:root {
  --bg: #14161c;
  --panel: #1e222b;
  --panel2: #262b36;
  --ink: #e8ecf3;
  --muted: #8a93a6;
  --line: #333a49;
  --accent: #4ea1ff;
  --accent2: #ffb14e;
  --sel: rgba(78,161,255,0.22);
  --loop: rgba(255,177,78,0.28);
  --good: #55d187;
  --bad: #ff6b6b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Yu Gothic UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
}
header {
  padding: 14px 22px 8px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
}
.tut-launch { font-size: 13px; padding: 7px 12px; white-space: nowrap; }
.head-actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.drop-hint { margin-top: 10px; }
header h1 { margin: 0; font-size: 22px; letter-spacing: 1px; }
header h1::before { content: "↻ "; color: var(--accent2); }
.tag { margin: 2px 0 0; color: var(--muted); font-size: 13px; }
main { padding: 16px 22px 60px; max-width: 1100px; margin: 0 auto; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 14px;
}

/* ドロップゾーン */
.drop { border-style: dashed; text-align: center; }
.drop.dragover { border-color: var(--accent); background: var(--panel2); }
.drop-inner strong { font-size: 16px; display: block; margin-bottom: 4px; }
.drop-inner span { color: var(--muted); font-size: 13px; }
.link { background: none; border: none; color: var(--accent); cursor: pointer; font: inherit; text-decoration: underline; padding: 0; }
.meta { margin-top: 8px; color: var(--muted); font-size: 12px; }

/* 波形 */
.wave-wrap { width: 100%; background: #0d0f14; border-radius: 6px; overflow: hidden; }
#wave { display: block; width: 100%; height: 220px; cursor: crosshair; }
.overview-wrap { width: 100%; background: #0d0f14; border-radius: 6px; overflow: hidden; margin-top: 6px; }
#overview { display: block; width: 100%; height: 56px; cursor: pointer; }
.view-row { display: flex; align-items: center; gap: 14px; margin-top: 10px; flex-wrap: wrap; }
.view-row label { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); }
.grow { flex: 1; }
input[type=range] { accent-color: var(--accent); }
.readout { font-variant-numeric: tabular-nums; color: var(--accent); font-size: 13px; min-width: 70px; text-align: right; }
.readout.pos { min-width: 160px; }
.transport .seek { flex: 1; min-width: 180px; }
input[type=range]:disabled { opacity: .35; }

/* コントロール */
.controls { display: flex; flex-direction: column; gap: 14px; }
.group { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding-bottom: 12px; border-bottom: 1px dashed var(--line); }
.group:last-child { border-bottom: none; padding-bottom: 0; }
.group-title { width: 100%; font-size: 13px; font-weight: 600; color: var(--ink); letter-spacing: .3px; margin-bottom: 4px; }
.group.loop .group-title, .group.export .group-title { color: var(--accent2); }

button {
  background: var(--panel2);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 8px 12px;
  font-size: 13px;
  cursor: pointer;
  transition: .12s;
}
button:hover:not(:disabled) { border-color: var(--accent); background: #2e3543; }
button:disabled { opacity: .4; cursor: not-allowed; }
button.big { background: var(--accent); color: #08111e; border-color: var(--accent); font-weight: 600; }
button.big:hover:not(:disabled) { background: #6fb4ff; }
button.mini { padding: 4px 10px; font-size: 12px; }
button.toggle.active { background: var(--accent2); color: #2a1a04; border-color: var(--accent2); font-weight: 600; }

label { font-size: 13px; color: var(--ink); display: flex; align-items: center; gap: 5px; }
input[type=number] {
  width: 92px; background: #0d0f14; color: var(--ink);
  border: 1px solid var(--line); border-radius: 5px; padding: 5px 7px;
  font-variant-numeric: tabular-nums; font-size: 13px;
}
select { background: #0d0f14; color: var(--ink); border: 1px solid var(--line); border-radius: 5px; padding: 6px 8px; font-size: 13px; }
.hint { font-size: 11px; color: var(--muted); }

.result { width: 100%; margin-top: 6px; font-size: 13px; }
.result a { color: var(--accent); }
.result .size-good { color: var(--good); }
.result .size-bad { color: var(--bad); }

.status { position: fixed; left: 0; right: 0; bottom: 0; padding: 6px 22px; font-size: 12px; color: var(--muted); background: rgba(13,15,20,.9); border-top: 1px solid var(--line); }
.status.err { color: var(--bad); }
.status.ok { color: var(--good); }

