:root{
  --blue-600:#2563eb;
  --blue-700:#1d4ed8;
  --orange:#f59e0b;
  --orange-dark:#d97706;
  --ink:#0f172a;
  --ink-soft:#1e293b;
  --slate-600:#475569;
  --slate-500:#64748b;
  --slate-200:#e2e8f0;
  --slate-100:#f1f5f9;
  --white:#ffffff;
  --green:#059669;
  --green-bg:#d1fae5;
  --violet:#4f46e5;
  --violet-bg:#e0e7ff;
  --radius:10px;
  --shadow: 0 1px 2px rgba(15,23,42,.06), 0 1px 3px rgba(15,23,42,.08);
  --shadow-md: 0 4px 10px rgba(15,23,42,.08), 0 2px 4px rgba(15,23,42,.06);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color:var(--ink);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit; text-decoration:none;}
img{max-width:100%; display:block;}
ul{margin:0; padding:0; list-style:none;}
button{font-family:inherit;}

/* ---------- Nav ---------- */
header.site-nav{
  position:sticky; top:0; z-index:100;
  background:var(--white);
  border-bottom:1px solid var(--slate-200);
}
.nav-inner{
  max-width:1180px; margin:0 auto; padding:16px 24px;
  display:flex; align-items:center; justify-content:space-between;
}
.brand{font-weight:800; font-size:17px; letter-spacing:-0.01em; color:var(--ink);}
nav.links{display:flex; gap:28px;}
nav.links a{
  font-size:14.5px; font-weight:500; color:var(--slate-600);
  padding:6px 2px; border-bottom:2px solid transparent;
  transition:color .15s ease, border-color .15s ease;
}
nav.links a:hover{color:var(--blue-700);}
nav.links a.active{color:var(--blue-700); border-bottom-color:var(--blue-700); font-weight:600;}

/* ---------- Hero bands ---------- */
.hero{
  background:linear-gradient(135deg, var(--blue-700), var(--blue-600) 55%, #3b82f6);
  color:var(--white);
  padding:72px 24px 56px;
  text-align:center;
}
.hero.small{padding:60px 24px;}
.hero-inner{max-width:900px; margin:0 auto;}
.hero h1{
  font-size:clamp(32px, 5vw, 52px);
  line-height:1.12;
  margin:0 0 22px;
  font-weight:800;
  letter-spacing:-0.02em;
}
.hero h1 .accent{color:var(--orange);}
.hero p.lede{
  font-size:17px; line-height:1.6; color:#dbeafe; max-width:640px; margin:0 auto 30px;
}
.hero-ctas{display:flex; gap:14px; justify-content:center; flex-wrap:wrap; margin-bottom:44px;}
.btn{
  display:inline-block; padding:12px 26px; border-radius:8px; font-weight:600; font-size:14.5px;
  cursor:pointer; border:1px solid transparent; transition:transform .12s ease, background .15s ease, box-shadow .15s ease;
}
.btn:active{transform:translateY(1px);}
.btn-orange{background:var(--orange); color:#1a1200;}
.btn-orange:hover{background:var(--orange-dark);}
.btn-outline{background:transparent; border-color:rgba(255,255,255,.7); color:var(--white);}
.btn-outline:hover{background:rgba(255,255,255,.12);}
.btn-blue{background:var(--blue-600); color:var(--white);}
.btn-blue:hover{background:var(--blue-700);}
.btn-ghost{background:var(--white); border-color:var(--slate-200); color:var(--ink);}
.btn-ghost:hover{background:var(--slate-100);}
.btn-sm{padding:8px 16px; font-size:13.5px;}
.btn-full{width:100%; text-align:center;}
.btn-disabled{
  background:var(--slate-100); color:var(--slate-500); border-color:var(--slate-200);
  cursor:not-allowed; pointer-events:none;
}

/* Real media (images from D1) inside gradient-fallback containers */
.media-img{position:absolute; inset:0; width:100%; height:100%; object-fit:cover; display:block;}
.media-fallback{position:absolute; inset:0; width:100%; height:100%;}
.video-frame-img{position:static; width:100%; height:100%; border-radius:inherit;}
.book-cover.has-image{padding:0;}
.book-cover-img{width:100%; height:100%; object-fit:cover; display:block; border-radius:inherit;}
.cover-strip.has-image{padding:0; overflow:hidden;}
.cover-strip-img{width:100%; height:100%; object-fit:cover; display:block;}

