/* 読み物ページ（文法解説・運営者情報・プライバシーポリシー）共通 */
:root {
  --bg: #120e24;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-strong: rgba(255, 255, 255, 0.1);
  --line: rgba(255, 255, 255, 0.14);
  --text: #f4f1ff;
  --muted: #b3acd6;
  --accent: #ff4f9a;
  --accent2: #36d6ff;
  --good: #7cf29c;
  --bad: #ff8a98;
  --gold: #ffd25e;
}

* { box-sizing: border-box; }

html { background: var(--bg); }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(120% 40% at 50% -10%, #3a2a85 0%, transparent 60%),
    var(--bg);
  font-family: system-ui, -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.85;
}

a { color: var(--accent2); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 760px;
  margin: 0 auto;
  padding: max(14px, env(safe-area-inset-top)) 16px 14px;
}
.brand {
  font-size: 20px;
  font-weight: 900;
  text-decoration: none;
  background: linear-gradient(90deg, var(--accent), #b98bff 50%, var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.site-header nav { display: flex; gap: 14px; font-size: 14px; font-weight: 700; }
.site-header nav a { color: var(--text); text-decoration: none; }

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 16px 40px;
}

.crumb { margin: 0; font-size: 13px; color: var(--muted); }
h1 { margin: 6px 0 12px; font-size: 28px; line-height: 1.4; }
h2 {
  margin: 36px 0 12px;
  padding-left: 10px;
  border-left: 4px solid var(--accent);
  font-size: 20px;
  line-height: 1.4;
}
h3 { margin: 24px 0 8px; font-size: 17px; }
p { margin: 0 0 14px; }
.lead { font-size: 17px; }
.muted { color: var(--muted); font-size: 14px; }
ul, ol { padding-left: 1.4em; }
li { margin-bottom: 6px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--muted); font-size: 13px; font-weight: 700; white-space: nowrap; }
td:first-child { font-weight: 700; white-space: nowrap; }

.examples { list-style: none; padding: 0; display: grid; gap: 10px; }
.examples li { margin: 0; padding: 12px 14px; border-radius: 12px; background: var(--panel); }
.examples .en { font-weight: 700; font-size: 17px; }
.examples .ja { color: var(--muted); font-size: 14px; }
.examples .note { margin-top: 4px; font-size: 14px; }

.mistakes { list-style: none; padding: 0; display: grid; gap: 10px; }
.mistakes li { margin: 0; padding: 12px 14px; border-radius: 12px; background: var(--panel); }
.ng { color: var(--bad); font-weight: 700; }
.ok { color: var(--good); font-weight: 700; }
.mistakes .why { margin-top: 4px; font-size: 14px; }

.cta {
  display: block;
  margin: 32px 0 8px;
  padding: 16px;
  border-radius: 14px;
  background: linear-gradient(90deg, var(--accent), #a35cff);
  color: #fff;
  font-weight: 800;
  text-align: center;
  text-decoration: none;
}

.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 20px; font-size: 14px; }

.topic-group { margin-top: 28px; }
.topic-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; padding: 0; list-style: none; }
.topic-list li { margin: 0; }
.topic-list a {
  display: block;
  height: 100%;
  padding: 14px;
  border-radius: 12px;
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
}
.topic-list b { display: block; margin-bottom: 4px; color: var(--accent2); }
.topic-list span { display: block; font-size: 13px; line-height: 1.6; color: var(--muted); }

.info dt { margin-top: 14px; font-size: 13px; font-weight: 700; color: var(--muted); }
.info dd { margin: 2px 0 0; }

.site-footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 16px max(32px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-bottom: 10px; }
.site-footer a { color: var(--muted); }