/* =========================================================
   Ushi-chan UI – Dark / Mobile-first / 2025-11-12
   ======================================================= */
:root {
  /* colors */
  --bg0: #242829;
  /* page background */
  --bg1: #0f131a;
  /* surface / cards */
  --bg2: #141a22;
  /* elevated */
  --ink: #e9edf6;
  /* text */
  --muted: #9aa3b3;
  /* secondary text */
  --border: #2a3547;
  /* borders */
  --accent: #7a92ff;
  /* brand (控えめ) */
  --accent-2: #7de3ff;
  /* sub accent */
  --danger: #ff6b81;
  --ring: #8aa4ff80;

  /* rhythm */
  --radius: .9rem;
  --radius-sm: .55rem;
  --space: 1rem;

  /* type scale */
  --fs-0: clamp(14px, 3.3vw, 16px);
  --fs-1: clamp(18px, 3.8vw, 21px);
  --fs-2: clamp(22px, 4.6vw, 26px);
  --fs-3: clamp(28px, 6vw, 34px);
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font: var(--fs-0)/1.85 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at -10% -20%, #0d1320 0%, transparent 60%),
    radial-gradient(1000px 500px at 110% -30%, #0b1422 0%, transparent 65%),
    var(--bg0);
  color-scheme: dark;
}

/* ---------- layout ---------- */
.container {
  width: 100%;
  max-width: 52rem;
  margin-inline: auto;
  padding: calc(var(--space) * 1.2);
}

@media (min-width:960px) {
  .container {
    padding: calc(var(--space) * 1.2);
  }
}

/* ---------- headings & text ---------- */
h1 {
  font-size: var(--fs-3);
  line-height: 1.2;
  margin: 0 0 .7em;
}

h2 {
  font-size: var(--fs-2);
  line-height: 1.25;
  margin: 1.2em 0 .5em;
}

h3 {
  font-size: var(--fs-1);
  line-height: 1.3;
  margin: 1.1em 0 .45em;
}

.muted {
  color: var(--muted);
}

/* accent underline */
h1,
h2 {
  position: relative;
  display: block;
  padding-bottom: .25em;
}

h1::after,
h2::after {
  content: "";
  position: absolute;
  left: 0;
  right: 70%;
  height: 3px;
  bottom: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 2px;
}

/* ---------- links ---------- */
a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: .09em;
  text-underline-offset: .22em;
}

a:hover {
  filter: brightness(1.1);
}

/* ---------- cards ---------- */
.card {
  background: linear-gradient(180deg, var(--bg1), var(--bg2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: calc(var(--space) * .9);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .35);
}

.card+.card {
  margin-top: calc(var(--space) * .75);
}

.meta {
  color: var(--muted);
  font-size: .95em;
  display: flex;
  gap: .7rem;
  flex-wrap: wrap;
}

.meta .sep {
  opacity: .5;
}

.stat {
  display: inline-flex;
  gap: .4rem;
  align-items: baseline;
}

.stat .label {
  color: var(--muted);
  font-size: .92em;
}

.stat .value {
  font-variant-numeric: tabular-nums;
}

/* ---------- helpers ---------- */
.stack>*+* {
  margin-top: calc(var(--space) * .75);
}

.cluster {
  display: flex;
  gap: .5rem;
  align-items: center;
  flex-wrap: wrap;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.1rem 0;
}

/* ---------- forms ---------- */
input[type="text"],
textarea,
select {
  width: 100%;
  max-width: 100%;
  padding: .72em .9em;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, #0f141c, #0c1118);
  color: var(--ink);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .03) inset;
}

/* ---- select をダークモード化 ---- */
select {
  background: linear-gradient(180deg, #0f141c, #0c1118);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .8em .9em;
  appearance: none;
}

/* プルダウンの選択肢の背景色 */
select option {
  background: #0f141c;
  color: var(--ink);
}

textarea {
  resize: vertical;
  min-height: 9rem;
}

:where(input[type="text"], textarea, select):focus-visible {
  outline: 0;
  border-color: transparent;
  box-shadow: 0 0 0 3px var(--ring);
}

select {
  font-size: 1em;
  line-height: 1.4;
  letter-spacing: .01em;
}

/* 報告セレクトの可読性UP（白背景が出る環境向けフォールバック） */
.select-strong {
  background: #0f141b !important;
  color: var(--ink) !important;
  border-color: #334156 !important;
}

