:root {
  color: #111;
  background: #fff;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Helvetica Neue", sans-serif;
  font-feature-settings: "palt" 1;
  line-height: 1.9;
  font-weight: 400;
  font-size: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: #fff;
}

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

:is(.site-nav, .site-footer) a:is(:hover, :focus-visible, :active),
.preview-title:is(:hover, :focus-visible, :active),
.inline-preview-content a:is(:hover, :focus-visible, :active) {
  font-style: italic;
}

:is(.site-nav, .site-footer) a:focus-visible {
  outline: 1px solid #111;
  outline-offset: 4px;
}

.site-shell {
  width: min(920px, calc(100% - 128px));
  margin: 0 auto;
  padding: 48px 0 42px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 32px;
  padding: 0 8px 34px;
}

.site-name,
.site-nav a,
.site-footer a {
  letter-spacing: 0.04em;
}

.site-name {
  font-size: 0.92rem;
  font-weight: 360;
}

.site-nav,
.site-footer nav {
  display: flex;
  align-items: center;
  gap: clamp(26px, 5vw, 66px);
  font-size: 0.84rem;
}

.site-nav a {
  position: relative;
  padding-bottom: 8px;
}

.hero {
  position: relative;
  z-index: 10;
  padding: clamp(28px, 5vw, 54px) 8px clamp(34px, 5vw, 58px);
}

.hero h1 {
  position: fixed;
  top: 50%;
  left: max(24px, calc((100vw - 920px) / 2 - 132px));
  z-index: 30;
  margin: 0;
  color: #e00092;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Helvetica Neue", sans-serif;
  font-size: clamp(0.92rem, 1.1vw, 1.06rem);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: 0.04em;
  transform: translateY(-50%);
  pointer-events: none;
}

.hero p {
  max-width: 680px;
  margin: 0;
  font-size: clamp(0.82rem, 1.05vw, 0.92rem);
  font-weight: 430;
  line-height: 2.15;
  letter-spacing: 0.03em;
}

.hero p + p {
  margin-top: 12px;
}

.tool-index {
  border-top: 1px solid #cbc8c1;
}

.tool-row {
  display: grid;
  grid-template-columns: 72px minmax(260px, 1fr) minmax(112px, 0.22fr) 28px;
  gap: 34px;
  align-items: center;
  min-height: 112px;
  padding: 24px 8px;
  transition: background-color 160ms ease;
}

.tool-item {
  border-bottom: 1px solid #cbc8c1;
}

.tool-row:focus-visible,
.inline-preview summary:focus-visible,
.preview-title:focus-visible,
.inline-preview-content a:focus-visible {
  outline: 1px solid #111;
  outline-offset: 4px;
}

.tool-row:active {
  background: #ededed;
}

.tool-arrow {
  transition: transform 160ms ease;
}

.tool-row:hover .tool-title,
.tool-row:focus-visible .tool-title {
  font-style: italic;
}

.tool-row:hover .tool-arrow,
.tool-row:focus-visible .tool-arrow {
  transform: translateX(3px);
}

.preview-column {
  display: none;
}

.inline-preview {
  padding: 0 8px 20px 114px;
}

.inline-preview summary {
  width: fit-content;
  padding: 8px 0;
  color: #555;
  font-size: 0.75rem;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.inline-preview[open] summary {
  color: #111;
  font-style: italic;
}

.inline-preview-content img {
  display: block;
  width: 100%;
  height: auto;
  margin: 12px 0 16px;
  border: 1px solid #e5e5e5;
}

.inline-preview-content a {
  display: inline-block;
  padding: 8px 0;
  font-size: 0.8rem;
}

@media (min-width: 1100px) and (hover: hover) and (pointer: fine) {
  .site-shell {
    width: min(1160px, calc(100% - 128px));
  }

  .hero h1 {
    position: static;
    transform: none;
    font-size: 1.06rem;
  }

  .index-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .tool-row {
    grid-template-columns: 32px minmax(0, 1fr) 18px;
    gap: 12px 20px;
    padding: 24px 8px;
  }

  .index-layout .tool-copy {
    padding-left: 20px;
  }

  .index-layout .tool-title {
    font-size: 1rem;
  }

  .index-layout .tool-meta {
    grid-column: 2;
    padding-left: 21px;
    font-size: 0.72rem;
    color: #555;
  }

  .index-layout .tool-meta small {
    display: inline;
    margin-right: 8px;
    color: inherit;
  }

  .tool-arrow {
    grid-column: 3;
    grid-row: 1 / 3;
  }

  .is-selected .tool-title {
    font-style: italic;
  }

  .inline-preview {
    display: none;
  }

  .preview-column {
    display: block;
    position: sticky;
    top: 48px;
    padding-top: 24px;
    min-width: 0;
  }

  .tool-preview {
    margin: 0;
  }

  .preview-link {
    display: block;
    border: 1px solid #e5e5e5;
  }

  .preview-image {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 1280 / 900;
    object-fit: contain;
  }

