/* ==========================================================================
   AIMIX LP — スタンドアロンCSS。
   本番アプリ(frontend/style.css)のデザイントークン・見た目は参照するが、
   このファイルはfrontend/style.cssに依存しない（本番CSSが変わってもLPは
   壊れない）。必要な値だけここに書き写している。
   ========================================================================== */

:root {
  --bg-top: #0b0e16;
  --bg-bot: #05060a;
  --card-bg: #12151f;
  --card-bg-soft: #171b28;
  --card-bg-raised: #1b202f;
  --border: #232838;
  --border-soft: #1a1e2b;
  --text: #eceef4;
  --text-dim: #8b90a3;
  --text-dimmer: #5c6178;
  --accent: #4f9dff;
  --accent-2: #7c6cff;
  --accent-glow: rgba(79, 157, 255, 0.32);
  --accent-glow-soft: rgba(79, 157, 255, 0.14);
  --purple: #a78bfa;
  --purple-glow: rgba(167, 139, 250, 0.22);
  --success: #34d399;
  --radius-lg: 18px;
  --radius: 14px;
  --radius-sm: 10px;
  --font: "Segoe UI", system-ui, -apple-system, "Hiragino Kaku Gothic ProN", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bot) 100%);
  color: var(--text);
  font-family: var(--font);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.icon, svg { width: 1em; height: 1em; }

.section-inner { max-width: 1120px; margin: 0 auto; padding: 0 28px; }
.section { position: relative; padding: 6.5rem 0; }

.section-eyebrow {
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.14em;
  color: var(--accent); text-transform: uppercase; margin: 0 0 0.7rem;
}
.section-title { font-size: clamp(1.5rem, 3vw, 2.15rem); font-weight: 800; margin: 0 0 0.9rem; letter-spacing: -0.01em; }
.section-lead { color: var(--text-dim); font-size: 1rem; line-height: 1.75; max-width: 640px; margin: 0 0 2.6rem; }

/* ---------- reveal (IntersectionObserver駆動の軽量フェード) ---------- */
[data-reveal] { opacity: 0; transform: translateY(22px); }
[data-reveal].is-visible {
  opacity: 1; transform: translateY(0);
  transition: opacity 0.7s cubic-bezier(.22,.68,.29,1), transform 0.7s cubic-bezier(.22,.68,.29,1);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.85rem 1.7rem; border-radius: 999px; font-weight: 700; font-size: 0.95rem;
  border: 1px solid transparent; cursor: pointer; font-family: inherit; white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff;
  box-shadow: 0 8px 28px var(--accent-glow);
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { color: var(--text); border-color: var(--border); background: rgba(255,255,255,0.02); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-large { padding: 1.05rem 2.4rem; font-size: 1.02rem; }

.check-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.7rem; }
.check-list li {
  position: relative; padding-left: 1.7rem; color: var(--text-dim); line-height: 1.6; font-size: 0.95rem;
}
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 0.35rem; width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent-glow-soft); border: 1px solid var(--accent);
}
.check-list li::after {
  content: ""; position: absolute; left: 5px; top: 0.62rem; width: 6px; height: 3px;
  border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg);
}

/* ---------- Header ---------- */
.lp-header {
  position: sticky; top: 0; z-index: 40; display: flex; align-items: center; justify-content: space-between;
  padding: 0.85rem 1.8rem; background: rgba(8, 10, 16, 0.78); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
}
.lp-brand { display: flex; align-items: center; gap: 0.55rem; }
.lp-brand-icon { width: 30px; height: 30px; border-radius: 8px; }
.lp-brand-name { font-weight: 800; letter-spacing: 0.02em; font-size: 1rem; }
.lp-nav { display: flex; align-items: center; gap: 1.4rem; font-size: 0.88rem; }
.lp-nav a:not(.lp-nav-cta) { color: var(--text-dim); }
.lp-nav a:not(.lp-nav-cta):hover { color: var(--text); }
.lp-nav-cta {
  padding: 0.55rem 1.2rem; border-radius: 999px; background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-weight: 700;
}

