@charset "UTF-8";
/* ==========================================================================
   kengaku-modern.css
   過去の見学会アーカイブ（kengaku-kako_index.html）専用モダンデザインスタイル
   ========================================================================== */

:root {
    --kg-primary: #22211f;
    --kg-primary-light: #3a3734;
    --kg-primary-soft: #f6f5f4;
    --kg-accent: #43413e;
    --kg-accent-hover: #4e4a47;
    --kg-accent-gold: #b48c36;
    --kg-accent-gold-soft: #fdf8ed;
    --kg-text-dark: #272523;
    --kg-text-muted: #7c7873;
    --kg-text-subtle: #aaa6a2;
    --kg-bg-page: #fafafa;
    --kg-bg-white: #ffffff;
    --kg-bg-card: #ffffff;
    --kg-bg-tag: #f3f2f1;
    --kg-border: #ebe9e7;
    --kg-border-subtle: rgba(235, 233, 231, 0.8);
    --kg-shadow-xs: 0 1px 3px rgba(22, 21, 20, 0.05);
    --kg-shadow-sm: 0 4px 12px rgba(22, 21, 20, 0.04);
    --kg-shadow-md: 0 8px 24px -4px rgba(22, 21, 20, 0.07);
    --kg-shadow-lg: 0 16px 36px -6px rgba(22, 21, 20, 0.1);
    --kg-shadow-hover: 0 12px 28px -4px rgba(67, 65, 62, 0.15);
    --kg-radius-sm: 8px;
    --kg-radius-md: 12px;
    --kg-radius-lg: 16px;
    --kg-radius-pill: 9999px;
    --kg-transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   1. ヒーロー＆イントロセクション
   -------------------------------------------------------------------------- */
.kg-intro-section {
    margin-bottom: 28px;
    text-align: center;
}

.kg-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: linear-gradient(135deg, #f0efee 0%, #f4f3f3 100%);
    border: 1px solid #e1dedc;
    border-radius: var(--kg-radius-pill);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: #4e4a47;
    margin-bottom: 12px;
    box-shadow: var(--kg-shadow-xs);
}

.kg-eyebrow-icon {
    font-size: 14px;
}

.kg-lead-box {
    max-width: 820px;
    margin: 18px auto 0;
    padding: 18px 24px;
    background: var(--kg-bg-white);
    border: 1px solid var(--kg-border);
    border-radius: var(--kg-radius-md);
    box-shadow: var(--kg-shadow-xs);
    font-size: 14.5px;
    line-height: 1.8;
    color: var(--kg-text-dark);
    text-align: left;
}

@media (max-width: 600px) {
    .kg-lead-box {
        padding: 14px 16px;
        font-size: 13.5px;
    }
}

/* --------------------------------------------------------------------------
   2. 実績スタッツカード（4大キーファクト）
   -------------------------------------------------------------------------- */
.kg-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin: 28px 0 36px;
}

.kg-stat-card {
    background: var(--kg-bg-white);
    border: 1px solid var(--kg-border);
    border-radius: var(--kg-radius-lg);
    padding: 20px 18px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--kg-shadow-sm);
    transition: var(--kg-transition);
}

.kg-stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--kg-primary), var(--kg-accent));
    opacity: 0;
    transition: var(--kg-transition);
}

.kg-stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--kg-shadow-md);
    border-color: #d9d6d3;
}

.kg-stat-card:hover::before {
    opacity: 1;
}

.kg-stat-icon-wrap {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    background: var(--kg-primary-soft);
    color: var(--kg-accent);
    font-size: 20px;
    transition: var(--kg-transition);
}

.kg-stat-card:hover .kg-stat-icon-wrap {
    transform: scale(1.08);
    background: #f0efee;
}

.kg-stat-label {
    font-size: 12.5px;
    font-weight: 700;
    color: var(--kg-text-muted);
    letter-spacing: 0.04em;
    margin-bottom: 4px;
}

.kg-stat-value {
    font-family: 'Inter', var(--font-base), sans-serif;
    font-size: 32px;
    font-weight: 800;
    color: var(--kg-primary);
    line-height: 1.15;
    margin-bottom: 4px;
    display: flex;
    align-items: baseline;
    gap: 2px;
}

.kg-stat-value-format {
    font-size: 24px;
}

.kg-stat-unit {
    font-family: var(--font-base), sans-serif;
    font-size: 14px;
    font-weight: 700;
    color: var(--kg-text-muted);
}

.kg-stat-desc {
    font-size: 11.5px;
    color: var(--kg-text-subtle);
    margin-top: 2px;
    font-weight: 500;
}

@media (max-width: 900px) {
    .kg-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .kg-stat-card {
        padding: 16px 14px;
    }
    .kg-stat-value {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .kg-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    .kg-stat-card {
        padding: 14px 10px;
    }
    .kg-stat-icon-wrap {
        width: 36px;
        height: 36px;
        font-size: 16px;
        margin-bottom: 8px;
    }
    .kg-stat-value {
        font-size: 24px;
    }
    .kg-stat-desc {
        font-size: 10.5px;
    }
}