.stats-row{
  display:flex; justify-content:center; gap:64px; flex-wrap:wrap;
}
.stat .num{font-size:34px; font-weight:800; color:var(--orange);}
.stat .label{font-size:13px; color:#dbeafe; margin-top:2px;}

/* ---------- Logos ---------- */
.logos-section{padding:44px 0; text-align:center; border-bottom:1px solid var(--slate-200);}
.logos-eyebrow{font-size:12px; letter-spacing:.14em; color:var(--slate-500); font-weight:700; margin-bottom:26px; padding:0 24px;}

/* Infinite scroll: .logos-track holds TWO copies of the logo set back to
   back (see index.html) and animates from 0 to -50%, so it appears to
   scroll forever with no visible seam. */
.logos-marquee{
  overflow:hidden; width:100%;
  -webkit-mask-image: linear-gradient(90deg, transparent, black 6%, black 94%, transparent);
  mask-image: linear-gradient(90deg, transparent, black 6%, black 94%, transparent);
}
.logos-track{
  display:flex; align-items:center; gap:56px; width:max-content;
  animation: logos-scroll 32s linear infinite;
}
.logos-marquee:hover .logos-track{animation-play-state:paused;}
@keyframes logos-scroll{
  from{transform:translateX(0);}
  to{transform:translateX(-50%);}
}
@media (prefers-reduced-motion: reduce){
  .logos-track{animation:none;}
}

.logo-item{display:flex; flex-direction:column; align-items:center; gap:8px; min-width:90px; opacity:.85; flex:none;}
.logo-img{height:32px; width:auto; max-width:120px; object-fit:contain; filter:grayscale(1); opacity:.75; transition:filter .2s ease, opacity .2s ease;}
.logo-item:hover .logo-img{filter:grayscale(0); opacity:1;}
.logo-mark{
  width:34px; height:34px; border-radius:8px; background:var(--ink);
  color:var(--white); display:flex; align-items:center; justify-content:center; font-size:15px; font-weight:800;
}
.logo-item span{font-size:12.5px; color:var(--slate-600); font-weight:600; white-space:nowrap;}

/* ---------- Sections generic ---------- */
section{padding:64px 24px;}
.section-inner{max-width:1180px; margin:0 auto;}
.section-head{text-align:center; margin-bottom:40px;}
.section-head h2{font-size:30px; font-weight:800; letter-spacing:-0.01em; margin:0 0 10px;}
.section-head p{color:var(--slate-600); font-size:15.5px; max-width:560px; margin:0 auto;}
.bg-slate{background:var(--slate-100);}

/* ---------- Card grid (featured work / courses / articles) ---------- */
.card-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:24px;}
.card{
  background:var(--white); border:1px solid var(--slate-200); border-radius:var(--radius);
  overflow:hidden; box-shadow:var(--shadow); display:flex; flex-direction:column;
  transition:box-shadow .18s ease, transform .18s ease;
}
.card:hover{box-shadow:var(--shadow-md); transform:translateY(-2px);}
.card-media{
  height:160px; position:relative; overflow:hidden;
  display:flex; align-items:center; justify-content:center;
  color:var(--white); font-weight:700;
}
.card-body{padding:20px; display:flex; flex-direction:column; gap:8px; flex:1;}
.card-body h3{font-size:17px; margin:0; font-weight:700;}
.card-body p{font-size:13.8px; color:var(--slate-600); line-height:1.55; margin:0; flex:1;}
.card-link{font-size:13.5px; font-weight:600; color:var(--blue-700); margin-top:6px;}
.card-link:hover{text-decoration:underline;}

.media-training{background:linear-gradient(135deg,#0ea5e9,#1e3a8a);}
.media-copy{background:linear-gradient(135deg,#f8fafc,#cbd5e1); color:var(--ink-soft);}
.media-pub{background:linear-gradient(135deg,#0f172a,#1e3a8a);}

