/* ================================================================
   DECISION SPACE PUBLICATIONS: design system
   Tokens pulled from README + existing brand assets (sting, equation
   widget). Fraunces for editorial/equation voice, Oswald for the
   tactical condensed headline register, Source Serif for long-form.
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,500;0,9..144,600;1,9..144,400;1,9..144,500&family=Oswald:wght@400;500;600;700&family=Source+Serif+4:ital,wght@0,400;0,600;1,400&display=swap');

:root{
  --red:      #981412;
  --redhot:   #E8332A;
  --cream:    #F4EFE6;
  --ink:      #1A1612;
  --black:    #000000;
  --charcoal: #0E0D0C;
  --panel:    #15120D;
  --line:     rgba(122,58,46,.4);
  --muted:    #A9A397;
  --body:     #DAD4C8;

  --serif: 'Fraunces', 'Source Serif 4', Georgia, serif;
  --read:  'Source Serif 4', Georgia, serif;
  --head:  'Oswald', 'Arial Narrow', sans-serif;

  --wrap: 1180px;
  --col:  640px;
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background:var(--black);
  color:var(--body);
  font-family:var(--read);
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
.container{ max-width:var(--wrap); margin:0 auto; padding:0 28px; }
.col{ max-width:var(--col); }

h1,h2,h3,h4{
  font-family:var(--head);
  color:var(--cream);
  font-weight:600;
  letter-spacing:.01em;
  line-height:1.12;
  margin:0 0 .5em;
}
h1{ font-size:clamp(2.4rem,6vw,4.6rem); letter-spacing:.005em; }
h2{ font-size:clamp(1.7rem,3.6vw,2.6rem); }
h3{ font-size:1.25rem; }
p{ margin:0 0 1.1em; }
strong{ color:var(--cream); font-weight:600; }
.serif-em{ font-family:var(--serif); font-style:italic; color:var(--redhot); }

.eyebrow{
  font-family:var(--head);
  font-size:.78rem;
  letter-spacing:.22em;
  color:var(--redhot);
  text-transform:uppercase;
  margin:0 0 .9em;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  font-family:var(--head);
  font-size:.92rem;
  letter-spacing:.06em;
  padding:.9em 1.6em;
  border-radius:3px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .15s ease, background .2s ease, border-color .2s ease, color .2s ease;
}
.btn:active{ transform:translateY(1px); }
.btn-primary{ background:var(--red); color:#fff; }
.btn-primary:hover{ background:var(--redhot); }
.btn-ghost{ border-color:var(--line); color:var(--cream); }
.btn-ghost:hover{ border-color:var(--redhot); color:#fff; }
.btn-block{ width:100%; justify-content:center; }
.btn:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible, button:focus-visible{
  outline:2px solid var(--redhot); outline-offset:3px;
}

/* ---------- nav ---------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(0,0,0,.9);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  gap:20px; padding:14px 28px;
}
.nav-brand{ display:flex; align-items:center; gap:.6em; flex:none; }
.nav-brand img{ height:48px; width:auto; max-width:none; }
.nav-brand span{
  font-family:var(--head); font-weight:600; font-size:.92rem;
  letter-spacing:.14em; color:var(--cream);
}
.nav-links{
  display:flex; align-items:center; gap:clamp(.9em,1.7vw,2.1em);
  list-style:none; margin:0; padding:0;
}
.nav-links a{
  font-family:var(--head); font-size:.85rem; letter-spacing:.05em;
  color:var(--body); padding:.3em 0; border-bottom:1px solid transparent; white-space:nowrap;
}
.nav-links a:hover, .nav-links a.active{ color:var(--cream); border-color:var(--redhot); }
.nav-cta{ display:flex; align-items:center; gap:1em; flex:none; }
.nav-toggle{
  display:none; background:none; border:0; color:var(--cream);
  font-size:1.6rem; cursor:pointer; line-height:1;
  width:44px; height:44px; align-items:center; justify-content:center;
}
@media (max-width:1100px){
  .nav-links{
    position:absolute; top:100%; left:0; right:0;
    background:var(--black); border-bottom:1px solid var(--line);
    flex-direction:column; align-items:stretch; gap:0;
    padding:6px 28px 18px;
    max-height:calc(100vh - 76px); max-height:calc(100dvh - 76px); overflow-y:auto;
    visibility:hidden; opacity:0; transform:translateY(-8px);
    transition:opacity .2s ease, transform .2s ease, visibility .2s ease;
  }
  .nav-links.open{ visibility:visible; opacity:1; transform:none; }
  .nav-links li{ width:100%; border-bottom:1px solid var(--line); }
  .nav-links li:last-child{ border-bottom:0; }
  .nav-links a{ display:block; padding:1em 0; font-size:.95rem; white-space:normal; border-bottom:0; }
  .nav-links a.active{ color:var(--redhot); }
  .nav-toggle{ display:flex; }
}
@media (max-width:640px){
  .nav{ gap:12px; padding:10px 20px; }
  .nav-brand img{ height:40px; }
  .nav-cta .btn-ghost{ padding:.55em .9em; font-size:.76rem; }
}
@media (max-width:420px){
  .nav-brand img{ height:38px; }
  .nav-cta .btn-ghost{ display:none; }
}
@media (max-width:340px){
  .nav-brand img{ height:34px; }
}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  padding:56px 0 32px;
  margin-top:96px;
}
.footer-grid{
  display:grid; grid-template-columns:1.3fr 1fr 1fr 1fr; gap:32px;
  margin-bottom:40px;
}
.footer-grid h4{ font-size:.8rem; letter-spacing:.14em; color:var(--muted); text-transform:uppercase; margin-bottom:1em;}
.footer-grid ul{ list-style:none; margin:0; padding:0; }
.footer-grid li{ margin-bottom:.6em; }
.footer-grid a:hover{ color:var(--redhot); }
.footer-brand img{ height:46px; width:auto; margin-bottom:1em; }
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center;
  padding-top:24px; border-top:1px solid var(--line);
  font-size:.82rem; color:var(--muted); flex-wrap:wrap; gap:12px;
}
@media (max-width:760px){
  .footer-grid{ grid-template-columns:1fr 1fr; }
}

