/* ============================================================
   AVENTRAC — brand tokens
   ============================================================ */
:root{
  --ink:        #EDEBE6;   /* off-white text */
  --purple-deep:#4A3868;   /* muted deep purple for gradients/glows */
  --purple:     #B9A0DE;   /* brand accent — brightened for contrast on dark */
  --purple-mid: #CBB6E8;
  --lilac:      #A78FCE;
  --tint:       #161614;   /* dark alternate section background */
  --paper:      #1A1A18;   /* main background — blackish grey */
  --paper-warm: #232321;   /* card background, lifted from page bg */
  --ink-soft:   #BEB9AF;   /* body copy */
  --ink-faint:  #9B968C;   /* captions, meta — AA checked on page and card */
  --line:       #35332E;   /* hairlines */

  /* Fixed brand-dark panel — footer, CTA band, active chips */
  --panel-ink:        #121110;
  --panel-purple-deep:#362A4A;
  --header-bg: rgba(26,26,24,.88);

  --display: "Space Grotesk", "Inter", -apple-system, sans-serif;
  --body:    "Inter", -apple-system, "Segoe UI", sans-serif;
  --mono:    "JetBrains Mono", "SFMono-Regular", Menlo, monospace;

  --container: 1180px;
}

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible{
  outline:2px solid var(--purple-mid);
  outline-offset:2px;
}
.skip-link{
  position:absolute;
  left:-999px;
  top:auto;
  background:var(--panel-ink);
  color:#fff;
  padding:12px 20px;
  z-index:100;
  border-radius:0 0 4px 0;
  font-size:14px;
  font-weight:600;
}
.skip-link:focus{
  left:0;
  top:0;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  transition:background-color .25s ease, color .25s ease;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }

h1,h2,h3,h4{
  font-family:var(--display);
  font-weight:600;
  color:var(--ink);
  margin:0 0 .5em;
  letter-spacing:-0.02em;
}

.wrap{
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}

.eyebrow{
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--purple);
  display:inline-flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:"";
  width:16px;
  height:1px;
  background:var(--purple);
  display:inline-block;
}

/* ---------- header ---------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:var(--header-bg);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height:78px;
}
.brand{ display:flex; align-items:center; gap:12px; }
.brand img{ height:40px; width:auto; }
.brand span{
  font-family:var(--display);
  font-weight:600;
  font-size:19px;
  letter-spacing:.06em;
  color:var(--ink);
}
.nav-links{ display:flex; align-items:center; gap:36px; }
/* ---------- scroll progress bar ---------- */
#scroll-progress{
  position:fixed;
  top:0; left:0;
  height:3px;
  width:0%;
  background:linear-gradient(90deg, #6C7CF0, #B9A0DE, #8AB4FF);
  z-index:200;
  transition:width .1s linear;
}

/* ---------- glitch hover ---------- */
.glitch-hover{ position:relative; display:inline-block; }
.glitch-hover:hover{ animation:glitch-flicker .38s steps(2,end); }
@keyframes glitch-flicker{
  0%{ text-shadow:none; transform:translate(0,0); }
  12%{ text-shadow:-2px 0 #8AB4FF, 2px 0 #B9A0DE; transform:translate(-1px,0); }
  24%{ text-shadow:2px 0 #8AB4FF, -2px 0 #B9A0DE; transform:translate(1px,0); }
  36%{ text-shadow:-1px 0 #8AB4FF, 1px 0 #B9A0DE; transform:translate(0,1px); }
  48%{ text-shadow:1px 0 #8AB4FF, -1px 0 #B9A0DE; transform:translate(0,-1px); }
  60%{ text-shadow:-2px 0 #8AB4FF, 2px 0 #B9A0DE; transform:translate(-1px,0); }
  75%{ text-shadow:none; transform:translate(0,0); }
  100%{ text-shadow:none; transform:translate(0,0); }
}
@media (prefers-reduced-motion: reduce){
  .glitch-hover:hover{ animation:none; }
}
.card:hover h3, .pillar:hover h3, .tut-card:hover h3{
  animation:glitch-flicker .38s steps(2,end);
}