/* ---------- About ---------- */
.about-grid{
  display:grid; grid-template-columns:380px 1fr; gap:56px; align-items:center;
}
.about-photo{
  border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow-md);
  aspect-ratio:5/6.2; background:linear-gradient(160deg,#334155,#0f172a);
  display:flex; align-items:center; justify-content:center; color:#94a3b8;
}
.about-photo .avatar{
  width:96px; height:96px; border-radius:50%; background:linear-gradient(135deg,var(--orange),#f97316);
  display:flex; align-items:center; justify-content:center; font-size:34px; font-weight:800; color:#1a1200;
}
.about-photo-img{width:100%; height:100%; object-fit:cover; display:block;}
.about-copy h2{font-size:28px; font-weight:800; margin:0 0 16px;}
.about-copy p{color:var(--slate-600); font-size:15.5px; line-height:1.7; margin:0 0 18px;}
.about-list{display:flex; flex-direction:column; gap:10px;}
.about-list li{display:flex; gap:10px; align-items:flex-start; font-size:14.5px; color:var(--ink-soft);}
.check{
  flex:none; width:19px; height:19px; border-radius:50%; background:var(--blue-600); color:#fff;
  display:flex; align-items:center; justify-content:center; font-size:11px; margin-top:2px;
}

/* ---------- Footer ---------- */
footer.site-footer{background:var(--ink); color:#94a3b8; padding:48px 24px 26px; text-align:center;}
footer.site-footer .brand{color:var(--white); font-size:18px; font-weight:800; margin-bottom:10px;}
footer.site-footer p{max-width:520px; margin:0 auto 20px; font-size:14px; line-height:1.6;}
.footer-social{display:flex; gap:14px; justify-content:center; margin-bottom:22px;}
.footer-social span{
  width:34px; height:34px; border-radius:50%; border:1px solid #334155;
  display:flex; align-items:center; justify-content:center; font-size:13px; color:#cbd5e1;
}
footer.site-footer .rule{border-top:1px solid #1e293b; padding-top:18px; font-size:12.5px; color:#64748b;}
.footer-links{display:flex; gap:18px; justify-content:center; flex-wrap:wrap; margin-bottom:18px; font-size:13px;}
.footer-links a{color:#cbd5e1;}
.footer-links a:hover{color:var(--white); text-decoration:underline;}

/* ---------- Courses page ---------- */
.featured-course{
  display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center; margin-bottom:56px;
}
.featured-course .kicker{font-size:13px; font-weight:700; color:var(--blue-700); text-transform:uppercase; letter-spacing:.06em; margin-bottom:8px;}
.featured-course .course-title{font-size:24px; font-weight:800; color:var(--blue-700); margin:2px 0 14px;}
.featured-course p{color:var(--slate-600); font-size:15px; line-height:1.65; margin-bottom:18px;}
.meta-row{display:flex; flex-direction:column; gap:9px; font-size:14px; color:var(--ink-soft); margin-bottom:8px;}
.meta-row .m{display:flex; align-items:center; gap:8px;}
.video-frame{
  background:var(--ink); border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow-md);
  aspect-ratio:16/10; position:relative; display:flex; align-items:center; justify-content:center;
}
.video-frame .top-bar{position:absolute; top:0; left:0; right:0; height:26px; background:#1e293b; display:flex; align-items:center; padding:0 10px; gap:6px;}
.video-frame .top-bar span{width:8px; height:8px; border-radius:50%; background:#475569;}
.play-btn{
  width:60px; height:60px; border-radius:50%; background:rgba(255,255,255,.15); border:2px solid rgba(255,255,255,.5);
  display:flex; align-items:center; justify-content:center; color:#fff; font-size:22px;
}
.video-frame .code-lines{position:absolute; top:34px; left:16px; right:16px; opacity:.35; font-family:monospace; font-size:10px; color:#38bdf8; line-height:1.6; text-align:left;}

.platform-group{margin-bottom:44px;}
.platform-group h3{font-size:19px; font-weight:800; margin:0 0 20px; padding-top:20px; border-top:1px solid var(--slate-200);}
.platform-group:first-of-type h3{border-top:none; padding-top:0;}
.course-card .card-media{height:120px; font-size:12px;}
.course-card .tag-strip{
  position:absolute; top:0; left:0; right:0; padding:14px 16px; background:rgba(15,23,42,.55);
  text-align:left; font-weight:800; font-size:15px; line-height:1.25;
}
.course-card .platform-label{font-size:10.5px; letter-spacing:.08em; opacity:.85; text-transform:uppercase; display:block; margin-bottom:2px; font-weight:700;}
.course-card .card-footer{display:flex; align-items:flex-end; justify-content:space-between; margin-top:auto; padding-top:6px;}
.course-card .src{font-size:12px; color:var(--slate-500);}
.course-card .src b{display:block; color:var(--slate-600); font-weight:600;}

