/* ===========================================================
   生成AIリテラシー診断 — UI
   落ち着いた和文エディトリアル × 控えめな先進感
   =========================================================== */

:root {
  color-scheme: dark;

  --ink:        #0a0d15;
  --ink-2:      #0e1220;
  --surface:    #121727;
  --surface-2:  #0d111d;

  --line:       #1e2538;
  --line-hi:    #2a3250;

  --fg:         #e8eaf1;
  --fg-dim:     #b5bacd;
  --muted:      #6b7392;

  --accent:     #9ec5e6;   /* 曇り空の青 */
  --accent-dim: #4a6b87;
  --ko:         #d6c38e;   /* 古色 */

  --rank-s: #e8cf8a;
  --rank-a: #a7d9ae;
  --rank-b: #9ec5e6;
  --rank-c: #e8c37b;
  --rank-d: #d9a3a3;

  --ff-min:  "Noto Serif JP", "Hiragino Mincho ProN", "YuMincho", "Yu Mincho", serif;
  --ff-go:   "Noto Sans JP", -apple-system, "Hiragino Sans", sans-serif;
  --ff-num:  "Noto Serif JP", Georgia, serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--ink);
  color: var(--fg);
  font-family: var(--ff-go);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body { position: relative; min-height: 100vh; overflow-x: hidden; }

/* ---------- 背景 ---------- */

.bg-grid {
  position: fixed; inset: 0; z-index: -2;
  background-color: var(--ink);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.12;
  mask-image: radial-gradient(ellipse at 50% 0%, black 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, black 0%, transparent 75%);
}
.bg-glow {
  position: fixed; inset: -10% -10% auto -10%; height: 50vh; z-index: -1;
  background: radial-gradient(45% 50% at 50% 15%, rgba(158, 197, 230, 0.08), transparent 75%);
  pointer-events: none;
}

/* ---------- ヘッダー ---------- */

header {
  position: relative;
  padding: 72px 20px 32px;
  text-align: center;
  border-bottom: 1px solid var(--line);
}
header::after {
  content: "";
  position: absolute; left: 50%; bottom: -1px; transform: translateX(-50%);
  width: 72px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--fg-dim);
  font-size: 12px;
  letter-spacing: 0.5em;
  padding-left: 0.5em;
}

h1 {
  font-family: var(--ff-min);
  font-weight: 500;
  font-size: clamp(28px, 4.5vw, 44px);
  line-height: 1.4;
  letter-spacing: 0.08em;
  margin: 0 0 18px;
}
h1 em {
  font-style: normal;
  font-weight: 600;
  background: linear-gradient(180deg, var(--accent) 30%, var(--ko) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding: 0 0.1em;
}

header .sub {
  margin: 0 auto 26px;
  color: var(--fg-dim); font-size: 13px; line-height: 1.9;
  white-space: nowrap;
}
@media (max-width: 720px) {
  header .sub { white-space: normal; max-width: 520px; font-size: 12px; }
}

nav {
  display: inline-flex; gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(10, 14, 26, 0.6);
}
.navbtn {
  background: transparent;
  color: var(--muted);
  border: none;
  padding: 8px 22px;
  cursor: pointer;
  font-family: var(--ff-min);
  font-size: 13px;
  letter-spacing: 0.2em;
  white-space: nowrap;
  transition: color .2s, background .2s;
}
.navbtn:hover { color: var(--fg-dim); }
.navbtn.active {
  color: var(--fg);
  background: rgba(158, 197, 230, 0.08);
}

/* ---------- メイン / カード ---------- */

main { max-width: 760px; margin: 0 auto; padding: 44px 20px 80px; }

.view.hidden { display: none; }
.hidden { display: none !important; }

.card {
  position: relative;
  background: linear-gradient(180deg, rgba(18, 23, 39, 0.6), rgba(13, 17, 29, 0.9));
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 44px 44px 40px;
  box-shadow: 0 24px 80px -32px rgba(0, 0, 0, 0.7);
}
.card::before {
  content: ""; position: absolute; inset: 6px;
  border: 1px solid rgba(158, 197, 230, 0.06);
  pointer-events: none;
}

