/* ==========================================================================
   ことわざパズル - シニア向けデザインシステム (style.css)
   ========================================================================== */

/* 変数の定義（コントラスト重視の和モダン配色） */
:root {
  --bg-color: #FDFBF7;           /* 温かみのある和紙風の背景色 */
  --text-color: #262626;         /* 視認性の高い墨色（高コントラスト） */
  --text-muted: #545454;         /* やや薄い墨色（補助テキスト用） */
  
  --primary-color: #A93226;      /* 臙脂（えんじ）色 - 主要アクション用 */
  --primary-hover: #8E281F;
  --secondary-color: #1F4E5B;    /* 藍鉄（あいてつ）色 - 練習モード用 */
  --secondary-hover: #173B45;
  
  --correct-color: #196F3D;      /* 深緑 - 正解表示用 */
  --correct-bg: #E8F8F5;
  --incorrect-color: #7B7D7D;    /* 灰色 - 不正解時（責めないよう穏やかなグレー） */
  --incorrect-bg: #F2F3F4;
  
  --card-bg: #FFFFFF;
  --border-color: #D5DBDB;
  --shadow-color: rgba(0, 0, 0, 0.15);
  
  /* フォント指定 */
  --font-family: 'Kiwi Maru', 'M PLUS Rounded 1c', 'Hiragino Kaku Gothic ProN', 'BIZ UDPGothic', sans-serif;
}

/* リセット & 基本設定 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent; /* タップ時のハイライトを無効化 */
}

body {
  font-family: var(--font-family);
  background-color: #EAE5DB; /* アプリ外側の背景色（PC表示用） */
  color: var(--text-color);
  font-size: 20px;          /* シニア向け：基本フォントサイズを20px以上に設定 */
  line-height: 1.6;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}

/* アプリ全体コンテナ（スマホ最適化・最大幅600px） */
#app-container {
  width: 100%;
  max-width: 600px;
  min-height: 100vh;
  background-color: var(--bg-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  position: relative;
}

/* ヘッダー */
.app-header {
  background-color: #FFFFFF;
  border-bottom: 3px solid var(--primary-color);
  padding: 16px 20px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.app-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--primary-color);
}

.header-btn {
  background-color: var(--incorrect-bg);
  border: 2px solid var(--text-color);
  border-radius: 30px;
  padding: 8px 16px;
  font-size: 16px;
  font-weight: bold;
  font-family: inherit;
  color: var(--text-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 2px 0 var(--text-color);
  transition: transform 0.1s, box-shadow 0.1s;
}

.header-btn:active {
  transform: translateY(2px);
  box-shadow: none;
}

.header-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
}

.mode-badge {
  background-color: var(--primary-color);
  color: #FFFFFF;
  font-size: 14px;
  padding: 4px 10px;
  border-radius: 4px;
  font-weight: bold;
}

.mode-badge.practice {
  background-color: var(--secondary-color);
}

.header-btn-sub {
  background: none;
  border: none;
  color: var(--secondary-color);
  font-size: 16px;
  font-weight: bold;
  text-decoration: underline;
  cursor: pointer;
  padding: 4px 8px;
}

/* メインコンテンツエリア */
.app-content {
  flex: 1;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
}

/* 画面の切り替え表示制御 */
.game-screen {
  display: none;
  width: 100%;
}

.game-screen.active {
  display: block;
}

/* --- 1. トップ画面 --- */
.top-hero {
  text-align: center;
  padding: 30px 10px;
  background: linear-gradient(135deg, #FBF8F3 0%, #F5EFEB 100%);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  margin-bottom: 30px;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-muted);
  font-weight: bold;
  margin-bottom: 8px;
}

.hero-lead {
  font-size: 24px;
  font-weight: bold;
  color: var(--primary-color);
}

/* レベル選択UI */
.level-select-container {
  margin-bottom: 24px;
  background-color: #FFFFFF;
  border: 3px solid var(--text-color);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 4px 0 var(--text-color);
}

