/* ============================================================
   Ocean Motion Analytics — Editorial Atlas
   Prototype design system. Mirrors design.md (to be written).
   ============================================================ */

:root {
  /* ------ Colour ------ */
  --color-abyss:    #050f1c;   /* deepest hero background */
  --color-navy:     #091c33;
  --color-navy-mid: #13294a;
  --color-cyan:     #4fc3d7;
  --color-cyan-lt:  #a8e0ea;
  --color-accent:   #ff6a2b;   /* the single accent — physics cold, ML warm */
  --color-accent-lt:#ff8a4a;

  --color-paper:    #f4efe3;   /* warm editorial paper */
  --color-paper-2:  #efe9d9;
  --color-ink:      #0b1420;
  --color-ink-2:    #4a5665;
  --color-ink-3:    #8a94a2;
  --color-rule:     #d6cdb6;

  /* ------ Type ------ */
  --font-display: "Instrument Serif", ui-serif, Georgia, serif;
  --font-body:    "IBM Plex Sans", system-ui, sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, monospace;

  /* ------ Spacing (8pt, editorially generous) ------ */
  --s-1: 0.5rem;   --s-2: 1rem;
  --s-3: 1.5rem;   --s-4: 2rem;
  --s-5: 3rem;     --s-6: 4.5rem;
  --s-7: 6.5rem;   --s-8: 9rem;

  /* ------ Layout ------ */
  --container:     1320px;
  --pad:           clamp(1.25rem, 4vw, 3rem);

  /* ------ Motion ------ */
  --ease-expo:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-quart: cubic-bezier(0.25, 1, 0.5, 1);
}

/* ============================================================
   Reset
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern", "liga", "calt", "ss01";
}
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; }
ul, ol { list-style: none; padding: 0; margin: 0; }
h1, h2, h3, h4, h5, p { margin: 0; }
button, input, select { font: inherit; }

/* ============================================================
   Typography primitives
   ============================================================ */

.display, h1, h2, h3, h4, .hero__headline, .section-title {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.018em;
  line-height: 1.05;
  color: var(--color-ink);
}
.section-title em,
.hero__headline em {
  font-style: italic;
  color: var(--color-accent);
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-2);
  display: inline-flex;
  align-items: center;
  gap: 0.875rem;
}
.section-eyebrow::before {
  content: "";
  display: inline-block;
  width: 32px;
  height: 1px;
  background: currentColor;
}
.section-title {
  font-size: clamp(2rem, 4.6vw, 3.75rem);
  margin-top: var(--s-2);
  max-width: 22ch;
}

/* ============================================================
   Header
   ============================================================ */

.site-header {
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--s-3) var(--pad);
  color: var(--color-paper);
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 450;

  letter-spacing: -0.015em;
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 0.625rem;
  line-height: 1;
}
.wordmark__name {
  background: linear-gradient(90deg, var(--color-paper), var(--color-cyan-lt));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.wordmark__suffix {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--color-cyan-lt);
  transform: translateY(-0.1em);
}

.site-nav ul {
  display: flex;
  gap: var(--s-4);
  font-size: 0.875rem;
  align-items: center;
}
.site-nav a {
  text-decoration: none;
  color: rgba(244, 239, 227, 0.78);
  transition: color 0.25s var(--ease-quart);
  position: relative;
}
.site-nav a:hover { color: var(--color-paper); }
.site-nav a:not(.site-nav__cta)::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s var(--ease-expo);
}
.site-nav a:not(.site-nav__cta):hover::after {
  transform: scaleX(1);
  transform-origin: left;
}
.site-nav__cta {
  border: 1px solid rgba(244, 239, 227, 0.35);
  padding: 0.5rem 1rem;
  color: var(--color-paper) !important;
}
.site-nav__cta:hover {
  background: var(--color-paper);
  color: var(--color-abyss) !important;
}

/* Hamburger toggle — hidden until the mobile breakpoint */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-paper);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  margin: 0 auto;
  background: currentColor;
  transition: transform 0.3s var(--ease-quart), opacity 0.2s var(--ease-quart);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
.site-header--light .nav-toggle { color: var(--color-ink); }

/* ============================================================
   Hero
   ============================================================ */

.hero {
  position: relative;
  min-height: 100vh;
  background: var(--color-abyss);
  color: var(--color-paper);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: clamp(7rem, 14vh, 10rem) var(--pad) var(--s-6);
  isolation: isolate;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.95;
}

