/* ============================================
   ひなテックGames - 共通スタイル
   ============================================ */

/* リセット & ベース */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
  line-height: 1.7;
  color: #333;
  background-color: #FFF8F0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: #E67E22;
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #D35400;
}

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

/* ============================================
   ヘッダー
   ============================================ */
.site-header {
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: #333;
}

.site-logo img {
  height: 36px;
  width: auto;
}

.site-logo .site-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: #E67E22;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.header-nav a {
  color: #555;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.header-nav a:hover {
  color: #E67E22;
}

/* モバイルメニュー */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #333;
  margin: 5px 0;
  transition: transform 0.3s, opacity 0.3s;
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .header-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 1rem;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    gap: 0.75rem;
  }

  .header-nav.open {
    display: flex;
  }

  .header-nav a {
    font-size: 1rem;
    padding: 0.5rem 0;
  }
}

/* ============================================
   フッター
   ============================================ */
.site-footer {
  background: #333;
  color: #ccc;
  margin-top: auto;
  padding: 2rem 1rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: #ccc;
  font-size: 0.85rem;
}

.footer-links a:hover {
  color: #E67E22;
}

.footer-copyright {
  font-size: 0.8rem;
  color: #999;
}

/* ============================================
   ヒーローエリア
   ============================================ */
.hero {
  background: linear-gradient(135deg, #F39C12 0%, #E67E22 50%, #D35400 100%);
  color: #fff;
  text-align: center;
  padding: 3rem 1rem;
}

.hero h1 {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.95;
}

@media (min-width: 768px) {
  .hero {
    padding: 4rem 1rem;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .hero p {
    font-size: 1.25rem;
  }
}

/* ============================================
   ゲーム一覧（カードグリッド）
   ============================================ */
.section-title {
  font-size: 1.5rem;
  text-align: center;
  margin-bottom: 2rem;
  color: #333;
  position: relative;
  grid-column: 1 / -1;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: #E67E22;
  margin: 0.5rem auto 0;
  border-radius: 2px;
}

.games-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 1rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .games-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .games-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.game-card {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.2s, box-shadow 0.2s;
  color: inherit;
  display: flex;
  flex-direction: column;
  position: relative;
}

.game-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.game-card-link {
  text-decoration: none;
  color: inherit;
  display: block;
  flex: 1;
}

.game-card-thumb {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: #f0e6d6;
}

.game-card-body {
  padding: 1rem 1.25rem 1.25rem;
}

.game-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: #333;
}

.game-card-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
  background: #FFF3E0;
  color: #E67E22;
}

.game-card-source {
  position: absolute;
  bottom: 10px;
  right: 12px;
  font-size: 0.7rem;
  color: #aaa;
  text-decoration: none;
  transition: color 0.2s;
}

.game-card-source:hover {
  color: #555;
}

/* ============================================
   ひなテック紹介バナー
   ============================================ */
.promo-banner {
  background: linear-gradient(135deg, #FFF8E1, #FFECB3);
  padding: 2.5rem 1rem;
  text-align: center;
}

.promo-banner-inner {
  max-width: 600px;
  margin: 0 auto;
}

.promo-banner h2 {
  font-size: 1.35rem;
  color: #E67E22;
  margin-bottom: 0.75rem;
}

.promo-banner p {
  font-size: 0.95rem;
  color: #555;
  margin-bottom: 1.25rem;
  line-height: 1.8;
}

.btn-primary {
  display: inline-block;
  background: #E67E22;
  color: #fff;
  padding: 0.75rem 2rem;
  border-radius: 100px;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.2s, transform 0.2s;
  text-decoration: none;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background: #D35400;
  color: #fff;
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-block;
  background: #24292e;
  color: #fff;
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}

.btn-secondary:hover {
  background: #444d56;
  color: #fff;
  transform: translateY(-2px);
}

.game-promo .promo-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 16px;
}

/* ============================================
   ゲームページ共通
   ============================================ */
.game-page {
  max-width: 600px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.game-page-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.game-page-tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.game-container {
  margin-bottom: 2rem;
}

