px;transition:background .1s,box-shadow .1s;display:flex}.email-row:hover{background:#f2f6fc;box-shadow:inset 1px 0 #dadce0,inset -1px 0 #dadce0}.email-row.read{color:var(--text-muted);background:#f8fafd}.email-row.unread{color:var(--text-main);background:#fff;font-weight:600}.col-actions{flex-shrink:0;align-items:center;gap:8px;width:64px;display:flex}.star-btn{cursor:pointer;color:var(--star-inactive);background:0 0;border:none;align-items:center;transition:color .15s,transform .1s;display:flex}.star-btn:hover{color:var(--text-muted)}.star-btn.starred{color:var(--star-active)}.col-sender{text-overflow:ellipsis;white-space:nowrap;flex-shrink:0;width:190px;padding-right:12px;font-size:14px;overflow:hidden}.col-content{white-space:nowrap;text-overflow:ellipsis;flex:1;align-items:center;gap:6px;min-width:0;font-size:14px;display:flex;overflow:hidden}.badge-alias{color:var(--primary);background:#e8f0fe;border-radius:4px;flex-shrink:0;padding:2px 6px;font-size:11px;font-weight:700}.subject-text{text-overflow:ellipsis;white-space:nowrap;flex-shrink:0;max-width:40%;overflow:hidden}.snippet-text{color:var(--text-muted);text-overflow:ellipsis;white-space:nowrap;flex:1;font-weight:400;overflow:hidden}.col-date{text-align:right;width:85px;color:var(--text-muted);white-space:nowrap;flex-shrink:0;font-size:12px}.detail-view{flex-direction:column;flex:1;display:flex;overflow:hidden}.detail-scroll{-webkit-overflow-scrolling:touch;flex:1;padding:24px 32px;overflow-y:auto}.detail-subject{color:var(--text-main);word-break:break-word;margin-bottom:24px;font-size:22px;font-weight:500;line-height:1.3}.detail-sender-row{align-items:flex-start;gap:16px;margin-bottom:24px;display:flex}.detail-avatar{background:var(--primary);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:16px;font-weight:600;display:flex}.detail-meta-box{flex:1;min-width:0}.detail-from-name{color:var(--text-main);font-size:15px;font-weight:700}.detail-from-email{color:var(--text-muted);margin-left:6px;font-size:13px}.detail-to-line{color:var(--text-muted);margin-top:4px;font-size:12px}.detail-date-box{color:var(--text-muted);white-space:nowrap;font-size:12px}.detail-iframe-container{border-top:1px solid var(--border-row);min-height:350px;padding-top:20px}.detail-iframe{background:#fff;border:none;width:100%;min-height:350px}.detail-reply-bar{gap:12px;margin-top:32px;display:flex}.outline-pill-btn{height:38px;color:var(--text-main);cursor:pointer;background:0 0;border:1px solid #747775;border-radius:19px;align-items:center;gap:8px;padding:0 20px;font-size:14px;font-weight:500;transition:background .15s,border-color .15s;display:inline-flex}.outline-pill-btn:hover{border-color:var(--text-main);background:#f2f6fc}.compose-window{z-index:300;background:#fff;border:1px solid #dadce0;border-radius:12px 12px 0 0;flex-direction:column;width:520px;height:500px;transition:height .2s,width .2s;display:flex;position:fixed;bottom:0;right:32px;overflow:hidden;box-shadow:0 8px 24px #0000002e}.compose-window.minimized{height:40px}.compose-window.fullscreen{border-radius:12px;width:90vw;height:85vh;bottom:5vh;right:5vw}.compose-header{color:#041e49;background:#f2f6fc;flex-shrink:0;align-items:center;height:40px;padding:0 14px;font-size:14px;font-weight:600;display:flex}.compose-header-actions{align-items:center;gap:4px;margin-left:auto;display:flex}.compose-field{border-bottom:1px solid var(--border-row);align-items:center;gap:10px;padding:8px 14px;font-size:14px;display:flex}.compose-label{color:var(--text-muted);width:55px;font-size:13px}.compose-input{color:var(--text-main);border:none;outline:none;flex:1;font-family:inherit;font-size:14px}.compose-body{resize:none;color:var(--text-main);border:none;outline:none;flex:1;padding:14px;font-family:inherit;font-size:14px;line-height:1.5}.compose-footer{border-top:1px solid var(--border-row);flex-shrink:0;align-items:center;gap:12px;height:52px;padding:0 14px;display:flex}.btn-send-primary{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:18px;align-items:center;gap:8px;height:36px;padding:0 24px;font-size:14px;font-weight:600;transition:background .15s;display:inline-flex}.btn-send-primary:hover{background:var(--primary-hover)}.empty-placeholder{height:100%;color:var(--text-muted);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:40px;display:flex}@media (width<=768px){.app-sidebar{background:var(--bg);z-index:200;position:fixed;top:64px;bottom:0;left:0;transform:translate(-100%);box-shadow:4px 0 16px #0000001a}.app-sidebar.open{transform:translate(0)}.drawer-overlay{z-index:150;background:#0006;position:fixed;inset:64px 0 0}.main-surface{border-radius:0;margin-right:0}.search-box{max-width:none}.account-pill span{display:none}.compose-window{border-radius:0;width:100vw;height:100vh;right:0}.email-row{flex-wrap:wrap;gap:4px;height:auto;padding:10px 14px}.col-actions{width:auto}.col-sender{flex:1;width:auto;padding-right:0}.col-date{width:auto;font-size:11px}.col-content{width:100%;margin-top:4px}.subject-text{max-width:60%}}