/* =========================================================================
   STEM-azing — editorial design system
   Palette derived from Nella's existing editing-report branding
   (deep navy header / teal accents / gold tier marks / redline-greenline edits)
   ========================================================================= */

:root{
  --ink:        #10233d;   /* deep navy — headers, nav, dark panels */
  --ink-2:      #1b3457;   /* secondary navy for gradients/hover */
  --teal:       #1f6f78;   /* primary accent — links, underlines, icons */
  --teal-deep:  #144b52;   /* hover / pressed */
  --teal-tint:  #e4eeee;   /* pale teal chip background */
  --gold:       #c0943a;   /* signature accent — tier marks, stars */
  --gold-soft:  #f1e3c2;   /* light gold tint */
  --paper:      #f8f5ec;   /* page background — warm parchment */
  --paper-2:    #efe8d8;   /* card / section alt background */
  --paper-3:    #fbf9f3;   /* lightest card surface */
  --line:       #ddd3ba;   /* hairline rule on paper */
  --ink-text:   #1c2430;   /* body copy */
  --muted:      #5c6470;   /* secondary text */
  --muted-2:    #8a8577;   /* tertiary / caption text on paper */
  --white:      #ffffff;
  --redline:    #9c3b3b;   /* editor's-mark red, used sparingly */
  --greenline:  #3d7a5c;   /* editor's-mark green, used sparingly */
  --shadow:     0 1px 2px rgba(16,35,61,.06), 0 8px 24px -12px rgba(16,35,61,.18);
  --radius:     10px;
  --radius-sm:  6px;
  --maxw:       1120px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink-text);
  font-family:"Source Serif 4","Iowan Old Style",Georgia,serif;
  -webkit-font-smoothing:antialiased;
  line-height:1.6;
}

h1,h2,h3,h4{
  font-family:"Source Serif 4",Georgia,serif;
  color:var(--ink);
  line-height:1.15;
  margin:0 0 .5em;
  font-weight:700;
}

p{ margin:0 0 1.1em; }
a{ color:var(--teal); text-decoration:none; }
a:hover{ color:var(--teal-deep); }
a:focus-visible, button:focus-visible, .chip:focus-visible, .navlink:focus-visible{
  outline:2px solid var(--teal); outline-offset:3px; border-radius:4px;
}
img{ max-width:100%; display:block; border-radius:var(--radius-sm); }

.sans{ font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; }
.mono{ font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace; }

.wrap{ max-width:var(--maxw); margin:0 auto; padding:0 28px; }

.eyebrow{
  font-family:"IBM Plex Mono",monospace;
  text-transform:uppercase;
  letter-spacing:.14em;
  font-size:.72rem;
  color:var(--teal-deep);
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:.5em;
  margin-bottom:.9em;
}
.eyebrow::before{
  content:"";
  width:22px; height:1px; background:var(--gold);
  display:inline-block;
}

/* ---------------------------------- NAV --------------------------------- */
.site-nav{
  position:sticky; top:0; z-index:50;
  background:var(--ink);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.site-nav .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height:66px;
}
.brand{
  font-family:"Source Serif 4",Georgia,serif;
  font-weight:700; font-size:1.18rem; color:var(--white);
  letter-spacing:.01em;
  display:flex; align-items:center; gap:.5em;
}
.brand .dot{ color:var(--gold); }
.brand small{
  display:block; font-family:"IBM Plex Mono",monospace; font-weight:500;
  font-size:.6rem; letter-spacing:.12em; color:#9fb2c6; text-transform:uppercase;
}
.navlinks{ display:flex; align-items:center; gap:28px; }
.navlink{
  font-family:"Inter",sans-serif; font-size:.88rem; font-weight:500;
  color:#c9d4e2; position:relative; padding:6px 0;
}
.navlink:hover{ color:var(--white); }
.navlink.current{ color:var(--white); }
.navlink.current::after{
  content:""; position:absolute; left:0; right:0; bottom:-2px; height:2px;
  background:var(--gold); border-radius:2px;
}
.nav-cta{
  font-family:"Inter",sans-serif; font-weight:600; font-size:.85rem;
  background:var(--gold); color:var(--ink); padding:9px 18px; border-radius:100px;
  white-space:nowrap;
}
.nav-cta:hover{ background:#d4a94f; color:var(--ink); }
.nav-toggle{ display:none; background:none; border:0; color:var(--white); font-size:1.4rem; cursor:pointer; }

@media (max-width: 880px){
  .navlinks{
    position:absolute; top:66px; left:0; right:0; background:var(--ink);
    flex-direction:column; align-items:flex-start; gap:0; padding:6px 28px 18px;
    display:none; border-bottom:1px solid rgba(255,255,255,.08);
  }
  .navlinks.open{ display:flex; }
  .navlinks .navlink{ padding:12px 0; width:100%; }
  .navlinks .nav-cta{ margin-top:10px; }
  .nav-toggle{ display:block; }
}