  .tool-preview figcaption {
    display: flex;
    align-items: baseline;
    gap: 18px;
    padding-top: 16px;
    font-size: 0.8rem;
  }

  .preview-number {
    color: #777;
    font-variant-numeric: tabular-nums;
  }

  .preview-title {
    padding: 6px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .tool-row, .tool-arrow { transition: none; }
}

@media (min-width: 821px) and (max-width: 1099px) {
  .hero h1 {
    position: static;
    transform: none;
  }
}

.tool-row:hover,
.tool-row:focus-visible {
  background: #f7f7f7;
}

.tool-number {
  align-self: stretch;
  display: flex;
  align-items: flex-start;
  padding-top: 2px;
  color: #777;
  font-family: inherit;
  font-size: 1.08rem;
  font-weight: 360;
  line-height: 1.2;
  letter-spacing: 0.04em;
}

.tool-copy {
  min-width: 0;
  padding-left: 34px;
  border-left: 1px solid #d7d4ce;
}

.tool-title {
  display: block;
  margin-bottom: 8px;
  font-size: clamp(0.9rem, 1.2vw, 1.04rem);
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.04em;
}

.tool-description {
  display: block;
  max-width: 540px;
  font-size: 0.78rem;
  font-weight: 430;
  line-height: 2;
  letter-spacing: 0.03em;
}

.tool-meta {
  display: grid;
  grid-template-columns: minmax(82px, 1fr);
  font-size: 0.82rem;
  font-weight: 360;
  line-height: 1.35;
}

.tool-meta small {
  display: block;
  margin-bottom: 5px;
  font-size: 0.64rem;
  font-weight: 430;
  color: #222;
  letter-spacing: 0.02em;
}

.tool-arrow {
  justify-self: end;
  font-size: 1.08rem;
  line-height: 1;
}

.about {
  padding: clamp(62px, 8vw, 92px) 8px clamp(54px, 7vw, 76px);
}

.about h2 {
  margin: 0 0 28px;
  font-size: 0.9rem;
  font-weight: 430;
  letter-spacing: 0.05em;
}

.about p {
  margin: 0;
  max-width: 760px;
  font-size: 0.78rem;
  line-height: 2.15;
  letter-spacing: 0.03em;
}

.about p + p {
  margin-top: 22px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  padding: 28px 8px 0;
  border-top: 1px solid #c8c5be;
  font-size: 0.8rem;
  font-weight: 430;
}

.site-footer p {
  margin: 0;
  line-height: 1.9;
}

.footer-name {
  margin-bottom: 6px !important;
  font-size: 0.88rem;
}

@media (max-width: 820px) {
  .inline-preview {
    padding: 0 0 20px 78px;
  }
  .site-shell {
    width: min(100% - 54px, 620px);
    padding-top: 24px;
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
    padding: 0 0 22px;
  }

  .site-nav,
  .site-footer nav {
    width: 100%;
    justify-content: space-between;
    gap: 18px;
    font-size: 0.78rem;
  }

  .hero {
    padding: 42px 0 48px;
  }

  .hero h1 {
    position: static;
    margin-bottom: 0;
    font-size: 1.06rem;
    transform: none;
  }

  .tool-row {
    grid-template-columns: 46px minmax(0, 1fr) 22px;
    gap: 16px;
    min-height: auto;
    padding: 24px 0;
  }

  .tool-number {
    font-size: 0.92rem;
  }

  .tool-copy {
    padding-left: 16px;
  }

  .tool-meta {
    grid-column: 2 / 3;
    grid-row: 2;
    grid-template-columns: max-content;
    padding-left: 20px;
    border-left: 1px solid #c6c2ba;
    font-size: 0.78rem;
  }

  .tool-arrow {
    grid-column: 3;
    grid-row: 1 / 3;
    align-self: center;
    font-size: 0.92rem;
  }

  .about {
    padding: 66px 0 58px;
  }

  .site-footer {
    flex-direction: column;
    padding: 28px 0 0;
  }
}

@media (max-width: 460px) {
  .inline-preview {
    padding-left: 0;
  }
  .site-shell {
    width: calc(100% - 46px);
  }

  .site-nav,
  .site-footer nav {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .hero h1 {
    font-size: 1rem;
  }

  .tool-row {
    grid-template-columns: 1fr 24px;
    gap: 14px;
  }

  .tool-number {
    grid-column: 1 / -1;
    padding: 0;
  }

  .tool-copy,
  .tool-meta {
    grid-column: 1;
    padding-left: 12px;
  }

  .tool-copy {
    display: contents;
    padding-left: 0;
    border-left: 0;
  }

  .tool-title,
  .tool-description,
  .tool-meta {
    border-left: 1px solid #c6c2ba;
    padding-left: 12px;
  }

  .tool-title {
    grid-column: 1;
    grid-row: 2;
  }

  .tool-meta {
    grid-row: 3;
    border-left: 1px solid #c6c2ba;
  }

  .tool-description {
    grid-column: 1;
    grid-row: 4;
  }

  .tool-arrow {
    grid-column: 2;
    grid-row: 2 / 5;
  }
}