/* ---------- sections / layout ---------- */
section{ padding:96px 0; }
.section-tight{ padding:64px 0; }
.hr{ border:0; border-top:1px solid var(--line); margin:0; }
.grid-2{ display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center; }
@media (max-width:860px){ .grid-2{ grid-template-columns:1fr; gap:40px; } }
.tag-row{ display:flex; flex-wrap:wrap; gap:.6em 1.4em; }
.tag{ font-family:var(--head); font-size:.78rem; letter-spacing:.08em; color:var(--muted); }

/* ---------- hero ---------- */
.hero{
  position:relative; overflow:hidden;
  padding:120px 0 100px;
  background:
    radial-gradient(120% 90% at 50% 8%, rgba(152,20,18,.22) 0%, rgba(0,0,0,0) 55%),
    var(--black);
  text-align:center;
  border-bottom:1px solid var(--line);
}
.hero-eq{
  max-width:560px; margin:0 auto 2.2em;
  filter:drop-shadow(0 0 26px rgba(232,51,42,.28));
}
.hero h1{ max-width:820px; margin-left:auto; margin-right:auto; }
.hero .lede{ max-width:600px; margin:0 auto 2.4em; font-size:1.15rem; color:var(--body); }
.hero-actions{ display:flex; gap:1em; justify-content:center; flex-wrap:wrap; }
.hero-note{ margin-top:1.6em; font-family:var(--head); font-size:.76rem; letter-spacing:.1em; color:var(--muted); }

/* ---------- cards ---------- */
.card{
  background:var(--panel); border:1px solid var(--line); border-radius:10px;
  padding:28px;
}
.press-row{
  display:flex; flex-wrap:wrap; gap:2.6em 3em; align-items:center; justify-content:center;
  padding:36px 0; opacity:.85;
}
.press-row span{ font-family:var(--head); letter-spacing:.1em; font-size:.95rem; color:var(--cream); }

.post-card{ border-top:1px solid var(--line); padding:32px 0; display:flex; gap:28px; }
.post-card:last-child{ border-bottom:1px solid var(--line); }
.post-card .meta{ font-family:var(--head); font-size:.75rem; letter-spacing:.1em; color:var(--redhot); margin-bottom:.6em; }
.post-card h3{ margin-bottom:.4em; }
.post-card .excerpt{ color:var(--body); margin-bottom:.6em; }
.post-card .readmore{ font-family:var(--head); font-size:.8rem; letter-spacing:.06em; color:var(--cream); border-bottom:1px solid var(--redhot); padding-bottom:2px; }
@media (max-width:600px){ .post-card{ flex-direction:column; } }

