/* ============================================================
   スクラッチまなびば — スタイルシート
   ============================================================ */

/* ===== デザイントークン ===== */
:root {
  --c-pink:    #FF9EC4;
  --c-blue:    #A8D8EA;
  --c-mint:    #A8E6CF;
  --c-yellow:  #FFD3A5;
  --c-purple:  #D4B8E0;
  --c-red-soft:#FFB3B3;
  --c-bg:      #FFF5F8;
  --c-white:   #FFFFFF;
  --c-text:    #555555;
  --c-heading: #E8557A;
  --c-border:  #FFD6E7;
  --c-muted:   #999999;

  --font:      'M PLUS Rounded 1c', sans-serif;
  --fs-base:   20px;
  --fs-large:  24px;
  --fs-xlarge: 32px;
  --fs-small:  16px;
  --fs-xsmall: 14px;
  --fs-ruby:   11px;
  --lh:        1.9;

  --sidebar-w: 228px;
  --header-h:  68px;
  --radius:    16px;
  --radius-sm: 8px;
  --shadow:    0 4px 16px rgba(232, 85, 122, 0.12);
  --shadow-hv: 0 8px 24px rgba(232, 85, 122, 0.22);
}

/* ===== リセット ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: var(--font); }
ul, ol { list-style: none; }

/* ===== ベース ===== */
body {
  font-family: var(--font);
  background: var(--c-bg);
  color: var(--c-text);
  font-size: var(--fs-base);
  line-height: var(--lh);
  min-height: 100vh;
}

/* ===== ルビ ===== */
ruby { ruby-align: center; }
rt {
  font-size: var(--fs-ruby);
  color: var(--c-heading);
  letter-spacing: 0.02em;
}

/* ===== ヘッダー ===== */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--c-white);
  border-bottom: 3px solid var(--c-pink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  z-index: 200;
  box-shadow: var(--shadow);
}

#header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}
#header-left:hover { opacity: 0.8; }

#header-mascot { font-size: 38px; line-height: 1; }

#header-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--c-heading);
  letter-spacing: 0.02em;
}

/* ===== レイアウト ===== */
#wrapper {
  display: flex;
  margin-top: var(--header-h);
  min-height: calc(100vh - var(--header-h));
}

/* ===== サイドバー ===== */
#sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--c-white);
  border-right: 2px solid var(--c-border);
  position: fixed;
  top: var(--header-h);
  left: 0;
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px 0 32px;
  z-index: 100;
}

#sidebar::-webkit-scrollbar { width: 4px; }
#sidebar::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 2px; }

.nav-home {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--c-heading);
  cursor: pointer;
  border-radius: var(--radius-sm);
  margin: 0 8px 8px;
  transition: background 0.15s;
}
.nav-home:hover, .nav-home.current { background: #FFE8F0; }

.nav-divider {
  height: 1px;
  background: var(--c-border);
  margin: 6px 12px;
}

.nav-chapter-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px 6px;
  font-size: var(--fs-xsmall);
  font-weight: 800;
  color: var(--c-heading);
  cursor: pointer;
  user-select: none;
  margin: 0 4px;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
}
.nav-chapter-header:hover { background: #FFE8F0; }

.nav-chapter-header .nav-toggle { font-size: 12px; transition: transform 0.2s; }
.nav-chapter-header.open .nav-toggle { transform: rotate(180deg); }

.nav-lessons {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.25s ease;
}
.nav-lessons.open { max-height: 600px; }

.nav-item {
  display: block;
  padding: 5px 16px 5px 24px;
  font-size: var(--fs-xsmall);
  color: var(--c-text);
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-radius: var(--radius-sm);
  margin: 0 8px;
  transition: background 0.12s, color 0.12s;
  user-select: none;
}
.nav-item:hover { background: #FFF0F5; color: var(--c-heading); }
.nav-item.current {
  background: var(--c-pink);
  color: #fff;
  font-weight: 700;
}

/* ===== メインコンテンツ ===== */
#main {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 36px 44px 64px;
  max-width: calc(100% - var(--sidebar-w));
}

/* ===== ページアニメーション ===== */
.page {
  animation: fadeUp 0.25s ease both;
  max-width: 860px;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== ホームページ ===== */
.home-hero {
  text-align: center;
  padding: 28px 0 40px;
}
.home-hero-mascot { font-size: 88px; margin-bottom: 10px; line-height: 1; }
.home-hero h2 {
  font-size: var(--fs-xlarge);
  font-weight: 800;
  color: var(--c-heading);
  margin-bottom: 6px;
}
.home-hero p { font-size: var(--fs-base); color: var(--c-muted); }

