:root {
  --ink: #16181d;
  --text: #454851;
  --muted: #555963;
  --line: #c4c8d0;
  --paper: #fbfbf9;
  --grid: #ecedef;
  --blue: #1466d6;
  --blue-ui: #1e7cf0;
  --red: #e82a2a;
  --red-dark: #791f1f;
  --yellow: #ffd60a;
  --shadow: rgba(22, 24, 29, 0.12);
  --sans: "IBM Plex Sans JP", system-ui, -apple-system, "Hiragino Sans", sans-serif;
  --mono: "IBM Plex Mono", "IBM Plex Sans JP", ui-monospace, Menlo, monospace;
  color-scheme: light;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 40px 40px;
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.7;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--blue-ui);
  outline-offset: 3px;
}

h1,
h2,
h3 {
  word-break: auto-phrase;
}

.wrap {
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: clamp(20px, 5.5vw, 80px);
}

.mono {
  font-family: var(--mono);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ---- ナビ ---- */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  font-size: 19px;
  font-weight: 700;
  text-decoration: none;
}

.brand img {
  width: 34px;
  height: 34px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.4vw, 36px);
  font-size: 14px;
  font-weight: 500;
}

.nav__links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  text-decoration: none;
}

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

.nav__links .lang {
  font-family: var(--mono);
  color: var(--muted);
}

.nav__links .btn-outline {
  padding: 0 20px;
  border: 1.5px solid var(--ink);
  border-radius: 6px;
  font-weight: 700;
}

.nav__links .btn-outline:hover {
  background: var(--ink);
  color: #fff;
}

/* ---- ボタン・小物 ---- */

.btn {
  display: inline-flex;
  align-items: center;
  min-height: 54px;
  padding: 0 32px;
  border-radius: 6px;
  background: var(--ink);
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
}

.btn:hover {
  background: #000;
}

.btn--lg {
  min-height: 58px;
  padding: 0 40px;
  font-size: 18px;
}

/* 配布前はボタンの形だけ見せて、押せないことを破線で示す */
.btn--soon,
.btn--soon:hover {
  background: transparent;
  color: var(--ink);
  border: 1.5px dashed var(--ink);
  cursor: default;
}

.cta__note {
  margin: 0;
  color: var(--muted);
}

.meta {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
}

.hl {
  margin: 0 -6px;
  padding: 0 6px;
  background: linear-gradient(transparent 58%, var(--yellow) 58% 92%, transparent 92%);
}

.mosaic-chip {
  display: inline-block;
  width: 96px;
  height: 24px;
  vertical-align: -5px;
  background-color: #b8bcc6;
  background-image:
    linear-gradient(90deg, rgba(22, 24, 29, 0.16) 0 25%, rgba(255, 255, 255, 0.22) 25% 50%, rgba(22, 24, 29, 0.05) 50% 75%, rgba(255, 255, 255, 0.08) 75% 100%),
    linear-gradient(0deg, rgba(22, 24, 29, 0.12) 0 50%, rgba(255, 255, 255, 0.18) 50% 100%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.2) 0 33.4%, rgba(22, 24, 29, 0.1) 33.4% 66.7%, transparent 66.7% 100%);
  background-size: 48px 24px, 24px 24px, 108px 12px;
}

.key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  padding: 0 7px;
  border: 1.5px solid var(--ink);
  border-radius: 6px;
  background: #fff;
  font-family: var(--mono);
  font-size: 13px;
}

/* ---- ファーストビュー ---- */

.hero {
  padding-bottom: 56px;
}

.hero__main {
  display: grid;
  gap: 40px;
  padding-top: 32px;
}

.hero__text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
  min-width: 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  margin: 0;
  padding: 0 14px;
  border: 1.5px solid var(--ink);
  border-radius: 4px;
  background: #fff;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.tag:hover {
  background: var(--ink);
  color: #fff;
}

.hero h1 {
  margin: 0;
  font-size: clamp(42px, 10.5vw, 86px);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.h1-bracket {
  margin-left: -0.42em;
}