.level-select-title {
  font-size: 18px;
  font-weight: bold;
  text-align: center;
  margin-bottom: 12px;
  color: var(--text-muted);
}

.level-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn-level {
  width: 100%;
  min-height: 56px; /* タップ高さ十分 */
  border-radius: 8px;
  border: 2.5px solid var(--text-color);
  background-color: #FFFFFF;
  color: var(--text-color);
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  box-shadow: 0 3px 0 var(--text-color);
  transition: transform 0.1s, box-shadow 0.1s;
}

.btn-level:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--text-color);
}

.btn-level.selected {
  background-color: #FDEDEC;
  border-color: var(--primary-color);
  box-shadow: 0 3px 0 var(--primary-color);
  border-width: 3.5px;
}

.btn-level.selected .level-text {
  color: var(--primary-color);
}

.btn-level.selected .level-status {
  background-color: var(--primary-color);
  color: #FFFFFF;
}

.level-icon {
  font-size: 18px;
  flex-shrink: 0;
  width: 50px;
  text-align: left;
}

.level-text {
  flex-grow: 1;
  text-align: left;
  font-size: 20px;
}

.level-status {
  font-size: 14px;
  background-color: var(--incorrect-bg);
  border: 1px solid var(--text-color);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: bold;
}

.level-status.completed {
  background-color: var(--correct-color);
  color: #FFFFFF;
  border-color: var(--correct-color);
}

/* ボタンベース（シニアが押しやすいよう高さ60px以上、立体感あり） */
button {
  font-family: var(--font-family);
}

.menu-buttons {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.btn-primary, .btn-secondary, .btn-info, .btn-modal-action, .btn-share-main {
  width: 100%;
  min-height: 64px; /* タップ目標高さ 64px */
  border-radius: 12px;
  font-size: 20px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  transition: transform 0.1s, box-shadow 0.1s;
}

.btn-primary {
  background-color: var(--primary-color);
  color: #FFFFFF;
  border: 3px solid var(--text-color);
  box-shadow: 0 5px 0 var(--text-color);
}

.btn-primary:active {
  transform: translateY(4px);
  box-shadow: 0 1px 0 var(--text-color);
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: #FFFFFF;
  border: 3px solid var(--text-color);
  box-shadow: 0 5px 0 var(--text-color);
}

.btn-secondary:active {
  transform: translateY(4px);
  box-shadow: 0 1px 0 var(--text-color);
}

.btn-info {
  background-color: #FFFFFF;
  color: var(--text-color);
  border: 3px solid var(--text-color);
  box-shadow: 0 5px 0 var(--text-color);
}

.btn-info:active {
  transform: translateY(4px);
  box-shadow: 0 1px 0 var(--text-color);
}

.btn-text-only {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  text-decoration: underline;
  cursor: pointer;
  padding: 10px;
  font-weight: bold;
}

.streak-badge-container {
  margin-top: 40px;
  text-align: center;
}

.streak-text {
  font-size: 22px;
  font-weight: bold;
  color: var(--primary-color);
  background-color: #FDEDEC;
  display: inline-block;
  padding: 10px 24px;
  border-radius: 30px;
  border: 2px dashed var(--primary-color);
}

/* --- 2. プレイ画面 --- */
.game-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
}

.question-progress {
  font-weight: bold;
  font-size: 18px;
  color: var(--text-muted);
}

.progress-stamps {
  display: flex;
  gap: 8px;
}

.stamp {
  font-size: 24px;
  line-height: 1;
}

/* 初回ガイド吹き出し */
.guide-tooltip {
  background-color: #FCF3CF;
  color: #7D6608;
  border: 2px solid #F4D03F;
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 15px;
  position: relative;
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.02); }
  100% { transform: scale(1); }
}

#question-area {
  margin-bottom: 24px;
}

.question-instruction {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 10px;
  font-weight: bold;
}

.question-text-box {
  background-color: #FFFFFF;
  border: 3px solid var(--text-color);
  border-radius: 12px;
  padding: 24px 16px;
  font-size: 28px; /* 問題文を大きく表示 */
  font-weight: 700;
  text-align: center;
  box-shadow: inset 0 2px 5px rgba(0,0,0,0.05);
  word-wrap: break-word;
}

