/* ========================================================= article-base.css — 記事HTML が読み込む共通スタイル記事側はの1行でよい。教科色は記事ので切り替わる。 ========================================================= */ :root { --ink: #22313f; --ink-soft: #5d7184; --line: rgba(34, 49, 63, .10); --shadow: 0 8px 24px rgba(34, 49, 63, .07); --sc: #6B7280; /* subject color */ --sc-light: #f1f3f5; --sc-deep: #3f4750; } body[data-subject="国語"] { --sc: #E8544B; --sc-light: #FDEDEC; --sc-deep: #9c2f28; } body[data-subject="算数"] { --sc: #3B82D6; --sc-light: #E8F1FE; --sc-deep: #1d4f8c; } body[data-subject="理科"] { --sc: #2FAE6B; --sc-light: #E6F7EE; --sc-deep: #1a6b41; } body[data-subject="社会"] { --sc: #E89A2B; --sc-light: #FDF3E3; --sc-deep: #96600f; } body[data-subject="生活"] { --sc: #E56A9B; --sc-light: #FDEEF4; --sc-deep: #a13565; } body[data-subject="英語"] { --sc: #8B5CF6; --sc-light: #F1EBFE; --sc-deep: #5b32b8; } * { box-sizing: border-box; } body { margin: 0; font-family: system-ui, -apple-system, "Hiragino Sans", "Meiryo", sans-serif; font-size: 18px; line-height: 1.95; color: var(--ink); background: #f6f8fb; } .page { max-width: 860px; margin: 0 auto; padding: 22px 16px 56px; } /* ---- 見出し ---- */ .hero { background: linear-gradient(135deg, var(--sc-light), #fff); border-radius: 24px; padding: 24px; box-shadow: var(--shadow); margin-bottom: 20px; } .chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; } .chip { font-size: .85rem; font-weight: 800; color: #fff; background: var(--sc); border-radius: 999px; padding: 4px 14px; } .chip.plain { background: #fff; color: var(--sc-deep); border: 2px solid var(--sc-light); } h1 { margin: 0 0 10px; font-size: clamp(1.6rem, 4.5vw, 2.2rem); line-height: 1.4; color: var(--sc-deep); } .lead { margin: 0; font-size: 1.02rem; color: var(--ink); } section { background: #fff; border-radius: 20px; padding: 22px; box-shadow: var(--shadow); margin-bottom: 18px; } h2 { margin: 0 0 14px; font-size: 1.3rem; color: var(--sc-deep); padding-bottom: 8px; border-bottom: 3px solid var(--sc-light); } h3 { margin: 20px 0 8px; font-size: 1.08rem; color: var(--sc-deep); } p { margin: 0 0 14px; } p:last-child { margin-bottom: 0; } /* ---- 部品 ---- */ .note { background: var(--sc-light); border-left: 6px solid var(--sc); border-radius: 14px; padding: 14px 18px; margin: 16px 0; } .note.warn { background: #fff4e5; border-left-color: #e8912b; } .note.tip { background: #e9f7ef; border-left-color: #2fae6b; } .note p:last-child { margin-bottom: 0; } .note .label { font-weight: 800; display: block; margin-bottom: 4px; color: var(--sc-deep); } .note.warn .label { color: #96600f; } .note.tip .label { color: #1a6b41; } ul, ol { margin: 0 0 14px; padding-left: 1.4em; } li { margin-bottom: 8px; } .steps { list-style: none; padding: 0; counter-reset: st; } .steps > li { position: relative; counter-increment: st; background: #fff; border: 2px solid var(--sc-light); border-radius: 14px; padding: 14px 16px 14px 56px; margin-bottom: 10px; } .steps > li::before { content: counter(st); position: absolute; left: 14px; top: 12px; width: 30px; height: 30px; border-radius: 50%; background: var(--sc); color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center; } .calc { font-family: "Consolas", "Courier New", monospace; background: #f8fafc; border: 2px solid var(--sc-light); border-radius: 12px; padding: 14px 18px; font-size: 1.05rem; line-height: 1.7; overflow-x: auto; white-space: pre; margin: 12px 0; } table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: .96rem; } .table-wrap { overflow-x: auto; } th, td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; } th { background: var(--sc-light); color: var(--sc-deep); font-weight: 800; } .qa { border: 2px dashed var(--sc); border-radius: 16px; padding: 16px 18px; margin: 14px 0; background: #fff; } .qa .q { font-weight: 800; color: var(--sc-deep); margin-bottom: 6px; } .qa .a { margin: 0; } .summary-box { background: linear-gradient(180deg, #fff, var(--sc-light)); } ruby rt { color: var(--ink-soft); font-size: .58em; font-weight: 400; } @media (max-width: 599px) { body { font-size: 17px; } .page { padding: 14px 12px 32px; } .hero, section { padding: 17px; border-radius: 16px; } }