/* -------------------------------------------------------------
   三相占い 公式紹介サイト スタイルシート (style.css)
   デザインシステム: 和モダン・ミニマリズム・設計思想の明晰さ
------------------------------------------------------------- */

/* 変数定義 */
:root {
    --color-bg-base: #faf8f5;
    --color-bg-card-back: #f0ede6;
    --color-bg-sub: #f3f0e8;
    --color-text-main: #2b2b2b;
    --color-text-sub: #5c5c5c;
    --color-border: #d3cfc4;
    --color-primary: #8a785d;
    --color-primary-hover: #6e5e47;
    
    /* 吉平凶の三相カラー */
    --color-yoshi: #c93b3b;      /* 朱赤 */
    --color-hei: #3b62c9;        /* 藍青 */
    --color-kyou: #c9933b;       /* 枯黄・金茶 */

    /* フォントファミリー */
    --font-serif: 'Noto Serif JP', serif;
    --font-sans: 'Outfit', 'Helvetica Neue', Arial, sans-serif;
    
    /* シャドウとトランジション */
    --shadow-sm: 0 2px 8px rgba(43, 43, 43, 0.05);
    --shadow-md: 0 8px 24px rgba(43, 43, 43, 0.08);
    --shadow-lg: 0 16px 40px rgba(43, 43, 43, 0.12);
    --transition-smooth: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-fast: all 0.2s ease;
}

/* ベースリセット */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--color-bg-base);
    color: var(--color-text-main);
    font-family: var(--font-serif);
    -webkit-font-smoothing: antialiased;
}

body {
    line-height: 1.8;
}

/* タイポグラフィ */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.4;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-fast);
}

/* 共通コンポーネント */
.section-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 100px 24px;
}

.section-title {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 16px;
    position: relative;
    padding-bottom: 20px;
}

.section-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 1px;
    background-color: var(--color-border);
}

.section-subtitle {
    font-size: 1.1rem;
    text-align: center;
    color: var(--color-text-sub);
    margin-bottom: 60px;
    font-weight: 300;
}

/* ボタン */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-family: var(--font-serif);
}

.btn-primary {
    background-color: var(--color-text-main);
    color: var(--color-bg-base);
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-main);
}

.btn-secondary:hover {
    background-color: var(--color-bg-sub);
    border-color: var(--color-text-main);
    transform: translateY(-2px);
}

.btn-disabled {
    display: inline-block;
    padding: 14px 32px;
    font-size: 0.95rem;
    color: var(--color-text-sub);
    background-color: var(--color-bg-sub);
    border: 1px dashed var(--color-border);
    border-radius: 4px;
    cursor: not-allowed;
}

/* バッジ */
.badge {
    display: inline-block;
    padding: 4px 12px;
    font-size: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    color: var(--color-text-sub);
    margin-bottom: 12px;
}

.badge-red { background-color: rgba(201, 59, 59, 0.1); color: var(--color-yoshi); border-color: var(--color-yoshi); }
.badge-blue { background-color: rgba(59, 98, 129, 0.1); color: var(--color-hei); border-color: var(--color-hei); }
.badge-yellow { background-color: rgba(201, 147, 59, 0.1); color: var(--color-kyou); border-color: var(--color-kyou); }

/* ヘッダー */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(250, 248, 245, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(211, 207, 196, 0.4);
    transition: var(--transition-fast);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 0.1em;
}

.nav-menu {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-menu a {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-text-sub);
}

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

.nav-menu a.nav-cta {
    background-color: var(--color-text-main);
    color: var(--color-bg-base);
    padding: 8px 18px;
    border-radius: 4px;
}

.nav-menu a.nav-cta:hover {
    background-color: var(--color-primary-hover);
}

/* ヒーローセクション */
.hero-section {
    min-height: 100vh;
    padding: 140px 24px 80px;
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.hero-content {
    flex: 1;
    max-width: 580px;
}

.hero-sub {
    font-family: var(--font-sans);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.hero-title {
    font-size: 3.4rem;
    line-height: 1.25;
    margin-bottom: 24px;
    font-weight: 800;
}

.hero-title .highlight {
    color: var(--color-primary);
    font-weight: 800;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--color-text-sub);
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    height: 450px;
}

/* ヒーロー内の3枚カード装飾スタック */
.visual-card-stack {
    position: relative;
    width: 260px;
    height: 380px;
}

.visual-card {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-bg-base);
    transition: var(--transition-smooth);
    user-select: none;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.card-yoshi {
    background-color: var(--color-yoshi);
    transform: rotate(-10deg) translate(-20px, 0);
    z-index: 1;
    animation: float-1 8s infinite ease-in-out;
}

