:root{--bg-primary: #ffffff;--bg-secondary: #f6f8fa;--bg-tertiary: #eef1f5;--bg-hover: #f0f4f8;--bg-active: #e2e8f0;--text-primary: #1a1a2e;--text-secondary: #5f6368;--text-tertiary: #9aa0a6;--border: #e0e4e8;--accent: #1a73e8;--accent-hover: #1557b0;--accent-light: #e8f0fe;--danger: #d93025;--danger-light: #fce8e6;--success: #188038;--success-light: #e6f4ea;--shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);--shadow-lg: 0 4px 12px rgba(0,0,0,.1);--sidebar-width: 256px;--topbar-height: 64px;--radius: 8px;--radius-lg: 12px;--transition: .2s ease}[data-theme=dark]{--bg-primary: #1a1a2e;--bg-secondary: #16213e;--bg-tertiary: #0f3460;--bg-hover: #1a2744;--bg-active: #233554;--text-primary: #e8eaed;--text-secondary: #9aa0a6;--text-tertiary: #5f6368;--border: #2d3748;--accent: #8ab4f8;--accent-hover: #aec7fa;--accent-light: #1a2744;--shadow: 0 1px 3px rgba(0,0,0,.3);--shadow-lg: 0 4px 12px rgba(0,0,0,.4)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg-secondary);padding:20px}.auth-card{background:var(--bg-primary);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:40px;width:100%;max-width:420px}.auth-card h1{font-size:24px;font-weight:600;margin-bottom:4px}.auth-card p{color:var(--text-secondary);margin-bottom:24px;font-size:14px}.auth-card form{display:flex;flex-direction:column;gap:16px}.auth-card label{font-size:13px;font-weight:500;color:var(--text-primary)}.auth-card input{padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;background:var(--bg-primary);color:var(--text-primary);outline:none;transition:border var(--transition)}.auth-card input:focus{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-light)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border:none;border-radius:var(--radius);font-size:14px;font-weight:500;cursor:pointer;transition:all var(--transition);text-decoration:none}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-danger{background:var(--danger-light);color:var(--danger)}.btn-danger:hover{background:var(--danger);color:#fff}.btn-sm{padding:6px 12px;font-size:12px}.auth-toggle{margin-top:20px;text-align:center;font-size:13px;color:var(--text-secondary)}.auth-toggle button{background:none;border:none;color:var(--accent);cursor:pointer;font-size:13px;font-weight:500}.auth-error{background:var(--danger-light);color:var(--danger);padding:10px 14px;border-radius:var(--radius);font-size:13px;margin-bottom:8px}.app-layout{height:100vh;display:flex;flex-direction:column}.topbar{height:var(--topbar-height);border-bottom:1px solid var(--border);background:var(--bg-primary);display:flex;align-items:center;padding:0 20px;gap:16px;flex-shrink:0}.topbar-logo{font-size:18px;font-weight:600;white-space:nowrap;width:var(--sidebar-width);padding-left:4px}.topbar-search{flex:1;max-width:480px;position:relative}.topbar-search input{width:100%;padding:9px 14px 9px 40px;border:1px solid var(--border);border-radius:24px;font-size:14px;background:var(--bg-secondary);color:var(--text-primary);outline:none;transition:all var(--transition)}.topbar-search input:focus{background:var(--bg-primary);border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-light)}.topbar-search svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-tertiary)}.topbar-actions{display:flex;align-items:center;gap:8px;margin-left:auto}.main-container{display:flex;flex:1;overflow:hidden}.sidebar{width:var(--sidebar-width);background:var(--bg-secondary);border-right:1px solid var(--border);padding:8px;display:flex;flex-direction:column;gap:2px;flex-shrink:0;overflow-y:auto}.sidebar-item{display:flex;align-items:center;gap:12px;padding:10px 16px;border-radius:16px;cursor:pointer;color:var(--text-primary);font-size:14px;transition:all var(--transition);border:none;background:none;width:100%;text-align:left}.sidebar-item:hover{background:var(--bg-hover)}.sidebar-item.active{background:var(--accent-light);color:var(--accent);font-weight:600}.sidebar-item .badge{margin-left:auto;background:var(--accent);color:#fff;font-size:11px;padding:2px 8px;border-radius:12px;font-weight:600}.sidebar-section{padding:12px 16px 4px;font-size:11px;font-weight:600;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.8px}.sidebar-category{display:flex;align-items:center;gap:12px;padding:8px 16px 8px 28px;border-radius:16px;cursor:pointer;color:var(--text-secondary);font-size:13px;transition:all var(--transition);border:none;background:none;width:100%;text-align:left}.sidebar-category:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar-category.active{color:var(--accent);font-weight:500}.category-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}.email-content{flex:1;display:flex;overflow:hidden}.email-list{width:400px;flex-shrink:0;overflow-y:auto;border-right:1px