@charset "UTF-8";

/* ===============================================================
   ウミガメのスープ｜水平思考クイズ
   northStar: "Monochrome terminal with amber accents"
   =============================================================== */

:root {
  --bg: #0a0a0a;
  --panel: #101010;
  --panel-2: #161616;
  --border: #2a2a2a;
  --border-bright: #3a3733;

  --text: #d8d2c8;
  --text-dim: #8a8377;
  --text-faint: #5d5850;

  --amber: #e7c59a;
  --amber-bright: #ffd7a0;

  --yes: #7ee787;
  --no: #ff7b72;
  --irrelevant: #6e7681;
  --uncertain: #d9b25f;

  --mono: "JetBrains Mono", "Noto Sans JP", ui-monospace, SFMono-Regular, Menlo, monospace;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* CRTの走査線と周辺減光。装飾なのでクリックは透過させる */
body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
}
body::before {
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.022) 0 1px,
    transparent 1px 3px
  );
}
body::after {
  background: radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 0, 0.55) 100%);
}

.wrap {
  max-width: 940px;
  margin: 0 auto;
  padding: clamp(24px, 5vw, 56px) clamp(16px, 4vw, 32px) 80px;
}

a { color: var(--amber); }
a:hover { color: var(--amber-bright); }

/* ---------- ヘッダー ---------- */
.site-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.site-head h1 {
  margin: 0;
  font-size: clamp(26px, 5vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--amber-bright);
  text-shadow: 0 0 24px rgba(231, 197, 154, 0.25);
}
.site-head h1 .sub {
  display: block;
  margin-top: 6px;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  text-shadow: none;
}
.free {
  align-self: flex-start;
  border: 1px solid var(--border-bright);
  color: var(--amber);
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 16px;
  line-height: 1.5;
}

.lead {
  margin: 0 0 32px;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.9;
}
.lead strong { color: var(--text); font-weight: 500; }

/* ---------- ジャンルタブ ---------- */
/* ジャンルが増えても自動で段が増えるようグリッドで組む（flexだと横に溢れる） */
.tabs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
  margin-bottom: 16px;
}
.tab {
  min-width: 0;
  appearance: none;
  cursor: pointer;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
  color: var(--text-faint);
  font-family: inherit;
  font-size: 16px;
  letter-spacing: 0.1em;
  padding: 12px 16px;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.tab span {
  display: block;
  font-size: 16px;
  letter-spacing: 0;
  color: inherit;
  opacity: 0.75;
}
.tab:hover { color: var(--text-dim); border-color: var(--border-bright); }
.tab.is-active {
  color: var(--amber-bright);
  border-color: var(--amber);
  background: var(--panel-2);
  box-shadow: inset 0 -2px 0 var(--amber);
}

/* ---------- 問題リスト ---------- */
.picker {
  border: 1px solid var(--border);
  border-radius: 0 0 var(--radius) var(--radius);
  background: var(--panel);
  margin-bottom: 28px;
}
.picker-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 16px;
  letter-spacing: 0.14em;
}
.picker-head .ghost { white-space: nowrap; letter-spacing: 0.1em; }

/* 難易度フィルタ */
.level-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-left: auto;
}
.level-chip {
  appearance: none;
  cursor: pointer;
  background: transparent;
  border: 1px solid var(--border-bright);
  border-radius: 4px;
  color: var(--text-faint);
  font-family: inherit;
  font-size: 16px;
  letter-spacing: -0.1em;
  padding: 4px 10px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.level-chip i {
  font-style: normal;
  letter-spacing: 0;
  color: var(--text-faint);
  font-size: 16px;
}
.level-chip:hover { color: var(--text-dim); border-color: var(--text-faint); }
.level-chip.is-active {
  color: var(--amber-bright);
  border-color: var(--amber);
  background: rgba(231, 197, 154, 0.08);
}
.level-chip.is-active i { color: var(--amber); }

.case-empty {
  margin: 0;
  padding: 24px 16px;
  color: var(--text-faint);
  text-align: center;
}
.case-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  background: var(--panel);
  border-radius: 0 0 var(--radius) var(--radius);
  overflow: hidden;
}
.case {
  appearance: none;
  cursor: pointer;
  text-align: left;
  background: var(--panel);
  /* 空きセルが色違いのブロックに見えないよう、区切りは枠線で引く */
  border: none;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  font-family: inherit;
  font-size: 16px;
  padding: 14px 16px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  transition: background 0.15s, color 0.15s;
}
.case:hover { background: var(--panel-2); color: var(--text); }
.case.is-current { background: var(--panel-2); color: var(--amber-bright); }
.case-no { color: var(--text-faint); }
.case.is-current .case-no { color: var(--amber); }
.case-title { flex: 1 1 auto; }
.case-level { color: var(--text-faint); letter-spacing: -0.1em; }
.case-flag { color: var(--yes); }

