/* =========================================================
   CircO2 — Design Tokens
   ========================================================= */
:root{
  --navy: #061122;
  --navy-soft: #0b1c33;
  --blue: #275489;
  --blue-light: #3f6ea8;
  --oxygen: #6fd6ff;
  --white: #ffffff;
  --soft-white: #f5f8fc;
  --light-blue: #e7f0fa;
  --gray: #aab8c8;
  --ink: #0d1b2c;
  --ink-soft: #4a5b70;

  --grad-primary: linear-gradient(135deg, var(--navy) 0%, var(--blue) 100%);
  --grad-oxygen: linear-gradient(120deg, var(--blue) 0%, var(--oxygen) 140%);

  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;

  --shadow-soft: 0 20px 60px -25px rgba(6, 17, 34, 0.35);
  --shadow-card: 0 12px 32px -18px rgba(6, 17, 34, 0.25);

  --container: 1180px;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body{
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--soft-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img{ height: auto; max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ list-style: none; margin: 0; padding: 0; }
button{ font-family: inherit; cursor: pointer; }

.container{
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4{
  font-family: var(--font-display);
  color: var(--navy);
  line-height: 1.12;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}
h1{ font-size: clamp(2.4rem, 4.6vw, 4rem); }
h2{ font-size: clamp(1.9rem, 3.2vw, 2.6rem); }
h3{ font-size: 1.3rem; }
p{ margin: 0 0 16px; color: var(--ink-soft); }

.eyebrow{
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--blue);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.eyebrow::before{
  content: "";
  width: 22px; height: 2px;
  background: var(--oxygen);
  display: inline-block;
}
.on-dark .eyebrow{ color: var(--oxygen); }
.on-dark .eyebrow::before{ background: var(--white); }

.section{ padding: 92px 0; }
.section-tight{ padding: 56px 0; }
.on-dark{ background: var(--grad-primary); color: var(--white); }
.on-dark h1, .on-dark h2, .on-dark h3, .on-dark h4{ color: var(--white); }
.on-dark p{ color: rgba(255,255,255,0.78); }
.section.on-light-alt{ background: var(--light-blue); }

.section-head{ max-width: 720px; margin: 0 0 48px; }
.section-head.center{ margin-left: auto; margin-right: auto; text-align: center; }

/* Buttons */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 32px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}
.btn-primary{
  background: var(--white);
  color: var(--navy);
  box-shadow: 0 14px 30px -12px rgba(0,0,0,0.35);
}
.btn-primary:hover{ transform: translateY(-2px); box-shadow: 0 18px 36px -14px rgba(0,0,0,0.4); }
.btn-solid{
  background: var(--grad-oxygen);
  color: var(--navy);
  box-shadow: 0 14px 30px -14px rgba(39,84,137,0.55);
}
.btn-solid:hover{ transform: translateY(-2px); }
.btn-outline{
  background: transparent;
  border-color: rgba(255,255,255,0.5);
  color: var(--white);
}
.btn-outline:hover{ border-color: var(--white); background: rgba(255,255,255,0.08); }
.btn-outline-dark{
  background: transparent;
  border-color: var(--blue);
  color: var(--blue);
}
.btn-outline-dark:hover{ background: var(--light-blue); }
.btn-block{ width: 100%; }
.btn-sm{ padding: 10px 20px; font-size: 0.85rem; }

/* Header */
.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 17, 34, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.disclosure-strip{
  background: rgba(0,0,0,0.35);
  color: rgba(255,255,255,0.65);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-align: center;
  padding: 6px 16px;
  letter-spacing: 0.01em;
}
.disclosure-strip a{ color: var(--oxygen); text-decoration: underline; }
.nav{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--container);
  margin: 0 auto;
}
.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--white);
}
.brand .mark{
  width: 34px; height: 34px;
  border-radius: 9px;
  background: var(--grad-oxygen);
  display: flex; align-items: center; justify-content: center;
  color: var(--navy);
  font-size: 0.95rem;
  font-weight: 800;
}
.nav-links{
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-links a{
  color: rgba(255,255,255,0.82);
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s ease;
}
.nav-links a:hover, .nav-links a.active{ color: var(--white); }
.nav-cta{ display: flex; align-items: center; gap: 18px; }
.nav-toggle{
  display: none;
  background: none; border: none;
  width: 40px; height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span{
  display: block; width: 22px; height: 2px; background: var(--white);
}