.chapter-cards { display: flex; flex-direction: column; gap: 20px; }

.chapter-card {
  background: var(--c-white);
  border-radius: var(--radius);
  padding: 22px 26px;
  box-shadow: var(--shadow);
  border-left: 6px solid var(--c-pink);
  cursor: pointer;
  transition: box-shadow 0.2s, transform 0.2s;
}
.chapter-card:hover { box-shadow: var(--shadow-hv); transform: translateX(4px); }
.chapter-card:nth-child(1) { border-left-color: var(--c-purple); }
.chapter-card:nth-child(2) { border-left-color: var(--c-blue); }
.chapter-card:nth-child(3) { border-left-color: var(--c-mint); }
.chapter-card:nth-child(4) { border-left-color: var(--c-yellow); }
.chapter-card:nth-child(5) { border-left-color: var(--c-pink); }
.chapter-card:nth-child(6) { border-left-color: var(--c-purple); }
.chapter-card:nth-child(7) { border-left-color: var(--c-blue); }
.chapter-card:nth-child(8) { border-left-color: var(--c-mint); }

.chapter-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.chapter-card-icon { font-size: 28px; }
.chapter-card h3 { font-size: var(--fs-large); color: var(--c-heading); font-weight: 800; }
.chapter-card p { font-size: var(--fs-small); color: var(--c-muted); margin-bottom: 12px; }

.lesson-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.lesson-chip {
  background: var(--c-bg);
  border: 2px solid var(--c-border);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: var(--fs-xsmall);
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}
.lesson-chip:hover {
  background: var(--c-pink);
  border-color: var(--c-pink);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== チャプター概要ページ ===== */
.chapter-overview-title {
  font-size: var(--fs-xlarge);
  font-weight: 800;
  color: var(--c-heading);
  margin-bottom: 6px;
}
.chapter-overview-sub {
  font-size: var(--fs-base);
  color: var(--c-muted);
  margin-bottom: 32px;
}

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.lesson-card {
  background: var(--c-white);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
  border-top: 4px solid var(--c-pink);
}
.lesson-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hv); }
.lesson-card .card-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--c-pink);
  display: block;
  margin-bottom: 6px;
}
.lesson-card h4 { font-size: var(--fs-small); color: var(--c-text); line-height: 1.5; }

/* ===== レッスンページ（プロローグ・第1章） ===== */
.lesson-header { margin-bottom: 28px; }
.lesson-header h2 {
  font-size: var(--fs-xlarge);
  font-weight: 800;
  color: var(--c-heading);
  margin-bottom: 6px;
}
.lesson-progress {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--c-border);
  border-radius: 20px;
  padding: 3px 14px;
  font-size: var(--fs-xsmall);
  color: var(--c-heading);
  font-weight: 700;
}

.lesson-body {
  background: var(--c-white);
  border-radius: var(--radius);
  padding: 32px 36px;
  box-shadow: var(--shadow);
  margin-bottom: 28px;
  font-size: var(--fs-base);
  line-height: var(--lh);
}
.lesson-body h3 {
  font-size: var(--fs-large);
  font-weight: 800;
  color: var(--c-heading);
  margin: 24px 0 10px;
  padding-left: 10px;
  border-left: 4px solid var(--c-pink);
}
.lesson-body h3:first-child { margin-top: 0; }
.lesson-body p { margin-bottom: 14px; }
.lesson-body ul, .lesson-body ol { padding-left: 1.6em; margin-bottom: 14px; }
.lesson-body li { margin-bottom: 6px; }

/* Warning box */
.warn-box {
  background: #FFFBEC;
  border: 2px solid var(--c-yellow);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin: 16px 0;
  font-size: var(--fs-base);
}
.warn-box .warn-icon { font-size: 24px; flex-shrink: 0; }

/* Password comparison */
.pw-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 16px 0;
}
.pw-box {
  border-radius: var(--radius-sm);
  padding: 16px;
  font-size: var(--fs-small);
}
.pw-good { background: #EDFAF4; border: 2px solid var(--c-mint); }
.pw-bad  { background: #FFF0F0; border: 2px solid var(--c-red-soft); }
.pw-box h4 { font-size: var(--fs-base); font-weight: 800; margin-bottom: 8px; }
.pw-box p  { margin-bottom: 4px; }

/* Step boxes (prologue P-2 手順) */
.step-box {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px;
  background: var(--c-bg);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}
.step-box .step-circle {
  width: 36px; height: 36px;
  background: var(--c-pink);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 800;
  flex-shrink: 0;
}
.step-box .step-body strong { display: block; font-size: var(--fs-base); margin-bottom: 4px; }
.step-box .step-body p { font-size: var(--fs-small); color: var(--c-text); margin: 0; }

/* Image placeholder */
.img-ph {
  width: 100%;
  max-width: 480px;
  height: 160px;
  background: #F5F5F5;
  border: 2px dashed #DDD;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: #BBB;
  font-size: var(--fs-xsmall);
  margin: 10px 0;
}
.img-ph span { font-size: 28px; }

