:root {
  --page-bg: #eeece5;
  --page-bg-deep: #d8d7d0;
  --ink: #20242a;
  --ink-soft: rgba(32, 36, 42, 0.66);
  --white-veil: rgba(255, 255, 255, 0.56);

  --green-main: #a8d9b5;
  --green-soft: #e6f4e9;
  --green-ink: #173429;

  --sand-main: #efd8a2;
  --sand-soft: #f8eed4;
  --sand-ink: #3d3020;

  --blue-main: #82a0dc;
  --blue-soft: #e5ebfa;
  --blue-ink: #192746;

  --page-max: 1120px;
  --side-space: clamp(24px, 6vw, 92px);
  --tap-size: 48px;

  --band-height: clamp(116px, 24vw, 210px);
  --panel-space: clamp(24px, 6vw, 72px);

  --shadow-band:
    0 22px 34px rgba(28, 31, 34, 0.18),
    0 42px 110px rgba(28, 31, 34, 0.16);

  --shadow-panel:
    0 18px 42px rgba(28, 31, 34, 0.12);
}

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

html {
  min-height: 100%;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100dvh;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.55;
  background:
    radial-gradient(circle at 84% 8%, rgba(255, 255, 255, 0.72), transparent 24rem),
    radial-gradient(circle at 8% 52%, rgba(255, 255, 255, 0.42), transparent 32rem),
    linear-gradient(180deg, var(--page-bg) 0%, var(--page-bg-deep) 100%);
}

a {
  color: inherit;
}

.site-hero,
.band-stage,
.site-footer {
  width: min(var(--page-max), calc(100% - (var(--side-space) * 2)));
  margin-inline: auto;
}

.site-hero {
  padding-block:
    calc(74px + env(safe-area-inset-top))
    clamp(44px, 10vw, 104px);
}

.site-hero__kicker {
  margin: 0 0 clamp(16px, 4vw, 24px);
  color: rgba(32, 36, 42, 0.54);
  font-size: clamp(0.72rem, 2.4vw, 0.88rem);
  font-weight: 760;
  letter-spacing: 0.28em;
}

.site-hero__title {
  max-width: 12ch;
  margin: 0;
  color: rgba(32, 36, 42, 0.9);
  font-size: clamp(3.6rem, 15vw, 9.2rem);
  font-weight: 860;
  line-height: 0.78;
  letter-spacing: -0.09em;
}

.site-hero__lead {
  max-width: 40rem;
  margin: clamp(24px, 5vw, 38px) 0 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 3.6vw, 1.34rem);
}

.band-stage {
  display: grid;
  gap: clamp(8px, 2vw, 20px);
  padding-block-end: clamp(72px, 12vw, 132px);
}

.category-band {
  position: relative;
  margin-block: clamp(-6px, -1vw, 0px);
  isolation: isolate;
}

.category-band__summary {
  position: relative;
  display: block;
  width: 100vw;
  min-height: var(--band-height);
  margin-inline-start: calc(50% - 50vw);
  list-style: none;
  cursor: pointer;
  filter: drop-shadow(var(--shadow-band));
  transition:
    filter 220ms ease,
    transform 220ms ease;
  -webkit-tap-highlight-color: transparent;
}

.category-band__summary::-webkit-details-marker {
  display: none;
}

.category-band__summary::marker {
  content: "";
  font-size: 0;
}

.category-band__summary:focus-visible {
  outline: 4px solid rgba(32, 36, 42, 0.22);
  outline-offset: 8px;
}

.category-band__ribbon {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: block;
  clip-path: polygon(0 24%, 100% 2%, 100% 78%, 0 100%);
  transition:
    filter 220ms ease,
    transform 220ms ease,
    clip-path 260ms ease;
}

.category-band:nth-of-type(even) .category-band__ribbon {
  clip-path: polygon(0 12%, 100% 0, 100% 88%, 0 100%);
}

.category-band--infovis .category-band__ribbon {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.48), transparent 48%),
    var(--green-main);
}

.category-band--process .category-band__ribbon {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.42), transparent 50%),
    var(--sand-main);
}

.category-band--future .category-band__ribbon {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.38), transparent 48%),
    var(--blue-main);
}

.category-band__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(42px, auto) 1fr;
  gap: clamp(16px, 5vw, 48px);
  align-content: center;
  width: min(var(--page-max), calc(100% - (var(--side-space) * 2)));
  min-height: var(--band-height);
  margin-inline: auto;
  padding-block:
    clamp(30px, 7vw, 64px)
    clamp(24px, 6vw, 52px);
}

.category-band__number {
  color: rgba(32, 36, 42, 0.5);
  font-size: clamp(0.9rem, 3vw, 1.15rem);
  font-weight: 820;
  letter-spacing: 0.24em;
}

.category-band__title {
  align-self: end;
  color: rgba(32, 36, 42, 0.9);
  font-size: clamp(2rem, 9vw, 6.2rem);
  font-weight: 880;
  line-height: 0.86;
  letter-spacing: -0.08em;
}

.category-band--infovis .category-band__title,
.category-band--infovis .category-band__number {
  color: var(--green-ink);
}

.category-band--process .category-band__title,
.category-band--process .category-band__number {
  color: var(--sand-ink);
}

.category-band--future .category-band__title,
.category-band--future .category-band__number {
  color: var(--blue-ink);
}

.category-band[open] .category-band__summary {
  filter:
    drop-shadow(0 14px 24px rgba(28, 31, 34, 0.12))
    drop-shadow(0 34px 74px rgba(28, 31, 34, 0.12));
}