.game-instructions {
  background: #fff;
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 2rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.game-instructions h3 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: #E67E22;
}

.game-instructions ul {
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: #555;
}

.game-instructions li {
  margin-bottom: 0.25rem;
}

/* このゲームを作ってみよう！セクション */
.game-promo {
  background: linear-gradient(135deg, #FFF8E1, #FFECB3);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  text-align: center;
}

.game-promo h3 {
  font-size: 1.15rem;
  color: #E67E22;
  margin-bottom: 0.75rem;
}

.game-promo p {
  font-size: 0.9rem;
  color: #555;
  margin-bottom: 1rem;
  line-height: 1.8;
}

/* 他のゲームへの導線 */
.other-games {
  text-align: center;
}

.other-games a {
  font-weight: 600;
}

/* ============================================
   aboutページ
   ============================================ */
.about-page {
  max-width: 700px;
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
}

.about-page h1 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  color: #E67E22;
  text-align: center;
}

.about-section {
  background: #fff;
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.about-section h2 {
  font-size: 1.2rem;
  color: #333;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #FFF3E0;
}

.about-section p,
.about-section ul {
  font-size: 0.95rem;
  color: #555;
  line-height: 1.8;
}

.about-section ul {
  padding-left: 1.25rem;
}

.about-section li {
  margin-bottom: 0.25rem;
}

.about-cta {
  text-align: center;
  margin-top: 2rem;
}

/* ============================================
   ユーティリティ
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.text-center {
  text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* ============================================
   チュートリアルページ
   ============================================ */
.tutorial-page {
  max-width: 750px;
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
  counter-reset: tutorial-step;
}

.tutorial-page h1 {
  font-size: 1.6rem;
  margin-bottom: 0.75rem;
  color: #333;
  line-height: 1.4;
}

.tutorial-header {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
  align-items: center;
}

.tutorial-header a {
  font-size: 0.9rem;
  font-weight: 600;
}

.tutorial-step > h2::before {
  counter-increment: tutorial-step;
  content: "STEP " counter(tutorial-step);
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  color: #E67E22;
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
}

.code-block {
  background: #1e1e2e;
  color: #cdd6f4;
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 0.75rem 0;
  overflow-x: auto;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  -webkit-overflow-scrolling: touch;
}

.code-block code {
  font-family: inherit;
  font-size: inherit;
  white-space: pre;
}

.concept-list {
  list-style: none;
  padding-left: 0;
}

.concept-list li {
  padding: 0.4rem 0 0.4rem 1.75rem;
  position: relative;
  font-size: 0.95rem;
}

.concept-list li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: #2ECC71;
  font-weight: 700;
}

.faq-section h3 {
  font-size: 0.95rem;
  color: #E67E22;
  margin-top: 1rem;
  margin-bottom: 0.25rem;
}

.faq-section p {
  margin-bottom: 0.5rem;
}

.related-tutorials ul {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.related-tutorials li {
  margin-bottom: 0;
}

.related-tutorials a {
  display: inline-block;
  background: #FFF3E0;
  color: #E67E22;
  padding: 0.4rem 0.8rem;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: background 0.2s;
}

.related-tutorials a:hover {
  background: #FFE0B2;
}

.tutorial-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid #eee;
}

.tutorial-nav a {
  font-weight: 600;
  font-size: 0.95rem;
}

.tutorial-hero {
  background: linear-gradient(135deg, #6C63FF 0%, #E67E22 100%);
  color: #fff;
  text-align: center;
  padding: 3rem 1rem;
}

.tutorial-hero h1 {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
  color: #fff;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.tutorial-hero p {
  font-size: 1rem;
  opacity: 0.95;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

@media (min-width: 768px) {
  .tutorial-hero {
    padding: 4rem 1rem;
  }

  .tutorial-hero h1 {
    font-size: 2.25rem;
  }
}

.tutorial-keywords {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-top: 0.35rem;
}

.tutorial-keywords .tag {
  font-size: 0.65rem;
  padding: 0.15rem 0.45rem;
  background: #E8F5E9;
  color: #2E7D32;
}