.card-head {
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.card h2 {
  font-family: var(--ff-min);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: 0.12em;
  margin: 0;
}

/* ---------- フォーム / ボタン ---------- */

label { display: block; margin-bottom: 14px; color: var(--fg-dim); font-size: 13px; }
.field-label {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.14em;
}
.field-help {
  margin: -2px 0 18px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
  letter-spacing: 0.06em;
}

input[type="text"],
input[type="email"],
textarea {
  display: block; width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line-hi);
  border-radius: 2px;
  background: var(--surface-2);
  color: var(--fg);
  font-size: 16px;
  font-family: var(--ff-min);
  letter-spacing: 0.05em;
  transition: border-color .2s, box-shadow .2s;
}
textarea {
  min-height: 144px;
  resize: vertical;
  line-height: 1.8;
}
input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(158, 197, 230, 0.1);
}
input:-webkit-autofill {
  -webkit-text-fill-color: var(--fg);
  -webkit-box-shadow: 0 0 0 1000px var(--surface-2) inset;
  caret-color: var(--fg);
}
input[type="email"]:-webkit-autofill {
  -webkit-text-fill-color: var(--fg);
  -webkit-box-shadow: 0 0 0 1000px var(--surface-2) inset;
  caret-color: var(--fg);
}
::selection { background: rgba(158, 197, 230, 0.3); color: #fff; }

button {
  background: transparent;
  color: var(--fg-dim);
  border: 1px solid var(--line-hi);
  padding: 12px 24px;
  border-radius: 2px;
  cursor: pointer;
  font-family: var(--ff-min);
  font-size: 14px;
  letter-spacing: 0.15em;
  transition: all .2s ease;
}
button:hover:not(:disabled) {
  color: var(--fg);
  border-color: var(--accent-dim);
  background: rgba(158, 197, 230, 0.04);
}
button:disabled { opacity: 0.35; cursor: not-allowed; }

button.primary {
  color: var(--ink);
  background: linear-gradient(135deg, var(--accent) 0%, #d8e9f5 100%);
  border-color: transparent;
  font-weight: 600;
}
button.primary:hover:not(:disabled) {
  filter: brightness(1.05);
  box-shadow: 0 0 24px -6px rgba(158, 197, 230, 0.5);
}

.note { color: var(--muted); font-size: 12px; margin-top: 18px; }

/* ---------- 進捗 / 設問 ---------- */

.progress {
  display: flex; align-items: center; gap: 16px;
  margin-bottom: 28px;
  color: var(--muted);
}
#progress-label {
  font-family: var(--ff-min);
  font-size: 13px;
  color: var(--fg-dim);
  letter-spacing: 0.12em;
  white-space: nowrap;
}
.bar { flex: 1; height: 1px; background: var(--line); position: relative; overflow: hidden; }
#bar-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--ko));
  transition: width .3s ease;
}

.quiz-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: -10px 0 20px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}

#q-text {
  font-family: var(--ff-min);
  font-weight: 500;
  font-size: 20px;
  line-height: 1.75;
  letter-spacing: 0.04em;
  margin: 10px 0 28px;
}

.choices { display: grid; gap: 10px; margin-bottom: 28px; }
.choice {
  position: relative;
  text-align: left;
  padding: 16px 20px 16px 56px;
  border: 1px solid var(--line-hi);
  border-radius: 2px;
  background: var(--surface-2);
  color: var(--fg);
  font-family: var(--ff-go);
  font-size: 14px;
  line-height: 1.8;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.choice::before {
  content: attr(data-key);
  position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  width: 28px; height: 28px; border-radius: 50%;
  border: 1px solid var(--line-hi);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--ff-min);
  font-size: 13px;
  color: var(--muted);
  transition: all .15s;
}
.choice:hover {
  border-color: var(--accent-dim);
  background: rgba(158, 197, 230, 0.03);
}
.choice:hover::before { color: var(--accent); border-color: var(--accent-dim); }
.choice.selected {
  border-color: var(--accent);
  background: rgba(158, 197, 230, 0.07);
}
.choice.selected::before {
  color: var(--ink);
  background: var(--accent);
  border-color: var(--accent);
}

