@charset "UTF-8";
/* ============================================================
   AIの夜 ポータル
   スライド（第1夜・第3夜）の世界観に合わせた「夜」のトーン。
   ネイビーパープルのグラデーション × 星 × ピンクのアクセント。
   素材画像ゼロ（星も装飾も CSS のみ）。
   ============================================================ */

:root {
  --navy-900: #1b1733;
  --navy-800: #241e42;
  --navy-700: #2f2857;
  --navy-600: #3b3268;
  --pink: #ff6fb5;
  --pink-strong: #f5399a;
  --pink-soft: rgba(255, 111, 181, 0.14);
  --yellow: #ffd93d;
  --cyan: #7fdcff;
  --cream: #fffbf5;
  --text: #f4f1fb;
  --text-muted: #b9b2d6;
  --text-dark: #1b1733;
  --card: rgba(255, 255, 255, 0.055);
  --card-line: rgba(255, 255, 255, 0.12);
  --radius: 16px;
  --radius-sm: 10px;
  --wrap: 1080px;
  --font: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic",
          "Noto Sans JP", "Meiryo", system-ui, sans-serif;
  --mono: "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--navy-900);
  background-image:
    radial-gradient(1200px 600px at 15% -10%, #453a7d 0%, transparent 60%),
    radial-gradient(900px 500px at 100% 0%, #352c60 0%, transparent 55%),
    linear-gradient(180deg, #241e42 0%, #1b1733 55%, #16132a 100%);
  background-attachment: fixed;
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
}

/* 星（CSS のみ・装飾なので読み上げ対象外） */
.stars {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(1.6px 1.6px at 12% 18%, rgba(255,255,255,.85) 50%, transparent 51%),
    radial-gradient(1.4px 1.4px at 78% 12%, rgba(127,220,255,.8) 50%, transparent 51%),
    radial-gradient(1.8px 1.8px at 62% 32%, rgba(255,217,61,.75) 50%, transparent 51%),
    radial-gradient(1.3px 1.3px at 33% 62%, rgba(255,255,255,.6) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 88% 58%, rgba(255,111,181,.7) 50%, transparent 51%),
    radial-gradient(1.2px 1.2px at 22% 86%, rgba(255,255,255,.55) 50%, transparent 51%),
    radial-gradient(1.6px 1.6px at 70% 82%, rgba(127,220,255,.6) 50%, transparent 51%),
    radial-gradient(1.2px 1.2px at 46% 8%, rgba(255,255,255,.5) 50%, transparent 51%);
}

.wrap {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--pink); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- ヘッダー ---------- */
.site-head {
  position: relative;
  z-index: 2;
  border-bottom: 1px solid var(--card-line);
  background: rgba(27, 23, 51, 0.72);
  backdrop-filter: blur(10px);
}
.head-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand { color: var(--text); display: block; }
.brand:hover { text-decoration: none; }
.brand-main {
  display: block;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.2;
}
.brand-main .dot { color: var(--pink); }
.brand-sub {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: .08em;
}
.site-nav { display: flex; gap: 4px; flex-wrap: wrap; }
.site-nav a {
  color: var(--text-muted);
  font-size: 14px;
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid transparent;
}
.site-nav a:hover { color: var(--text); background: rgba(255,255,255,.06); text-decoration: none; }
.site-nav a.cur {
  color: #fff;
  background: var(--pink-soft);
  border-color: rgba(255,111,181,.45);
}

/* ---------- 見出し ---------- */
.page-title {
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.25;
  margin: 34px 0 10px;
  letter-spacing: .01em;
}
.page-title .accent { color: var(--pink); }
.lead { color: var(--text-muted); margin: 0 0 26px; }
.section-title {
  font-size: 20px;
  margin: 42px 0 16px;
  padding-left: 13px;
  border-left: 4px solid var(--pink);
  line-height: 1.4;
}

/* ---------- ヒーロー ---------- */
.hero { padding: 54px 0 16px; }
.hero .eyebrow {
  color: var(--pink);
  font-size: 13px;
  letter-spacing: .22em;
  margin: 0 0 14px;
}
.hero h1 {
  font-size: clamp(30px, 6vw, 54px);
  line-height: 1.2;
  margin: 0 0 18px;
  letter-spacing: .01em;
}
.hero p { color: var(--text-muted); max-width: 46em; margin: 0 0 8px; }
.marker {
  background: linear-gradient(transparent 62%, rgba(255,111,181,.42) 62%);
  padding: 0 .12em;
}

/* ---------- カード ---------- */
.grid { display: grid; gap: 16px; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(268px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

