/* ===========================================================
   LuminDesigns — Blog stylesheet
   Reuses the design tokens, typography and components from index.html
   =========================================================== */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --blue:#2d28db;--blue-deep:#2a25c4;--blue-bright:#4a43ff;
  --ink:#18181b;--muted:#6b7280;--muted-2:#9ca3af;
  --bg:#ffffff;--bg-2:#f6f6f8;--line:#e8e8ec;
  --radius:20px;--maxw:1180px;--ease:cubic-bezier(.2,.7,.2,1);
}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.5;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body.lock{overflow:hidden}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.serif{font-family:'Playfair Display',serif;font-style:italic}
.blue{color:var(--blue)}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--blue)}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--blue)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:12px;font-size:15px;font-weight:600;padding:13px 16px 13px 22px;border-radius:999px;border:1px solid transparent;cursor:pointer;transition:transform .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease);white-space:nowrap}
.btn .arr{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:14px;flex:none}
.btn-blue{background:var(--blue);color:#fff}
.btn-blue .arr{background:#fff;color:var(--blue)}
.btn-blue:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(45,40,219,.32)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light .arr{background:var(--blue);color:#fff}
.btn-light:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.14)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost .arr{background:var(--ink);color:#fff}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--ink)}

/* ---------- header ---------- */
header{position:fixed;top:0;left:0;right:0;z-index:90;height:84px;display:flex;align-items:center;transition:background .35s var(--ease),box-shadow .35s var(--ease)}
header.scrolled{background:rgba(255,255,255,.82);backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--line)}
header .wrap{display:flex;align-items:center;gap:20px;width:100%}
.logo{font-size:24px;font-weight:800;letter-spacing:-.03em}
.logo .b{font-family:'Playfair Display',serif;font-style:italic;color:var(--blue)}
.navpill{margin-left:auto;display:flex;gap:4px;background:var(--bg-2);border:1px solid var(--line);padding:6px;border-radius:999px}
.navpill a{font-size:14px;font-weight:500;color:#52525b;padding:9px 16px;border-radius:999px;transition:.25s var(--ease)}
.navpill a:hover{color:var(--ink)}
.navpill a.active{background:#fff;color:var(--ink);box-shadow:0 1px 4px rgba(0,0,0,.08)}
.bookpill{display:flex;align-items:center;gap:10px;background:var(--ink);color:#fff;padding:7px 16px 7px 7px;border-radius:999px;cursor:pointer;transition:transform .3s var(--ease)}
.bookpill:hover{transform:translateY(-2px)}
.bookpill .av{width:34px;height:34px;border-radius:50%;background:url(../assets/ved-avatar.jpg) center/cover;flex:0 0 auto}
.bookpill .t b{display:block;font-size:13px;font-weight:600;line-height:1.1}
.bookpill .t small{font-size:11px;color:#a1a1aa}
.menu-btn{display:none;margin-left:auto;background:none;border:0;font-size:24px;cursor:pointer;color:var(--ink)}

/* ---------- article hero ---------- */
.art-hero{padding:150px 0 0}
.crumbs{font-size:13px;color:var(--muted-2);margin-bottom:22px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.crumbs a{color:var(--muted);transition:.2s}
.crumbs a:hover{color:var(--blue)}
.crumbs .sep{opacity:.5}
.art-head{max-width:820px}
.art-cat{margin-bottom:18px}
.art-title{font-size:clamp(32px,5vw,58px);font-weight:800;letter-spacing:-.03em;line-height:1.04}
.art-title .serif{font-weight:500;color:var(--blue)}
.art-dek{font-size:clamp(17px,2vw,21px);color:var(--muted);margin-top:22px;max-width:680px;line-height:1.55}
.art-byline{display:flex;align-items:center;gap:14px;margin-top:30px;padding-bottom:34px;border-bottom:1px solid var(--line)}
.art-byline .ph{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#2d28db,#7a73ff);display:grid;place-items:center;color:#fff;font-weight:700;font-size:19px;font-family:'Playfair Display',serif;font-style:italic;flex:none;border:3px solid #fff;box-shadow:0 6px 18px rgba(45,40,219,.25)}
.art-byline b{display:block;font-size:15px}
.art-byline span{font-size:13px;color:var(--muted)}
.art-byline .dot{width:4px;height:4px;border-radius:50%;background:var(--muted-2);display:inline-block;margin:0 8px;vertical-align:middle}