.question-text-box span.blank-underline {
  border-bottom: 4px solid var(--primary-color);
  padding: 0 10px;
  color: var(--primary-color);
  display: inline-block;
  min-width: 100px;
}

/* 問題A: 4つの選択肢コンテナ */
.choices-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 20px;
}

.btn-choice {
  width: 100%;
  min-height: 60px;
  background-color: #FFFFFF;
  border: 3px solid var(--text-color);
  border-radius: 12px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-color);
  cursor: pointer;
  box-shadow: 0 4px 0 var(--text-color);
  transition: transform 0.1s, box-shadow 0.1s;
  padding: 8px 16px;
  text-align: center;
}

.btn-choice:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 var(--text-color);
}

.btn-choice:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* 問題B: 文字ならべ（四字熟語） */
.yojijukugo-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  margin-bottom: 20px;
}

/* 上部回答スロット */
.answer-slots {
  display: flex;
  gap: 8px;
  justify-content: center;
  width: 100%;
  flex-wrap: wrap; /* 5文字以上の時は折り返せるようにする */
}

.slot {
  width: 58px;
  height: 58px;
  border: 3px dashed var(--text-color);
  border-radius: 8px;
  background-color: #F9EBEA;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  font-weight: bold;
  cursor: pointer;
}

.slot.filled {
  border-style: solid;
  background-color: #FFFFFF;
  box-shadow: 0 3px 0 var(--text-color);
}

/* もどすボタン */
.control-row {
  width: 100%;
  display: flex;
  justify-content: center;
}

.btn-control {
  min-height: 50px;
  padding: 8px 24px;
  border-radius: 8px;
  font-size: 18px;
  font-weight: bold;
  background-color: #F2F3F4;
  border: 2px solid var(--text-color);
  color: var(--text-color);
  cursor: pointer;
  box-shadow: 0 3px 0 var(--text-color);
}

.btn-control:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--text-color);
}

/* 漢字カード（シャッフルされたタイル） */
.kanji-cards {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 10px;
  flex-wrap: wrap; /* 5〜8文字の時にはみ出さないよう折り返す */
  width: 100%;
  padding: 0 10px;
}

.card {
  width: 60px; /* 5文字以上の時に1画面に収まりやすくするため、68pxから60pxへ微調整 */
  height: 60px;
  background-color: #FFFFFF;
  border: 3px solid var(--text-color);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px; /* 32pxから28pxへ微調整 */
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 4px 0 var(--text-color);
  transition: transform 0.1s, box-shadow 0.1s;
}

.card:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 var(--text-color);
}

.card.used {
  opacity: 0.3;
  pointer-events: none;
  transform: none;
  box-shadow: none;
}

/* ヒントボタン */
.hint-row {
  margin-top: 10px;
}

.btn-hint {
  background: none;
  border: 2px dashed var(--secondary-color);
  color: var(--secondary-color);
  font-size: 16px;
  font-weight: bold;
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
}

/* 回答後の解説エリア */
.explanation-area {
  margin-top: 24px;
  padding: 20px;
  border-radius: 12px;
  border: 3px solid var(--text-color);
  background-color: #FFFFFF;
  box-shadow: 0 6px 0 var(--text-color);
}

.explanation-area.correct {
  background-color: var(--correct-bg);
  border-color: var(--correct-color);
  box-shadow: 0 6px 0 var(--correct-color);
}

.explanation-area.incorrect {
  background-color: var(--incorrect-bg);
  border-color: var(--incorrect-color);
  box-shadow: 0 6px 0 var(--incorrect-color);
}

.result-status {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.explanation-area.correct .result-status {
  color: var(--correct-color);
}

.explanation-area.incorrect .result-status {
  color: var(--incorrect-color);
}

.correct-answer-display {
  font-size: 22px;
  font-weight: bold;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}

.explanation-text {
  font-size: 18px;
  line-height: 1.6;
  margin-bottom: 20px;
  color: var(--text-color);
}

