/* wk01 article, layout v2. Builds on ytbe.com's site.css + interior-system.css (unchanged copies of the live files).
   Hero = the TBA departures-board family (classes .tba-*, .tb-* come from site.css). Navigation = the demo Chapters button + menu + tick rail, extended. */
:root{--hdr:86px;--bar:68px;--ink:#091524;--panel:#14263d;--blue:#66c6ff;--orange:#ff813e;--line:#294059;--text:#c1d0df;--mut:#9fb3c7;--green:#5fd3a2}
@media(max-width:760px){:root{--hdr:72px;--bar:64px}}
html{scroll-padding-top:calc(var(--hdr) + var(--bar) + 20px)}
.fin-ok .c{color:#79cfff}
.tb-lamp{width:.62em;height:.62em;border-radius:50%;background:#79cfff;box-shadow:0 0 .9em #79cfffaa;margin-right:.7em;transition:background .25s,box-shadow .25s;flex:none}
.tb-lamp.stop{background:#ff8a4a;box-shadow:0 0 .9em #ff8a4acc}.tb-lamp.tent{background:#f6c744;box-shadow:0 0 .9em #f6c744aa}.tb-lamp.idle{background:#4b6580;box-shadow:none}
.tba-board .tb-title{display:inline-flex;align-items:center}
.wk-hero .tba-copy .wk-meta{margin:22px 0 0;font-size:14px;color:#9fb3c7}
.wk-hero .tba-copy .wk-meta strong{color:#fff}
.wk-hero .tba-copy p:not(.eyebrow):not(.wk-meta){max-width:56ch}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:4px}
.proto-pill{position:fixed;right:84px;bottom:30px;z-index:40;background:#2a1a10;color:#ffc9a8;font-size:12px;padding:5px 12px;border:1px solid #5a3820;border-radius:99px;pointer-events:none}
@media(max-width:900px){.proto-pill{display:none}}
.news-layout.art-layout{padding-block:44px 96px}
.news-layout.art-layout>*{min-width:0;max-width:100%}
.art-body{overflow-wrap:break-word}
.news-copy.art-body{font-size:16.5px;line-height:1.78}
.news-copy.art-body>.lede-note:first-child{margin-top:0}
/* body typography: base from .legal-copy; additions for dense content */
.art-body h2,.art-body h3,.art-body h4{display:flex;align-items:baseline;flex-wrap:wrap;gap:4px 12px;position:relative;color:#f4f8ff;text-wrap:pretty}
.art-body .hd-text{min-width:0}
.art-body h2{font-size:30px;margin:64px 0 18px;padding-top:28px;border-top:1px solid var(--line);scroll-margin-top:calc(var(--hdr) + 24px)}
.art-body .lede-note+section>h2,.art-body>section:first-of-type>h2{margin-top:0}
.art-body h3{font-size:23px;line-height:1.3;margin:44px 0 14px;scroll-margin-top:calc(var(--hdr) + 24px);letter-spacing:-.01em}
.art-body h4{font-size:18px;margin:32px 0 10px;scroll-margin-top:calc(var(--hdr) + 24px);color:#dbe8f5}
.optional-part>.lede-note{margin:0 0 20px}
.art-body .lede-note{font-style:italic;color:var(--mut);font-size:15px;margin:0 0 20px}
.art-body p{margin:0 0 18px}
.art-body a{color:var(--blue)}
.art-body strong{color:#fff}
.art-body hr{border:0;border-top:1px solid var(--line);margin:40px 0}
.art-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88em;background:#0e2034;border:1px solid #23405d;border-radius:5px;padding:1px 6px;color:#e6f2fc;overflow-wrap:anywhere}
.tag{font-size:11px;font-weight:750;letter-spacing:.12em;text-transform:uppercase;border-radius:99px;padding:3px 10px;line-height:1.5;transform:translateY(-3px)}
.tag-part{background:#0c3552;color:var(--blue);border:1px solid #1b5f8c}
.tag-opt{background:#1f2a38;color:#d3deea;border:1px dashed #7188a0}
.tag-try{background:#0f3a2e;color:var(--green);border:1px solid #1f6a52}
.step-num{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--orange);color:#1a0d05;font-weight:800;font-size:17px;flex:none;align-self:center}
.anchor{opacity:0;margin-left:4px;color:var(--mut);display:inline-grid;place-items:center;width:28px;height:28px;border-radius:6px;align-self:center;transition:opacity .15s}
.art-body .hd:hover .anchor,.anchor:focus-visible{opacity:1}
.anchor:hover{color:var(--blue);background:#14263d}
@media(pointer:coarse){.anchor{opacity:.55}}
.art-body ul,.art-body ol{padding-left:24px;margin:0 0 20px}
.art-body li{margin-bottom:10px;padding-left:6px}
.art-body li>.li-lead{display:block;margin-bottom:8px}
.art-body li>figure,.art-body li>p,.art-body li>aside{margin-top:12px}
.steps-list{counter-reset:none}
.steps-list>li::marker{color:var(--orange);font-weight:700}
.checklist{list-style:none;padding-left:0}
.checklist li.task{padding-left:0}
.task label{display:flex;gap:12px;align-items:flex-start;cursor:pointer}
.task input{position:absolute;opacity:0;width:20px;height:20px;margin:3px 0 0}
.task .box{flex:none;width:20px;height:20px;margin-top:5px;border:2px solid #4b789b;border-radius:5px;display:grid;place-items:center;transition:.15s}
.task input:checked+.box{background:var(--green);border-color:var(--green)}
.task input:checked+.box::after{content:"";width:5px;height:10px;border:solid #06241a;border-width:0 2.5px 2.5px 0;transform:rotate(45deg) translate(-1px,-1px)}
.task input:focus-visible+.box{outline:3px solid var(--blue);outline-offset:3px}
.task input:checked~.task-text{color:#dff6ec}

