:root {
  --forest: #2f5d46;
  --deep-forest: #213d31;
  --moss: #6f8f5f;
  --sage: #dce5d3;
  --sand: #f1eadc;
  --stone: #67706a;
  --clay: #b36b45;
  --paper: #fffaf0;
  --ink: #26312b;
  --shadow: 0 18px 45px rgba(35, 49, 42, 0.14);
  --soft-shadow: 0 8px 24px rgba(35, 49, 42, 0.11);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
  background:
    linear-gradient(120deg, rgba(47, 93, 70, 0.08), transparent 35%),
    linear-gradient(250deg, rgba(179, 107, 69, 0.09), transparent 34%),
    #e6e1d5;
}

body.modal-open {
  overflow: hidden;
}

a {
  color: inherit;
}

.hero {
  min-height: 54vh;
  display: grid;
  grid-template-rows: auto 1fr;
  padding: 22px clamp(16px, 4vw, 48px) 42px;
  color: #f9f6ed;
  background:
    linear-gradient(rgba(25, 45, 36, 0.82), rgba(25, 45, 36, 0.68)),
    linear-gradient(135deg, #2f5d46 0%, #566f5b 48%, #8f765c 100%);
  border-bottom: 8px solid rgba(47, 93, 70, 0.35);
}

.top-nav {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.top-nav a {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 8px 13px;
  border: 1px solid rgba(255, 250, 240, 0.34);
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.92rem;
  background: rgba(255, 250, 240, 0.12);
  transition: background 180ms ease, transform 180ms ease;
}

.top-nav a:hover,
.top-nav a.is-active {
  background: rgba(255, 250, 240, 0.25);
  transform: translateY(-1px);
}

.hero-content {
  width: min(980px, 100%);
  place-self: center;
  text-align: center;
  padding: 46px 0 12px;
  animation: riseIn 760ms ease backwards;
}

.eyebrow,
.section-label {
  margin: 0 0 10px;
  color: var(--clay);
  font-size: 0.77rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #d8c49b;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  max-width: 880px;
  margin-inline: auto;
  margin-bottom: 16px;
  font-size: clamp(2.2rem, 7vw, 5.3rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.subtitle {
  max-width: 720px;
  margin: 0 auto;
  color: #ece6d7;
  font-size: clamp(1.05rem, 2vw, 1.45rem);
}

.board {
  width: min(1480px, calc(100% - 28px));
  margin: -34px auto 30px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr) minmax(0, 1fr);
  gap: 0;
  border: 1px solid rgba(47, 93, 70, 0.2);
  border-radius: 22px;
  background: var(--paper);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: boardFloat 800ms 120ms ease backwards;
}

.fold {
  display: grid;
  align-content: start;
  gap: 18px;
  padding: clamp(18px, 2.8vw, 30px);
}

.fold-center {
  background: #f7f2e8;
  border-inline: 1px dashed rgba(47, 93, 70, 0.28);
}

.panel-card,
.visual-card {
  border: 1px solid rgba(47, 93, 70, 0.15);
  border-radius: var(--radius);
  background: rgba(255, 252, 245, 0.94);
  box-shadow: var(--soft-shadow);
  animation: riseIn 650ms ease backwards;
  transition: border-color 220ms ease, box-shadow 220ms ease, transform 220ms ease;
}

.panel-card:hover {
  border-color: rgba(47, 93, 70, 0.28);
  box-shadow: 0 12px 30px rgba(35, 49, 42, 0.13);
}

.panel-card {
  padding: clamp(18px, 2.3vw, 26px);
}

.feature-card {
  background:
    linear-gradient(180deg, rgba(220, 229, 211, 0.68), rgba(255, 252, 245, 0.96));
}

h2 {
  margin-bottom: 12px;
  color: var(--deep-forest);
  font-size: clamp(1.28rem, 2vw, 1.72rem);
  line-height: 1.15;
  letter-spacing: 0;
}

.panel-card p:last-child,
.panel-card ul:last-child {
  margin-bottom: 0;
}

.check-list,
.metric-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  padding-left: 18px;
  border-left: 4px solid var(--moss);
}

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

.visual-card {
  margin: 0;
  overflow: hidden;
  background: #fffdf7;
  cursor: zoom-in;
  outline: 0;
}

.visual-card:hover,
.visual-card:focus-visible {
  border-color: rgba(47, 93, 70, 0.45);
  box-shadow: 0 18px 38px rgba(35, 49, 42, 0.2);
  transform: translateY(-5px) scale(1.015);
}

