@charset "utf-8";
/* CSS Document */

@charset "UTF-8";

:root {
    --color-main: #7a2f2f;
    --color-sub: #b65b5b;
    --color-accent: #f3e3e3;
    --color-bg: #f8f6f3;
    --color-white: #ffffff;
    --color-text: #333333;
    --color-border: #e2d8d8;
    --shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
    --radius-lg: 20px;
    --radius-md: 12px;
    --content-width: 1000px;
    --font-base: "Noto Sans JP", sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-base);
    color: var(--color-text);
    background:
        linear-gradient(180deg, #efe7e7 0%, #f8f6f3 220px, #f8f6f3 100%);
    line-height: 1.8;
}

.page-wrap {
    width: min(100% - 32px, var(--content-width));
    margin: 0 auto;
    padding: 48px 0 72px;
}

.hero {
    background: linear-gradient(135deg, var(--color-main), #9f4d4d);
    color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    box-shadow: var(--shadow);
    margin-bottom: 32px;
}

.event-label {
    margin: 0 0 12px;
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    opacity: 0.9;
}

.hero h1 {
    margin: 0 0 16px;
    font-size: clamp(2rem, 2vw, 3rem);
    line-height: 1.4;
    font-weight: 700;
}

.theme {
    margin: 0;
    font-size: 1.4rem;
    opacity: 0.95;
}

.info-card {
    display: block;
}

.info-block {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border);
	margin-bottom: 1em;
}

.info-block h2 {
    margin: 0 0 20px;
    font-size: 2rem;
    color: var(--color-main);
    border-left: 6px solid var(--color-sub);
    padding-left: 12px;
    line-height: 1.4;
}

.info-list {
    margin: 0;
}

.info-list div {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 12px;
    align-items: start;
}

.info-list dt {
    font-weight: 700;
    color: var(--color-main);
}

.info-list dd {
    margin: 0;
}

.chair-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.chair-list li {
    padding: 16px 0;
    border-bottom: 1px solid var(--color-border);
}

.chair-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.name {
    display: block;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.affiliation {
    display: block;
    font-size: 1.2rem;
    color: #666666;
    line-height: 1.7;
}

.message-section {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border);
}

.section-heading {
    margin-bottom: 24px;
}

.section-heading-en {
    display: inline-block;
    margin-bottom: 8px;
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--color-sub);
}

.section-heading h2 {
    margin: 0;
    font-size: 2rem;
    color: var(--color-main);
    line-height: 1.4;
}

.message-box {
    background: var(--color-bg);
    border: 1px solid #eadede;
    border-radius: var(--radius-md);
    padding: 28px;
}

.message-box p {
    margin: 0;
    font-size: 1.2rem;
    text-align: justify;
}

@media (max-width: 768px) {
    .page-wrap {
        width: min(100% - 24px, var(--content-width));
        padding: 24px 0 48px;
    }

    .hero {
        padding: 32px 24px;
    }

    .info-card {
        grid-template-columns: 1fr;
    }

    .info-block,
    .message-section {
        padding: 24px;
    }

    .info-list div {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .hero h1 {
        font-size: 2.8rem;
    }

    .section-heading h2 {
        font-size: 2.2rem;
    }

    .message-box p {
        font-size: 1.5rem;
    }
}