.nav-links a{
  font-size:14.5px;
  font-weight:500;
  color:var(--ink-soft);
  transition:color .15s ease;
}
.nav-links a:hover{ color:var(--purple); }
.nav-links a.current{ color:var(--purple); }
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:11px 22px;
  border-radius:3px;
  font-size:14px; font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:all .18s ease;
}
.btn-primary{ background:var(--ink); color:var(--paper-warm); }
.btn-primary:hover{ background:var(--purple); }
.btn-ghost{ border-color:var(--ink); color:var(--ink); }
.btn-ghost:hover{ background:var(--ink); color:var(--paper-warm); }
.btn-light{ border-color:rgba(255,255,255,.5); color:#fff; }
.btn-light:hover{ background:#fff; color:var(--panel-ink); }

.nav-dropdown{ position:relative; }
.nav-dropdown summary{
  cursor:pointer;
  list-style:none;
  font-size:14.5px;
  font-weight:500;
  color:var(--ink-soft);
  display:flex;
  align-items:center;
  gap:5px;
  transition:color .15s ease;
}
.nav-dropdown summary::-webkit-details-marker{ display:none; }
.nav-dropdown summary::marker{ content:""; }
.nav-dropdown summary::after{
  content:"";
  width:6px; height:6px;
  border-right:1.5px solid currentColor;
  border-bottom:1.5px solid currentColor;
  transform:rotate(45deg);
  margin-top:-3px;
  transition:transform .15s ease;
}
.nav-dropdown[open] summary::after{ transform:rotate(-135deg); margin-top:3px; }
.nav-dropdown summary:hover{ color:var(--purple); }
.nav-dropdown[open] summary{ color:var(--purple); }
.nav-dropdown .dropdown-menu{
  position:absolute;
  top:calc(100% + 16px);
  left:50%;
  transform:translateX(-50%);
  background:var(--paper-warm);
  border:1px solid var(--line);
  border-radius:8px;
  box-shadow:0 24px 48px rgba(46,24,84,.16);
  padding:10px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:2px;
  width:340px;
  z-index:60;
}
.dropdown-menu a{
  display:block;
  padding:9px 12px;
  border-radius:5px;
  font-size:13.5px;
  font-weight:500;
  color:var(--ink-soft);
  transition:all .12s ease;
}
.dropdown-menu a:hover{ background:var(--tint); color:var(--purple); }

.mobile-toggle{
  display:none;
  background:none; border:none; cursor:pointer;
  width:36px; height:36px;
  flex-direction:column; align-items:center; justify-content:center; gap:5px;
}
.mobile-toggle span{ width:22px; height:2px; background:var(--ink); display:block; }

/* ---------- hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  background:
    linear-gradient(90deg, rgba(18,17,16,.88) 0%, rgba(18,17,16,.62) 42%, rgba(18,17,16,.3) 75%),
    radial-gradient(circle at 82% 18%, rgba(75,42,130,.22), transparent 55%),
    url('assets/photos/bridge-hero.jpg') center 55%/cover no-repeat,
    var(--paper);
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:56px 56px;
  opacity:.18;
  -webkit-mask-image:linear-gradient(180deg, rgba(0,0,0,.9), transparent 85%);
  mask-image:linear-gradient(180deg, rgba(0,0,0,.9), transparent 85%);
  pointer-events:none;
}
.hero .wrap{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:64px;
  align-items:center;
  padding-top:44px;
  padding-bottom:88px;
}
.hero h1{
  font-size:clamp(38px,4.6vw,60px);
  line-height:1.06;
  margin:18px 0 22px;
}
.hero h1 em{
  font-style:italic;
  color:var(--purple);
}
.hero p.lead{
  font-size:18px;
  color:var(--ink-soft);
  max-width:46ch;
  margin:0 0 34px;
}
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; }

/* ---------- stats bar ---------- */
.stats-bar{
  border-bottom:1px solid var(--line);
  background:var(--paper-warm);
}
.stats-bar .wrap{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  padding:36px 32px;
}
.stat-block{
  padding:0 32px;
  border-left:1px solid var(--line);
}
.stat-block:first-child{ border-left:none; padding-left:0; }
.stat-block .num{
  font-family:var(--mono);
  font-size:34px;
  font-weight:600;
  color:var(--ink);
  letter-spacing:-0.02em;
  line-height:1;
}
.stat-block .label{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--ink-faint);
  margin-top:8px;
  text-transform:uppercase;
}

/* ---------- network node diagram ---------- */
.network-viz{
  position:relative;
  width:100%;
  height:100%;
  min-height:220px;
}
.network-viz canvas{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  display:block;
}
.network-section{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.network-section .network-viz{
  position:absolute;
  inset:0;
  opacity:.85;
}
.network-section .wrap{ position:relative; z-index:1; }

