:root{--bg-main:#0b0e14;--bg-sidebar:#11141b;--bg-list:#151921;--bg-content:#11141b;--text-primary:#f1f5f9;--text-secondary:#94a3b8;--text-muted:#64748b;--accent:#6366f1;--accent-light:#818cf8;--accent-hover:#4f46e5;--accent-alpha:rgba(99,102,241,.1);--border:hsla(0,0%,100%,.06);--border-focus:rgba(99,102,241,.4);--danger:#f43f5e;--success:#10b981;--warning:#f59e0b;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -2px rgba(0,0,0,.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -4px rgba(0,0,0,.1);--transition:all 0.2s cubic-bezier(0.4,0,0.2,1)}*{box-sizing:border-box;margin:0;padding:0}::-moz-selection{text-shadow:none}::selection{background-color:var(--accent);color:#fff;text-shadow:none}::-moz-selection{background-color:var(--accent);color:#fff}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-main);color:var(--text-primary);line-height:1.5;overflow:hidden;-webkit-font-smoothing:antialiased}button{cursor:pointer;transition:var(--transition);background:none}button,input,select,textarea{border:none;font-family:inherit;color:inherit}input,select,textarea{outline:none}.app-container{display:flex;height:100vh;width:100vw;background-color:var(--bg-main)}.sidebar{width:260px;background-color:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:20px 12px;flex-shrink:0;z-index:10}.sidebar-logo{font-size:1.25rem;font-weight:800;background:linear-gradient(135deg,#818cf8,#6366f1);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:32px;padding-left:12px;letter-spacing:-.02em}.compose-btn{margin:0 8px 24px;padding:12px;background:linear-gradient(135deg,var(--accent-light) 0,var(--accent) 100%);color:#fff;border-radius:var(--radius-lg);font-weight:600;display:flex;align-items:center;justify-content:center;gap:10px;box-shadow:0 10px 15px -3px rgba(99,102,241,.3)}.compose-btn:hover{transform:translateY(-2px);box-shadow:0 12px 20px -3px rgba(99,102,241,.4)}.nav-item{display:flex;align-items:center;padding:10px 12px;border-radius:var(--radius-md);color:var(--text-secondary);text-decoration:none;margin-bottom:4px;font-size:.9375rem;font-weight:500}.nav-item:hover{background-color:hsla(0,0%,100%,.03);color:var(--text-primary)}.nav-item.active{background-color:var(--accent-alpha);color:var(--accent-light)}.nav-item svg{margin-right:12px;opacity:.7}.nav-item.active svg{opacity:1}.message-list-pane{width:380px;background-color:var(--bg-list);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0}.pane-header{height:64px;padding:0 20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.pane-title{font-size:1.125rem;font-weight:700}.search-bar{display:flex;align-items:center;background-color:var(--bg-list);border:1px solid var(--border);border-radius:var(--radius-md);padding:8px 16px;gap:12px;width:100%;max-width:400px;transition:var(--transition)}.search-bar:focus-within{border-color:var(--accent);background-color:hsla(0,0%,100%,.05)}.search-bar input{background:none;font-size:.875rem;width:100%;color:var(--text-primary);border:none;outline:none}.email-list{flex:1;overflow-y:auto}.email-item{padding:16px 20px;border-bottom:1px solid var(--border);cursor:pointer;transition:var(--transition);position:relative}.email-item:hover{background-color:hsla(0,0%,100%,.02)}.email-item.active{background-color:var(--accent-alpha)}.email-item.active:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background-color:var(--accent)}.email-item-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px}.email-item-sender{font-weight:600;font-size:.9375rem;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:70%}.email-item-date{font-size:.75rem;color:var(--text-muted)}.email-item-subject{font-size:.875rem;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:4px}.email-item.unread .email-item-sender,.email-item.unread .email-item-subject{color:#fff;font-weight:700}.email-item-excerpt{font-size:.8125rem;color:var(--text-muted);display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.4}.main-content{overflow-x:hidden}.main-content,.reading-pane{flex:1;display:flex;flex-direction:column;background-color:var(--bg-content)}.reading-pane{overflow:hidden}.reading-pane-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-muted)}.message-header{padding:32px 40px;border-bottom:1px solid var(--border)}.message-subject{font-size:1.75rem;font-weight:800;margin-bottom:24px;letter-spacing:-.02em}.message-meta{display:flex;align-items:flex-start;gap:16px}.avatar{width:44px;height:44px;border-radius:var(--radius-lg);background:linear-gradient(135deg,var(--accent) 0,var(--accent-hover) 100%);display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff;flex-shrink:0}.meta-details{flex:1}.meta-from{font-weight:600;font-size:1rem}.meta-to{font-size:.875rem;color:var(--text-muted)}.message-body{flex:1;padding:40px;overflow-y:auto;font-size:1rem;line-height:1.7;color:#e2e8f0}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:hsla(0,0%,100%,.1);border-radius:10px}::-webkit-scrollbar-thumb:hover{background:hsla(0,0%,100%,.2)}.badge{padding:2px 8px;border-radius:4px;font-size:.75rem;font-weight:700;text-transform:uppercase}.badge-unread{background-color:var(--accent);color:#fff}.rich-content a{color:var(--accent-light);text-decoration:underline}.rich-content img{max-width:100%;border-radius:var(--radius-md)}.modal-overlay{position:fixed;inset:0;background-color:rgba(0,0,0,.8);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background-color:var(--bg-sidebar);border:1px solid var(--border);border-radius:var(--radius-lg);width:90%;max-width:700px;padding:32px;animation:slide-up .3s ease-out}.email-input-group{display:flex;align-items:center;background-color:var(--input-bg);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;transition:all .2s}.email-input-group:focus-within{border-color:var(--accent);box-shadow:0 0 0 2px rgba(99,102,241,.2)}.email-prefix-input{flex:1;background:transparent!important;border:none!important;padding:10px 12px!important;outline:none!important;color:#fff;min-width:0}.email-suffix{padding:10px 16px;background-color:hsla(0,0%,100%,.05);color:var(--text-muted);font-size:.875rem;border-left:1px solid var(--border);-webkit-user-select:none;-moz-user-select:none;user-select:none}@keyframes slide-up{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.btn{padding:10px 24px;border-radius:var(--radius-md);font-weight:600;font-size:.9375rem}.btn-primary{background-color:var(--accent);color:#fff}.btn-primary:hover{background-color:var(--accent-hover)}.btn-secondary{background-color:hsla(0,0%,100%,.05);color:var(--text-primary)}.btn-secondary:hover{background-color:hsla(0,0%,100%,.08)}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-size:.875rem;color:var(--text-muted)}.form-input{width:100%;background-color:rgba(0,0,0,.2);border:1px solid var(--border);border-radius:var(--radius-md);padding:12px;color:#fff}.form-input:focus{border-color:var(--accent)}