/* ---------- buttons ---------- */
/* デフォルトは控えめ（縁取り）。強調は .btn-primary を個別に付ける */
button,
.btn,
input[type="submit"] {
  appearance: none;
  cursor: pointer;
  font: inherit;
  padding: .46em .8em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #101620;
  color: var(--ink);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .04) inset;
}

button:hover,
.btn:hover {
  filter: brightness(1.06);
}

button:focus-visible,
.btn:focus-visible {
  outline: 0;
  box-shadow: 0 0 0 3px var(--ring);
}

/* 小さめの操作ボタン（加速/減速/報告） */
.btn-s {
  padding: .35em .65em;
  font-size: .95em;
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--muted);
}

.btn-danger {
  border-color: #4a2733;
  background: #1a0f13;
  color: #ffc6cf;
}

.btn-primary {
  color: #0a0d12;
  background: linear-gradient(180deg, var(--accent), #6e88ff);
  border-color: #5b6fc8;
  box-shadow: 0 2px 0 #586fff inset, 0 1px 0 rgba(255, 255, 255, .06) inset;
}

/* ボタングループ */
.actions {
  display: flex;
  gap: .4rem;
  align-items: center;
  flex-wrap: wrap;
}

/* ---------- report pop (簡易ポップ、今のHTMLに載せるだけでOK) ---------- */
.report {
  position: relative;
  display: flex;
  gap: .4rem;
  align-items: center;
  flex-wrap: wrap;
}

.report-pop {
  position: absolute;
  right: 0;
  top: calc(100% + .4rem);
  width: min(92vw, 280px);
  background: #0f141b;
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: 0 12px 28px rgba(0, 0, 0, .35);
  padding: .4rem;
  display: none;
}

.report-pop.is-open {
  display: block;
}

.report-pop header {
  font-size: .95em;
  color: var(--muted);
  padding: .35rem .4rem .25rem;
}

.report-list {
  list-style: none;
  margin: 0;
  padding: .2rem;
}

.report-list li {
  margin: .1rem 0;
}

.report-list button {
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  padding: .5rem .6rem;
  border-radius: .5rem;
}

.report-list button:hover {
  background: #0e1622;
  border-color: #2c3a52;
}

/* ---------- tables & lists ---------- */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: .6em 0;
  background: var(--bg1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

th,
td {
  padding: .7em .9em;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--muted);
  background: #0f141b;
}

tr:last-child td {
  border-bottom: 0;
}

tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, .02);
}

/* ---------- selection ---------- */
::selection {
  background: #2b3a66;
  color: #fff;
}

/* 既存のスタイルの下に足す */
.report-list {
  list-style: none;
  margin: 0;
  padding: .2rem;
}

[hidden] {
  display: none !important;
}

.site-nav {
  font-size: 0.9rem;
  /* 本文より少し小さくして補助情報っぽく */
  margin-bottom: 0.1rem;
  /* 下に余白をあけて、板一覧と分ける */
}

.site-nav a {
  margin-right: 0.5rem;
  /* ／の前後にちょっと余白 */
}

/* ----- footer ----- */
.site-footer {
  margin-top: 2rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  align-items: center;
  margin-bottom: .5rem;
}

.site-footer-nav a {
  text-decoration: none;
}

.site-footer-nav a::after {
  content: "／";
  margin-left: .4rem;
}

.site-footer-nav a:last-child::after {
  content: "";
  margin: 0;
}

.site-footer-tips {
  margin: .4rem 0 .2rem;
  line-height: 1.7;
}

.site-footer-copy {
  margin: .6rem 0 0;
  font-size: .8rem;
  opacity: .7;
}

/* ----- CC BY-SA 同意モーダル ----- */
.cc-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.cc-backdrop.is-active {
  display: flex;
}

.cc-modal {
  background: #fff;
  max-width: 480px;
  width: 90%;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  line-height: 1.7;
  color: #111;
}

.cc-modal h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.cc-modal p {
  margin: 0.4rem 0;
}

.cc-modal-actions {
  margin-top: 1rem;
  text-align: right;
}

.cc-modal button {
  padding: 0.4rem 1rem;
  border-radius: 4px;
  border: 1px solid #333;
  background: #333;
  color: #fff;
  cursor: pointer;
}

.cc-modal button:hover {
  opacity: 0.9;
}