:root {
    /* いとしろカレッジを意識した繊細なパレット */
    --bg: #FDFCF8;
    /* 非常に明るい、温かみのある白 */
    --text-main: #333333;
    /* 墨色。純粋な黒を避ける */
    --text-sub: #777777;
    --accent-green: #4A8B82;
    /* 非常に明るい、透明感のある緑 */
    --accent-clay: #A67C52;
    /* 土や木材を思わせる柔らかなブラウン */
    --border-thin: rgba(0, 0, 0, 0.06);
    --border-dark: rgba(0, 0, 0, 0.2);

    /* タイポグラフィ：緻密な使い分け */
    --font-serif: "Noto Serif JP", "Yu Mincho", serif;
    --font-sans: "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;

    /* 余白とリズム */
    --section-gap: 120px;
    --inner-gap: 40px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg);
    color: var(--text-main);
    font-family: var(--font-sans);
    /* 本文は緻密なサンセリフ */
    line-height: 1.8;
    letter-spacing: 0.04em;
    -webkit-font-smoothing: antialiased;
}

/* 緻密な線の表現 */
.line-accent {
    height: 1px;
    background-color: var(--border-dark);
    width: 60px;
    margin: 20px 0;
}

/* 見出しのデザイン：いとしろ風 */
.title-group {
    margin-bottom: 60px;
}

.jp-title {
    font-family: var(--font-sans);
    font-weight: 700;
    letter-spacing: 0.1em;
}

.serif-subtitle {
    font-family: var(--font-serif);
    font-weight: 500;
    letter-spacing: 0.05em;
}

.en-title {
    font-size: 0.7rem;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: var(--text-sub);
    display: block;
    margin-bottom: 0.5rem;
}

.jp-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 500;
    line-height: 1.4;
}

/* レイアウト：重なりと奥行き */
.grid-wrap {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

section {
    padding: var(--section-gap) 0;
    position: relative;
    overflow: hidden;
}

/* カードと情報の緻密な整理 */
.content-box {
    background: white;
    padding: 40px;
    border: 1px solid var(--border-thin);
    position: relative;
}

/* いとしろ風のカリキュラム表示 */
.step-item {
    display: flex;
    gap: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-thin);
    margin-bottom: 30px;
}

.step-number {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--accent-clay);
    opacity: 0.6;
}

/* CTA: 誠実で静かな主張 */
.cta-area {
    background-color: var(--accent-green);
    color: white;
    padding: 100px 0;
    text-align: center;
}

.btn-itoshiro {
    display: inline-block;
    padding: 20px 60px;
    border: 1px solid white;
    color: white;
    text-decoration: none;
    font-family: var(--font-serif);
    transition: all 0.4s ease;
}

.btn-itoshiro:hover {
    background-color: white;
    color: var(--accent-green);
}

/* 画像：キャプションとの絶妙な配置 */
.img-frame {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    /* overflow: hidden を削除して、キャプションが枠外に正しく表示されるように調整 */
}

.img-placeholder {
    width: 100%;
    aspect-ratio: 4 / 3;
    background-color: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #aaa;
}

.img-frame img {
    border-radius: 20px;
    display: block;
    width: 100%;
    height: auto;
}

.img-caption {
    font-size: 0.75rem;
    color: var(--text-sub);
    margin-top: 15px;
    text-align: center; /* 右寄せから中央揃えに変更 */
}

/* レスポンシブ */
@media (max-width: 768px) {
    .grid-wrap {
        display: block;
        padding: 0 20px;
    }

    .jp-title {
        font-size: 1.5rem;
    }
}

/* Items Grid Layout */
.items-grid {
    gap: 60px 40px;
}

.items-grid .gain-card {
    grid-column: span 4;
}

@media (max-width: 1024px) {
    .items-grid .gain-card {
        grid-column: span 6;
    }
}

@media (max-width: 768px) {
    .items-grid .gain-card {
        grid-column: span 12;
        margin-bottom: 40px;
    }
}

.gain-card {
    display: block;
    width: 100%;
}

.gain-card .img-frame {
    margin-bottom: 30px;
    border-radius: 15px;
    overflow: hidden;
}

.gain-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 15px;
}

.gain-card .number {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--accent-green);
    opacity: 0.3;
}

/* Scroll Animation Styles */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        transform 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: opacity, transform;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ヒーローセクションの背景画像設定 */
.hero-header {
    width: 100%;
    min-height: 80vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 20px 80px 20px;
    background-color: #ffffff;
}

.hero-container {
    position: relative;
    width: 100%;
    max-width: 1200px;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
}

.hero-logo-group {
    position: absolute;
    top: 38%;
    /* さらにわずかに下げて、風景とテキストのバランスを最適化 */
    left: 33%;
    transform: translate(-50%, -50%);
    text-align: left;
    z-index: 10;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    opacity: 0;
    animation: logoFadeIn 2.5s ease-out forwards;
}

@keyframes logoFadeIn {
    from {
        opacity: 0;
        transform: translate(-50%, -46%);
        /* 少し下から浮き上がる演出 */
    }

    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

#hero-logo {
    width: 260px;
    height: auto;
    margin-bottom: 8px;
}

.hero-subtext {
    color: #444;
    font-size: 0.95rem;
    letter-spacing: 0.25em;
    font-weight: 600;
    margin: 0;
    white-space: nowrap;
}

#hero-image {
    width: 100%;
    height: auto;
    max-height: 85vh;
    display: block;
    object-fit: cover;
    border-radius: 24px;
}

@media (max-width: 768px) {
    .hero-header {
        padding: 60px 20px;
        min-height: auto;
    }