.hero__grid {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(168, 224, 234, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 224, 234, 0.045) 1px, transparent 1px);
  background-size: 96px 96px;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 50%, black 30%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 50%, black 30%, transparent 90%);
  pointer-events: none;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(180deg,
    rgba(5, 15, 28, 0.55) 0%,
    rgba(5, 15, 28, 0.15) 18%,
    rgba(5, 15, 28, 0.10) 48%,
    rgba(5, 15, 28, 0.70) 82%,
    rgba(5, 15, 28, 0.95) 100%);
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 3;
  max-width: 1000px;
  width: 100%;
}

.hero__headline {
  font-size: clamp(2.4rem, 6.4vw, 5.75rem);
  font-weight: 300;
  line-height: 1.02;
  letter-spacing: -0.028em;

  max-width: 17ch;
  color: var(--color-paper);
  opacity: 0;
  transform: translateY(30px);
  animation: rise 1.3s var(--ease-expo) 0.45s forwards;
}
.hero__headline em {
  font-style: italic;
  font-weight: 350;

  color: var(--color-accent);
  position: relative;
}
.hero__headline em::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -0.05em;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 106, 43, 0.6) 20%, rgba(255, 106, 43, 0.6) 80%, transparent);
}

.hero__intro {
  max-width: 58ch;
  margin-top: var(--s-4);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: rgba(244, 239, 227, 0.82);
  opacity: 0;
  transform: translateY(20px);
  animation: rise 1.2s var(--ease-expo) 0.75s forwards;
}

@keyframes rise {
  to { opacity: 1; transform: translateY(0); }
}
/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 0.875rem 1.5rem;
  text-decoration: none;
  transition: all 0.3s var(--ease-quart);
  letter-spacing: 0.005em;
  border-radius: 1px;
  cursor: pointer;
}
.btn--primary {
  background: var(--color-accent);
  color: var(--color-abyss);
  box-shadow: 0 12px 32px rgba(255, 106, 43, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
.btn--primary:hover {
  background: var(--color-accent-lt);
  transform: translateY(-2px);
  box-shadow: 0 18px 44px rgba(255, 106, 43, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}
.btn--large {
  font-size: 1.0625rem;
  padding: 1.125rem 2.25rem;
}

/* ============================================================
   Industries strip
   ============================================================ */

.industries {
  background: var(--color-abyss);
  color: var(--color-paper);
  padding: var(--s-7) var(--pad);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.industries::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(79, 195, 215, 0.12), transparent 60%),
    radial-gradient(ellipse 50% 60% at 20% 80%, rgba(255, 106, 43, 0.06), transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.industries::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(168, 224, 234, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 224, 234, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 100% 100% at 50% 50%, black 40%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse 100% 100% at 50% 50%, black 40%, transparent 90%);
  pointer-events: none;
  z-index: 0;
}
.industries__inner {
  position: relative;
  z-index: 1;
  max-width: 1240px;
  margin: 0 auto;
}
.industries__lead {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.4vw, 2.75rem);
  font-weight: 300;

  max-width: 26ch;
  margin: 0 auto var(--s-6);
  text-align: center;
  line-height: 1.15;
  color: var(--color-paper);
}
.industries__list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: rgba(168, 224, 234, 0.18);
  border: 1px solid rgba(168, 224, 234, 0.18);
}
.industries__list li {
  background: var(--color-abyss);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--s-3) var(--s-2);
  min-height: 120px;
  color: var(--color-paper);
  position: relative;
  overflow: hidden;
}
.industries__name {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 400;
  line-height: 1.15;
  max-width: 14ch;

}

/* ============================================================
   Two ways
   ============================================================ */