/* --------------------------------- HERO --------------------------------- */
.hero{
  background:
    radial-gradient(1100px 480px at 85% -10%, rgba(192,148,58,.12), transparent 60%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
  color:var(--white);
  padding:76px 0 84px;
  position:relative;
  overflow:hidden;
}
.hero .eyebrow{ color:var(--gold-soft); }
.hero .eyebrow::before{ background:var(--gold); }
.hero-grid{
  display:grid; grid-template-columns:1.15fr .85fr; gap:56px; align-items:center;
}
.hero h1{
  color:var(--white); font-size:clamp(2.1rem, 4vw, 3.05rem); letter-spacing:-.01em;
}
.hero p.lede{
  font-family:"Inter",sans-serif; color:#cfd9e6; font-size:1.08rem; max-width:52ch; margin:18px 0 30px;
}
.hero-ctas{ display:flex; gap:14px; flex-wrap:wrap; }
.btn{
  font-family:"Inter",sans-serif; font-weight:600; font-size:.92rem;
  padding:13px 24px; border-radius:100px; display:inline-flex; align-items:center; gap:8px;
  border:1px solid transparent; cursor:pointer;
}
.btn-primary{ background:var(--gold); color:var(--ink); }
.btn-primary:hover{ background:#d4a94f; color:var(--ink); }
.btn-ghost{ background:transparent; color:var(--white); border-color:rgba(255,255,255,.35); }
.btn-ghost:hover{ border-color:var(--white); color:var(--white); }
.btn-dark{ background:var(--ink); color:var(--white); }
.btn-dark:hover{ background:var(--ink-2); color:var(--white); }

/* Signature element: the "redline" manuscript proof card */
.proof-card{
  background:var(--paper-3); color:var(--ink-text); border-radius:14px;
  box-shadow:0 20px 60px -20px rgba(0,0,0,.45);
  padding:26px 26px 22px; transform:rotate(1.4deg);
  border:1px solid rgba(0,0,0,.04);
}
.proof-card .proof-head{
  display:flex; align-items:center; justify-content:space-between;
  font-family:"IBM Plex Mono",monospace; font-size:.65rem; letter-spacing:.1em;
  text-transform:uppercase; color:var(--muted-2); margin-bottom:14px;
  padding-bottom:12px; border-bottom:1px dashed var(--line);
}
.proof-card .proof-head .star{ color:var(--gold); }
.proof-line{ font-family:"Source Serif 4",Georgia,serif; font-size:1.02rem; line-height:1.55; margin:0 0 14px; }
.proof-before del{ color:var(--redline); text-decoration:line-through; text-decoration-thickness:1.5px; }
.proof-before mark{ background:transparent; color:var(--redline); font-style:italic; }
.proof-after{ color:var(--ink); font-weight:600; }
.proof-after .fixed{ background:linear-gradient(transparent 62%, rgba(61,122,92,.22) 0); color:var(--greenline); font-weight:700; }
.proof-tag{
  display:inline-flex; align-items:center; gap:6px; margin-top:6px;
  font-family:"IBM Plex Mono",monospace; font-size:.62rem; letter-spacing:.1em; text-transform:uppercase;
  color:var(--teal-deep); background:var(--teal-tint); padding:4px 10px; border-radius:100px;
}

@media (max-width: 880px){
  .hero-grid{ grid-template-columns:1fr; }
  .proof-card{ transform:none; max-width:440px; }
}

/* -------------------------------- SECTIONS ------------------------------- */
section{ padding:74px 0; }
.section-head{ max-width:640px; margin-bottom:44px; }
.section-head h2{ font-size:clamp(1.6rem,2.6vw,2.1rem); }
.section-head p{ font-family:"Inter",sans-serif; color:var(--muted); font-size:1.02rem; }
.alt{ background:var(--paper-2); }
.divider{ height:1px; background:var(--line); border:0; margin:0; }

/* ------------------------------- SERVICES -------------------------------- */
.services-grid{ display:grid; grid-template-columns:1fr 1fr; gap:28px; }
@media (max-width: 880px){ .services-grid{ grid-template-columns:1fr; } }

.svc-card{
  background:var(--paper-3); border:1px solid var(--line); border-radius:var(--radius);
  padding:32px 30px; box-shadow:var(--shadow);
}
.svc-card h3{ font-size:1.45rem; margin-bottom:6px; }
.svc-card .svc-kicker{ font-family:"IBM Plex Mono",monospace; font-size:.7rem; letter-spacing:.12em; text-transform:uppercase; color:var(--teal-deep); margin-bottom:10px; display:block; }
.svc-card > p{ font-family:"Inter",sans-serif; color:var(--muted); font-size:.98rem; }

