/* 英検・入試テーマのコーナー（/genre/exam/ のハブと /exam/<テーマ>/）。build.mjs の「英検・入試テーマのコーナー」が、このページだけ読みこむ
   色は style.css のトークン（--card・--ink・--line など）と、テーマの分野の色 --c */

/* ---- ハブ：3ステップ ---- */
.ex-hub {
  margin: 28px 0 56px;
}
.ex-steps {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.ex-steps li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px;
  box-shadow: var(--shadow);
  font-size: 14px;
  color: var(--ink2);
  line-height: 1.6;
}
.ex-steps li > b {
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #1971c2;
  color: #fff;
  font: 800 17px/1 var(--display);
}
.ex-steps strong {
  display: block;
  color: var(--ink);
  font-size: 16px;
  font-family: var(--round);
}

/* ---- タブ ---- */
.ex-tabs {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 4px;
  margin: 0 0 18px;
  background: var(--bg2);
  border-radius: 999px;
  scrollbar-width: none;
}
.ex-tabs::-webkit-scrollbar {
  display: none;
}
.ex-tabs button {
  flex: 1 0 auto;
  border: 0;
  background: transparent;
  color: var(--ink2);
  font: 800 15px/1 var(--jp);
  padding: 12px 16px;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  gap: 6px;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}
.ex-tabs button[aria-selected='true'] {
  background: var(--card);
  color: #1971c2;
  box-shadow: var(--shadow);
}
.ex-tabs .emo {
  width: 20px;
  height: 20px;
}
.ex-js .ex-panel {
  display: none;
}
.ex-js .ex-panel.on {
  display: block;
  animation: ex-in 0.25s ease;
}
.ex-js .ex-panel-h {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}
@keyframes ex-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
}

/* ---- テーマのタイル ---- */
.ex-cat-h {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 19px;
  margin: 26px 0 12px;
  padding-left: 12px;
  border-left: 5px solid var(--c);
}
.ex-cat-h:first-child {
  margin-top: 4px;
}
.ex-cat-h small {
  font: 700 13px/1 var(--jp);
  color: var(--muted);
}
.ex-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(230px, 100%), 1fr));
  gap: 14px;
}
.ex-tiles.small {
  grid-template-columns: repeat(auto-fill, minmax(min(190px, 100%), 1fr));
}
.ex-tile {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  text-decoration: none;
  color: var(--ink);
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.ex-tile:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  color: var(--ink);
}
.ex-tile-img {
  position: relative;
  aspect-ratio: 16/9;
  background: var(--bg2);
  overflow: hidden;
  border-bottom: 4px solid var(--c);
}
.ex-tile-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.ex-tile:hover .ex-tile-img img {
  transform: scale(1.05);
}
.ex-tile-img i {
  position: absolute;
  left: 10px;
  bottom: -18px;
  font-style: normal;
  font-size: 24px;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  background: var(--card);
  border-radius: 50%;
  border: 3px solid var(--c);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}
.ex-tile-img i .emo {
  width: 32px;
  height: 32px;
}
.ex-tile-in {
  display: grid;
  gap: 2px;
  padding: 24px 14px 12px;
}
.ex-tile-in b {
  font-size: 16px;
  line-height: 1.35;
  font-family: var(--round);
}
.ex-tile-in small {
  color: var(--c);
  font: 800 12px/1.3 var(--display);
  letter-spacing: 0.04em;
}
.ex-tile-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}
.ex-tile-meta span {
  font-size: 12px;
  font-weight: 700;
  color: var(--ink2);
  background: var(--bg2);
  border-radius: 999px;
  padding: 3px 9px;
}

/* ---- 英検の級 ---- */
.ex-gsel {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 16px;
}
.ex-gsel button {
  border: 2px solid var(--line);
  background: var(--card);
  color: var(--ink);
  border-radius: 14px;
  padding: 12px 6px;
  cursor: pointer;
  display: grid;
  gap: 3px;
  font-family: var(--jp);
}
.ex-gsel button b {
  font: 900 clamp(17px, 3vw, 22px) / 1.1 var(--round);
  color: var(--c);
}
.ex-gsel button small {
  font-size: 12px;
  color: var(--muted);
  font-weight: 700;
}
.ex-gsel button[aria-pressed='true'] {
  border-color: var(--c);
  background: var(--c);
}
.ex-gsel button[aria-pressed='true'] b,
.ex-gsel button[aria-pressed='true'] small {
  color: #fff;
}
.ex-gp-info {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 5px solid var(--c);
  border-radius: 16px;
  padding: 16px 18px;
  margin: 0 0 14px;
  box-shadow: var(--shadow);
}
.ex-gp-big {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  margin: 0 0 10px;
}
.ex-gp-big b {
  font: 900 26px/1 var(--round);
  color: var(--c);
}
.ex-gp-big span {
  color: var(--muted);
  font-weight: 700;
  font-size: 14px;
}
.ex-gp-info dl {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}
.ex-gp-info dl div {
  background: var(--bg2);
  border-radius: 12px;
  padding: 10px 12px;
}
.ex-gp-info dt {
  font-size: 12px;
  font-weight: 800;
  color: var(--c);
}
.ex-gp-info dd {
  margin: 2px 0 0;
  font-size: 14px;
  line-height: 1.55;
}
.ex-tip {
  margin: 12px 0 0;
  font-size: 14px;
  color: var(--ink2);
}
.ex-prompts {
  margin: 4px 0 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 4px 16px;
}
.ex-prompts summary {
  cursor: pointer;
  font-weight: 800;
  padding: 10px 0;
}
.ex-prompts ul {
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}
.ex-prompts li {
  display: grid;
  gap: 2px;
  padding: 10px 0;
  border-top: 1px dashed var(--line);
}
.ex-prompts li span {
  font-family: var(--serif);
  font-size: 16px;
}
.ex-prompts li small {
  color: var(--muted);
}
.ex-prompts li a {
  font-size: 13px;
  font-weight: 700;
}
.ex-prompts .emo {
  width: 18px;
  height: 18px;
  vertical-align: -3px;
}

