:root{--green-dark: #075E54;--green-mid: #128C7E;--green-light: #25D366;--green-pale: #dcf8c6;--bg: #f0f2f5;--white: #ffffff;--text: #111b21;--text-secondary: #667781;--border: #e9edef;--red: #dc3545;--orange: #fd7e14;--blue: #0d6efd;--shadow: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08);--shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);--radius: 10px;--radius-sm: 6px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:Inter,-apple-system,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.5}.app{display:flex;min-height:100vh}.main-content{flex:1;padding:24px 32px;max-width:1100px;width:100%}.sidebar{background:var(--green-dark);width:220px;flex:0 0 220px;display:flex;flex-direction:column;gap:4px;padding:20px 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8px}.sidebar-toggle{display:block}.sidebar-links,.sidebar-user{display:none}.sidebar-links{flex-direction:column;margin-top:10px;padding-top:10px;border-top:1px solid rgba(255,255,255,.15)}.sidebar-user{flex-direction:row;align-items:center;justify-content:space-between;margin-top:10px;padding:10px 10px 0;border-top:1px solid rgba(255,255,255,.15)}.sidebar-open .sidebar-links,.sidebar-open .sidebar-user{display:flex}.sidebar-email{display:inline;font-size:11px}}@media(max-width:600px){.main-content{padding:16px 12px}.grid-2,.grid-3,.datetime-row{grid-template-columns:1fr}.sidebar-title{font-size:14px}.inbox-layout,.contacts-layout{grid-template-columns:1fr;height:auto}}