.two-ways {
  padding: var(--s-7) var(--pad);
  max-width: var(--container);
  margin: 0 auto;
}
.two-ways__header {
  margin-bottom: var(--s-6);
  max-width: 34ch;
}
.two-ways__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-3);
}
.two-ways__card {
  background: var(--color-navy);
  color: var(--color-paper);
  padding: var(--s-5) var(--s-4) var(--s-4);
  position: relative;
  min-height: 420px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  isolation: isolate;
}
.two-ways__card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(168, 224, 234, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 224, 234, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 80% 100%, black, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 80% 100%, black, transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.two-ways__card--oneoff { background: var(--color-abyss); }
.two-ways__card > * { position: relative; z-index: 1; }
.two-ways__card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--s-5);
}
.two-ways__tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-accent);
}
.two-ways__marker {
  color: var(--color-accent);
  font-size: 1.5rem;
  line-height: 1;
  text-shadow: 0 0 10px var(--color-accent);
}
.two-ways__card h3 {
  font-size: clamp(1.875rem, 3vw, 2.625rem);
  font-weight: 350;
  margin-bottom: var(--s-3);
  max-width: 13ch;
  color: var(--color-paper);

}
.two-ways__card p {
  font-size: 1rem;
  line-height: 1.7;
  color: rgba(244, 239, 227, 0.78);
  max-width: 42ch;
  margin-bottom: auto;
}
.two-ways__link {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  text-decoration: none;
  color: var(--color-cyan-lt);
  padding-top: var(--s-3);
  margin-top: var(--s-4);
  border-top: 1px solid rgba(244, 239, 227, 0.15);
  transition: color 0.25s var(--ease-quart);
}
.two-ways__link:hover { color: var(--color-accent); }

/* ============================================================
   Closing
   ============================================================ */

.closing {
  padding: var(--s-8) var(--pad);
  background: var(--color-paper-2);
  text-align: center;
  border-top: 1px solid var(--color-rule);
  border-bottom: 1px solid var(--color-rule);
  position: relative;
}
.closing::before, .closing::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 64px;
  height: 1px;
  background: var(--color-accent);
}
.closing::before { left: var(--pad); }
.closing::after  { right: var(--pad); }
.closing__inner {
  max-width: 720px;
  margin: 0 auto;
}
.closing__headline {
  font-size: clamp(2rem, 4.8vw, 3.75rem);
  font-weight: 300;

  max-width: 20ch;
  margin: 0 auto var(--s-5);
  line-height: 1.1;
}

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
  background: var(--color-abyss);
  color: var(--color-paper);
  padding: var(--s-6) var(--pad) var(--s-4);
}
.site-footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--s-5);
  align-items: start;
  padding-bottom: var(--s-4);
  border-bottom: 1px solid rgba(168, 224, 234, 0.12);
}
.site-footer__wordmark {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 500;
  margin-bottom: var(--s-2);

}
.site-footer__wordmark span {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-cyan-lt);
  margin-left: 0.375rem;
}
.site-footer__line {
  font-size: 0.875rem;
  color: rgba(244, 239, 227, 0.65);
  max-width: 44ch;
  line-height: 1.6;
}
.site-footer__label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-accent);
  margin-bottom: var(--s-2);
}
.site-footer nav ul {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  font-size: 0.875rem;
}
.site-footer nav a {
  text-decoration: none;
  color: rgba(244, 239, 227, 0.78);
  transition: color 0.25s;
}
.site-footer nav a:hover { color: var(--color-cyan-lt); }
.site-footer__meta p {
  font-size: 0.8125rem;
  color: rgba(244, 239, 227, 0.7);
  margin-bottom: 0.375rem;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}
.site-footer__copyright {
  margin-top: var(--s-2) !important;
  color: rgba(244, 239, 227, 0.4) !important;
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 1040px) {
  .industries__list { grid-template-columns: repeat(2, 1fr); }
  .industries__list li:last-child { grid-column: 1 / -1; }
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; }

  /* Nav collapses to a dropdown panel below the header */
  .site-nav {
    position: absolute;
    top: 100%;
    left: var(--pad);
    right: var(--pad);
    display: none;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul {
    flex-direction: column;
    gap: 0;
    background: var(--color-abyss);
    border: 1px solid rgba(168, 224, 234, 0.18);
    box-shadow: 0 18px 44px rgba(5, 15, 28, 0.4);
  }
  .site-nav li { width: 100%; }
  .site-nav li:not(:last-child) { border-bottom: 1px solid rgba(168, 224, 234, 0.12); }
  .site-nav a,
  .site-nav__cta {
    display: block;
    padding: var(--s-2) var(--s-3) !important;
    border: none !important;
    color: rgba(244, 239, 227, 0.85) !important;
  }
  .site-nav a:not(.site-nav__cta)::after { display: none; }
  .site-nav__cta:hover { background: rgba(244, 239, 227, 0.06) !important; color: var(--color-paper) !important; }

