/*
Theme Name: Shiramofu Original
Description: 「しらもふおきつね」公式サイト用カスタムテーマ
Author: Shiramofu Okithune
Version: 1.0
Text Domain: shiramofu-original
*/

/* =================================
   1. BASIC DESIGN
================================= */

:root {
    --bg-hakuji: #F8FBF8;
    --text-kokutan: #250D00;
    --font-main: 'Noto Serif JP', serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    background-color: var(--bg-hakuji);
    color: var(--text-kokutan);
    font-family: var(--font-main);
    line-height: 1.8;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-kokutan);
    font-family: var(--font-main);
}

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

a {
    color: inherit;
    text-decoration: none;
}

/* 共通コンテナ */

.site-container,
.site-header-inner,
.site-footer-inner {
    width: min(1200px, 90%);
    margin-right: auto;
    margin-left: auto;
}


/* =================================
   2. HEADER
================================= */

/*
ヘッダーは完全非固定。
スクロールすると通常のページの流れに沿って
上方向へ移動して画面外に消える。
*/

.site-header {
    position: relative;
    z-index: 100;
    width: 100%;
    padding: 20px 0;
    background-color: var(--bg-hakuji);
    border-bottom: 1px solid rgba(37, 13, 0, 0.12);
}

.site-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.site-logo {
    display: inline-block;
    flex-shrink: 0;
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 0.08em;
}


/* =================================
   3. LANGUAGE DROPDOWN
================================= */

.language-dropdown {
    position: relative;
    flex-shrink: 0;
}

.language-dropdown summary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 10px 16px;
    border: 1px solid rgba(37, 13, 0, 0.3);
    background: transparent;
    color: var(--text-kokutan);
    cursor: pointer;
    list-style: none;
    font-family: var(--font-main);
    font-size: 13px;
    letter-spacing: 0.08em;
    white-space: nowrap;
    transition: background 0.3s, color 0.3s;
}

.language-dropdown summary::-webkit-details-marker {
    display: none;
}

.language-dropdown summary:hover {
    background: var(--text-kokutan);
    color: var(--bg-hakuji);
}

.language-arrow {
    transition: transform 0.3s ease;
}

.language-dropdown[open] .language-arrow {
    transform: rotate(180deg);
}

/* 言語一覧：縦一列 */

.language-menu {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    z-index: 1000;
    width: 190px;
    padding: 8px;
    background: var(--bg-hakuji);
    border: 1px solid rgba(37, 13, 0, 0.2);
    box-shadow: 0 8px 25px rgba(37, 13, 0, 0.12);
    flex-direction: column;
}

.language-dropdown[open] .language-menu {
    display: flex;
}

.language-menu a {
    display: flex;
    width: 100%;
    min-height: 42px;
    align-items: center;
    justify-content: space-between;
    padding: 10px 13px;
    color: var(--text-kokutan);
    background: transparent;
    font-size: 13px;
    letter-spacing: 0.05em;
    white-space: nowrap;
    transition: background 0.2s, color 0.2s;
}

.language-menu a:hover {
    background: #E9EDE7;
}

.language-menu a.current-language {
    background: var(--text-kokutan);
    color: var(--bg-hakuji);
}


/* =================================
   4. MAIN CONTENT
================================= */

#main-content {
    min-height: 65vh;
    padding: 80px 0;
}

#main-content h1 {
    font-size: clamp(28px, 5vw, 48px);
    font-weight: 500;
    letter-spacing: 0.08em;
}

/* 固定ページ */

.page-content {
    width: min(1000px, 90%);
    margin: 0 auto;
}

.page-body {
    font-size: 16px;
    line-height: 2;
}


/* =================================
   5. HERO SECTION
================================= */

.hero-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 680px;
    padding: 90px 5%;
    text-align: center;
    background: radial-gradient(
        ellipse at 50% 40%,
        #FFFFFF 0%,
        #F8FBF8 65%,
        #EEF2EC 100%
    );
}

.hero-content {
    width: 100%;
    max-width: 900px;
    margin: 0 auto 55px;
}

.hero-subtitle {
    margin-bottom: 25px;
    font-size: 12px;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    opacity: 0.7;
}