.card {
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--radius);
  padding: 22px;
}
.card h3 { margin: 0 0 8px; font-size: 17px; line-height: 1.5; }
.card p { margin: 0; color: var(--text-muted); font-size: 14px; }

a.card { color: var(--text); display: block; transition: border-color .15s, background .15s, transform .15s; }
a.card:hover {
  text-decoration: none;
  border-color: rgba(255,111,181,.5);
  background: rgba(255,255,255,.085);
  transform: translateY(-2px);
}

.panel {
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--radius);
  padding: 24px;
  margin: 20px 0;
}

/* ---------- バッジ ---------- */
.badge {
  display: inline-block;
  font-size: 11.5px;
  line-height: 1.6;
  padding: 2px 10px;
  border-radius: 999px;
  border: 1px solid var(--card-line);
  color: var(--text-muted);
  white-space: nowrap;
}
.badge.c-a { color: #ffc6e2; border-color: rgba(255,111,181,.5); background: rgba(255,111,181,.13); }
.badge.c-b { color: #bfe6ff; border-color: rgba(127,220,255,.45); background: rgba(127,220,255,.12); }
.badge.c-c { color: #ffe9a3; border-color: rgba(255,217,61,.45); background: rgba(255,217,61,.11); }
.badge.c-d { color: #c9f7d6; border-color: rgba(120,230,160,.42); background: rgba(120,230,160,.11); }
.badge.c-e { color: #d9ccff; border-color: rgba(180,150,255,.45); background: rgba(180,150,255,.13); }
.badge.night { color: #fff; border-color: rgba(255,255,255,.28); background: rgba(255,255,255,.09); }
.badge.warn { color: #ffd0d0; border-color: rgba(255,120,120,.5); background: rgba(255,120,120,.12); }

.badges { display: flex; gap: 7px; flex-wrap: wrap; align-items: center; }

/* ---------- Q&A：カード一覧 ---------- */
.qa-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
  margin: 8px 0 0;
  align-items: start;
}

.qcard {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--radius);
  padding: 20px;
  color: var(--text);
  height: 100%;
  transition: border-color .15s, background .15s, transform .15s;
}
.qcard:hover {
  text-decoration: none;
  border-color: rgba(255,111,181,.55);
  background: rgba(255,255,255,.085);
  transform: translateY(-2px);
}
.qcard.no-a { border-style: dashed; }
.qcard-badges { margin: 0; }

.qcard-q {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.65;
  font-weight: 700;
}
.qcard-q .mark {
  flex: none;
  width: 25px; height: 25px;
  border-radius: 50%;
  background: var(--pink);
  color: #fff;
  display: grid; place-items: center;
  font-size: 12.5px; font-weight: 700;
  margin-top: 1px;
}
/* 質問文は3行で切る（カードの高さを揃えるため） */
.qcard-text {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.qcard-a {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-muted);
}
.qcard-a .a-mark {
  flex: none;
  width: 25px; height: 25px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.28);
  color: var(--text-muted);
  display: grid; place-items: center;
  font-size: 12.5px;
  margin-top: 1px;
}
.qcard-a.muted { font-style: italic; opacity: .8; }

.qcard-foot {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin: auto 0 0;
  padding-top: 4px;
  font-size: 12px;
  color: var(--text-muted);
}
.qcard-foot .more { color: var(--pink); white-space: nowrap; }

/* ---------- Q&A：詳細 ---------- */
.crumb { font-size: 13px; color: var(--text-muted); margin: 28px 0 14px; }
.crumb a { color: var(--text-muted); }
.crumb a:hover { color: var(--pink); }

.qdetail {
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--radius);
  padding: 28px;
}
.qdetail-q {
  display: flex;
  gap: 13px;
  align-items: flex-start;
  font-size: clamp(19px, 2.6vw, 25px);
  line-height: 1.55;
  margin: 0;
}
.qdetail-q .mark {
  flex: none;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--pink);
  color: #fff;
  display: grid; place-items: center;
  font-size: 16px; font-weight: 700;
  margin-top: 3px;
}
.qdetail-note { color: var(--text-muted); font-size: 12.5px; margin: 14px 0 0; }
.qa-body { padding: 20px; display: grid; gap: 16px; }
.qa-original {
  background: var(--pink-soft);
  border-left: 3px solid var(--pink);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 14px 16px;
  font-size: 14.5px;
}
.qa-original .who { color: var(--pink); font-size: 12px; display: block; margin-bottom: 5px; }
.qa-answer {
  background: var(--cream);
  color: var(--text-dark);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  font-size: 15px;
  line-height: 1.85;
}
.qa-answer .a-head {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; color: var(--pink-strong);
  margin-bottom: 8px; font-size: 13px; letter-spacing: .06em;
}
.qa-answer strong { color: var(--pink-strong); }
.qa-answer p { margin: 0 0 .9em; }
.qa-answer p:last-child { margin-bottom: 0; }
/* クリーム地の中の表は罫線を濃くする（既定の .tbl は暗い背景向け） */
.qa-answer .tbl { margin: 6px 0 12px; }
.qa-answer .tbl td { border-bottom: 1px solid rgba(27,23,51,.16); padding: 9px 12px 9px 0; }
.qa-answer .tbl tr:first-child td { font-weight: 700; border-bottom-color: rgba(27,23,51,.32); }
.qa-answer .tbl tr:hover td { background: rgba(27,23,51,.04); }
.qa-none {
  border: 1px dashed rgba(255,255,255,.25);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--text-muted);
  font-size: 14px;
}
.qa-meta { color: var(--text-muted); font-size: 12px; }

