/* EigoDeck 記事ページ共通（瞬間英作文のやり方・旅行英会話フレーズ） */
:root {
    --primary-dark: #1565C0;
    --text-color: #333;
    --bg-color: #f8f9fa;
    --container-bg: #ffffff;
    --border-color: #e0e0e0;
    --intro-bg: #e3f2fd;
    --muted-color: #595959;
    --heading-color: #000;
    --link-color: #1565C0;
    --button-bg: #1565C0;
    --button-text: #ffffff;
}
@media (prefers-color-scheme: dark) {
    :root {
        --primary-dark: #90CAF9;
        --text-color: #e6e6e6;
        --bg-color: #121212;
        --container-bg: #1e1e1e;
        --border-color: #333;
        --intro-bg: #16293a;
        --muted-color: #b8b8b8;
        --heading-color: #fff;
        --link-color: #90CAF9;
        --button-bg: #64B5F6;
        --button-text: #0b1d2d;
    }
}
* { box-sizing: border-box; }
html { scroll-padding-top: 12px; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
}
a { color: var(--link-color); }
a:focus-visible, .btn:focus-visible { outline: 3px solid var(--link-color); outline-offset: 3px; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
h1, h2, h3 { color: var(--heading-color); line-height: 1.45; margin: 0; }

/* header */
.site-head { background: var(--container-bg); border-bottom: 1px solid var(--border-color); }
.site-head .wrap { display: flex; align-items: center; gap: 10px; min-height: 56px; }
.site-head a { display: inline-flex; align-items: center; gap: 10px; min-height: 48px; font-weight: bold; color: var(--heading-color); text-decoration: none; }
.site-head img { width: 32px; height: 32px; border-radius: 8px; }
.crumb { margin-left: auto; font-size: 0.9rem; }
.crumb a { font-weight: normal; color: var(--link-color); text-decoration: underline; }
.byline { margin-top: 12px !important; font-size: 0.88rem; }

/* article */
.article-head { background: var(--intro-bg); padding: 40px 0 32px; }
.article-head h1 { font-size: 1.9rem; margin-bottom: 14px; text-wrap: balance; }
.article-head p { margin: 0; color: var(--muted-color); }
article { padding: 36px 0 24px; }
article h2 { font-size: 1.45rem; margin: 48px 0 14px; padding-bottom: 8px; border-bottom: 2px solid var(--border-color); }
article h2:first-child { margin-top: 0; }
article h3 { font-size: 1.15rem; margin: 28px 0 8px; }
article p { margin: 0 0 16px; }
article ul, article ol { margin: 0 0 16px; padding-left: 1.5em; }
article li { margin-bottom: 6px; }

.toc { background: var(--container-bg); border: 1px solid var(--border-color); border-radius: 12px; padding: 16px 22px; margin-bottom: 36px; }
.toc strong { display: block; margin-bottom: 4px; color: var(--heading-color); }
.toc ol { margin: 0; }
.toc a { display: inline-block; padding: 8px 0; }
.cta-inline { margin: -12px 0 32px; font-weight: bold; }
.cta-inline a { display: inline-block; padding: 8px 0; }
.cta-mid { margin: 32px 0; padding: 18px 20px; text-align: center; background: var(--intro-bg); border-radius: 12px; }
.cta-mid p { margin: 0 0 12px; font-weight: bold; color: var(--heading-color); }

.example { background: var(--container-bg); border: 1px solid var(--border-color); border-left: 5px solid var(--button-bg); border-radius: 8px; padding: 14px 20px; margin: 0 0 20px; }
.example p { margin: 0; }
.example .en { font-weight: bold; color: var(--heading-color); font-size: 1.05rem; }
.example .label { display: inline-block; min-width: 3.2em; font-size: 0.8rem; color: var(--muted-color); }

.note { background: var(--intro-bg); border-radius: 8px; padding: 14px 20px; margin: 0 0 20px; }
.note p:last-child { margin-bottom: 0; }

/* phrase list */
.phrases { list-style: none; margin: 0 0 16px; padding: 0; counter-reset: ph var(--ph-start, 0); }
.phrases li { counter-increment: ph; position: relative; margin: 0 0 12px; padding: 14px 18px 14px 56px; background: var(--container-bg); border: 1px solid var(--border-color); border-radius: 10px; }
.phrases li::before { content: counter(ph); position: absolute; left: 14px; top: 14px; width: 30px; height: 30px; border-radius: 50%; background: var(--button-bg); color: var(--button-text); font-size: 0.85rem; font-weight: bold; line-height: 30px; text-align: center; }
.phrases .en { margin: 0; font-weight: bold; font-size: 1.08rem; color: var(--heading-color); overflow-wrap: anywhere; }
.phrases .ja { margin: 0; }
.phrases .why { margin: 8px 0 0; padding-top: 8px; border-top: 1px dashed var(--border-color); font-size: 0.94rem; line-height: 1.7; color: var(--muted-color); }

/* cta */
.cta-box { margin: 40px 0 0; padding: 28px 24px; text-align: center; background: var(--intro-bg); border-radius: 14px; }
.cta-box h2 { border: 0; margin: 0 0 8px; padding: 0; font-size: 1.3rem; }
.cta-box p { margin: 0 0 18px; }
.btn { display: inline-block; background: var(--button-bg); color: var(--button-text); text-decoration: none; font-weight: bold; padding: 16px 36px; min-height: 48px; font-size: 1.05rem; border-radius: 999px; box-shadow: 0 2px 8px rgba(0,0,0,0.2); }
.btn:hover { opacity: 0.9; }
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 12px 24px; min-height: 48px; font-size: 0.95rem; }
.btn-note { display: block; margin-top: 10px; font-size: 0.9rem; color: var(--muted-color); }

.related { margin: 36px 0 0; padding: 0; list-style: none; }
.related li { margin: 0 0 4px; }
.related a { display: inline-block; padding: 10px 0; }

footer { padding: 32px 0; text-align: center; font-size: 0.9rem; color: var(--muted-color); }
footer nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 0 16px; margin-bottom: 12px; }
footer nav a { display: inline-block; padding: 12px 8px; }

@media (max-width: 720px) {
    .article-head h1 { font-size: 1.5rem; }
    article h2 { font-size: 1.3rem; }
    /* 幅の狭い画面では番号をカード上部に置き、英文の幅を広く使う */
    .phrases li { padding: 12px 14px; }
    .phrases li::before { position: static; display: inline-block; width: auto; min-width: 28px; height: 24px; margin-bottom: 6px; padding: 0 8px; border-radius: 12px; font-size: 0.8rem; line-height: 24px; }
    .btn { padding: 16px 28px; }
}