@font-face {
  font-family: 'AtelierPixel';
  src: url('../Fonts/PixelMplus10-Regular.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #f1efe8;
  --surface: #ffffff;
  --surface-2: #e9e7de;
  --border: #b4b2a9;
  --border-strong: #5f5e5a;
  --border-stronger: #2c2c2a;
  --text: #2c2c2a;
  --text-secondary: #5f5e5a;
  --text-muted: #888780;
  --accent-light: #1D9E75;
  --accent-text: #04342c;
  --grid-line: rgba(44, 44, 42, 0.06);
  --grid-dot: rgba(44, 44, 42, 0.08);
  --pattern-dots: radial-gradient(var(--grid-dot) 1px, transparent 1px);
  --font-body: 'AtelierPixel', monospace;
}

/* ========== 共通 ========== */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 20px;
  line-height: 1.6;
}

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

/*-ボタンは親のフォントを引き継がないので明示する-*/
button {
  font-family: inherit;
}

/*-言語ごとに書き分けた文章(data-lang-only)は、選んでいない言語の方を隠す-*/
html[data-lang="ja"] [data-lang-only="en"],
html[data-lang="en"] [data-lang-only="ja"] {
  display: none;
}

/*-データが無い時の案内文-*/
.empty-text {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

/*-サイト全体を囲む枠-*/
.frame {
  max-width: 960px;
  margin: 24px auto;
  padding: 6px;
  background: var(--bg);
  border: 4px solid var(--border-stronger);
  box-shadow:
    inset 0 0 0 2px var(--bg),
    inset 0 0 0 4px var(--border-strong);
}

/*-方眼の背景(ヒーロー・ページ見出し・作品カード一覧で共通)-*/
.hero,
.page-heading,
.works-grid,
.not-found {
  background: var(--bg);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* ========== ヘッダー ========== */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 24px;
  border-bottom: 4px solid var(--border-stronger);
  background: var(--surface-2) var(--pattern-dots);
  background-size: 16px 16px;
}

/*-サイトのロゴ-*/
.logo {
  font-size: 24px;
  font-weight: bold;
  letter-spacing: 1px;
}

.nav {
  display: flex;
  gap: 20px;
  font-size: 16px;
  color: var(--text-secondary);
}

.nav a:hover {
  color: var(--text);
}

.nav-active {
  color: var(--text);
  border-bottom: 2px solid var(--accent-light);
  padding-bottom: 3px;
}

/* ========== ホーム ========== */
.hero {
  text-align: center;
  padding: 56px 24px 48px;
}

.hero-dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-bottom: 24px;
}

.dot {
  width: 12px;
  height: 12px;
  display: inline-block;
}

.dot-plain {
  background: var(--border-stronger);
}

.dot-accent {
  background: var(--accent-light);
}

.hero-title {
  font-size: 32px;
  line-height: 2;
  margin: 0 0 16px;
  text-shadow: 3px 3px 0 var(--surface-2);
}

.hero-sub {
  font-size: 16px;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
  margin: 0 0 32px;
}

.btn-pixel {
  display: inline-block;
  font-size: 16px;
  padding: 14px 24px;
  border: 2px solid var(--border-stronger);
  background: var(--accent-light);
  color: var(--accent-text);
  box-shadow: 4px 4px 0 var(--border-strong);
  transition: transform 0.1s ease;
}

.btn-pixel:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--border-strong);
}

/*-各セクションの見出し(おしらせ・おすすめ作品・SNS)-*/
.section-header {
  padding: 20px 24px 0;
  border-top: 4px solid var(--border-stronger);
  background: var(--bg);
}

.section-header h2 {
  font-size: 16px;
  font-weight: bold;
  letter-spacing: 1px;
  margin: 0;
}

/*-おしらせ-*/
.news-list {
  display: flex;
  flex-direction: column;
  padding: 16px 24px 24px;
  background: var(--bg);
}

