:root {
  --ink: #202629;
  --muted: #586862;
  --paper: #fbfcfa;
  --soft: #eef6f3;
  --line: #d7e4df;
  --green: #23684d;
  --teal: #9bdcdb;
  --blue: #2f6fa6;
  --pink: #d94c70;
  --yellow: #f5df68;
  --shadow: 0 18px 44px rgba(34, 67, 53, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

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

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 12px clamp(18px, 4vw, 56px);
  background: rgba(251, 252, 250, 0.94);
  border-bottom: 1px solid rgba(35, 104, 77, 0.14);
  backdrop-filter: blur(18px);
}

.brand {
  flex: 0 0 auto;
  width: clamp(156px, 20vw, 230px);
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 30px);
  font-size: 0.92rem;
  font-weight: 700;
}

.site-header nav a {
  text-decoration: none;
}

.nav-cta {
  padding: 10px 16px;
  color: #fff;
  background: var(--green);
  border-radius: 999px;
}

.hero {
  position: relative;
  display: grid;
  min-height: calc(92vh - 76px);
  overflow: hidden;
  padding: clamp(56px, 9vw, 110px) clamp(20px, 5vw, 72px) 28px;
  isolation: isolate;
}

.hero::before {
  position: absolute;
  inset: 0;
  z-index: -3;
  content: "";
  background:
    linear-gradient(120deg, rgba(251, 252, 250, 0.98) 0%, rgba(251, 252, 250, 0.94) 54%, rgba(155, 220, 219, 0.18) 100%),
    linear-gradient(155deg, rgba(245, 223, 104, 0.14), rgba(155, 220, 219, 0.18) 48%, rgba(47, 111, 166, 0.1));
}

.hero::after {
  position: absolute;
  right: -10vw;
  bottom: -10vw;
  z-index: -2;
  width: 54vw;
  height: 54vw;
  min-width: 420px;
  min-height: 420px;
  content: "";
  background: linear-gradient(135deg, rgba(47, 111, 166, 0.22), rgba(155, 220, 219, 0.2));
  clip-path: polygon(18% 0, 100% 20%, 78% 100%, 0 75%);
  opacity: 0.16;
}

.hero-art {
  position: absolute;
  right: max(24px, 5vw);
  top: clamp(96px, 12vw, 140px);
  z-index: -1;
  width: min(42vw, 620px);
  opacity: 0.14;
  transform: rotate(-4deg);
}

.hero-content {
  width: min(760px, 100%);
  align-self: center;
  padding-bottom: 30px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 920px;
  margin: 0;
  font-size: clamp(3.1rem, 7vw, 6rem);
  line-height: 0.9;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4.2vw, 4.7rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 10px;
  font-size: 1.3rem;
  line-height: 1.1;
}

.hero-copy {
  max-width: 720px;
  margin: 28px 0 0;
  color: #35413b;
  font-size: clamp(1.1rem, 1.8vw, 1.42rem);
}

.hero-copy.small {
  max-width: 660px;
  margin-top: 16px;
  color: var(--muted);
  font-size: clamp(1rem, 1.35vw, 1.14rem);
}

.hero-actions,
.cta-inner,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.hero-actions {
  margin-top: 34px;
}

.button {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 22px;
  border: 2px solid var(--green);
  border-radius: 999px;
  font-weight: 900;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
}

.button.primary {
  color: #fff;
  background: var(--green);
}

.button.secondary {
  color: var(--green);
  background: transparent;
}

.button.dark {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}

.hero-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  align-self: end;
  width: min(900px, 100%);
  margin-top: 20px;
  background: rgba(35, 104, 77, 0.18);
  border: 1px solid rgba(35, 104, 77, 0.18);
}

.hero-strip span {
  min-width: 0;
  padding: 16px 12px;
  background: rgba(255, 253, 247, 0.78);
  color: var(--green);
  font-weight: 900;
  text-align: center;
}

.section,
.intro-band,
.timeline-section,
.cta-band {
  padding: clamp(70px, 9vw, 124px) clamp(20px, 5vw, 72px);
}

