/* ==============================
   共通ヘッダー・ナビゲーション CSS
   全ページで共有 (header.css)
================================ */

:root {
    --head-background-color: #9A003D;
    --head-font-color: #ffffff;
    --info-background-color: #9A003D;
    --info-font-color: #EFEFEF;
    --background-color: #fffefe;
    --font-color: #454545;
    --btn-background-color: #9A003D;
    --btn-font-color: #ffffff;
}

* {
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.8;
    letter-spacing: 0.04em;
    color: var(--font-color);
    background-color: #f7f5f2;
    background-image: radial-gradient(rgba(46,74,90,0.13) 1px, transparent 1px);
    background-size: 22px 22px;
    background-attachment: fixed;
    line-break: strict;
    overflow-wrap: break-word;
    word-break: normal;
}

h1, h2, h3, h4, h5, h6,
.site-title, .en-title,
.catch-title, .catch-subtitle,
.top-headline, .top-line, .headline {
    font-family: 'Noto Serif JP', serif;
}

/* ヘッダー */
header {
    position: relative;
    width: 100%;
    z-index: 1000;
}

.header-inner {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    background-color: var(--head-background-color);
    box-shadow: 0px 3px 3px -2px #aaa;
    display: flex;
    align-items: center;
    padding: 0 20px;
    box-sizing: border-box;
}

.header-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    flex: 1;
    height: 80px;
    padding-left: 0;
    padding-right: 90px;
    min-width: 0;
    overflow: visible;
}

.site-title {
    display: block;
    font-size: 1.4rem;
    font-weight: bold;
    text-decoration: none;
    color: var(--head-font-color);
    line-height: 1.2;
    font-family: 'Noto Serif JP', serif;
    white-space: normal;
    overflow-wrap: normal;
    word-break: keep-all;
}

.en-title {
    display: block;
    margin: 0;
    font-size: 1rem;
    color: var(--head-font-color);
    text-decoration: none;
    letter-spacing: 0.05em;
    font-family: 'Noto Serif JP', serif;
    font-weight: bold;
}

/* ハンバーガーボタン */
.hamburger-info {
    cursor: pointer;
    width: 42px;
    height: 42px;
    color: var(--info-font-color);
    background-color: var(--head-background-color);
    border: 1px solid var(--head-font-color);
    border-radius: 50%;
    position: fixed;
    top: 19px;
    right: 10px;
    z-index: 1005;
}

.nav-toggle {
    display: block;
    position: relative;
    top: 25%;
    left: 25%;
    width: 50%;
    height: 50%;
}

.nav-toggle i {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--head-font-color);
    position: absolute;
    transform-origin: center center;
    transition: transform .5s, opacity .5s;
}

.nav-toggle i:nth-child(1) { top: 0; }
.nav-toggle i:nth-child(2) { top: 0; bottom: 0; margin: auto; }
.nav-toggle i:nth-child(3) { bottom: 0; }

.nav-toggle.show i:nth-child(1) { transform: translateY(9.5px) rotate(-45deg); }
.nav-toggle.show i:nth-child(2) { opacity: 0; }
.nav-toggle.show i:nth-child(3) { transform: translateY(-9.5px) rotate(45deg); }

/* ハンバーガーメニュー展開 */
.nav {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity .5s, visibility .5s;
}

.nav.show {
    background: var(--info-background-color);
    color: var(--info-font-color);
    opacity: 1;
    visibility: visible;
    z-index: 1004;
}

.nav-menu-ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-menu-li {
    border-top: 1px solid rgba(255,255,255,0.25);
    width: 100%;
}

.nav-menu-li:last-child {
    border-bottom: 1px solid rgba(255,255,255,0.25);
}

.nav-menu-li a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 28px;
    color: var(--info-font-color);
    text-decoration: none;
    transition: background 0.2s;
}

.nav-menu-li a:hover,
.nav-menu-li a.active {
    background: rgba(255,255,255,0.1);
}

.nav-menu-label {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
}

.nav-menu-ja {
    font-size: 1.1rem;
    font-family: 'Noto Serif JP', serif;
    letter-spacing: 0.08em;
}

