">
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Source Sans 3',system-ui,sans-serif;background:#FEFCF3;color:#2D3436;line-height:1.6;-webkit-text-size-adjust:100%}
a{color:#1B4332;text-decoration:none;transition:color 0.2s}
a:hover{color:#2D6A4F}
img{max-width:100%;height:auto;display:block}

/* Layout: sidebar + main */
.at-layout{display:flex;min-height:100vh}
.at-sidebar{width:16rem;background:#1B4332;color:#D8F3DC;position:fixed;top:0;left:0;bottom:0;z-index:200;display:flex;flex-direction:column;overflow-y:auto;transition:transform 0.3s ease}
.at-sidebar-header{padding:1.5rem 1.25rem 1rem;border-bottom:1px solid rgba(216,243,220,0.15)}
.at-logo-mono{display:inline-flex;align-items:center;justify-content:center;width:2.75rem;height:2.75rem;background:#D8F3DC;color:#1B4332;font-weight:800;font-size:1.125rem;border-radius:0.375rem;letter-spacing:-0.025em;flex-shrink:0}
.at-logo-text{margin-left:0.75rem;display:flex;flex-direction:column;line-height:1.2}
.at-logo-text span:first-child{font-size:1rem;font-weight:700;color:#F1FAEE}
.at-logo-text span:last-child{font-size:0.6875rem;color:rgba(216,243,220,0.6);font-weight:400;letter-spacing:0.04em;text-transform:uppercase}
.at-logo-link{display:flex;align-items:center;color:inherit}
.at-logo-link:hover{color:inherit}

.at-nav{padding:1.25rem 0;flex:1}
.at-nav-label{padding:0 1.25rem;font-size:0.625rem;font-weight:700;text-transform:uppercase;letter-spacing:0.1em;color:rgba(216,243,220,0.4);margin-bottom:0.5rem}
.at-nav-links{list-style:none;padding:0;margin:0 0 1.5rem}
.at-nav-links li a{display:flex;align-items:center;gap:0.625rem;padding:0.5rem 1.25rem;font-size:0.875rem;font-weight:500;color:rgba(216,243,220,0.75);transition:all 0.15s}
.at-nav-links li a:hover,.at-nav-links li a.at-active{color:#F1FAEE;background:rgba(216,243,220,0.08)}
.at-nav-links li a svg{width:1rem;height:1rem;flex-shrink:0;opacity:0.6}
.at-nav-links li a:hover svg,.at-nav-links li a.at-active svg{opacity:1}

.at-sidebar-footer{padding:1rem 1.25rem;border-top:1px solid rgba(216,243,220,0.15);font-size:0.75rem;color:rgba(216,243,220,0.4)}

/* Hamburger — hidden on desktop, inside topbar on mobile */
.at-hamburger{display:none;background:#1B4332;color:#D8F3DC;border:none;width:2.5rem;height:2.5rem;border-radius:0.375rem;cursor:pointer;align-items:center;justify-content:center;font-size:1.25rem;line-height:1;flex-shrink:0}
.at-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;width:100vw;height:100vh;background:rgba(0,0,0,0.5);z-index:190}

.at-main{margin-left:16rem;flex:1;min-width:0}
.at-topbar{display:none}

/* Mobile: sidebar becomes full-screen overlay */
@media(max-width:64rem){
    .at-sidebar{transform:translateX(-100%);width:75vw !important;max-width:18rem !important}
    .at-sidebar.at-open{transform:translateX(0)}
    .at-hamburger{display:flex}
    .at-overlay.at-open{display:block}
    .at-layout{display:block !important}
    .at-main{margin-left:0 !important;width:100% !important}
    .at-topbar{display:flex;align-items:center;gap:0.75rem;padding:0.75rem 1rem;background:#fff;border-bottom:1px solid #E8E4D9;position:sticky;top:0;z-index:100}
    .at-topbar-logo{font-weight:700;font-size:0.9375rem;color:#1B4332}
    .at-article-wrap{padding-left:1rem !important;padding-right:1rem !important}
}