.section-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 1fr);
  gap: clamp(34px, 6vw, 86px);
  align-items: start;
}

.intro-band {
  background: #fff;
  color: var(--ink);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.intro-band .eyebrow,
.cta-band .eyebrow {
  color: var(--green);
}

.intro-text {
  display: grid;
  gap: 18px;
  color: var(--muted);
  font-size: clamp(1rem, 1.45vw, 1.22rem);
}

.intro-text p,
.prize-lead p {
  margin: 0;
}

.section-heading {
  width: min(840px, 100%);
  margin-bottom: clamp(32px, 5vw, 58px);
}

.idea-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.idea-grid article {
  min-height: 260px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 28px rgba(33, 53, 43, 0.07);
}

.idea-grid span {
  display: inline-block;
  margin-bottom: 50px;
  color: var(--blue);
  font-weight: 900;
}

.idea-grid p,
.faq-list p,
.benefits,
.prize-lead {
  color: var(--muted);
}

.timeline-section,
.challenges-section {
  background: #eaf4f1;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline li {
  position: relative;
  min-height: 180px;
  padding: 24px 20px;
  background: var(--paper);
  border-top: 6px solid var(--green);
  box-shadow: var(--shadow);
}

.timeline time {
  display: block;
  margin-bottom: 18px;
  color: var(--blue);
  font-weight: 900;
}

.timeline strong {
  display: block;
  font-size: 1.18rem;
  line-height: 1.2;
}

.highlight {
  background: var(--paper);
}

.criteria-list {
  display: grid;
  gap: 12px;
}

.criteria-list div {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 16px;
  align-items: center;
  padding: 17px 18px;
  background: #fff;
  border-left: 7px solid var(--blue);
  box-shadow: 0 10px 22px rgba(33, 53, 43, 0.08);
}

.criteria-list strong {
  color: var(--green);
  font-size: 1.45rem;
}

.prizes {
  background: #fff;
}

.prize-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.75fr) minmax(0, 1.25fr);
  gap: clamp(28px, 5vw, 70px);
}

.prize-lead {
  padding: 26px;
  background: var(--soft);
  border-radius: 8px;
  font-size: 1.16rem;
}

.benefits {
  display: grid;
  gap: 13px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.benefits li {
  position: relative;
  padding: 0 0 0 26px;
}

.benefits li::before {
  position: absolute;
  top: 0.62em;
  left: 0;
  width: 10px;
  height: 10px;
  content: "";
  background: var(--yellow);
  border: 2px solid var(--green);
  transform: rotate(45deg);
}

.cash-awards {
  grid-column: 1 / -1;
  display: grid;
  gap: 18px;
  padding: clamp(20px, 3vw, 28px);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.cash-awards p,
.cash-awards dl,
.cash-awards dd {
  margin: 0;
}

.cash-awards p {
  max-width: 760px;
  color: var(--muted);
  font-weight: 700;
}

.cash-awards dl {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.cash-awards div {
  display: grid;
  gap: 4px;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.cash-awards dt {
  color: var(--green);
  font-weight: 900;
}

.cash-awards dd {
  color: var(--ink);
  font-size: 1.6rem;
  font-weight: 900;
}

.stage-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.stage-list span {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 11px 16px;
  color: var(--green);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 900;
  box-shadow: 0 8px 20px rgba(34, 67, 53, 0.06);
}

.challenge-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.challenge-list li {
  position: relative;
  min-height: 54px;
  padding: 15px 16px 15px 42px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: #394740;
  font-weight: 700;
}

.challenge-list li::before {
  position: absolute;
  top: 19px;
  left: 18px;
  width: 10px;
  height: 10px;
  content: "";
  background: var(--teal);
  border: 2px solid var(--green);
  border-radius: 50%;
}

.cta-band {
  background: #eaf4f1;
  color: var(--ink);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.cta-inner {
  justify-content: space-between;
  gap: 28px;
}

.cta-inner h2 {
  max-width: 720px;
}

.faq-section,
.stages-section,
.application-section {
  background: var(--soft);
}