.card-hei {
    background-color: var(--color-hei);
    transform: rotate(2deg) translate(0, -10px);
    z-index: 2;
    animation: float-2 7s infinite ease-in-out;
}

.card-kyou {
    background-color: var(--color-kyou);
    transform: rotate(12deg) translate(25px, 15px);
    z-index: 3;
    animation: float-3 9s infinite ease-in-out;
}

@keyframes float-1 {
    0%, 100% { transform: rotate(-10deg) translate(-20px, 0); }
    50% { transform: rotate(-8deg) translate(-15px, -15px); }
}
@keyframes float-2 {
    0%, 100% { transform: rotate(2deg) translate(0, -10px); }
    50% { transform: rotate(0deg) translate(5px, 5px); }
}
@keyframes float-3 {
    0%, 100% { transform: rotate(12deg) translate(25px, 15px); }
    50% { transform: rotate(15deg) translate(20px, 5px); }
}

/* 特徴セクション */
.about-section {
    background-color: var(--color-bg-sub);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 20px;
}

.feature-card {
    background-color: var(--color-bg-base);
    padding: 48px 32px;
    border-radius: 6px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    border: 1px solid rgba(211, 207, 196, 0.3);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-bg-base);
    margin-bottom: 28px;
}

.icon-red { background-color: var(--color-yoshi); }
.icon-blue { background-color: var(--color-hei); }
.icon-yellow { background-color: var(--color-kyou); }

.feature-card h3 {
    font-size: 1.35rem;
    margin-bottom: 16px;
    font-weight: 600;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--color-text-sub);
    text-align: justify;
}

/* 一枚体験セクション */
.interactive-section {
    background-color: var(--color-bg-base);
    overflow: hidden;
}

.game-board {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 40px;
}

.cards-container {
    display: flex;
    gap: 40px;
    justify-content: center;
    margin-bottom: 50px;
    min-height: 280px;
    width: 100%;
}

/* 3Dフリップカードの構造 */
.flip-card {
    perspective: 1000px;
    width: 180px;
    height: 260px;
    cursor: pointer;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: 1px solid var(--color-border);
}

/* カードの裏面 (和風の幾何学模様デザインをCSSで構築) */
.flip-card-front {
    background-color: var(--color-bg-card-back);
    background-image: 
        linear-gradient(90deg, transparent 50%, rgba(138, 120, 93, 0.1) 50%),
        linear-gradient(rgba(138, 120, 93, 0.1) 50%, transparent 50%);
    background-size: 16px 16px;
    color: var(--color-primary);
}

.card-pattern-mark {
    width: 44px;
    height: 44px;
    border: 1px solid var(--color-primary);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    background-color: var(--color-bg-base);
}

/* カードの表面 (吉平凶) */
.flip-card-back {
    transform: rotateY(180deg);
    color: var(--color-bg-base);
    font-size: 2.2rem;
    font-weight: 800;
    padding: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* それぞれの色と文字 */
.flip-card.card-yoshi-val .flip-card-back {
    background-color: var(--color-yoshi);
}
.flip-card.card-hei-val .flip-card-back {
    background-color: var(--color-hei);
}
.flip-card.card-kyou-val .flip-card-back {
    background-color: var(--color-kyou);
    color: var(--color-text-main);
}

.card-val-en {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    margin-top: 8px;
    opacity: 0.85;
}

.card-val-phrase {
    font-size: 0.7rem;
    font-weight: 300;
    margin-top: auto;
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    padding-top: 12px;
    width: 100%;
    text-align: center;
}

/* フリップしていないカードのホバーイフェクト */
.flip-card:not(.flipped):hover .flip-card-inner {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
}

/* 他のカードがめくられた際、選ばれなかったカードを少し暗くする */
.cards-container.has-choice .flip-card:not(.flipped) {
    opacity: 0.4;
    cursor: default;
    pointer-events: none;
}

/* 結果表示エリア */
.result-display {
    max-width: 600px;
    width: 100%;
    background-color: var(--color-bg-sub);
    border-radius: 6px;
    padding: 40px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition-smooth);
    opacity: 1;
    transform: translateY(0);
}

.result-display.hidden {
    display: none;
    opacity: 0;
    transform: translateY(20px);
}

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

.result-title {
    font-size: 1.8rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.result-text {
    font-size: 1.05rem;
    color: var(--color-text-main);
    margin-bottom: 24px;
    text-align: justify;
    line-height: 1.9;
}

.result-footnote {
    font-size: 0.8rem;
    color: var(--color-text-sub);
    margin-bottom: 30px;
}