@media (max-width: 920px){
  .nav-links{
    position: fixed;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    background: var(--navy);
    padding: 24px;
    gap: 18px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    transform: translateY(-130%);
    transition: transform 0.3s ease;
  }
  .nav-links.open{ transform: translateY(0); }
  .nav-toggle{ display: flex; }
  .nav-cta .btn-solid{ display: none; }
  .nav-links .mobile-cta{ display: inline-flex; }
}
.nav-links .mobile-cta{ display: none; }

/* Hero */
.hero{
  position: relative;
  overflow: hidden;
  padding: 88px 0 100px;
}
.hero::before{
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 620px;
  background: radial-gradient(circle at 20% 20%, rgba(111,214,255,0.18), transparent 60%);
  pointer-events: none;
}
.hero-grid{
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-copy p.lead{
  font-size: 1.12rem;
  color: rgba(255,255,255,0.82);
  max-width: 540px;
}
.hero-actions{
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.hero-note{
  margin-top: 22px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.55);
}
.hero-visual{
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-card{
  width: 100%;
  max-width: 380px;
  background: linear-gradient(160deg, rgba(255,255,255,0.1), rgba(255,255,255,0.02));
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  backdrop-filter: blur(6px);
}
.product-mock{
  aspect-ratio: 3/4;
  border-radius: var(--radius-md);
  background: var(--grad-oxygen);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 22px;
  box-shadow: var(--shadow-soft);
}
.product-mock img{
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 18px 30px rgba(0,0,0,0.35));
}
.product-mock .box-brand{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.7rem;
  color: var(--navy);
}
.product-mock .box-tag{
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(6,17,34,0.75);
}
.product-mock svg{ position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.55; }
.product-caption{
  text-align: center;
  margin-top: 18px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}

/* Flow line divider — signature motif */
.flow-divider{ width: 100%; height: 46px; display: block; }
.flow-divider path{ fill: none; stroke: var(--oxygen); stroke-width: 2; opacity: 0.6; }

/* Trust strip */
.trust-strip{
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.12);
  border-top: 1px solid rgba(255,255,255,0.12);
}
.trust-strip div{
  background: var(--navy-soft);
  padding: 20px 14px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.85);
  text-transform: uppercase;
}
@media (max-width: 820px){
  .trust-strip{ grid-template-columns: repeat(2, 1fr); }
}

/* Pathway diagram */
.pathway{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-top: 40px;
}
.pathway-step{
  background: var(--white);
  border: 1px solid var(--light-blue);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  min-width: 168px;
  text-align: center;
  box-shadow: var(--shadow-card);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--navy);
}
.pathway-step span{
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 6px;
}
.pathway-arrow{
  color: var(--oxygen);
  font-size: 1.4rem;
  padding: 0 14px;
}
@media (max-width: 760px){
  .pathway{ flex-direction: column; }
  .pathway-arrow{ transform: rotate(90deg); padding: 6px 0; }
}

/* Card grids */
.grid{ display: grid; gap: 26px; }
.grid-2{ grid-template-columns: repeat(2, 1fr); }
.grid-3{ grid-template-columns: repeat(3, 1fr); }
.grid-4{ grid-template-columns: repeat(4, 1fr); }
.grid-5{ grid-template-columns: repeat(5, 1fr); }
@media (max-width: 980px){
  .grid-3, .grid-4, .grid-5{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px){
  .grid-2, .grid-3, .grid-4, .grid-5{ grid-template-columns: 1fr; }
}

.card{
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(39,84,137,0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.card:hover{ transform: translateY(-4px); box-shadow: 0 22px 44px -20px rgba(6,17,34,0.28); }
.card .icon{
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
  color: var(--oxygen);
}
.card .icon svg{ width: 26px; height: 26px; }
.card h3{ margin-bottom: 8px; }
.card p{ margin-bottom: 0; font-size: 0.94rem; }
.card .num{
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--blue);
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  display: block;
}

/* Benefit list style */
.benefit-card{
  display: flex; gap: 16px; align-items: flex-start;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(39,84,137,0.08);
}
.benefit-card .dot{
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--light-blue);
  color: var(--blue);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
}
.benefit-card h4{ margin: 0 0 6px; font-family: var(--font-display); font-size: 1.02rem; color: var(--navy); }
.benefit-card p{ margin: 0; font-size: 0.9rem; }