.application-form {
  display: grid;
  gap: 22px;
  padding: clamp(18px, 4vw, 34px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.application-form fieldset {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.application-form legend {
  padding: 0 8px;
  color: var(--green);
  font-weight: 900;
}

.form-question {
  margin: 0;
  color: #394740;
  font-weight: 900;
}

.application-form label {
  display: grid;
  gap: 8px;
  color: #394740;
  font-weight: 800;
}

.application-form input,
.application-form textarea,
.application-form select {
  width: 100%;
  min-height: 46px;
  padding: 11px 12px;
  color: var(--ink);
  background: #fbfcfa;
  border: 1px solid #c8d8d1;
  border-radius: 7px;
  font: inherit;
  font-weight: 500;
}

.application-form textarea {
  min-height: 110px;
  resize: vertical;
}

.application-form input:focus,
.application-form textarea:focus,
.application-form select:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(35, 104, 77, 0.13);
  outline: none;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.form-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.option-grid,
.option-stack {
  display: grid;
  gap: 12px;
}

.option-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.option-grid.compact {
  grid-template-columns: repeat(2, minmax(180px, 260px));
}

.option-grid label,
.option-stack label,
.application-form label.full-width {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 10px;
  align-items: start;
  padding: 13px 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700;
}

.option-grid input,
.option-stack input,
.application-form label.full-width input {
  width: 16px;
  min-height: 16px;
  margin-top: 4px;
  padding: 0;
  accent-color: var(--green);
}

.form-hidden {
  display: none;
}

.form-note {
  margin: 0;
  padding: 14px 16px;
  color: var(--muted);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700;
}

.form-note a {
  color: var(--green);
  font-weight: 900;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  justify-content: flex-start;
}

.faq-list {
  display: grid;
  gap: 12px;
}

details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 22px rgba(33, 53, 43, 0.05);
}

summary {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 62px;
  padding: 18px 58px 18px 20px;
  font-weight: 900;
  cursor: pointer;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  position: absolute;
  right: 20px;
  width: 22px;
  height: 22px;
  color: #fff;
  content: "+";
  background: var(--green);
  border-radius: 50%;
  font-weight: 900;
  line-height: 22px;
  text-align: center;
}

details[open] summary::after {
  content: "-";
}

details p {
  margin: 0;
  padding: 0 20px 22px;
}

.site-footer {
  padding: 34px clamp(20px, 5vw, 72px) 42px;
  background: #fff;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(220px, 350px) 1fr auto;
  gap: 28px;
  align-items: center;
  width: min(1180px, 100%);
  margin: 0 auto;
}

.footer-inner p {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.footer-inner a {
  color: var(--green);
  font-weight: 900;
  white-space: nowrap;
}

@media (max-width: 920px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .site-header nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .hero {
    min-height: auto;
  }

  .hero-art {
    top: 140px;
    right: -120px;
    width: 560px;
  }

  .split,
  .prize-layout,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .idea-grid,
  .timeline,
  .challenge-list,
  .form-grid.three,
  .option-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-inner {
    align-items: start;
  }
}

@media (max-width: 620px) {
  .site-header nav {
    gap: 16px;
    font-size: 0.86rem;
  }

  .nav-cta {
    padding: 8px 12px;
  }

  .hero-content {
    padding-bottom: 28px;
  }

  .hero-copy {
    margin-top: 22px;
  }

  .hero-art {
    top: 370px;
    right: -190px;
    width: 560px;
    opacity: 0.09;
  }

  .hero-strip,
  .idea-grid,
  .timeline,
  .challenge-list,
  .cash-awards dl,
  .form-grid,
  .form-grid.three,
  .option-grid,
  .option-grid.compact {
    grid-template-columns: 1fr;
  }

  .hero-strip span {
    padding: 12px;
  }

  .idea-grid article,
  .timeline li {
    min-height: auto;
  }

  .idea-grid span {
    margin-bottom: 30px;
  }

  .criteria-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .button {
    width: 100%;
  }

  .application-form {
    padding: 14px;
  }

  .application-form fieldset {
    padding: 18px 14px;
  }
}