.news-item {
  display: flex;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 2px dashed var(--border);
  font-size: 15px;
}

a.news-item:hover .news-text {
  color: var(--accent-light);
}

.news-date {
  flex-shrink: 0;
  color: var(--text-muted);
}

/*-YouTube の最新動画(広い画面では3つ横に並べる)-*/
.youtube {
  padding: 16px 24px 24px;
  background: var(--bg);
}

.video-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 16px;
}

.video-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border: 2px solid var(--border-stronger);
  background: var(--surface-2);
  box-shadow: 3px 3px 0 var(--border-strong);
  padding: 8px;
}

.video-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 2px solid var(--border-stronger);
}

.video-title {
  font-size: 13px;
  line-height: 1.4;
}

.video-card:hover .video-title {
  color: var(--accent-light);
}

.youtube-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/*-狭い画面では、サムネイルを左・タイトルを右にして縦に並べる-*/
@media (max-width: 640px) {
  .video-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .video-card {
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

  .video-card img {
    width: 120px;
    flex-shrink: 0;
  }
}

/* ========== 各ページの見出し ========== */
.page-heading {
  padding: 40px 24px 24px;
}

.page-heading h1 {
  font-size: 16px;
  font-weight: bold;
  letter-spacing: 1px;
  margin: 0 0 10px;
}

.page-heading p {
  font-size: 16px;
  color: var(--text-secondary);
  margin: 0;
}

/* ========== 作品一覧ページの絞り込み ========== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0 24px 24px;
  background: var(--bg);
}

.filter-btn {
  font-size: 14px;
  letter-spacing: 1px;
  padding: 10px 14px;
  border: 2px solid var(--border-stronger);
  background: var(--surface-2);
  color: var(--text-secondary);
  cursor: pointer;
}

.filter-btn:hover {
  color: var(--text);
}

.filter-btn.is-active {
  background: var(--accent-light);
  color: var(--accent-text);
}

.no-results {
  font-size: 10px;
  color: var(--text-muted);
  text-align: center;
  padding: 0 24px 24px;
  background: var(--bg);
}

/* ========== 利用規約など文章のページ ========== */
.doc-body {
  padding: 8px 24px 32px;
  background: var(--bg);
  max-width: 720px;
}

.doc-body h2 {
  font-size: 16px;
  letter-spacing: 1px;
  margin: 28px 0 8px;
  padding-left: 10px;
  border-left: 4px solid var(--accent-light);
}

.doc-body p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0 0 12px;
}

.doc-body .doc-date {
  margin-top: 32px;
  font-size: 13px;
  color: var(--text-muted);
}

/* ========== 404ページ ========== */
.not-found {
  text-align: center;
  padding: 64px 24px;
}

.not-found-code {
  font-size: 64px;
  line-height: 1;
  margin: 0 0 16px;
}

.not-found p {
  margin: 0 0 32px;
  color: var(--text-secondary);
}

/* ========== 作品詳細ページ ========== */
.work-detail {
  padding: 24px;
  background: var(--bg);
}

.work-back {
  display: inline-block;
  margin-bottom: 20px;
  font-size: 14px;
  color: var(--text-secondary);
}

.work-back:hover {
  color: var(--text);
}

.work-hero {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  align-items: start;
}

.work-thumb {
  border: 2px solid var(--border-stronger);
  box-shadow: 4px 4px 0 var(--border-strong);
}

.work-title {
  font-size: 24px;
  letter-spacing: 1px;
  margin: 0 0 12px;
}

.work-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0 0 16px;
}

.work-section {
  margin-top: 32px;
}

.work-section h2 {
  font-size: 16px;
  letter-spacing: 1px;
  margin: 0 0 12px;
  padding-left: 10px;
  border-left: 4px solid var(--accent-light);
}

.work-section p,
.work-steps,
.work-changelog {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.work-section p {
  margin: 0 0 8px;
}

.work-section .download-list {
  max-width: 360px;
  border-top: none;
  padding-top: 0;
}

.work-steps {
  margin: 0;
  padding-left: 1.5em;
}

.work-screenshots {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}

.work-screenshots img {
  width: 100%;
  border: 2px solid var(--border-stronger);
}