/* ---------- cover ---------- */
.art-cover{max-width:var(--maxw);margin:40px auto 0;height:clamp(240px,40vw,440px);border-radius:24px;overflow:hidden;position:relative;border:1px solid var(--line)}
.art-cover svg{width:100%;height:100%;display:block}

/* ---------- article body ---------- */
.art-body{max-width:760px;margin:0 auto;padding:60px 0 20px}
.art-body>*{margin-bottom:24px}
.art-body p{font-size:18px;line-height:1.75;color:#3f3f46}
.art-body p .serif{color:var(--blue);font-style:italic}
.art-body h2{font-size:clamp(26px,3.4vw,36px);font-weight:800;letter-spacing:-.02em;line-height:1.15;margin-top:52px}
.art-body h2 .serif{font-weight:500;color:var(--blue)}
.art-body h3{font-size:22px;font-weight:700;letter-spacing:-.01em;margin-top:38px}
.art-body h3 .serif{font-weight:500;color:#52525b}
.art-body a.inline{color:var(--blue);font-weight:600;text-decoration:underline;text-decoration-color:rgba(45,40,219,.35);text-underline-offset:3px}
.art-body a.inline:hover{text-decoration-color:var(--blue)}
.art-body strong{color:var(--ink);font-weight:700}
.art-body ul,.art-body ol{padding-left:4px;display:grid;gap:14px}
.art-body li{font-size:18px;line-height:1.7;color:#3f3f46;display:flex;gap:14px;align-items:flex-start;list-style:none}
.art-body ul li::before{content:"";flex:none;width:9px;height:9px;border-radius:50%;background:var(--blue);margin-top:11px}
.art-body ol{counter-reset:li}
.art-body ol li{counter-increment:li}
.art-body ol li::before{content:counter(li);flex:none;width:26px;height:26px;border-radius:50%;background:var(--bg-2);border:1px solid var(--line);color:var(--blue);font-size:13px;font-weight:700;display:grid;place-items:center;margin-top:2px}
.art-body li .li-h{display:block;color:var(--ink);font-weight:700;margin-bottom:2px}
.art-body figure.lead{margin:40px 0}
.art-body blockquote{border-left:3px solid var(--blue);padding:6px 0 6px 26px;margin:40px 0}
.art-body blockquote p{font-family:'Playfair Display',serif;font-style:italic;font-size:clamp(21px,2.6vw,28px);line-height:1.45;color:var(--ink)}
.art-body blockquote cite{display:block;font-family:'Inter',sans-serif;font-style:normal;font-size:14px;color:var(--muted);margin-top:14px}

/* callout */
.callout{background:var(--bg-2);border:1px solid var(--line);border-radius:18px;padding:26px 28px;display:flex;gap:18px;align-items:flex-start}
.callout .ic{flex:none;width:40px;height:40px;border-radius:12px;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:20px}
.callout h4{font-size:16px;font-weight:700;margin-bottom:6px}
.callout p{font-size:16px!important;line-height:1.65;color:#52525b;margin:0}
.callout.blue{background:var(--blue);border-color:var(--blue)}
.callout.blue .ic{background:#fff;color:var(--blue)}
.callout.blue h4{color:#fff}
.callout.blue p{color:#d6d4ff!important}

/* key stats row inside article */
.art-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:42px 0}
.art-stats .s{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px}
.art-stats .s .n{font-size:38px;font-weight:800;color:var(--blue);letter-spacing:-.02em;line-height:1}
.art-stats .s .l{font-family:'Playfair Display',serif;font-style:italic;font-size:15px;color:#52525b;margin-top:8px}

