/* =====================================
   [LAYOUT.CSS] サイト共通ナビゲーション
   PC（1024px以上）：左固定サイドバー
   モバイル・タブレット：上部バー＋ハンバーガーで開くドロワー
   各ページの <style> や style.css より後に読み込むこと。
   角丸・グラデーション・多重シャドウは使わない（school/mukonoso/CLAUDE.md）。
   ===================================== */
:root {
    --sidebar-w: 232px;
    --topbar-h: 56px;
    --nav-text: #333333;
    --nav-muted: #666666;
    --nav-line: #e6e6e6;
    --nav-primary: #4A90E2;
    --nav-accent: #F5A623;
    --nav-line-green: #06C755;
}

/* 既存ヘッダー用の上余白を打ち消す */
html.has-sidebar {
    scroll-padding-top: 16px;
}
html.has-sidebar body {
    padding-top: 0;
}

/* ---------- サイドバー本体（PC） ---------- */
.site-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-w);
    z-index: 1100;
    display: flex;
    flex-direction: column;
    background: #ffffff;
    border-right: 1px solid var(--nav-line);
    overflow-y: auto;
    overscroll-behavior: contain;
    font-family: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', Arial, sans-serif;
    line-height: 1.5;
    box-sizing: border-box;
}
.site-sidebar *,
.site-topbar * {
    box-sizing: border-box;
    border-radius: 0;
}
.site-sidebar a {
    text-decoration: none;
}

.sb-brand {
    display: block;
    padding: 28px 24px 20px;
    color: var(--nav-text);
}
.sb-brand img {
    display: block;
    width: 120px;
    height: auto;
    max-height: none;
    margin: 0;
}
.sb-brand span {
    display: block;
    margin-top: 6px;
    font-size: 0.85rem;
    color: var(--nav-muted);
    letter-spacing: 0.08em;
}

.sb-nav {
    display: flex;
    flex-direction: column;
    padding: 8px 0;
    margin: 0;
    background: none;
    border: 0;
}
.sb-nav a {
    display: block;
    padding: 9px 24px;
    font-size: 0.95rem;
    color: var(--nav-text);
    background: none;
    white-space: normal;
}
.sb-nav a:hover {
    color: var(--nav-primary);
    background: #f5f7fa;
}
.sb-nav a[aria-current="page"] {
    color: var(--nav-primary);
    font-weight: bold;
}

.sb-actions {
    margin-top: auto;
    padding: 20px 24px 28px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.sb-tel {
    display: block;
    font-size: 1.15rem;
    font-weight: bold;
    color: var(--nav-text);
    letter-spacing: 0.02em;
}
.sb-tel small {
    display: block;
    font-size: 0.72rem;
    font-weight: normal;
    color: var(--nav-muted);
}
.sb-btn {
    display: block;
    padding: 11px 12px;
    font-size: 0.9rem;
    font-weight: bold;
    text-align: center;
    border: 1px solid transparent;
}
.sb-btn-primary {
    background: var(--nav-accent);
    color: #ffffff;
}
.sb-btn-primary:hover {
    background: #e09400;
}
.sb-btn-outline {
    background: #ffffff;
    color: var(--nav-text);
    border-color: #cccccc;
}
.sb-btn-outline:hover {
    border-color: var(--nav-text);
}
.sb-btn-line {
    background: var(--nav-line-green);
    color: #ffffff;
}
.sb-btn-line:hover {
    background: #05b04a;
}

/* ---------- 上部バー（モバイル） ---------- */
header.site-topbar {
    display: none;
}

/* ---------- PC：本文をサイドバー分ずらす ---------- */
@media (min-width: 1024px) {
    html.has-sidebar body {
        padding-left: var(--sidebar-w);
    }
    html.has-sidebar .fixed-cta-btn {
        left: calc(50% + var(--sidebar-w) / 2);
    }
    .sb-overlay {
        display: none !important;
    }
}

/* ---------- モバイル・タブレット：ドロワー ---------- */
@media (max-width: 1023px) {
    html.has-sidebar {
        scroll-padding-top: calc(var(--topbar-h) + 12px);
    }
    html.has-sidebar body {
        padding-top: var(--topbar-h);
        padding-left: 0;
    }

    header.site-topbar {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        width: 100%;
        max-width: none;
        height: var(--topbar-h);
        margin: 0;
        padding: 0 8px 0 16px;
        box-sizing: border-box;
        z-index: 1100;
        display: flex;
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        background: #ffffff;
        border-bottom: 1px solid var(--nav-line);
        box-shadow: none;
        overflow: visible;
    }
    .site-topbar .tb-brand {
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--nav-text);
        text-decoration: none;
        font-size: 0.85rem;
    }
    .site-topbar .tb-brand img {
        display: block;
        height: 30px;
        width: auto;
        max-height: none;
        margin: 0;
    }
    .sb-toggle {
        width: 48px;
        height: 48px;
        padding: 0;
        margin: 0;
        border: 0;
        background: none;
        cursor: pointer;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 6px;
    }
    .sb-toggle span {
        display: block;
        width: 24px;
        height: 2px;
        background: var(--nav-text);
        transition: transform 0.2s, opacity 0.2s;
    }
    .sb-toggle[aria-expanded="true"] span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .sb-toggle[aria-expanded="true"] span:nth-child(2) {
        opacity: 0;
    }
    .sb-toggle[aria-expanded="true"] span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .site-sidebar {
        width: min(84vw, 300px);
        z-index: 1200;
        transform: translateX(-100%);
        transition: transform 0.25s ease;
        visibility: hidden;
    }
    .site-sidebar.is-open {
        transform: translateX(0);
        visibility: visible;
        box-shadow: 0 0 24px rgba(0,0,0,0.12);
    }
    .sb-overlay {
        position: fixed;
        inset: 0;
        z-index: 1150;
        background: rgba(0,0,0,0.4);
    }
    .sb-overlay[hidden] {
        display: none;
    }
    html.sb-locked,
    html.sb-locked body {
        overflow: hidden;
    }
}

@media (prefers-reduced-motion: reduce) {
    .site-sidebar,
    .sb-toggle span {
        transition: none;
    }
}