  /* Light-header pages: paper panel, ink text */
  .site-header--light .site-nav ul {
    background: var(--color-paper);
    border-color: var(--color-rule);
  }
  .site-header--light .site-nav li:not(:last-child) { border-bottom-color: var(--color-rule); }
  .site-header--light .site-nav a,
  .site-header--light .site-nav__cta { color: var(--color-ink-2) !important; }
  .site-header--light .site-nav a[aria-current="page"] { color: var(--color-ink) !important; }
  .site-header--light .site-nav__cta:hover { background: rgba(11, 20, 32, 0.05) !important; color: var(--color-ink) !important; }

  .two-ways__grid,
  .site-footer__inner { grid-template-columns: 1fr; }
  .industries__list { grid-template-columns: 1fr; }
  .industries__list li:last-child { grid-column: 1; }
  .closing::before, .closing::after { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .hero__canvas { display: none; }
  .hero__headline, .hero__intro {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ============================================================
   Inner-page header (light variant)
   ============================================================ */

.site-header--light {
  position: relative;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-rule);
}
.site-header--light .wordmark__name {
  background: linear-gradient(90deg, var(--color-ink), var(--color-navy-mid));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.site-header--light .wordmark__suffix { color: var(--color-ink-2); }
.site-header--light .site-nav a { color: var(--color-ink-2); }
.site-header--light .site-nav a:hover { color: var(--color-ink); }
.site-header--light .site-nav__cta {
  border-color: rgba(11, 20, 32, 0.32);
  color: var(--color-ink) !important;
}
.site-header--light .site-nav__cta:hover {
  background: var(--color-ink);
  color: var(--color-paper) !important;
}
.site-header--light .site-nav a[aria-current="page"] {
  color: var(--color-ink);
}
.site-header--light .site-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(1);
}

/* ============================================================
   Page header (inner pages)
   ============================================================ */

.page-header {
  padding: var(--s-7) var(--pad) var(--s-4);
  max-width: var(--container);
  margin: 0 auto;
}
.page-header__headline {
  font-size: clamp(2.25rem, 5.6vw, 4.75rem);
  font-weight: 300;
  line-height: 1.04;
  letter-spacing: -0.022em;
  max-width: 18ch;
  margin-top: var(--s-3);
}
.page-header__headline em {
  font-style: italic;
  font-weight: 350;
  color: var(--color-accent);
  position: relative;
}
.page-header__headline em::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -0.04em;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 106, 43, 0.55) 15%, rgba(255, 106, 43, 0.55) 85%, transparent);
}
/* Page lede — relocated intro paragraph sitting directly under the inner-page
   header. Keeps the header itself to eyebrow + headline (the Operational
   Forecasts pattern); the lede carries any supporting copy below it. */
.page-lede {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad) var(--s-6);
}
.page-lede p {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-ink-2);
  max-width: 56ch;
  margin-bottom: var(--s-2);
}
.page-lede p:last-child { margin-bottom: 0; }
.page-lede strong { color: var(--color-ink); font-weight: 500; }

/* ============================================================
   Generic section heads
   ============================================================ */

.section-head {
  margin-bottom: var(--s-6);
  max-width: 36ch;
}
.section-head--light .section-title { color: var(--color-paper); }
.section-eyebrow--light { color: rgba(244, 239, 227, 0.78); }

/* ============================================================
   Spec table (tier__list) — modelling packages / products on Studies
   ============================================================ */

.tier__list { display: flex; flex-direction: column; }
.tier__row {
  display: grid;
  grid-template-columns: minmax(140px, 1fr) 3fr;
  gap: var(--s-3);
  padding: var(--s-3) 0;
  border-top: 1px solid var(--color-rule);
  align-items: baseline;
}
.tier__row:last-child { border-bottom: 1px solid var(--color-rule); }
.tier__var {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-ink);
}
.tier__desc {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-ink-2);
}

/* ============================================================
   Backbone (the navy band — page's only dark pivot)
   ============================================================ */