.btn-next {
  width: 100%;
  min-height: 60px;
  background-color: var(--primary-color);
  color: #FFFFFF;
  border: 3px solid var(--text-color);
  border-radius: 12px;
  font-size: 20px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 4px 0 var(--text-color);
  display: flex;
  align-items: center;
  justify-content: center;
}

.explanation-area.correct .btn-next {
  background-color: var(--correct-color);
}

.btn-next:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 var(--text-color);
}

/* --- 3. 結果画面 --- */
.result-title {
  font-size: 26px;
  text-align: center;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.result-box {
  background-color: #FFFFFF;
  border: 3px solid var(--text-color);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  box-shadow: 0 6px 0 var(--text-color);
  margin-bottom: 30px;
}

.result-score-emojis {
  font-size: 32px;
  letter-spacing: 6px;
  margin-bottom: 10px;
}

.result-score-text {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 20px;
}

.result-streak {
  border-top: 2px dashed var(--border-color);
  padding-top: 20px;
}

.streak-highlight {
  font-size: 28px;
  font-weight: bold;
  color: var(--primary-color);
  display: block;
  margin-bottom: 6px;
}

.streak-sub {
  font-size: 16px;
  color: var(--text-muted);
}

/* シェアセクション */
.share-section {
  background-color: #EBF5FB;
  border: 2px solid #2980B9;
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  margin-bottom: 30px;
}

.share-lead {
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 15px;
  color: #1B4F72;
}

.btn-share-main {
  background-color: #2980B9;
  color: #FFFFFF;
  border: 3px solid var(--text-color);
  box-shadow: 0 4px 0 var(--text-color);
}

.btn-share-main:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 var(--text-color);
}

.copy-message {
  font-size: 16px;
  color: #196F3D;
  font-weight: bold;
  margin-top: 8px;
}

.share-sns-links {
  display: flex;
  gap: 12px;
  margin-top: 15px;
}

.sns-btn {
  flex: 1;
  min-height: 50px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  color: #FFFFFF;
  border: 2px solid var(--text-color);
  box-shadow: 0 3px 0 var(--text-color);
}

.sns-btn:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--text-color);
}

.x-btn {
  background-color: #000000;
}

.line-btn {
  background-color: #06C755;
}

.result-menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  margin-bottom: 30px;
}

/* --- 広告エリア --- */
.ad-placeholder {
  margin: 20px 0;
  border: 1px dashed var(--text-muted);
  padding: 10px;
  background-color: #F8F9F9;
  border-radius: 8px;
}

.ad-label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  text-align: left;
  margin-bottom: 6px;
}

.ad-mock-box {
  background-color: #FFFFFF;
  border: 2px solid #AEB6BF;
  border-radius: 6px;
  padding: 16px;
  font-size: 16px;
  color: var(--text-muted);
  text-align: center;
  cursor: pointer;
}

.ad-mock-box:hover {
  background-color: #FBFCFC;
}

.ad-mock-box-small {
  background-color: #FFFFFF;
  border: 1px solid #AEB6BF;
  border-radius: 4px;
  padding: 10px;
  font-size: 14px;
  color: var(--text-muted);
  text-align: center;
}

/* --- 4. あそびかたモーダル --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.6);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-content {
  background-color: var(--bg-color);
  width: 100%;
  max-width: 500px;
  border: 3px solid var(--text-color);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.2);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.modal-header-title {
  font-size: 22px;
  color: var(--primary-color);
  text-align: center;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 10px;
}

.modal-slide {
  display: none;
}

.modal-slide.active {
  display: block;
}

.modal-slide h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.slide-desc {
  font-size: 16px;
  color: var(--text-color);
  margin-bottom: 15px;
}

/* 図解用ミニUIのモック */
.mock-ui {
  background-color: #FFFFFF;
  border: 2px solid var(--text-color);
  border-radius: 8px;
  padding: 15px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.mock-question {
  font-size: 20px;
  font-weight: bold;
}

