/* ============================================
   yukkuri-exosome.link 共通スタイル
   ============================================ */

:root {
    /* カラー（高級トーン版） */
    --color-primary: #c9899a;        /* くすみローズ（りんく系） */
    --color-secondary: #c9a96e;      /* シャンパンゴールド（こん太系） */
    --color-tertiary: #a78a6b;       /* モカブラウン（たぬ姉系） */
    --color-accent: #8eb4c7;         /* スモークブルー */

    --color-bg: #faf6f1;             /* オフホワイト */
    --color-bg-card: #ffffff;
    --color-bg-section: #f4ede4;     /* 上品なベージュ */

    --color-text: #2e2622;           /* ほぼ黒に近いブラウン */
    --color-text-muted: #8a7d76;     /* ミューテッドブラウン */
    --color-border: #ebe0d0;         /* やわらかいベージュ */

    /* りんく(やさしい) */
    --rink-bg: #f5e6ea;
    --rink-border: #c9899a;

    /* こん太(あたたかい) */
    --konta-bg: #f4ecd9;
    --konta-border: #c9a96e;

    /* たぬ姉(おちついた) */
    --tanunee-bg: #ede3d5;
    --tanunee-border: #a78a6b;

    /* シャドウ・角丸（上品版） */
    --shadow-sm: 0 1px 3px rgba(46, 38, 34, 0.04), 0 1px 2px rgba(46, 38, 34, 0.03);
    --shadow-md: 0 4px 16px rgba(46, 38, 34, 0.06), 0 2px 6px rgba(46, 38, 34, 0.04);
    --shadow-lg: 0 12px 40px rgba(46, 38, 34, 0.1), 0 4px 12px rgba(46, 38, 34, 0.05);
    --radius-sm: 6px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-pill: 999px;

    /* フォント */
    --font-base: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
    --font-serif: 'Noto Serif JP', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
    --font-size-base: 16px;
    --line-height: 1.8;

    /* 余白 */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 40px;
    --space-xl: 64px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-bg);
    background-image:
        radial-gradient(circle at 10% 20%, rgba(255, 143, 163, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(126, 200, 227, 0.05) 0%, transparent 40%);
    background-attachment: fixed;
    min-height: 100vh;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: opacity 0.2s;
}

a:hover {
    opacity: 0.7;
}

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

/* ============================================
   レイアウト
   ============================================ */

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.container--narrow {
    max-width: 720px;
}

/* ============================================
   ヘッダー
   ============================================ */

.site-header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    max-width: 960px;
    margin: 0 auto;
}

.site-logo {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.site-logo__icon {
    width: 32px;
    height: 32px;
}

.site-nav {
    display: flex;
    gap: var(--space-sm);
    list-style: none;
}

.site-nav a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

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

.site-header__sister {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.2s;
    box-shadow: var(--shadow-sm);
    background: #fff;
}

.site-header__sister:hover {
    transform: scale(1.1);
    opacity: 1;
}

.site-header__sister img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

@media (max-width: 640px) {
    .site-nav {
        gap: var(--space-xs);
    }
    .site-nav a {
        font-size: 0.8rem;
    }
    .site-header__sister {
        width: 32px;
        height: 32px;
    }
}

@media (max-width: 480px) {
    .site-header__sister {
        display: none;
    }
}

/* ============================================
   ヒーローセクション
   ============================================ */

.hero {
    padding: var(--space-lg) var(--space-md) var(--space-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(ellipse at top, rgba(168, 213, 226, 0.25) 0%, transparent 60%),
        radial-gradient(ellipse at bottom right, rgba(255, 191, 211, 0.2) 0%, transparent 60%),
        radial-gradient(ellipse at bottom left, rgba(199, 175, 226, 0.18) 0%, transparent 60%),
        linear-gradient(180deg, #fffaf3 0%, #f6f1ff 100%);
    min-height: 600px;
}

.hero__inner {
    position: relative;
    z-index: 2;
}

/* 中央の細胞ビジュアル */
.hero__cell {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 480px;
    height: 480px;
    z-index: 0;
    pointer-events: none;
    opacity: 0.4;
}

.hero__cell-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%,
        rgba(255, 200, 220, 0.9) 0%,
        rgba(180, 220, 240, 0.7) 50%,
        rgba(126, 200, 227, 0.5) 100%);
    box-shadow:
        0 0 60px rgba(126, 200, 227, 0.4),
        inset -10px -10px 30px rgba(0, 0, 0, 0.06),
        inset 10px 10px 30px rgba(255, 255, 255, 0.5);
    animation: cellPulse 4s ease-in-out infinite;
}

