*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Inter,sans-serif}.app-container{--bg: #ffffff;--bg-secondary: #f8f9fa;--bg-hover: #f1f3f5;--bg-active: #e8f0fe;--border: #e9ecef;--text-primary: #1a1a2e;--text-secondary: #6c757d;--text-muted: #adb5bd;--accent: #5b6abf;--accent-light: #eef0ff;--shadow-sm: 0 1px 2px rgba(0,0,0,.04);--shadow-md: 0 2px 8px rgba(0,0,0,.06);--radius: 8px;--radius-lg: 12px;min-height:100vh;display:flex;flex-direction:column;background:var(--bg);color:var(--text-primary);transition:background .2s,color .2s}.app-container.dark{--bg: #16161a;--bg-secondary: #1e1e24;--bg-hover: #26262e;--bg-active: #2a2d42;--border: #2e2e38;--text-primary: #e4e4e7;--text-secondary: #8b8b9a;--text-muted: #52525b;--accent: #818cf8;--accent-light: #1e1b4b;--shadow-sm: 0 1px 2px rgba(0,0,0,.2);--shadow-md: 0 2px 8px rgba(0,0,0,.3)}.app-header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;border-bottom:1px solid var(--border);background:var(--bg);position:sticky;top:0;z-index:10}.header-left{display:flex;align-items:center;gap:10px}.logo-mark{width:28px;height:28px;border-radius:7px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}.header-title{font-size:15px;font-weight:600;letter-spacing:-.3px}.mail-count{font-size:11px;color:var(--text-muted);background:var(--bg-secondary);padding:2px 7px;border-radius:10px;font-weight:500}.header-actions{display:flex;align-items:center;gap:4px}.icon-btn{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:6px;border-radius:6px;display:flex;align-items:center;justify-content:center;transition:all .15s}.icon-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.icon-btn:disabled{opacity:.3;cursor:not-allowed}.icon-btn:disabled:hover{background:none}.icon-btn.small{padding:4px}.icon-btn.spinning{animation:spin .8s linear 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.text-btn.danger:hover{background:#2d1b1b;color:#fc8181}.select-toolbar{display:flex;align-items:center;gap:12px;padding:6px 16px;border-bottom:1px solid var(--border);background:var(--bg-secondary);flex-shrink:0}.select-all-check{display:flex;align-items:center;gap:6px;cursor:pointer;font-size:12px;font-weight:500;color:var(--text-secondary);user-select:none}.select-all-check input{width:15px;height:15px;cursor:pointer;accent-color:var(--accent)}.select-count{font-size:12px;color:var(--text-muted);font-weight:500}.select-actions{margin-left:auto;display:flex;align-items:center;gap:4px}.search-bar{padding:8px 20px;border-bottom:1px solid var(--border)}.search-input-wrap{display:flex;align-items:center;gap:8px;background:var(--bg-secondary);border-radius:var(--radius);padding:0 12px;transition:box-shadow .15s}.search-input-wrap:focus-within{box-shadow:0 0 0 2px var(--accent)}.search-icon{color:var(--text-muted);flex-shrink:0}.search-input{flex:1;border:none;background:none;padding:9px 0;font-size:13px;color:var(--text-primary);outline:none;font-family:inherit}.search-input::placeholder{color:var(--text-muted)}.search-clear{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:18px;padding:0 2px;line-height:1}.search-clear:hover{color:var(--text-primary)}.main-content{display:flex;flex:1;overflow:hidden;position:relative}.mail-list-panel{width:380px;min-width:300px;max-width:480px;border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.mail-list-scroll{flex:1;overflow-y:auto;padding:4px 0}.mail-item{display:flex;align-items:flex-start;gap:12px;padding:12px 16px;cursor:pointer;transition:background .1s;border-bottom:1px solid var(--border)}.mail-item:hover{background:var(--bg-hover)}.mail-item.active{background:var(--bg-active)}.mail-item-dot{width:8px;height:8px;border-radius:50%;background:var(--text-muted);flex-shrink:0;margin-top:6px;opacity:.4;transition:all .15s}.mail-item-dot.active{background:var(--accent);opacity:1}.mail-checkbox{width:16px;height:16px;cursor:pointer;accent-color:var(--accent);flex-shrink:0;margin-top:4px}.mail-item.selected{background:var(--accent-light)}.mail-item-content{flex:1;min-width:0}.mail-item-header{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:2px}.mail-item-sender{font-size:13px;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mail-item-time{font-size:11px;color:var(--text-muted);white-space:nowrap;margin-left:8px;flex-shrink:0}.mail-item-subject{font-size:13px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.4}.mail-item-to{font-size:11px;color:var(--text-muted);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.to-label{color:var(--text-muted);font-style:italic}.pagination-bar{padding:8px 16px;border-top:1px solid var(--border);display:flex;justify-content:center;flex-shrink:0}.mail-detail-panel{flex:1;display:flex;flex-direction:column;overflow:hidden;min-width:0}.detail-toolbar{display:flex;align-items:center;justify-content:space-between;padding:8px 20px;border-bottom:1px solid var(--border);flex-shrink:0}.detail-nav{display:flex;gap:2px}.detail-scroll{flex:1;overflow-y:auto;padding:24px 28px}.detail-subject{font-size:22px;font-weight:700;line-height:1.3;margin:0 0 20px;letter-spacing:-.4px;color:var(--text-primary)}.detail-meta{display:flex;flex-direction:column;gap:6px;padding:14px 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var(--border);padding-top:20px}.text-body{white-space:pre-wrap;word-break:break-word;font-size:14px;line-height:1.6;color:var(--text-secondary);margin:0;font-family:inherit}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;min-height:200px;color:var(--text-muted);gap:12px}.empty-state p{margin:0;font-size:14px}.empty-icon{opacity:.3}.loading-overlay{position:absolute;top:8px;left:50%;transform:translate(-50%);background:var(--bg);padding:6px 16px;border-radius:20px;box-shadow:var(--shadow-md);z-index:5;border:1px solid var(--border)}.mobile-list{width:100%;overflow-y:auto;height:100%}.mobile-detail{display:flex;flex-direction:column;height:100%}.drawer-title{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:calc(100vw - 80px)}.mail-list-scroll::-webkit-scrollbar,.detail-scroll::-webkit-scrollbar,.mobile-list::-webkit-scrollbar{width:4px}.mail-list-scroll::-webkit-scrollbar-track,.detail-scroll::-webkit-scrollbar-track,.mobile-list::-webkit-scrollbar-track{background:transparent}.mail-list-scroll::-webkit-scrollbar-thumb,.detail-scroll::-webkit-scrollbar-thumb,.mobile-list::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}@media(max-width:768px){.main-content{flex:1;min-height:0}.mail-item{padding:12px 16px}.detail-scroll{padding:16px}.detail-subject{font-size:18px}}