.mock-question span {
  border-bottom: 2px solid var(--primary-color);
  color: var(--primary-color);
  padding: 0 4px;
}

.mock-choices {
  display: flex;
  gap: 10px;
  width: 100%;
}

.mock-choice {
  flex: 1;
  border: 2px solid var(--text-color);
  border-radius: 6px;
  padding: 6px;
  text-align: center;
  font-size: 16px;
  font-weight: bold;
}

.mock-choice.active {
  background-color: var(--primary-color);
  color: #FFFFFF;
  border-color: var(--text-color);
}

.mock-answer-slots {
  display: flex;
  gap: 8px;
}

.mock-answer-slots span {
  width: 36px;
  height: 36px;
  border: 2px solid var(--text-color);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: bold;
}

.mock-cards {
  display: flex;
  gap: 8px;
}

.mock-card {
  width: 36px;
  height: 36px;
  border: 2px solid var(--text-color);
  border-radius: 4px;
  background-color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: bold;
  box-shadow: 0 2px 0 var(--text-color);
}

/* モーダルフッター */
.modal-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  border-top: 1px solid var(--border-color);
  padding-top: 15px;
}

.slide-indicators {
  display: flex;
  gap: 8px;
}

.slide-indicators .dot {
  width: 12px;
  height: 12px;
  background-color: var(--border-color);
  border-radius: 50%;
  cursor: pointer;
}

.slide-indicators .dot.active {
  background-color: var(--primary-color);
}

.btn-modal-action {
  background-color: var(--primary-color);
  color: #FFFFFF;
  border: 2px solid var(--text-color);
  min-height: 50px;
  font-size: 18px;
  box-shadow: 0 3px 0 var(--text-color);
}

.btn-modal-action:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--text-color);
}

.btn-modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  font-weight: bold;
  text-decoration: underline;
  cursor: pointer;
}

/* フッター */
.app-footer {
  margin-top: auto;
  padding: 20px;
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.copyright {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 10px;
}

/* ヘルパークラス */
.hidden {
  display: none !important;
}

/* 視覚補助（色だけでなく記号で結果を表すための設定） */
.correct-indicator {
  color: var(--correct-color);
  font-weight: bold;
}
.incorrect-indicator {
  color: var(--incorrect-color);
  font-weight: bold;
}

/* --- 簡易フッター（広告なし用） --- */
.app-footer-no-ad {
  margin-top: auto;
  padding: 20px;
  background-color: var(--bg-color);
  text-align: center;
  border-top: 1px solid var(--border-color);
}

/* 称号のテキスト */
.badge-text {
  font-size: 20px;
  font-weight: bold;
  color: #D35400;
  margin: 8px 0;
  background-color: #FDF2E9;
  border: 1px solid #F5CBA7;
  padding: 6px 12px;
  border-radius: 8px;
  display: inline-block;
}

/* ニックネーム設定セクション */
.nickname-section {
  background-color: #F4F6F6;
  border: 2px solid #BDC3C7;
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 25px;
  text-align: center;
}

.nickname-label {
  display: block;
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 8px;
  color: var(--text-color);
}

.nickname-input-group {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.nickname-input {
  flex: 1;
  max-width: 250px;
  min-height: 50px;
  border: 2px solid var(--text-color);
  border-radius: 8px;
  padding: 0 12px;
  font-size: 18px;
  font-family: inherit;
}

.btn-save-nickname {
  min-height: 50px;
  background-color: var(--secondary-color);
  color: var(--text-color);
  border: 2px solid var(--text-color);
  border-radius: 8px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  padding: 0 16px;
  box-shadow: 0 3px 0 var(--text-color);
}

.btn-save-nickname:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--text-color);
}

.nickname-status-msg {
  font-size: 14px;
  color: #27AE60;
  font-weight: bold;
  margin-top: 8px;
}

/* --- スタンプ帳画面スタイル --- */
.stamps-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.btn-nav-month {
  min-height: 50px;
  background-color: #FFFFFF;
  border: 2px solid var(--text-color);
  border-radius: 8px;
  font-size: 16px;
  font-weight: bold;
  padding: 0 16px;
  box-shadow: 0 3px 0 var(--text-color);
  cursor: pointer;
}

