/* ═══ TWINS4BIM Blog · CSS ═══ */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --blue:#3B6FE8;--blue-dark:#2855C0;--blue-line:rgba(59,111,232,0.3);
  --ink:#080808;--s1:#0F0F0F;--s2:#161616;--s3:#1E1E1E;
  --border:rgba(255,255,255,0.07);--muted:rgba(255,255,255,0.5);--white:#FFFFFF;
  --serif:'Cormorant Garamond',Georgia,serif;--sans:'Outfit',-apple-system,'Segoe UI',sans-serif;
}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--ink);color:var(--white);line-height:1.7;font-size:15px}
img{max-width:100%;display:block;border-radius:0}
a{color:var(--blue);text-decoration:none;transition:opacity .2s}
a:hover{opacity:.75}

.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(8,8,8,.85);backdrop-filter:blur(16px);border-bottom:1px solid var(--border);padding:0 5vw;height:64px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-weight:800;letter-spacing:.04em;font-size:1.05rem;color:var(--white)}
.nav-logo .four{color:var(--blue)}
.nav-back{font-size:.7rem;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;font-weight:600;transition:color .2s}
.nav-back:hover{color:var(--white)}

/* Blog index */
.blog-hero{padding:130px 5vw 60px;border-bottom:1px solid var(--border);text-align:center;background:radial-gradient(ellipse at top,rgba(59,111,232,.1),var(--ink) 70%)}
.blog-hero .label{display:inline-flex;align-items:center;gap:.45rem;font-size:.62rem;letter-spacing:.18em;text-transform:uppercase;color:var(--blue);font-weight:700;margin-bottom:1rem}
.blog-hero .label::before{content:'';width:18px;height:1px;background:var(--blue)}
.blog-hero h1{font-family:var(--serif);font-weight:300;font-size:clamp(2rem,4vw,3.2rem);line-height:1.1;margin-bottom:1rem}
.blog-hero h1 em{font-style:italic;color:var(--blue)}
.blog-hero p{color:var(--muted);max-width:560px;margin:0 auto;font-size:.95rem}
.blog-grid{padding:4rem 5vw;display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:1.6rem;max-width:1200px;margin:0 auto}
.post-card{background:var(--s1);border:1px solid var(--border);overflow:hidden;display:flex;flex-direction:column;transition:.25s;text-decoration:none;color:inherit}
.post-card:hover{border-color:var(--blue-line);transform:translateY(-3px);opacity:1}
.post-card-img{aspect-ratio:16/9;background:linear-gradient(135deg,var(--s2),var(--s3));position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center}
.post-card-img svg{width:60%;height:60%;opacity:.4;transition:opacity .3s,transform .3s}
.post-card:hover .post-card-img svg{opacity:.7;transform:scale(1.06)}
.post-card-tag{position:absolute;top:12px;left:12px;background:rgba(0,0,0,.78);color:var(--blue);font-size:.55rem;letter-spacing:.18em;text-transform:uppercase;padding:.3rem .6rem;font-weight:700}
.post-card-body{padding:1.5rem 1.4rem 1.7rem;flex:1;display:flex;flex-direction:column}
.post-card-title{font-family:var(--serif);font-size:1.3rem;font-weight:300;line-height:1.25;color:var(--white);margin-bottom:.6rem}
.post-card-excerpt{font-size:.82rem;color:var(--muted);line-height:1.65;margin-bottom:1rem;flex:1}
.post-card-meta{font-size:.62rem;color:rgba(255,255,255,.4);letter-spacing:.1em;text-transform:uppercase}

