:root {
  --paper: #f7f6f3;
  --surface: #fbfbfa;
  --ink: #171717;
  --muted: #787774;
  --line: #d8d6d1;
  --line-light: #eae8e3;
  --blue: #2454e6;
  --blue-deep: #173aa7;
  --pale-blue: #e1ecff;
  --pale-green: #e8f1e7;
  --pad: clamp(20px, 4.3vw, 72px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "SF Pro Display", "Helvetica Neue", Helvetica,
    "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button,
a {
  color: inherit;
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

.site-shell {
  min-height: 100svh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.site-header {
  min-height: 76px;
  padding: 0 var(--pad);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--ink);
}

.brand {
  width: max-content;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.05em;
  text-decoration: none;
}

.brand-mark {
  width: 12px;
  height: 12px;
  background: var(--blue);
  transform: rotate(45deg);
}

.header-label,
.header-index,
.eyebrow,
.aside-meta,
.catalog-kicker,
.section-title,
.number,
.type,
.open-project,
footer {
  font-family: "SF Mono", "JetBrains Mono", "Hiragino Kaku Gothic ProN",
    monospace;
}

.header-label,
.header-index {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.header-label {
  justify-self: center;
}

.header-index {
  justify-self: end;
}

main {
  padding: 0 var(--pad);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.9fr) minmax(270px, 0.7fr);
  gap: clamp(36px, 6vw, 96px);
  padding: clamp(64px, 8vw, 124px) 0 clamp(72px, 8vw, 116px);
  border-bottom: 1px solid var(--ink);
  overflow: hidden;
}

.hero-copy,
.hero-aside {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 24px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1 {
  max-width: 1080px;
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, "Hiragino Kaku Gothic ProN",
    "Yu Gothic", sans-serif;
  font-size: clamp(54px, 6.8vw, 106px);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.07em;
  text-wrap: balance;
}

.hero-aside {
  align-self: end;
  display: grid;
  grid-template-columns: 8px 1fr;
  gap: 24px;
  padding-bottom: 5px;
}

.vertical-rule {
  min-height: 122px;
  background: var(--blue);
}

.intro {
  max-width: 390px;
  margin: 0 0 28px;
  font-size: clamp(16px, 1.25vw, 20px);
  font-weight: 500;
  line-height: 1.65;
}

.aside-meta {
  margin: 0;
  color: var(--muted);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.hero-watermark {
  position: absolute;
  right: -0.04em;
  bottom: -0.25em;
  color: rgba(23, 23, 23, 0.035);
  font-family: "Helvetica Neue", Helvetica, sans-serif;
  font-size: clamp(190px, 26vw, 420px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.09em;
  pointer-events: none;
  user-select: none;
}

.catalog {
  padding: clamp(38px, 5vw, 72px) 0 clamp(76px, 9vw, 136px);
}

.catalog-bar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 32px;
}

.catalog-kicker {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-title {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.section-title::before {
  content: "";
  width: 7px;
  height: 7px;
  display: inline-block;
  margin-right: 10px;
  background: var(--blue);
  transform: translateY(-1px);
}

.section-title span {
  margin-left: 10px;
  color: var(--blue);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.filter {
  min-height: 38px;
  padding: 8px 16px;
  border: 1px solid var(--ink);
  border-radius: 5px;
  background: transparent;
  font-size: 13px;
  font-weight: 650;
  cursor: pointer;
  transition: color 180ms ease, background-color 180ms ease,
    transform 180ms ease;
}

.filter:hover {
  background: var(--surface);
}

.filter:active {
  transform: scale(0.98);
}

.filter[aria-pressed="true"] {
  color: #fff;
  background: var(--ink);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--ink);
}

.project-card {
  position: relative;
  min-height: 344px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 34px;
  padding: clamp(24px, 2.4vw, 40px);
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  background: rgba(255, 255, 255, 0.14);
  overflow: hidden;
  transition: background-color 200ms ease, box-shadow 200ms ease,
    transform 200ms ease;
}

.project-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 6px;
  background: var(--blue);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 240ms cubic-bezier(0.16, 1, 0.3, 1);
}

.project-card:hover,
.project-card:focus-within {
  z-index: 1;
  background: var(--surface);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.project-card:hover::before,
.project-card:focus-within::before {
  transform: scaleY(1);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.number {
  color: var(--blue);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.type {
  padding: 5px 9px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.type-tool {
  color: #346538;
  background: var(--pale-green);
}

.type-game {
  color: var(--blue-deep);
  background: var(--pale-blue);
}

.card-copy {
  align-self: end;
}

.project-card h3 {
  margin: 0 0 18px;
  font-size: clamp(30px, 2.5vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.055em;
}

.description {
  margin: 0 0 9px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 550;
  line-height: 1.55;
}

.detail {
  max-width: 34ch;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}

.open-project {
  width: 100%;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0;
  border: 0;
  border-top: 1px solid var(--line-light);
  background: transparent;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  text-decoration: none;
}

.arrow {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  font-family: "Helvetica Neue", Helvetica, sans-serif;
  font-size: 18px;
  transition: color 180ms ease, background-color 180ms ease,
    transform 180ms ease;
}

.open-project:hover .arrow,
.open-project:focus-visible .arrow {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
  transform: rotate(-35deg);
}

.filter:focus-visible,
.open-project:focus-visible,
.brand:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 4px;
}

.catalog-notice {
  max-width: 680px;
  min-height: 1.7em;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

footer {
  min-height: 80px;
  padding: 0 var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--ink);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

footer span:last-child {
  color: var(--muted);
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: var(--delay, 0ms);
}

@media (max-width: 1040px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-aside {
    max-width: 540px;
  }

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

@media (max-width: 680px) {
  .site-header {
    min-height: 66px;
    grid-template-columns: 1fr auto;
  }

  .header-label {
    display: none;
  }

  .header-index {
    font-size: 9px;
  }

  .hero {
    gap: 42px;
    padding: 52px 0 58px;
  }

  h1 {
    font-size: clamp(48px, 14vw, 70px);
    line-height: 1.02;
  }

  .hero-aside {
    grid-template-columns: 6px 1fr;
    gap: 17px;
  }

  .vertical-rule {
    min-height: 100px;
  }

  .catalog-bar {
    align-items: flex-start;
    flex-direction: column;
  }

  .filters {
    justify-content: flex-start;
  }

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

  .project-card {
    min-height: 300px;
  }

  footer {
    min-height: 76px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}