/* ===== RESET ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
  --bg:#0b0d17;
  --bg-alt:#111425;
  --surface:#181b2e;
  --surface-alt:#1e2238;
  --text:#ddddef;
  --text-muted:#8a8ca0;
  --primary:#7c3aed;
  --primary-light:#9461f8;
  --accent:#f59e0b;
  --accent-light:#fbbf24;
  --border:#272a40;
  --success:#22c55e;
  --danger:#ef4444;
  --warning:#eab308;
  --radius:6px;
  --shadow:0 4px 24px rgba(0,0,0,.4);
  --max:1120px;
  --font:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Noto Sans',Helvetica,Arial,sans-serif;
}

html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary-light);text-decoration:none;transition:color .2s}
a:hover,a:focus{color:var(--accent-light)}
a:focus-visible{outline:2px solid var(--primary-light);outline-offset:2px}
ul,ol{list-style:none}
h1,h2,h3,h4{color:#fff;line-height:1.25;font-weight:700}
h1{font-size:2.4rem;letter-spacing:-.02em}
h2{font-size:1.65rem;margin-bottom:.75rem}
h3{font-size:1.2rem}
p{margin-bottom:1rem}
p:last-child{margin-bottom:0}
blockquote{
  border-left:3px solid var(--primary);
  padding:.6rem 1.2rem;
  background:var(--surface);
  margin:1.5rem 0;
  font-style:italic;
  color:var(--text-muted);
  border-radius:0 var(--radius) var(--radius) 0;
}

/* ===== CONTAINER ===== */
.container{max-width:var(--max);margin:0 auto;padding:0 1.5rem;width:100%}
.narrow{max-width:680px;margin-left:auto;margin-right:auto}
.medium{max-width:780px;margin-left:auto;margin-right:auto}
.wide{max-width:880px;margin-left:auto;margin-right:auto}

/* ===== SKIP LINK ===== */
.skip-link{
  position:absolute;left:-9999px;top:auto;
  background:var(--primary);color:#fff;padding:.5rem 1rem;
  border-radius:var(--radius);font-weight:600;z-index:9999;
}
.skip-link:focus{left:1rem;top:1rem}

/* ===== BANNER ===== */
.placeholder-banner{
  background:var(--danger);color:#fff;
  padding:.5rem 1rem;text-align:center;
  font-size:.82rem;font-weight:600;
}

/* ===== HEADER ===== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(11,13,23,.95);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
}
.site-header .container{
  display:flex;align-items:center;
  justify-content:space-between;
  padding-top:.8rem;padding-bottom:.8rem;
}
.site-logo{
  display:flex;align-items:center;gap:.5rem;
  color:#fff;font-weight:700;font-size:1.15rem;letter-spacing:.02em;
}
.site-logo:hover{color:var(--primary-light)}
.site-logo img{width:36px;height:36px}
.nav-toggle{
  display:none;background:none;border:none;
  color:var(--text);cursor:pointer;padding:.5rem;font-size:1.5rem;line-height:1;
}
.main-nav ul{display:flex;gap:1.6rem;align-items:center}
.main-nav a{color:var(--text-muted);font-size:.92rem;font-weight:500;transition:color .2s}
.main-nav a:hover,.main-nav a[aria-current="page"]{color:#fff}

/* ===== HERO ===== */
.hero{padding:3.5rem 0 2rem}
.hero-img{
  width:100%;border-radius:var(--radius);
  margin-bottom:2rem;border:1px solid var(--border);
}
.hero h1{margin-bottom:.8rem;max-width:600px}
.hero .subtitle{
  font-size:1.08rem;color:var(--text-muted);
  max-width:580px;margin-bottom:1.5rem;line-height:1.65;
}
.hero .operator{
  font-size:.82rem;color:var(--text-muted);
  margin-top:1.5rem;padding-top:1rem;border-top:1px solid var(--border);
}
.hero .operator a{color:var(--text-muted);text-decoration:underline}

/* ===== BUTTON ===== */
.btn{
  display:inline-block;padding:.65rem 1.6rem;
  border-radius:var(--radius);font-weight:600;
  font-size:.92rem;transition:all .2s;cursor:pointer;border:none;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-light);color:#fff}
.btn-secondary{
  background:transparent;color:var(--primary-light);
  border:1px solid var(--border);
}
.btn-secondary:hover{border-color:var(--primary-light)}

/* ===== SECTION ===== */
.section{padding:3rem 0}
.section-alt{background:var(--bg-alt)}

/* ===== OBSERVATION ===== */
.observation{max-width:780px}
.observation p{color:var(--text);line-height:1.85;font-size:1.02rem}

/* ===== SHOWCASE ===== */
.showcase{margin:2.5rem 0}
.showcase-img{
  width:100%;border-radius:var(--radius);
  border:1px solid var(--border);margin-bottom:1.5rem;
}
.showcase-caption{
  font-size:.82rem;color:var(--text-muted);
  text-align:center;margin-top:-.8rem;margin-bottom:1.5rem;
}