.dict {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
}

.dict__word {
  font-weight: 500;
  color: var(--blue);
}

.hero__lead {
  max-width: 580px;
  margin: 0;
  font-size: 18px;
  line-height: 1.9;
  color: var(--text);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
}

/* 層の図 */

.stack {
  position: relative;
  width: 720px;
  max-width: 100%;
  height: 630px;
  margin: 0 auto;
}

.stack__svg {
  position: absolute;
  left: 0;
  top: 0;
  width: 545px;
  height: 630px;
}

.stack-guide {
  fill: none;
  stroke: #9aa0ab;
  stroke-width: 1px;
  stroke-dasharray: 4 3;
}

.sheet {
  fill: rgba(255, 255, 255, 0.5);
  stroke: var(--ink);
  stroke-width: 1.5px;
  vector-effect: non-scaling-stroke;
}

.sheet--outline {
  fill: none;
}

.sheet-shadow {
  fill: var(--shadow);
}

.stack__labels {
  margin: 0;
  padding: 0;
  list-style: none;
}

.stack__labels li {
  position: absolute;
  left: 556px;
  width: 164px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stack__labels li::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 23px;
  width: 24px;
  height: 1px;
  background: var(--ink);
}

.stack__labels li:nth-child(1) { top: 104px; }
.stack__labels li:nth-child(2) { top: 209px; }
.stack__labels li:nth-child(3) { top: 314px; }
.stack__labels li:nth-child(4) { top: 419px; }

.stack__labels b {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
}

.stack__labels span {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

/* 3つの柱 */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 48px;
  margin: 16px 0 0;
  padding: 26px 0 0;
  border-top: 1.5px solid var(--ink);
  list-style: none;
}

.pillars li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.stamp {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 3px solid #fff;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 0 1.5px var(--red-dark);
  color: #fff;
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 500;
}

.pillar__title {
  margin: 0 0 6px;
  font-size: 21px;
  line-height: 1.5;
  font-weight: 700;
}

.pillars p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

/* ---- 各段 ---- */

.section__inner {
  padding-block: 88px 96px;
  border-top: 1.5px solid var(--ink);
}

.eyebrow {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--blue);
}

.h-section {
  margin: 0;
  font-size: clamp(30px, 3.4vw, 48px);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px 48px;
}

.section__title {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.section__head .lead {
  max-width: 460px;
}

.split {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px 64px;
}

.split__text {
  flex: 1 1 420px;
  max-width: 660px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* できること */

.tools {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 32px 24px;
  margin: 48px 0 0;
  padding: 0;
  list-style: none;
}

/* 見本はアプリの画面からの切り出し(256×161 か 320×201。画像だけ 448×281) */
.tool__specimen {
  aspect-ratio: 320 / 201;
  overflow: hidden;
  border: 1.5px solid var(--ink);
  background: #fff;
}

.tool__specimen img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tool__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 12px;
}

.tool__name {
  font-size: 16px;
  font-weight: 700;
}

/* アプリのスクリーンショット */

.appshot {
  margin: 0;
}

.appshot img {
  display: block;
  max-width: none;
  height: auto;
}

/* 1044×741 の画像の中に、932×629 のウインドウ(左右 56・上 38・下 74 の余白) */
.appshot--small {
  flex: 0 1 620px;
  min-width: min(100%, 300px);
}

.appshot--small img {
  width: 112.02%;
  margin: -4.08% -6.01% -7.94%;
}

/* 画像を重ねる */

.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  font-weight: 500;
}

.pills li {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1.5px solid var(--ink);
  border-radius: 6px;
  background: #fff;
}

.points {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

/* 保存と書き出し */

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  margin-top: 44px;
}

.card {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 24px 32px;
  padding: 32px;
  border: 1.5px solid var(--ink);
  background: #fff;
  box-shadow: 8px 8px 0 var(--shadow);
}