/* 基本手順セクション */
.steps-section {
    background-color: var(--color-bg-sub);
}

.steps-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto 60px;
}

.steps-timeline::before {
    content: "";
    position: absolute;
    top: 0;
    left: 40px;
    height: 100%;
    width: 1px;
    background-color: var(--color-border);
}

.step-item {
    position: relative;
    display: flex;
    gap: 40px;
    margin-bottom: 50px;
}

.step-item:last-child {
    margin-bottom: 0;
}

.step-number {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--color-bg-base);
    border: 1px solid var(--color-border);
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 1.2rem;
    color: var(--color-primary);
    z-index: 2;
    flex-shrink: 0;
}

.step-content {
    padding-top: 18px;
}

.step-content h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.step-content p {
    color: var(--color-text-sub);
    font-size: 0.95rem;
}

/* 代用トランプブロック */
.card-alternatives {
    max-width: 800px;
    margin: 60px auto 0;
    background-color: var(--color-bg-base);
    padding: 40px;
    border-radius: 6px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(211, 207, 196, 0.5);
}

.card-alternatives h3 {
    font-size: 1.4rem;
    text-align: center;
    margin-bottom: 16px;
}

.card-alternatives p {
    font-size: 0.95rem;
    color: var(--color-text-sub);
    text-align: center;
    margin-bottom: 30px;
}

.alternative-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.alternative-table th, .alternative-table td {
    padding: 14px 20px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.alternative-table th {
    font-weight: 600;
    color: var(--color-text-sub);
    font-size: 0.9rem;
}

.alternative-table td {
    font-size: 0.95rem;
}

/* 考案背景セクション */
.origin-section {
    background-color: var(--color-bg-base);
}

.origin-grid {
    display: flex;
    gap: 60px;
    align-items: center;
}

.origin-text {
    flex: 1.2;
}

.origin-text p {
    color: var(--color-text-sub);
    margin-bottom: 24px;
    font-size: 1.05rem;
}

.narrator-note {
    background-color: var(--color-bg-sub);
    padding: 30px;
    border-radius: 4px;
    border-left: 3px solid var(--color-primary);
    margin-top: 40px;
}

.narrator-note h4 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.narrator-note p {
    font-size: 0.9rem;
    color: var(--color-text-sub);
    margin-bottom: 0;
}

.origin-visual {
    flex: 0.8;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 幾何学デザイン */
.geom-design {
    position: relative;
    width: 280px;
    height: 280px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.circle {
    position: absolute;
    border-radius: 50%;
    border: 1px dashed var(--color-border);
}

.circle-outer {
    width: 280px;
    height: 280px;
    animation: rotate-clockwise 20s infinite linear;
}

.circle-inner {
    width: 180px;
    height: 180px;
    border-style: solid;
    animation: rotate-counter-clockwise 15s infinite linear;
}

.line {
    position: absolute;
    background-color: var(--color-border);
}

.line-vertical {
    width: 1px;
    height: 320px;
}

.line-horizontal {
    width: 320px;
    height: 1px;
}

.dots-container {
    position: absolute;
    display: flex;
    gap: 30px;
    z-index: 3;
}

.dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
}

.dot-red { background-color: var(--color-yoshi); }
.dot-blue { background-color: var(--color-hei); }
.dot-yellow { background-color: var(--color-kyou); }

@keyframes rotate-clockwise {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
@keyframes rotate-counter-clockwise {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(-360deg); }
}

/* FAQセクション */
.faq-section {
    background-color: var(--color-bg-sub);
}

.promise-box {
    background-color: var(--color-bg-base);
    padding: 40px;
    border-radius: 6px;
    border: 1px solid var(--color-border);
    margin-bottom: 60px;
    box-shadow: var(--shadow-sm);
}

.promise-box h3 {
    font-size: 1.4rem;
    margin-bottom: 24px;
    color: var(--color-yoshi);
    text-align: center;
}

.promise-box ul {
    list-style: none;
    max-width: 800px;
    margin: 0 auto;
}

.promise-box li {
    font-size: 0.95rem;
    margin-bottom: 16px;
    padding-left: 24px;
    position: relative;
    color: var(--color-text-sub);
}

.promise-box li::before {
    content: "・";
    position: absolute;
    left: 0;
    color: var(--color-yoshi);
    font-weight: 800;
}

.promise-box li strong {
    color: var(--color-text-main);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 40px;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 30px;
}

.faq-item:last-child {
    margin-bottom: 0;
    border-bottom: none;
}

.faq-item h4 {
    font-size: 1.15rem;
    margin-bottom: 12px;
    font-weight: 600;
}

.faq-item p {
    font-size: 0.95rem;
    color: var(--color-text-sub);
    text-align: justify;
}