/* ===== APPROACH ===== */
.approach{max-width:780px}
.approach h2{margin-bottom:1.5rem}
.approach p{line-height:1.85}

/* ===== SERVICES LIST ===== */
.svc-list{margin:2rem 0}
.svc-item{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:1.5rem 1.8rem;
  margin-bottom:1.2rem;
}
.svc-item h3{color:var(--accent);margin-bottom:.6rem;font-size:1.1rem}
.svc-item p{color:var(--text);line-height:1.75;margin-bottom:.5rem}
.svc-item .not-for{font-size:.88rem;color:var(--text-muted);font-style:italic}
.svc-bounds{
  max-width:680px;background:var(--surface);
  padding:1.5rem 1.8rem;border-left:3px solid var(--accent);
  border-radius:0 var(--radius) var(--radius) 0;
  margin:2rem 0;
}
.svc-bounds h3{margin-bottom:.8rem}
.svc-bounds ul{padding-left:1.2rem}
.svc-bounds li{
  color:var(--text-muted);margin-bottom:.5rem;
  position:relative;padding-left:.6rem;
}
.svc-bounds li::before{
  content:"\00D7";position:absolute;left:-.8rem;color:var(--danger);font-weight:700;
}

/* ===== SIGNAL ===== */
.signal{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:1.5rem 2rem;
  max-width:680px;margin:0 auto;
}
.signal .sig-label{
  font-size:.72rem;text-transform:uppercase;
  letter-spacing:.08em;color:var(--accent);
  margin-bottom:.6rem;font-weight:600;
}
.signal p{font-size:.92rem;color:var(--text-muted);line-height:1.7}

/* ===== FEATURED ARTICLES ===== */
.feat-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  grid-template-rows:auto auto;
  gap:1.5rem;margin-top:1.5rem;
}
.feat-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);overflow:hidden;transition:border-color .2s;
}
.feat-card:hover{border-color:var(--primary)}
.feat-card--lg{grid-column:1;grid-row:1/3}
.feat-card--sm{grid-column:2}
.feat-card img{
  width:100%;aspect-ratio:auto;
  border-bottom:1px solid var(--border);
}
.feat-card--lg img{aspect-ratio:3/2}
.feat-card--sm img{aspect-ratio:4/3}
.feat-card__body{padding:1.2rem 1.4rem}
.feat-card__body h3{margin-bottom:.5rem;font-size:1.05rem}
.feat-card__body h3 a{color:#fff}
.feat-card__body h3 a:hover{color:var(--primary-light)}
.feat-card__meta{font-size:.78rem;color:var(--text-muted);margin-bottom:.5rem}
.feat-card__desc{font-size:.88rem;color:var(--text-muted);line-height:1.6}

/* ===== FAQ ===== */
.faq-list{max-width:780px;margin:1.5rem auto 0}
.faq-item{border-bottom:1px solid var(--border)}
.faq-item summary{
  padding:1rem 0;cursor:pointer;font-weight:600;
  color:#fff;font-size:1rem;
  display:flex;justify-content:space-between;align-items:center;
}
.faq-item summary::after{
  content:"+";font-size:1.3rem;color:var(--primary-light);
  transition:transform .2s;flex-shrink:0;margin-left:1rem;
}
.faq-item[open] summary::after{content:"\2212"}
.faq-answer{
  padding:0 0 1.2rem;color:var(--text-muted);
  font-size:.93rem;line-height:1.7;
}

/* ===== ARTICLE ===== */
.article-header{padding:2.5rem 0 1rem}
.article-meta{
  display:flex;flex-wrap:wrap;gap:.8rem;
  font-size:.82rem;color:var(--text-muted);margin-bottom:1rem;
}
.article-meta span{display:flex;align-items:center;gap:.3rem}
.article-summary{
  background:var(--surface);padding:1.2rem 1.5rem;
  border-radius:var(--radius);border-left:3px solid var(--primary);
  margin:1.5rem 0;font-size:.95rem;color:var(--text-muted);line-height:1.7;
}
.article-body{max-width:780px;margin:0 auto;padding:2rem 0}
.article-body h2{margin-top:2.5rem;margin-bottom:.8rem}
.article-body h3{margin-top:1.8rem;margin-bottom:.6rem;color:var(--accent-light)}
.article-body p{line-height:1.85}
.article-body ul,.article-body ol{padding-left:1.5rem;margin:1rem 0}
.article-body li{margin-bottom:.5rem;line-height:1.7}
.article-body li::marker{color:var(--primary-light)}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.5rem 0;
  background:var(--surface);border-radius:var(--radius);overflow:hidden;
}
.article-body th,.article-body td{
  padding:.7rem 1rem;text-align:left;border-bottom:1px solid var(--border);font-size:.9rem;
}
.article-body th{background:var(--surface-alt);color:#fff;font-weight:600}
.article-cover{
  width:100%;border-radius:var(--radius);
  margin-bottom:1.5rem;border:1px solid var(--border);
}