.question-palette {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 6px;
  padding: 12px;
  border: 1px solid var(--line);
  background: rgba(13, 17, 29, 0.5);
}
.palette-dot {
  display: grid;
  place-items: center;
  min-width: 0;
  aspect-ratio: 1;
  padding: 0;
  border-radius: 2px;
  font-family: var(--ff-num);
  font-size: 12px;
  letter-spacing: 0;
}
.palette-dot[data-state="answered"] {
  color: var(--ink);
  background: rgba(158, 197, 230, 0.9);
  border-color: transparent;
}
.palette-dot.current {
  outline: 2px solid var(--ko);
  outline-offset: 2px;
}

.quiz-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 18px; }

.feedback-note,
.result-note {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.feedback-note { margin: 10px 0 0; }
.result-note { margin: 0 0 10px; }

/* ---------- お問い合わせ ---------- */

.support-stack {
  display: grid;
  gap: 34px;
}
.support-form {
  padding-top: 4px;
}
.support-form + .support-form {
  border-top: 1px solid var(--line);
  padding-top: 32px;
}
.support-form h3 {
  font-family: var(--ff-min);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: 0.1em;
  margin: 0 0 20px;
}
.turnstile-box {
  min-height: 65px;
  margin: 16px 0 6px;
}
.form-status {
  min-height: 1.7em;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.form-status[data-state="success"] { color: var(--rank-a); }
.form-status[data-state="error"] { color: var(--rank-d); }
.form-status[data-state="loading"],
.form-status[data-state="note"] { color: var(--fg-dim); }

/* ---------- 結果 ---------- */

.score-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin: 10px 0 24px;
}
.score-grid > div {
  background: var(--surface-2);
  padding: 22px 24px;
  min-height: 128px;
  display: flex; flex-direction: column; justify-content: space-between;
}
.metric { display: flex; align-items: baseline; gap: 8px; }
.big {
  font-family: var(--ff-num);
  font-weight: 500;
  font-size: 44px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--fg);
}
.metric .unit { font-size: 12px; color: var(--muted); letter-spacing: 0.1em; }

.rank-cell {
  background:
    radial-gradient(110% 120% at 100% 0%, rgba(214, 195, 142, 0.12), transparent 55%),
    var(--surface-2) !important;
}
.rank {
  font-family: var(--ff-min);
  font-weight: 700;
  font-size: 72px;
  line-height: 1;
  letter-spacing: 0.02em;
  margin-top: 8px;
  text-shadow: 0 0 24px currentColor;
}
.rank[data-rank="S"] { color: var(--rank-s); }
.rank[data-rank="A"] { color: var(--rank-a); }
.rank[data-rank="B"] { color: var(--rank-b); }
.rank[data-rank="C"] { color: var(--rank-c); }
.rank[data-rank="D"] { color: var(--rank-d); }

.pos { color: var(--muted); font-size: 13px; letter-spacing: 0.1em; margin: 0 0 20px; }

details {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 16px 22px;
  margin-bottom: 20px;
}
details summary {
  cursor: pointer;
  color: var(--fg-dim);
  font-family: var(--ff-min);
  font-size: 13px;
  letter-spacing: 0.14em;
  list-style: none;
}
details summary::-webkit-details-marker { display: none; }
details summary::before {
  content: "▸ ";
  color: var(--accent);
  margin-right: 6px;
  transition: transform .2s;
  display: inline-block;
}
details[open] summary::before { transform: rotate(90deg); }
details[open] summary { margin-bottom: 14px; color: var(--accent); }
#r-detail { padding-left: 20px; margin: 0; color: var(--fg-dim); }
#r-detail li { margin: 14px 0; line-height: 1.85; font-size: 14px; }
#r-detail strong {
  font-family: var(--ff-min); font-size: 13px;
  color: var(--fg); margin-right: 8px; letter-spacing: 0.06em;
}
#r-detail small { color: var(--muted); font-size: 12px; display: inline-block; margin-top: 4px; }
.ok-tag { color: #a7d9ae; margin-right: 6px; }
.ng-tag { color: #d9a3a3; margin-right: 6px; }