/* ---------- Copywriting page ---------- */
.filter-tabs{display:flex; justify-content:center; gap:10px; margin:-30px auto 46px; flex-wrap:wrap;}
.filter-tab{
  padding:9px 20px; border-radius:8px; font-size:13.8px; font-weight:600;
  border:1px solid var(--slate-200); background:var(--white); color:var(--slate-600);
  cursor:pointer; font-family:inherit; transition:background .15s ease, color .15s ease, border-color .15s ease;
}
.filter-tab:hover{border-color:var(--blue-600); color:var(--blue-700);}
.filter-tab.active{background:var(--blue-600); color:var(--white); border-color:var(--blue-600);}
.loading-msg{grid-column:1/-1; text-align:center; color:var(--slate-500); font-size:14px; padding:24px 0;}

.article-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:22px;}
.article-card{
  border:1px solid var(--slate-200); border-radius:var(--radius); overflow:hidden; background:var(--white);
  box-shadow:var(--shadow); display:flex; flex-direction:column; transition:box-shadow .18s ease, transform .18s ease;
}
.article-card:hover{box-shadow:var(--shadow-md); transform:translateY(-2px);}
.article-media{height:132px;}
.article-body{padding:18px; display:flex; flex-direction:column; gap:9px; flex:1;}
.tag-row{display:flex; align-items:center; gap:8px;}
.tag{font-size:11px; font-weight:700; padding:3px 9px; border-radius:5px;}
.tag.technical{background:var(--green-bg); color:var(--green);}
.tag.strategic{background:var(--violet-bg); color:var(--violet);}
.src-name{font-size:12.5px; color:var(--slate-500); font-weight:500;}
.article-body h3{font-size:15.5px; font-weight:700; margin:0; line-height:1.35;}
.article-body p{font-size:13px; color:var(--slate-600); line-height:1.55; margin:0; flex:1;}
.article-foot{display:flex; align-items:center; justify-content:space-between; margin-top:6px;}
.article-foot .date{font-size:12px; color:var(--slate-500);}
.article-foot .rd{font-size:12.5px; font-weight:600; color:var(--blue-700);}
.article-foot .rd:hover{text-decoration:underline;}

/* ---------- Publications page ---------- */
.book-feature{display:grid; grid-template-columns:300px 1fr; gap:48px; align-items:center; margin-bottom:60px;}
.book-cover{
  aspect-ratio:5/7; border-radius:8px; box-shadow:var(--shadow-md); overflow:hidden;
  background:radial-gradient(circle at 30% 20%, #1e3a8a, #0f172a 70%); position:relative;
  display:flex; flex-direction:column; justify-content:center; padding:26px; color:#fff;
}
.book-cover .btitle{font-size:22px; font-weight:900; line-height:1.15; letter-spacing:-0.01em;}
.book-cover .bsub{font-size:11px; color:#cbd5e1; margin-top:10px; letter-spacing:.04em;}
.book-cover .bpub{position:absolute; bottom:18px; left:26px; right:26px; display:flex; justify-content:space-between; font-size:11px; color:#94a3b8;}
.book-info h3{font-size:26px; font-weight:800; margin:0 0 12px;}
.book-info p{color:var(--slate-600); font-size:15px; line-height:1.65; margin-bottom:18px;}
.book-meta{display:flex; flex-direction:column; gap:8px; font-size:14px; color:var(--ink-soft); margin-bottom:20px;}
.book-meta .m{display:flex; align-items:center; gap:8px;}
.btn-row{display:flex; gap:12px; flex-wrap:wrap;}

.books-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:24px;}
.book-card{border:1px solid var(--slate-200); border-radius:var(--radius); overflow:hidden; background:var(--white); box-shadow:var(--shadow);}
.book-card .cover-strip{height:170px; display:flex; align-items:center; justify-content:center; text-align:center; padding:14px; color:#fff; font-weight:800; font-size:16px; line-height:1.3;}
.book-card .cover-strip.a{background:linear-gradient(160deg,#2563eb,#1e3a8a);}
.book-card .cover-strip.b{background:radial-gradient(circle at 30% 20%, #1e3a8a, #0f172a 70%);}
.book-card .cbody{padding:18px;}
.book-card h4{font-size:16px; margin:0 0 8px;}
.book-card p{font-size:13.5px; color:var(--slate-600); line-height:1.55; margin:0 0 14px;}
.book-card .stat-row{display:flex; justify-content:space-between; font-size:12.5px; color:var(--slate-500); margin-bottom:14px;}
.book-card .btn-row{display:flex; gap:10px;}
.book-card .btn{flex:1; text-align:center; padding:9px 10px; font-size:13px;}