/* ---------- hero terminal (matrix-style) ---------- */
.hero-terminal{
  width:100%;
  max-width:420px;
  justify-self:end;
  background:#08070C;
  border:1px solid rgba(139,110,197,.3);
  border-radius:10px;
  overflow:hidden;
  box-shadow:0 30px 70px rgba(0,0,0,.5), 0 0 0 1px rgba(90,130,240,.08);
}
.terminal-bar{
  display:flex;
  align-items:center;
  gap:8px;
  padding:12px 16px;
  background:rgba(139,110,197,.07);
  border-bottom:1px solid rgba(139,110,197,.22);
}
.terminal-bar .dot{ width:11px; height:11px; border-radius:50%; }
.terminal-bar .dot-red{ background:#FF5F56; }
.terminal-bar .dot-yellow{ background:#FFBD2E; }
.terminal-bar .dot-green{ background:#27C93F; }
.terminal-bar .terminal-title{
  margin-left:8px;
  font-family:var(--mono);
  font-size:12px;
  color:#8B7EAD;
  letter-spacing:.02em;
}
.terminal-canvas-wrap{
  position:relative;
  height:280px;
}
#matrix-canvas{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  display:block;
}
.terminal-content{
  position:relative;
  z-index:1;
  height:100%;
  display:flex;
  flex-direction:column;
}
.terminal-body{
  flex:1;
  overflow-y:auto;
  padding:26px 24px 10px;
  font-family:var(--mono);
  font-size:13px;
  line-height:1.95;
  background:linear-gradient(180deg, rgba(8,7,12,.55), rgba(8,7,12,.72));
}
.terminal-input-row{
  flex-shrink:0;
  display:flex;
  align-items:center;
  gap:9px;
  padding:12px 24px;
  background:rgba(8,7,12,.82);
  border-top:1px solid rgba(139,110,197,.2);
}
.terminal-input-row .t-prompt{
  font-family:var(--mono);
  font-size:13px;
  color:#8AB4FF;
}
.terminal-input{
  flex:1;
  background:none;
  border:none;
  outline:none;
  font-family:var(--mono);
  font-size:13px;
  color:#EDEBE6;
  caret-color:#8AB4FF;
}
.terminal-input::placeholder{ color:#5A5470; }
.terminal-input:disabled{ opacity:.4; }
.terminal-body .t-line{ white-space:pre; text-shadow:0 0 12px rgba(96,165,250,.35); }
.terminal-body .t-prompt{ color:#8AB4FF; }
.terminal-body .t-line span:not(.t-prompt){ color:#C9B8F0; }
.terminal-cursor{
  display:inline-block;
  width:8px; height:15px;
  background:#8AB4FF;
  vertical-align:middle;
  margin-left:2px;
  box-shadow:0 0 8px rgba(138,180,255,.7);
  animation:t-blink 1s step-end infinite;
}
@keyframes t-blink{ 50%{ opacity:0; } }

/* ---------- photo band ---------- */
.photo-band{
  position:relative;
  height:340px;
  overflow:hidden;
}
.photo-band img{
  width:100%; height:100%;
  object-fit:cover;
  display:block;
  filter:grayscale(20%) brightness(.55);
}
.photo-band::after{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(18,17,16,.15), rgba(18,17,16,.85));
}
.photo-band .band-caption{
  position:absolute; left:0; right:0; bottom:0;
  padding:36px;
}
.photo-band .band-caption p{
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--ink-soft);
  max-width:50ch;
  margin:0;
}

/* ---------- photo gallery ---------- */
.photo-gallery{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:2px;
}
.photo-gallery figure{
  margin:0;
  position:relative;
  aspect-ratio:3/4;
  overflow:hidden;
}
.photo-gallery img{
  width:100%; height:100%;
  object-fit:cover;
  display:block;
  filter:grayscale(25%) brightness(.65);
  transform:scale(1.03);
  transition:filter .4s ease, transform .5s ease;
}
.photo-gallery figure:hover img{ filter:grayscale(0%) brightness(.85); transform:scale(1.1); }
.photo-gallery figcaption{
  position:absolute; left:0; right:0; bottom:0;
  padding:16px;
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:#fff;
  background:linear-gradient(180deg, transparent, rgba(0,0,0,.75));
}