/* 書籍紹介セクション */
.books-section {
    background-color: var(--color-bg-base);
}

.books-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 40px;
}

.book-card-item, .cards-intro-item {
    display: flex;
    gap: 40px;
    background-color: var(--color-bg-sub);
    padding: 40px;
    border-radius: 6px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

/* 本の3D風立体モックアップをCSSで作成 */
.book-mockup {
    position: relative;
    width: 140px;
    height: 200px;
    background-color: #f7f3eb;
    border-radius: 2px 6px 6px 2px;
    box-shadow: 
        -5px 5px 15px rgba(0,0,0,0.1),
        0 1px 2px rgba(0,0,0,0.05);
    flex-shrink: 0;
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.book-spine {
    position: absolute;
    left: 0;
    top: 0;
    width: 10px;
    height: 100%;
    background-color: rgba(43,43,43,0.05);
    border-right: 1px solid rgba(0,0,0,0.1);
    z-index: 3;
}

.book-cover {
    height: 100%;
    padding: 20px 14px 20px 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background-color: var(--color-bg-base);
}

.book-header {
    font-size: 0.65rem;
    color: var(--color-text-sub);
    letter-spacing: 0.1em;
}

.book-title {
    font-size: 1.4rem;
    font-weight: 800;
    line-height: 1.3;
    color: var(--color-text-main);
    margin: auto 0;
}

.book-author {
    font-size: 0.75rem;
    color: var(--color-primary);
    text-align: right;
}

/* 専用札のグラフィックプレビュー */
.cards-preview-visual {
    width: 140px;
    height: 200px;
    position: relative;
    flex-shrink: 0;
}

.card-preview {
    position: absolute;
    width: 90px;
    height: 130px;
    border-radius: 4px;
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--color-bg-base);
    font-size: 1.4rem;
    font-weight: 800;
    border: 1px solid rgba(255,255,255,0.1);
}

.card-preview-red {
    background-color: var(--color-yoshi);
    left: 0;
    top: 10px;
    transform: rotate(-12deg);
    z-index: 1;
}

.card-preview-blue {
    background-color: var(--color-hei);
    left: 24px;
    top: 30px;
    transform: rotate(2deg);
    z-index: 2;
}

.card-preview-yellow {
    background-color: var(--color-kyou);
    left: 48px;
    top: 20px;
    transform: rotate(15deg);
    z-index: 3;
}

.book-info {
    display: flex;
    flex-direction: column;
}

.book-info h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.book-info p {
    font-size: 0.9rem;
    color: var(--color-text-sub);
    margin-bottom: auto;
}

.book-actions {
    margin-top: 24px;
}

/* フッター */
.main-footer {
    background-color: var(--color-text-main);
    color: var(--color-bg-base);
    padding: 60px 24px;
    font-size: 0.85rem;
    font-family: var(--font-sans);
}

.footer-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    opacity: 0.7;
}

.designer-credit {
    opacity: 0.5;
}

/* -------------------------------------------------------------
   レスポンシブデザイン (メディアクエリ)
------------------------------------------------------------- */
@media (max-width: 992px) {
    .hero-section {
        flex-direction: column-reverse;
        padding-top: 100px;
        text-align: center;
        gap: 30px;
        min-height: auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .books-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .origin-grid {
        flex-direction: column;
        gap: 45px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none; /* シンプルにするためSPナビは一旦非表示にするか折りたたむ設計 */
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .hero-title {
        font-size: 2.4rem;
    }
    
    .steps-timeline::before {
        left: 20px;
    }
    
    .step-item {
        gap: 20px;
    }
    
    .step-number {
        width: 44px;
        height: 44px;
        font-size: 0.9rem;
    }
    
    .step-content {
        padding-top: 6px;
    }
    
    .book-card-item, .cards-intro-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .cards-container {
        gap: 20px;
    }

    .flip-card {
        width: 100px;
        height: 150px;
    }

    .flip-card-back {
        font-size: 1.4rem;
        padding: 10px;
    }

    .card-val-en {
        font-size: 0.7rem;
    }

    .card-val-phrase {
        display: none; /* SPでは非表示にしてスッキリさせる */
    }

    .card-pattern-mark {
        width: 32px;
        height: 32px;
        font-size: 0.6rem;
    }
}

/* 一枚体験用の文字カラー定義 */
.text-yoshi { color: var(--color-yoshi); }
.text-hei { color: var(--color-hei); }
.text-kyou { color: var(--color-kyou); }

/* フォーカスリングのカスタマイズ (アクセシビリティ向上) */
.flip-card:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: 8px;
}