/**
 * @file layout.css
 * @description サイト共通レイアウトのスタイル定義
 * @summary
 *   - デザイントークン（上書き/追加）
 *   - ヘッダー・ナビゲーション
 *   - 共通セクション・カード
 *   - フッター
 *   - ハンバーガーメニュー
 *   - おすすめ記事セクション
 *   - 言語切り替え
 * @recent_changes
 *   - ファイル先頭に説明コメントを追加
 */

:root {
    --color-accent-soft: rgba(108, 99, 255, 0.15);
    --color-accent: #6c63ff;
    --color-accent-dark: #4f47cc;

    --color-accent-rgb: 108, 99, 255;
    --color-accent-dark-rgb: 79, 71, 204;

    --color-border: rgba(var(--color-text-rgb), 0.1);
    --color-border-soft: rgba(var(--color-text-rgb), 0.05);

    --color-text: #e0e0e0;
    --color-text-muted: #a0a0a0;
    --color-text-rgb: 224, 224, 224;

    --color-background: #101217;
    --color-surface: #1e2027;
    --color-panel: #16181d;
    --color-heading: #ffffff;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 15px
        rgba(var(--color-accent-rgb), 0.3);

    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;

    --transition-smooth: all 0.2s ease-in-out;
}

/* ==========================================================================
   1. ヘッダー
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100; /* メニューより上に */
    background: rgba(22, 27, 34, 0.85);
    border-bottom: 1px solid;
    border-image-source: linear-gradient(
        to right,
        transparent,
        var(--color-border),
        transparent
    );
    border-image-slice: 1;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-shrink: 0;
}

.site-header__inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0.75rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.site-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--color-heading);
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: 0.025em;
    transition: var(--transition-smooth);
}
.site-logo:hover {
    transform: scale(1.02);
}

.site-logo__mark {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: var(--radius-md);
    background: linear-gradient(
        135deg,
        var(--color-accent-dark) 0%,
        var(--color-accent) 100%
    );
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    color: #fff;
    box-shadow: var(--shadow-md);
    animation: logo-pulse 2.8s infinite ease-in-out;
}

@keyframes logo-pulse {
    0% {
        transform: scale(1);
        box-shadow: var(--shadow-md);
    }
    50% {
        transform: scale(1.05);
        box-shadow: var(--shadow-lg);
    }
    100% {
        transform: scale(1);
        box-shadow: var(--shadow-md);
    }
}

/* ==========================================================================
   2. ナビゲーション
   ========================================================================== */
.site-nav {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.site-nav a {
    position: relative;
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    padding: 0.35rem 0.9rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    transition: var(--transition-smooth);
}

.site-nav a:hover {
    background: var(--color-accent-soft);
    border-color: transparent;
    color: var(--color-text);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.site-nav a.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
    box-shadow: var(--shadow-glow);
}

/* ==========================================================================
   3. 共通セクション / カード
   ========================================================================== */
.section {
    background: var(--color-panel);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.section__title {
    margin-top: 0;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.5;
    color: var(--color-heading);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section__title::before {
    content: "";
    display: inline-block;
    width: 0.3rem;
    height: 1.5em;
    flex-shrink: 0;
    border-radius: var(--radius-sm);
    background: linear-gradient(
        180deg,
        var(--color-accent),
        var(--color-accent-dark)
    );
}

.card-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(
        auto-fit,
        minmax(250px, 1fr)
    );
    gap: 1.25rem;
}

.card {
    position: relative;
    z-index: 1;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    border: 1px solid var(--color-border-soft);
    box-shadow: var(--shadow-md);
    transition: var(--transition-smooth);
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    z-index: -1;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: inherit;
    border: 1px solid transparent;
    background: linear-gradient(
            to right,
            var(--color-accent),
            var(--color-accent-dark)
        )
        border-box;
    mask:
        linear-gradient(#fff 0 0) padding-box,
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: destination-out;
    mask-composite: exclude;
    opacity: 0;
    transition: var(--transition-smooth);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    background: var(--color-panel);
}

.card:hover::before {
    opacity: 1;
}

/* ==========================================================================
   4. ページ全体のレイアウト
   ========================================================================== */
.page-shell {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.main-container {
    flex-grow: 1;
}

/* ==========================================================================
   4. フッター
   ========================================================================== */
/* フッターをヘッダーと同じようにスティッキーにして、
   メニュー展開等で body に no-scroll クラスが付与された時は固定に切り替える */
.site-footer {
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
    padding: 1rem 1.25rem 1.5rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    flex-shrink: 0;

