:root {
  --ink: #111;
  --red: #ef171c;
  --line: 4px;
  --pad-x: clamp(20px, 3.4vw, 56px);
  --header-y: 24px;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: Helvetica, Arial, sans-serif;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 32px;
  padding: var(--header-y) var(--pad-x) 12px;
}

.wordmark {
  font-size: 14px;
  line-height: 1;
  letter-spacing: .02em;
  font-weight: 400;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: baseline;
  gap: clamp(20px, 2.5vw, 40px);
  margin-left: auto;
}

.nav a { font-size: 14px; }
.nav a:hover, .wordmark:hover { opacity: .55; }

.home-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(220px, 19vw, 310px);
  min-height: calc(100vh - 82px);
  margin: 0 var(--pad-x) var(--pad-x);
  border: var(--line) solid var(--red);
}

.main-field {
  position: relative;
  min-height: 720px;
  border-right: var(--line) solid var(--red);
  overflow: hidden;
}

.side-field {
  display: grid;
  grid-template-rows: .95fr 1.05fr;
}

.side-cell:first-child { border-bottom: var(--line) solid var(--red); }

.geometry {
  position: absolute;
  background: var(--red);
  transform-origin: left top;
}

.geometry-diagonal {
  top: 64px;
  left: 0;
  width: 364.6px;
  height: var(--line);
  transform: rotate(45deg);
  clip-path: polygon(0 0, calc(100% - var(--line)) 0, 100% 100%, var(--line) 100%);
  z-index: 0;
}

.geometry-vertical {
  top: 318px;
  left: 255px;
  width: var(--line);
  height: calc(100% - 318px);
  z-index: 1;
}

.geometry-horizontal {
  top: 318px;
  left: 255px;
  width: min(42vw, 510px);
  height: var(--line);
  z-index: 1;
}

.page {
  min-height: calc(100vh - 82px);
  margin: 0 var(--pad-x) var(--pad-x);
  border-top: var(--line) solid var(--red);
  padding: 42px 0 80px;
}

.page-title {
  margin: 0;
  font-size: clamp(28px, 5vw, 72px);
  line-height: .95;
  font-weight: 400;
  letter-spacing: -.035em;
}

.page-note {
  max-width: 38rem;
  margin-top: 28px;
  line-height: 1.45;
}

@media (max-width: 760px) {
  :root { --line: 3px; }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }

  .nav {
    width: 100%;
    gap: 14px 20px;
    flex-wrap: wrap;
  }

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

  .main-field {
    min-height: 68vh;
    border-right: 0;
    border-bottom: var(--line) solid var(--red);
  }

  .side-field {
    min-height: 260px;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr;
  }

  .side-cell:first-child {
    border-bottom: 0;
    border-right: var(--line) solid var(--red);
  }

  .geometry-diagonal {
    width: 263.2px;
    top: 48px;
  }

  .geometry-vertical,
  .geometry-horizontal {
    top: 232px;
    left: 184px;
  }

  .geometry-vertical { height: calc(100% - 232px); }
  .geometry-horizontal { width: 42vw; }
}