:root {
  --download-orange: #f47a24;
  --download-orange-dark: #d85d10;
  --download-orange-soft: #fff3e5;
  --download-green: #267a49;
  --download-green-dark: #1f5a33;
  --download-green-soft: #edf8f0;
  --download-ink: #3b2d23;
  --download-text: #5f5147;
  --download-muted: #88796d;
  --download-line: #ead9c8;
  --download-background: #fffaf4;
  --download-card: #ffffff;
  --download-danger: #a33a21;
  --download-danger-soft: #fff1ed;
  --download-shadow: 0 20px 50px rgba(105, 69, 37, 0.1);
  --download-container: 1120px;
}

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

[hidden] {
  display: none;
}

html {
  color: var(--download-text);
  background: var(--download-background);
  font-family: "Yu Gothic", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.75;
  scroll-behavior: smooth;
}

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

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

a {
  color: var(--download-orange-dark);
}

a:hover {
  color: #a64011;
}

a:focus-visible,
summary:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(244, 122, 36, 0.32);
  outline-offset: 3px;
}

h1,
h2,
h3,
p,
ol,
ul,
dl,
dd {
  margin-top: 0;
}

h1,
h2,
h3 {
  color: var(--download-ink);
  line-height: 1.4;
  text-wrap: pretty;
}

kbd {
  padding: 1px 6px;
  background: #fff;
  border: 1px solid var(--download-line);
  border-bottom-width: 2px;
  border-radius: 5px;
  font: inherit;
  font-size: 0.9em;
}

code {
  font-size: 0.92em;
  overflow-wrap: anywhere;
}

summary {
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

.download-skip {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 30;
  padding: 8px 14px;
  color: #fff;
  background: var(--download-ink);
  border-radius: 8px;
  transform: translateY(-150%);
}

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

.download-header {
  display: flex;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 10px max(18px, calc((100% - var(--download-container)) / 2));
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--download-line);
}

.download-header > span {
  color: var(--download-muted);
  font-size: 13px;
  font-weight: 800;
  text-align: right;
}

.download-brand {
  display: inline-flex;
  align-items: center;
}

.download-brand img {
  width: clamp(136px, 16vw, 158px);
}

/* 狭い画面：上部に固定する進捗バー */
.download-progress {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid var(--download-line);
  box-shadow: 0 4px 14px rgba(105, 69, 37, 0.06);
}

.download-progress__menu summary {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 32px;
  cursor: pointer;
}

.download-progress__menu summary b {
  color: var(--download-ink);
  font-size: 14px;
  white-space: nowrap;
}

.download-progress__label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  color: var(--download-text);
  font-size: 14px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.download-progress__toggle {
  color: var(--download-orange-dark);
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.download-progress__menu nav {
  max-height: 60vh;
  margin-top: 8px;
  padding-top: 8px;
  overflow-y: auto;
  border-top: 1px solid var(--download-line);
}

.download-progress__bar {
  height: 5px;
  margin-top: 8px;
  overflow: hidden;
  background: #f3e6d8;
  border-radius: 3px;
}

.download-progress__bar span {
  display: block;
  width: 14%;
  height: 100%;
  background: var(--download-orange);
  border-radius: 3px;
  transition: width 300ms ease;
}

/* 手順ナビ（上部バーの一覧と左側のナビで共通） */
.download-step-nav {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.download-step-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  color: var(--download-text);
  border-radius: 10px;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.download-step-nav a:hover {
  background: var(--download-orange-soft);
}

.download-step-nav__mark {
  display: grid;
  flex: 0 0 22px;
  height: 22px;
  color: #fff;
  background: #d8c9ba;
  border-radius: 50%;
  font-size: 12px;
  place-items: center;
}

.download-step-nav a.is-done {
  color: var(--download-green);
}

.download-step-nav a.is-done .download-step-nav__mark {
  background: #4caf72;
}

.download-step-nav a.is-current {
  color: #fff;
  background: var(--download-ink);
}

.download-step-nav a.is-current .download-step-nav__mark {
  color: var(--download-ink);
  background: #fff;
}

.download-main {
  width: min(100% - 32px, var(--download-container));
  margin-inline: auto;
  padding-block: clamp(24px, 4vw, 42px) 72px;
}

/* ヒーロー：手順1（準備）と手順2（ダウンロード） */
.download-hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 400px), 1fr));
  gap: clamp(22px, 3vw, 36px);
  padding: clamp(22px, 4vw, 42px);
  background: var(--download-card);
  border: 1px solid var(--download-line);
  border-radius: 22px;
  box-shadow: var(--download-shadow);
  scroll-margin-top: 80px;
}

.download-eyebrow {
  margin-bottom: 4px;
  color: var(--download-orange-dark);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.download-hero h1 {
  margin-bottom: 12px;
  font-size: clamp(30px, 4.6vw, 44px);
}