/* ==========================================================================
   1. Hero
   ========================================================================== */
.hero {
  min-height: 100svh; display: flex; align-items: center; justify-content: center; text-align: center;
  padding: 8rem 0 5rem; overflow: hidden;
}
.hero-media { position: absolute; inset: 0; overflow: hidden; z-index: 0; background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bot) 100%); }
.hero-video, .hero-poster {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  /* 実写素材の中心の輪(ややオレンジ寄りに生成された)がHeroコピーとぶつからないよう、
     スケール+下方シフトで下寄り・背景寄りの構図に補正する（再生成せずCSSで調整）。 */
  transform: scale(1.35) translateY(13%);
}
.hero-poster { display: none; }
/* モバイル/prefers-reduced-motionではJSが.is-posterを付与し、動画の代わりに静止画を表示する
   （<source>自体を注入しないため動画データ通信は発生しない） */
.hero-media.is-poster .hero-video { display: none; }
.hero-media.is-poster .hero-poster { display: block; }
.hero-video-tint {
  position: absolute; inset: 0;
  background: linear-gradient(120deg, #3b6fff 0%, #7c6cff 55%, #a78bfa 100%);
  mix-blend-mode: color; opacity: 0.85;
}
.hero-scrim {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 62% 58% at 50% 42%, rgba(5,6,10,0.82) 0%, rgba(5,6,10,0.5) 55%, rgba(5,6,10,0.18) 78%, transparent 100%),
    linear-gradient(180deg, rgba(5,6,10,0.62) 0%, rgba(5,6,10,0.15) 30%, rgba(5,6,10,0.4) 68%, rgba(5,6,10,0.85) 100%);
}
.hero-inner { position: relative; z-index: 2; max-width: 760px; padding: 0 24px; }

/* Heroのコピー(eyebrow→タイトル2行→サブコピー→CTA)が、動画終盤(またはposter
   モード時はタイムアウト)から「全体がゆっくり呼吸するように」浮かび上がる一度
   きりの演出。0.2〜0.3秒ずつ重なるstaggerで、個々を待たず全体が緩やかに完成する
   印象にする。価値訴求ストリップは対象外＝常時表示。 */
.hero-reveal-item {
  opacity: 0; transform: translateY(20px); filter: blur(10px);
  transition: opacity 1.5s cubic-bezier(.22,1,.36,1), transform 1.5s cubic-bezier(.22,1,.36,1), filter 1.5s cubic-bezier(.22,1,.36,1);
}
#hero-copy.is-revealed .hero-reveal-item { opacity: 1; transform: translateY(0); filter: blur(0); }
.hero-eyebrow {
  font-size: 0.8rem; font-weight: 700; letter-spacing: 0.2em; color: var(--accent-2);
  text-transform: uppercase; margin: 0 0 1.1rem;
}
.hero-title { font-size: clamp(2rem, 5.2vw, 3.4rem); font-weight: 800; line-height: 1.32; margin: 0 0 1.3rem; letter-spacing: -0.01em; }
.hero-title-accent {
  background: linear-gradient(135deg, var(--accent), var(--purple));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { color: var(--text-dim); font-size: 1.08rem; line-height: 1.85; margin: 0 0 2.3rem; }
.hero-cta-row { display: flex; align-items: center; justify-content: center; gap: 0.9rem; flex-wrap: wrap; margin-bottom: 3rem; }