/* ===== ナビゲーションボタン（レッスン下部） ===== */
.lesson-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

/* ===== ゲームレッスン（3ステップ） ===== */
.game-title {
  font-size: var(--fs-xlarge);
  font-weight: 800;
  color: var(--c-heading);
  margin-bottom: 24px;
}
.game-title .game-num {
  font-size: var(--fs-base);
  color: var(--c-muted);
  font-weight: 400;
  margin-right: 8px;
}

.step-tabs {
  display: flex;
  gap: 4px;
  padding: 8px 8px 0;
  background: var(--c-bg);
  border-radius: var(--radius) var(--radius) 0 0;
}

.step-tab {
  flex: 1;
  padding: 12px 6px;
  border: none;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  background: #F0E4EC;
  color: #aaa;
  font-size: var(--fs-xsmall);
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  line-height: 1.4;
  transition: background 0.15s, color 0.15s;
  user-select: none;
}
.step-tab:hover { background: #FFD6E7; color: var(--c-heading); }
.step-tab.active {
  background: var(--c-white);
  color: var(--c-heading);
  box-shadow: 0 -2px 6px rgba(232,85,122,0.1);
}
.step-tab .tab-num {
  display: block;
  font-size: 10px;
  opacity: 0.7;
  margin-bottom: 2px;
  letter-spacing: 0.05em;
}
.step-tab .tab-label { font-size: var(--fs-xsmall); }

.step-panel {
  display: none;
  background: var(--c-white);
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  margin-bottom: 28px;
}
.step-panel.active { display: block; }

.step-lead {
  font-size: var(--fs-large);
  font-weight: 800;
  color: var(--c-heading);
  margin-bottom: 20px;
}

.scratch-embed-wrap {
  display: flex;
  justify-content: center;
  margin: 20px 0;
}

.scratch-ph {
  width: 485px;
  height: 402px;
  background: #F8F8F8;
  border: 3px dashed var(--c-border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: #CCC;
  font-size: var(--fs-small);
  text-align: center;
  padding: 20px;
}
.scratch-ph .ph-icon { font-size: 56px; }

.step-note {
  text-align: center;
  font-size: var(--fs-base);
  color: var(--c-muted);
  margin: 14px 0 20px;
}

/* Make steps inside STEP2 */
.make-step {
  background: var(--c-bg);
  border-left: 4px solid var(--c-mint);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 20px;
  margin-bottom: 14px;
}
.make-step strong {
  display: block;
  font-size: var(--fs-base);
  color: var(--c-heading);
  margin-bottom: 8px;
}
.make-step p { font-size: var(--fs-base); margin-bottom: 6px; }

/* Content placeholder (game STEP2 not yet filled in) */
.content-ph {
  background: var(--c-bg);
  border: 2px dashed var(--c-border);
  border-radius: var(--radius);
  padding: 36px 24px;
  text-align: center;
  color: var(--c-muted);
}
.content-ph .ph-icon { font-size: 48px; margin-bottom: 12px; }
.content-ph p { font-size: var(--fs-base); margin-bottom: 6px; }

/* Remix steps (STEP3) */
.remix-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 20px 0;
}
.remix-step {
  background: var(--c-bg);
  border-radius: var(--radius);
  padding: 18px 22px;
  border-left: 5px solid var(--c-blue);
}
.remix-step strong {
  display: block;
  font-size: var(--fs-base);
  color: var(--c-heading);
  margin-bottom: 8px;
}
.remix-step p { font-size: var(--fs-base); margin-bottom: 6px; }

/* ===== ボタン ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font);
  font-size: var(--fs-base);
  font-weight: 700;
  padding: 12px 28px;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
  user-select: none;
  text-decoration: none;
  line-height: 1.3;
}
.btn:hover:not(:disabled) { transform: translateY(-2px); box-shadow: var(--shadow-hv); }
.btn:active:not(:disabled) { transform: translateY(0); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-primary { background: var(--c-pink);   color: #fff; }
.btn-next    { background: var(--c-mint);   color: #333; }
.btn-back    { background: #E8E8E8;          color: #666; }
.btn-scratch { background: var(--c-yellow); color: #333; font-size: 18px; padding: 16px 36px; }
.btn-done    { background: #B8E8C8;         color: #2D6040; }
.btn-typing  { background: var(--c-blue);   color: #333; font-size: var(--fs-small); padding: 10px 20px; }
.btn-record  { background: var(--c-purple); color: #333; }

/* ===== タイピングコーナー ===== */
.typing-header h2 {
  font-size: var(--fs-xlarge);
  font-weight: 800;
  color: var(--c-heading);
  margin-bottom: 4px;
}
.typing-header p { font-size: var(--fs-base); color: var(--c-muted); margin-bottom: 32px; }