.backbone {
  background: var(--color-abyss);
  color: var(--color-paper);
  padding: var(--s-7) var(--pad);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.backbone::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse 50% 60% at 70% 30%, rgba(79, 195, 215, 0.10), transparent 60%),
    radial-gradient(ellipse 40% 50% at 30% 80%, rgba(255, 106, 43, 0.05), transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.backbone__inner {
  position: relative;
  z-index: 1;
  max-width: var(--container);
  margin: 0 auto;
}
.backbone__lede {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: rgba(244, 239, 227, 0.82);
  max-width: 60ch;
  margin-bottom: var(--s-5);
}
.backbone__lede strong { color: var(--color-paper); font-weight: 500; }
/* Tighten the gap when two ledes stack as a connected pair */
.backbone__lede:has(+ .backbone__lede) { margin-bottom: var(--s-3); }

/* Light variant — paper background (regional band).
   The SST map is a self-contained dark object, so it keeps its own
   frame; a soft shadow lifts it off the paper to retain presence. */
.backbone--light {
  background: transparent;
  color: var(--color-ink);
  padding-top: 0;
}
.backbone--light::before { display: none; }
.backbone--light .backbone__lede { color: var(--color-ink-2); }
.backbone--light .backbone__lede strong { color: var(--color-ink); }
.backbone--light .backbone__map {
  box-shadow: 0 18px 48px rgba(11, 20, 32, 0.18);
}

.backbone__figure { margin: 0; }

/* Callout — the ML-correction aside below the example map.
   Lifted clear of the image and accented so it reads as a distinct offer. */
.backbone__callout {
  margin-top: var(--s-6);
  max-width: 56ch;
  padding: var(--s-4) var(--s-5);
  border-left: 3px solid var(--color-accent);
  background: rgba(255, 106, 43, 0.06);
}
.backbone__callout-lead {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 350;
  font-size: clamp(1.25rem, 2.2vw, 1.625rem);
  line-height: 1.2;
  color: var(--color-ink);
  margin: 0 0 var(--s-2);
}
.backbone__callout-body {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-ink-2);
  margin: 0;
}

.backbone__map-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  z-index: 1;
}

.backbone__map {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-navy);
  border: 1px solid rgba(168, 224, 234, 0.18);
  overflow: hidden;
  isolation: isolate;
  display: flex;
  align-items: center;
  justify-content: center;
}
.backbone__map-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(168, 224, 234, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 224, 234, 0.06) 1px, transparent 1px);
  background-size: 96px 96px;
  z-index: 0;
}
.backbone__map-info {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  z-index: 5;
  margin: 0;
  padding: var(--s-4) var(--s-5) var(--s-4) var(--s-3);
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: var(--s-3);
  row-gap: 5px;
  align-items: baseline;
  max-width: min(58%, 36rem);
  pointer-events: none;
  /* Soft scrim fading from left into the data — no hard edges */
  background:
    radial-gradient(
      ellipse 100% 75% at left center,
      rgba(11, 20, 32, 0.62) 0%,
      rgba(11, 20, 32, 0.40) 55%,
      rgba(11, 20, 32, 0) 100%
    );
  animation: backbone-info-in 700ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
}
@keyframes backbone-info-in {
  from { opacity: 0; transform: translate(-6px, -50%); }
  to   { opacity: 1; transform: translate(0, -50%); }
}
.backbone__map-info-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 400;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: rgba(168, 224, 234, 0.55);
}
.backbone__map-info-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--color-paper);
  display: flex;
  align-items: center;
  gap: var(--s-2);
}
.backbone__map-info-rule {
  grid-column: 1 / -1;
  height: 1px;
  margin: 3px 0 1px;
  border: none;
  background: linear-gradient(
    to right,
    rgba(168, 224, 234, 0.32) 0%,
    rgba(168, 224, 234, 0.05) 70%,
    rgba(168, 224, 234, 0) 100%
  );
}
.backbone__map-info-live {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0;
  transform: scale(0.4);
  transition: opacity 600ms ease-out, transform 600ms cubic-bezier(0.2, 1.4, 0.4, 1);
}
.backbone__map-info-live.is-live {
  opacity: 1;
  transform: scale(1);
  animation: backbone-live-pulse 2600ms ease-in-out 700ms infinite;
}
@keyframes backbone-live-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 106, 43, 0); }
  50%      { box-shadow: 0 0 0 4px rgba(255, 106, 43, 0.22); }
}
@media (prefers-reduced-motion: reduce) {
  .backbone__map-info { animation: none; }
  .backbone__map-info-live, .backbone__map-info-live.is-live {
    transition: opacity 300ms;
    transform: none;
    animation: none;
  }
}
/* Variables overlay — bottom strip listing the forecast suite.
   Complements the left-hand info panel; scrim fades upward into the data. */
.backbone__map-vars {
  position: absolute;
  left: 0; right: 0;
  bottom: 9%;
  z-index: 4;
  padding: var(--s-3);
  pointer-events: none;
  /* Soft band fading at both edges so it floats clear of the colorbar */
  background: linear-gradient(
    to top,
    rgba(11, 20, 32, 0) 0%,
    rgba(11, 20, 32, 0.52) 24%,
    rgba(11, 20, 32, 0.52) 76%,
    rgba(11, 20, 32, 0) 100%
  );
}
.backbone__map-vars-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 400;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: rgba(168, 224, 234, 0.55);
  margin-bottom: var(--s-2);
}
.backbone__map-vars-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  row-gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--color-paper);
}
.backbone__map-vars-list li:not(:last-child)::after {
  content: "\00B7";
  margin: 0 var(--s-3);
  color: rgba(168, 224, 234, 0.40);
}
/* ─── per-site products: dark-context overrides ─── */
.example {
  padding-top: var(--s-5);
  margin-top: var(--s-5);
  border-top: 1px solid var(--color-rule);
}
.example:first-of-type {
  margin-top: 0;
  border-top: 0;
  padding-top: 0;
}
.example__head { margin-bottom: var(--s-4); }
.example__num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--s-2);
}
.example__title {
  font-size: clamp(1.5rem, 2.8vw, 2.25rem);
  font-weight: 350;
  max-width: 22ch;
}
.example__layout {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--s-5);
  align-items: start;
}
.example__layout--reversed { grid-template-columns: 7fr 5fr; }
.example__copy dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--s-2) var(--s-4);
  margin-bottom: var(--s-4);
}
.example__copy dt {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  padding-top: 0.25rem;
}
.example__copy dd {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-ink-2);
}
.example__caption {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-style: italic;
  color: var(--color-ink);
  border-left: 1px solid var(--color-accent);
  padding-left: var(--s-3);
  margin-bottom: var(--s-4);
  line-height: 1.5;
}
.example__demo-link {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 3px;
  transition: color 0.25s var(--ease-quart);
}
.example__demo-link:hover { color: var(--color-accent); }