.download-lead {
  margin-bottom: 22px;
  font-size: 17px;
}

.download-step-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.download-step-heading > span {
  display: grid;
  flex: 0 0 32px;
  height: 32px;
  color: #fff;
  background: var(--download-orange);
  border-radius: 50%;
  font-weight: 900;
  place-items: center;
}

.download-step-heading h2 {
  margin: 0;
  font-size: 20px;
}

.download-check-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.download-check-list label {
  display: flex;
  gap: 12px;
  padding: 10px 12px;
  background: var(--download-green-soft);
  border-radius: 9px;
  cursor: pointer;
}

.download-check-list input {
  flex: none;
  width: 20px;
  height: 20px;
  margin: 3px 0 0;
  accent-color: var(--download-green);
}

.download-hero__note {
  margin: 12px 0 0;
  color: var(--download-muted);
  font-size: 14px;
}

.download-release-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-self: start;
  padding: clamp(18px, 3vw, 26px);
  background: var(--download-orange-soft);
  border: 1px solid #f3c89f;
  border-radius: 16px;
  scroll-margin-top: 80px;
}

.download-release-panel .download-step-heading {
  margin-bottom: 0;
}

.download-release {
  padding: 16px;
  background: #fff;
  border: 1px solid #f3c89f;
  border-radius: 12px;
}

.download-release h3 {
  margin-bottom: 8px;
  font-size: 16px;
}

.download-status {
  margin-bottom: 12px;
  color: var(--download-ink);
  font-weight: 700;
}

.download-status.is-ready {
  color: var(--download-green);
}

.download-status.is-unavailable {
  color: var(--download-danger);
}

.download-release__details {
  display: grid;
  gap: 8px 18px;
  margin: 0 0 12px;
  font-size: 14px;
}

.download-release__details[hidden] {
  display: none;
}

.download-release__details div,
.download-file-details dl div {
  display: grid;
  gap: 2px;
}

.download-release__details dt,
.download-file-details dt {
  color: var(--download-muted);
  font-weight: 700;
}

.download-release__details dd,
.download-file-details dd {
  margin: 0;
  color: var(--download-ink);
  font-weight: 800;
  overflow-wrap: anywhere;
}

.download-button {
  display: flex;
  width: 100%;
  min-height: 56px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  color: #fff;
  background: var(--download-orange);
  border: 2px solid var(--download-ink);
  border-radius: 12px;
  box-shadow: 3px 4px 0 var(--download-ink);
  font-size: 17px;
  font-weight: 900;
  text-align: center;
  text-decoration: none;
}

.download-button:hover {
  color: #fff;
  background: var(--download-orange-dark);
}

.download-button.is-disabled {
  color: #81756b;
  background: #e4ddd6;
  border-color: #b7aca2;
  box-shadow: none;
  cursor: not-allowed;
}

.download-release__hint {
  margin: 10px 0 0;
  color: var(--download-muted);
  font-size: 13px;
}

.download-warning,
.download-note {
  margin: 14px 0 0;
  padding: 12px 16px;
  background: var(--download-danger-soft);
  border-left: 5px solid var(--download-danger);
  border-radius: 9px;
  font-size: 15px;
}

.download-release-panel .download-warning {
  margin: 0;
}

.download-done {
  margin: 20px 0 0;
  padding: 12px 16px;
  color: var(--download-green-dark);
  background: var(--download-green-soft);
  border: 1.5px solid var(--download-green);
  border-radius: 10px;
  font-weight: 700;
}

.download-release-panel .download-done {
  margin: 0;
  padding: 10px 14px;
  font-size: 14px;
}

.download-muted {
  margin: 14px 0 0;
  color: var(--download-muted);
  font-size: 15px;
}

.download-warning-link {
  color: var(--download-danger);
  font-size: 14px;
  font-weight: 800;
}

/* 折りたたみ（＋/−は疑似要素で表示し、要約文には含めない） */
.download-help {
  padding-block: 14px;
  border-bottom: 1px solid var(--download-line);
}

.download-help > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--download-ink);
  font-weight: 700;
  cursor: pointer;
}

.download-help > summary::after,
.download-warnings > summary::after {
  flex: none;
  color: var(--download-orange-dark);
  content: "+";
  font-size: 20px;
  font-weight: 500;
  line-height: 1;
}

.download-help[open] > summary::after,
.download-warnings[open] > summary::after {
  content: "−";
}

.download-help > p,
.download-help > ol,
.download-help > ul,
.download-help > dl {
  margin-top: 12px;
  margin-bottom: 0;
}

.download-help li + li {
  margin-top: 10px;
}

.download-help--compact {
  margin-top: 8px;
  padding-bottom: 0;
  border-top: 1px solid var(--download-line);
  border-bottom: 0;
  font-size: 15px;
}

