:root {
    --bg: #f4f3ef;
    --surface: #ffffff;
    --surface-soft: #ebeae5;
    --ink: #17211d;
    --muted: #65706b;
    --line: #d9ddd8;
    --brand: #315f52;
    --brand-dark: #20453b;
    --accent: #d9e5df;
    --shadow: 0 12px 32px rgba(23, 33, 29, 0.07);
    --radius: 20px;
}

* {
    box-sizing: border-box;
}

html {
    color-scheme: light;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}

a {
    color: inherit;
}

.shell {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid rgba(217, 221, 216, 0.9);
    background: rgba(244, 243, 239, 0.94);
    backdrop-filter: blur(14px);
}

.site-header__inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--ink);
    text-decoration: none;
}

.brand__mark {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    background: var(--brand);
    color: #fff;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.brand strong,
.brand small {
    display: block;
}

.brand strong {
    font-size: 1.03rem;
}

.brand small {
    color: var(--muted);
    font-size: 0.76rem;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 22px;
    font-size: 0.92rem;
}

.site-nav a {
    text-decoration: none;
    font-weight: 700;
}

.site-nav__muted {
    color: var(--muted);
}

.hero {
    border-bottom: 1px solid var(--line);
    background:
        radial-gradient(circle at 86% 15%, rgba(49, 95, 82, 0.16), transparent 30%),
        linear-gradient(180deg, #fbfbf8 0%, var(--bg) 100%);
}

.hero__inner {
    padding: 88px 0 72px;
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--brand);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.hero h1,
.detail h1 {
    margin: 0;
    max-width: 880px;
    font-size: clamp(2.25rem, 6vw, 5rem);
    line-height: 0.98;
    letter-spacing: -0.055em;
}

.hero__lead {
    max-width: 760px;
    margin: 26px 0 0;
    color: #43504a;
    font-size: clamp(1.05rem, 2.1vw, 1.28rem);
}

.hero__chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 34px;
}

.hero__chips span,
.event-card__meta span {
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
}

.hero__chips span {
    padding: 9px 13px;
    color: #43504a;
    font-size: 0.86rem;
}

.section {
    padding: 64px 0 92px;
}

.section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 30px;
    margin-bottom: 28px;
}

.section-heading h2 {
    margin: 0;
    font-size: clamp(1.7rem, 3vw, 2.6rem);
    letter-spacing: -0.035em;
}

.section-heading > p {
    margin: 0 0 5px;
    color: var(--muted);
}

.event-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.event-card {
    min-width: 0;
    display: grid;
    grid-template-columns: 102px minmax(0, 1fr);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.event-card__date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 22px 12px;
    border-right: 1px solid var(--line);
    background: var(--surface-soft);
    text-align: center;
}

.event-card__date strong {
    font-size: 2.4rem;
    line-height: 1;
    letter-spacing: -0.05em;
}

.event-card__date span {
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.9rem;
}

.event-card__date small {
    margin-top: 12px;
    color: var(--brand-dark);
    font-weight: 800;
}

.event-card__body {
    min-width: 0;
    padding: 22px 24px;
}

.event-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-bottom: 13px;
}

.event-card__meta span {
    padding: 5px 9px;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 700;
}

.event-card h3 {
    margin: 0;
    font-size: 1.35rem;
    line-height: 1.16;
    letter-spacing: -0.025em;
}

.event-card h3 a {
    text-decoration: none;
}

.event-card h3 a:hover,
.event-card h3 a:focus-visible,
.info-card a:hover,
.back-link:hover {
    color: var(--brand);
}

.event-card__place {
    margin: 10px 0 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.event-card__bottom {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 16px;
    margin-top: 26px;
}

.price {
    color: var(--brand-dark);
    font-size: 0.96rem;
}

.source-label {
    max-width: 58%;
    color: var(--muted);
    font-size: 0.72rem;
    text-align: right;
}

.empty-state {
    padding: 54px;
    border: 1px dashed #bdc5bf;
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.52);
    text-align: center;
}

.empty-state h3 {
    margin: 0;
    font-size: 1.35rem;
}

.empty-state p {
    max-width: 660px;
    margin: 12px auto 0;
    color: var(--muted);
}

