:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#26344a;background:#fff;font-size:15px;line-height:1.7;--ink:#26344a;--muted:#66748a;--line:#e1e6ef;--accent:#4055b4;--soft:#edf1fc;--wash:#f7f9fc;--green:#18745c}
*{box-sizing:border-box}body{margin:0}a{color:var(--accent)}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:wait;opacity:.65}a,button,input,textarea,select,summary{outline-offset:4px}button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--accent)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip-link{position:absolute;top:-60px;background:white;padding:10px;z-index:10}.skip-link:focus{top:0}
.site-header{display:flex;align-items:center;gap:24px;padding:18px 32px;border-bottom:1px solid var(--line);min-height:78px}.brand{text-decoration:none;color:var(--ink);font-size:20px;font-weight:700;letter-spacing:-.7px;display:flex;align-items:center;gap:11px;white-space:nowrap}.brand-mark{display:inline-grid;place-items:center;width:35px;height:35px;border-radius:9px;background:var(--accent);color:#fff;font:18px ui-monospace,monospace}.header-divider{width:1px;height:22px;background:var(--line)}.site-description{color:var(--muted);font-size:13px}.course-tag{margin-left:auto;letter-spacing:1.1px;font-size:10px;color:var(--muted)}
.book-layout{display:grid;grid-template-columns:240px minmax(0,1fr);max-width:1440px;margin:auto;min-height:calc(100vh - 78px)}.sidebar{padding:36px 18px;border-right:1px solid var(--line);background:linear-gradient(180deg,#f7f9fc,#fff)}.sidebar-heading{color:var(--muted);font-size:10px;font-weight:650;letter-spacing:1.5px;margin:0 14px 17px}.chapter-heading{color:var(--ink);font-size:12px;font-weight:650;margin:22px 14px 4px}.lesson-link{display:flex;align-items:baseline;gap:12px;text-decoration:none;color:var(--muted);font-size:13px;padding:14px 13px;border-radius:7px;margin:5px 0;line-height:1.6}.lesson-link:hover{background:var(--wash)}.lesson-link.active{background:var(--soft);color:var(--accent);font-weight:600}.lesson-number{font:11px ui-monospace,monospace;opacity:.8}.sidebar-note{margin:60px 14px 0;border-top:1px solid var(--line);padding-top:23px}.small-label{font-size:10px;letter-spacing:1px;color:var(--muted)}.sidebar-note p{font-size:14px;line-height:1.8}.small-muted{font-size:11px;color:var(--muted)}
main{min-width:0;width:100%;max-width:920px;padding:45px 52px 24px;margin:0 auto}.lesson-kicker{font-size:10px;letter-spacing:1.3px;font-weight:650;color:var(--accent)}.lesson-kicker span{color:#b8c0cf;margin:0 12px}h1{font-size:38px;line-height:1.18;letter-spacing:-1.35px;font-weight:650;margin:17px 0}.lesson-summary{font-size:17px;line-height:1.8;color:var(--muted);margin:0 0 35px;max-width:640px}.lesson-content>h2{font-size:21px;letter-spacing:-.35px;font-weight:650;line-height:1.4;margin:35px 0 12px}.lesson-content>p{margin:14px 0;color:#45536a}.lesson-content>ul,.lesson-content>ol{padding-left:23px;color:#45536a}.lesson-content li{padding:3px 0}code{font:12px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace;background:#f0f3f8;padding:2px 5px;border-radius:4px}pre code{padding:0;background:none}.lesson-content>pre{background:var(--wash);padding:18px;overflow:auto;border-radius:7px}.lesson-content blockquote{border-left:3px solid var(--accent);margin:25px 0;padding:5px 18px;background:linear-gradient(90deg,#f4f6fd,#fff)}.lesson-content blockquote p{font-size:14px;margin:8px 0}.lesson-content table{width:100%;border-collapse:collapse;font-size:13px}.lesson-content td,.lesson-content th{border-bottom:1px solid var(--line);text-align:left;padding:9px}