/* ---------- ターミナル ---------- */
.terminal {
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
  box-shadow: 0 0 60px rgba(231, 197, 154, 0.05);
}
.term-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
  font-size: 16px;
  color: var(--text-faint);
}
.dots { display: flex; gap: 6px; }
.dots i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-bright);
}
.term-title {
  flex: 1 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.term-meta { display: flex; align-items: center; gap: 12px; }
.meta-item b { color: var(--amber); font-weight: 400; }
.ai-toggle {
  appearance: none;
  cursor: pointer;
  background: transparent;
  border: 1px solid var(--border-bright);
  border-radius: 4px;
  color: var(--text-faint);
  font-family: inherit;
  font-size: 16px;
  padding: 1px 8px;
}
.ai-toggle:hover { border-color: var(--amber); color: var(--amber); }
.ai-toggle b { font-weight: 700; }
.ai-toggle.is-on { border-color: var(--yes); color: var(--yes); }
.ai-toggle.is-warn { border-color: var(--uncertain); color: var(--uncertain); }

.term-body {
  min-height: 44vh;
  max-height: 62vh;
  overflow-y: auto;
  overflow-wrap: break-word;
  padding: 20px clamp(14px, 3vw, 22px);
  font-size: 16px;
  line-height: 1.85;
  scrollbar-width: thin;
  scrollbar-color: var(--border-bright) transparent;
}
.term-body::-webkit-scrollbar { width: 10px; }
.term-body::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 99px; }

.line { margin: 0 0 4px; }
.line.sys { color: var(--text-faint); }
.line.gap { height: 12px; }
.line.q { color: var(--text); }
.line.q .mark { color: var(--amber); margin-right: 8px; }
.line.note { color: var(--text-dim); padding-left: 24px; }
.line.hint {
  color: var(--uncertain);
  border-left: 2px solid var(--uncertain);
  padding: 2px 0 2px 14px;
  margin: 8px 0;
}
.line.error { color: var(--no); }
.line.solved {
  color: var(--yes);
  font-weight: 700;
  letter-spacing: 0.24em;
  text-shadow: 0 0 18px rgba(126, 231, 135, 0.5);
  margin: 14px 0 6px;
}

.puzzle-block {
  border: 1px solid var(--border-bright);
  border-left: 3px solid var(--amber);
  background: var(--panel-2);
  padding: 16px 18px;
  margin: 10px 0 18px;
  color: var(--text);
  line-height: 1.9;
}
.puzzle-block .case-label {
  display: block;
  color: var(--text-faint);
  letter-spacing: 0.14em;
  margin-bottom: 8px;
}

.verdict {
  display: inline-block;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding-left: 24px;
}
.verdict.is-yes { color: var(--yes); text-shadow: 0 0 14px rgba(126, 231, 135, 0.45); }
.verdict.is-no { color: var(--no); text-shadow: 0 0 14px rgba(255, 123, 114, 0.35); }
.verdict.is-irrelevant { color: var(--irrelevant); }
.verdict.is-uncertain { color: var(--uncertain); }
.verdict.is-unknown { color: var(--text-faint); }
.verdict .src { font-weight: 400; letter-spacing: 0; color: var(--text-faint); margin-left: 10px; }

.truth-block {
  border: 1px solid var(--amber);
  background: rgba(231, 197, 154, 0.06);
  padding: 16px 18px;
  margin: 14px 0;
  color: var(--text);
  line-height: 1.9;
}
.truth-block .truth-label {
  display: block;
  color: var(--amber);
  letter-spacing: 0.14em;
  margin-bottom: 8px;
}
.result {
  margin: 14px 0;
  padding: 14px 18px;
  border: 1px dashed var(--border-bright);
  color: var(--text-dim);
}
.result b { color: var(--amber-bright); font-weight: 700; }

/* クリア時のシェア */
.share-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 6px 0 14px;
}
.share-label {
  color: var(--text-faint);
  letter-spacing: 0.14em;
  margin-right: 4px;
}
.share-btn {
  appearance: none;
  cursor: pointer;
  display: inline-block;
  background: transparent;
  border: 1px solid var(--border-bright);
  border-radius: 4px;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 16px;
  line-height: 1.4;
  padding: 5px 14px;
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s;
}
.share-btn:hover {
  color: var(--amber-bright);
  border-color: var(--amber);
}

.caret {
  display: inline-block;
  width: 9px;
  height: 1.1em;
  vertical-align: text-bottom;
  background: var(--amber);
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- 入力 ---------- */
.term-input {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-top: 1px solid var(--border);
  background: var(--panel-2);
}
.prompt {
  color: var(--amber);
  font-weight: 700;
  flex: none;
}
.term-input.is-answer .prompt { color: var(--yes); }
#askInput {
  flex: 1 1 auto;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: inherit;
  font-size: 16px;
  caret-color: var(--amber);
  padding: 6px 0;
}
#askInput::placeholder { color: var(--text-faint); }
.send {
  appearance: none;
  cursor: pointer;
  flex: none;
  background: var(--amber);
  color: #16120c;
  border: none;
  border-radius: 4px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  padding: 7px 18px;
  transition: background 0.15s;
}
.send:hover { background: var(--amber-bright); }
.send:disabled { opacity: 0.45; cursor: not-allowed; }