/* code blocks (tutorial) */
.art-body pre{background:#0f0f1e;border-radius:16px;padding:22px 24px;overflow:auto;border:1px solid #20203a}
.art-body pre code{font-family:'SFMono-Regular',ui-monospace,Menlo,Consolas,monospace;font-size:14px;line-height:1.7;color:#e7e7f5;white-space:pre}
.art-body code.in{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.92em;background:var(--bg-2);border:1px solid var(--line);border-radius:6px;padding:2px 7px;color:var(--blue)}
.step-label{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--blue);background:#ecebff;border-radius:999px;padding:5px 13px;margin-bottom:4px}

/* divider */
.art-rule{border:0;height:1px;background:var(--line);margin:50px auto}

/* tags + share */
.art-foot{max-width:760px;margin:10px auto 0;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
.art-tags{display:flex;gap:9px;flex-wrap:wrap}
.art-tags span{font-size:13px;color:#52525b;border:1px solid var(--line);border-radius:999px;padding:6px 14px}

/* author card */
.author-card{max-width:760px;margin:46px auto 0;background:var(--bg-2);border:1px solid var(--line);border-radius:24px;padding:32px;display:flex;gap:20px;align-items:center}
.author-card .ph{width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,#2d28db,#7a73ff);display:grid;place-items:center;color:#fff;font-weight:700;font-size:26px;font-family:'Playfair Display',serif;font-style:italic;flex:none;border:3px solid #fff;box-shadow:0 6px 18px rgba(45,40,219,.25)}
.author-card b{font-size:17px}
.author-card p{font-size:14px;color:var(--muted);margin-top:4px;line-height:1.6}

/* ---------- related ---------- */
.related{padding:90px 0 30px}
.related .rt{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;flex-wrap:wrap;margin-bottom:42px}
.related .rt h2{font-size:clamp(28px,3.4vw,40px);font-weight:800;letter-spacing:-.02em}
.related .rt h2 .serif{font-weight:500;color:var(--blue)}
.rgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.rcard{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:transform .35s var(--ease),box-shadow .35s var(--ease);display:flex;flex-direction:column}
.rcard:hover{transform:translateY(-4px);box-shadow:0 22px 50px rgba(20,20,60,.1)}
.rcard .bimg{height:160px;position:relative}
.rcard .bimg svg{width:100%;height:100%}
.rcard .rbody{padding:20px 22px 24px;flex:1;display:flex;flex-direction:column}
.rcard .bmeta{font-size:13px;color:var(--muted-2);margin-bottom:9px}
.rcard h3{font-size:18px;font-weight:700;line-height:1.28;letter-spacing:-.01em}
.rcard .rlink{margin-top:auto;padding-top:16px;font-size:14px;font-weight:600;color:var(--blue);display:inline-flex;align-items:center;gap:7px}

/* ---------- footer CTA (matches index) ---------- */
.footcta{position:relative;background:var(--blue);color:#fff;overflow:hidden;padding:120px 0 0;margin-top:40px}
.footcta .l1{font-size:clamp(34px,6vw,76px);font-weight:800;letter-spacing:-.03em}
.footcta .l1 .serif{color:#c7c3ff;font-weight:500}
.footcta .l2{font-size:clamp(34px,6vw,76px);font-weight:800;letter-spacing:-.03em;text-align:right;margin-top:10px}
.footcta .l2 .serif{color:#c7c3ff;font-weight:500}
.footcta .wordmark{font-size:clamp(80px,21vw,300px);font-weight:800;letter-spacing:-.04em;line-height:.9;margin-top:40px;white-space:nowrap;transform:translateY(18%)}
.footcta .wordmark .a{color:#231fb0}
.footcta .wordmark .b{font-family:'Playfair Display',serif;font-style:italic;font-weight:700;color:#0b0a35}
.footbar{position:relative;z-index:2;display:flex;justify-content:center;gap:22px;align-items:center;padding:18px;margin:0 auto 26px;width:max-content;max-width:100%;flex-wrap:wrap;background:rgba(255,255,255,.12);border-radius:999px;font-size:13px;color:#e7e6ff}
.footbar a{opacity:.85}
.footbar a:hover{opacity:1}