/* Ingredient cards */
.ingredient-card{
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(39,84,137,0.08);
  display: flex;
  flex-direction: column;
}
.ingredient-visual{
  height: 150px;
  background: var(--grad-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.ingredient-visual span{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.4rem;
  color: rgba(255,255,255,0.92);
  z-index: 1;
}
.ingredient-body{ padding: 24px 24px 28px; }
.ingredient-body .role{
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue);
  margin-bottom: 10px;
  display: block;
}
.ingredient-body ul{ margin-top: 14px; }
.ingredient-body li{
  font-size: 0.88rem;
  color: var(--ink-soft);
  padding-left: 20px;
  position: relative;
  margin-bottom: 8px;
}
.ingredient-body li::before{
  content: "";
  position: absolute; left: 0; top: 7px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--oxygen);
  box-shadow: 0 0 0 3px var(--light-blue);
}

/* Who / persona chips */
.chip-grid{
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}
.chip{
  background: var(--white);
  border: 1px solid var(--light-blue);
  border-radius: 999px;
  padding: 12px 22px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--navy);
  box-shadow: var(--shadow-card);
}

/* Testimonial / experience cards */
.exp-card{
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(39,84,137,0.08);
  position: relative;
}
.exp-card .quote-mark{
  font-family: var(--font-display);
  font-size: 2.6rem;
  color: var(--light-blue);
  line-height: 1;
  margin-bottom: 6px;
}
.exp-card .exp-tag{
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--blue);
  background: var(--light-blue);
  padding: 5px 12px;
  border-radius: 999px;
  margin-top: 16px;
}

/* FAQ Accordion */
.faq-list{ max-width: 820px; margin: 0 auto; }
.faq-item{
  background: var(--white);
  border: 1px solid var(--light-blue);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
}
.faq-question{
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--navy);
}
.faq-question .plus{
  font-size: 1.3rem;
  color: var(--blue);
  transition: transform 0.25s ease;
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item.open .faq-question .plus{ transform: rotate(45deg); }
.faq-answer{
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
}
.faq-item.open .faq-answer{ padding: 0 24px 22px; }
.faq-answer p{ margin: 0; font-size: 0.94rem; }

/* CTA band */
.cta-band{
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  background: var(--grad-primary);
  color: var(--white);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band h2{ color: var(--white); }
.cta-band p{ color: rgba(255,255,255,0.8); max-width: 560px; margin-left: auto; margin-right: auto; }

/* Pricing */
.pricing-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
  margin-top: 40px;
}
.price-card{
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  text-align: center;
  border: 1px solid rgba(39,84,137,0.1);
  box-shadow: var(--shadow-card);
  position: relative;
}
.price-card.featured{
  background: var(--grad-primary);
  color: var(--white);
  transform: scale(1.04);
  box-shadow: var(--shadow-soft);
  border: none;
}
.price-card.featured h3, .price-card.featured .price-tag{ color: var(--white); }
.price-card.featured p{ color: rgba(255,255,255,0.75); }
.price-badge{
  position: absolute;
  top: -14px; left: 50%;
  transform: translateX(-50%);
  background: var(--oxygen);
  color: var(--navy);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 999px;
  white-space: nowrap;
}
.price-card h3{ font-size: 1.05rem; margin-bottom: 4px; }
.price-card .qty{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--blue);
  margin-bottom: 18px;
  display: block;
}
.price-card.featured .qty{ color: var(--oxygen); }
.price-tag{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.2rem;
  color: var(--navy);
  line-height: 1;
}
.price-tag span{
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.price-card.featured .price-tag span{ color: rgba(255,255,255,0.65); }
.price-save{
  font-size: 0.82rem;
  color: #1f9d55;
  font-weight: 600;
  margin: 10px 0 4px;
}
.price-card.featured .price-save{ color: #8ff0b6; }
.price-total{
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin-bottom: 20px;
}
.price-card.featured .price-total{ color: rgba(255,255,255,0.6); }
@media (max-width: 860px){
  .pricing-grid{ grid-template-columns: 1fr; }
  .price-card.featured{ transform: none; }
}
.disclaimer-box{
  background: var(--light-blue);
  border-left: 4px solid var(--blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 22px 26px;
  font-size: 0.85rem;
  color: var(--ink-soft);
}
.disclaimer-box p{ font-size: 0.85rem; margin-bottom: 10px; }
.disclaimer-box p:last-child{ margin-bottom: 0; }