.download-release-panel .download-help {
  padding-block: 12px 0;
  border-top: 1px solid #f3c89f;
  border-bottom: 0;
  font-size: 14px;
}

.download-release-panel .download-help > summary {
  font-size: 15px;
}

.download-signing__label {
  color: var(--download-green);
  font-weight: 700;
}

.download-signing h3 {
  margin: 8px 0 0;
  font-size: 17px;
  line-height: 1.5;
}

.download-signing__facts {
  padding-left: 22px;
  color: var(--download-green);
  font-weight: 700;
}

.download-signing__facts li + li {
  margin-top: 0;
}

.download-signing a {
  display: inline-block;
  margin-top: 12px;
  color: var(--download-green);
  text-underline-offset: 3px;
}

.download-file-details dl {
  display: grid;
  gap: 8px;
}

.download-file-details code {
  font-size: 12px;
}

.download-file-details > p {
  color: var(--download-muted);
  font-size: 13px;
}

/* 本文：左に手順ナビ、右に手順3以降 */
.download-layout {
  display: grid;
  gap: 28px;
  margin-top: 28px;
  align-items: start;
}

.download-sidebar {
  display: none;
}

.download-content {
  display: grid;
  gap: 22px;
  min-width: 0;
}

.download-warnings {
  background: #fff;
  border: 1px solid var(--download-line);
  border-left: 5px solid var(--download-danger);
  border-radius: 16px;
  scroll-margin-top: 80px;
}

.download-warnings > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  cursor: pointer;
}

.download-warnings > summary::after {
  color: var(--download-danger);
}

.download-warnings__icon {
  display: grid;
  flex: 0 0 28px;
  height: 28px;
  color: #fff;
  background: var(--download-danger);
  border-radius: 50%;
  font-weight: 900;
  place-items: center;
}

.download-warnings__title {
  flex: 1;
  min-width: 0;
  color: var(--download-ink);
  font-size: 18px;
  font-weight: 800;
}

.download-warnings__body {
  padding: 0 22px 22px;
}

.download-warnings__stop {
  margin-bottom: 10px;
  padding: 12px 14px;
  background: var(--download-danger-soft);
  border-radius: 9px;
  font-size: 15px;
}

.download-warnings__stop strong {
  color: var(--download-danger);
}

.download-warnings__hint {
  margin-bottom: 12px;
  color: var(--download-muted);
  font-size: 14px;
}

.download-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.download-tab {
  min-height: 40px;
  padding: 6px 14px;
  color: var(--download-ink);
  background: #fff;
  border: 1.5px solid var(--download-ink);
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 800;
}

.download-tab[aria-selected="true"] {
  color: #fff;
  background: var(--download-ink);
}

.download-tab-panel ol {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 22px;
}

.download-tab-panel p {
  margin: 12px 0 0;
  font-size: 15px;
}

.download-tab-panel > p:first-child {
  margin: 0 0 10px;
}

.download-section,
.download-support {
  padding: clamp(22px, 4vw, 36px);
  background: var(--download-card);
  border: 1px solid var(--download-line);
  border-radius: 22px;
}

.download-section {
  box-shadow: 0 20px 50px rgba(105, 69, 37, 0.08);
  scroll-margin-top: 80px;
}

.download-section > h2 {
  margin-bottom: 8px;
  font-size: clamp(20px, 2.6vw, 24px);
}

.download-section__heading {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.download-section__heading > span {
  display: grid;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  place-items: center;
  color: #fff;
  background: var(--download-orange);
  border-radius: 50%;
  font-size: 20px;
  font-weight: 900;
}

.download-section__heading h2 {
  margin: 0;
  font-size: clamp(22px, 3vw, 28px);
}

.download-steps {
  display: grid;
  gap: 15px;
  margin: 0;
  padding: 0;
  counter-reset: download-step;
  list-style: none;
}

.download-steps li {
  position: relative;
  min-height: 38px;
  padding-left: 54px;
  counter-increment: download-step;
}

.download-steps li::before {
  position: absolute;
  top: 0;
  left: 0;
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: var(--download-orange-dark);
  background: var(--download-orange-soft);
  border-radius: 10px;
  content: counter(download-step);
  font-weight: 900;
}

.download-steps strong,
.download-steps span {
  display: block;
}

.download-steps strong {
  color: var(--download-ink);
}

.download-section > p:not([class]) {
  margin-bottom: 16px;
}

.download-section > .download-steps {
  margin-top: 20px;
}

.download-section__heading + .download-steps {
  margin-top: 0;
}

.download-section > .download-help {
  margin-top: 14px;
  border-top: 1px solid var(--download-line);
  border-bottom: 0;
}