/* ---------- section scaffolding ---------- */
section{ padding:96px 0; }
.section-tint{ background:var(--tint); }
.section-ink{ background:var(--panel-ink); color:#EFEAF8; }
.section-ink h2, .section-ink h3{ color:#fff; }
.section-head{
  max-width:640px;
  margin-bottom:52px;
}
.section-head h2{ font-size:clamp(28px,3vw,38px); margin-top:14px; }
.section-head p{ color:var(--ink-soft); font-size:16.5px; }
.section-ink .section-head p{ color:#C9BEE0; }

/* ---------- pillars ---------- */
.pillars{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.pillar{
  background:var(--paper-warm);
  padding:40px 34px;
  transition:background .2s ease;
}
.pillar:hover{ background:var(--tint); }
.pillar-photo{
  margin:-40px -34px 28px;
  height:150px;
  overflow:hidden;
  position:relative;
}
.pillar-photo img{
  width:100%; height:100%;
  object-fit:cover;
  display:block;
  filter:grayscale(20%) brightness(.7);
  transform:scale(1.02);
  transition:filter .3s ease, transform .4s ease;
}
.pillar:hover .pillar-photo img{ filter:grayscale(0%) brightness(.85); transform:scale(1.08); }
.pillar-photo::after{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(18,17,16,0) 45%, rgba(26,26,24,.92) 100%);
}
.pillar .mark{
  width:44px; height:44px;
  border:1.5px solid var(--purple);
  border-radius:8px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:24px;
  color:var(--purple);
}
.pillar h3{ font-size:20px; margin-bottom:10px; }
.pillar p{ color:var(--ink-soft); font-size:15px; margin:0 0 18px; }
.pillar a{ font-size:13.5px; font-weight:600; color:var(--purple); }
.pillar a::after{ content:" →"; }

/* ---------- article cards ---------- */
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:30px;
}
.card{
  background:var(--paper-warm);
  border:1px solid var(--line);
  border-radius:6px;
  overflow:hidden;
  display:flex; flex-direction:column;
  transition:transform .2s ease, box-shadow .2s ease;
}
.card:hover{
  transform:translateY(-4px);
  box-shadow:0 20px 40px rgba(46,24,84,.10);
}
.card-cover{
  width:100%;
  height:168px;
  object-fit:cover;
  display:block;
  background:var(--panel-ink);
}
.card-body{ padding:26px 26px 30px; display:flex; flex-direction:column; flex:1; }
.tag{
  align-self:flex-start;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--purple);
  background:var(--tint);
  border:1px solid var(--line);
  border-radius:5px;
  padding:5px 12px;
  margin-bottom:16px;
}
.card h3{ font-size:19px; line-height:1.32; margin-bottom:10px; }
.card p{ color:var(--ink-soft); font-size:14.5px; margin:0 0 18px; flex:1; }
.card .meta{
  font-family:var(--mono);
  font-size:11.5px;
  color:var(--ink-faint);
  border-top:1px solid var(--line);
  padding-top:14px;
}

/* ---------- category strip ---------- */
.cat-strip{
  display:flex; flex-wrap:wrap; gap:10px;
}
.cat-chip{
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.04em;
  padding:9px 16px;
  border:1px solid var(--line);
  border-radius:6px;
  color:var(--ink-soft);
  background:var(--paper-warm);
  transition:all .15s ease;
  cursor:pointer;
  appearance:none;
  -webkit-appearance:none;
  font-weight:inherit;
}
button.cat-chip{ font-family:var(--mono); }
.cat-chip:hover{ border-color:var(--purple-mid); color:var(--purple); }
.cat-chip.active{ background:var(--panel-ink); border-color:var(--panel-ink); color:#fff; }

/* ---------- founder / about strip ---------- */
.about-split{
  display:grid;
  grid-template-columns:.8fr 1.2fr;
  gap:64px;
  align-items:center;
}
.seal{
  width:180px; height:180px;
  border-radius:50%;
  border:1.5px solid var(--lilac);
  display:flex; align-items:center; justify-content:center;
  position:relative;
}
.seal::before{
  content:"";
  position:absolute; inset:12px;
  border:1px solid rgba(155,127,196,.5);
  border-radius:50%;
}
.seal img{ width:88px; }