/* Footer */
.site-footer{
  background: var(--navy);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 28px;
}
.footer-grid{
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-grid h4{
  color: var(--white);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
  margin-bottom: 18px;
}
.footer-grid li{ margin-bottom: 10px; font-size: 0.9rem; }
.footer-grid a:hover{ color: var(--white); }
.footer-bottom{
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 26px;
  font-size: 0.8rem;
}
@media (max-width: 820px){
  .footer-grid{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px){
  .footer-grid{ grid-template-columns: 1fr; }
}

/* Breadcrumb */
.breadcrumb{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-bottom: 20px;
}
.breadcrumb a{ color: var(--blue); }
.breadcrumb .sep{ margin: 0 8px; color: var(--gray); }

/* Blog cards */
.blog-card{
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(39,84,137,0.08);
  display: flex;
  flex-direction: column;
}
.blog-card .thumb{
  height: 190px;
  background: var(--grad-primary);
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 16px;
  overflow: hidden;
}
.blog-card .thumb img{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
}
.blog-card .thumb .cat{ position: relative; z-index: 1; }
.blog-card .thumb .cat{
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(255,255,255,0.15);
  color: var(--white);
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.3);
}
.blog-card .body{ padding: 24px; display: flex; flex-direction: column; flex: 1; }
.blog-card .date{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}
.blog-card h3{ font-size: 1.12rem; margin-bottom: 10px; }
.blog-card p{ font-size: 0.9rem; flex: 1; }
.blog-card .read-more{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--blue);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 8px;
}

/* Article body */
.article-hero{ padding: 56px 0 0; overflow: hidden; }
.article-hero-grid{
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
  padding-bottom: 40px;
}
.article-hero-visual{
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255,255,255,0.12);
}
.article-hero-visual img{ width: 100%; height: 100%; display: block; }
@media (max-width: 860px){
  .article-hero-grid{ grid-template-columns: 1fr; }
  .article-hero-visual{ order: -1; max-width: 420px; margin: 0 auto; }
}
.article-meta{
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--oxygen);
  margin-bottom: 14px;
}
.article-body{
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px 40px;
}
.article-body h2{ margin-top: 44px; font-size: 1.7rem; }
.article-body h3{ margin-top: 30px; }
.article-body p{ font-size: 1.02rem; color: var(--ink-soft); }
.article-body ul{ margin: 0 0 20px; padding-left: 4px; }
.article-body li{
  font-size: 1.02rem;
  color: var(--ink-soft);
  padding-left: 26px;
  position: relative;
  margin-bottom: 10px;
}
.article-body li::before{
  content: "";
  position: absolute; left: 0; top: 9px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--blue);
}
.article-body a{ color: var(--blue); font-weight: 600; border-bottom: 1px solid var(--light-blue); }
.pull-note{
  background: var(--light-blue);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin: 28px 0;
  font-size: 0.95rem;
  color: var(--ink);
}
.sibling-links{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin: 40px 0;
}
.sibling-links a{
  background: var(--white);
  border: 1px solid var(--light-blue);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--navy);
  box-shadow: var(--shadow-card);
}
.sibling-links a span{
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 0.65rem;
  color: var(--blue);
  margin-bottom: 6px;
}
@media (max-width: 640px){ .sibling-links{ grid-template-columns: 1fr; } }

/* 404 */
.error-page{
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 24px;
}
.error-code{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(4rem, 12vw, 8rem);
  color: var(--white);
  line-height: 1;
  background: linear-gradient(120deg, var(--oxygen), var(--white));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Responsive helpers */
@media (max-width: 980px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero-visual{ order: -1; }
  .footer-bottom{ text-align: center; justify-content: center; }
}
@media (max-width: 640px){
  .section{ padding: 64px 0; }
  .cta-band{ padding: 42px 24px; }
}