.btn-nav-month:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--text-color);
}

.month-display {
  font-size: 22px;
  font-weight: bold;
  color: var(--primary-color);
}

.stamps-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  background-color: #FFFFFF;
  border: 3px solid var(--text-color);
  border-radius: 12px;
  padding: 10px;
  margin-bottom: 20px;
  box-shadow: 0 4px 0 var(--text-color);
}

.stamp-cell {
  aspect-ratio: 1 / 1;
  border: 1px solid #E5E7E9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 4px;
  position: relative;
  border-radius: 6px;
  background-color: #FBFCFC;
}

.stamp-cell.empty-day {
  background-color: #F2F3F4;
  border: none;
}

.stamp-cell.header-day {
  font-weight: bold;
  border: none;
  background-color: transparent;
  color: var(--text-muted);
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stamp-cell.header-day.sun {
  color: #C0392B;
}

.stamp-cell.header-day.sat {
  color: #2980B9;
}

.stamp-day-num {
  font-size: 12px;
  align-self: flex-start;
  color: var(--text-muted);
}

.stamp-mark {
  font-size: 24px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: stampPop 0.3s ease-out forwards;
}

.stamp-mark.gold {
  color: #D4AF37;
  filter: drop-shadow(0 2px 2px rgba(0,0,0,0.15));
}

.stamp-mark.silver {
  color: #BDC3C7;
  filter: drop-shadow(0 2px 2px rgba(0,0,0,0.15));
}

@keyframes stampPop {
  0% { transform: scale(3); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.stamps-legend {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 25px;
  font-size: 16px;
  font-weight: bold;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.stamp-gold-mini {
  color: #D4AF37;
  font-size: 20px;
}

.stamp-silver-mini {
  color: #BDC3C7;
  font-size: 20px;
}

.stamps-actions {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

/* --- 賞状（表彰状）スタイル --- */
.certificate-container {
  background-color: #FDF2E9; /* 和風の鳥の子色 */
  width: 95%;
  max-width: 550px;
  border: 4px double #D4AF37;
  border-radius: 12px;
  padding: 8px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.certificate-border {
  border: 2px solid #D4AF37;
  padding: 16px;
  border-radius: 8px;
  background-color: #FDFEF9; /* 和紙風の白 */
}

.certificate-inner {
  border: 1px solid rgba(212, 175, 55, 0.4);
  padding: 24px 16px;
  border-radius: 4px;
  text-align: center;
  background-color: #FDFEF9;
}

.cert-header {
  font-family: 'Georgia', 'Yu Mincho', 'Hiragino Mincho ProN', serif;
  font-size: 36px;
  font-weight: 700;
  color: #111111;
  margin-bottom: 20px;
  letter-spacing: 12px;
  text-indent: 12px;
}

.cert-target {
  font-size: 22px;
  font-weight: bold;
  border-bottom: 2px solid #111111;
  display: inline-block;
  padding-bottom: 4px;
  margin-bottom: 20px;
  max-width: 80%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cert-body {
  font-size: 18px;
  line-height: 1.8;
  color: #2c3e50;
  text-align: left;
  margin-bottom: 24px;
  font-family: 'Yu Mincho', 'Hiragino Mincho ProN', serif;
}

.cert-body strong {
  font-size: 26px;
  color: #C0392B;
  border-bottom: 2px dashed #C0392B;
  padding: 0 4px;
}

.cert-date {
  font-size: 16px;
  text-align: right;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.cert-footer {
  font-size: 16px;
  text-align: right;
  font-weight: bold;
  color: #111111;
}

.cert-actions {
  display: flex;
  justify-content: center;
}

.btn-cert-close {
  min-width: 150px;
  min-height: 50px;
  background-color: #D4AF37;
  color: #FFFFFF;
  border: 2px solid var(--text-color);
  border-radius: 8px;
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 4px 0 var(--text-color);
}

.btn-cert-close:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 var(--text-color);
}