/* ---------- CTA band ---------- */
.cta-band{
  background:linear-gradient(135deg, var(--panel-ink), var(--panel-purple-deep));
  color:#fff;
  border-radius:6px;
  padding:64px 60px;
  display:flex; align-items:center; justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
}
.cta-band h2{ color:#fff; font-size:30px; max-width:20ch; margin:0; }
.cta-band p{ color:#C9BEE0; margin:10px 0 0; }

/* ---------- footer ---------- */
footer{
  background:var(--panel-ink);
  color:#B8AFCF;
  padding:72px 0 32px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.2fr 1fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:48px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand{ display:flex; align-items:center; gap:10px; margin-bottom:16px; }
.footer-brand img{ height:32px; }
.footer-brand span{ font-family:var(--display); color:#fff; font-size:17px; letter-spacing:.05em; }
footer p.tagline{ font-size:14px; max-width:34ch; color:#9E93BC; }
footer h4{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:#fff;
  margin-bottom:16px;
}
footer ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:11px; }
footer a{ font-size:14px; color:#B8AFCF; transition:color .15s; }
footer a:hover{ color:#fff; }
.footer-bottom{
  padding-top:28px;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
  font-size:13px; color:#786C99;
}

/* ---------- form ---------- */
.form-card{
  background:var(--paper-warm);
  border:1px solid var(--line);
  border-radius:6px;
  padding:44px;
}
.field{ margin-bottom:20px; }
.field label{
  display:block;
  font-size:13px; font-weight:600;
  margin-bottom:8px;
  color:var(--ink);
}
.field input, .field select, .field textarea{
  width:100%;
  padding:12px 14px;
  border:1px solid var(--line);
  border-radius:3px;
  font-family:var(--body);
  font-size:14.5px;
  background:var(--paper);
  color:var(--ink);
}
.field textarea{ resize:vertical; min-height:120px; }
.field input:focus, .field select:focus, .field textarea:focus{
  outline:2px solid var(--purple-mid);
  outline-offset:1px;
}

/* ---------- reveal on scroll ---------- */
.reveal{ opacity:0; transform:translateY(16px); transition:opacity .6s ease, transform .6s ease; }
.reveal.in{ opacity:1; transform:translateY(0); }

/* ---------- misc page header ---------- */
.page-hero{
  padding:72px 0 56px;
  border-bottom:1px solid var(--line);
  background:var(--tint);
}
.page-hero.has-photo{
  background:
    linear-gradient(180deg, rgba(18,17,16,.6), rgba(18,17,16,.94)),
    var(--hero-photo) center/cover no-repeat;
}
.page-hero h1{ font-size:clamp(32px,4vw,46px); }
.page-hero p{ color:var(--ink-soft); font-size:17px; max-width:60ch; margin-top:14px; }

/* ---------- contact ---------- */
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1.3fr;
  gap:56px;
  align-items:flex-start;
}

/* ---------- article pages ---------- */
.article-hero-cover{
  width:100%;
  max-height:360px;
  object-fit:cover;
  display:block;
  border-bottom:1px solid var(--line);
}
.article-body{ max-width:700px; }
.article-meta{
  display:flex; align-items:center; gap:14px;
  font-family:var(--mono); font-size:12.5px; color:var(--ink-faint);
  margin-top:18px;
}
.article-meta .dot{ width:3px; height:3px; border-radius:50%; background:var(--ink-faint); }
.article-body p{
  color:var(--ink-soft);
  font-size:16.5px;
  line-height:1.8;
  margin:0 0 22px;
}
.article-body h2{ font-size:21px; margin-top:38px; margin-bottom:14px; }
.article-body a{ color:var(--purple); font-weight:600; }
.sources{
  margin-top:56px;
  padding-top:32px;
  border-top:1px solid var(--line);
}
.sources h3{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--ink-faint);
  margin-bottom:16px;
}
.sources ol{ margin:0; padding-left:20px; }
.sources li{ font-size:14px; color:var(--ink-soft); margin-bottom:10px; line-height:1.6; }
.sources a{ color:var(--purple); font-weight:600; word-break:break-word; }
.back-link{
  display:inline-flex; align-items:center; gap:8px;
  font-size:13.5px; font-weight:600; color:var(--purple);
  margin-bottom:28px;
}
.back-link::before{ content:"←"; }