/* step and part sections */
.part>h2{border-top:0;padding-top:0;margin-top:72px;font-size:34px;padding:22px 0 0}
.part>h2::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:linear-gradient(90deg,#168dcc,transparent)}
.step>h3{padding-top:8px}
.step{border-left:2px solid #1d3550;padding-left:22px}
@media(max-width:700px){.step{padding-left:14px}}
.sec-h3.step{margin-top:12px}

/* optional Part 4 */
.optional-part{margin-top:80px;padding:8px 32px 32px;border:1px solid rgba(159,179,199,.18);border-radius:18px;background:linear-gradient(180deg,#0f1d30 0%,#0b1726 240px,#0b1726 100%);box-shadow:0 1px 0 rgba(255,255,255,.04) inset}
.optional-part>h2{border-top:0;margin-top:20px}
.optional-part::before{content:"";}
.optional-banner{margin:0 0 24px!important;padding:12px 16px;border-radius:8px;background:#1b2a3b;border:1px solid #3b556f;color:#d3deea;font-size:15px}
.optional-part>.hd .tag{transform:translateY(-6px)}
@media(max-width:640px){.optional-part{padding:4px 14px 18px;margin-inline:-6px}}

/* Try it blocks */
.tryit{position:relative;margin:48px 0;padding:10px 30px 26px;border-radius:16px;background:radial-gradient(120% 80% at 0% 0%,rgba(102,198,255,.07),transparent 55%),linear-gradient(180deg,#112238 0%,#0d1a2b 100%);border:1px solid rgba(102,198,255,.16);box-shadow:0 1px 0 rgba(255,255,255,.04) inset,0 18px 40px -24px rgba(0,0,0,.6)}.tryit::before{content:"";position:absolute;left:30px;right:30px;top:0;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--orange),rgba(255,129,62,0) 60%)}.tryit .tag,.tryit>h3 .tag{background:rgba(255,129,62,.12)!important;color:#ffb488!important;border:1px solid rgba(255,129,62,.45)!important}
.tryit>h3{margin-top:18px}
@media(max-width:640px){.tryit{padding:2px 16px 16px;margin-inline:-6px}}