/* ===== AUTHOR BOX ===== */
.author-box{
  display:flex;gap:1.5rem;align-items:flex-start;
  background:var(--surface);padding:1.5rem;
  border-radius:var(--radius);border:1px solid var(--border);margin:2.5rem 0;
}
.author-box img{
  width:80px;height:100px;border-radius:var(--radius);
  flex-shrink:0;border:1px solid var(--border);
}
.author-box h4{margin-bottom:.3rem;font-size:1rem}
.author-box p{font-size:.88rem;color:var(--text-muted);line-height:1.6}

/* ===== REFERENCES ===== */
.references,.further-reading{
  margin:2rem 0;padding-top:1.5rem;border-top:1px solid var(--border);
}
.references h3,.further-reading h3{
  font-size:1rem;color:var(--text-muted);
  text-transform:uppercase;letter-spacing:.05em;margin-bottom:.8rem;
}
.references ol,.further-reading ul{padding-left:1.5rem}
.references li,.further-reading li{
  margin-bottom:.5rem;font-size:.88rem;
  color:var(--text-muted);line-height:1.6;
}
.references li a,.further-reading li a{font-size:.88rem}

/* ===== FORM ===== */
.form-group{margin-bottom:1.2rem}
.form-group label{
  display:block;margin-bottom:.35rem;
  font-size:.88rem;font-weight:600;color:var(--text);
}
.form-group input,.form-group textarea,.form-group select{
  width:100%;padding:.65rem .9rem;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);color:var(--text);
  font-family:var(--font);font-size:.95rem;transition:border-color .2s;
}
.form-group input:focus,.form-group textarea:focus{
  border-color:var(--primary-light);outline:none;
}
.form-group textarea{min-height:130px;resize:vertical}

/* ===== FOOTER ===== */
.site-footer{
  border-top:1px solid var(--border);
  padding:2.5rem 0;margin-top:auto;background:var(--bg-alt);
}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr;
  gap:2rem;margin-bottom:2rem;
}
.footer-col h4{
  font-size:.82rem;text-transform:uppercase;
  letter-spacing:.06em;color:var(--text-muted);margin-bottom:.8rem;
}
.footer-col p{font-size:.85rem;color:var(--text-muted);line-height:1.65}
.footer-col ul li{margin-bottom:.4rem}
.footer-col a{font-size:.85rem;color:var(--text-muted)}
.footer-col a:hover{color:var(--primary-light)}
.footer-bottom{
  text-align:center;padding-top:1.5rem;
  border-top:1px solid var(--border);
  font-size:.8rem;color:var(--text-muted);
}

/* ===== LEGAL ===== */
.legal-page{padding:2.5rem 0}
.legal-page h1{margin-bottom:.5rem}
.legal-page .updated{
  font-size:.85rem;color:var(--text-muted);margin-bottom:2rem;
}
.legal-page h2{
  margin-top:2rem;margin-bottom:.6rem;
  font-size:1.15rem;color:var(--accent);
}
.legal-page p,.legal-page li{line-height:1.75;font-size:.93rem}
.legal-page ul{padding-left:1.5rem;margin:.5rem 0}
.legal-page li{margin-bottom:.4rem}

/* ===== 404 ===== */
.error-page{text-align:center;padding:5rem 0}
.error-page h1{font-size:4.5rem;color:var(--primary);margin-bottom:1rem}
.error-page p{color:var(--text-muted);margin-bottom:2rem;font-size:1.05rem}

/* ===== CONTACT PAGE ===== */
.contact-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:3rem;margin:2rem 0;
}
.contact-info{background:var(--surface);padding:1.8rem;border-radius:var(--radius);border:1px solid var(--border)}
.contact-info h2{font-size:1.2rem;margin-bottom:1rem}
.contact-info dt{font-size:.78rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-top:1rem}
.contact-info dt:first-of-type{margin-top:0}
.contact-info dd{font-size:.93rem;color:var(--text);margin-top:.25rem}

/* ===== RESPONSIVE ===== */
@media(max-width:768px){
  .nav-toggle{display:block}
  .main-nav{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:var(--bg-alt);border-bottom:1px solid var(--border);padding:1rem 1.5rem;
  }
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;gap:.8rem}
  h1{font-size:1.7rem}
  h2{font-size:1.3rem}
  .hero{padding:2rem 0 1rem}
  .section{padding:2rem 0}
  .feat-grid{grid-template-columns:1fr}
  .feat-card--lg{grid-column:1;grid-row:auto}
  .feat-card--sm{grid-column:1}
  .footer-grid{grid-template-columns:1fr;gap:1.5rem}
  .contact-grid{grid-template-columns:1fr;gap:1.5rem}
  .author-box{flex-direction:column;align-items:center;text-align:center}
  .author-box img{width:64px;height:80px}
}
@media(max-width:480px){
  h1{font-size:1.45rem}
  .container{padding:0 1rem}
  .svc-item{padding:1.2rem}
}