.nav-menu-en {
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    opacity: 0.6;
    font-family: 'Oswald', sans-serif;
}

.nav-menu-arrow {
    font-size: 1rem;
    opacity: 0.5;
}

/* メニュー下部 */
.nav-footer {
    position: absolute;
    bottom: 40px;
    left: 0;
    right: 0;
    text-align: center;
    padding: 0 24px;
}

.nav-tagline {
    font-family: 'Hannari', serif;
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    opacity: 0.6;
    margin-bottom: 20px;
}

.nav-sns-links {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.nav-sns-links a {
    color: var(--info-font-color);
    text-decoration: none;
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.nav-sns-links a:hover {
    opacity: 1;
}

/* デスクトップナビ（モバイルは非表示） */
.desktop-nav {
    display: none;
}

/* スクロールアニメーション */
.fade-in-section {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in-section.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .fade-in-section {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* トップへ戻るボタン */
#back-to-top {
    position: fixed;
    bottom: 30px;
    right: 20px;
    width: 44px;
    height: 44px;
    background-color: var(--head-background-color);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s, background-color 0.2s;
    z-index: 900;
    box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}

#back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

#back-to-top:hover {
    background-color: #6d0029;
}

/* 山のシルエット区切り */
.mountain-divider {
    width: 100%;
    height: 180px;
    margin-top: 40px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 180' preserveAspectRatio='none'%3E%3Cpath d='M0,155 L200,115 L340,135 L480,88 L600,115 L720,82 L860,108 L1000,78 L1120,102 L1260,80 L1380,98 L1440,85 L1440,180 L0,180 Z' fill='%23ccd8e0'/%3E%3Cpath d='M0,168 L160,138 L280,155 L400,115 L520,145 L660,108 L800,138 L940,100 L1060,132 L1180,102 L1320,128 L1440,112 L1440,180 L0,180 Z' fill='%237a9faf'/%3E%3Cpath d='M0,178 L120,158 L240,172 L380,145 L520,168 L660,140 L820,165 L960,132 L1100,158 L1240,138 L1380,155 L1440,145 L1440,180 L0,180 Z' fill='%232e4a5a'/%3E%3C/svg%3E");
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

/* フッター */
footer {
    padding: 60px 0;
    text-align: center;
    color: #aaa;
}

.site-footer .headline {
    font-size: 1rem;
    font-weight: bold;
    font-family: inherit;
    letter-spacing: normal;
    color: inherit;
    border-left: none;
    padding-left: 0;
    margin: 0 0 5px 0;
    display: block;
}

.sns {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

.sns li {
    padding: 20px;
}

.sns img {
    transition: opacity 0.3s;
}

.sns img:hover {
    opacity: 0.7;
}

.copyright {
    font-size: 0.8rem;
    color: #888;
    margin-top: 30px;
    letter-spacing: 0.05em;
    font-family: 'Noto Serif JP', serif;
}

/* PC用ヘッダー・ナビゲーション (768px以上) */
@media screen and (min-width: 768px) {
    .site-title {
        font-size: 1.4rem;
        line-height: 1.1;
        white-space: nowrap;
    }

    .en-title {
        display: block;
    }

    .header-info {
        padding-left: 0;
        padding-right: 0;
    }

    .desktop-nav {
        display: flex;
        margin-left: auto;
        gap: 25px;
        padding-right: 70px;
        align-items: center;
    }

    .desktop-nav a {
        color: var(--head-font-color);
        text-decoration: none;
        font-size: 0.9rem;
        font-family: 'Noto Serif JP', serif;
        letter-spacing: 0.05em;
        padding: 6px 18px;
        border: 1px solid rgba(255, 255, 255, 0.7);
        border-radius: 20px;
        transition: background-color 0.3s, color 0.3s;
    }

    .desktop-nav a:hover,
    .desktop-nav a.active {
        background-color: #ffffff;
        color: var(--head-background-color);
    }
}

/* 狭い画面ではデスクトップナビを非表示にしてハンバーガーメニューに切り替え */
@media screen and (max-width: 960px) {
    .desktop-nav {
        display: none;
    }
}

.nav-menu-li a.active {
    font-weight: bold;
    opacity: 0.7;
}