/* Heroメインコピー直下の3価値カード。ブランド名ではなく「使うとどう楽に
   なるか」を主役にする（TIME/COST/NEXT SONG）。小さめ・余白多め・透明感
   のある濃紺パネルで、Hero動画の邪魔をしない。hero-reveal-itemを流用し、
   メインコピー→サブコピー→CTA→カードの順で同じ演出パターンのまま
   staggerする（新規のアニメーション機構は追加しない）。 */
.hero-value-cards {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem;
  max-width: 940px; margin: 0 auto; text-align: left;
}
.hero-value-card {
  background: rgba(10,14,24,0.42); backdrop-filter: blur(6px);
  border: 1px solid rgba(124,108,255,0.28); border-radius: var(--radius-lg);
  padding: 1.1rem 1.25rem; box-shadow: 0 0 24px rgba(79,157,255,0.1);
}
.hero-value-card-label {
  display: block; font-size: 0.66rem; font-weight: 800; letter-spacing: 0.14em;
  color: var(--accent-2); text-transform: uppercase; margin-bottom: 0.5rem;
}
.hero-value-card-text { margin: 0; font-size: 0.85rem; line-height: 1.6; color: var(--text-dim); }

.hero-scroll-cue {
  position: absolute; left: 50%; bottom: 2.2rem; transform: translateX(-50%);
  width: 22px; height: 36px; border: 2px solid var(--border); border-radius: 20px; z-index: 2;
}
.hero-scroll-cue span {
  position: absolute; top: 6px; left: 50%; width: 4px; height: 8px; border-radius: 2px;
  background: var(--accent); transform: translateX(-50%); animation: cue-bounce 1.6s ease-in-out infinite;
}
@keyframes cue-bounce { 0%,100% { top: 6px; opacity: 1; } 60% { top: 16px; opacity: 0.3; } }

/* ==========================================================================
   2. 3 STEP
   ========================================================================== */
.steps { position: relative; overflow: hidden; }
.steps-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
/* 3 STEPの主役演出: 青(Vocal)/紫(Instrumental)の2本の線がSTEP1では
   離れ、STEP3で中央へ合流する。控えめすぎた前回よりopacity/太さ/glowを
   強め、「演出がある」と一目でわかるようにした。 */
.steps-bg-line {
  position: absolute; left: -5%; right: -5%; height: 2px; opacity: 0.55;
  transition: opacity 0.6s;
}
.steps-bg-line-vocal {
  top: 38%; background: linear-gradient(90deg, transparent, #4f9dff 30%, #4f9dff 70%, transparent);
  box-shadow: 0 0 24px rgba(79,157,255,0.55); transform: translateY(-58px);
}
.steps-bg-line-inst {
  top: 64%; background: linear-gradient(90deg, transparent, #9b7bff 30%, #9b7bff 70%, transparent);
  box-shadow: 0 0 24px rgba(155,123,255,0.5); transform: translateY(58px);
}
.steps .section-inner { position: relative; z-index: 1; }
/* セクション境界の連続感: Hero下端〜3 STEP上端、3 STEP下端〜実UIデモ上端に
   同じ配色のごく薄いグローの帯を渡し、切り替わりが唐突にならないようにする。 */
.steps::before, .steps::after {
  content: ""; position: absolute; left: 0; right: 0; height: 140px; z-index: 0; pointer-events: none;
}
.steps::before { top: 0; background: linear-gradient(180deg, rgba(79,157,255,0.05), transparent); }
.steps::after { bottom: 0; background: linear-gradient(0deg, rgba(155,123,255,0.06), transparent); }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.step-card {
  position: relative; background: var(--card-bg); border: 1px solid var(--border-soft); border-radius: var(--radius-lg);
  padding: 2rem 1.6rem 1.7rem;
}
.step-num { display: block; font-size: 0.78rem; font-weight: 800; color: var(--text-dimmer); letter-spacing: 0.08em; margin-bottom: 0.9rem; }
.step-icon {
  display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent-glow-soft), rgba(124,108,255,0.14)); color: var(--accent); margin-bottom: 1rem;
}
.step-icon svg { width: 22px; height: 22px; }
.step-card h3 { margin: 0 0 0.5rem; font-size: 1.05rem; }
.step-card p { margin: 0; color: var(--text-dim); font-size: 0.9rem; line-height: 1.7; }