/* ---------- 使い方ガイド（チュートリアル） ---------- */
.tut-block { position: fixed; inset: 0; z-index: 9000; display: none; }
body.tut-on .tut-block { display: block; }

.tut-spot {
  position: fixed; z-index: 9001; display: none;
  border-radius: 10px;
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 9999px rgba(8, 10, 14, 0.74);
  pointer-events: none;
  transition: left .25s ease, top .25s ease, width .25s ease, height .25s ease;
}
body.tut-on .tut-spot { display: block; }

.tut-card {
  position: fixed; z-index: 9002; display: none;
  width: 340px; max-width: calc(100vw - 24px);
  background: var(--panel2);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 16px 16px 14px;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.55);
}
body.tut-on .tut-card { display: block; }
.tut-card .tut-step { font-size: 11px; color: var(--accent); letter-spacing: .5px; }
.tut-card .tut-title { margin: 4px 0 8px; font-size: 16px; }
.tut-card .tut-body { margin: 0 0 14px; font-size: 13px; line-height: 1.8; color: var(--ink); }
.tut-nav { display: flex; align-items: center; gap: 10px; }
.tut-nav .tut-count { flex: 1; text-align: center; font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.tut-close {
  position: absolute; top: 6px; right: 10px;
  background: none; border: none; color: var(--muted);
  font-size: 20px; line-height: 1; padding: 2px 4px; cursor: pointer;
}
.tut-close:hover { color: var(--ink); }

/* ---------- ライブラリ（フォルダから曲を並べる） ---------- */
.lib-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.lib-title { font-weight: 600; font-size: 14px; max-width: 45%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lib-list { list-style: none; margin: 0; padding: 0; max-height: 260px; overflow-y: auto; display: flex; flex-direction: column; gap: 2px; }
.lib-item {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  width: 100%; text-align: left;
  background: transparent; border: 1px solid transparent; border-radius: 6px;
  padding: 7px 10px; font-size: 13px;
}
.lib-item:hover { background: var(--panel2); border-color: var(--line); }
.lib-item.active { background: rgba(78, 161, 255, 0.16); border-color: var(--accent); font-weight: 600; }
.lib-item .lib-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lib-item .lib-size { flex: none; color: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }

/* クリップ保持インジケータ（作業場ボード） */
.clip-info:not(:empty) {
  color: var(--accent2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 10px;
  background: rgba(255, 177, 78, 0.10);
}

/* ---------- 途中保存スロット ---------- */
.slot-save { display: flex; gap: 8px; margin-bottom: 12px; }
.slot-save input {
  flex: 1; min-width: 120px;
  background: #0d0f14; color: var(--ink);
  border: 1px solid var(--line); border-radius: 5px; padding: 7px 9px; font-size: 13px;
}
.slot-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 5px; max-height: 260px; overflow-y: auto; }
.slot-item {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel2);
}
.slot-info { overflow: hidden; }
.slot-name { font-weight: 600; font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.slot-sub { font-size: 11px; color: var(--muted); margin-top: 2px; }
.slot-acts { display: flex; gap: 6px; flex: none; }
.slot-empty { list-style: none; color: var(--muted); font-size: 13px; padding: 8px 2px; }

/* ---------- 確認ダイアログ ---------- */
.modal-back {
  position: fixed; inset: 0; z-index: 9500; display: none;
  align-items: center; justify-content: center;
  background: rgba(8, 10, 14, 0.62);
}
.modal-back.show { display: flex; }
.modal {
  background: var(--panel2); border: 1px solid var(--line); border-radius: 12px;
  padding: 20px; width: 380px; max-width: calc(100vw - 24px);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.55);
}
.modal-msg { margin: 0 0 18px; font-size: 14px; line-height: 1.8; }
.modal-acts { display: flex; justify-content: flex-end; gap: 10px; }
.modal-ok.danger { background: var(--bad); border-color: var(--bad); color: #240606; }
.modal-ok.danger:hover:not(:disabled) { background: #ff8585; }

/* ---------- 時間入力（m:ss.mmm） ---------- */
.time-in {
  width: 104px; background: #0d0f14; color: var(--ink);
  border: 1px solid var(--line); border-radius: 5px; padding: 5px 7px;
  font-variant-numeric: tabular-nums; font-size: 13px; text-align: right;
}
.time-in:focus { outline: none; border-color: var(--accent); }