.download-guide-image {
  margin: 0;
}

.download-guide-image img {
  width: 100%;
  margin-inline: auto;
  border: 1px solid var(--download-line);
  border-radius: 10px;
}

.download-guide-image figcaption {
  margin-top: 10px;
  font-size: 14px;
  text-align: center;
}

.download-setup-grid,
.download-activation-grid {
  display: grid;
  gap: 24px;
  align-items: start;
}

.download-setup-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
}

.download-setup-grid .download-guide-image img {
  max-width: 340px;
}

.download-activation-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
}

.download-input-guide {
  margin: 0;
}

.download-input-guide > div {
  padding-block: 12px;
  border-bottom: 1px solid var(--download-line);
}

.download-input-guide > div:first-child {
  padding-top: 0;
}

.download-input-guide > div:last-child {
  border-bottom: 0;
}

.download-input-guide dt {
  color: var(--download-ink);
  font-weight: 700;
}

.download-input-guide dd {
  margin: 4px 0 0;
  overflow-wrap: anywhere;
}

.download-pager {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  margin-top: 22px;
}

.download-pager a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.download-pager__prev {
  color: var(--download-ink);
  background: #fff;
  border: 1.5px solid var(--download-line);
}

.download-pager__prev:hover {
  color: var(--download-ink);
  background: var(--download-orange-soft);
}

.download-pager__next {
  margin-left: auto;
  padding-inline: 18px;
  color: #fff;
  background: var(--download-orange);
}

.download-pager__next:hover {
  color: #fff;
  background: var(--download-orange-dark);
}

.download-complete {
  margin-top: 20px;
  padding: 16px 18px;
  color: var(--download-green-dark);
  background: var(--download-green-soft);
  border: 1.5px solid var(--download-green);
  border-radius: 12px;
}

.download-complete strong {
  display: block;
  font-size: 17px;
}

.download-complete p {
  margin: 0;
}

.download-complete a {
  color: var(--download-green);
  font-weight: 800;
}

.download-support {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: 22px;
  align-items: center;
  color: #fff;
  background: var(--download-ink);
  border-color: var(--download-ink);
}

.download-support h2,
.download-support .download-eyebrow {
  color: #fff;
}

.download-support h2 {
  margin-bottom: 10px;
  font-size: clamp(20px, 2.6vw, 26px);
}

.download-support p:last-child {
  margin-bottom: 0;
}

.download-support__links {
  display: grid;
  gap: 10px;
}

.download-support__links a {
  padding: 10px 14px;
  color: var(--download-ink);
  background: #fff;
  border-radius: 9px;
  font-weight: 800;
  overflow-wrap: anywhere;
  text-align: center;
  text-decoration: none;
}

.download-footer {
  padding: 25px 18px;
  color: #b6a89b;
  background: #2f2721;
  font-size: 13px;
  text-align: center;
}

.download-footer p {
  margin: 0;
}

@media (min-width: 700px) {
  .download-release__details {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .download-file-details dl div {
    grid-template-columns: 110px minmax(0, 1fr);
  }
}

@media (min-width: 1080px) {
  .download-progress {
    display: none;
  }

  .download-layout {
    grid-template-columns: 230px minmax(0, 1fr);
  }

  .download-sidebar {
    position: sticky;
    top: 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 18px 14px;
    background: #fff;
    border: 1px solid var(--download-line);
    border-radius: 18px;
    box-shadow: 0 10px 30px rgba(105, 69, 37, 0.07);
  }

  .download-sidebar__title {
    margin: 0 0 6px 8px;
    color: var(--download-orange-dark);
    font-size: 13px;
    font-weight: 900;
    letter-spacing: 0.08em;
  }

  .download-sidebar__extra {
    display: grid;
    gap: 6px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--download-line);
  }

  .download-sidebar__extra a {
    padding: 4px 10px;
    color: var(--download-text);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
  }

  .download-sidebar__extra a:hover {
    color: var(--download-orange-dark);
  }

  .download-sidebar__extra .download-sidebar__line {
    display: flex;
    justify-content: center;
    margin-top: 4px;
    padding: 8px 12px;
    color: #fff;
    background: #06c755;
    border-radius: 999px;
    font-weight: 800;
  }

  .download-sidebar__extra .download-sidebar__line:hover {
    color: #fff;
    background: #00a849;
  }

  .download-hero,
  .download-release-panel,
  .download-section,
  .download-warnings {
    scroll-margin-top: 24px;
  }
}

@media (max-width: 520px) {
  .download-header {
    align-items: flex-start;
  }

  .download-header > span {
    max-width: 132px;
  }

  .download-warnings > summary {
    padding: 16px;
  }

  .download-warnings__body {
    padding: 0 16px 18px;
  }

  .download-warnings__title {
    font-size: 16px;
  }
}

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

  .download-progress__bar span {
    transition: none;
  }
}