/* callouts */
.callout{margin:26px 0;border-radius:10px;border:1px solid var(--cc,#3b556f);background:var(--cb,#112338);border-left-width:5px;padding:14px 20px 6px}
.callout-title{display:flex;align-items:center;gap:8px;margin:0 0 8px!important;font-size:12px;font-weight:800;letter-spacing:.13em;text-transform:uppercase;color:var(--cc)}
.callout .ico{width:20px;height:20px;border-radius:50%;background:var(--cc);display:inline-grid;place-items:center;color:#07121d;font-weight:900;font-size:13px;letter-spacing:0}
.callout-body p{font-size:16px;margin-bottom:12px}
.callout.warning{--cc:#ff9a5c;--cb:#2a1a12}.callout.warning .ico::after{content:"!"}
.callout.tip{--cc:#66c6ff;--cb:#0f2438}.callout.tip .ico::after{content:"i";font-style:italic;font-family:Georgia,serif}
.callout.note{--cc:#b8c6d6;--cb:#152233}.callout.note .ico::after{content:"i";font-family:Georgia,serif}
.callout.check{--cc:var(--green);--cb:#0e2a24}.callout.check .ico::after{content:"\2713"}
.callout.check{padding-top:10px;padding-bottom:2px}

/* prompt blocks (blockquotes without a label) */
.prompt{position:relative;margin:24px 0;border-radius:12px;background:#0b1a2b;border:1px solid #23405d}
.prompt-label{margin:0!important;padding:10px 18px 0;font-size:11px;font-weight:750;letter-spacing:.13em;text-transform:uppercase;color:var(--blue)}
.prompt blockquote{margin:0;padding:6px 18px 16px;background:none;border:0;border-radius:0}
.prompt blockquote p{font-size:16.5px!important;color:#e8f1fa;margin:0}
.prompt .copy-btn{position:absolute;top:8px;right:8px}

/* code and copy buttons */
.codeblock{position:relative;margin:22px 0}
.codeblock pre{margin:0;background:#07111d;border:1px solid #23405d;border-radius:10px;padding:18px 90px 18px 18px;overflow:auto;font-size:14px;line-height:1.6}
.codeblock pre code{background:none;border:0;padding:0;font-size:inherit;overflow-wrap:normal;white-space:pre}
.codeblock .copy-btn{position:absolute;top:10px;right:10px}
.copy-btn{background:#16304b;color:#cfe6f8;border:1px solid #2b5276;border-radius:6px;font-size:12px;font-weight:650;padding:4px 10px;cursor:pointer;line-height:1.4}
.copy-btn:hover{background:#1c3d5f;color:#fff}
.copy-btn.done{background:#0f3a2e;border-color:#1f6a52;color:var(--green)}
.codecopy{display:inline-flex;align-items:center;gap:6px;max-width:100%;vertical-align:baseline}
.copy-btn.inline{padding:0 7px;font-size:11px;flex:none}

/* tables */
.tablewrap{margin:26px 0;overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:linear-gradient(90deg,#0e1d2f 30%,#0e1d2f00) 0 0/40px 100% no-repeat local,linear-gradient(270deg,#0e1d2f 30%,#0e1d2f00) 100% 0/40px 100% no-repeat local,linear-gradient(90deg,#000a,#0000) 0 0/14px 100% no-repeat scroll,linear-gradient(270deg,#000a,#0000) 100% 0/14px 100% no-repeat scroll,#0e1d2f;-webkit-overflow-scrolling:touch;scrollbar-width:thin}
.xtable{border-collapse:collapse;width:100%;min-width:640px;font-size:15px;line-height:1.55}
.xtable th{position:sticky;top:0;background:#16304b;color:#fff;text-align:left;font-size:12px;letter-spacing:.09em;text-transform:uppercase;padding:12px 16px;white-space:nowrap}
.xtable td{padding:13px 16px;border-top:1px solid #1e3550;vertical-align:top}
.xtable td:first-child{color:#fff;min-width:150px}
.xtable tbody tr:nth-child(even){background:#0c1a2a}
.xtable td p{margin:0}
.tablewrap:focus-visible{outline-offset:2px}
@media(max-width:700px){.tablewrap{margin-inline:-20px;border-radius:0;border-inline:0;position:relative}.xtable{font-size:14px}}
.tablewrap::after{content:"";}