.hero__cell-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border-radius: 50%;
    border: 2px dashed rgba(126, 200, 227, 0.35);
    transform: translate(-50%, -50%);
}

.hero__cell-ring--1 {
    width: 240px;
    height: 240px;
    animation: cellSpin 30s linear infinite;
}

.hero__cell-ring--2 {
    width: 340px;
    height: 340px;
    border-color: rgba(255, 143, 163, 0.25);
    animation: cellSpin 45s linear infinite reverse;
}

.hero__cell-ring--3 {
    width: 460px;
    height: 460px;
    border-color: rgba(255, 179, 71, 0.2);
    animation: cellSpin 60s linear infinite;
}

@keyframes cellPulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 0 0 60px rgba(126, 200, 227, 0.4),
            inset -10px -10px 30px rgba(0, 0, 0, 0.06),
            inset 10px 10px 30px rgba(255, 255, 255, 0.5);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.08);
        box-shadow: 0 0 80px rgba(126, 200, 227, 0.6),
            inset -10px -10px 30px rgba(0, 0, 0, 0.06),
            inset 10px 10px 30px rgba(255, 255, 255, 0.6);
    }
}

@keyframes cellSpin {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* 浮遊するエクソソーム粒子 */
.hero__exosomes {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

.exosome {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%,
        rgba(255, 255, 255, 0.95) 0%,
        rgba(173, 216, 230, 0.6) 40%,
        rgba(126, 200, 227, 0.3) 100%);
    box-shadow:
        0 0 12px rgba(126, 200, 227, 0.4),
        inset -2px -2px 4px rgba(0, 0, 0, 0.05);
}

.exosome::before {
    content: "";
    position: absolute;
    top: 18%;
    left: 22%;
    width: 30%;
    height: 30%;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    filter: blur(2px);
}

.exosome--1  { width: 22px; height: 22px; top: 10%;  left: 8%;  animation: exoFloat 14s ease-in-out infinite; }
.exosome--2  { width: 14px; height: 14px; top: 25%;  left: 88%; animation: exoFloat 11s ease-in-out infinite 1s; }
.exosome--3  { width: 30px; height: 30px; top: 60%;  left: 5%;  animation: exoFloat 16s ease-in-out infinite 2s; background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.95) 0%, rgba(255, 192, 203, 0.6) 40%, rgba(255, 143, 163, 0.3) 100%); box-shadow: 0 0 12px rgba(255, 143, 163, 0.4); }
.exosome--4  { width: 18px; height: 18px; top: 80%;  left: 92%; animation: exoFloat 13s ease-in-out infinite 0.5s; }
.exosome--5  { width: 26px; height: 26px; top: 15%;  left: 70%; animation: exoFloat 17s ease-in-out infinite 1.5s; background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.95) 0%, rgba(255, 224, 178, 0.6) 40%, rgba(255, 179, 71, 0.3) 100%); box-shadow: 0 0 12px rgba(255, 179, 71, 0.4); }
.exosome--6  { width: 12px; height: 12px; top: 50%;  left: 95%; animation: exoFloat 12s ease-in-out infinite 0.8s; }
.exosome--7  { width: 20px; height: 20px; top: 40%;  left: 12%; animation: exoFloat 15s ease-in-out infinite 2.5s; }
.exosome--8  { width: 16px; height: 16px; top: 70%;  left: 25%; animation: exoFloat 10s ease-in-out infinite 1.2s; background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.95) 0%, rgba(255, 192, 203, 0.6) 40%, rgba(255, 143, 163, 0.3) 100%); box-shadow: 0 0 12px rgba(255, 143, 163, 0.4); }
.exosome--9  { width: 24px; height: 24px; top: 5%;   left: 45%; animation: exoFloat 18s ease-in-out infinite 0.3s; }
.exosome--10 { width: 14px; height: 14px; top: 90%;  left: 60%; animation: exoFloat 13s ease-in-out infinite 1.8s; background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.95) 0%, rgba(255, 224, 178, 0.6) 40%, rgba(255, 179, 71, 0.3) 100%); box-shadow: 0 0 12px rgba(255, 179, 71, 0.4); }
.exosome--11 { width: 28px; height: 28px; top: 32%;  left: 30%; animation: exoFloat 19s ease-in-out infinite 2.2s; }
.exosome--12 { width: 16px; height: 16px; top: 55%;  left: 78%; animation: exoFloat 11s ease-in-out infinite 0.6s; }

@keyframes exoFloat {
    0%, 100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.7;
    }
    33% {
        transform: translate(20px, -25px) scale(1.1);
        opacity: 1;
    }
    66% {
        transform: translate(-15px, 15px) scale(0.95);
        opacity: 0.8;
    }
}