.work-video {
  max-width: 640px;
  aspect-ratio: 16 / 9;
  border: 2px solid var(--border-stronger);
}

.work-video iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

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

.work-changelog li {
  padding: 10px 0;
  border-bottom: 2px dashed var(--border);
}

.changelog-version {
  color: var(--text);
  margin-right: 12px;
}

.changelog-date {
  font-size: 13px;
  color: var(--text-muted);
}

@media (max-width: 640px) {
  .work-hero {
    grid-template-columns: 1fr;
  }
}

/* ========== ABOUTページ ========== */
.about-body {
  padding: 8px 24px 32px;
  background: var(--bg);
  max-width: 640px;
}

.about-body p {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0 0 18px;
}

.profile-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 28px;
}

.profile-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  border: 2px solid var(--border-stronger);
  background: var(--surface-2);
  box-shadow: 4px 4px 0 var(--border-strong);
  padding: 16px;
}

.profile-img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border: 2px solid var(--border-stronger);
  flex-shrink: 0;
}

.profile-info {
  flex: 1;
}

.profile-name {
  font-size: 16px;
  letter-spacing: 1px;
  margin: 0 0 8px;
}

.profile-info p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.4;
  margin: 0 0 12px;
}

.profile-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.btn-small {
  display: inline-block;
  font-size: 10px;
  padding: 6px 10px;
  border: 2px solid var(--border-stronger);
  background: var(--surface);
  color: var(--text);
  box-shadow: 3px 3px 0 var(--border-strong);
  transition: transform 0.1s ease;
}

.btn-small:hover {
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 var(--border-strong);
}

/* ========== 言語切替 ========== */
.lang-toggle {
  display: flex;
  border: 2px solid var(--border-stronger);
}

.lang-btn {
  font-size: 9px;
  padding: 8px 12px;
  background: var(--surface-2);
  color: var(--text-secondary);
  border: none;
  cursor: pointer;
}

.lang-btn+.lang-btn {
  border-left: 2px solid var(--border-stronger);
}

.lang-btn.is-active {
  background: var(--accent-light);
  color: var(--accent-text);
}

/*-ナビと言語切替のまとまり(狭い画面では全画面メニューになる)-*/
.site-menu {
  display: flex;
  align-items: center;
  gap: 18px;
}

/* ========== ハンバーガーメニュー ========== */
/*-ハンバーガーボタン(通常時は非表示)-*/
.menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  padding: 0 8px;
  border: 2px solid var(--border-stronger);
  background: var(--surface-2);
  box-shadow: 3px 3px 0 var(--border-strong);
  cursor: pointer;
}

.menu-btn span {
  display: block;
  height: 4px;
  background: var(--border-stronger);
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.menu-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--border-strong);
}

/*-開いている時は「×」にする-*/
.is-menu-open .menu-btn span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.is-menu-open .menu-btn span:nth-child(2) {
  opacity: 0;
}

.is-menu-open .menu-btn span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/*-ヘッダーの項目が1行に収まらない幅(約530px)より少し余裕を持たせて切り替え-*/
@media (max-width: 600px) {
  .menu-btn {
    display: flex;
  }

  /*-ロゴと「×」を全画面メニューの上に表示する-*/
  .logo,
  .menu-btn {
    position: relative;
    z-index: 1001;
  }

  /*-ナビと言語切替を、上から下りてくる全画面メニューにする(閉じている時は画面の上に隠す)-*/
  .site-menu {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    gap: 40px;
    padding: 120px 24px 24px; /*-上はロゴと「×」に重ならない分の余白-*/
    background: var(--surface-2) var(--pattern-dots);
    background-size: 16px 16px;
    overflow-y: auto;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.4s ease-in-out, opacity 0.4s ease-in-out, visibility 0.4s;
    z-index: 1000;
  }

  .is-menu-open .site-menu {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav {
    flex-direction: column;
    align-items: center;
    gap: 16px;
    font-size: 24px;
  }

