:root {
  --bg: #faf8f1;
  --ink: #3b3b3b;
  --muted: #555;
  --blue: #1688e8;
  --line: #dad6cc;
  --code: #f3f0e8;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  border-top: 8px solid #333;
  background: var(--bg);
  color: var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.48;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

main {
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: 0 22px;
}

.hero {
  max-width: 1040px;
  margin: 0 auto;
  padding: 48px 0 28px;
  text-align: center;
}

h1 {
  max-width: 960px;
  margin: 0 auto 18px;
  color: #383838;
  font-size: clamp(2rem, 4.2vw, 3.2rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 22px;
  color: #3c3c3c;
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  font-weight: 700;
  line-height: 1.18;
  text-align: center;
}

h3 {
  margin: 0 0 8px;
  color: #333;
  font-size: 1.35rem;
  font-weight: 700;
}

p {
  margin: 0 0 14px;
}

sup {
  font-size: 0.68em;
  line-height: 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 18px;
  align-items: center;
  margin: 0 auto;
  font-size: 1.08rem;
  font-weight: 700;
}

.actions a {
  color: #111;
}

.actions a:hover {
  color: var(--blue);
}

.actions span {
  width: 1px;
  height: 18px;
  background: #c9c4bc;
}

.narrow {
  max-width: 860px;
  margin: 0 auto;
}

.contents {
  padding: 16px 0 22px;
  text-align: left;
}

.contents h2 {
  margin-bottom: 8px;
  font-size: 1.15rem;
  text-align: left;
}

.contents ul {
  margin: 0;
  padding-left: 28px;
  color: var(--blue);
}

.section {
  padding: 28px 0 34px;
}

.section p {
  color: var(--muted);
  text-align: justify;
}

.section-heading {
  max-width: 900px;
  margin: 0 auto 18px;
}

.section-heading p {
  text-align: center;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
}

.method-grid article {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.method-grid span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-bottom: 10px;
  border: 1px solid #bfb8ad;
  border-radius: 50%;
  color: #333;
  font-size: 0.8rem;
  font-weight: 700;
}

.method-grid p {
  font-size: 0.98rem;
  text-align: left;
}

.figure-section {
  width: min(100%, 860px);
  margin: 0 auto;
}

figure {
  margin: 0 auto;
  text-align: center;
}

figure img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

.pipeline-figure {
  width: min(100%, 860px);
  margin: 0 auto;
}

.figure-summary {
  max-width: 900px;
  margin: 18px auto 0;
  color: var(--muted);
  text-align: justify;
}

.video-section {
  width: min(120%, calc((100vw - 44px) * 0.8), 1344px);
  margin: 0 0 0 50%;
  transform: translateX(-50%);
}

.robot-section {
  background: transparent;
}

.video-entry {
  margin: 0 auto 42px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.video-copy {
  margin-bottom: 12px;
  text-align: center;
}

.video-copy p {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}

video {
  display: block;
  width: 100%;
  aspect-ratio: 64 / 9;
  border: 1px solid #cfc9bd;
  border-radius: 3px;
  background: #111;
  object-fit: contain;
}

.action-entry {
  margin-top: 58px;
}

.action-video {
  aspect-ratio: 16 / 9;
}

.footer {
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: 28px 22px 38px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
  text-align: center;
}

.footer p {
  margin: 0 0 8px;
}

@media (max-width: 800px) {
  body {
    font-size: 16px;
  }

  main,
  .footer {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero {
    padding-top: 34px;
  }

  .actions span {
    display: none;
  }

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

  video {
    min-height: 96px;
  }
}