/* figures */
.fig{margin:30px 0 34px}
.art-body li .fig{margin:16px 0 22px}
.fig-media{position:relative;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#0a1626}
.fig-media img,.fig-media video{display:block;width:100%;height:auto}
.zoom-btn{display:block;width:100%;padding:0;border:0;background:none;cursor:zoom-in;color:inherit}
.zoom-btn.full:hover img{filter:brightness(1.06)}
.fig-anim .zoom-btn{position:absolute;right:10px;top:10px;width:auto;padding:5px 12px;border-radius:99px;background:#07111dd9;color:#e8f1fa;font-size:12px;font-weight:650;border:1px solid #2b5276;cursor:zoom-in;opacity:0;transition:opacity .15s}
.fig-anim .vid-toggle{position:absolute;left:10px;top:10px;padding:5px 12px;border-radius:99px;background:#07111dd9;color:#e8f1fa;font-size:12px;font-weight:650;border:1px solid #2b5276;cursor:pointer;opacity:0;transition:opacity .15s}
.fig-media:hover .zoom-btn,.fig-media:hover .vid-toggle,.fig-media .zoom-btn:focus-visible,.fig-media .vid-toggle:focus-visible{opacity:1}
@media(pointer:coarse){.fig-anim .zoom-btn,.fig-anim .vid-toggle{opacity:1}}
.fig-anim video{cursor:zoom-in}
.fig figcaption{margin-top:10px;font-size:14px;line-height:1.55;color:var(--mut)}
.fig figcaption::before{content:"";display:inline-block;width:14px;height:2px;background:var(--orange);vertical-align:middle;margin-right:8px}

/* lightbox */
.lightbox{position:fixed;inset:0;z-index:100;background:#030a12ee;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:56px 20px 20px;gap:12px}
.lightbox[hidden],.to-top[hidden]{display:none}
.lb-stage{max-width:min(1500px,96vw);max-height:calc(100vh - 150px);display:grid;place-items:center;overflow:auto}
.lb-stage img,.lb-stage video{max-width:100%;max-height:calc(100vh - 150px);width:auto;height:auto;border-radius:8px;background:#0a1626}
.lb-cap{margin:0;color:#c1d0df;font-size:14px;max-width:80ch;text-align:center}
.lb-close{position:absolute;top:14px;right:16px;background:#16304b;color:#fff;border:1px solid #2b5276;border-radius:8px;padding:8px 16px;font-size:14px;cursor:pointer}

/* back to top, toast */
.to-top{position:fixed;right:22px;bottom:22px;z-index:40;width:46px;height:46px;border-radius:50%;border:1px solid #2b5276;background:#16304b;color:#fff;display:grid;place-items:center;cursor:pointer;box-shadow:0 8px 24px #0007}
.to-top:hover{background:#1f4a74}
.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);background:#0f3a2e;color:#dff6ec;border:1px solid #1f6a52;border-radius:8px;padding:8px 16px;font-size:14px;opacity:0;pointer-events:none;transition:.2s;z-index:120}
.toast.on{opacity:1;transform:translate(-50%,0)}

/* ---- aside: card + meta, as in the TBA article ---- */
.news-aside .news-meta strong{color:#fff;font-weight:650}
.news-aside .aside-facts{margin:0;padding:12px 0 0;border-top:1px solid var(--line);list-style:none;display:grid;gap:6px;font-size:13.5px;color:#9fb3c7}
.news-aside .aside-facts li{margin:0;padding:0}.news-aside .aside-facts b{color:#fff;font-weight:650}

/* ---- lightbox, toast, back-to-top ---- */
.lightbox[hidden],.to-top[hidden]{display:none}
.to-top{bottom:22px}
@media(max-width:760px){.to-top{right:14px;bottom:14px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.chapmenu,.chapscrim{transition:none!important}}
.motion-paused .chapmenu{transition:none}
@media print{.chapbar,.to-top,.proto-pill{display:none!important}}
@media(max-width:700px){.news-copy.art-body{font-size:16px}.news-copy.art-body h2{font-size:25px!important}.news-copy.art-body .part>h2{font-size:27px!important}.news-copy.art-body h3{font-size:20px}}