/* ---------- プロンプト ---------- */
.prompt-body {
  background: rgba(0,0,0,.34);
  border: 1px solid var(--card-line);
  border-radius: var(--radius-sm);
  padding: 15px 16px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.85;
  white-space: pre-wrap;
  word-break: break-word;
  color: #eae6fb;
  overflow-x: auto;
}
.copy-btn {
  border: 1px solid rgba(255,111,181,.5);
  background: var(--pink-soft);
  color: #ffd3e8;
  border-radius: 999px;
  padding: 5px 15px;
  font-size: 12.5px;
  cursor: pointer;
  font-family: inherit;
}
.copy-btn:hover { background: rgba(255,111,181,.24); }

/* ---------- ニュース ---------- */
.news-item {
  display: grid;
  grid-template-columns: 108px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--card-line);
}
.news-item:last-child { border-bottom: 0; }
.news-date { color: var(--text-muted); font-size: 13px; }
.news-item h3 { margin: 0 0 6px; font-size: 16.5px; line-height: 1.6; }
.news-item p { margin: 0; color: var(--text-muted); font-size: 14px; }

/* ---------- 絞り込み ---------- */
.filters {
  display: flex; gap: 8px; flex-wrap: wrap; align-items: center;
  margin: 0 0 22px;
}
.filters .flabel { color: var(--text-muted); font-size: 12px; margin-right: 2px; }
.chip {
  font-size: 13px;
  padding: 5px 13px;
  border-radius: 999px;
  border: 1px solid var(--card-line);
  color: var(--text-muted);
}
.chip:hover { color: #fff; background: rgba(255,255,255,.07); text-decoration: none; }
.chip.on {
  color: #fff; background: var(--pink-soft);
  border-color: rgba(255,111,181,.55);
}
.searchbox { display: flex; gap: 8px; margin: 0 0 20px; flex-wrap: wrap; }
.searchbox input[type="search"] {
  flex: 1 1 240px;
  min-width: 0;
  background: rgba(0,0,0,.28);
  border: 1px solid var(--card-line);
  border-radius: 999px;
  padding: 10px 18px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}
.searchbox input[type="search"]:focus { outline: 2px solid rgba(255,111,181,.5); outline-offset: 1px; }

/* さがす欄（初見の人向けに、選択肢を並べず「どれ？」と聞く形にしている） */
.finder {
  display: flex;
  gap: 14px 18px;
  flex-wrap: wrap;
  align-items: flex-end;
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin: 0 0 24px;
}
.finder-item { display: grid; gap: 6px; }
.finder-kw { flex: 1 1 220px; min-width: 0; }
.finder-label { font-size: 12.5px; color: var(--text-muted); }
.finder select,
.finder input[type="search"] {
  background: rgba(0,0,0,.3);
  border: 1px solid var(--card-line);
  border-radius: 999px;
  padding: 9px 16px;
  color: var(--text);
  font-size: 14.5px;
  font-family: inherit;
  width: 100%;
}
.finder select { padding-right: 34px; }
.finder select:focus, .finder input[type="search"]:focus {
  outline: 2px solid rgba(255,111,181,.5); outline-offset: 1px;
}
.finder-go { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* ---------- AI基礎知識 ---------- */
.basic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
  margin: 8px 0 0;
  align-items: start;
}
.bcard {
  display: flex;
  gap: 16px;
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--radius);
  padding: 20px;
  color: var(--text);
  height: 100%;
  transition: border-color .15s, background .15s, transform .15s;
}
.bcard:hover {
  text-decoration: none;
  border-color: rgba(255,111,181,.55);
  background: rgba(255,255,255,.085);
  transform: translateY(-2px);
}
.bcard-icon { flex: none; font-size: 30px; line-height: 1.2; }
.bcard-main { display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.bcard-title { font-size: 16.5px; font-weight: 700; line-height: 1.55; }
.bcard-lead { font-size: 13.5px; color: var(--text-muted); line-height: 1.75; }
.bcard-more { font-size: 13px; color: var(--pink); margin-top: auto; padding-top: 4px; }