  .nav a {
    padding: 4px 8px;
  }

  .lang-btn {
    font-size: 14px;
    padding: 10px 16px;
  }

  /*-中の項目は上から少しずつ遅れて表示-*/
  .nav a,
  .lang-toggle {
    opacity: 0;
    transform: translateY(-20px);
    transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
  }

  .is-menu-open .nav a,
  .is-menu-open .lang-toggle {
    opacity: 1;
    transform: translateY(0);
  }

  .is-menu-open .nav a:nth-child(1) { transition-delay: 0.1s; }
  .is-menu-open .nav a:nth-child(2) { transition-delay: 0.2s; }
  .is-menu-open .nav a:nth-child(3) { transition-delay: 0.3s; }
  .is-menu-open .lang-toggle        { transition-delay: 0.4s; }

  /*-開いている間は後ろのページをスクロールさせない-*/
  body.is-scroll-locked {
    overflow: hidden;
  }
}

/* ========== 作品カード ========== */
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: start;
  gap: 18px;
  padding: 24px;
}

@media (max-width: 760px) {
  .works-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .works-grid {
    grid-template-columns: 1fr;
  }
}

.card {
  border: 2px solid var(--border-stronger);
  background: var(--surface-2);
  box-shadow: 4px 4px 0 var(--border-strong);
}

.card-thumb {
  width: 100%;
  height: 220px;
  overflow: hidden;
  background: var(--bg);
  border-bottom: 2px solid var(--border-stronger);
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-body h2 a:hover {
  color: var(--accent-light);
}

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

.card-thumb img.pixel-icon {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.card-body {
  padding: 16px;
}

.card-body h2 {
  font-size: 16px;
  letter-spacing: 1px;
  margin: 0 0 10px;
  line-height: 1.6;
}

.card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 14px;
  line-height: 1.4;
}

.tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 1px;
  padding: 5px 9px;
  background: var(--border-strong);
  color: var(--surface);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

/*-いいねボタンの行-*/
.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 14px;
}

.card-meta:not(:has(> :not([hidden]))) {
  display: none; /*-いいねボタンが隠れている時は行ごと消す-*/
}

.like-btn {
  margin-left: auto;
  font-size: 13px;
  padding: 4px 10px;
  border: 2px solid var(--border-stronger);
  background: var(--surface);
  color: var(--text-secondary);
  box-shadow: 2px 2px 0 var(--border-strong);
  cursor: pointer;
}

.like-btn:hover:not(:disabled) {
  color: #d0466b;
}

.like-btn.is-liked {
  background: #f6dde4;
  color: #d0466b;
  cursor: default;
}

.download-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 10px;
  border-top: 2px dashed var(--border);
}

.download-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.download-btn {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 1px;
  padding: 8px 12px;
  border: 2px solid var(--border-stronger);
  background: var(--accent-light);
  color: var(--accent-text);
  box-shadow: 4px 4px 0 var(--border-strong);
  transition: transform 0.1s ease;
}

.download-btn:hover {
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 var(--border-strong);
}

.download-btn.is-disabled {
  background: var(--surface);
  color: var(--text-muted);
  border-color: var(--border);
  box-shadow: 4px 4px 0 var(--border);
  cursor: not-allowed;
  pointer-events: none;
}

.version-badge {
  font-size: 16px;
  padding: 3px 6px;
  white-space: nowrap;
  color: var(--text-muted);
}

/*-「作品をすべて見る」リンクのカード-*/
.card-see-all {
  grid-column: 1 / -1;
  border: 2px dashed var(--border-strong);
  background: transparent;
  box-shadow: none;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 64px;
  font-size: 16px;
  color: var(--text-muted);
  text-align: center;
  line-height: 2;
}

/* ========== フッター ========== */
.site-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 16px 24px;
  border-top: 4px solid var(--border-stronger);
  background: var(--surface-2);
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--text-muted);
  text-align: center;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: underline;
}

.footer-link:hover {
  color: var(--text);
}