/* ---------- forms ---------- */
.field{ margin-bottom:1.1em; text-align:left; }
.field label{
  display:block; font-family:var(--head); font-size:.72rem; letter-spacing:.1em;
  color:var(--muted); text-transform:uppercase; margin-bottom:.5em;
}
.field input, .field textarea, .field select{
  width:100%; background:var(--charcoal); border:1px solid var(--line);
  color:var(--cream); font-family:var(--read); font-size:1rem;
  padding:.85em 1em; border-radius:4px;
}
.field textarea{ min-height:120px; resize:vertical; }
.field input::placeholder, .field textarea::placeholder{ color:#857F73; }
.form-note{ font-size:.82rem; color:var(--muted); margin-top:1em; }
.form-success{
  display:none; background:var(--panel); border:1px solid var(--redhot);
  border-radius:8px; padding:20px 22px; margin-top:1.2em;
}
.form-success.show{ display:block; }
.form-success .stat{ color:var(--cream); }
.error-text{ color:var(--redhot); font-size:.82rem; margin-top:.4em; display:none; }
.field.invalid input, .field.invalid textarea{ border-color:var(--redhot); }
.field.invalid .error-text{ display:block; }

/* ---------- misc ---------- */
.center{ text-align:center; }
.kicker-block{ max-width:720px; }
.pull{
  font-family:var(--serif); font-style:italic; color:var(--cream);
  font-size:1.5rem; line-height:1.45; border-left:2px solid var(--red);
  padding-left:1.2em; margin:1.6em 0;
}
.credentials{ list-style:none; margin:0; padding:0; }
.credentials li{
  padding:16px 0; border-top:1px solid var(--line); display:flex; gap:16px;
}
.credentials li span.mark{ color:var(--redhot); font-family:var(--serif); font-style:italic; }
.faq-item{ border-top:1px solid var(--line); padding:22px 0; }
.faq-item:last-child{ border-bottom:1px solid var(--line); }
.faq-q{
  display:flex; justify-content:space-between; align-items:center; gap:16px;
  cursor:pointer; font-family:var(--head); color:var(--cream); font-size:1.02rem;
}
.faq-q .ic{ color:var(--redhot); font-size:1.3rem; transition:transform .2s ease; flex:none; }
.faq-item.open .faq-q .ic{ transform:rotate(45deg); }
.faq-a{ max-height:0; overflow:hidden; transition:max-height .25s ease; }
.faq-item.open .faq-a{ max-height:400px; }
.faq-a p{ padding-top:14px; margin-bottom:0; }

.pill{
  display:inline-block; font-family:var(--head); font-size:.7rem; letter-spacing:.1em;
  color:var(--redhot); border:1px solid var(--line); border-radius:20px; padding:.35em 1em;
  margin-bottom:1.4em;
}

.divider-eq{ text-align:center; font-family:var(--serif); font-style:italic; color:var(--line); font-size:2rem; margin:0 0 1em; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration:.001ms !important; transition-duration:.001ms !important; }
}

/* ---------- sticky mobile CTA ---------- */
.sticky-cta{
  position:fixed; left:0; right:0; bottom:0; z-index:60;
  background:var(--black); border-top:1px solid var(--line);
  padding:12px 18px; align-items:center; justify-content:space-between; gap:12px;
  transform:translateY(120%); transition:transform .3s ease;
  box-shadow:0 -8px 24px rgba(0,0,0,.4);
  display:none;
}
.sticky-cta.visible{ transform:translateY(0); }
.sticky-cta-text{ font-family:var(--head); font-size:.78rem; color:var(--cream); letter-spacing:.02em; line-height:1.3; }
.sticky-cta-actions{ display:flex; align-items:center; gap:8px; flex:none; }
.sticky-cta .btn{ padding:.6em 1em; font-size:.76rem; white-space:nowrap; }
.sticky-cta-close{ background:none; border:0; color:var(--muted); font-size:1.3rem; line-height:1; cursor:pointer; padding:2px 4px; }
@media (max-width:900px){ .sticky-cta{ display:flex; } }


/* ---------- social links ---------- */
.social-row{ display:flex; flex-wrap:wrap; gap:.4em 1.1em; margin-top:1.1em; }
.social-row a{
  font-family:var(--head); font-size:.76rem; letter-spacing:.06em;
  color:var(--muted); border-bottom:1px solid transparent; padding:.5em 0;
}
.social-row a:hover{ color:var(--redhot); border-color:var(--redhot); }