    /* sticky で画面下に固定 */
    position: sticky;
    bottom: 0;
    z-index: 100; /* ヘッダーと同等のレイヤーに配置 */
}

.site-footer__inner {
    max-width: 1120px;
    margin: 0 auto;
    display: flex;
    gap: 0.75rem;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.site-footer__right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    max-width: 100%;
}

.site-footer__right a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-md);
    transition: var(--transition-smooth);
    white-space: nowrap;
}

.site-footer__right a:hover {
    background: var(--color-accent-soft);
    color: var(--color-text);
}

.site-footer__sep {
    opacity: 0.5;
}

/* ==========================================================================
   5. ハンバーガーメニュー
   ========================================================================== */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    position: relative;
    z-index: 101; /* ヘッダーより上 */
}

.nav-toggle__icon {
    display: block;
    width: 2rem;
    height: 2px;
    background: var(--color-heading);
    position: relative;
    transition: background 0.3s ease-in-out;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
    content: "";
    display: block;
    width: 2rem;
    height: 2px;
    background: var(--color-heading);
    position: absolute;
    left: 0;
    transition:
        transform 0.3s ease-in-out,
        top 0.3s ease-in-out;
}

.nav-toggle__icon::before {
    top: -8px;
}

.nav-toggle__icon::after {
    top: 8px;
}

.nav-toggle.is-active .nav-toggle__icon {
    background: transparent;
}

.nav-toggle.is-active .nav-toggle__icon::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle.is-active .nav-toggle__icon::after {
    top: 0;
    transform: rotate(-45deg);
}

/* ==========================================================================
   6. レスポンシブデザイン
   ========================================================================== */
@media (max-width: 768px) {
    .site-header__inner {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        padding: 0.75rem 1.25rem;
    }

    .site-logo {
        margin-bottom: 0;
    }

    .nav-toggle {
        display: block;
    }

    .site-nav {
        display: flex;
        position: fixed;
        top: 0;
        right: -100%;
        left: auto;
        width: 100%; /* 全幅に変更してモダンなドロワーに */
        max-width: 320px; /* PCなど幅広画面での事故防止（スマホではほぼ全幅） */
        height: 100vh;
        height: 100dvh; /* Dynamic Viewport Height for mobile */
        background: rgba(22, 27, 34, 0.95); /* 少し濃く */
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: flex-start;
        gap: 1.5rem;
        transition:
            right 0.3s cubic-bezier(0.16, 1, 0.3, 1),
            /* イージングを調整 */ visibility 0s 0.3s;
        z-index: 100; /* ヘッダーと同じレベルで、トグルボタンより下 */
        padding-top: calc(4rem + 2rem);
        padding-bottom: 2rem;
        padding-left: 2rem;
        padding-right: 2rem;
        flex-wrap: nowrap;
        overflow-y: auto;
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
        visibility: hidden;
    }

    .site-nav.is-open {
        right: 0;
        visibility: visible;
        transition-delay: 0s;
    }

    /* メニュー背景のオーバーレイ（擬似要素で実装）
       JSでbodyにクラスがついたときに表示するなど必要だが、
       現状のJS実装に合わせてCSSのみで完結させるならメニュー自体を広げるか、
       box-shadowで代用する手もある。
       ここではメニュー自体のシャドウを強化して対応。
    */

    .site-nav a {
        font-size: 1.5rem;
        padding: 0.75rem 0;
        width: 100%;
        text-align: left;
        margin: 0;
        display: block;
        border: none;
        border-bottom: 1px solid var(--color-border-soft);
        border-radius: 0;
    }

    .site-nav a:hover,
    .site-nav a.active {
        background: transparent;
        color: var(--color-accent);
        transform: translateX(10px); /* 横にスライド */
        box-shadow: none;
    }
}

html.no-scroll,
body.no-scroll {
    overflow: hidden;
}

/* メニュー展開時はヘッダーを強制固定して画面外に飛ばないようにする */
body.no-scroll .site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
}

/* メニュー展開時はフッターも固定に切り替える（ヘッダーと同様の挙動） */
body.no-scroll .site-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
}

/* footer が固定表示になると main の下部が隠れる場合があるため、
   必要に応じてページのコンテンツ側で padding-bottom を調整してください。
   このCSSはレイアウトを大きく変更しないよう、既存の構造に合わせて
   ヘッダーと同等の挙動に揃えるのみを行っています。 */

