/* ==========================================================================
   SRI-2030 — sri-2030.org
   Faithful to the original Squarespace theme:
     · accent  hsl(83,100%,75%)  — "bright" lime section backgrounds
     · darkAccent hsl(209,73%,12%) — navy, as in the logo
     · lightAccent hsl(45,12%,87%) — stone "light" sections
     · Rubik 500 headings, -0.02em, sizes 4 / 2.8 / 2.2 / 1.6 rem
     · Nunito Sans 400 body, 1.5 line height
     · uppercase Nunito Sans buttons, 6.4px radius
   Flat, geometric, built from the logo's quadrant-tile language.
   ========================================================================== */

:root {
  --navy: hsl(209, 73%, 12%);
  --navy-deep: hsl(209, 73%, 8%);
  --lime: hsl(83, 100%, 75%);
  --stone: hsl(45, 12%, 87%);
  --white: #ffffff;
  --ink: hsl(209, 73%, 10%);

  /* the four logo tiles */
  --tile-green: #168038;
  --tile-yellow: #f6c31c;
  --tile-orange: #c2551a;
  --tile-cyan: #14a5d4;

  --font-head: "Rubik", system-ui, sans-serif;
  --font-body: "Nunito Sans", system-ui, sans-serif;

  --btn-radius: 6.4px;
  --container: 1200px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1.0625rem;
  line-height: 1.5;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(2.6rem, 5.2vw, 4rem); }
h2 { font-size: clamp(2rem, 3.6vw, 2.8rem); }
h3 { font-size: clamp(1.5rem, 2.6vw, 2.2rem); }
h4 { font-size: 1.6rem; }

p { margin: 0 0 1em; }

a { color: inherit; }

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 28px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--lime);
  color: var(--navy);
  padding: 10px 18px;
  font-weight: 700;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* Buttons — Squarespace-style: uppercase Nunito Sans, 6.4px radius, flat */

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  text-decoration: none;
  padding: 1.05em 2em;
  border-radius: var(--btn-radius);
  border: 0;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.btn-dark { background: var(--navy); color: var(--lime); }
.btn-dark:hover { background: var(--navy-deep); }

.btn-lime { background: var(--lime); color: var(--navy); }
.btn-lime:hover { background: hsl(83, 100%, 68%); }

/* The four-tile brand strip — the logo colours as a rule line */

.brand-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  height: 6px;
}
.brand-strip i:nth-child(1) { background: #1e9c43; }
.brand-strip i:nth-child(2) { background: var(--tile-yellow); }
.brand-strip i:nth-child(3) { background: #d9631e; }
.brand-strip i:nth-child(4) { background: var(--tile-cyan); }

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--navy);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 36px;
  min-height: 82px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--white);
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand img { width: 48px; height: 48px; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-left: auto;
}

.site-nav a {
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  padding: 4px 0;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--lime);
  box-shadow: 0 2px 0 var(--lime);
}

.site-nav .btn {
  padding: 0.8em 1.6em;
  font-size: 0.9375rem;
}
.site-nav a.btn-lime,
.site-nav a.btn-lime:hover { color: var(--navy); box-shadow: none; }

.nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--white);
  margin: 6px 0;
}

/* --------------------------------------------------------------------------
   Hero — navy, like the logo's ground
   -------------------------------------------------------------------------- */

.hero { background: var(--navy); color: var(--white); }

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 72px;
  align-items: center;
  padding-block: 96px;
}

.kicker {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--lime);
  display: block;
  margin-bottom: 20px;
}

.hero h1 { margin-bottom: 26px; }
.hero h1 em { font-style: normal; color: var(--lime); }

.hero .lead {
  font-size: 1.25rem;
  margin-bottom: 36px;
  color: hsla(0, 0%, 100%, 0.85);
}
.hero .lead strong { color: var(--white); }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* photo with flat lime offset — print style, no soft shadows */
.offset-photo { margin: 0; }
.offset-photo .frame { position: relative; }
.offset-photo .frame::before {
  content: "";
  position: absolute;
  inset: 18px -18px -18px 18px;
  background: var(--lime);
}
.offset-photo img {
  position: relative;
  width: 100%;
  height: 460px;
  object-fit: cover;
  object-position: center 72%;
}
.offset-photo figcaption {
  margin-top: 34px;
  font-size: 0.875rem;
  color: hsla(0, 0%, 100%, 0.6);
}

/* planting-grid dots, drawn from the logo's yellow tile */
.dot-grid {
  position: absolute;
  z-index: 1;
  top: -34px;
  left: -34px;
  width: 132px;
  height: 132px;
  background-image: radial-gradient(var(--tile-yellow) 7px, transparent 7.5px);
  background-size: 44px 44px;
  background-position: 12px 12px;
}