.audience-list{ list-style:none; margin:20px 0 22px; padding:0; display:flex; flex-direction:column; gap:14px; }
.audience-list li{
  display:flex; gap:14px; align-items:flex-start;
  font-family:"Inter",sans-serif; font-size:.93rem; color:var(--ink-text);
  padding-bottom:14px; border-bottom:1px solid var(--line);
}
.audience-list li:last-child{ border-bottom:0; padding-bottom:0; }
.audience-list .tick{
  flex:none; width:26px; height:26px; border-radius:50%; background:var(--teal-tint);
  color:var(--teal-deep); display:flex; align-items:center; justify-content:center;
  font-family:"IBM Plex Mono",monospace; font-size:.7rem; font-weight:700; margin-top:1px;
}
.audience-list strong{ display:block; color:var(--ink); margin-bottom:2px; font-family:"Inter",sans-serif; }
.audience-list span.desc{ color:var(--muted); }

.tier{
  border:1px solid var(--line); border-radius:var(--radius-sm); padding:18px 18px 16px;
  margin-bottom:14px; background:var(--paper);
}
.tier:last-of-type{ margin-bottom:22px; }
.tier-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:8px; gap:10px; flex-wrap:wrap; }
.tier-name{ font-family:"Inter",sans-serif; font-weight:700; color:var(--ink); font-size:1rem; display:flex; align-items:center; gap:8px; }
.tier-name .star{ color:var(--gold); }
.tier-price{ font-family:"IBM Plex Mono",monospace; font-size:.82rem; color:var(--teal-deep); font-weight:600; white-space:nowrap; }
.tier ul{ margin:8px 0 0; padding-left:19px; font-family:"Inter",sans-serif; font-size:.88rem; color:var(--muted); }
.tier li{ margin-bottom:5px; }
.tier .sample-link{ display:inline-flex; align-items:center; gap:6px; margin-top:10px; font-family:"Inter",sans-serif; font-weight:600; font-size:.85rem; }

.svc-foot{ display:flex; gap:12px; flex-wrap:wrap; margin-top:6px; }

/* --------------------------------- CHIPS --------------------------------- */
.filter-bar{ display:flex; gap:10px; flex-wrap:wrap; margin-bottom:34px; }
.chip{
  font-family:"IBM Plex Mono",monospace; font-size:.72rem; letter-spacing:.05em;
  text-transform:uppercase; padding:8px 16px; border-radius:100px;
  background:var(--paper-3); border:1px solid var(--line); color:var(--muted);
  cursor:pointer; transition:background .15s,color .15s,border-color .15s;
}
.chip:hover{ border-color:var(--teal); color:var(--teal-deep); }
.chip.active{ background:var(--ink); border-color:var(--ink); color:var(--white); }

/* --------------------------------- CARDS --------------------------------- */
.card-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
@media (max-width: 980px){ .card-grid{ grid-template-columns:repeat(2,1fr); } }
@media (max-width: 660px){ .card-grid{ grid-template-columns:1fr; } }

.post-card{
  background:var(--paper-3); border:1px solid var(--line); border-radius:var(--radius);
  padding:24px 22px; display:flex; flex-direction:column; height:100%;
  box-shadow:var(--shadow); transition:transform .18s ease, box-shadow .18s ease;
}
.post-card:hover{ transform:translateY(-3px); box-shadow:0 24px 50px -18px rgba(16,35,61,.28); }
.post-meta{
  display:flex; align-items:center; gap:10px; font-family:"IBM Plex Mono",monospace;
  font-size:.68rem; letter-spacing:.06em; text-transform:uppercase; color:var(--teal-deep);
  margin-bottom:12px;
}
.post-meta .cat{ background:var(--teal-tint); padding:3px 9px; border-radius:100px; }
.post-meta .date{ color:var(--muted-2); }
.post-card h3{ font-size:1.16rem; margin-bottom:8px; }
.post-card h3 a{ color:var(--ink); }
.post-card h3 a:hover{ color:var(--teal-deep); }
.post-card p{ font-family:"Inter",sans-serif; font-size:.9rem; color:var(--muted); flex-grow:1; margin-bottom:14px; }
.post-card .read-more{ font-family:"Inter",sans-serif; font-weight:600; font-size:.85rem; }
.post-card.dim{ opacity:.7; }
.post-card .badge-soon{
  font-family:"IBM Plex Mono",monospace; font-size:.62rem; text-transform:uppercase; letter-spacing:.08em;
  color:var(--muted-2); border:1px dashed var(--line); padding:3px 8px; border-radius:100px; margin-left:auto;
}

.sample-badge{
  position:absolute; top:14px; right:14px; background:var(--gold); color:var(--ink);
  font-family:"IBM Plex Mono",monospace; font-size:.6rem; letter-spacing:.08em; text-transform:uppercase;
  padding:4px 9px; border-radius:100px; font-weight:700;
}
.post-card{ position:relative; }