/* ---------- 継ぎ目ビュー ---------- */
.seam-wrap { position: relative; width: 100%; background: #0d0f14; border-radius: 6px; overflow: hidden; }
#seamCanvas { display: block; width: 100%; height: 220px; cursor: ew-resize; }
.seam-empty {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 13px; pointer-events: none;
}
.seam-wrap.has-loop .seam-empty { display: none; }
.seam-row { display: flex; align-items: center; gap: 10px; width: 100%; flex-wrap: wrap; margin-top: 8px; }
.seam-row .seam-win { padding: 3px 8px; }
.seam-win.active { background: var(--accent2); color: #2a1a04; border-color: var(--accent2); font-weight: 600; }
.nudge-grp { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--muted); }
.nudge-grp button { padding: 3px 7px; font-size: 12px; }
.clickmode-row { width: 100%; display: flex; align-items: center; gap: 6px; margin-top: 4px; }
.clickmode.active { background: var(--accent); color: #08111e; border-color: var(--accent); font-weight: 600; }
#seamGap { min-width: 96px; }
#seamGap.gap-good { color: var(--good); }
#seamGap.gap-bad { color: var(--bad); }

/* ==================== 情景（シーン背景）＝アンビエント化 ==================== */
:root { --scrim: 0.55; }
/* 背景2枚重ねでクロスフェード。既定は透明＝現行のダーク見た目のまま。 */
.scene-bg {
  position: fixed; inset: 0; z-index: -3;
  background-size: cover; background-position: center; background-repeat: no-repeat;
  opacity: 0; transition: opacity .7s ease;
  pointer-events: none;
}
.scene-bg.show { opacity: 1; }
#sceneScrim {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  opacity: 0; transition: opacity .7s ease;
  background: radial-gradient(ellipse at 50% 28%,
    rgba(8,10,14, calc(var(--scrim) * 0.68)),
    rgba(8,10,14, var(--scrim)) 78%);
}
body.scene-on #sceneScrim { opacity: 1; }

/* シーンON時だけパネルをガラス化（OFF＝従来の見た目を完全維持） */
body.scene-on header {
  background: rgba(14,16,22,0.55);
  backdrop-filter: blur(12px) saturate(1.05);
  -webkit-backdrop-filter: blur(12px) saturate(1.05);
  border-bottom-color: rgba(255,255,255,0.10);
}
body.scene-on .panel {
  background: rgba(22,25,32,0.56);
  border-color: rgba(255,255,255,0.10);
  backdrop-filter: blur(14px) saturate(1.08);
  -webkit-backdrop-filter: blur(14px) saturate(1.08);
  box-shadow: 0 6px 26px rgba(0,0,0,0.34);
}
body.scene-on .drop { background: rgba(22,25,32,0.42); }
body.scene-on .wave-wrap,
body.scene-on .overview-wrap,
body.scene-on .seam-wrap { background: rgba(6,8,12,0.74); }
body.scene-on .time-in,
body.scene-on input[type=number],
body.scene-on input[type=text],
body.scene-on select { background: rgba(6,8,12,0.62); }
body.scene-on .status {
  background: rgba(10,12,16,0.66);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top-color: rgba(255,255,255,0.08);
}

/* 情景パネル */
.scene-panel { }
.scene-scrim-ctl { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); }
.scene-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.scene-chip {
  position: relative; width: 132px; height: 74px; border-radius: 9px; overflow: hidden;
  border: 2px solid var(--line); cursor: pointer; padding: 0; background: #0d0f14;
  background-size: cover; background-position: center; transition: .15s;
}
.scene-chip:hover { border-color: var(--accent); transform: translateY(-1px); }
.scene-chip.active { border-color: var(--accent2); box-shadow: 0 0 0 2px rgba(255,177,78,0.35); }
.scene-chip .chip-label {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 4px 7px; font-size: 12px; text-align: left; color: #fff;
  background: linear-gradient(rgba(0,0,0,0), rgba(0,0,0,0.78));
  text-shadow: 0 1px 2px rgba(0,0,0,0.8);
}
.scene-chip.none { display: flex; align-items: center; justify-content: center; color: var(--muted); font-size: 13px; }
.scene-chip.none .chip-label { background: none; position: static; text-align: center; }
.scene-credit { margin-top: 12px; font-size: 12px; color: var(--muted); }
.scene-credit a { color: var(--accent); }

/* 動画書き出しグループ */
.group.video .group-title { color: var(--accent2); }
#vidProgress { color: var(--accent2); }