*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-family:"Inter",system-ui,sans-serif;line-height:1.5;-webkit-text-size-adjust:100%}
body{background:#fff;color:#0f172a;min-height:100vh;display:flex;flex-direction:column}
.dark body{background:#020617;color:#e2e8f0}
a{color:#4f46e5;font-weight:500;text-decoration:none}
a:hover{text-decoration:underline}
.dark a{color:#818cf8}
strong{color:#0f172a;font-weight:600}
.dark strong{color:#f1f5f9}

.header{position:sticky;top:0;z-index:30;border-bottom:1px solid #e2e8f0;background:rgba(255,255,255,0.9);backdrop-filter:blur(8px)}
.dark .header{border-color:#1e293b;background:rgba(2,6,23,0.9)}
.header-inner{max-width:1280px;margin:0 auto;padding:0 1rem;display:flex;align-items:center;height:3.5rem;gap:1rem}
@media(min-width:640px){.header-inner{padding:0 1.5rem}}
.header-home{font-size:.875rem;font-weight:500;color:#64748b;flex-shrink:0}
.header-home:hover{color:#334155}
.dark .header-home{color:#94a3b8}
.dark .header-home:hover{color:#e2e8f0}
.breadcrumb{display:none;align-items:center;gap:.25rem;font-size:.875rem;color:#94a3b8;overflow-x:auto}
@media(min-width:768px){.breadcrumb{display:flex}}
.breadcrumb-label{color:#334155;font-weight:500}
.dark .breadcrumb-label{color:#cbd5e1}
.breadcrumb-current{color:#64748b;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dark .breadcrumb-current{color:#94a3b8}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:.5rem}
.icon-btn{width:2rem;height:2rem;display:flex;align-items:center;justify-content:center;border-radius:.5rem;border:none;background:0 0;color:#94a3b8;cursor:pointer;transition:all .15s}
.icon-btn:hover{color:#475569;background:#f1f5f9}
.dark .icon-btn:hover{color:#cbd5e1;background:#1e293b}
.icon-btn svg{width:1rem;height:1rem}
.dark-show{display:none}
.dark .dark-show{display:block}
.dark-hide{display:block}
.dark .dark-hide{display:none}

.layout{flex:1;display:flex;max-width:1280px;margin:0 auto;width:100%}

.sidebar{position:fixed;inset:0;z-index:40;width:16rem;background:#fff;border-right:1px solid #e2e8f0;padding:4rem .75rem 1.5rem;overflow-y:auto;transition:transform .2s;transform:translateX(-100%)}
.dark .sidebar{background:#020617;border-color:#1e293b}
@media(min-width:768px){.sidebar{position:sticky;top:3.5rem;z-index:auto;inset:auto;transform:none;padding-top:1.5rem;border-right:none;height:calc(100vh - 3.5rem)}}
.sidebar.open{transform:translateX(0)}
.sidebar-label{font-size:.75rem;font-weight:600;color:#94a3b8;text-transform:uppercase;letter-spacing:.1em;padding:0 .25rem;margin-bottom:1.5rem}
.dark .sidebar-label{color:#64748b}
.nav-link{display:block;padding:.5rem .75rem;border-radius:.5rem;font-size:.875rem;font-weight:500;color:#475569;transition:all .15s}
.nav-link:hover{background:#f1f5f9}
.dark .nav-link{color:#94a3b8}
.dark .nav-link:hover{background:#1e293b}
.nav-link.active{background:#eef2ff;color:#4338ca}
.dark .nav-link.active{background:rgba(67,56,202,0.25);color:#a5b4fc}
.toc-section{margin-top:2rem;padding-top:1.5rem;border-top:1px solid #e2e8f0;padding-left:.25rem}
.dark .toc-section{border-color:#1e293b}
.toc-label{font-size:.75rem;font-weight:600;color:#94a3b8;text-transform:uppercase;letter-spacing:.1em;margin-bottom:.75rem}
.dark .toc-label{color:#64748b}
.toc-link{display:block;font-size:.875rem;color:#64748b;padding:.125rem 0;transition:color .15s}
.toc-link:hover{color:#334155}
.dark .toc-link{color:#94a3b8}
.dark .toc-link:hover{color:#e2e8f0}
.toc-link.h3{margin-left:.75rem;color:#94a3b8}
.dark .toc-link.h3{color:#64748b}