.typing-courses {
  display: flex;
  gap: 18px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}
.typing-course {
  flex: 1; min-width: 200px;
  background: var(--c-white);
  border-radius: var(--radius);
  padding: 26px 22px;
  text-align: center;
  box-shadow: var(--shadow);
  border-top: 5px solid var(--c-pink);
  transition: transform 0.2s, box-shadow 0.2s;
}
.typing-course:nth-child(2) { border-top-color: var(--c-blue); }
.typing-course:hover { transform: translateY(-4px); box-shadow: var(--shadow-hv); }
.typing-course .course-icon { font-size: 44px; margin-bottom: 10px; }
.typing-course h3 {
  font-size: var(--fs-large);
  color: var(--c-heading);
  font-weight: 800;
  margin-bottom: 14px;
}

.score-section {
  background: var(--c-white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}
.score-section h3 {
  font-size: var(--fs-large);
  font-weight: 800;
  color: var(--c-heading);
  margin-bottom: 20px;
}

.score-form {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 24px;
}
.score-form label { font-weight: 700; font-size: var(--fs-base); }
.score-form select,
.score-form input[type="number"] {
  font-family: var(--font);
  font-size: var(--fs-base);
  padding: 10px 14px;
  border: 2px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-bg);
  outline: none;
  transition: border-color 0.2s;
}
.score-form select:focus,
.score-form input:focus { border-color: var(--c-pink); }
.score-form input[type="number"] { width: 110px; }

.score-table-wrap { overflow-x: auto; }
.score-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-base);
}
.score-table th {
  background: var(--c-pink);
  color: #fff;
  padding: 12px 16px;
  text-align: center;
  font-weight: 700;
}
.score-table td {
  padding: 10px 16px;
  text-align: center;
  border-bottom: 1px solid var(--c-border);
}
.score-table tr:hover td { background: var(--c-bg); }
.no-score-row td { color: var(--c-muted); padding: 24px; }

/* ===== 付録ページ ===== */
.appendix-card {
  background: var(--c-white);
  border-radius: var(--radius);
  padding: 22px 26px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  cursor: pointer;
  border-left: 6px solid var(--c-blue);
  transition: box-shadow 0.2s, transform 0.2s;
}
.appendix-card:hover { box-shadow: var(--shadow-hv); transform: translateX(4px); }
.appendix-card h3 { font-size: var(--fs-large); color: var(--c-heading); font-weight: 800; margin-bottom: 6px; }
.appendix-card p  { font-size: var(--fs-small); color: var(--c-muted); }


/* ===== テニスコース 固有スタイル ===== */
.tennis-rules {
  background: #fff0f7;
  border: 2px solid var(--c-pink);
  border-radius: var(--radius);
  padding: 14px 20px;
  margin: 16px 0;
}

.tennis-rule-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--c-border);
  font-size: var(--fs-base);
  flex-wrap: wrap;
}
.tennis-rule-row:last-child { border-bottom: none; }

.tennis-rule-label {
  font-weight: 700;
  min-width: 180px;
  color: var(--c-heading);
}

.tennis-chars {
  display: flex;
  gap: 14px;
  margin: 16px 0;
  flex-wrap: wrap;
}

.tennis-char {
  flex: 1;
  min-width: 110px;
  background: #fff0f7;
  border: 2px solid var(--c-border);
  border-radius: var(--radius);
  padding: 14px 12px;
  text-align: center;
}

.tennis-char-icon { font-size: 32px; margin-bottom: 8px; }
.tennis-char strong { color: var(--c-heading); font-size: var(--fs-large); display: block; margin-bottom: 4px; }
.tennis-char p { font-size: var(--fs-small); color: var(--c-muted); margin: 0; }

.tennis-key-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: var(--fs-base);
}
.tennis-key-table th,
.tennis-key-table td {
  border: 2px solid var(--c-border);
  padding: 10px 16px;
  text-align: left;
}
.tennis-key-table th { background: var(--c-pink); color: #fff; font-weight: 700; }
.tennis-key-table tr:nth-child(even) td { background: #fff5f8; }

kbd {
  display: inline-block;
  background: #fff;
  border: 2px solid #ccc;
  border-bottom: 3px solid #999;
  border-radius: 5px;
  padding: 1px 8px;
  font-family: monospace;
  font-size: 15px;
  font-weight: bold;
  color: #333;
}

.hint-box {
  background: #fffbe6;
  border: 2px solid #ffe44d;
  border-radius: var(--radius);
  padding: 14px 20px;
  margin: 16px 0;
}
.hint-box strong { color: #b07d00; font-size: var(--fs-base); display: block; margin-bottom: 6px; }
.hint-box p { font-size: var(--fs-small); margin: 0; }

.link-inline { color: var(--c-heading); text-decoration: underline; font-weight: 700; }
.link-inline:hover { opacity: 0.75; }