.detail {
    padding: 54px 0 90px;
}

.back-link {
    display: inline-block;
    margin-bottom: 34px;
    color: var(--muted);
    text-decoration: none;
    font-weight: 700;
}

.detail__layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 54px;
    align-items: start;
}

.detail h1 {
    max-width: 900px;
    font-size: clamp(2.25rem, 5vw, 4.5rem);
}

.detail__description {
    max-width: 780px;
    margin: 28px 0 46px;
    color: #3f4d47;
    font-size: 1.04rem;
}

.detail__description p {
    margin: 0 0 1em;
}

.muted {
    color: var(--muted);
}

.detail h2 {
    margin: 0 0 18px;
    font-size: 1.45rem;
}

.session-list {
    border-top: 1px solid var(--line);
}

.session-row {
    display: grid;
    grid-template-columns: minmax(150px, 0.8fr) minmax(220px, 1.5fr) auto;
    gap: 22px;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--line);
}

.session-row strong,
.session-row span {
    display: block;
}

.session-row span {
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.86rem;
}

.button {
    display: inline-flex;
    min-height: 42px;
    align-items: center;
    justify-content: center;
    padding: 0 16px;
    border-radius: 12px;
    background: var(--brand);
    color: #fff;
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 800;
}

.button:hover,
.button:focus-visible {
    background: var(--brand-dark);
}

.detail__aside {
    position: sticky;
    top: 100px;
    display: grid;
    gap: 12px;
}

.info-card,
.notice {
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface);
}

.info-card {
    padding: 20px;
}

.info-card__label,
.info-card strong,
.info-card a,
.info-card small {
    display: block;
}

.info-card__label {
    margin-bottom: 7px;
    color: var(--muted);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.info-card strong {
    font-size: 1.02rem;
}

.info-card a {
    margin-top: 12px;
    color: var(--brand-dark);
    font-size: 0.87rem;
    font-weight: 800;
    text-decoration: none;
}

.info-card small {
    margin-top: 8px;
    color: var(--muted);
}

.notice {
    padding: 18px 20px;
    color: var(--muted);
    font-size: 0.82rem;
}

.site-footer {
    border-top: 1px solid var(--line);
    background: #e9e8e2;
}

.site-footer__inner {
    display: flex;
    justify-content: space-between;
    gap: 32px;
    padding: 34px 0 40px;
    color: var(--muted);
    font-size: 0.85rem;
}

.site-footer strong {
    color: var(--ink);
}

.site-footer p {
    max-width: 520px;
    margin: 5px 0 0;
}

@media (max-width: 920px) {
    .event-grid {
        grid-template-columns: 1fr;
    }

    .detail__layout {
        grid-template-columns: 1fr;
    }

    .detail__aside {
        position: static;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .notice {
        grid-column: 1 / -1;
    }
}

@media (max-width: 640px) {
    .shell {
        width: min(100% - 28px, 1180px);
    }

    .site-header__inner {
        min-height: 66px;
    }

    .brand__mark {
        width: 36px;
        height: 36px;
        border-radius: 12px;
    }

    .site-nav__muted {
        display: none;
    }

    .hero__inner {
        padding: 58px 0 52px;
    }

    .hero h1,
    .detail h1 {
        line-height: 1.03;
    }

    .section {
        padding: 46px 0 70px;
    }

    .section-heading {
        display: block;
    }

    .section-heading > p {
        margin-top: 9px;
    }

    .event-card {
        grid-template-columns: 78px minmax(0, 1fr);
        border-radius: 16px;
    }

    .event-card__date {
        padding: 18px 8px;
    }

    .event-card__date strong {
        font-size: 2rem;
    }

    .event-card__body {
        padding: 18px 16px;
    }

    .event-card h3 {
        font-size: 1.15rem;
    }

    .event-card__bottom {
        display: block;
        margin-top: 20px;
    }

    .source-label {
        display: block;
        max-width: none;
        margin-top: 7px;
        text-align: left;
    }

    .detail {
        padding-top: 34px;
    }

    .detail__description {
        margin-bottom: 34px;
    }

    .session-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .session-row .button {
        justify-self: start;
    }

    .detail__aside {
        grid-template-columns: 1fr;
    }

    .empty-state {
        padding: 36px 22px;
    }

    .site-footer__inner {
        display: block;
    }

    .site-footer__inner > p {
        margin-top: 18px;
    }
}