/* ---------- modal (matches index) ---------- */
.modal{position:fixed;inset:0;z-index:120;display:none;align-items:center;justify-content:center;padding:22px}
.modal.open{display:flex}
.modal-ov{position:absolute;inset:0;background:rgba(15,15,40,.6);backdrop-filter:blur(5px);animation:fade .25s ease}
.modal-card{position:relative;width:min(980px,100%);max-height:92vh;overflow:auto;background:#fff;border-radius:18px;box-shadow:0 30px 90px rgba(0,0,0,.4);animation:pop .3s var(--ease)}
.modal-x{position:absolute;top:14px;left:14px;z-index:3;width:34px;height:34px;border-radius:50%;background:#fff;border:1px solid var(--line);font-size:20px;cursor:pointer;display:grid;place-items:center}
.modal-card .tidycal-embed{min-height:560px}
.modal-fallback{text-align:center;font-size:13px;color:var(--muted);padding:12px}
.modal-fallback a{color:var(--blue);text-decoration:underline}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes pop{from{opacity:0;transform:translateY(16px) scale(.98)}to{opacity:1;transform:none}}

/* back to top + book tab */
.to-top{position:fixed;right:22px;bottom:22px;z-index:60;width:46px;height:46px;border-radius:50%;background:var(--blue);color:#fff;border:3px solid rgba(255,255,255,.6);display:grid;place-items:center;font-size:18px;cursor:pointer;opacity:0;transform:translateY(14px);pointer-events:none;transition:opacity .3s,transform .3s var(--ease)}
.to-top.show{opacity:1;transform:translateY(0);pointer-events:auto}
.book-tab{position:fixed;right:0;top:46%;z-index:60;background:var(--ink);color:#fff;writing-mode:vertical-rl;padding:16px 8px;border-radius:10px 0 0 10px;font-size:13px;font-weight:600;letter-spacing:.06em;cursor:pointer;display:flex;align-items:center;gap:8px;border:0}
.book-tab .star{writing-mode:horizontal-tb;color:#e9ff5a;font-size:16px}

/* reveal */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- blog listing ---------- */
.list-hero{padding:150px 0 0;text-align:center}
.list-hero .bighead{font-size:clamp(36px,6vw,72px);font-weight:800;letter-spacing:-.03em;line-height:1.02;margin-top:18px}
.list-hero .bighead .serif{font-weight:500;color:var(--blue)}
.list-hero p{color:var(--muted);font-size:18px;max-width:560px;margin:22px auto 0}
.list-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:60px}
.list-grid .rcard .bimg{height:190px}
.list-grid .feat{grid-column:1/-1;display:grid;grid-template-columns:1.1fr .9fr}
.list-grid .feat .bimg{height:100%;min-height:300px}
.list-grid .feat .rbody{padding:40px}
.list-grid .feat h3{font-size:clamp(24px,3vw,34px);letter-spacing:-.02em}
.list-grid .feat p{font-size:16px;color:var(--muted);margin-top:12px;line-height:1.6}

@media(max-width:980px){
  .navpill,.bookpill{display:none}
  .menu-btn{display:block}
  .rgrid,.list-grid{grid-template-columns:1fr 1fr}
  .art-stats{grid-template-columns:1fr}
  .list-grid .feat{grid-template-columns:1fr}
}
@media(max-width:640px){
  .rgrid,.list-grid{grid-template-columns:1fr}
  .art-body p,.art-body li{font-size:16.5px}
}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}


/* === LuminDesigns logo + AI blog imagery === */
.logo{display:inline-flex;align-items:center;text-decoration:none}
.logo .brand-logo{height:38px;width:auto;display:block}
.bimg[data-blog="1"],.art-cover[data-blog="1"]{background-image:url(../assets/b1.jpg)}
.bimg[data-blog="2"],.art-cover[data-blog="2"]{background-image:url(../assets/b2.jpg)}
.bimg[data-blog="3"],.art-cover[data-blog="3"]{background-image:url(../assets/b3.jpg)}
.bimg[data-blog="4"],.art-cover[data-blog="4"]{background-image:url(../assets/b4.jpg)}
.bimg[data-blog],.art-cover[data-blog]{background-size:cover;background-position:center;background-repeat:no-repeat}