:root {
  --bg: #070b16;
  --panel: rgba(23, 31, 52, 0.72);
  --panel-solid: #171f34;
  --panel2: rgba(31, 42, 68, 0.75);
  --panel2-solid: #1f2a44;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #eef2fb;
  --muted: #93a0bd;
  --accent: #5b8cff;
  --accent2: #38d9c0;
  --violet: #8b6cf7;
  --danger: #ff6b7a;
  --warn: #ffb347;
  --grad: linear-gradient(135deg, #5b8cff 0%, #38d9c0 100%);
  --grad-violet: linear-gradient(135deg, #8b6cf7 0%, #5b8cff 100%);
  --radius: 18px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic Medium", "Meiryo", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
  min-height: 100vh;
}

/* オーロラ風の背景グロー */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(91, 140, 255, 0.22), transparent 60%),
    radial-gradient(700px 450px at -10% 30%, rgba(56, 217, 192, 0.14), transparent 60%),
    radial-gradient(800px 600px at 50% 110%, rgba(139, 108, 247, 0.14), transparent 60%),
    var(--bg);
}

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

/* ---------- ヘッダー ---------- */
header.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: rgba(10, 14, 26, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
header.topbar h1 {
  font-size: 19px;
  margin: 0;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: linear-gradient(90deg, #fff 0%, #a9c4ff 60%, #6fe3d0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
header.topbar h1::before {
  content: "◍ ";
  -webkit-text-fill-color: #5b8cff;
}
header.topbar .badge {
  font-size: 11.5px;
  font-weight: 600;
  color: #bcd0f7;
  border: 1px solid var(--line-strong);
  background: rgba(91, 140, 255, 0.12);
  padding: 3px 12px;
  border-radius: 999px;
  letter-spacing: 0.04em;
}
header.topbar .spacer { flex: 1; }

/* ---------- レイアウト ---------- */
.container { max-width: 1000px; margin: 0 auto; padding: 28px 20px 60px; }
.container.narrow { max-width: 580px; }

.card {
  background: var(--panel);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 26px 24px;
  margin-bottom: 22px;
  box-shadow: var(--shadow);
}
.card h2 {
  margin: 0 0 18px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.card h2::before {
  content: "";
  width: 5px;
  height: 20px;
  border-radius: 3px;
  background: var(--grad);
  flex: none;
}
.card h3 {
  margin: 22px 0 10px;
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---------- フォーム ---------- */
label { display: block; font-size: 12.5px; font-weight: 600; color: var(--muted); margin: 14px 0 6px; letter-spacing: 0.03em; }
input, select, button, textarea { font-family: inherit; font-size: 15px; }
input[type=text], input[type=number], select {
  width: 100%;
  padding: 11px 14px;
  background: rgba(10, 15, 28, 0.6);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}
input::placeholder { color: #5a6580; }
input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(91, 140, 255, 0.22);
}

.row { display: flex; gap: 14px; flex-wrap: wrap; }
.row > div { flex: 1; min-width: 130px; }

/* ---------- ボタン ---------- */
button {
  cursor: pointer;
  border: none;
  border-radius: 11px;
  padding: 12px 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  background: var(--grad);
  box-shadow: 0 4px 16px rgba(91, 140, 255, 0.35);
  transition: transform .12s, box-shadow .12s, filter .12s;
}
button:hover { transform: translateY(-1px); box-shadow: 0 7px 22px rgba(91, 140, 255, 0.45); filter: brightness(1.05); }
button:active { transform: translateY(0); }
button:disabled { opacity: .4; cursor: not-allowed; transform: none; }
button.secondary {
  background: var(--panel2);
  border: 1px solid var(--line-strong);
  color: var(--text);
  box-shadow: none;
}
button.secondary:hover { box-shadow: 0 4px 14px rgba(0,0,0,.3); border-color: var(--accent); }
button.ghost { background: transparent; border: 1px solid var(--line-strong); color: var(--muted); box-shadow: none; }
button.ghost:hover { color: var(--text); border-color: var(--accent); box-shadow: none; }
button.danger { background: linear-gradient(135deg, #ff6b7a, #ff8f5b); box-shadow: 0 4px 16px rgba(255, 107, 122, 0.3); }
button.big { font-size: 19px; padding: 17px 30px; border-radius: 14px; }
button.wide { width: 100%; }