/* ---- 賛成・反対 ---- */
.ex-deb-list {
  display: grid;
  gap: 10px;
}
.ex-deb {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 5px solid var(--c);
  border-radius: 14px;
  box-shadow: var(--shadow);
}
.ex-deb summary {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 12px 16px;
  cursor: pointer;
  list-style: none;
}
.ex-deb summary::-webkit-details-marker {
  display: none;
}
.ex-deb summary::after {
  content: '＋';
  margin-left: auto;
  color: var(--c);
  font-weight: 900;
  flex: none;
}
.ex-deb[open] summary::after {
  content: '−';
}
.ex-deb summary .ic {
  font-size: 26px;
  flex: none;
}
.ex-deb summary .ic .emo {
  width: 34px;
  height: 34px;
}
.ex-deb .q {
  display: grid;
  gap: 2px;
  min-width: 0;
}
.ex-deb .q b {
  font-family: var(--serif);
  font-size: 17px;
}
.ex-deb .q small {
  color: var(--muted);
}
.ex-deb .ex-pc {
  padding: 0 16px;
}
.ex-deb-go {
  margin: 4px 16px 14px;
  font-weight: 700;
  font-size: 14px;
}
.ex-q {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px 18px;
  margin: 0 0 14px;
  box-shadow: var(--shadow);
}
.ex-q b {
  font: 700 clamp(18px, 2.4vw, 22px) / 1.4 var(--serif);
}
.ex-q small {
  flex-basis: 100%;
  color: var(--muted);
}
.ex-pc {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.ex-pc-col {
  background: var(--bg2);
  border-radius: 14px;
  padding: 12px 14px;
}
.ex-pc-col.pro {
  border-top: 4px solid #2f9e44;
}
.ex-pc-col.con {
  border-top: 4px solid #e03131;
}
.ex-pc-col h4 {
  margin: 0 0 6px;
  font: 800 16px/1.3 var(--round);
}
.ex-pc-col h4 small {
  color: var(--muted);
  font: 700 12px/1 var(--display);
}
.ex-pcl {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 4px;
}
.ex-pcl li {
  padding: 8px 0;
  border-top: 1px dashed var(--line);
}
.ex-pcl li:first-child {
  border-top: 0;
}
.ex-pcl li > span {
  font: 16px/1.6 var(--serif);
  margin-right: 6px;
}
.ex-ja,
.ex-pcl small,
.ex-prompt-list small {
  display: block;
  color: var(--muted);
  font-size: 13.5px;
  margin-top: 2px;
}
.ex-hideja .ex-ja {
  visibility: hidden;
}
.ex-jatoggle {
  margin: 12px 0 0;
}
.ex-jatoggle button {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink2);
  border-radius: 999px;
  padding: 8px 14px;
  font: 700 13px/1 var(--jp);
  cursor: pointer;
}
.ex-jatoggle button[aria-pressed='true'] {
  background: var(--ink);
  color: var(--bg);
}

/* ---- 音声ボタン ---- */
.ex-au {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border: 0;
  background: #1971c2;
  color: #fff;
  border-radius: 999px;
  padding: 5px 11px 5px 9px;
  font: 800 12px/1 var(--jp);
  cursor: pointer;
  vertical-align: 2px;
  white-space: nowrap;
}
.ex-au span {
  font-size: 10px;
}
.ex-au.on {
  background: #c2255c;
}
.ex-au:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}