.main{flex:1;min-width:0;padding:2rem 1rem}
@media(min-width:640px){.main{padding:2rem 2rem}}
@media(min-width:768px){.main{padding:3rem 2rem}}
.content{max-width:65ch;margin:0 auto}

h1{font-size:2.25rem;line-height:1.2;font-weight:700;letter-spacing:-.025em;margin:0 0 1rem;color:#0f172a}
.dark h1{color:#f1f5f9}
h2{font-size:1.5rem;line-height:1.3;font-weight:600;letter-spacing:-.02em;margin:3.5rem 0 1rem;padding-bottom:.75rem;border-bottom:1px solid #e2e8f0;color:#0f172a}
.dark h2{color:#f1f5f9;border-color:#1e293b}
h3{font-size:1.25rem;line-height:1.4;font-weight:600;letter-spacing:-.01em;margin:2.5rem 0 .75rem;color:#1e293b}
.dark h3{color:#e2e8f0}
h4{font-size:1.125rem;line-height:1.4;font-weight:600;margin:2rem 0 .5rem;color:#1e293b}
.dark h4{color:#e2e8f0}
h5{font-size:1rem;line-height:1.5;font-weight:600;margin:1.5rem 0 .25rem;color:#334155}
.dark h5{color:#cbd5e1}
h6{font-size:.875rem;line-height:1.5;font-weight:600;margin:1rem 0 .25rem;color:#64748b;text-transform:uppercase;letter-spacing:.05em}
.dark h6{color:#94a3b8}
h2,h3,h4,h5,h6{scroll-margin-top:5rem;position:relative}
.anchor-link{position:absolute;left:-1.1em;opacity:0;transition:opacity .1s;color:#94a3b8;font-weight:400!important;text-decoration:none!important}
.dark .anchor-link{color:#475569}
h1:hover .anchor-link,h2:hover .anchor-link,h3:hover .anchor-link,h4:hover .anchor-link,h5:hover .anchor-link,h6:hover .anchor-link{opacity:1}
p{line-height:1.75;margin:0 0 1.25rem;color:#475569}
.dark p{color:#cbd5e1}
ul,ol{line-height:1.75;margin:0 0 1.25rem;padding-left:1.75rem;color:#475569}
.dark ul,.dark ol{color:#cbd5e1}
li{margin:.25rem 0}
pre{margin:0 0 1.5rem;padding:0;background:0 0}
pre code{display:block;overflow-x:auto;font-family:"JetBrains Mono",monospace;font-size:.8125rem;line-height:1.6}
.hljs{border-radius:.75rem;padding:1.25rem!important}
code:not(pre code){font-size:.8125rem;font-weight:500;background:#f1f5f9;padding:.15em .4em;border-radius:.25rem;color:#0f172a}
.dark code:not(pre code){background:#1e293b;color:#e2e8f0}
blockquote{margin:0 0 1.25rem;border-left:3px solid #4f46e5;background:#f8fafc;padding:.75rem 1.25rem;border-radius:0 .5rem .5rem 0;color:#475569}
.dark blockquote{background:#0f172a;color:#cbd5e1}
blockquote p:last-child{margin-bottom:0}
img{max-width:100%;height:auto;border-radius:.75rem;border:1px solid #e2e8f0;margin:1.5rem 0}
.dark img{border-color:#1e293b}
hr{margin:2rem 0;border:0;border-top:1px solid #e2e8f0}
.dark hr{border-color:#1e293b}
table{width:100%;font-size:.875rem;border-collapse:collapse;margin:0 0 1.5rem}
.table-wrapper{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 0 1.5rem}
.table-wrapper table{margin:0}
th{text-align:left;font-weight:600;padding:.5rem 1rem;border:1px solid #e2e8f0;background:#f8fafc;color:#0f172a}
.dark th{background:#0f172a;border-color:#1e293b;color:#f1f5f9}
td{padding:.5rem 1rem;border:1px solid #e2e8f0;color:#475569}
.dark td{border-color:#1e293b;color:#cbd5e1}

.nav-footer{max-width:65ch;margin:4rem auto 0;padding-top:2rem;border-top:1px solid #e2e8f0}
.dark .nav-footer{border-color:#1e293b}
.nav-footer-inner{display:flex;flex-wrap:wrap;gap:.5rem;font-size:.875rem}
.nav-btn{display:inline-flex;align-items:center;gap:.25rem;padding:.5rem 1rem;border-radius:.5rem;border:1px solid #e2e8f0;color:#475569;transition:all .15s}
.nav-btn:hover{background:#f8fafc;text-decoration:none}
.dark .nav-btn{border-color:#334155;color:#94a3b8}
.dark .nav-btn:hover{background:#0f172a;color:#e2e8f0}
.nav-btn.next{margin-left:auto}
.md-hidden{display:block}
@media(min-width:768px){.md-hidden{display:none}}
.overlay{position:fixed;inset:0;z-index:35;background:rgba(0,0,0,.3);display:none}
.overlay.show{display:block}
@media(min-width:768px){.overlay{display:none!important}}