.api-cell{margin:25px 0;border:1px solid #d7deea;border-radius:10px;overflow:hidden;box-shadow:0 3px 12px #26344a04;background:#fff}.cell-caption{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:11px 16px;background:var(--wash);border-bottom:1px solid var(--line);font-size:10px;font-weight:600;letter-spacing:1px;color:var(--muted)}.live-label{font-size:10px;letter-spacing:.2px;font-weight:400;display:flex;align-items:center;gap:6px}.live-label:before{content:"";display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--green)}.request-bar{display:flex;gap:8px;padding:15px;flex-wrap:wrap}.request-url{flex:1;width:180px}input,select,textarea{border:1px solid #dce2ec;border-radius:5px;padding:9px 10px;min-width:0;background:#fff;color:var(--ink);font:12px/1.6 ui-monospace,monospace}input:focus,textarea:focus,select:focus{outline:2px solid #b8c5f2;outline-offset:1px}.method{color:var(--green);font-weight:700;width:95px}button{border:1px solid var(--line);border-radius:6px;padding:8px 12px;background:white;color:var(--ink);font-size:12px}button:hover{background:var(--wash)}.primary{background:var(--accent);border-color:var(--accent);color:white;white-space:nowrap;font-weight:600}.primary:hover{background:#3247a5}.primary span{margin-left:7px}.text-button{border:0;background:none;padding:2px 0;color:var(--accent);font-size:11px;border-radius:2px}.text-button:hover{text-decoration:underline;background:none}
.request-headers,.curl-help{padding:0 16px 14px;font-size:12px}summary{cursor:pointer;color:var(--muted);width:fit-content}.header-count{font:10px ui-monospace,monospace;background:var(--wash);border-radius:4px;padding:2px 5px;margin-left:5px}.header-row{display:grid;grid-template-columns:1fr 1.6fr 32px;gap:8px;margin-top:10px}.header-row input{width:100%}.remove-header{padding:3px 8px}.add-header{margin-top:10px}.request-body{padding:0 16px 16px}.request-body label{font-size:12px;color:var(--muted);display:block;margin:0 0 7px}textarea{display:block;width:100%;resize:vertical}.body-editor{min-height:100px}.curl-command{border:0;border-radius:0;padding:17px;min-height:98px;line-height:1.8;background:#fcfdff}.curl-toolbar{display:flex;justify-content:space-between;gap:10px;align-items:center;padding:0 16px 13px;font-size:11px;color:var(--muted)}.curl-help{font-size:11px}.curl-help p{margin:10px 0 0;max-width:580px}.empty-response{border-top:1px solid var(--line);padding:21px 16px;color:#7c879a;font-size:12px;background:#fcfdff}.empty-response span{margin-right:9px;color:#a2abc0}
.response-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;border-block:1px solid var(--line);padding:11px 16px;background:var(--wash);font-size:11px}.status{font-weight:650;color:var(--green)}.status.is-error{color:#b03e43}.response-meta{color:var(--muted)}.response-toggle{margin-left:auto}.response-headers{padding:10px 16px;background:#fafbfd;border-bottom:1px solid var(--line)}.response-headers dl{display:grid;grid-template-columns:minmax(120px,.7fr) minmax(0,1fr);gap:3px 18px;font:11px/1.9 ui-monospace,monospace;margin:0;overflow-wrap:anywhere}.response-headers dt{color:var(--muted)}.response-headers dd{margin:0}.body-bar{display:flex;justify-content:space-between;gap:12px;padding:11px 16px 0;font-size:10px;letter-spacing:.4px;color:var(--muted)}.body-bar>div{display:flex;gap:13px}.response-output{font:12px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;white-space:pre;overflow:auto;max-height:520px;margin:0;padding:15px 17px 