.example__figure { margin: 0; }

.example__chart--live { display: block; }
.example__chart-inner {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.example__chart {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-paper-2);
  border: 1px solid var(--color-rule);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
/* ─── per-site products on the dark backbone strip ─── */
.backbone .example {
  margin-top: var(--s-6);
  padding-top: var(--s-5);
  border-top: 1px solid rgba(168, 224, 234, 0.18);
}
.backbone .example:first-of-type {
  margin-top: var(--s-6);
  padding-top: var(--s-5);
  border-top: 1px solid rgba(168, 224, 234, 0.18);
}
.backbone .example__title { color: var(--color-paper); }
.backbone--light .example__title { color: var(--color-ink); }
.backbone--light .example__head {
  border-top: 1px solid var(--color-rule);
  padding-top: var(--s-5);
}
.backbone .example__copy dt { color: rgba(168, 224, 234, 0.55); }
.backbone .example__copy dd { color: rgba(244, 239, 227, 0.78); }
.backbone .example__caption {
  color: var(--color-paper);
  border-left-color: var(--color-accent);
}
.backbone .example__demo-link {
  color: var(--color-paper);
  border-bottom-color: var(--color-accent);
}
.backbone .example__demo-link:hover { color: var(--color-accent-lt); }
.backbone .example__chart {
  background: var(--color-paper-2);
  border-color: rgba(168, 224, 234, 0.18);
}

/* ============================================================
   Studies page
   ============================================================ */

.studies {
  padding: 0 var(--pad) var(--s-7);
  max-width: var(--container);
  margin: 0 auto;
  border-top: 1px solid var(--color-rule);
}
.studies__inner {
  max-width: var(--container);
  margin: 0 auto;
}

.study {
  padding-top: var(--s-6);
  padding-bottom: var(--s-6);
  border-top: 1px solid var(--color-rule);
  max-width: 65ch;
}
.study:first-of-type {
  border-top: 0;
  padding-top: var(--s-5);
}

