:root{--bg-dark:#f9fafb;--bg-panel:#fff;--bg-hover:#f3f4f6;--text-main:#111827;--text-muted:#6b7280;--accent:#059669;--accent-light:#dcfce7;--accent-hover:#047857;--border:#f3f4f6;--border-strong:#e5e7eb;--danger:#ef4444;--success:#10b981;--shadow-sm:0 1px 3px #0000000f, 0 1px 2px #0000000a;--shadow-md:0 4px 12px #00000014;--shadow-lg:0 10px 30px #0000001a;--radius-sm:6px;--radius-md:10px;--radius-lg:14px;--radius-xl:18px;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px);--safe-left:env(safe-area-inset-left,0px);--safe-right:env(safe-area-inset-right,0px);--sidebar-width:280px;--list-pane-width:380px;--bottom-nav-height:64px;--header-height:56px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%}html,body{background-color:var(--bg-dark);color:var(--text-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overscroll-behavior:none;width:100%;height:100%;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}body{overflow:hidden}.app-container{width:100vw;height:100dvh;display:flex;position:relative;overflow:hidden}.auth-page-container{min-height:100dvh;padding:24px 20px;padding-bottom:calc(24px + var(--safe-bottom));-webkit-overflow-scrolling:touch;background:linear-gradient(135deg,#f8faff 0%,#eef2f7 50%,#f0faf6 100%);justify-content:center;align-items:center;display:flex;overflow-y:auto}.auth-card{background:var(--bg-panel);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);text-align:center;border:1px solid var(--border-strong);width:100%;max-width:420px;margin:auto;padding:44px 40px}.auth-icon-wrap{background-color:#10b9811a;border-radius:50%;justify-content:center;align-items:center;width:68px;height:68px;margin:0 auto 22px;display:flex}.sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);background-color:var(--bg-panel);border-right:1px solid var(--border-strong);z-index:10;flex-direction:column;flex-shrink:0;height:100%;transition:transform .25s cubic-bezier(.4,0,.2,1);display:flex;overflow:hidden}.sidebar-header{height:var(--header-height);border-bottom:1px solid var(--border);color:var(--text-main);letter-spacing:-.01em;flex-shrink:0;align-items:center;gap:10px;padding:0 20px;font-size:1.05rem;font-weight:700;display:flex}.sidebar-content{-webkit-overflow-scrolling:touch;flex:1;padding:14px 10px;overflow:hidden auto}.account-item{border-radius:var(--radius-md);cursor:pointer;justify-content:space-between;align-items:center;gap:4px;min-height:44px;margin-bottom:3px;padding:10px 12px;transition:all .15s;display:flex}.account-item:hover{background-color:var(--bg-hover)}.account-item.active{background-color:var(--accent-light);border:1px solid #05966933;font-weight:500}.account-info{color:var(--text-main);flex:1;align-items:center;gap:9px;min-width:0;display:flex;overflow:hidden}.account-email{white-space:nowrap;text-overflow:ellipsis;flex:1;min-width:0;font-size:.83rem;overflow:hidden}.remove-btn{color:var(--text-muted);cursor:pointer;border-radius:var(--radius-sm);opacity:.5;background:0 0;border:none;flex-shrink:0;justify-content:center;align-items:center;padding:6px;transition:all .2s;display:flex}.account-item:hover .remove-btn{opacity:1}.remove-btn:hover{color:var(--danger);background-color:#ef444414}.sidebar-footer{border-top:1px solid var(--border-strong);padding:14px;padding-bottom:calc(14px + var(--safe-bottom));flex-direction:column;flex-shrink:0;gap:7px;display:flex}.add-btn{background-color:var(--bg-dark);width:100%;min-height:42px;color:var(--text-main);border:1px solid var(--border-strong);border-radius:var(--radius-md);cursor:pointer;box-shadow:var(--shadow-sm);justify-content:center;align-items:center;gap:8px;padding:10px 14px;font-size:.875rem;font-weight:600;transition:all .2s;display:flex}.add-btn:hover:not(:disabled){border-color:var(--text-muted);background-color:var(--bg-hover);box-shadow:var(--shadow-md);transform:translateY(-1px)}.add-btn:active:not(:disabled){box-shadow:var(--shadow-sm);transform:translateY(0)}.add-btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}.email-list-pane{width:var(--list-pane-width);min-width:var(--list-pane-width);background-color:var(--bg-dark);border-right:1px solid var(--border-strong);flex-direction:column;flex-shrink:0;height:100%;display:flex;overflow:hidden}.list-header{border-bottom:1px solid var(--border);background-color:var(--bg-panel);flex-shrink:0;padding:14px 18px}.list-header h2{letter-spacing:-.02em;color:var(--text-main);font-size:1.05rem;font-weight:700}.search-box{background-color:var(--bg-dark);border:1.5px solid var(--border-strong);border-radius:var(--radius-md);align-items:center;gap:10px;width:100%;padding:10px 14px;transition:all .2s;display:flex}.search-box input{color:var(--text-main);background:0 0;border:none;outline:none;width:100%;font-family:inherit;font-size:16px}.search-box input::placeholder{color:var(--text-muted);font-size:.875rem}.search-box:focus-within{border-color:var(--accent);background-color:var(--bg-panel);box-shadow:0 0 0 2px #0596691a}.emails-container{-webkit-overflow-scrolling:touch;flex:1;overflow:hidden auto}.email-item{border-bottom:1px solid var(--border);cursor:pointer;min-height:72px;padding:15px 18px;transition:all .15s cubic-bezier(.4,0,.2,1)}.email-item:hover{background-color:var(--bg-panel)}.email-item.active{background-color:var(--accent-light);box-shadow:inset 3px 0 0 var(--accent);border-bottom:1px solid #0000}.email-sender{color:var(--text-main);justify-content:space-between;align-items:center;gap:8px;margin-bottom:4px;font-size:.875rem;font-weight:600;display:flex}.email-time{color:var(--text-muted);white-space:nowrap;flex-shrink:0;font-size:.73rem;font-weight:400}.email-subject{color:var(--text-main);white-space:nowrap;text-overflow:ellipsis;margin-bottom:5px;font-size:.86rem;font-weight:500;overflow:hidden}.email-preview{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;font-size:.8rem;line-height:1.4;overflow:hidden}.email-detail-pane{background-color:var(--bg-panel);flex-direction:column;flex:1;min-width:0;height:100%;display:flex;overflow:hidden}.empty-state{color:var(--text-muted);text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:14px;padding:40px 20px;display:flex}.empty-state p{max-width:200px;font-size:.9rem;line-height:1.5}.detail-header{border-bottom:1px solid var(--border);background-color:var(--bg-panel);flex-shrink:0;padding:22px 28px}.detail-subject{letter-spacing:-.02em;color:var(--text-main);word-break:break-word;margin-bottom:16px;font-size:1.35rem;font-weight:700;line-height:1.35}.detail-meta{align-items:center;gap:12px;display:flex}.avatar{background:linear-gradient(135deg, var(--accent), var(--accent-hover));color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:1rem;font-weight:700;display:flex;box-shadow:0 2px 8px #0596694d}.meta-info{flex-direction:column;gap:2px;display:flex;overflow:hidden}.meta-sender{color:var(--text-main);white-space:nowrap;text-overflow:ellipsis;font-size:.92rem;font-weight:600;overflow:hidden}.meta-recipient{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;font-size:.82rem;overflow:hidden}.detail-body{color:var(--text-main);-webkit-overflow-scrolling:touch;word-break:break-word;overflow-wrap:break-word;flex:1;padding:28px;font-size:.94rem;line-height:1.75;overflow:hidden auto}.detail-body *{max-width:100%!important}.detail-body img{display:block;height:auto!important}.detail-body table{-webkit-overflow-scrolling:touch;display:block;overflow-x:auto;width:auto!important}.detail-body pre,.detail-body