.hero-title {
    margin: 0 0 25px;
    font-size: clamp(36px, 7vw, 76px);
    font-weight: 500;
    letter-spacing: 0.16em;
}

.hero-description {
    margin-bottom: 35px;
    font-size: clamp(14px, 2vw, 17px);
    line-height: 2.2;
    letter-spacing: 0.08em;
}

.hero-button {
    display: inline-block;
    padding: 13px 38px;
    border: 1px solid var(--text-kokutan);
    font-size: 13px;
    letter-spacing: 0.12em;
    transition: background 0.3s, color 0.3s;
}

.hero-button:hover {
    background: var(--text-kokutan);
    color: var(--bg-hakuji);
}

/* メイン画像・動画エリア */

.hero-media {
    width: min(100%, 1050px);
    margin: 0 auto;
}

.hero-media-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    aspect-ratio: 16 / 7;
    min-height: 240px;
    background: #E9EDE7;
    border: 1px solid rgba(37, 13, 0, 0.12);
    color: var(--text-kokutan);
}

.hero-media-placeholder p {
    font-size: 16px;
    letter-spacing: 0.12em;
}

.hero-media-placeholder span {
    font-size: 10px;
    letter-spacing: 0.2em;
    opacity: 0.55;
}

/* 仮ロゴ画像 */

.hero-logo-image {
    display: block;
    width: min(100%, 800px);
    height: auto;
    margin: 0 auto;
    object-fit: contain;
}


/* =================================
   6. ABOUT SECTION
================================= */

.about-section {
    padding: 120px 20px;
    background: var(--bg-hakuji);
    text-align: center;
}

.about-inner {
    width: min(800px, 100%);
    margin: 0 auto;
}

.section-label {
    margin-bottom: 25px;
    font-size: 11px;
    letter-spacing: 0.3em;
    opacity: 0.6;
}

.about-section h2 {
    margin-bottom: 35px;
    font-size: clamp(25px, 4vw, 38px);
    font-weight: 500;
    letter-spacing: 0.12em;
}

.about-section p:last-child {
    font-size: 15px;
    line-height: 2.3;
    letter-spacing: 0.06em;
}


/* =================================
   7. FOOTER
================================= */

.site-footer {
    padding: 50px 0 30px;
    background: var(--text-kokutan);
    color: var(--bg-hakuji);
    text-align: center;
}

.footer-logo {
    margin-bottom: 15px; /* 見た目のバランスを調整 */
    font-size: 20px;
    letter-spacing: 0.1em;
}

.copyright {
    font-size: 12px;
    opacity: 0.7;
}


/* =================================
   8. 404 PAGE
================================= */

.error-page {
    text-align: center;
}

.error-code {
    margin: 0;
    font-size: clamp(70px, 12vw, 130px);
    letter-spacing: 0.1em;
}

.home-link {
    display: inline-block;
    margin-top: 25px;
    padding: 12px 30px;
    border: 1px solid var(--text-kokutan);
    transition: background 0.3s, color 0.3s;
}

.home-link:hover {
    background: var(--text-kokutan);
    color: var(--bg-hakuji);
}


/* =================================
   9. MOBILE
================================= */

@media (max-width: 768px) {

    .site-header {
        padding: 16px 0;
    }

    .site-header-inner {
        gap: 10px;
    }

    .site-logo {
        font-size: 17px;
        letter-spacing: 0.03em;
    }

    .language-dropdown summary {
        gap: 6px;
        padding: 9px 10px;
        font-size: 11px;
    }

    .language-menu {
        width: 175px;
    }

    #main-content {
        padding: 55px 0;
    }

    .hero-section {
        min-height: auto;
        padding: 75px 6% 65px;
    }

    .hero-content {
        margin-bottom: 40px;
    }

    .hero-title {
        letter-spacing: 0.08em;
    }

    .hero-media {
        width: 100%;
    }

    .hero-media-placeholder {
        aspect-ratio: 4 / 3;
        min-height: 200px;
    }

    .about-section {
        padding: 80px 22px;
    }
}


/* =================================
   10. ACCESSIBILITY
================================= */

@media (prefers-reduced-motion: reduce) {

    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}