.card__mini {
  flex: 0 0 200px;
  border: 1.5px solid var(--ink);
  font-size: 13px;
}

.mini__title {
  padding: 8px 12px;
  border-bottom: 1.5px solid var(--ink);
  background: #eef0f3;
  font-family: var(--mono);
  font-size: 12px;
}

.card__mini img {
  display: block;
  width: 100%;
  height: auto;
}

.card__body {
  flex: 1 1 240px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card__kicker {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--blue);
}

.card__title {
  margin: 0;
  font-size: 24px;
  line-height: 1.4;
  font-weight: 700;
}

.note {
  margin: 28px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

/* 撮る */

.keys {
  flex: none;
  display: flex;
  gap: clamp(8px, 1.6vw, 18px);
  max-width: 100%;
  padding-top: 56px;
}

.keycap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: clamp(60px, 17vw, 108px);
  aspect-ratio: 1;
  border: 1.5px solid var(--ink);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 7px 0 var(--ink);
  font-family: var(--mono);
  font-size: clamp(26px, 6vw, 42px);
}

.keycap--accent {
  background: var(--red);
  box-shadow: 0 7px 0 var(--red-dark);
  color: #fff;
  font-weight: 500;
}

/* Skitch を使っていた人へ */

.fine {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

.spec {
  flex: 0 1 520px;
  min-width: min(100%, 300px);
  margin: 0;
  padding-top: 34px;
  font-size: 15px;
}

.spec div {
  display: flex;
  gap: 16px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.spec div:first-child {
  border-top: 1.5px solid var(--ink);
}

.spec div:last-child {
  border-bottom: 1.5px solid var(--ink);
}

.spec dt {
  flex: 0 0 130px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.95;
  color: var(--muted);
}

.spec dd {
  margin: 0;
  font-weight: 500;
}

/* ダウンロード */

.cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  padding-block: 72px 96px;
  border-top: 1.5px solid var(--ink);
  text-align: center;
}

.cta .h-section {
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.25;
}

.cta .cta-row {
  justify-content: center;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
}

/* ---- 幅ごとの調整 ---- */

/* 2段組みにするのは、見出し2行目(約6.1文字分)が左の列に収まる幅から。735px は層の図 720px とスクロールバーの分 */
@media (min-width: 1360px) {
  .hero__main {
    grid-template-columns: minmax(0, 1fr) 720px;
    gap: 0;
    padding-top: 0;
  }

  .hero__text {
    padding-top: 54px;
  }

  .hero h1 {
    font-size: clamp(60px, calc((89vw - 735px) / 6.2), 86px);
  }

  .stack {
    margin-top: -6px;
  }
}

/* 絵と文が縦に並ぶ幅では、見出しを先に読ませる */
@media (max-width: 1240px) {
  .appshot--lead {
    order: 1;
  }
}

@media (max-width: 1100px) {
  .tools {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 1000px) {
  .cards {
    grid-template-columns: minmax(0, 1fr);
  }

  .keys,
  .spec {
    padding-top: 0;
  }
}

@media (max-width: 900px) {
  .nav__links a:not(.btn-outline, .lang) {
    display: none;
  }

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

@media (max-width: 760px) {
  .section__inner {
    padding-block: 56px 64px;
  }

  .tools {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px 16px;
  }

  .stack {
    width: 100%;
    height: auto;
  }

  .stack__svg {
    position: static;
    display: block;
    width: 100%;
    max-width: 545px;
    height: auto;
    margin-inline: auto;
  }

  .stack__labels {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 20px;
    margin-top: 12px;
  }

  .stack__labels li {
    position: static;
    width: auto;
    padding-left: 10px;
    border-left: 2px solid var(--ink);
  }

  .stack__labels li::before {
    content: none;
  }

  .card {
    padding: 20px;
  }
}

@media (max-width: 520px) {
  .tools {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero__lead {
    font-size: 16px;
  }

  .spec dt {
    flex-basis: 96px;
  }
}