/* ---------- ランキング表 ---------- */

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
}
table { width: 100%; min-width: 620px; border-collapse: collapse; font-size: 14px; }
th, td { padding: 14px 10px; border-bottom: 1px solid var(--line); text-align: left; }
th {
  color: var(--muted);
  font-family: var(--ff-min);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.14em;
  border-bottom: 1px solid var(--line-hi);
}
tbody tr { transition: background .15s; }
tbody tr:hover { background: rgba(158, 197, 230, 0.03); }
td { color: var(--fg-dim); font-family: var(--ff-go); }
td:nth-child(1) { font-family: var(--ff-min); color: var(--accent); letter-spacing: 0.05em; }
td:nth-child(2) { color: var(--fg); }
td:nth-child(3), td:nth-child(5) { font-family: var(--ff-num); color: var(--fg); }
td.rank {
  font-size: 22px;
  font-family: var(--ff-min);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-shadow: 0 0 12px currentColor;
}

/* ---------- フッター ---------- */

.sig {
  text-align: center;
  padding: 56px 20px 0;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.2em;
  opacity: 0.6;
}

/* ---------- モバイル ---------- */

@media (max-width: 640px) {
  header { padding-top: 48px; }
  .card { padding: 24px 18px; }
  .card::before { inset: 4px; }
  .card-head { margin-bottom: 20px; padding-bottom: 16px; }
  .card h2 { font-size: 19px; letter-spacing: 0.08em; }
  h1 { font-size: 26px; letter-spacing: 0.05em; }

  #q-text { font-size: 15px; line-height: 1.65; margin: 6px 0 20px; letter-spacing: 0.02em; }

  /* 選択肢: 短いものは 1 行に収まるサイズへ。長文は従来通り折返し。 */
  .choices { gap: 8px; margin-bottom: 22px; }
  .choice {
    font-size: 13px;
    line-height: 1.55;
    padding: 11px 14px 11px 42px;
    letter-spacing: 0.01em;
  }
  .choice::before {
    left: 10px;
    width: 22px; height: 22px;
    font-size: 11px;
  }

  .progress { gap: 12px; margin-bottom: 22px; }
  #progress-label { font-size: 12px; }

  .rank { font-size: 56px; }
  .big { font-size: 32px; }
  .score-grid { grid-template-columns: 1fr; }
  .score-grid > div { min-height: 96px; padding: 18px 20px; }

  .quiz-actions { flex-direction: column; }
  .quiz-actions button { width: 100%; padding: 13px 18px; font-size: 13px; }

  nav {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    width: min(100%, 346px);
  }
  .navbtn {
    padding: 9px 6px;
    font-size: 12px;
    letter-spacing: 0.12em;
  }
  .quiz-meta {
    flex-direction: column;
    gap: 2px;
    margin-bottom: 14px;
  }
  .question-palette {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 7px;
    padding: 10px;
  }
  .palette-dot {
    min-height: 32px;
  }
  .table-wrap {
    overflow: visible;
    border: none;
  }
  table,
  thead,
  tbody,
  tr,
  th,
  td {
    display: block;
    width: 100%;
    min-width: 0;
  }
  thead { display: none; }
  tbody { display: grid; gap: 10px; }
  tbody tr {
    padding: 14px 16px;
    border: 1px solid var(--line);
    background: var(--surface-2);
  }
  tbody tr:hover { background: var(--surface-2); }
  td {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 7px 0;
    border: none;
    text-align: right;
  }
  td::before {
    content: attr(data-label);
    color: var(--muted);
    font-family: var(--ff-min);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-align: left;
  }
  td.rank {
    align-items: center;
    font-size: 28px;
  }
}