/* ---------- ユーティリティ ---------- */
.muted { color: var(--muted); }
.small { font-size: 13px; }
.mono { font-family: ui-monospace, "SF Mono", Menlo, monospace; }
.hidden { display: none !important; }
.pill {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
  background: rgba(91, 140, 255, 0.12);
  border: 1px solid var(--line-strong);
  color: #bcd0f7;
}

/* ---------- テーブル ---------- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 700; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tbody tr { transition: background .12s; }
tbody tr:hover { background: rgba(91, 140, 255, 0.06); }

/* ---------- セッション一覧 ---------- */
.sessions-list .sess {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel2);
  margin-bottom: 10px;
  cursor: pointer;
  transition: transform .12s, border-color .12s, box-shadow .12s;
}
.sessions-list .sess:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}
.sessions-list .sess.active {
  border-color: transparent;
  background:
    linear-gradient(var(--panel2-solid), var(--panel2-solid)) padding-box,
    var(--grad) border-box;
  border: 1px solid transparent;
  box-shadow: 0 6px 24px rgba(91, 140, 255, 0.25);
}
.sess .code {
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 3px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.sess .meta { flex: 1; }
.sess .count { text-align: right; }

.joinbox {
  background: rgba(56, 217, 192, 0.07);
  border: 1px solid rgba(56, 217, 192, 0.25);
  border-radius: 12px;
  padding: 15px 18px;
  margin: 14px 0;
  font-size: 14px;
  word-break: break-all;
}

/* ---------- 強度スライダー(縦) ---------- */
.ti-stage { display: flex; gap: 28px; align-items: stretch; justify-content: center; margin: 14px 0; }
.slider-wrap { display: flex; flex-direction: column; align-items: center; gap: 10px; user-select: none; -webkit-user-select: none; }
.slider-track {
  position: relative;
  width: 96px;
  height: 340px;
  background: linear-gradient(to top, rgba(10, 16, 32, 0.9), rgba(28, 42, 74, 0.9));
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  touch-action: none;
  cursor: ns-resize;
  overflow: hidden;
  box-shadow: inset 0 2px 12px rgba(0, 0, 0, 0.5);
}
.slider-fill {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  background: linear-gradient(to top, #38d9c0, #5b8cff, #8b6cf7);
  height: 0%;
  opacity: 0.9;
}
.slider-knob {
  position: absolute;
  left: -2px; right: -2px;
  height: 10px;
  background: #fff;
  border-radius: 5px;
  bottom: 0;
  box-shadow: 0 0 14px rgba(255, 255, 255, 0.7), 0 2px 8px rgba(0, 0, 0, 0.5);
}
.slider-value {
  font-size: 34px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.slider-anchor { font-size: 12px; font-weight: 600; color: var(--muted); letter-spacing: 0.04em; }

.timer { font-size: 44px; font-weight: 900; font-variant-numeric: tabular-nums; text-align: center; }
.attr-name { font-size: 26px; font-weight: 800; text-align: center; }
.attr-name .em {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- プロット ---------- */
.plot-wrap {
  background: rgba(10, 15, 28, 0.55);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
}
canvas { width: 100%; display: block; }
#resultCanvas { height: 380px; }
#reviewCanvas { height: 240px; }
#liveCanvas { height: 150px; }
#compareCanvas { height: 360px; }
@media (max-width: 640px) {
  #resultCanvas { height: 280px; }
  #compareCanvas { height: 280px; }
}

input[type=checkbox] { accent-color: var(--accent); width: 16px; height: 16px; cursor: pointer; }