/* -------------------------------- PUBLICATIONS --------------------------------- */
.pub-strip{
  display:grid; grid-template-columns:1.4fr .9fr; gap:40px; align-items:center;
  background:var(--ink); color:var(--white); border-radius:16px; padding:44px 44px;
}
.pub-strip h2{ color:var(--white); font-size:1.7rem; }
.pub-strip p{ font-family:"Inter",sans-serif; color:#c9d4e2; font-size:.98rem; }
.pub-stats{ display:flex; gap:28px; flex-wrap:wrap; }
.pub-stat{ font-family:"IBM Plex Mono",monospace; }
.pub-stat .n{ font-size:1.5rem; color:var(--gold); font-weight:700; display:block; }
.pub-stat .l{ font-size:.68rem; letter-spacing:.08em; text-transform:uppercase; color:#9fb2c6; }
.pub-cta{ display:flex; flex-direction:column; gap:12px; align-items:flex-start; }
@media (max-width: 880px){ .pub-strip{ grid-template-columns:1fr; padding:32px 26px; } }

/* --------------------------------- FOOTER --------------------------------- */
footer{ background:var(--ink); color:#c9d4e2; padding:56px 0 32px; }
.footer-grid{ display:grid; grid-template-columns:1.3fr 1fr 1fr; gap:40px; margin-bottom:38px; }
@media (max-width: 780px){ .footer-grid{ grid-template-columns:1fr; gap:28px; } }
footer h4{ color:var(--white); font-family:"Inter",sans-serif; font-size:.78rem; letter-spacing:.1em; text-transform:uppercase; margin-bottom:14px; }
footer .brand{ margin-bottom:10px; }
footer p{ font-family:"Inter",sans-serif; font-size:.92rem; color:#a9b7c8; max-width:36ch; }
.footer-links{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:10px; }
.footer-links a{ color:#c9d4e2; font-family:"Inter",sans-serif; font-size:.92rem; }
.footer-links a:hover{ color:var(--white); }
.footer-bottom{ border-top:1px solid rgba(255,255,255,.1); padding-top:22px; display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; font-family:"Inter",sans-serif; font-size:.8rem; color:#8296ab; }

/* ------------------------------- ARTICLE PAGE ----------------------------- */
.article-hero{ background:var(--ink); color:var(--white); padding:52px 0 40px; }
.article-hero .wrap{ max-width:760px; }
.article-hero h1{ color:var(--white); font-size:clamp(1.7rem,3.4vw,2.5rem); }
.article-byline{ font-family:"Inter",sans-serif; color:#c9d4e2; font-size:.92rem; margin-top:14px; }
.article-dek{ font-family:"Inter",sans-serif; color:#cfd9e6; font-size:1.08rem; margin-top:14px; }
.back-link{ font-family:"Inter",sans-serif; font-size:.85rem; color:#9fb2c6; }
.back-link:hover{ color:var(--white); }

article.post-body{ max-width:720px; margin:0 auto; padding:56px 28px 30px; }
article.post-body h2{ font-size:1.5rem; margin-top:1.7em; }
article.post-body h3{ font-size:1.18rem; margin-top:1.4em; color:var(--teal-deep); }
article.post-body p{ font-size:1.08rem; }
article.post-body ul, article.post-body ol{ font-size:1.05rem; padding-left:1.3em; margin-bottom:1.2em; }
article.post-body li{ margin-bottom:.5em; }
article.post-body blockquote{
  border-left:3px solid var(--gold); margin:1.6em 0; padding:.2em 0 .2em 1.2em;
  font-style:italic; color:var(--muted);
}
article.post-body em{ color:var(--ink); }
article.post-body strong{ color:var(--ink); }
article.post-body img{ margin:1.6em 0; }
.post-footer-nav{ max-width:720px; margin:20px auto 70px; padding:26px 28px 0; border-top:1px solid var(--line); display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap; font-family:"Inter",sans-serif; }
.post-footer-nav a{ font-weight:600; }

.cta-strip{ background:var(--paper-2); padding:52px 0; text-align:center; }
.cta-strip h3{ font-size:1.4rem; }
.cta-strip p{ font-family:"Inter",sans-serif; color:var(--muted); max-width:52ch; margin:0 auto 22px; }

/* --------------------------------- MISC --------------------------------- */
/* Progressive enhancement: elements are fully visible by default. JS adds
   .reveal-init (only once it can also guarantee the reveal-to-visible step),
   so content never depends on JavaScript to become visible. */
.reveal-init{ opacity:0; transform:translateY(14px); transition:opacity .5s ease, transform .5s ease; }
.reveal-init.in{ opacity:1; transform:none; }