/* ============================================================
   Shorts Notes — clean editorial blog theme.
   Self-contained: system fonts only, no external requests.
   Centered reading column, serif body, sans headings, mono labels.
   ============================================================ */
:root{
  --bg:#0D0F14; --surface:#161922; --surface2:#1B1F2A;
  --line:#242936; --line2:#2F3543;
  --text:#DCE0E8; --head:#DFE3EA; --muted:#8B92A2; --faint:#767D8C;
  /* muted azure — WCAG AAA (8.2:1 on bg) without the neon pop of a brighter cyan */
  --accent:#63B3D8; --accent-dim:rgba(99,179,216,.14);
  --sans:-apple-system,"Segoe UI",Roboto,system-ui,sans-serif;
  --serif:Georgia,"Iowan Old Style","Times New Roman",serif;
  --mono:ui-monospace,"Cascadia Code","JetBrains Mono",Consolas,monospace;
  /* fluid reading width: grows with the viewport (90vw) up to a readable cap,
     so mid screens waste less side space and wide screens don't over-stretch. */
  --measure:min(90vw,52rem);
}
*{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--text);
  font:400 19px/1.75 var(--serif);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:2px}
strong{color:#fff;font-weight:700}
em{font-style:italic;color:#EEF0F4}
code{font-family:var(--mono);font-size:.8em;background:var(--surface2);border:1px solid var(--line);border-radius:5px;padding:.1em .4em;color:#BFE6F7}
.mono{font-family:var(--mono)}
.dot{color:var(--faint);margin:0 .25em}

/* top reading progress */
.scrub{position:fixed;top:0;left:0;height:3px;width:0;z-index:20;background:var(--accent);
  box-shadow:0 0 10px var(--accent-dim);transition:width .1s linear}

/* layout shell */
.masthead,.article,.home,footer{width:100%;max-width:var(--measure);margin-inline:auto;padding-inline:24px}
.masthead{display:flex;align-items:center;justify-content:space-between;padding-block:22px;
  border-bottom:1px solid var(--line);margin-bottom:56px}
.brand{font:600 15px/1 var(--sans);color:var(--text);letter-spacing:-.01em}
.brand:hover{text-decoration:none;color:#fff}
.brand__mark{color:var(--accent);font-family:var(--mono);margin-right:6px}
.nav{display:flex;gap:22px}
.nav a{font:500 12px/1 var(--mono);color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.nav a:hover{color:var(--accent);text-decoration:none}

/* contact */
.contact__list{list-style:none;margin:44px 0 0;padding:0;border-top:1px solid var(--line)}
.contact__list li{display:flex;align-items:baseline;gap:20px;padding:24px 4px;border-bottom:1px solid var(--line)}
.contact__label{flex:none;width:88px;font-size:11.5px;color:var(--muted);letter-spacing:.1em;text-transform:uppercase}
.contact__list a{font:400 18px/1.4 var(--serif);word-break:break-word}

/* ---------- article ---------- */
.eyebrow{font:600 12px/1 var(--mono);color:var(--accent);letter-spacing:.16em;text-transform:uppercase;margin-bottom:24px}
h1{font:650 clamp(26px,3.8vw,36px)/1.16 var(--sans);letter-spacing:-.02em;color:var(--head);margin-bottom:20px}
.meta{font:500 13px/1 var(--mono);color:var(--muted);letter-spacing:.03em;text-transform:uppercase;margin-bottom:36px}
.lede{font:400 22px/1.62 var(--serif);color:#C6CBD5;margin-bottom:32px}
.lede em{color:#fff}