.visual-card:focus-visible {
  box-shadow: 0 0 0 4px rgba(179, 107, 69, 0.28), 0 18px 38px rgba(35, 49, 42, 0.2);
}

.image-placeholder {
  min-height: 178px;
  position: relative;
  overflow: hidden;
  background-color: var(--sage);
  transition: filter 220ms ease, transform 300ms ease;
}

.visual-card:hover .image-placeholder,
.visual-card:focus-visible .image-placeholder {
  filter: saturate(1.08) contrast(1.03);
  transform: scale(1.02);
}

.image-placeholder::before {
  content: "";
  position: absolute;
  inset: 16px;
  border: 2px dashed rgba(47, 93, 70, 0.42);
  border-radius: 12px;
}

.graph-lines {
  background:
    linear-gradient(135deg, transparent 40%, rgba(179, 107, 69, 0.72) 41%, rgba(179, 107, 69, 0.72) 43%, transparent 44%),
    linear-gradient(160deg, transparent 49%, rgba(47, 93, 70, 0.66) 50%, rgba(47, 93, 70, 0.66) 52%, transparent 53%),
    repeating-linear-gradient(0deg, rgba(47, 93, 70, 0.11) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(90deg, rgba(47, 93, 70, 0.11) 0 1px, transparent 1px 44px),
    #e8efdf;
}

.density-bars {
  background:
    linear-gradient(to top, rgba(47, 93, 70, 0.72) 0 58%, transparent 58%) 22% 68% / 18% 64% no-repeat,
    linear-gradient(to top, rgba(179, 107, 69, 0.72) 0 35%, transparent 35%) 52% 68% / 18% 64% no-repeat,
    linear-gradient(to top, rgba(103, 112, 106, 0.58) 0 76%, transparent 76%) 80% 68% / 18% 64% no-repeat,
    repeating-linear-gradient(0deg, rgba(47, 93, 70, 0.12) 0 1px, transparent 1px 32px),
    #e8efdf;
}

.food-web {
  background:
    radial-gradient(circle at 50% 25%, rgba(47, 93, 70, 0.78) 0 18px, transparent 19px),
    radial-gradient(circle at 25% 70%, rgba(111, 143, 95, 0.82) 0 20px, transparent 21px),
    radial-gradient(circle at 75% 70%, rgba(179, 107, 69, 0.78) 0 20px, transparent 21px),
    linear-gradient(28deg, transparent 49%, rgba(47, 93, 70, 0.38) 50%, transparent 51%),
    linear-gradient(152deg, transparent 49%, rgba(47, 93, 70, 0.38) 50%, transparent 51%),
    #e8efdf;
}

.city-layout {
  background:
    linear-gradient(90deg, transparent 45%, rgba(47, 93, 70, 0.55) 45% 56%, transparent 56%),
    linear-gradient(0deg, transparent 46%, rgba(47, 93, 70, 0.55) 46% 58%, transparent 58%),
    linear-gradient(35deg, transparent 43%, rgba(179, 107, 69, 0.5) 43% 50%, transparent 50%),
    repeating-linear-gradient(90deg, rgba(103, 112, 106, 0.18) 0 28px, transparent 28px 48px),
    #e8efdf;
}

.visual-card figcaption {
  padding: 12px 14px 14px;
  color: var(--deep-forest);
  font-weight: 800;
  text-align: center;
}

.visual-card img {
  display: block;
  width: 100%;
  min-height: 178px;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: var(--sage);
}

.timeline {
  position: relative;
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline li {
  position: relative;
  padding: 16px 16px 16px 18px;
  border-left: 5px solid var(--forest);
  border-radius: 12px;
  background: #fffdf7;
  transition: transform 220ms ease, box-shadow 220ms ease;
}

.timeline li:hover {
  box-shadow: 0 10px 20px rgba(35, 49, 42, 0.1);
  transform: translateX(4px);
}

.timeline li:nth-child(even) {
  border-left-color: var(--clay);
}

.timeline strong {
  display: block;
  margin: 7px 0;
  color: var(--deep-forest);
}

.timeline p {
  margin-bottom: 0;
}

.phase {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  color: #fffdf7;
  font-size: 0.82rem;
  font-weight: 800;
  background: var(--forest);
}

.cost-grid {
  display: grid;
  gap: 10px;
  margin-bottom: 16px;
}

.cost-grid div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px;
  border-radius: 12px;
  background: #f7f2e8;
}