#menuAnimationCanvas {
    position: fixed; /* absolute から fixed に変更して背景固定 */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

/* ==========================================================================
   7. おすすめ記事セクション (共通)
   ========================================================================== */
.section--recommend {
    margin-top: 4rem;
}

.recommend-grid {
    display: grid;
    grid-template-columns: repeat(
        auto-fit,
        minmax(280px, 1fr)
    );
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.card--recommend {
    padding: 0;
    display: flex;
    flex-direction: column;
    height: 100%;
    text-decoration: none;
    color: var(--color-text);
}

.card--recommend__thumb {
    width: 100%;
    height: 160px;
    object-fit: cover;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border-soft);
}

.card--recommend__content {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card--recommend__title {
    margin: 0 0 0.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-heading);
    line-height: 1.4;
}

.card--recommend__desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    flex-grow: 1;
    display: -webkit-box;
    overflow: hidden;
}

.card--recommend__meta {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}

.card--recommend__tag {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 0.1rem 0.4rem;
    font-size: 0.75rem;
}

/* ==========================================================================
   8. 言語切り替え
   ========================================================================== */
.lang-group {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 0.75rem;
    padding-left: 0.75rem;
    border-left: 1px solid var(--color-border);
    color: var(--color-text-muted);
}

.lang-icon {
    width: 1.25rem;
    height: 1.25rem;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    opacity: 0.8;
}

.lang-option {
    text-decoration: none;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
    cursor: pointer;
    line-height: 1;
}

.lang-option:hover {
    color: var(--color-text);
    background-color: var(--color-accent-soft);
}

.lang-option.active {
    color: var(--color-accent);
    background-color: rgba(var(--color-accent-rgb), 0.1);
    font-weight: 700;
    cursor: default;
    pointer-events: none;
}

.lang-sep {
    opacity: 0.3;
    font-size: 0.8rem;
    user-select: none;
}

@media (max-width: 768px) {
    .lang-group {
        margin-left: 0;
        padding-left: 0;
        border-left: none;
        margin-top: 1rem;
        padding-top: 1rem;
        border-top: 1px solid var(--color-border-soft);
        width: 100%;
    }

    .lang-option {
        font-size: 1rem;
        padding: 0.5rem 1rem;
    }
}

/* ==========================================================================
   9. Bread Pet Character
   ========================================================================== */
.bread-pet {
    position: absolute;
    top: 0;
    left: 0;
    width: 40px;
    height: 40px;
    z-index: 10000;
    pointer-events: none;
    will-change: transform;
    opacity: 0;
    transition: opacity 0.3s;
    margin-left: -20px;
    image-rendering: pixelated;
}

.bread-pet.is-visible {
    opacity: 1;
}

.bread-pet__scale {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scale(3);
    transform-origin: bottom center;
}

.bread-pet__body {
    position: relative;
    width: 14px;
    height: 12px;
    background: #f4d03f;
    box-shadow:
        inset 1px 1px 0 rgba(255, 255, 255, 0.5),
        inset -1px -1px 0 rgba(0, 0, 0, 0.1),
        0 0 0 1px #8d6e63; /* Pixel border */
    display: flex;
    justify-content: center;
    transform-origin: bottom center;
}

/* Inner white part of bread */
.bread-pet__body::after {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    right: 2px;
    bottom: 2px;
    background: #fff8dc;
}

.bread-pet__face {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.bread-pet__eye {
    position: absolute;
    top: 4px;
    width: 2px;
    height: 2px;
    background: #3e2723;
    animation: blink 4s infinite;
}

.bread-pet__eye.left {
    left: 3px;
}
.bread-pet__eye.right {
    right: 3px;
}

.bread-pet__mouth {
    position: absolute;
    top: 7px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 1px;
    background: #3e2723;
}

.bread-pet.mouth-open .bread-pet__mouth {
    height: 3px;
    top: 6px;
    background: #d84315;
}

.bread-pet__cheek {
    position: absolute;
    top: 5px;
    width: 2px;
    height: 1px;
    background: #ffab91;
}
.bread-pet__cheek.left {
    left: 1px;
}
.bread-pet__cheek.right {
    right: 1px;
}

.bread-pet__leg {
    position: absolute;
    bottom: -2px;
    width: 2px;
    height: 3px;
    background: #d4ac0d;
    z-index: 0;
    box-shadow: 0 0 0 1px #8d6e63;
}
.bread-pet__leg.left {
    left: 3px;
}
.bread-pet__leg.right {
    right: 3px;
}

