body {
    font: 16px/1.7 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", sans-serif;
    background: #fdf6f0;
    margin: 0;
    padding: 0;
    color: #333;
}

header {
    background-color: #e9a21e;
    color: white;
    padding: 20px 0;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header h1 {
    margin: 0;
    font-size: 1.8em;
}

.container {
    display: flex;
    max-width: 1000px;
    margin: 40px auto;
    gap: 20px;
}

/* メインを左、サイドバーを右に */
.main-content {
    flex: 1;
    background-color: #ffffff;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    height: fit-content;
}

.main-content h2 {
    color: #e9a21e;
    margin-top: 0;
}

.main-content p {
    margin-bottom: 20px;
}

.main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

h2 {
    padding-bottom: 2px;
    border-bottom: 2px #ff9800 solid;
}

/* 右サイドバー */
.sidebar {
    width: 250px;
    background-color: #ffffff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    height: fit-content;
}

.sidebar h3 {
    margin-top: 0;
    color: #e9a21e;
}

.sidebar ul {
    padding-left: 20px;
}

.sidebar li {
    margin-bottom: 10px;
}

.sidebar a {
    color: #2196f3;
    text-decoration: none;
}

.sidebar a:hover {
    text-decoration: underline;
}

.sidebar2 {
    width: 250px;
    background-color: #ffffff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    height: fit-content;
}

/* トップへ戻る */
.button {
    display: inline-block;
    padding: 10px 25px;
    background-color: #2196f3;
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: 0.2s;
}

.button:hover {
    background-color: #0d47a1;
}

.toc-002 {
    margin-top: 15px;
    margin-bottom: 30px;
    border-radius: 10px;
}

.toc-002 div {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    padding: 10px 0;
    background-color: #2589d0;
    color: #fff;
    font-weight: 600;
    font-size: 1.1em;
}

.toc-002 div::before {
    display: inline-block;
    width: 1em;
    height: 1em;
    margin-right: 5px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M8 4H21V6H8V4ZM3 3.5H6V6.5H3V3.5ZM3 10.5H6V13.5H3V10.5ZM3 17.5H6V20.5H3V17.5ZM8 11H21V13H8V11ZM8 18H21V20H8V18Z' fill='%23fff'%3E%3C/path%3E%3C/svg%3E");
    content: '';
}

/* スマホ対応：縦並びに */
@media (max-width: 800px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
    }

    .right-side {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }
}

.words-title {
    color: #ff9800;
    padding-left: 5px;
    padding-top: 2px;
    font-size: 20px;
}

.sub-content {
    flex: 1;
    background-color: #ffffff;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    height: fit-content;
}

.box-018 {
    position: relative;
    max-width: 100%;
    margin: 0 auto;
    padding: 1em calc(1.5em + 9px);
    border-top: 1px solid #ff9800;
    border-bottom: 1px solid #ff9800;
    color: #333;
    margin-top: 5px;
}

.box-018::before,
.box-018::after {
    position: absolute;
    width: 1px;
    top: 50%;
    transform: translateY(-50%);
    height: calc(100% + 20px);
    background-color: #ff9800;
    content: '';
}

.box-018::before {
    left: 9px;
}

.box-018::after {
    right: 9px;
}

.cycle {
    color: black;
}

.marker {
    background-color: #ff9;
}

.waveline {
    text-decoration: #f00 wavy underline;
}

.term {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.term .word {
    display: inline-block;
    flex: 0 0 auto;
    /* ← 必須：内容に合わせて幅が決まる */
    padding-right: 30px;
    color: red;
    position: relative;
}

/* ••• を自動で表示 */
.term .word::after {
    content: "•••";
    position: absolute;
    right: 0;
    top: 0;
    color: #333;
}

/* 説明文は自由に伸びる */
.term .desc {
    flex: 1;
}

.footer-2 {
    display: flex;
    align-items: center;
    flex-direction: column;
    padding: 25px 10px 10px;
    background-color: #2589d0;
}

.footer-2__logo {
    width: 130px;
    height: 30px;
}

.footer-2__list {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0 1.5em;
    list-style-type: none;
    margin: 0 0 .5em;
    padding: .5em;
}

.footer-2__sns-icon {
    width: 21px;
    height: 21px;
}

.footer-2__copyright {
    margin: 0;
    color: #ffffffb3;
    font-weight: 200;
    font-size: .8em;
}

.revolution-wrapper {
    margin-top: 40px
}

/* 年表の1行 */
.timeline-item {
    display: flex;
    padding: 12px 0;
}

.timeline-item:last-child {
    border-bottom: none;
}

/* 左：年代 */
.timeline-item .year {
    width: 120px;
    font-weight: bold;
    margin: 0;
    padding-right: 15px;
    position: relative;
}

/* ◀ この部分が年代と出来事の間に縦線を作る */
.timeline-item .year::after {
    content: "";
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    border-right: 2px solid #aaa;  /* ← 太さ・色はここで調整可能 */
}

/* 右：出来事 */
.timeline-item .event {
    flex: 1;
    padding-left: 15px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

/* タイトル（ピューリタン革命） */
.timeline-item .event-title {
    color: #e9a21e;
    font-size: 18px;
    margin: 0;
}

/* 説明文（•••付き） */
.timeline-item .event-desc {
    margin: 0;
    padding-left: 28px;
    position: relative;
    line-height: 1.6;
}

.timeline-item .event-desc::before {
    content: "•••";
    position: absolute;
    left: 0;
    top: 0;
    color: #555;
}