/* ---------- iPhone用QRコード ---------- */
.qr-row { display: flex; gap: 20px; flex-wrap: wrap; }
.qr-box {
  flex: 1;
  min-width: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 18px 14px;
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 14px;
}
.qr-label { font-size: 14px; font-weight: 700; }
.qr-img {
  background: #fff;              /* QRは白背景でないとカメラが読み取りにくい */
  padding: 12px;
  border-radius: 12px;
  width: 180px;
  height: 180px;
}
.qr-img svg { width: 100%; height: 100%; display: block; }
.qr-url { font-size: 12px; color: var(--muted); word-break: break-all; text-align: center; }

/* URLはタップ一発で全選択できるようにする(手動コピーしやすく) */
#joinUrl, .qr-url {
  -webkit-user-select: all;
  user-select: all;
}

/* ---------- 評価手法トグル ---------- */
.method-toggle { display: flex; gap: 12px; flex-wrap: wrap; }
.method-option {
  flex: 1;
  min-width: 220px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel2);
  cursor: pointer;
  color: var(--text);
  font-size: 14px;
  transition: border-color .12s, box-shadow .12s;
}
.method-option:hover { border-color: var(--accent); }
.method-option:has(input:checked) {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 4px 18px rgba(91, 140, 255, 0.2);
}
.method-option input { flex: none; }

/* ---------- TDS 属性選択チップ(ホストのセッション作成) ---------- */
.chip-grid { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 6px; }
.chip {
  background: var(--panel2);
  border: 1px solid var(--line-strong);
  color: var(--muted);
  border-radius: 999px;
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: none;
  transition: border-color .12s, color .12s, background .12s;
}
.chip:hover {
  border-color: var(--accent);
  color: var(--text);
  transform: none;
  box-shadow: none;
  filter: none;
}
.chip.on {
  background: rgba(91, 140, 255, 0.16);
  border-color: var(--accent);
  color: #cfe0ff;
}
.chip.custom { border-style: dashed; }
.chip.custom.on {
  background: rgba(56, 217, 192, 0.14);
  border-color: var(--accent2);
  color: #b8f0e4;
}
.chip-num {
  display: inline-flex;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  align-items: center;
  justify-content: center;
  margin-right: 7px;
  vertical-align: -3px;
}
.chip.custom.on .chip-num { background: var(--accent2); color: #06281f; }

/* ---------- TDS 属性ボタン ---------- */
.attr-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: 10px 0;
}
.attr-btn {
  --attr-color: var(--accent);
  background: var(--panel2);
  border: 2px solid var(--line-strong);
  color: var(--text);
  font-size: 19px;
  font-weight: 800;
  padding: 22px 10px;
  border-radius: 14px;
  box-shadow: none;
  transition: transform .1s, border-color .1s, background .1s, box-shadow .1s;
}
.attr-btn:hover { border-color: var(--attr-color); transform: translateY(-1px); box-shadow: none; }
.attr-btn.selected {
  background: var(--attr-color);
  border-color: var(--attr-color);
  color: #0b0f1a;
  box-shadow: 0 0 20px color-mix(in srgb, var(--attr-color) 55%, transparent), 0 4px 14px rgba(0,0,0,.4);
  transform: scale(1.03);
}

.timeline-canvas { height: 76px; }
.swatch-inline {
  display: inline-block;
  width: 12px; height: 12px;
  border-radius: 3px;
  margin-right: 7px;
  vertical-align: -1px;
}
.method-pill { font-size: 10.5px; padding: 1px 8px; margin-right: 6px; }
.method-pill.tds { background: rgba(56, 217, 192, 0.14); color: #7fe8d4; border-color: rgba(56, 217, 192, 0.4); }
.sig-pill {
  font-size: 10.5px; padding: 1px 8px; margin-left: 6px;
  background: rgba(53, 208, 165, 0.15); color: #6fe3c4; border-color: rgba(53, 208, 165, 0.45);
}

/* ---------- TDS セッション比較(属性ごとの小グラフ) ---------- */
.tds-cmp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 16px;
  margin: 10px 0;
}
.tds-cmp-cell .tds-cmp-title {
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 6px;
  letter-spacing: 0.03em;
}
@media (max-width: 640px) {
  .tds-cmp-grid { grid-template-columns: 1fr; }
}