.term-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 14px;
  border-top: 1px solid var(--border);
}
.ghost {
  appearance: none;
  cursor: pointer;
  background: transparent;
  border: 1px solid var(--border-bright);
  border-radius: 4px;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 16px;
  padding: 6px 14px;
  transition: color 0.15s, border-color 0.15s;
}
.ghost:hover { color: var(--amber); border-color: var(--amber); }

/* ---------- AI設定 ---------- */
.settings {
  margin: 28px 0 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 14px 18px;
}
.settings > summary {
  cursor: pointer;
  color: var(--text-dim);
  font-size: 16px;
}
.settings > summary:hover { color: var(--amber); }
.settings-note {
  color: var(--text-dim);
  line-height: 1.9;
  margin: 14px 0;
}
.settings-note.small { color: var(--text-faint); }
.settings-note strong { color: var(--text); font-weight: 500; }
.settings-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 12px 0;
}
/* display:flex がUAの [hidden]{display:none} を上書きしてしまうため明示的に打ち消す */
.settings-row[hidden] { display: none; }
.settings-row label { color: var(--text-dim); min-width: 120px; }
.settings-row select,
.settings-row input {
  flex: 1 1 240px;
  min-width: 0;
  background: var(--bg);
  border: 1px solid var(--border-bright);
  border-radius: 4px;
  color: var(--text);
  font-family: inherit;
  font-size: 16px;
  padding: 8px 10px;
}
.settings-row select:focus,
.settings-row input:focus { outline: 1px solid var(--amber); }

/* ---------- 説明・フッター ---------- */
.about {
  margin-top: 56px;
  color: var(--text-dim);
}
.about h2 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--amber);
  margin: 32px 0 12px;
}
.about ul,
.about ol { padding-left: 1.4em; margin: 0; }
.about li { margin-bottom: 10px; line-height: 1.9; }
.about strong { color: var(--text); font-weight: 500; }

footer {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 12px 24px;
  color: var(--text-faint);
}
.footer-links { display: flex; flex-wrap: wrap; gap: 12px 20px; }

/* ---------- 広告（ミニアプリ規格 300×250） ---------- */
.footer-ad {
  position: fixed;
  right: 0;
  bottom: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 0;
  width: 300px;
  overflow: hidden;
  background: transparent;
  border: none;
  box-shadow: none;
}
.footer-ad.is-closed { display: none; }
.ad-widget__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  position: relative;
  z-index: 1;
}
.ad-widget__label {
  color: #64748b;
  font-size: 12px;
  letter-spacing: 0.04em;
  background: #f1f5f9;
  padding: 2px 8px;
  border-radius: 999px;
}
.ad-widget__close {
  appearance: none;
  border: none;
  background: #f1f5f9;
  color: #64748b;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, color 0.2s;
}
.ad-widget__close:hover { background: #e2e8f0; color: #1e293b; }
.footer-ad ins.adsbygoogle { display: block; width: 300px; height: 250px; }

@media screen and (max-width: 768px) {
  .footer-ad {
    position: static;
    align-self: center;
    margin: 24px auto 0;
    gap: 0;
    padding: 0;
    background: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
    z-index: auto;
  }
  .footer-ad.is-closed { display: flex; } /* PCで閉じてもSPでは表示 */
  .ad-widget__head { display: none; }
  .footer-ad ins.adsbygoogle { width: 300px; height: 250px; }
}

/* ---------- レスポンシブ ---------- */
@media screen and (max-width: 640px) {
  .term-body { min-height: 50vh; max-height: 58vh; }
  .case-list { grid-template-columns: 1fr; }
  /* 見出しとRESETを1段目、難易度フィルタを2段目に回して3段化を防ぐ。
     見出しの字間を詰めないとRESETが乗り切らず3段になる */
  .picker-head { letter-spacing: 0.04em; }
  .picker-genre { display: none; }
  #pickerLabel { order: 1; }
  .picker-head .ghost { order: 2; }
  .level-filter { order: 3; width: 100%; margin-left: 0; }
  /* パス表示を落として、カウンタ類を1行に収める */
  .term-title { display: none; }
  .term-meta { gap: 10px; margin-left: auto; }
  .send { padding: 7px 14px; }
}

/* ---------- モーション配慮 ---------- */
@media (prefers-reduced-motion: reduce) {
  .caret { animation: none; }
  body::before { display: none; }
  * { transition: none !important; }
}