/* --------------------------------------------------------------------------
   Paradox band — lime, black text: the original "bright" section
   -------------------------------------------------------------------------- */

.paradox {
  background: var(--lime);
  color: var(--navy);
  padding-block: 72px;
}
.paradox-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}
.paradox .cell { border-top: 3px solid var(--navy); padding-top: 20px; }
.paradox .figure {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 2.6rem;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 10px;
}
.paradox .label { font-size: 0.9688rem; margin: 0; }

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */

.section { padding-block: 96px; }
.section.on-navy { background: var(--navy); color: var(--white); }
.section.on-lime { background: var(--lime); color: var(--navy); }
.section.on-stone { background: var(--stone); color: var(--navy); }

.section-head { max-width: 780px; margin-bottom: 56px; }
.section-head p { font-size: 1.1875rem; margin-bottom: 0; }
.on-navy .section-head p { color: hsla(0, 0%, 100%, 0.85); }

/* --------------------------------------------------------------------------
   The principles — the logo's quadrant grid, blown up
   -------------------------------------------------------------------------- */

.tile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.tile {
  padding: 40px 36px 44px;
  min-height: 300px;
  display: flex;
  flex-direction: column;
}

.tile .mark { height: 66px; margin-bottom: 28px; }
.tile .mark svg { height: 100%; width: auto; display: block; }

.tile h3 {
  font-size: 1.6rem;
  margin-bottom: 12px;
}
.tile p { margin: 0; font-size: 1rem; max-width: 34em; }

.tile-yellow { background: var(--tile-yellow); color: var(--navy); }
.tile-green  { background: var(--tile-green);  color: var(--white); }
.tile-cyan   { background: var(--tile-cyan);   color: var(--navy); }
.tile-orange { background: var(--tile-orange); color: var(--white); }

.tile-yellow .mark, .tile-cyan .mark { color: var(--navy); }
.tile-green .mark, .tile-orange .mark { color: hsla(0, 0%, 100%, 0.95); }

.after-tiles {
  max-width: 860px;
  margin-top: 64px;
  font-size: 1.1875rem;
}
.after-tiles p { margin: 0; }

/* --------------------------------------------------------------------------
   How SRI-2030 works — editorial numbered columns on lime
   -------------------------------------------------------------------------- */

.strategy {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}

.strategy .col { border-top: 3px solid var(--navy); padding-top: 24px; }

.strategy .n {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 3.4rem;
  line-height: 1;
  letter-spacing: -0.02em;
  display: block;
  margin-bottom: 18px;
}

.strategy p { margin: 0; font-size: 1rem; }

/* --------------------------------------------------------------------------
   Certification — ascending steps
   -------------------------------------------------------------------------- */

.cert-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: end;
}

.cert-copy p { font-size: 1.0625rem; }
.cert-copy .cert-cta { margin-top: 30px; margin-bottom: 18px; }
.cert-copy .contact-line { font-size: 0.9688rem; margin: 0; }
.cert-copy .contact-line a { color: var(--navy); font-weight: 700; }

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  align-items: end;
}

.step { display: flex; flex-direction: column; gap: 12px; }

.step .block {
  background: var(--navy);
  color: var(--lime);
  display: flex;
  align-items: flex-start;
  padding: 16px;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1.6rem;
}
.step:nth-child(1) .block { height: 110px; }
.step:nth-child(2) .block { height: 160px; }
.step:nth-child(3) .block { height: 210px; }
.step:nth-child(4) .block { height: 260px; background: var(--tile-green); color: var(--white); }

.step h3 {
  font-size: 1.0625rem;
  letter-spacing: 0;
  margin: 0;
}
.step p { font-size: 0.875rem; margin: 0; }

/* --------------------------------------------------------------------------
   Mission — lime, huge navy type, planting grid
   -------------------------------------------------------------------------- */

.mission {
  background: var(--lime);
  color: var(--navy);
  padding-block: 110px;
  position: relative;
  overflow: hidden;
}