/* Article (post) */
.article-hero{padding:130px 5vw 30px;max-width:780px;margin:0 auto}
.article-hero .breadcrumb{font-size:.7rem;color:var(--muted);margin-bottom:1.4rem;letter-spacing:.05em}
.article-hero .breadcrumb a{color:var(--muted)}
.article-hero .breadcrumb a:hover{color:var(--blue)}
.article-hero .post-tag{display:inline-block;background:rgba(59,111,232,.12);border:1px solid var(--blue-line);color:var(--blue);padding:.4rem .8rem;font-size:.6rem;letter-spacing:.15em;text-transform:uppercase;font-weight:700;margin-bottom:1.4rem}
.article-hero h1{font-family:var(--serif);font-weight:300;font-size:clamp(2rem,4.5vw,3.4rem);line-height:1.1;margin-bottom:1.2rem;letter-spacing:-.01em}
.article-hero h1 em{font-style:italic;color:var(--blue)}
.article-hero .meta{display:flex;gap:1.5rem;color:var(--muted);font-size:.78rem;margin-bottom:2rem;padding-bottom:2rem;border-bottom:1px solid var(--border);flex-wrap:wrap}
.article-hero .meta strong{color:var(--white);font-weight:600}
.article-cover{aspect-ratio:21/9;background:var(--s2);max-width:780px;margin:0 auto 2.5rem;display:flex;align-items:center;justify-content:center;overflow:hidden}
.article-cover svg{max-width:60%;max-height:80%;opacity:.6}
.article-body{max-width:680px;margin:0 auto;padding:0 5vw 3rem}
.article-body p{margin-bottom:1.4rem;color:rgba(255,255,255,.85);font-size:1.02rem;line-height:1.85}
.article-body h2{font-family:var(--serif);font-size:1.7rem;font-weight:300;color:var(--white);margin:2.5rem 0 1rem;line-height:1.25}
.article-body h2 em{font-style:italic;color:var(--blue)}
.article-body h3{font-family:var(--serif);font-size:1.3rem;font-weight:400;color:var(--white);margin:2rem 0 .8rem}
.article-body ul,.article-body ol{margin:0 0 1.4rem 1.4rem;color:rgba(255,255,255,.85);font-size:1rem;line-height:1.85}
.article-body ul li,.article-body ol li{margin-bottom:.55rem}
.article-body strong{color:var(--white);font-weight:600}
.article-body em{color:var(--white);font-style:italic}
.article-body blockquote{margin:2rem 0;padding:1.4rem 1.8rem;border-left:3px solid var(--blue);background:linear-gradient(90deg,rgba(59,111,232,.06),transparent);font-family:var(--serif);font-style:italic;font-size:1.15rem;color:var(--white);line-height:1.55}
.article-body .callout{margin:2rem 0;padding:1.4rem 1.6rem;background:linear-gradient(135deg,rgba(59,111,232,.08),rgba(255,235,59,.04));border:1px solid var(--blue-line);font-size:.92rem;line-height:1.75;color:var(--white)}
.article-body .callout strong{color:var(--blue)}
.article-cta{max-width:680px;margin:3rem auto;padding:2rem 1.8rem;text-align:center;background:linear-gradient(135deg,rgba(59,111,232,.1),rgba(8,8,8,0));border:1px solid var(--blue-line)}
.article-cta h3{font-family:var(--serif);font-size:1.5rem;font-weight:300;color:var(--white);margin-bottom:.8rem;line-height:1.25}
.article-cta h3 em{font-style:italic;color:var(--blue)}
.article-cta p{color:var(--muted);font-size:.88rem;margin-bottom:1.4rem}
.btn{display:inline-flex;align-items:center;gap:.55rem;padding:.85rem 1.6rem;font-size:.7rem;font-weight:700;letter-spacing:.13em;text-transform:uppercase;border:none;cursor:pointer;text-decoration:none;transition:.25s;font-family:var(--sans)}
.btn-blue{background:var(--blue);color:#fff !important}
.btn-blue:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 10px 26px rgba(59,111,232,.4);opacity:1}

.related{padding:3rem 5vw;border-top:1px solid var(--border);background:var(--s1)}
.related-head{text-align:center;max-width:560px;margin:0 auto 2rem}
.related-head .label{display:inline-flex;align-items:center;gap:.45rem;font-size:.62rem;letter-spacing:.18em;text-transform:uppercase;color:var(--blue);font-weight:700;margin-bottom:.6rem}
.related-head h2{font-family:var(--serif);font-size:1.7rem;font-weight:300;color:var(--white)}
.related-grid{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.2rem}

.footer{padding:2.5rem 5vw;background:var(--ink);text-align:center;font-size:.7rem;color:var(--muted);line-height:2;border-top:1px solid var(--border)}

@media(max-width:720px){
  .nav{padding:0 4vw;height:56px}
  .nav-logo{font-size:.9rem}
  .blog-hero{padding:90px 5vw 40px}
  .blog-grid{padding:2.5rem 5vw}
  .article-hero{padding:90px 5vw 20px}
  .article-cover{aspect-ratio:4/3}
  .article-body{padding:0 6vw 2rem}
  .article-body p,.article-body ul,.article-body ol{font-size:.95rem}
}