.category-band[open] .category-band__ribbon {
  filter: brightness(1.02) saturate(0.94);
}

.category-band__panel {
  display: grid;
  grid-template-rows: 0fr;
  width: 100vw;
  margin-inline-start: calc(50% - 50vw);
  transition: grid-template-rows 360ms ease;
}

.category-band[open] .category-band__panel {
  grid-template-rows: 1fr;
}

.category-band__panel-crop {
  min-height: 0;
  overflow: hidden;
}

.category-band__panel-surface {
  margin-block-start: clamp(-22px, -3vw, -12px);
  padding-block:
    clamp(54px, 9vw, 96px)
    clamp(48px, 8vw, 86px);
  clip-path: polygon(0 7%, 100% 0, 100% 100%, 0 92%);
  box-shadow: var(--shadow-panel);
}

.category-band:nth-of-type(even) .category-band__panel-surface {
  clip-path: polygon(0 0, 100% 8%, 100% 92%, 0 100%);
}

.category-band--infovis .category-band__panel-surface {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.44), transparent 60%),
    var(--green-soft);
  color: var(--green-ink);
}

.category-band--process .category-band__panel-surface {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.38), transparent 60%),
    var(--sand-soft);
  color: var(--sand-ink);
}

.category-band--future .category-band__panel-surface {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.34), transparent 60%),
    var(--blue-soft);
  color: var(--blue-ink);
}

.category-band__panel-inner {
  width: min(var(--page-max), calc(100% - (var(--side-space) * 2)));
  margin-inline: auto;
}

.category-band__description {
  max-width: 44rem;
  margin: 0 0 clamp(26px, 5vw, 46px);
  color: rgba(32, 36, 42, 0.64);
  font-size: clamp(1rem, 3.2vw, 1.24rem);
}

.project-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.project-item {
  display: grid;
  grid-template-columns: minmax(5rem, 0.18fr) 1fr auto;
  gap: clamp(18px, 5vw, 44px);
  align-items: start;
  padding-block: clamp(24px, 6vw, 48px);
  border-top: 1px solid rgba(32, 36, 42, 0.18);
}

.project-item:last-child {
  border-bottom: 1px solid rgba(32, 36, 42, 0.18);
}

.project-item--empty {
  opacity: 0.72;
}

.project-item__meta {
  color: rgba(32, 36, 42, 0.52);
  font-size: clamp(0.72rem, 2.4vw, 0.86rem);
  font-weight: 820;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.project-item__title {
  margin: 0;
  font-size: clamp(1.7rem, 6vw, 3.6rem);
  font-weight: 860;
  line-height: 0.9;
  letter-spacing: -0.07em;
}

.project-item__text {
  max-width: 42rem;
  margin: clamp(14px, 3vw, 22px) 0 0;
  color: rgba(32, 36, 42, 0.64);
  font-size: clamp(0.98rem, 3vw, 1.14rem);
}

.project-item__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--tap-size);
  padding-inline: 18px;
  color: rgba(32, 36, 42, 0.82);
  font-size: 0.78rem;
  font-weight: 820;
  letter-spacing: 0.16em;
  text-decoration: none;
  text-transform: uppercase;
  border: 1px solid rgba(32, 36, 42, 0.34);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
  white-space: nowrap;
}

.project-item__link:focus-visible {
  outline: 4px solid rgba(32, 36, 42, 0.22);
  outline-offset: 5px;
}

.site-footer {
  width: min(var(--page-max), calc(100% - (var(--side-space) * 2)));
  padding-block:
    0
    calc(72px + env(safe-area-inset-bottom));
}

.site-footer p {
  max-width: 42rem;
  margin: 0;
  color: rgba(32, 36, 42, 0.56);
  font-size: clamp(0.9rem, 2.7vw, 1rem);
}

@media (hover: hover) {
  .category-band__summary:hover {
    transform: translateY(-2px);
    filter:
      drop-shadow(0 16px 30px rgba(28, 31, 34, 0.18))
      drop-shadow(0 42px 100px rgba(28, 31, 34, 0.14));
  }

  .category-band__summary:hover .category-band__ribbon {
    filter: brightness(1.04) saturate(0.96);
  }

  .project-item__link:hover {
    color: rgba(255, 255, 255, 0.92);
    background: rgba(32, 36, 42, 0.72);
  }
}

@media (max-width: 720px) {
  :root {
    --side-space: 24px;
    --band-height: clamp(126px, 34vw, 188px);
  }

  .site-hero {
    padding-block:
      calc(62px + env(safe-area-inset-top))
      clamp(38px, 10vw, 68px);
  }

  .site-hero__title {
    max-width: 8.5ch;
  }

  .category-band__inner {
    grid-template-columns: 1fr;
    gap: clamp(12px, 3.4vw, 18px);
    padding-block:
      clamp(32px, 8vw, 54px)
      clamp(30px, 7vw, 52px);
  }

  .category-band__number {
    align-self: start;
  }

  .category-band__title {
    align-self: start;
  }

  .project-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .project-item__link {
    width: fit-content;
    margin-block-start: 6px;
  }
}

@media (max-width: 420px) {
  :root {
    --side-space: 20px;
  }

  .site-hero__title {
    font-size: clamp(3.2rem, 16vw, 4.8rem);
  }

  .category-band__title {
    font-size: clamp(2.1rem, 10.5vw, 3.4rem);
  }
}

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