/* --------------------------------------------------------------------------
   3. スマート・イヤー・セレクター（開催年ナビゲーション）
   -------------------------------------------------------------------------- */
.kg-nav-panel {
    background: var(--kg-bg-white);
    border: 1px solid var(--kg-border);
    border-radius: var(--kg-radius-lg);
    padding: 22px 24px 20px;
    margin: 32px 0 36px;
    box-shadow: var(--kg-shadow-sm);
    position: relative;
}

.kg-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 14px;
    border-bottom: 1px solid #f6f5f4;
}

.kg-nav-title-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.kg-nav-title-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: #f0efee;
    color: var(--kg-accent);
    border-radius: var(--kg-radius-sm);
    font-size: 16px;
}

.kg-nav-title {
    margin: 0;
    font-size: 16px;
    font-weight: 800;
    color: var(--kg-primary);
    letter-spacing: 0.02em;
}

.kg-nav-subtitle {
    font-size: 12px;
    color: var(--kg-text-muted);
    font-weight: 500;
}

/* 一括開閉ボタン群 */
.kg-toggle-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.kg-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    background: var(--kg-bg-soft);
    border: 1px solid var(--kg-border);
    border-radius: var(--kg-radius-pill);
    font-size: 12px;
    font-weight: 700;
    color: var(--kg-text-dark);
    cursor: pointer;
    transition: var(--kg-transition);
    user-select: none;
}

.kg-toggle-btn:hover {
    background: #ebe9e7;
    color: var(--kg-primary);
    border-color: #d9d6d3;
}

.kg-toggle-btn:active {
    transform: scale(0.97);
}

.kg-toggle-btn-icon {
    font-size: 13px;
}

/* 年度ピルチップ一覧 */
.kg-chips-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 10px;
}

.kg-year-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--kg-bg-soft);
    border: 1px solid var(--kg-border);
    border-radius: var(--kg-radius-pill);
    font-size: 13px;
    font-weight: 700;
    color: var(--kg-primary);
    text-decoration: none;
    transition: var(--kg-transition);
    user-select: none;
}

.kg-year-chip:hover {
    background: #f0efee;
    border-color: #9d9995;
    color: var(--kg-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--kg-shadow-xs);
}

.kg-year-chip:focus-visible {
    outline: 2px solid var(--kg-accent);
    outline-offset: 2px;
}

/* 最新年のハイライトバッジ */
.kg-year-chip.is-latest {
    background: linear-gradient(135deg, #22211f 0%, #3a3734 100%);
    border-color: #22211f;
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(34, 33, 31, 0.2);
}

.kg-year-chip.is-latest:hover {
    background: linear-gradient(135deg, #3a3734 0%, #43413e 100%);
    border-color: var(--kg-accent);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(67, 65, 62, 0.3);
}

.kg-year-chip.is-latest .kg-chip-count {
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
}

.kg-chip-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: rgba(22, 21, 20, 0.08);
    border-radius: 10px;
    font-family: 'Inter', sans-serif;
    font-size: 11px;
    font-weight: 800;
    color: var(--kg-text-muted);
    transition: var(--kg-transition);
}

.kg-year-chip:hover .kg-chip-count {
    background: #43413e;
    color: #ffffff;
}

@media (max-width: 600px) {
    .kg-nav-panel {
        padding: 16px;
        margin: 24px 0;
    }
    .kg-nav-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .kg-toggle-group {
        width: 100%;
        justify-content: flex-end;
    }
    .kg-year-chip {
        padding: 6px 11px;
        font-size: 12px;
        gap: 5px;
    }
    .kg-chip-count {
        font-size: 10.5px;
        min-width: 18px;
        height: 18px;
        padding: 0 4px;
    }
}

/* --------------------------------------------------------------------------
   4. 年ごとのタイムライン風モダンアコーディオン
   -------------------------------------------------------------------------- */
.kg-timeline-wrapper {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 48px;
}

.kg-year-accordion {
    background: var(--kg-bg-white);
    border: 1px solid var(--kg-border);
    border-radius: var(--kg-radius-lg);
    box-shadow: var(--kg-shadow-xs);
    overflow: hidden;
    transition: var(--kg-transition);
    scroll-margin-top: 80px;
}

.kg-year-accordion:hover {
    border-color: #d9d6d3;
    box-shadow: var(--kg-shadow-sm);
}

.kg-year-accordion[open] {
    border-color: #aaa6a2;
    box-shadow: var(--kg-shadow-md);
}

/* アコーディオン見出し（summary） */
.kg-year-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    background: var(--kg-bg-white);
    cursor: pointer;
    user-select: none;
    list-style: none;
    transition: var(--kg-transition);
    border-left: 4px solid transparent;
}

.kg-year-summary::-webkit-details-marker {
    display: none;
}

.kg-year-accordion[open] .kg-year-summary {
    background: #fafafa;
    border-left-color: var(--kg-accent);
    border-bottom: 1px solid #f6f5f4;
}

.kg-year-summary:hover {
    background: #f6f5f4;
}

.kg-year-heading-group {
    display: flex;
    align-items: baseline;
    gap: 12px;
    flex-wrap: wrap;
}