.study--lead {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(240px, 1fr) 2.2fr;
  gap: var(--s-5);
  align-items: start;
  padding-bottom: var(--s-7);
}

.study--lead .study__head {
  position: sticky;
  top: var(--s-3);
}

.study__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  margin-bottom: var(--s-3);
}

.study__title {
  font-size: clamp(1.75rem, 3.4vw, 2.5rem);
  font-weight: 350;
  line-height: 1.08;
  letter-spacing: -0.018em;
  max-width: 22ch;
}
.study--lead .study__title {
  max-width: 16ch;
}

.study__summary {
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 1.9vw, 1.375rem);
  font-style: italic;
  font-weight: 350;
  color: var(--color-ink-2);
  margin-top: var(--s-3);
  max-width: 32ch;
  line-height: 1.3;
}

.study__body {
  margin-top: var(--s-4);
}
.study--lead .study__body {
  margin-top: 0;
}

.study__block + .study__block {
  margin-top: var(--s-5);
}
.study__subhead {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  margin-bottom: var(--s-2);
}

.study__note {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-ink-2);
  margin-top: var(--s-4);
  max-width: 60ch;
}

.study__operationalise {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-ink-2);
  margin-top: var(--s-3);
  max-width: 60ch;
}
.study__operationalise a {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 1px;
  margin-left: 0.25rem;
  transition: color 0.25s var(--ease-quart);
}
.study__operationalise a:hover { color: var(--color-accent); }

/* ============================================================
   Responsive — inner page additions
   ============================================================ */

@media (max-width: 1040px) {
  .example__layout,
  .example__layout--reversed { grid-template-columns: 1fr; }
  .example__layout--reversed .example__figure { order: 2; }
  .study--lead { grid-template-columns: 1fr; gap: var(--s-4); }
  .study--lead .study__head { position: relative; top: 0; }
}

@media (max-width: 720px) {
  .tier__row {
    grid-template-columns: 1fr;
    gap: var(--s-1);
  }
  .example__copy dl {
    grid-template-columns: 1fr;
    gap: var(--s-1) 0;
  }
  .example__copy dt { padding-top: var(--s-2); }
  .backbone__map-info {
    padding: var(--s-2) var(--s-3) var(--s-2) var(--s-2);
    column-gap: var(--s-2);
    row-gap: 3px;
    max-width: 78%;
  }
  .backbone__map-info-label { font-size: 0.5625rem; letter-spacing: 0.16em; }
  .backbone__map-info-value { font-size: 0.6875rem; }
  .backbone__map-vars { padding: var(--s-2); bottom: 8%; }
  .backbone__map-vars-label { font-size: 0.5625rem; letter-spacing: 0.16em; }
  .backbone__map-vars-list { font-size: 0.6875rem; }
  .backbone__map-vars-list li:not(:last-child)::after { margin: 0 var(--s-2); }
}

/* ============================================================
   About page
   ============================================================ */

/* Why this business exists — flowing prose */
.why {
  padding: var(--s-7) var(--pad);
  max-width: var(--container);
  margin: 0 auto;
  border-top: 1px solid var(--color-rule);
}
.why__body {
  max-width: 60ch;
}
.why__body p {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--color-ink-2);
  margin-bottom: var(--s-3);
}
.why__body p:last-child {
  margin-bottom: 0;
}
.why__body strong {
  color: var(--color-ink);
  font-weight: 500;
}

/* Bio — Who runs it */
.bio {
  padding: var(--s-6) var(--pad) var(--s-7);
  max-width: var(--container);
  margin: 0 auto;
  border-top: 1px solid var(--color-rule);
}

.bio__lede {
  max-width: 60ch;
  margin-bottom: var(--s-6);
}
.bio__lede p {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--color-ink-2);
  margin-bottom: var(--s-3);
}
.bio__lede p:last-child { margin-bottom: 0; }
.bio__lede strong {
  font-weight: 500;
  color: var(--color-ink);
}

.bio__pubs {
  margin-top: var(--s-6);
  padding-top: var(--s-4);
  border-top: 1px solid var(--color-rule);
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-ink-2);
  max-width: 60ch;
}
.bio__pubs a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 1px;
  margin-left: 0.25rem;
  white-space: nowrap;
  transition: color 0.25s var(--ease-quart);
}
.bio__pubs a:hover { color: var(--color-accent); }