/* ---------- reusable video placeholder block ---------- */
.video-block-section{ max-width:640px; margin:0 auto; text-align:center; }
.video-block{
  position:relative; aspect-ratio:16/9; border-radius:12px; overflow:hidden;
  background:radial-gradient(120% 140% at 30% 20%, rgba(232,51,42,.28) 0%, rgba(0,0,0,0) 55%), linear-gradient(160deg, #1c110d, #050403);
  border:1px solid var(--line); cursor:pointer; display:flex; align-items:center; justify-content:center;
}
.video-block .play-btn{
  width:64px; height:64px; border-radius:50%; background:var(--red);
  display:flex; align-items:center; justify-content:center; transition:background .15s ease, transform .15s ease;
}
.video-block:hover .play-btn{ background:var(--redhot); transform:scale(1.05); }
.video-block .play-btn svg{ width:22px; height:22px; margin-left:3px; }
.video-block .cap{
  position:absolute; left:0; right:0; bottom:16px; text-align:center;
  font-family:var(--head); font-size:.76rem; letter-spacing:.06em; color:var(--cream);
}
.video-block .cap span{ display:block; color:var(--muted); font-size:.74rem; letter-spacing:.1em; margin-top:.3em; text-transform:uppercase; }
.video-block.playing .play-btn, .video-block.playing .cap{ display:none; }
.video-block .video-note{
  display:none; position:absolute; inset:0; align-items:center; justify-content:center;
  flex-direction:column; gap:8px; text-align:center; padding:20px;
}
.video-block.playing .video-note{ display:flex; }
.video-block .video-note p{ margin:0; font-family:var(--head); font-size:.85rem; color:var(--cream); }
.video-block .video-note span{ font-family:var(--head); font-size:.68rem; letter-spacing:.08em; color:var(--muted); text-transform:uppercase; }

/* ================================================================
   RESPONSIVE REFINEMENTS (all screen sizes)
   ================================================================ */
html{ -webkit-text-size-adjust:100%; text-size-adjust:100%; }
body{ overflow-x:clip; overflow-wrap:break-word; }
img, svg, video{ max-width:100%; }
.footer-bottom span, .credentials li > span:last-child, .social-row a{ overflow-wrap:anywhere; }
.btn{ max-width:100%; text-align:center; justify-content:center; }

/* large and ultra-wide screens: scale type and widen the content area */
@media (min-width:1600px){
  body{ font-size:18.5px; }
  :root{ --wrap:1320px; --col:700px; }
}
@media (min-width:2200px){
  body{ font-size:21px; }
  :root{ --wrap:1560px; --col:780px; }
  .site-footer{ margin-top:120px; }
}

/* tablets and below */
@media (max-width:900px){
  section{ padding:72px 0; }
  .section-tight{ padding:52px 0; }
  .hero{ padding:80px 0 70px; }
  .site-footer{ margin-top:72px; padding-bottom:96px; } /* room for the sticky CTA bar */
  .footer-brand{ grid-column:1 / -1; }
}

/* phones */
@media (max-width:640px){
  body{ font-size:16.5px; }
  .container{ padding:0 20px; }
  section{ padding:56px 0; }
  .section-tight{ padding:40px 0; }
  .hero{ padding:56px 0 56px; }
  .hero .lede{ font-size:1.05rem; }
  .hero-actions, .m-btns{ flex-direction:column; align-items:stretch; }
  .hero-actions .btn{ width:100%; }
  .press-row{ gap:1.2em 1.8em; padding:26px 0; }
  .press-row span{ font-size:.85rem; }
  .card{ padding:22px 20px; }
  .pull{ font-size:1.2rem; padding-left:1em; }
  .footer-grid{ gap:28px 20px; }
  .footer-bottom{ flex-direction:column; align-items:flex-start; }
  .grid-2{ gap:32px; }
  .nav-links{ padding:6px 20px 18px; }
}
@media (max-width:340px){
  .footer-grid{ grid-template-columns:1fr; }
}
@media (max-width:380px){
  h1{ font-size:2.15rem; }
}

/* touch devices: comfortable tap targets */
@media (pointer:coarse){
  .footer-grid li{ margin-bottom:.1em; }
  .footer-grid a{ display:inline-block; padding:.55em 0; }
  .social-row{ gap:.2em 1.4em; }
  .social-row a{ display:inline-block; padding:.7em 0; }
  .faq-q{ padding:.3em 0; min-height:44px; }
  .btn{ min-height:44px; }
}

/* landscape phones: don't let the sticky nav eat the screen */
@media (max-height:480px) and (orientation:landscape){
  .site-header{ position:static; }
  .hero{ padding:40px 0; }
}

/* tap-friendly inline helper links */
.post-card .readmore{ display:inline-block; padding:.55em 0 .25em; }
.tag-row{ gap:.2em 1.4em; }
.tag-row a.tag{ display:inline-block; padding:.55em 0; }

/* stacked two-column sections: keep tall posters and covers a sensible size */
@media (max-width:860px){
  .grid-2 > img, .grid-2 > .card, .grid-2 > .eq-figure-trigger{
    max-width:520px; width:100%; margin-left:auto; margin-right:auto;
  }
}