/* ==========================================================================
   3. 実UIデモ（DOM/CSSレプリカ・ピン+スクラブ演出の中心）
   実UI(frontend/style.css)のクラス仕様を書き写して独立させたもの:
   .mix-button(168px円形+pulse-ring), .knob-dial(136pxデュアルリングSVG,
   gain=内側stroke-width10/trim=外側stroke-width6), .status-grid,
   .insight-item, .module-btn, .track-tab 等。
   ========================================================================== */
.demo { padding-bottom: 3rem; position: relative; }
.demo::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 160px; z-index: 0; pointer-events: none;
  background: linear-gradient(180deg, rgba(155,123,255,0.06), transparent);
}
/* UI本体は静止表示。実際の操作（ファイル投入/MIX開始/進捗/解析結果出現）を
   再現するアニメーションやスクロール連動のstate変化は行わない。動きは
   すべて.demo-stage-bg・同心円リング・パーティクル・カード背後の走査光と
   いった背景演出側に限定する（GSAP/ScrollTriggerはこのセクションでは不要）。 */
.demo-stage { position: relative; }
.demo-stage-bg {
  position: absolute; inset: -4rem 0; z-index: 0; pointer-events: none; overflow: hidden;
}
.demo-bg-line {
  position: absolute; left: -10%; right: -10%; height: 1.5px; opacity: 0.28;
  animation: demo-line-drift 11s ease-in-out infinite;
}
.demo-bg-line-a {
  top: 30%; background: linear-gradient(90deg, transparent, #4f9dff 35%, #4f9dff 65%, transparent);
  box-shadow: 0 0 18px rgba(79,157,255,0.4);
}
.demo-bg-line-b {
  top: 72%; background: linear-gradient(90deg, transparent, #9b7bff 35%, #9b7bff 65%, transparent);
  box-shadow: 0 0 18px rgba(155,123,255,0.35); animation-delay: -5.5s;
}
@keyframes demo-line-drift {
  0%, 100% { transform: translateX(-2%) scaleX(1); opacity: 0.2; }
  50% { transform: translateX(2%) scaleX(1.03); opacity: 0.34; }
}
.demo-bg-ripple {
  position: absolute; left: 50%; top: 46%; width: 120px; height: 120px; border-radius: 50%;
  transform: translate(-50%, -50%); border: 1px solid rgba(79,157,255,0.22);
  animation: demo-ripple 7s ease-out infinite;
}
.demo-bg-ripple-2 { animation-delay: -3.5s; border-color: rgba(167,139,250,0.18); }
@keyframes demo-ripple {
  0% { width: 120px; height: 120px; opacity: 0.45; }
  100% { width: 860px; height: 860px; opacity: 0; }
}
.demo-stage-inner {
  position: relative; z-index: 1; display: flex; align-items: center; justify-content: center;
  gap: 1.6rem; max-width: 1440px; margin: 0 auto; padding: 3rem 28px 4rem; flex-wrap: wrap;
}
.demo-col { flex: 1 1 280px; min-width: 240px; max-width: 360px; }
.demo-col-upload { display: grid; gap: 0.7rem; align-content: center; }
.demo-col-center {
  position: relative; display: flex; flex-direction: column; align-items: center; text-align: center;
  justify-content: center; gap: 1.1rem; flex: 1.7 1 420px; max-width: 560px; min-height: 480px;
}
.demo-col-status { display: grid; gap: 1rem; align-content: center; flex: 1 1 260px; max-width: 320px; }

.mock-info-note {
  font-size: 0.72rem; color: var(--text-dim); background: var(--accent-glow-soft);
  border: 1px solid rgba(79,157,255,0.35); border-radius: var(--radius-sm); padding: 0.5rem 0.7rem; line-height: 1.5;
}