.kg-year-number {
    font-family: 'Inter', var(--font-base), sans-serif;
    font-size: 24px;
    font-weight: 800;
    color: var(--kg-primary);
    letter-spacing: -0.02em;
    display: flex;
    align-items: baseline;
}

.kg-year-unit {
    font-size: 15px;
    font-weight: 700;
    margin-left: 2px;
}

.kg-year-wareki {
    font-size: 13px;
    font-weight: 600;
    color: var(--kg-text-muted);
}

.kg-year-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    background: #f0efee;
    border-radius: var(--kg-radius-pill);
    font-size: 12px;
    font-weight: 700;
    color: var(--kg-accent-hover);
}

/* 開閉Chevronアイコン */
.kg-chevron-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--kg-bg-soft);
    color: var(--kg-text-muted);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.2s;
}

.kg-year-summary:hover .kg-chevron-wrap {
    background: #ebe9e7;
    color: var(--kg-primary);
}

.kg-year-accordion[open] .kg-chevron-wrap {
    transform: rotate(180deg);
    background: var(--kg-primary);
    color: #ffffff;
}

.kg-chevron-icon {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

/* アコーディオン本文 */
.kg-year-content {
    padding: 24px;
    background: #fbfbfb;
}

@media (max-width: 600px) {
    .kg-year-summary {
        padding: 14px 16px;
    }
    .kg-year-number {
        font-size: 20px;
    }
    .kg-year-unit {
        font-size: 13px;
    }
    .kg-year-wareki {
        font-size: 12px;
    }
    .kg-year-badge {
        font-size: 11px;
        padding: 2px 8px;
    }
    .kg-year-content {
        padding: 16px 12px;
    }
    .kg-chevron-wrap {
        width: 28px;
        height: 28px;
    }
}

/* --------------------------------------------------------------------------
   5. チラシカード（ギャラリー形式）
   -------------------------------------------------------------------------- */
.kg-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.kg-flyer-card {
    display: flex;
    flex-direction: column;
    background: var(--kg-bg-white);
    border: 1px solid var(--kg-border);
    border-radius: var(--kg-radius-md);
    overflow: hidden;
    text-decoration: none;
    box-shadow: var(--kg-shadow-xs);
    transition: var(--kg-transition);
    position: relative;
}

.kg-flyer-card:hover,
.kg-flyer-card:focus-visible {
    transform: translateY(-5px);
    border-color: #a8a4a1;
    box-shadow: var(--kg-shadow-hover);
}

.kg-flyer-card:focus-visible {
    outline: 2px solid var(--kg-accent);
    outline-offset: 2px;
}

/* 画像エリア（台紙マット＋本物の紙シャドウ） */
.kg-flyer-imgwrap {
    background: linear-gradient(180deg, #f6f5f4 0%, #ebe9e7 100%);
    padding: 16px 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 260px;
    position: relative;
    overflow: hidden;
}

.kg-flyer-imgwrap img {
    display: block;
    width: 100%;
    max-height: 360px;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 4px 14px rgba(22, 21, 20, 0.12);
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.kg-flyer-card:hover .kg-flyer-imgwrap img {
    transform: scale(1.025);
    box-shadow: 0 8px 22px rgba(22, 21, 20, 0.18);
}

/* カード本文 */
.kg-flyer-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 16px 18px 18px;
    gap: 8px;
    background: var(--kg-bg-white);
}

/* 日付 */
.kg-flyer-date {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 700;
    color: var(--kg-text-muted);
}

.kg-flyer-date-icon {
    font-size: 13px;
    opacity: 0.8;
}

/* タイトル */
.kg-flyer-title {
    font-size: 15px;
    font-weight: 800;
    line-height: 1.5;
    color: var(--kg-primary);
    text-wrap: balance;
    margin: 2px 0 6px;
}

/* アクションボタン（ピルボタン風） */
.kg-flyer-btn {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 9px 14px;
    background: var(--kg-bg-soft);
    border: 1px solid var(--kg-border);
    border-radius: var(--kg-radius-pill);
    font-size: 12.5px;
    font-weight: 700;
    color: var(--kg-primary);
    transition: var(--kg-transition);
}

.kg-flyer-card:hover .kg-flyer-btn {
    background: var(--kg-accent);
    border-color: var(--kg-accent);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(67, 65, 62, 0.25);
}

.kg-flyer-btn-arrow {
    font-size: 14px;
    transition: transform 0.2s ease;
}

.kg-flyer-card:hover .kg-flyer-btn-arrow {
    transform: translateX(4px);
}

@media (max-width: 960px) {
    .kg-cards-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
}

@media (max-width: 580px) {
    .kg-cards-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .kg-flyer-imgwrap {
        padding: 12px 10px;
        min-height: 220px;
    }
    .kg-flyer-imgwrap img {
        max-height: 320px;
    }
    .kg-flyer-body {
        padding: 14px 14px 16px;
    }
    .kg-flyer-title {
        font-size: 14.5px;
    }
}