/* ---- 英作文 ---- */
.ex-prompt-list {
  display: grid;
  gap: 8px;
  margin: 0 0 18px;
}
.ex-prompt-list p {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 14px;
}
.ex-prompt-list b {
  font: 600 16px/1.5 var(--serif);
  margin-right: 6px;
}
.ex-grade {
  flex: none;
  display: inline-block;
  background: var(--c);
  color: #fff;
  font: 800 12px/1 var(--jp);
  padding: 6px 9px;
  border-radius: 8px;
  white-space: nowrap;
}
.ex-models {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(420px, 100%), 1fr));
  gap: 16px;
}
.ex-model {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 5px solid var(--c);
  border-radius: 16px;
  padding: 16px 18px;
  box-shadow: var(--shadow);
}
.ex-model-h {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
}
.ex-model-h .wc {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  margin-right: auto;
}
.ex-model-q {
  margin: 0 0 10px;
  padding: 10px 12px;
  background: var(--bg2);
  border-radius: 10px;
}
.ex-model-q b {
  display: block;
  font: 700 16px/1.5 var(--serif);
}
.ex-model-q small {
  color: var(--muted);
}
.ex-model-en {
  font: 17px/1.85 var(--serif);
  margin: 0 0 8px;
}
.ex-s {
  border-radius: 4px;
  transition: background 0.2s;
}
.ex-s.on {
  background: var(--hl);
  color: var(--hl-ink);
}
.ex-model-ja summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 14px;
  color: var(--brand);
}
.ex-model-ja p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink2);
}

/* ---- 背景知識・重要語 ---- */
.ex-facts {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
  gap: 10px;
}
.ex-facts li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px 12px 40px;
  position: relative;
  line-height: 1.65;
}
.ex-facts li::before {
  content: '💡';
  position: absolute;
  left: 12px;
  top: 11px;
}
.ex-words {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(200px, 100%), 1fr));
  gap: 8px;
}
.ex-words a {
  display: grid;
  gap: 2px;
  text-decoration: none;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  color: var(--ink);
  transition: border-color 0.2s;
}
.ex-words a:hover {
  border-color: #1971c2;
  color: var(--ink);
}
.ex-words b {
  font: 700 16px/1.3 var(--serif);
  color: #1971c2;
}
.ex-words small {
  color: var(--ink2);
}
.ex-sub-h {
  font-size: 17px;
  margin: 22px 0 10px;
}
.ex-phrases {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
  gap: 6px 16px;
}
.ex-phrases li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
}
.ex-phrases b {
  font: 600 16px/1.4 var(--serif);
  display: block;
}
.ex-phrases small {
  color: var(--muted);
}

/* ---- リンク ---- */
.ex-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
  gap: 12px;
}
.ex-link {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px;
  text-decoration: none;
  color: var(--ink);
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}
.ex-link:hover {
  transform: translateY(-2px);
  color: var(--ink);
}
.ex-link .ic {
  font-size: 28px;
  flex: none;
}
.ex-link .ic .emo {
  width: 36px;
  height: 36px;
}
.ex-link b {
  display: block;
  font-family: var(--round);
  color: #1971c2;
}
.ex-link small {
  color: var(--ink2);
  font-size: 13px;
  line-height: 1.55;
}

/* ---- テーマのページ ---- */
.ex-kicker {
  margin: 0 0 4px;
  font-weight: 800;
  font-size: 13px;
  opacity: 0.95;
}
.ex-jump {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 10px 0;
  margin: 18px 0 0;
  scrollbar-width: none;
}
.ex-jump::-webkit-scrollbar {
  display: none;
}
.ex-jump a {
  flex: none;
  text-decoration: none;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 13px;
  font-weight: 800;
  font-size: 14px;
  color: var(--ink2);
}
.ex-jump a:hover {
  border-color: #1971c2;
  color: #1971c2;
}
.ex-topic .sec {
  margin: 40px 0;
  scroll-margin-top: 80px;
}

@media (max-width: 760px) {
  .ex-steps {
    grid-template-columns: 1fr;
  }
  .ex-steps {
    gap: 8px;
  }
  .ex-steps li {
    padding: 9px 12px;
    font-size: 13px;
    line-height: 1.5;
  }
  .ex-steps li > b {
    width: 28px;
    height: 28px;
    font-size: 15px;
  }
  .ex-steps strong {
    font-size: 15px;
  }
  .ex-tabs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-radius: 16px;
  }
  .ex-tabs button {
    padding: 11px 8px;
    font-size: 14px;
    border-radius: 12px;
  }
  .ex-gsel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .ex-gp-info dl {
    grid-template-columns: 1fr;
  }
  .ex-pc {
    grid-template-columns: 1fr;
  }
  .ex-tiles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }
  .ex-tile-in {
    padding: 22px 10px 10px;
  }
  .ex-tile-in b {
    font-size: 14px;
  }
  .ex-tile-meta span:nth-child(3) {
    display: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ex-js .ex-panel.on {
    animation: none;
  }
  .ex-tile,
  .ex-tile-img img,
  .ex-link {
    transition: none;
  }
}