/* The band closes on a tertiary call to action — an underlined link rather
   than a button. Navy on lime is 14.5:1, so it stays fully legible. */
.mission .tertiary {
  display: inline-block;
  position: relative;
  color: var(--navy);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: hsla(209, 73%, 12%, 0.35);
  text-underline-offset: 0.3em;
  transition: text-decoration-color 0.15s ease;
}
.mission .tertiary:hover { text-decoration-color: var(--navy); }
.mission .dots {
  position: absolute;
  right: -20px;
  bottom: -20px;
  width: 300px;
  height: 220px;
  background-image: radial-gradient(var(--navy) 7px, transparent 7.5px);
  background-size: 52px 52px;
  opacity: 0.18;
}
.mission .kicker { color: var(--navy); }
.mission h2 {
  font-size: clamp(2.4rem, 5.4vw, 4rem);
  max-width: 15em;
  margin-bottom: 20px;
}
.mission p { font-size: 1.25rem; margin-bottom: 36px; max-width: 40em; }

/* --------------------------------------------------------------------------
   People page
   -------------------------------------------------------------------------- */

.page-hero {
  background: var(--navy);
  color: var(--white);
  padding-block: 88px 64px;
}
.page-hero .lead {
  font-size: 1.25rem;
  color: hsla(0, 0%, 100%, 0.85);
  margin: 0;
  max-width: 40em;
}

.page-banner { background: var(--navy); padding-bottom: 96px; }
.page-banner .offset-photo img { height: 440px; object-position: center 40%; }

/* Patron — editorial, on lime */
.patron p {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  letter-spacing: -0.02em;
  line-height: 1.35;
  max-width: 30em;
  margin: 0;
}
.patron .name {
  margin-top: 28px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* People — editorial rows, square tile monograms like the logo quadrants */

.people-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 64px;
}

.person {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 24px;
  padding-block: 36px;
  border-top: 2px solid var(--navy);
}
.on-navy .person { border-top-color: hsla(0, 0%, 100%, 0.25); }

.monogram {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1.35rem;
  color: var(--white);
}
.monogram.m-green  { background: var(--tile-green); }
.monogram.m-yellow { background: var(--tile-yellow); color: var(--navy); }
.monogram.m-orange { background: var(--tile-orange); }
.monogram.m-cyan   { background: var(--tile-cyan); color: var(--navy); }
.monogram.m-navy   { background: var(--navy); color: var(--lime); }
.on-navy .monogram.m-navy { background: var(--lime); color: var(--navy); }

.person h3 {
  font-size: 1.35rem;
  margin-bottom: 2px;
}
.person .role {
  font-weight: 700;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}
.person p { margin: 0; font-size: 0.9688rem; }

/* Roots — two columns on navy */
.roots-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}
.roots-grid > div { border-top: 3px solid var(--lime); padding-top: 24px; }
.roots-grid h3 { font-size: 1.6rem; }
.roots-grid p { margin: 0; color: hsla(0, 0%, 100%, 0.85); }
.roots-grid a { color: var(--lime); }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  background: var(--navy-deep);
  color: hsla(0, 0%, 100%, 0.75);
  font-size: 0.9375rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-block: 64px 44px;
}

.site-footer .brand { font-size: 1.15rem; margin-bottom: 18px; }
.site-footer .brand img { width: 40px; height: 40px; }

.footer-grid h4 {
  color: var(--white);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-grid a { color: hsla(0, 0%, 100%, 0.75); text-decoration: none; }
.footer-grid a:hover { color: var(--lime); }

.footer-about { max-width: 34em; }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  padding-block: 22px 40px;
  border-top: 1px solid hsla(0, 0%, 100%, 0.15);
  font-size: 0.875rem;
  color: hsla(0, 0%, 100%, 0.5);
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1000px) {
  .hero-inner { grid-template-columns: 1fr; gap: 64px; padding-block: 72px; }
  .offset-photo img { height: 380px; }
  .paradox-inner { grid-template-columns: 1fr 1fr; }
  .strategy { grid-template-columns: 1fr; gap: 40px; }
  .cert-layout { grid-template-columns: 1fr; gap: 56px; }
  .people-list { grid-template-columns: 1fr; }
  .roots-grid { grid-template-columns: 1fr; gap: 48px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  .section { padding-block: 72px; }

  .nav-toggle { display: block; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    background: var(--navy);
    padding: 12px 28px 24px;
    display: none;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 8px 0; }

  .tile-grid { grid-template-columns: 1fr; }
  .tile { min-height: 0; }
  .paradox-inner { grid-template-columns: 1fr; gap: 28px; }
  .steps { gap: 8px; }
  .step .block { font-size: 1.2rem; padding: 10px; }
  .step:nth-child(1) .block { height: 80px; }
  .step:nth-child(2) .block { height: 115px; }
  .step:nth-child(3) .block { height: 150px; }
  .step:nth-child(4) .block { height: 185px; }
  .step h3 { font-size: 0.9375rem; }
  .step p { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .dot-grid { display: none; }
  .offset-photo .frame::before { inset: 12px -12px -12px 12px; }
}