/* ---------- セッション比較 ---------- */
.compare-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.compare-item {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 15px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel2);
  cursor: pointer;
  font-size: 14px;
  margin: 0;
  color: var(--text);
  transition: border-color .12s;
}
.compare-item:hover { border-color: var(--accent); }
.compare-item input { flex: none; }

/* ---------- トースト ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  background: rgba(23, 31, 52, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--line-strong);
  color: var(--text);
  padding: 13px 24px;
  border-radius: 12px;
  z-index: 100;
  box-shadow: 0 10px 36px rgba(0, 0, 0, 0.5);
  font-weight: 600;
  animation: toast-in .25s ease;
}
@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, 10px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* ---------- 統計カード ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 12px; }
.stat {
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  transition: transform .12s, border-color .12s;
}
.stat:hover { transform: translateY(-2px); border-color: var(--line-strong); }
.stat .k { font-size: 11.5px; font-weight: 600; color: var(--muted); letter-spacing: 0.03em; }
.stat .v {
  font-size: 24px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(90deg, #fff, #a9c4ff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat .v .u { font-size: 12px; color: var(--muted); -webkit-text-fill-color: var(--muted); }

.legend { display: flex; flex-wrap: wrap; gap: 14px; font-size: 13px; margin-top: 10px; }
.legend .item { display: flex; align-items: center; gap: 7px; color: var(--muted); }
.legend .swatch { width: 18px; height: 5px; border-radius: 3px; }

.footer-note { color: var(--muted); font-size: 12px; text-align: center; padding: 20px; }

/* ---------- file:// 直開き警告 ---------- */
.file-warning {
  background: linear-gradient(135deg, rgba(255, 179, 71, 0.15), rgba(255, 107, 122, 0.15));
  border: 1px solid rgba(255, 179, 71, 0.5);
  border-radius: 14px;
  padding: 18px 22px;
  margin: 20px;
  font-size: 14px;
  line-height: 1.8;
}
.file-warning strong { color: var(--warn); }
.file-warning code {
  background: rgba(0, 0, 0, 0.35);
  padding: 2px 8px;
  border-radius: 6px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 13px;
}

/* ---------- スクロールバー ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.14); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.25); }

/* ---------- スマホ最適化 ---------- */
* { -webkit-tap-highlight-color: transparent; }
button { touch-action: manipulation; }  /* ダブルタップズーム防止 */
html, body { overscroll-behavior-y: none; }  /* 引っ張り更新の暴発防止 */

@media (max-width: 640px) {
  .card { padding: 18px 14px; }
  .container { padding: 14px 10px 44px; }
  header.topbar { padding: 12px 14px; gap: 8px; }
  header.topbar h1 { font-size: 16px; }
  header.topbar .badge { font-size: 10px; padding: 2px 8px; }

  /* iOSは入力欄のフォントが16px未満だとフォーカス時に勝手にズームするため */
  input[type=text], input[type=number], select { font-size: 16px; }

  button.big { font-size: 18px; padding: 16px 18px; }
  .method-option { min-width: 100%; }
  .row > div { min-width: 100%; }

  /* TI: スライダーを画面の高さに合わせて大きく(指で操作しやすく) */
  .slider-track { height: 46vh; min-height: 280px; width: 116px; }
  .slider-knob { height: 14px; border-radius: 7px; }
  .timer { font-size: 34px; }
  .attr-name { font-size: 19px; }

  /* TDS: 属性ボタンを2列固定で大きく */
  .attr-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .attr-btn { font-size: 17px; padding: 20px 6px; }

  .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 9px; }
  .stat { padding: 11px 12px; }
  .stat .v { font-size: 19px; }

  .sess { padding: 12px 12px; gap: 12px; }
  .sess .code { font-size: 18px; letter-spacing: 2px; }
  .compare-item { padding: 10px 12px; gap: 8px; font-size: 13px; }

  th, td { padding: 7px 7px; font-size: 12.5px; }
  .joinbox { font-size: 12.5px; padding: 12px 13px; }
  .chip { padding: 9px 15px; font-size: 14px; }

  #resultCanvas { height: 280px; }
  #compareCanvas { height: 260px; }
  #reviewCanvas { height: 200px; }
}