    .hero-container {
        padding: 10px;
    }

    #hero-image {
        max-height: 50vh;
    }
}

/* Full Screen Visual Section */
.full-screen-visual {
    height: 100vh;
    width: 100%;
    position: relative;
    background-color: #4a5d4e;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.full-screen-visual .bg-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
    z-index: 0;
}

.full-screen-visual .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    /* 画像の上の暗幕 */
    z-index: 1;
}

.full-screen-visual .visual-content {
    position: relative;
    z-index: 2;
    text-align: left;
    color: white;
    width: 100%;
}

.visual-text-body {
    max-width: 800px;
}

.visual-message {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: 2rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.visual-submessage {
    font-size: 1.1rem;
    letter-spacing: 0.1em;
    opacity: 0.9;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

@media (max-width: 768px) {
    .visual-message {
        font-size: 1.8rem;
    }

    .visual-submessage {
        font-size: 0.9rem;
    }
}

@media (max-width: 768px) {
    .full-screen-visual {
        height: auto;
        padding: 80px 0;
    }
}

/* ヒーローセクションの内容を前面に */
header.hero-header .logo-wrapper,
header.hero-header .grid-wrap,
header.hero-header .title-group,
header.hero-header p {
    position: relative;
    z-index: 10;
    background-color: transparent !important;
}

/* カリキュラムレイアウト：横長・縦並び */
.curriculum-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

.curriculum-card {
    background: #fff;
    padding: 30px 40px;
    border: 1px solid var(--border-thin);
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 30px;
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.curriculum-col-date {
    flex: 0 0 20%;
    display: flex;
    flex-direction: column;
}

.curriculum-col-title {
    flex: 0 0 25%;
}

.curriculum-col-list {
    flex: 1;
}

.curriculum-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-green);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.curriculum-phase {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--accent-green);
    margin-bottom: 0.3rem;
    font-weight: 700;
    display: block;
}

.curriculum-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    margin-bottom: 0;
    line-height: 1.4;
    color: var(--text-main);
}

.curriculum-list {
    list-style: none;
    padding: 0;
    font-size: 0.95rem;
    color: var(--text-main);
    margin-bottom: 0;
}

.curriculum-list li {
    margin-bottom: 0.6rem;
    position: relative;
    padding-left: 16px;
}

.curriculum-list li:last-child {
    margin-bottom: 0;
}

.curriculum-list li::before {
    content: "·";
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-weight: bold;
    font-size: 1.5rem;
    line-height: 1;
    top: -2px;
}

/* レスポンシブ (カリキュラム) */
@media (max-width: 768px) {
    .curriculum-grid {
        padding: 0 20px;
    }
    .curriculum-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
        padding: 25px 20px;
    }
    .curriculum-col-date,
    .curriculum-col-title,
    .curriculum-col-list {
        flex: auto;
        width: 100%;
    }
    .curriculum-col-title {
        border-bottom: 1px solid var(--border-thin);
        padding-bottom: 15px;
    }
}

/* 講師セクション (Instructors inside Curriculum) */
.instructor-section {
    margin-top: 60px;
}

.instructor-section-title {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--text-main);
}

.instructor-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.instructor-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    text-align: center;
}

.instructor-image {
    width: 240px;
    height: 240px;
    flex-shrink: 0;
    border-radius: 0;
    overflow: hidden;
    border: 1px solid var(--border-thin);
}

.inst-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.instructor-info {
    flex-grow: 1;
}

.instructor-role-text {
    font-size: 0.8rem;
    color: var(--accent-green);
    font-weight: bold;
    display: block;
    margin-bottom: 5px;
}

.instructor-name {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--text-main);
}

.instructor-desc {
    font-size: 0.85rem;
    color: var(--text-sub);
    line-height: 1.6;
    text-align: left;
}

@media (max-width: 1024px) {
    .instructor-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 900px;
    }
}

@media (max-width: 768px) {
    .instructor-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .instructor-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

/* 主催者セクション (Organizers) */
.organizer-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.organizer-intro p {
    font-size: 1.1rem;
    line-height: 2;
    color: var(--text-main);
}

.organizer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.organizer-card {
    text-align: center;
}

.organizer-image {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    margin: 0 auto 20px auto;
    background-color: #f0f0f0;
    overflow: hidden;
    border: 1px solid var(--border-thin);
}

.organizer-name {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: var(--text-main);
}

.organizer-role {
    font-size: 0.8rem;
    color: var(--accent-green);
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    font-weight: 700;
    min-height: 45px;
}

.organizer-text {
    font-size: 0.85rem;
    color: var(--text-sub);
    line-height: 1.6;
}

@media (max-width: 1024px) {
    .organizer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .organizer-grid {
        grid-template-columns: 1fr;
    }
}

/* Modal Styles for Full Image Display */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    transform: translateY(20px);
    transition: transform 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-image {
    max-width: 100%;
    max-height: 90vh;
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    border-radius: 4px;
    display: block;
}

.modal-close {
    position: absolute;
    top: -40px;
    right: 0px;
    color: white;
    font-size: 2.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
    line-height: 1;
}

.modal-close:hover {
    color: var(--accent-green);
}

.footer-with-bg {
    padding: 60px 0 40px 0;
    position: relative;
    border-top: 1px solid var(--border-thin);
}

@media (max-width: 768px) {
    .footer-with-bg {
        padding: 40px 0 30px 0;
    }
}

/* New Curriculum Styles */
.curriculum-date { font-size: 0.85rem; font-weight: bold; color: var(--accent-green); margin-bottom: 0.5rem; display: block; }
.curriculum-location { font-size: 0.75rem; color: var(--text-sub); border-top: 1px solid var(--border-thin); padding-top: 10px; margin-top: 10px; margin-bottom: 10px; }
.curriculum-location span { font-weight: bold; color: var(--accent-clay); margin-right: 4px; }