/* モバイルは細胞を少し小さく */
@media (max-width: 640px) {
    .hero__cell {
        width: 320px;
        height: 320px;
    }
    .hero__cell-core {
        width: 100px;
        height: 100px;
    }
    .hero__cell-ring--1 { width: 170px; height: 170px; }
    .hero__cell-ring--2 { width: 240px; height: 240px; }
    .hero__cell-ring--3 { width: 310px; height: 310px; }

    .exosome { transform: scale(0.7); }
}

/* アニメーションを減らす設定の人向け */
@media (prefers-reduced-motion: reduce) {
    .hero__cell-core,
    .hero__cell-ring,
    .exosome,
    .hero__character {
        animation: none !important;
    }
}

.hero__kimito-badge {
    margin-bottom: var(--space-md);
    display: flex;
    justify-content: center;
}

.hero__kimito-link {
    display: inline-block;
    transition: transform 0.3s;
    text-decoration: none;
}

.hero__kimito-link:hover {
    transform: translateY(-3px);
    opacity: 1;
}

.hero__kimito-logo {
    width: 220px;
    height: auto;
    max-width: 100%;
    filter: drop-shadow(0 4px 8px rgba(31, 64, 117, 0.12));
}

@media (max-width: 480px) {
    .hero__kimito-logo {
        width: 180px;
    }
}

.hero__title {
    font-size: clamp(1.8rem, 5vw, 2.8rem);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    line-height: 1.4;
    position: relative;
    z-index: 2;
    text-shadow: 0 2px 16px rgba(255, 255, 255, 0.7);
}

.hero__subtitle {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    position: relative;
    z-index: 2;
    text-shadow: 0 2px 8px rgba(255, 255, 255, 0.6);
}

.hero__kimito-badge {
    position: relative;
    z-index: 2;
}

.hero__characters {
    position: relative;
    z-index: 2;
}

.hero__characters {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: var(--space-sm);
    margin: var(--space-md) 0;
    flex-wrap: wrap;
}

.hero__character {
    width: 120px;
    transition: transform 0.3s;
    cursor: pointer;
}

.hero__character:hover {
    transform: translateY(-8px) scale(1.05);
}

.hero__character img {
    width: 100%;
    filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.1));
}

.hero__character-name {
    text-align: center;
    margin-top: 8px;
    font-weight: 700;
    font-size: 0.9rem;
}

@media (max-width: 480px) {
    .hero__character {
        width: 90px;
    }
}

/* ============================================
   会話バブル（記事内対話）
   ============================================ */

.dialog {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin: var(--space-lg) 0;
}

.dialog__turn {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
}

.dialog__turn--right {
    flex-direction: row-reverse;
}

.dialog__avatar {
    width: 64px;
    height: 64px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--color-bg-card);
    padding: 4px;
    box-shadow: var(--shadow-sm);
}

.dialog__avatar img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.dialog__body {
    flex: 1;
    max-width: calc(100% - 80px);
}

.dialog__name {
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--color-text-muted);
}

.dialog__bubble {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    box-shadow: var(--shadow-sm);
    position: relative;
    line-height: 1.7;
}

.dialog__bubble p {
    margin-bottom: 0.6em;
}

.dialog__bubble p:last-child {
    margin-bottom: 0;
}

/* キャラ別カラー */
.dialog__turn--rink .dialog__bubble {
    background: var(--rink-bg);
    border-left: 4px solid var(--rink-border);
}

.dialog__turn--konta .dialog__bubble {
    background: var(--konta-bg);
    border-left: 4px solid var(--konta-border);
}

.dialog__turn--tanunee .dialog__bubble {
    background: var(--tanunee-bg);
    border-left: 4px solid var(--tanunee-border);
}

.dialog__turn--right .dialog__bubble {
    border-left: none;
}

.dialog__turn--right.dialog__turn--rink .dialog__bubble {
    border-right: 4px solid var(--rink-border);
}

.dialog__turn--right.dialog__turn--konta .dialog__bubble {
    border-right: 4px solid var(--konta-border);
}

.dialog__turn--right.dialog__turn--tanunee .dialog__bubble {
    border-right: 4px solid var(--tanunee-border);
}

/* ============================================
   カード
   ============================================ */

.section {
    padding: var(--space-xl) 0;
}

.section__title {
    font-size: 1.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-md);
}

.section__subtitle {
    text-align: center;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
}

.card {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.card__inner {
    padding: var(--space-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card__icon {
    font-size: 2.4rem;
    margin-bottom: var(--space-xs);
}

.card__title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.card__desc {
    color: var(--color-text-muted);
    font-size: 0.92rem;
    flex: 1;
    margin-bottom: var(--space-sm);
}