.bread-pet__shadow {
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 14px;
    height: 4px;
    background: rgba(0, 0, 0, 0.15);
    box-shadow: 0 0 0 0.5px rgba(0, 0, 0, 0.5);
    z-index: -1;
}

/* ==========================================================================
   Bread Pet Directions (Isometric Pixel Art)
   ========================================================================== */

/* --- Front-Left (Down-Left) --- */
.bread-pet[data-facing="front-left"] .bread-pet__eye.right {
    right: 4px;
}
.bread-pet[data-facing="front-left"] .bread-pet__eye.left {
    left: 2px;
}
.bread-pet[data-facing="front-left"]
    .bread-pet__cheek.right {
    right: 2px;
}
.bread-pet[data-facing="front-left"]
    .bread-pet__cheek.left {
    left: 0;
}
.bread-pet[data-facing="front-left"] .bread-pet__mouth {
    transform: translateX(-3px);
}

/* --- Front-Right (Down-Right) --- */
.bread-pet[data-facing="front-right"] .bread-pet__eye.left {
    left: 4px;
}
.bread-pet[data-facing="front-right"]
    .bread-pet__eye.right {
    right: 2px;
}
.bread-pet[data-facing="front-right"]
    .bread-pet__cheek.left {
    left: 2px;
}
.bread-pet[data-facing="front-right"]
    .bread-pet__cheek.right {
    right: 0;
}
.bread-pet[data-facing="front-right"] .bread-pet__mouth {
    transform: translateX(1px);
}

/* --- Back-Left (Up-Left) --- */
.bread-pet[data-facing="back-left"] .bread-pet__face {
    display: none;
}
.bread-pet[data-facing="back-left"] .bread-pet__body {
    background: #d4ac0d;
}
.bread-pet[data-facing="back-left"]
    .bread-pet__body::after {
    display: none;
}

/* --- Back-Right (Up-Right) --- */
.bread-pet[data-facing="back-right"] .bread-pet__face {
    display: none;
}
.bread-pet[data-facing="back-right"] .bread-pet__body {
    background: #d4ac0d;
}
.bread-pet[data-facing="back-right"]
    .bread-pet__body::after {
    display: none;
}

/* Animations */
@keyframes blink {
    0%,
    96%,
    100% {
        transform: scaleY(1);
    }
    98% {
        transform: scaleY(0.1);
    }
}

/* Walking Animation */
.bread-pet.is-walking .bread-pet__body {
    animation: bounce 0.2s infinite alternate steps(2);
}

.bread-pet.is-walking .bread-pet__leg.left {
    animation: walk 0.2s infinite alternate steps(2);
}
.bread-pet.is-walking .bread-pet__leg.right {
    animation: walk 0.2s infinite alternate-reverse steps(2);
}

.bread-pet[data-facing="front-right"].is-walking
    .bread-pet__leg.left {
    left: 1px;
}

.bread-pet[data-facing="front-right"].is-walking
    .bread-pet__leg.right {
    right: 4px;
}

.bread-[data-facing="front-left"].is-walking
    .bread-pet__leg.left {
    left: 4px;
}
.bread-pet[data-facing="front-left"].is-walking
    .bread-pet__leg.right {
    right: 1px;
}

.bread-pet[data-facing="back-right"].is-walking
    .bread-pet__leg.left {
    left: 1px;
}

.bread-pet[data-facing="back-right"].is-walking
    .bread-pet__leg.right {
    right: 4px;
}

.bread-[data-facing="back-left"].is-walking
    .bread-pet__leg.left {
    left: 4px;
}
.bread-pet[data-facing="back-left"].is-walking
    .bread-pet__leg.right {
    right: 1px;
}
@keyframes bounce {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-1px);
    }
}

@keyframes walk {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-2px);
    }
}

/* Spawn Animation */
@keyframes bread-pop {
    0% {
        transform: scale(0) translateY(20px);
        opacity: 0;
    }
    40% {
        transform: scale(1.25, 0.75) translateY(-10px);
        opacity: 1;
    }
    50% {
        transform: scale(0.85, 1.15) translateY(-15px);
    }
    65% {
        transform: scale(1.05, 0.95) translateY(5px);
    }
    80% {
        transform: scale(0.98, 1.02) translateY(-2px);
    }
    100% {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

.bread-pet.is-spawning .bread-pet__body {
    animation: bread-pop 0.6s cubic-bezier(0.5, 0, 0.5, 1)
        forwards;
}