.basic-title {
  display: flex; gap: 14px; align-items: flex-start;
  margin: 0; font-size: 25px; line-height: 1.5;
}
.basic-title-icon { flex: none; font-size: 30px; }
.basic-lead { color: var(--text-muted); margin: 12px 0 0; font-size: 15px; }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 26px 0 0; }
.pager-item {
  display: grid; gap: 4px;
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  color: var(--text);
}
.pager-item:hover { text-decoration: none; border-color: rgba(255,111,181,.5); background: rgba(255,255,255,.08); }
.pager-item.next { text-align: right; }
.pager-dir { font-size: 12px; color: var(--pink); }
.pager-title { font-size: 14px; }

/* ---------- 統計 ---------- */
.stats { display: flex; gap: 10px; flex-wrap: wrap; margin: 0 0 8px; }
.stat {
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  min-width: 104px;
}
.stat .num { font-size: 26px; font-weight: 700; line-height: 1.2; }
.stat .num .u { font-size: 13px; font-weight: 400; color: var(--text-muted); margin-left: 3px; }
.stat .lbl { font-size: 12px; color: var(--text-muted); }

/* ---------- フッター ---------- */
.site-foot {
  position: relative;
  z-index: 1;
  margin-top: 64px;
  padding: 34px 0 46px;
  border-top: 1px solid var(--card-line);
  background: rgba(0,0,0,.2);
}
.foot-lead { margin: 0 0 8px; letter-spacing: .06em; }
.foot-note { margin: 0; color: var(--text-muted); font-size: 12.5px; }

/* ---------- 管理画面 ---------- */
.admin-bar {
  background: rgba(0,0,0,.32);
  border: 1px solid var(--card-line);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  margin: 22px 0;
  display: flex; gap: 14px; flex-wrap: wrap; align-items: center;
  font-size: 14px;
}
.admin-bar .sp { flex: 1; }
.form-row { display: grid; gap: 6px; margin: 0 0 16px; }
.form-row label { font-size: 13px; color: var(--text-muted); }
.form-row input[type="text"],
.form-row input[type="password"],
.form-row input[type="date"],
.form-row select,
.form-row textarea {
  width: 100%;
  background: rgba(0,0,0,.3);
  border: 1px solid var(--card-line);
  border-radius: var(--radius-sm);
  padding: 10px 13px;
  color: var(--text);
  font-size: 14.5px;
  font-family: inherit;
  line-height: 1.7;
}
.form-row textarea { min-height: 130px; resize: vertical; }
.form-row input:focus, .form-row textarea:focus, .form-row select:focus {
  outline: 2px solid rgba(255,111,181,.5); outline-offset: 1px;
}
.form-2col { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0 16px; }
.btn {
  display: inline-block;
  background: var(--pink);
  color: #fff;
  border: 0;
  border-radius: 999px;
  padding: 10px 26px;
  font-size: 14.5px;
  font-family: inherit;
  font-weight: 700;
  cursor: pointer;
}
.btn:hover { background: var(--pink-strong); text-decoration: none; }
.btn.ghost {
  background: transparent;
  border: 1px solid var(--card-line);
  color: var(--text-muted);
  font-weight: 400;
}
.btn.ghost:hover { color: #fff; background: rgba(255,255,255,.07); }
.btn.danger { background: transparent; border: 1px solid rgba(255,120,120,.55); color: #ffb3b3; font-weight: 400; }
.btn.danger:hover { background: rgba(255,120,120,.15); }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-top: 8px; }

.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th, .tbl td { text-align: left; padding: 11px 10px; border-bottom: 1px solid var(--card-line); vertical-align: top; }
.tbl th { color: var(--text-muted); font-size: 12px; font-weight: 400; white-space: nowrap; }
.tbl tr:hover td { background: rgba(255,255,255,.035); }
.tbl-scroll { overflow-x: auto; }

.flash {
  background: rgba(120,230,160,.14);
  border: 1px solid rgba(120,230,160,.45);
  color: #d8ffe6;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin: 18px 0;
  font-size: 14px;
}
.err {
  background: rgba(255,120,120,.14);
  border: 1px solid rgba(255,120,120,.5);
  color: #ffd6d6;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin: 18px 0;
  font-size: 14px;
}
.empty { color: var(--text-muted); padding: 28px 0; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 640px) {
  body { font-size: 15px; }
  .head-inner { padding-bottom: 10px; }
  .site-nav a { padding: 6px 11px; font-size: 13px; }
  .news-item { grid-template-columns: 1fr; gap: 6px; }
  .card, .panel { padding: 18px; }
  .qa-body { padding: 16px; }
  .finder { padding: 16px; gap: 12px; }
  .finder-item { width: 100%; }
  .pager { grid-template-columns: 1fr; }
  .basic-title { font-size: 21px; gap: 10px; }
}

@media print {
  .stars, .site-nav, .site-foot, .copy-btn { display: none; }
  body { background: #fff; color: #000; }
}