.card__cta {
    display: inline-block;
    color: var(--color-primary);
    font-weight: 700;
    font-size: 0.9rem;
}

/* アプリ的カード（仕掛けへのリンク） */
.app-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-md);
}

.app-card {
    background: linear-gradient(135deg, #ffe4ec 0%, #fff0d6 100%);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    color: var(--color-text);
    display: block;
    box-shadow: var(--shadow-sm);
}

.app-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    opacity: 1;
}

.app-card__emoji {
    font-size: 3rem;
    margin-bottom: var(--space-xs);
}

.app-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.app-card__desc {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.app-card:nth-child(2) {
    background: linear-gradient(135deg, #fff0d6 0%, #d8f3ff 100%);
}

.app-card:nth-child(3) {
    background: linear-gradient(135deg, #f4e8d8 0%, #ffe4ec 100%);
}

.app-card:nth-child(4) {
    background: linear-gradient(135deg, #d8f3ff 0%, #f4e8d8 100%);
}

/* ============================================
   ボタン
   ============================================ */

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--radius-pill);
    font-weight: 700;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    font-family: inherit;
    text-align: center;
}

.btn--primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    opacity: 1;
    color: #fff;
}

.btn--secondary {
    background: var(--color-bg-card);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn--large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* ============================================
   記事本文
   ============================================ */

.article {
    padding: var(--space-lg) 0;
}

.article__header {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.article__category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-accent);
    color: #fff;
    border-radius: var(--radius-pill);
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.article__title {
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    font-weight: 700;
    line-height: 1.4;
}

.article__lead {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    margin: var(--space-md) 0;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-section);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-accent);
}

.article__section {
    margin: var(--space-lg) 0;
}

.article__h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: var(--space-lg) 0 var(--space-sm);
    padding-bottom: 8px;
    border-bottom: 3px solid var(--color-primary);
    display: inline-block;
}

.article__h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin: var(--space-md) 0 var(--space-xs);
    color: var(--color-primary);
}

.article p {
    margin-bottom: 1em;
}

.article ul,
.article ol {
    margin: 0 0 1em 1.5em;
}

.article li {
    margin-bottom: 0.5em;
}

.article__note {
    padding: var(--space-sm) var(--space-md);
    background: #fff8e1;
    border-radius: var(--radius-sm);
    border-left: 4px solid #ffc107;
    margin: var(--space-md) 0;
    font-size: 0.95rem;
}

.article__source {
    margin-top: var(--space-lg);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-section);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* 関連記事 */
.related {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.related__title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    text-align: center;
}

/* ============================================
   フッター
   ============================================ */

.site-footer {
    background: var(--color-bg-section);
    padding: var(--space-lg) var(--space-md);
    margin-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.site-footer__inner {
    max-width: 960px;
    margin: 0 auto;
    text-align: center;
}

.site-footer__sister {
    background: #fff;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.site-footer__sister-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    letter-spacing: 0.15em;
    margin-bottom: var(--space-xs);
    font-weight: 700;
}

.site-footer__sister-link {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    transition: transform 0.2s;
}

.site-footer__sister-link:hover {
    transform: translateY(-2px);
    opacity: 1;
}

.site-footer__sister-link img {
    max-width: 240px;
    width: 100%;
    height: auto;
    margin: 0 auto;
}

.site-footer__sister-desc {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
    line-height: 1.6;
}

.site-footer__copyright small a {
    color: var(--color-text-muted);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
}

.site-footer__disclaimer {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-sm);
    line-height: 1.7;
    text-align: left;
}

.site-footer__nav {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
}

.site-footer__nav a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.site-footer__copyright {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ============================================
   アニメーション
   ============================================ */

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.fade-up {
    animation: fadeUp 0.6s ease-out backwards;
}

.bounce {
    animation: bounce 2s ease-in-out infinite;
}

.hero__character:nth-child(1) { animation: bounce 3s ease-in-out infinite; }
.hero__character:nth-child(2) { animation: bounce 3s ease-in-out 0.5s infinite; }
.hero__character:nth-child(3) { animation: bounce 3s ease-in-out 1s infinite; }

/* ============================================
   パンくず
   ============================================ */

.breadcrumb {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    max-width: 960px;
    margin: 0 auto;
}

.breadcrumb a {
    color: var(--color-text-muted);
}

.breadcrumb__sep {
    margin: 0 8px;
}

/* ============================================
   インタラクティブ要素共通
   ============================================ */

.app-container {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    margin: var(--space-md) 0;
}

@media (max-width: 640px) {
    .app-container {
        padding: var(--space-md);
    }
}