/* ============================================================
   blue-dive-theme — css/base.css
   共通：CSS変数・リセット・site-wrapper・サイドバー・main-content
   （他セクションは css/top-page.css など）
   ============================================================ */

:root {
    /* 海・サンゴ・砂浜をイメージしたトーン（ダイビングショップ向け） */
    --bd-ocean-deep: #0c2d42;
    --bd-ocean-mid: #1a5f8a;
    --bd-ocean-bright: #2a8ab8;
    --bd-ocean-light: #5eb3d4;
    --bd-ocean-foam: #e3f2fa;
    --bd-ocean-glass: rgba(255, 255, 255, 0.72);
    --bd-sand-warm: #f6f2e9;
    --bd-surface: #f7fbfd;
    --bd-text: #2a3a44;
    --bd-text-muted: #5a6d78;
    --bd-accent-warm: #f4d03f;
    --bd-border-soft: rgba(26, 95, 138, 0.14);
    --bd-radius-lg: 16px;
    --bd-radius-md: 12px;
    --bd-shadow-card: 0 10px 40px rgba(12, 45, 66, 0.08);
    --bd-shadow-sidebar: 4px 0 28px rgba(12, 45, 66, 0.07);
    --bd-mobile-header-h: 52px;
    --bd-nav-breakpoint: 900px;
    /* サイト全体の背景写真（差し替えはこの1行） */
    --bd-page-bg-image: url("https://uminone-dive.com/wp-content/uploads/2026/04/20260305_152614-scaled.jpg");
    /*
     * 背景写真の上にかぶせる白の濃さ（0〜1）。小さいほど写真が透けて鮮明に見える。
     * 本文が読みにくくなったら 0.05 ずつ上げる。
     */
    --bd-page-bg-overlay-top: 0.42;
    --bd-page-bg-overlay-mid: 0.36;
    --bd-page-bg-overlay-bottom: 0.32;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

/* 基本リセット */
body {
    margin: 0;
    display: flex;
    min-height: 100vh;
    color: var(--bd-text);
    background-color: var(--bd-surface);
}

/* メインエリア全面：背景写真＋読みやすさ用オーバーレイ（濃さは :root の --bd-page-bg-overlay-*） */
.site-wrapper {
    display: flex;
    flex: 1;
    align-items: stretch;
    width: 100%;
    min-height: 100vh;
    background-color: var(--bd-surface);
    background-image:
        linear-gradient(
            180deg,
            rgba(247, 251, 253, var(--bd-page-bg-overlay-top)) 0%,
            rgba(247, 251, 253, var(--bd-page-bg-overlay-mid)) 45%,
            rgba(255, 255, 255, var(--bd-page-bg-overlay-bottom)) 100%
        ),
        var(--bd-page-bg-image);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: scroll;
}

/* サイドバー（上に張り付かないよう余白を多めに） */
.main-sidebar {
    width: 260px;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: linear-gradient(180deg, #ffffff 0%, var(--bd-ocean-foam) 55%, #eef6fa 100%);
    padding: clamp(2rem, 5vw, 3rem) 22px clamp(2rem, 4vw, 2.75rem);
    border-right: 1px solid var(--bd-border-soft);
    box-shadow: var(--bd-shadow-sidebar);
    overflow-y: auto;
}

.main-sidebar .sidebar-inner {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
}

.main-sidebar .site-logo,
.main-sidebar .sidebar-logo {
    padding-top: 0.5rem;
    padding-bottom: 0.25rem;
    text-align: left;
}

.main-sidebar .site-logo a,
.main-sidebar .sidebar-logo a {
    display: block;
    line-height: 0;
}

.main-sidebar .site-logo img,
.main-sidebar .sidebar-logo img {
    display: block;
    width: 160px;
    max-width: 100%;
    height: auto;
    margin: 0;
}

.main-sidebar .side-nav {
    flex: 0 0 auto;
}

/* SNS：メニュー直下に余白を空けて配置（URLは外観カスタマイザー → SNS） */
.main-sidebar .sidebar-social {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--bd-border-soft);
}

.main-sidebar .sidebar-social__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    color: var(--bd-ocean-deep);
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid var(--bd-border-soft);
    transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, transform 0.15s ease;
}

.main-sidebar .sidebar-social__link:hover,
.main-sidebar .sidebar-social__link:focus-visible {
    color: var(--bd-ocean-mid);
    border-color: rgba(42, 138, 184, 0.45);
    background: #fff;
    outline: none;
    transform: translateY(-1px);
}

.main-sidebar .sidebar-social__link:focus-visible {
    box-shadow: 0 0 0 3px rgba(42, 138, 184, 0.3);
}

.main-sidebar .sidebar-social__icon {
    display: block;
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}

.main-sidebar .sidebar-social__icon--stroke {
    width: 21px;
    height: 21px;
    stroke-width: 1.85;
}

.main-sidebar .side-nav a {
    display: inline-block;
    padding: 0.5rem 0;
    line-height: 1.5;
    color: var(--bd-text);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.main-sidebar .side-nav a:hover,
.main-sidebar .side-nav a:focus-visible {
    color: var(--bd-ocean-mid);
    border-bottom-color: rgba(42, 138, 184, 0.45);
}

.main-sidebar .side-nav .current-menu-item > a,
.main-sidebar .side-nav .current_page_item > a {
    color: var(--bd-ocean-deep);
    font-weight: 700;
    border-bottom-color: var(--bd-ocean-bright);
    border-bottom-width: 2px;
}

.main-sidebar .sidebar-search {
    padding-top: 0.25rem;
}

.main-sidebar .sidebar-search .search-form {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}

.main-sidebar .sidebar-search .search-field {
    padding: 0.45rem 0.65rem;
    border: 1px solid var(--bd-border-soft);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.95);
    font-size: 0.9rem;
    color: var(--bd-text);
    min-width: 0;
}

.main-sidebar .sidebar-search .search-field:focus {
    outline: none;
    border-color: var(--bd-ocean-bright);
    box-shadow: 0 0 0 2px rgba(42, 138, 184, 0.2);
}

.main-sidebar .sidebar-search .search-submit {
    padding: 0.45rem 0.85rem;
    border: none;
    border-radius: 8px;
    background: linear-gradient(180deg, var(--bd-ocean-mid), var(--bd-ocean-deep));
    color: #fff;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s ease, transform 0.15s ease;
}

.main-sidebar .sidebar-search .search-submit:hover {
    opacity: 0.92;
    transform: translateY(-1px);
}

.main-sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* ログイン時の管理バー分：サイドバー全体を下げる */
body.admin-bar .main-sidebar {
    top: 32px;
    height: calc(100vh - 32px);
}

@media screen and (max-width: 782px) {
    body.admin-bar .main-sidebar {
        top: 46px;
        height: calc(100vh - 46px);
    }
}

/* メインコンテンツ：十分な余白（左上に張り付かない） */
.main-content {
    margin-left: 260px;
    flex: 1;
    min-width: 0;
    max-width: calc(100vw - 260px);
    padding: clamp(2rem, 5vw, 3.5rem) clamp(1.5rem, 4vw, 3rem) clamp(3rem, 6vw, 4.5rem);
    position: relative;
}