.cost-name {
  font-weight: 800;
}

.cost-level {
  flex: 0 0 auto;
  padding: 4px 9px;
  border-radius: 999px;
  color: #fffdf7;
  font-size: 0.78rem;
  font-weight: 800;
}

.high {
  background: #8f4e38;
}

.medium-high {
  background: #9d7140;
}

.medium {
  background: #687d4d;
}

.ongoing {
  background: var(--stone);
}

.metric-list li {
  padding: 14px;
  border-radius: 12px;
  background: #f7f2e8;
}

.metric-list span {
  display: block;
  margin-bottom: 4px;
  color: var(--deep-forest);
  font-weight: 800;
}

.metric-list p {
  margin-bottom: 0;
}

.risk-list {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 16px;
}

.risk-list span {
  padding: 8px 11px;
  border: 1px solid rgba(47, 93, 70, 0.22);
  border-radius: 999px;
  color: var(--deep-forest);
  font-weight: 800;
  background: var(--sage);
}

.sources,
.site-footer {
  width: min(1120px, calc(100% - 32px));
}

.sources {
  margin: 0 auto 14px;
  color: #3a453f;
  font-size: 0.92rem;
  text-align: center;
}

.site-footer {
  margin: 0 auto 36px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  color: #3a453f;
  font-size: 0.94rem;
}

.site-footer p {
  margin-bottom: 0;
}

.site-footer a {
  flex: 0 0 auto;
  color: var(--deep-forest);
  font-weight: 800;
}

.github-link {
  margin-left: 6px;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.github-link:hover,
.github-link:focus-visible {
  color: var(--clay);
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: clamp(18px, 4vw, 42px);
  background: rgba(22, 33, 27, 0);
  opacity: 0;
  pointer-events: none;
  transition: background 260ms ease, opacity 260ms ease;
}

.lightbox.is-open {
  background: rgba(22, 33, 27, 0.72);
  opacity: 1;
  pointer-events: auto;
}

.lightbox.is-closing {
  background: rgba(22, 33, 27, 0);
  opacity: 0;
}

.lightbox-panel {
  width: min(960px, 100%);
  position: relative;
  padding: clamp(14px, 2vw, 22px);
  border: 1px solid rgba(255, 250, 240, 0.5);
  border-radius: 24px;
  background: #fffdf7;
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.35);
  transform: translateY(24px) scale(0.9);
  transition: transform 320ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.lightbox.is-open .lightbox-panel {
  transform: translateY(0) scale(1);
}

.lightbox.is-closing .lightbox-panel {
  transform: translateY(20px) scale(0.94);
}

.lightbox-close {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  color: #fffdf7;
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
  background: var(--deep-forest);
  box-shadow: 0 8px 20px rgba(35, 49, 42, 0.26);
  transition: background 180ms ease, transform 180ms ease;
}

.lightbox-close:hover,
.lightbox-close:focus-visible {
  background: var(--clay);
  transform: rotate(5deg) scale(1.05);
}

.lightbox-visual {
  overflow: hidden;
  border-radius: 18px;
  background: var(--sage);
}

.lightbox-visual img,
.lightbox-visual .image-placeholder {
  display: block;
  width: 100%;
  min-height: min(68vh, 620px);
  max-height: 72vh;
  aspect-ratio: 16 / 10;
  object-fit: contain;
}

.lightbox-visual .image-placeholder::before {
  inset: clamp(18px, 5vw, 48px);
}

.lightbox-caption {
  margin: 14px 8px 2px;
  color: var(--deep-forest);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 800;
  text-align: center;
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes boardFloat {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.985);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 1120px) {
  .board {
    grid-template-columns: 1fr;
    overflow: visible;
  }

  .fold-center {
    border-block: 1px dashed rgba(47, 93, 70, 0.28);
    border-inline: 0;
  }
}

@media (max-width: 680px) {
  .hero {
    min-height: 62vh;
    padding-inline: 14px;
  }

  .top-nav {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 4px;
  }

  .top-nav a {
    white-space: nowrap;
  }

  .board {
    width: calc(100% - 18px);
    margin-top: -26px;
    border-radius: 18px;
  }

  .visual-grid {
    grid-template-columns: 1fr;
  }

  .image-placeholder {
    min-height: 190px;
  }

  .visual-card img {
    min-height: 190px;
  }

  .cost-grid div,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition: none !important;
  }
}