:root {
  color-scheme: light;
  --paper: #f3efe6;
  --ink: #181a17;
  --muted: #66665e;
  --line: rgba(24, 26, 23, 0.18);
  --acid: #dfff45;
  --orange: #ff6339;
  --purple: #8e78ff;
  --blue: #52a8ff;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Noto Sans JP", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px),
    var(--paper);
  background-size: 80px 80px;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: #fff;
  background: var(--ink);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header,
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px clamp(24px, 5vw, 72px);
}

.site-header {
  min-height: 88px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.08rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.brand-mark {
  width: 20px;
  height: 20px;
  border: 5px solid var(--ink);
  border-right-color: var(--acid);
  border-radius: 50%;
  transform: rotate(-35deg);
}

.header-note,
.site-footer {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(360px, 0.8fr);
  min-height: calc(100svh - 88px);
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(72px, 11vw, 150px) clamp(24px, 7vw, 112px);
}

.eyebrow {
  margin: 0 0 28px;
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1 {
  max-width: 860px;
  margin: 0;
  font-size: clamp(3.5rem, 8.3vw, 8.8rem);
  font-weight: 880;
  line-height: 0.9;
  letter-spacing: -0.085em;
}

h1 span {
  position: relative;
  z-index: 0;
  white-space: nowrap;
}

h1 span::after {
  position: absolute;
  z-index: -1;
  right: -0.05em;
  bottom: 0.03em;
  left: 0.02em;
  height: 0.22em;
  background: var(--acid);
  content: "";
  transform: rotate(-1deg);
}

.lead {
  margin: 40px 0 0;
  color: #3e403a;
  font-size: clamp(1rem, 1.45vw, 1.3rem);
  font-weight: 560;
  line-height: 1.95;
}

.price-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 250px));
  margin: 42px 0 0;
  padding: 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.price-list div {
  padding: 16px 20px 18px 0;
}

.price-list div + div {
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.price-list dt {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.price-list dd {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin: 0;
}

.price-list strong {
  font-size: clamp(2rem, 3.2vw, 3.2rem);
  line-height: 1;
  letter-spacing: -0.06em;
}

.price-list span {
  font-size: 0.78rem;
  font-weight: 750;
}

.loom-graphic {
  position: relative;
  min-height: 560px;
  overflow: hidden;
  border-left: 1px solid var(--line);
  background: var(--ink);
  isolation: isolate;
}

.loom-graphic::before {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: repeating-linear-gradient(
    90deg,
    transparent 0 38px,
    rgba(255, 255, 255, 0.08) 38px 39px
  );
  content: "";
}

.thread {
  position: absolute;
  left: -25%;
  width: 150%;
  height: clamp(70px, 11vw, 150px);
  border-radius: 999px;
  transform: rotate(-13deg);
}

.thread-a {
  top: 8%;
  background: var(--acid);
}

.thread-b {
  top: 33%;
  background: var(--orange);
  transform: rotate(14deg);
}

.thread-c {
  top: 56%;
  background: var(--purple);
}

.thread-d {
  top: 78%;
  background: var(--blue);
  transform: rotate(12deg);
}

.graphic-label {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  min-width: 180px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  background: rgba(24, 26, 23, 0.88);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.3);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.2em;
  text-align: center;
  text-transform: uppercase;
  transform: translate(-50%, -50%) rotate(-4deg);
  backdrop-filter: blur(12px);
}

.graphic-label span {
  padding: 14px 30px;
}

.graphic-label span + span {
  border-top: 1px solid rgba(255, 255, 255, 0.3);
}

.principles {
  padding: clamp(76px, 10vw, 140px) clamp(24px, 7vw, 112px);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(160px, 0.4fr) 1fr;
  align-items: end;
  margin-bottom: 70px;
}

.section-heading .eyebrow {
  margin: 0 0 10px;
}

h2 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 5.4rem);
  font-weight: 850;
  line-height: 1;
  letter-spacing: -0.07em;
}

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

.principle-grid article {
  min-height: 310px;
  padding: 26px clamp(18px, 3vw, 42px) 32px 0;
}

.principle-grid article + article {
  padding-left: clamp(18px, 3vw, 42px);
  border-left: 1px solid var(--line);
}

.number {
  margin: 0 0 70px;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

h3 {
  margin: 0 0 18px;
  font-size: clamp(1.9rem, 3vw, 3.3rem);
  line-height: 1;
  letter-spacing: -0.06em;
}

.principle-grid article > p:last-child {
  max-width: 32ch;
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.8;
}

.site-footer {
  min-height: 116px;
  border-top: 1px solid var(--line);
}

.footer-brand {
  color: var(--ink);
  font-size: 1rem;
  letter-spacing: -0.04em;
  text-transform: none;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 900px) {
  body {
    background-size: 56px 56px;
  }

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

  .hero-copy {
    min-height: calc(100svh - 88px);
  }

  .loom-graphic {
    min-height: 68svh;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 640px) {
  .site-header,
  .site-footer {
    padding-right: 20px;
    padding-left: 20px;
  }

  .header-note {
    font-size: 0.64rem;
  }

  .hero-copy {
    min-height: 690px;
    padding-right: 20px;
    padding-left: 20px;
  }

  h1 {
    font-size: clamp(3.2rem, 17vw, 5rem);
  }

  .desktop-break {
    display: none;
  }

  .price-list {
    grid-template-columns: 1fr 1fr;
  }

  .price-list div {
    padding-right: 10px;
  }

  .price-list div + div {
    padding-left: 14px;
  }

  .principles {
    padding-right: 20px;
    padding-left: 20px;
  }

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

  .principle-grid article {
    min-height: 0;
    padding: 24px 0 38px;
  }

  .principle-grid article + article {
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .number {
    margin-bottom: 42px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
  }
}

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