/* watch control */
.watchwrap{margin-bottom:8px}
.watch{display:flex;align-items:center;gap:12px;cursor:pointer;width:100%;text-align:left;
  background:var(--surface);border:1px solid var(--line2);border-radius:12px;
  padding:12px 16px 12px 12px;color:var(--text);font-family:var(--sans);transition:border-color .18s,background .18s}
.watch:hover{border-color:var(--line2);background:var(--surface2)}
.watch--open{border-bottom-left-radius:0;border-bottom-right-radius:0;border-color:var(--line2);background:var(--surface2)}
.watch__play{width:32px;height:32px;flex:none;border-radius:50%;background:var(--accent);color:#04222E;
  display:grid;place-items:center;font-size:12px;padding-left:2px}
.watch__txt{font-size:14.5px;font-weight:600}
.watch__hint{font-size:13px;color:var(--faint)}
.watch__chev{margin-left:auto;color:var(--muted);font-size:13px;transition:transform .2s}
.watch--open .watch__chev{transform:rotate(180deg);color:var(--accent)}
.watch--open .watch__hint{display:none}
.player{width:100%;max-width:320px;margin:0 auto;aspect-ratio:9/16;overflow:hidden;
  border:1px solid var(--line2);border-top:0;border-radius:0 0 12px 12px;background:#000;position:relative}
.player iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* prose sections */
.prose{margin-top:52px}
.beat{margin-bottom:60px}
.beat__no{font:600 12px/1 var(--mono);color:var(--faint);letter-spacing:.12em;margin-bottom:16px}
.beat__no span{color:var(--accent)}
.prose h2{font:650 22px/1.34 var(--sans);letter-spacing:-.015em;color:var(--head);margin-bottom:20px;
  padding-top:24px;border-top:1px solid var(--line)}
.prose p{margin-bottom:20px;color:var(--text)}
.prose p:last-child{margin-bottom:0}

/* takeaways */
.tldr{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:28px 30px;margin-top:12px}
.tldr h2{font:600 12px/1 var(--mono);text-transform:uppercase;letter-spacing:.16em;color:var(--accent);margin-bottom:20px;border:0;padding:0}
.tldr ul{margin:0;padding:0;list-style:none}
.tldr li{position:relative;margin-bottom:16px;padding-left:22px;font:400 16.5px/1.62 var(--serif);color:#CBD0DA}
.tldr li::before{content:"";position:absolute;left:2px;top:.6em;width:7px;height:7px;border-radius:2px;background:var(--accent);opacity:.85}
.tldr li:last-child{margin-bottom:0}

/* tags + yt */
.tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:32px}
.tags span{font:500 12px/1 var(--mono);color:var(--muted);letter-spacing:.03em;
  background:var(--surface);border:1px solid var(--line2);border-radius:100px;padding:7px 13px}
.yt{display:inline-flex;align-items:center;gap:6px;margin-top:28px;font:600 13px/1 var(--mono);
  letter-spacing:.04em;text-transform:uppercase}

/* ---------- home ---------- */
.home{padding-top:8px}
.eyebrow.home__eyebrow{margin-top:8px}
.home__title{font:650 clamp(34px,6vw,50px)/1.06 var(--sans);letter-spacing:-.03em;color:var(--head);margin-bottom:18px}
.home .lede{max-width:38rem}
.feed{list-style:none;margin:60px 0 0;padding:0}
.feed__item{border-top:1px solid var(--line)}
.feed__item:last-child{border-bottom:1px solid var(--line)}
.feed__item a{display:grid;grid-template-columns:auto 1fr auto;gap:24px;align-items:baseline;
  padding:34px 4px;color:var(--text);transition:padding-left .2s}
.feed__item a:hover{text-decoration:none;padding-left:12px}
.feed__no{font:600 13px/1 var(--mono);color:var(--faint);padding-top:4px}
.feed__item a:hover .feed__no{color:var(--accent)}
.feed__main{min-width:0}
.feed__eyebrow{display:block;font-size:11.5px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-bottom:9px}
.feed__title{display:block;font:650 21px/1.26 var(--sans);letter-spacing:-.018em;color:var(--head);margin-bottom:9px}
.feed__item a:hover .feed__title{color:var(--accent)}
.feed__desc{display:block;font:400 16px/1.55 var(--serif);color:var(--muted);max-width:46ch}
.feed__go{color:var(--faint);font:600 16px/1 var(--mono);align-self:center;transition:transform .2s,color .2s}
.feed__item a:hover .feed__go{color:var(--accent);transform:translateX(4px)}

/* footer */
footer{margin-top:80px;padding-block:26px 60px;border-top:1px solid var(--line);
  color:var(--faint);font:400 13px/1.6 var(--mono)}
footer .mono{color:var(--accent);margin-right:6px}

/* responsive + a11y */
@media (max-width:560px){
  body{font-size:17px}
  .masthead{margin-bottom:32px}
  .lede{font-size:19px}
  .feed__item a{grid-template-columns:1fr;gap:0}
  .feed__no,.feed__go{display:none}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}