/* === network upgrade: popup + sources === */
.np-pop {
  position: fixed; left: 18px; bottom: 18px; z-index: 60;
  display: flex; align-items: center; gap: 12px;
  width: 320px; max-width: calc(100vw - 36px);
  padding: 12px 38px 12px 12px;
  background: #fff; color: #1c1c1c;
  border: 1px solid rgba(0,0,0,0.10); border-radius: 16px;
  box-shadow: 0 18px 44px -18px rgba(0,0,0,0.45);
  font-family: inherit; text-align: left;
  transform: translateX(calc(-100% - 24px)); opacity: 0; visibility: hidden;
  transition: transform .5s cubic-bezier(.22,1,.36,1), opacity .5s ease, visibility .5s;
}
.np-pop.is-in { transform: translateX(0); opacity: 1; visibility: visible; }
.np-pop img {
  width: 52px; height: auto; flex: 0 0 52px;
  border-radius: 10px; border: 1px solid rgba(0,0,0,0.08); background: #fafafa;
}
.np-pop-body { min-width: 0; }
.np-pop-name { font-weight: 700; font-size: .9rem; line-height: 1.3; }
.np-pop-what { font-size: .82rem; opacity: .72; line-height: 1.4; }
.np-pop-when { font-size: .68rem; letter-spacing: .04em; text-transform: uppercase; opacity: .6; margin-top: 2px; }
.np-pop-close {
  position: absolute; top: 6px; right: 6px; width: 26px; height: 26px;
  border: 0; border-radius: 50%; background: transparent; color: inherit;
  opacity: .5; font-size: 1rem; line-height: 1; cursor: pointer;
}
.np-pop-close:hover { opacity: 1; background: rgba(0,0,0,0.06); }
@media (max-width: 560px) {
  /* not edge-to-edge on phones: a full-bleed card sits on top of the
     full-width CTA buttons these pages use, so leave the right side free */
  .np-pop { left: 10px; right: auto; bottom: 10px; width: min(300px, calc(100vw - 84px)); max-width: none; }
}
@media (prefers-reduced-motion: reduce) {
  .np-pop { transition: opacity .2s ease, visibility .2s; transform: none; }
}

.np-sources { padding: 56px 0; }
.np-sources .np-wrap { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.np-sources h2 { margin: 0 0 10px; }
.np-sources .np-intro { opacity: .75; max-width: 62ch; margin: 0 0 26px; }
.np-ref-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.np-ref-list li { padding-left: 16px; border-left: 3px solid rgba(0,0,0,0.12); font-size: .95rem; }
.np-ref-list a { text-decoration: underline; text-underline-offset: 3px; font-weight: 600; }
.np-ref-src { display: block; font-size: .72rem; text-transform: uppercase; letter-spacing: .04em; opacity: .6; margin-top: 2px; }

/* === network upgrade: final CTA === */
.np-final { padding: 64px 0; }
.np-final .np-wrap { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.np-final-inner {
  display: grid; grid-template-columns: minmax(0,300px) minmax(0,1fr);
  gap: 40px; align-items: center;
  background: #14100c; color: #f6efe7;
  border-radius: 24px; padding: 44px 40px;
}
.np-final-inner h2 { color: #fff; margin: 0 0 12px; }
.np-final-inner p { opacity: .82; margin: 0 0 24px; max-width: 56ch; }
.np-final-shot img {
  width: 100%; height: auto;          /* natural aspect ratio, never cropped */
  max-width: 300px; margin: 0 auto;
  filter: drop-shadow(0 18px 40px rgba(0,0,0,.5));
}
.np-final-btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 15px 34px; border-radius: 999px; font-weight: 700; font-size: 1rem;
  background: #f17e12; color: #fff; text-decoration: none;
  box-shadow: 0 12px 30px -12px rgba(241,126,18,.8);
}
.np-final-btn:hover { filter: brightness(1.07); }
.np-final-note { font-size: .78rem; letter-spacing: .04em; text-transform: uppercase; opacity: .6; margin: 18px 0 0; }
@media (max-width: 820px) {
  .np-final-inner { grid-template-columns: 1fr; text-align: center; padding: 34px 22px; }
  .np-final-inner p { margin-left: auto; margin-right: auto; }
  .np-final-shot img { max-width: 220px; }
}

/* === network upgrade: silo cross-links === */
.np-cross { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin: 32px 0; }
.np-cross a {
  display: block; padding: 16px 18px; border: 1px solid rgba(0,0,0,.12);
  border-radius: 14px; text-decoration: none; color: inherit; background: rgba(0,0,0,.015);
  transition: border-color .15s ease, transform .15s ease;
}
.np-cross a:hover { border-color: rgba(0,0,0,.35); transform: translateY(-2px); }
.np-cross span { display: block; font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; opacity: .55; margin-bottom: 5px; }
.np-cross strong { font-weight: 700; font-size: .98rem; line-height: 1.3; }
.np-crumbs { font-size: .85rem; opacity: .75; margin: 0 0 4px; }
.np-crumbs a { text-decoration: none; color: inherit; border-bottom: 1px solid rgba(0,0,0,.25); }
.np-crumbs .sep { opacity: .45; margin: 0 7px; }