.journal-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:20px;}
.journal-card{background:var(--white); border:1px solid var(--slate-200); border-radius:var(--radius); padding:22px; box-shadow:var(--shadow);}
.jtag{display:inline-block; font-size:11px; font-weight:700; color:var(--blue-700); background:#dbeafe; padding:3px 10px; border-radius:5px; margin-bottom:12px;}
.journal-card h4{font-size:16px; margin:0 0 10px; line-height:1.4;}
.jmeta{font-size:12.5px; color:var(--slate-500); margin-bottom:4px;}
.jdesc{font-size:13px; color:var(--slate-600); line-height:1.55; margin:10px 0 14px;}
.jlink{font-size:13px; font-weight:600; color:var(--blue-700); border-top:1px solid var(--slate-200); padding-top:12px; display:block;}

/* ---------- Contact page ---------- */
.contact-grid{display:grid; grid-template-columns:1.3fr 1fr; gap:32px; align-items:start;}
.contact-form{
  background:var(--white); border:1px solid var(--slate-200); border-radius:var(--radius);
  padding:30px; box-shadow:var(--shadow);
}
.contact-form h3{font-size:19px; font-weight:800; margin:0 0 22px;}
.form-row{display:grid; grid-template-columns:1fr 1fr; gap:16px; margin-bottom:16px;}
.field{display:flex; flex-direction:column; gap:6px; margin-bottom:16px;}
.field label{font-size:13px; font-weight:600; color:var(--ink-soft);}
.field input, .field select, .field textarea{
  border:1px solid var(--slate-200); border-radius:7px; padding:10px 12px; font-size:14px; font-family:inherit;
  color:var(--ink); background:var(--white); width:100%;
}
.field input:focus, .field select:focus, .field textarea:focus{outline:2px solid var(--blue-600); outline-offset:1px; border-color:var(--blue-600);}
.field textarea{resize:vertical; min-height:96px;}
.hp-field{position:absolute; left:-9999px; width:1px; height:1px; overflow:hidden;}
.form-status{
  padding:12px 16px; border-radius:8px; font-size:13.5px; font-weight:600; margin-bottom:16px;
}
.form-status.success{background:#ecfdf5; border:1px solid #a7f3d0; color:#065f46;}
.form-status.error{background:#fef2f2; border:1px solid #fecaca; color:#991b1b;}

.contact-side{display:flex; flex-direction:column; gap:22px;}
.info-card{background:var(--slate-100); border-radius:var(--radius); padding:24px;}
.info-card h3{font-size:17px; font-weight:800; margin:0 0 18px;}
.info-item{display:flex; gap:12px; margin-bottom:16px; align-items:flex-start;}
.info-item:last-child{margin-bottom:0;}
.icon-badge{
  flex:none; width:36px; height:36px; border-radius:8px; background:var(--blue-600); color:#fff;
  display:flex; align-items:center; justify-content:center; font-size:15px;
}
.info-item b{display:block; font-size:14px; margin-bottom:2px;}
.info-item span{font-size:13.5px; color:var(--slate-600);}
.office-photo{
  border-radius:var(--radius); overflow:hidden; aspect-ratio:4/3; box-shadow:var(--shadow);
  background:linear-gradient(160deg,#e2e8f0,#94a3b8); display:flex; align-items:center; justify-content:center; color:#475569;
}
.office-photo-img{width:100%; height:100%; object-fit:cover; display:block;}
.office-photo-fallback{width:100%; height:100%; display:flex; align-items:center; justify-content:center;}

/* ---------- Responsive ---------- */
@media (max-width: 880px){
  nav.links{gap:14px; flex-wrap:wrap; justify-content:flex-end;}
  .card-grid, .article-grid{grid-template-columns:1fr;}
  .about-grid, .featured-course, .book-feature, .contact-grid, .books-grid, .journal-grid{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .stats-row{gap:34px;}
}