/* ---------- tutorials ---------- */
.level-badge{
  font-family:var(--mono);
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.08em;
  text-transform:uppercase;
  padding:4px 10px;
  border-radius:4px;
  display:inline-block;
}
.level-beginner{ background:var(--tint); color:var(--purple-mid); border:1px solid var(--line); }
.level-intermediate{ background:var(--purple-deep); color:#fff; }
.level-advanced{ background:var(--panel-ink); color:#fff; }

.tutorial-section{ margin-bottom:64px; }
.tutorial-section:last-child{ margin-bottom:0; }
.tutorial-section-head{
  display:flex; align-items:baseline; justify-content:space-between; flex-wrap:wrap; gap:12px;
  margin-bottom:26px;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
}
.tutorial-section-head h2{ font-size:24px; margin:0; }
.tutorial-section-head p{ color:var(--ink-soft); font-size:14px; margin:4px 0 0; }

.tut-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(260px, 1fr));
  gap:22px;
}
.tut-card{
  background:var(--paper-warm);
  border:1px solid var(--line);
  border-radius:6px;
  padding:22px;
  display:flex; flex-direction:column;
  transition:transform .18s ease, box-shadow .18s ease;
}
.tut-card:hover{ transform:translateY(-3px); box-shadow:0 16px 32px rgba(46,24,84,.10); }
.tut-card .badges{ display:flex; gap:8px; margin-bottom:14px; flex-wrap:wrap; }
.tut-card h3{ font-size:16.5px; line-height:1.35; margin-bottom:8px; }
.tut-card p{ color:var(--ink-soft); font-size:13.5px; margin:0 0 14px; flex:1; }
.tut-card .meta{ font-family:var(--mono); font-size:11px; color:var(--ink-faint); }

.callout{
  background:var(--tint);
  border:1px solid var(--line);
  border-left:3px solid var(--purple);
  border-radius:4px;
  padding:20px 24px;
  margin:28px 0;
}
.callout h4{
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--purple);
  margin:0 0 10px;
}
.callout ul, .callout ol{ margin:0; padding-left:20px; }
.callout li{ color:var(--ink-soft); font-size:14.5px; margin-bottom:6px; line-height:1.6; }
.callout p{ margin:0; }

.domain-table{ width:100%; border-collapse:collapse; margin:24px 0; font-size:14px; }
.domain-table th{
  text-align:left; font-family:var(--mono); font-size:11px; text-transform:uppercase; letter-spacing:.06em;
  color:var(--ink-faint); padding:10px 14px; border-bottom:2px solid var(--line);
}
.domain-table td{ padding:12px 14px; border-bottom:1px solid var(--line); color:var(--ink-soft); }
.domain-table td:first-child{ color:var(--ink); font-weight:600; }

/* ---------- responsive ---------- */
@media (max-width:900px){
  .nav-links{ display:none; }
  .nav-links.mobile-open{
    display:flex; flex-direction:column;
    position:absolute; top:78px; left:0; right:0;
    background:var(--paper-warm);
    border-bottom:1px solid var(--line);
    padding:20px 32px 28px;
    gap:20px;
    max-height:calc(100vh - 78px);
    overflow-y:auto;
  }
  .nav-dropdown .dropdown-menu{
    position:static;
    transform:none;
    width:100%;
    grid-template-columns:1fr;
    box-shadow:none;
    border:none;
    padding:6px 0 0 0;
    margin-top:8px;
  }
  .mobile-toggle{ display:flex; }
  .hero .wrap{ grid-template-columns:1fr; padding-top:56px; padding-bottom:56px; }
  .hero-terminal{ order:-1; max-width:100%; margin-bottom:8px; }
  .terminal-canvas-wrap{ height:220px; }
  .pillars{ grid-template-columns:1fr; }
  .stats-bar .wrap{ grid-template-columns:1fr; padding:28px 32px; gap:20px; }
  .photo-gallery{ grid-template-columns:repeat(2, 1fr); }
  .stat-block{ border-left:none; padding-left:0; border-top:1px solid var(--line); padding-top:20px; }
  .stat-block:first-child{ border-top:none; padding-top:0; }
  .card-grid{ grid-template-columns:1fr; }
  .about-split{ grid-template-columns:1fr; }
  .contact-grid{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr 1fr; gap:36px 24px; }
  section{ padding:64px 0; }
  .cta-band{ padding:44px 30px; }
}
@media (prefers-reduced-motion: reduce){
  .reveal{ opacity:1; transform:none; transition:none; }
  html{ scroll-behavior:auto; }
}