:root {
    --bg: #f7f7f4;
    --card: #fff;
    --ink: #20201e;
    --muted: #74736d;
    --line: #deddd7;
    --accent: #9a3b28;
    --soft: #e1f7e3
}

* {
    box-sizing: border-box
}

html {
    scroll-behavior: smooth
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
    line-height: 1.8
}

a {
    color: inherit
}

header {
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 880px;
    margin: auto;
    padding: 0 22px;
    border-bottom: 1px solid var(--line)
}

header .brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 900;
    text-decoration: none;
    font-size: 20px
}

header .brand img {
    display: block;
    width: 38px;
    height: 38px;
    flex: 0 0 auto
}

header nav {
    display: flex;
    gap: 18px
}

header nav a {
    font-size: 14px;
    color: var(--muted);
    text-decoration: none
}

main {
    max-width: 880px;
    margin: auto;
    padding: 24px 20px 40px
}

.hero {
    padding: 20px 0 14px
}

.hero.compact {
    padding-top: 20px
}

.eyebrow {
    letter-spacing: .17em;
    font-size: 12px;
    color: var(--accent);
    font-weight: 800;
    margin: 0
}

.hero h1,
.article h1 {
    font-size: clamp(34px, 6vw, 58px);
    line-height: 1.25;
    margin: 0 0 8px;
    letter-spacing: -.03em
}

.hero p {
    max-width: 680px;
    margin: 0;
    color: var(--muted)
}

.summary {
    background: var(--soft);
    border-radius: 14px;
    padding: 14px 18px;
    margin: 12px 0;
}

.share {
    display: flex;
    justify-content: flex-end;
    margin: 14px 0 20px
}

.x-share-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 16px;
    border-radius: 999px;
    background: #0f1419;
    color: #fff;
    font-size: 14px;
    font-weight: 750;
    line-height: 1.4;
    text-decoration: none;
    transition: opacity .15s, transform .15s
}

.x-share-button:hover {
    opacity: .82;
    transform: translateY(-1px)
}

.x-share-button span {
    font-size: 17px
}

.event-list h2,
.month h2 {
    font-size: 18px;
    margin: 34px 0 12px
}

.event-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 4px 12px;
    margin: 8px 0;
    text-decoration: none;
    font-weight: 650;
    transition: .15s
}

.event-card:hover {
    transform: translateY(-1px);
    border-color: #bcb9af
}

.event-card b {
    color: var(--accent);
    font-size: 24px
}

.day-nav {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin: 20px 0
}

.day-nav a,
.back-link a {
    color: var(--accent);
    font-weight: 700;
    text-decoration: none
}

.error {
    background: #fff0ed;
    border: 1px solid #e8b4aa;
    padding: 18px;
    border-radius: 12px
}

.breadcrumbs {
    display: flex;
    gap: 9px;
    flex-wrap: wrap;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 28px
}

.breadcrumbs a {
    color: var(--muted)
}

.article {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 24px
}

.article .category {
    font-size: 13px;
    color: var(--accent);
    font-weight: 800
}

.article h1 {
    font-size: clamp(30px, 5vw, 48px)
}

.lead {
    font-size: 18px;
    font-weight: 600;
    padding: 20px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line)
}

.article section {
    margin-top: 36px
}

.article section h2 {
    font-size: 23px;
    line-height: 1.4
}

.facts {
    padding-left: 22px
}

.related {
    display: grid;
    gap: 9px
}

.related a {
    display: flex;
    justify-content: space-between;
    text-decoration: none;
    background: var(--bg);
    padding: 13px 15px;
    border-radius: 10px;
    font-weight: 650
}

.sources {
    font-size: 14px;
    color: var(--muted);
    border-top: 1px solid var(--line);
    padding-top: 20px
}

.sources a {
    color: var(--muted)
}

.month {
    margin-top: 40px
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 7px
}

.calendar-grid a,
.calendar-grid span {
    min-height: 65px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 9px;
    padding: 8px;
    text-decoration: none;
    display: flex;
    flex-direction: column
}

.calendar-grid span {
    opacity: .45
}

.calendar-grid small {
    font-size: 10px;
    color: var(--muted);
    margin-top: auto
}

footer {
    border-top: 1px solid var(--line);
    text-align: center;
    color: var(--muted);
    font-size: 12px;
    padding: 30px 20px
}

@media(max-width:600px) {
    header {
        height: 60px
    }

    .hero {
        padding-top: 20px
    }

    .calendar-grid {
        grid-template-columns: repeat(5, 1fr)
    }

    .article {
        padding: 22px 18px
    }

    .day-nav {
        font-size: 13px
    }
}