20px;tab-size:2;color:#34435a}.json-key{color:#8051a9}.json-string{color:var(--green)}.json-number{color:var(--accent)}.json-boolean{color:#a85b32}.cell-error{font-size:13px;padding:13px 16px;margin:0;border-top:1px solid #efcdcf;background:#fff5f5;color:#a53b43}.chapter-nav{display:flex;justify-content:space-between;gap:24px;border-top:1px solid var(--line);margin-top:45px;padding-top:24px}.chapter-nav a{text-decoration:none;font-size:14px;display:flex;flex-direction:column;gap:4px}.chapter-nav span{font-size:9px;letter-spacing:1px;color:var(--muted)}.chapter-nav .next{margin-left:auto;text-align:right}.lesson-footer{display:flex;gap:20px;justify-content:space-between;margin-top:48px;font-size:10px;color:#8190a6}.lesson-footer span{text-align:right}[hidden]{display:none!important}
@media(min-width:1400px){main{padding-inline:65px}}@media(max-width:1000px){.book-layout{grid-template-columns:200px minmax(0,1fr)}main{padding:35px 28px}.site-header{padding-inline:24px;gap:17px}.course-tag{display:none}h1{font-size:33px}}@media(max-width:720px){.site-header{padding:14px 18px}.header-divider,.site-description{display:none}.book-layout{display:block}.sidebar{border-right:0;border-bottom:1px solid var(--line);padding:12px}.sidebar nav{display:flex;gap:6px;overflow-x:auto}.sidebar-heading,.chapter-heading,.sidebar-note{display:none}.lesson-link{flex:0 0 auto;font-size:11px;margin:0;padding:9px;gap:8px}main{padding:28px 18px 20px}.lesson-summary{font-size:16px}.header-row{grid-template-columns:1fr 1fr 32px}.response-headers dl{grid-template-columns:1fr}.response-headers dd{margin-bottom:6px}.lesson-footer{flex-wrap:wrap}.response-toggle{margin-left:0}}@media(max-width:400px){.request-bar{gap:7px}.request-url{width:100%;flex-basis:100%;order:3}.method{flex:1}.header-row{grid-template-columns:minmax(0,1fr) 32px}.header-row input:nth-child(2){grid-column:1;grid-row:2}.remove-header{grid-column:2;grid-row:1/3}.curl-toolbar span{max-width:145px}h1{font-size:29px}}@media(pointer:coarse){button,summary{min-height:44px}input,select,textarea{font-size:16px}.response-toggle,.text-button{display:inline-flex;align-items:center}}

/* Curl cells read like a command line, with output directly underneath. */
.api-cell[data-kind="curl"]{box-shadow:none;border-color:var(--line)}
.curl-line{display:flex;align-items:center;gap:10px;padding:10px 12px}
.curl-input{display:flex;align-items:center;flex:1;min-width:0;gap:8px}
.curl-prefix{flex-shrink:0;font:12px/1.6 ui-monospace,monospace;color:var(--muted);white-space:nowrap}
.curl-input .curl-command{flex:1;width:0;min-width:0;min-height:0;border:0;background:transparent;padding:7px 0;line-height:1.6;border-radius:3px}
.curl-line .copy-command{min-width:40px;text-align:center}
.curl-response{border-top:1px solid var(--line);background:var(--wash)}
.curl-response .response-output{padding:14px 16px}
@media(max-width:400px){.curl-line{gap:7px;padding:9px}.curl-line .primary{padding:7px 9px}.curl-line .copy-command{min-width:30px}}

/* Keep inline explorers focused on the request and response. */
.api-cell[data-kind="explorer"]{box-shadow:none}
.api-cell[data-kind="explorer"] .request-bar{padding:10px 12px;gap:8px}
.api-cell[data-kind="explorer"] .request-headers{padding:0 12px 9px}
.api-cell[data-kind="explorer"] .request-body{padding:0 12px 12px}
.api-cell[data-kind="explorer"] .response-bar{padding:6px 12px;gap:12px;background:transparent;border-bottom:0}
.api-cell[data-kind="explorer"] .response-headers{padding:6px 12px}
.api-cell[data-kind="explorer"] .response-output{padding:10px 12px 12px}