code{white-space:pre-wrap;word-break:break-all;font-size:.85em}.detail-body a{color:var(--accent);word-break:break-all}.mobile-back-btn{border:1.5px solid var(--border-strong);background-color:var(--bg-hover);color:var(--text-main);border-radius:var(--radius-md);cursor:pointer;-webkit-tap-highlight-color:transparent;align-items:center;gap:6px;width:fit-content;margin-bottom:12px;padding:7px 12px;font-size:.82rem;font-weight:600;transition:all .15s;display:none}.mobile-back-btn:hover,.mobile-back-btn:focus{background-color:var(--border-strong);border-color:var(--text-muted)}.mobile-back-btn:active{transform:scale(.97)}.mobile-tab-bar{background-color:var(--bg-dark);border-bottom:1px solid var(--border);flex-shrink:0;gap:6px;padding:10px 14px;display:none}.mobile-tab-btn{border-radius:var(--radius-sm);border:1.5px solid var(--border-strong);background-color:var(--bg-panel);color:var(--text-muted);cursor:pointer;text-align:center;-webkit-tap-highlight-color:transparent;flex:1;padding:9px 10px;font-size:.8rem;font-weight:600;transition:all .15s}.mobile-tab-btn.active{background-color:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 2px 8px #05966940}.modal-overlay{z-index:1000;-webkit-backdrop-filter:blur(3px);background-color:#00000073;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.modal-content{background-color:var(--bg-panel);border-radius:var(--radius-xl);width:100%;max-width:440px;box-shadow:var(--shadow-lg);border:1px solid var(--border-strong);-webkit-overflow-scrolling:touch;max-height:calc(100dvh - 32px);padding:26px;animation:.22s cubic-bezier(.34,1.56,.64,1) slideUp;overflow-y:auto}@keyframes slideUp{0%{opacity:0;transform:translateY(16px)scale(.97)}to{opacity:1;transform:translateY(0)scale(1)}}.modal-title{letter-spacing:-.01em;margin-bottom:20px;font-size:1.1rem;font-weight:700}.input-group{margin-bottom:18px}.input-group label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.03em;margin-bottom:7px;font-size:.82rem;font-weight:600;display:block}.input-group input{border-radius:var(--radius-md);border:1.5px solid var(--border-strong);background-color:var(--bg-dark);width:100%;color:var(--text-main);outline:none;padding:12px 14px;font-family:inherit;font-size:16px;transition:border-color .2s,box-shadow .2s}.input-group input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #0596691a}.modal-actions{flex-wrap:wrap;justify-content:flex-end;gap:10px;display:flex}.btn{border-radius:var(--radius-md);cursor:pointer;-webkit-tap-highlight-color:transparent;border:none;min-height:42px;padding:10px 20px;font-family:inherit;font-size:.9rem;font-weight:600;transition:all .2s}.btn-cancel{color:var(--text-muted);border:1.5px solid var(--border-strong);background-color:#0000}.btn-cancel:hover{color:var(--text-main);background-color:var(--bg-hover)}.btn-primary{background-color:var(--accent);color:#fff;box-shadow:0 2px 8px #0596694d}.btn-primary:hover{background-color:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 12px #05966966}.btn-primary:active{transform:translateY(0)}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:10px}::-webkit-scrollbar-thumb:hover{background:#9ca3af}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.3}}.animate-pulse{animation:2s cubic-bezier(.4,0,.6,1) infinite pulse}@keyframes skeleton-shimmer{0%{background-position:-400px 0}to{background-position:400px 0}}.skeleton-box{border-radius:var(--radius-sm);background:linear-gradient(90deg,#f3f4f6 0%,#10b98114 40%,#f3f4f6 80%) 0 0/800px 100%;animation:1.4s ease-in-out infinite skeleton-shimmer}@media (width<=1280px){:root{--sidebar-width:252px;--list-pane-width:340px}.detail-header{padding:18px 22px}.detail-body{padding:22px}}@media (width<=1023px){:root{--sidebar-width:220px;--list-pane-width:300px}.detail-subject{margin-bottom:14px;font-size:1.2rem}.detail-header{padding:16px 18px}.detail-body{padding:18px}.sidebar-header{font-size:.95rem}.account-email{font-size:.78rem}}@media (width<=768px){:root{--header-height:52px;--bottom-nav-height:60px}.app-container{flex-direction:column;overflow:hidden}.sidebar,.email-list-pane,.email-detail-pane{border-bottom:none;border-right:none;flex-shrink:0;max-width:100%;height:100dvh;position:absolute;top:0;left:0;width:100%!important;min-width:100%!important}.mobile-hidden{display:none!important}.mobile-back-btn{display:inline-flex}.mobile-tab-bar{display:flex}.auth-page-container{padding:20px 16px;padding-bottom:calc(20px + var(--safe-bottom));padding-top:calc(40px + var(--safe-top));align-items:flex-start}.auth-card{border-radius:var(--radius-xl);max-width:100%;padding:32px 22px}.sidebar{border-right:none}.sidebar-header{height:var(--header-height);padding:0 16px;padding-top:var(--safe-top)}.sidebar-content{padding:12px 8px;padding-bottom:calc(var(--bottom-nav-height) + var(--safe-bottom) + 8px)}.sidebar-footer{display:none}.list-header{padding:12px 14px;padding-top:calc(12px + var(--safe-top))}.list-header h2{font-size:.97rem}.account-item{border-radius:var(--radius-md);min-height:52px;margin-bottom:4px;padding:12px 10px}.email-item{padding:13px 14px}.detail-header{padding:12px 14px;padding-top:calc(12px + var(--safe-top))}.detail-subject{margin-bottom:12px;font-size:1.1rem}.detail-body{padding:14px;padding-bottom:calc(20px + var(--safe-bottom));font-size:.9rem}.avatar{width:36px;height:36px;font-size:.9rem}.detail-meta{gap:10px}.meta-sender{font-size:.88rem}.meta-recipient{font-size:.78rem}.modal-overlay{align-items:flex-end;padding:0}.modal-content{border-radius:var(--radius-xl) var(--radius-xl) 0 0;max-width:100%;max-height:90dvh;padding:24px 20px;padding-bottom:calc(24px + var(--safe-bottom));animation:.28s cubic-bezier(.34,1.3,.64,1) slideUpSheet}@keyframes slideUpSheet{0%{opacity:.8;transform:translateY(100%)}to{opacity:1;transform:translateY(0)}}.modal-actions{flex-direction:column-reverse}.modal-actions .btn{width:100%}.mobile-back-btn{margin-bottom:10px;font-size:.8rem}::-webkit-scrollbar{display:none}.mobile-bottom-nav{display:flex!important}}.mobile-bottom-nav{height:var(--bottom-nav-height);padding-bottom:var(--safe-bottom);background:var(--bg-panel);border-top:1px solid var(--border-strong);z-index:100;align-items:stretch;display:none;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -4px 16px #0000000f}.mobile-nav-btn{color:var(--text-muted);cursor:pointer;-webkit-tap-highlight-color:transparent;background:0 0;border:none;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:4px;padding:8px 4px;font-family:inherit;font-size:.65rem;font-weight:600;transition:all .15s;display:flex;position:relative}.mobile-nav-btn.active{color:var(--accent)}.mobile-nav-btn.active:before{content:"";background:var(--accent);border-radius:0 0 4px 4px;width:32px;height:3px;position:absolute;top:0;left:50%;transform:translate(-50%)}.mobile-nav-btn:active{transform:scale(.92)}@media (width<=420px){.auth-card{padding:28px 16px}.auth-card h1{font-size:1.3rem!important}.detail-subject{font-size:1rem}.detail-body{padding:12px;padding-bottom:calc(16px + var(--safe-bottom));font-size:.87rem}.mobile-nav-btn{font-size:.6rem}.email-item{padding:12px}.list-header{padding:10px 12px;padding-top:calc(10px + var(--safe-top))}}@media (height<=500px) and (width<=900px){.auth-card{padding:20px 24px}.auth-icon-wrap{width:48px;height:48px;margin-bottom:12px}.auth-card h1{margin-bottom:6px!important;font-size:1.15rem!important}.auth-card p{margin-bottom:14px!important;font-size:.82rem!important}}