solid var(--border);background:var(--bg-primary)}.email-list-header{padding:16px 20px 8px;font-size:13px;color:var(--text-secondary);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.email-card{padding:16px 20px;cursor:pointer;border-bottom:1px solid var(--border);transition:background var(--transition);position:relative}.email-card:hover{background:var(--bg-hover)}.email-card.active{background:var(--accent-light)}.email-card.unread{background:var(--bg-secondary)}.email-card.unread .email-subject{font-weight:600}.email-sender{font-size:13px;font-weight:600;margin-bottom:4px;display:flex;align-items:center;gap:8px}.email-sender .category-tag{font-size:10px;padding:1px 6px;border-radius:4px;font-weight:500;background:var(--bg-tertiary);color:var(--text-secondary)}.email-subject{font-size:14px;margin-bottom:4px;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.email-preview{font-size:13px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.email-time{font-size:11px;color:var(--text-tertiary);position:absolute;top:16px;right:20px}.read-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex-shrink:0}.read-dot.hidden{visibility:hidden}.preview-panel{flex:1;overflow-y:auto;background:var(--bg-primary)}.preview-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-tertiary);gap:12px}.preview-empty svg{width:64px;height:64px;opacity:.4}.preview-header{padding:24px 32px;border-bottom:1px solid var(--border)}.preview-subject{font-size:20px;font-weight:600;margin-bottom:12px}.preview-meta{display:flex;align-items:center;gap:12px;font-size:13px}.preview-sender{font-weight:600}.preview-meta-secondary{color:var(--text-tertiary)}.preview-body{padding:24px 32px;font-size:14px;line-height:1.6;white-space:pre-wrap}.preview-body p{margin-bottom:12px}.preview-footer{padding:24px 32px;border-top:1px solid var(--border);display:flex;gap:8px}.generated-notice{font-size:11px;color:var(--text-tertiary);padding:24px 32px;font-style:italic}.toast-container{position:fixed;top:16px;right:16px;z-index:1000;display:flex;flex-direction:column;gap:8px}.toast{padding:12px 20px;border-radius:var(--radius);box-shadow:var(--shadow-lg);font-size:14px;animation:slideIn .3s ease;display:flex;align-items:center;gap:10px;max-width:360px}.toast.success{background:var(--success-light);color:var(--success);border:1px solid var(--success)}.toast.error{background:var(--danger-light);color:var(--danger);border:1px solid var(--danger)}.toast.info{background:var(--accent-light);color:var(--accent);border:1px solid var(--accent)}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}.skeleton{background:linear-gradient(90deg,var(--bg-tertiary) 25%,var(--bg-hover) 50%,var(--bg-tertiary) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:var(--radius)}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-line{height:14px;margin-bottom:8px}.skeleton-line-sm{width:60%}.skeleton-line-xs{width:40%}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;color:var(--text-tertiary);gap:12px;text-align:center}.empty-state h3{font-size:16px;color:var(--text-primary)}.empty-state p{font-size:13px;max-width:280px}.email-card-enter{animation:cardEnter .4s ease}@keyframes cardEnter{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.spinner{width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .6s linear infinite}.spinner-lg{width:32px;height:32px;border-width:3px}@keyframes spin{to{transform:rotate(360deg)}}.loading-more{display:flex;align-items:center;justify-content:center;padding:20px;color:var(--text-tertiary);font-size:13px;gap:8px}.theme-toggle{background:none;border:1px solid var(--border);border-radius:50%;width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text-secondary);transition:all var(--transition);font-size:16px}.theme-toggle:hover{background:var(--bg-hover);color:var(--text-primary)}@media(max-width:768px){.sidebar{width:60px;padding:4px}.sidebar-item span,.sidebar-section,.sidebar-category span{display:none}.sidebar-item{justify-content:center;padding:10px;border-radius:12px}.sidebar-category{justify-content:center;padding:8px}.topbar-logo{width:auto;font-size:16px}.email-list{width:100%;border-right:none}.email-content{flex-direction:column}.preview-panel{display:none}.preview-panel.open{display:block;position:fixed;top:0;right:0;bottom:0;left:0;z-index:100}.preview-panel.open .preview-back{display:flex}}.preview-back{display:none;align-items:center;gap:8px;padding:12px 16px;background:none;border:none;color:var(--accent);font-size:14px;cursor:pointer}