:root{--ink:#172033;--muted:#71809a;--line:#e8edf5;--brand:#5b5ce2;--brand-soft:#eeefff;--surface:#fff;--canvas:#f6f8fc}*{box-sizing:border-box}body{margin:0;background:var(--canvas);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;font-size:14px}.topbar{height:68px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:42px;padding:0 28px;position:sticky;top:0;z-index:10}.brand{font-weight:800;font-size:20px;color:var(--ink);text-decoration:none;letter-spacing:-.5px;white-space:nowrap}.brand span{color:var(--brand)}.global-search{display:flex;align-items:center;gap:9px;max-width:520px;flex:1;background:#f5f6fa;border-radius:9px;padding:0 14px;color:#97a1b5}.global-search input,.search-field input{border:0;outline:0;background:transparent;width:100%;height:38px;color:var(--ink)}.top-actions{display:flex;align-items:center;gap:7px}.top-actions button,.icon-button,.detail-toolbar button{border:0;background:transparent;color:#61708a;width:34px;height:34px;border-radius:8px;font-size:18px}.top-actions button:hover,.icon-button:hover,.detail-toolbar button:hover{background:#f0f2f8;color:var(--brand)}.admin-avatar,.avatar{display:inline-grid;place-items:center;border-radius:50%;font-weight:700}.admin-avatar{width:34px;height:34px;background:#1e2947;color:#fff;font-size:11px;margin-left:5px}.mail-shell{height:calc(100vh - 68px);display:flex;overflow:hidden;padding:16px;gap:0}.panel{background:var(--surface);border:1px solid var(--line);min-width:210px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 5px 20px rgba(23,32,51,.035)}.users-panel{width:28%;border-radius:12px 0 0 12px}.inbox-panel{width:40%}.detail-panel{flex:1;border-radius:0 12px 12px 0}.resize-handle{width:7px;cursor:col-resize;position:relative;z-index:3}.resize-handle:after{content:"";position:absolute;width:1px;top:16px;bottom:16px;left:3px;background:#e3e8f1}.panel-heading{display:flex;justify-content:space-between;align-items:center;padding:20px 20px 12px}.panel-heading h2{font-size:19px;line-height:1.1;margin:2px 0 0;font-weight:750}.eyebrow{display:block;text-transform:uppercase;letter-spacing:1px;color:#97a1b5;font-size:10px;font-weight:700}.search-field{margin:0 15px 12px;background:#f6f7fb;border-radius:7px;padding:0 10px;display:flex;align-items:center;color:#97a1b5}.user-list,.email-list{overflow-y:auto}.user-item,.email-row{width:100%;border:0;background:#fff;text-align:left;display:flex;position:relative;gap:10px;padding:12px 16px;align-items:center;border-left:3px solid transparent;transition:.18s}.user-item:hover,.email-row:hover{background:#f8f9fd}.user-item.active{background:var(--brand-soft);border-left-color:var(--brand)}.avatar{width:38px;height:38px;flex:0 0 38px;font-size:14px}.avatar-user{background:#ecebff;color:#5352c9}.avatar-mail{background:#e9f5ff;color:#3075b7}.presence{position:absolute;width:10px;height:10px;border-radius:50%;border:2px solid #fff;left:44px;top:39px}.presence.online{background:#35b678}.presence.offline{background:#b2bac8}.user-copy{display:flex;min-width:0;flex:1;flex-direction:column;line-height:1.28}.user-copy strong{font-size:13px}.user-copy small,.preview{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;color:var(--muted);font-size:12px}.unread-badge{background:var(--brand);color:#fff;border-radius:11px;padding:2px 7px;font-size:10px;font-weight:700}.content-area{height:100%;overflow:auto}.empty-state{display:grid;place-content:center;text-align:center;color:var(--muted);padding:30px}.empty-state h3{color:var(--ink);font-size:16px;margin:12px 0 3px}.empty-state p{margin:0}.empty-icon{height:44px;width:44px;margin:auto;border-radius:14px;display:grid;place-items:center;color:var(--brand);background:var(--brand-soft);font-size:22px}.inbox-meta{padding:0 18px 10px;display:flex;justify-content:space-between;color:var(--muted);font-size:12px}.inbox-meta strong{color:var(--ink)}.email-row{align-items:flex-start;padding:13px 16px;border-bottom:1px solid #f0f2f6}.email-row.unread{background:#f8f9ff}.email-copy{display:flex;min-width:0;flex:1;flex-direction:column;gap:2px;padding-bottom:30px;}.sender-line{display:flex;justify-content:space-between;gap:8px}.sender-line time{font-size:11px;color:var(--muted)}.subject{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:13px}.email-row.unread .subject,.email-row.unread .sender-line strong{font-weight:800}.email-flags{font-size:14px;color:#9ca6b8;display:flex;gap:6px}.star.active{color:#f2b842}.email-detail{padding:22px 27px;max-width:760px}.detail-toolbar{display:flex;gap:4px;border-bottom:1px solid var(--line);padding-bottom:14px}.detail-toolbar span{flex:1}.email-detail h1{font-size:23px;letter-spacing:-.4px;margin:25px 0}.sender-card{display:flex;gap:12px;align-items:center;padding-bottom:21px;border-bottom:1px solid var(--line)}.sender-card>div{display:flex;flex-direction:column;gap:1px}.sender-card span,.sender-card small{color:var(--muted);font-size:12px}.attachments{display:flex;gap:8px;padding:18px 0}.attachments>span{background:#f4f6fb;border:1px solid var(--line);padding:8px 10px;border-radius:7px;font-size:12px}.attachments small{color:var(--muted)}.message-body{line-height:1.7;padding:8px 0;color:#35415a}.reply-actions{display:flex;gap:8px;margin-top:25px}.reply-actions button{border:1px solid var(--line);background:#fff;border-radius:7px;padding:8px 14px;color:#40506d;font-weight:600}.reply-actions button:hover{border-color:#bfc1ff;background:var(--brand-soft)}@media(max-width:850px){.topbar{gap:15px;padding:0 15px}.global-search{display:none}.mail-shell{padding:8px}.users-panel{width:43%}.inbox-panel{width:57%}.detail-panel,.resize-handle:last-of-type{display:none}}@media(max-width:540px){.mail-shell{height:auto;min-height:calc(100vh - 68px);display:block}.users-panel,.inbox-panel{width:100%;height:360px;border-radius:10px;margin-bottom:10px}.resize-handle{display:none}.top-actions button{display:none}}