.mock-card {
  position: relative; overflow: hidden;
  background: var(--card-bg); border: 1px solid var(--border-soft); border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
}
.mock-card-head { display: flex; align-items: center; gap: 0.45rem; font-size: 0.85rem; font-weight: 700; margin-bottom: 0.7rem; }
.mock-card-head-icon { width: 15px; height: 15px; color: var(--text-dim); flex-shrink: 0; }
.mock-note { color: var(--text-dimmer); font-weight: 400; font-size: 0.8em; margin-left: 0.3em; }
.mock-section-title { font-size: 0.85rem; font-weight: 700; color: var(--text-dim); margin-bottom: 0.8rem; letter-spacing: 0.02em; }
.mock-upload-card { padding: 0.85rem 0.95rem; }
.mock-upload-card-optional { opacity: 0.75; }
.mock-status-card, .mock-insights-card { border-color: rgba(79,157,255,0.22); background: rgba(18,21,31,0.75); }
/* 右カラムの2枚のカード背後を、ごく薄い走査光が常時ゆっくり流れる。「処理中」
   を示す演出ではなく、環境演出として大幅に低速・低コントラスト化している。 */
.mock-status-card::before, .mock-insights-card::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background: linear-gradient(100deg, transparent 40%, rgba(79,157,255,0.06) 50%, transparent 60%);
  background-size: 220% 100%; animation: demo-card-scan 9s linear infinite;
}
.mock-insights-card::before { animation-delay: -4.5s; background: linear-gradient(100deg, transparent 40%, rgba(155,123,255,0.06) 50%, transparent 60%); }
.mock-status-card > *, .mock-insights-card > * { position: relative; z-index: 1; }
@keyframes demo-card-scan { 0% { background-position: 130% 0; } 100% { background-position: -30% 0; } }

.mock-dropzone {
  position: relative; border: 1.5px dashed var(--border); border-radius: var(--radius-sm);
  padding: 0.9rem 0.7rem; text-align: center; font-size: 0.74rem; color: var(--text-dim); line-height: 1.6;
  overflow: hidden;
}
.mock-dropzone-sm { padding: 0.65rem 0.7rem; font-size: 0.7rem; }
.mock-dz-icon { display: inline-block; width: 15px; height: 15px; margin-right: 0.3em; color: var(--text-dimmer); vertical-align: -0.2em; }
.mock-dz-link { color: var(--accent); font-weight: 600; }
/* Vocal1/Instrumentalは「読み込み済み」の完成イメージとして、ファイル名
   チップを常時表示する（実際の操作を再現するアニメーションは行わない）。 */
.mock-file-chip {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -10%);
  background: var(--card-bg-raised); border: 1px solid var(--accent); color: var(--text);
  font-size: 0.74rem; font-weight: 600; padding: 0.3rem 0.7rem; border-radius: 999px; white-space: nowrap;
}

/* AI MIX開始: 実UIと同じ168円形+放射状グロー。常時ごくゆっくり呼吸する
   静かな明滅のみ（「処理中」の激しいパルスではなく環境演出）。 */
.mock-mix-circle {
  position: relative; z-index: 1; width: 168px; height: 168px; border-radius: 50%; border: none; cursor: pointer; font-family: inherit;
  background: radial-gradient(circle at 50% 35%, rgba(79,157,255,0.28), rgba(20,23,33,0.95) 72%);
  color: var(--text); display: flex; flex-direction: column; align-items: center; justify-content: center;
  animation: demo-mix-breathe 6s ease-in-out infinite;
}
.mmc-icon { color: var(--accent); margin-bottom: 0.2rem; }
.mmc-icon svg { width: 24px; height: 24px; }
.mmc-title { font-size: 1.08rem; font-weight: 800; margin: 0.05rem 0; }
.mmc-sub { font-size: 0.64rem; color: var(--text-dim); }
@keyframes demo-mix-breathe {
  0%, 100% { box-shadow: 0 0 0 1.5px rgba(79,157,255,0.4), 0 0 22px var(--accent-glow); }
  50% { box-shadow: 0 0 0 1.5px rgba(79,157,255,0.6), 0 0 34px var(--accent-glow); }
}
.mock-mix-hint { position: relative; font-size: 0.76rem; color: var(--text-dim); max-width: 220px; z-index: 1; }

.demo-center-canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.7; pointer-events: none; }
/* 中央の同心円リングは常時、ごくゆっくり呼吸するように明滅する
   （以前のファイル投入/MIX開始/完了に応じたstate切り替えは廃止）。 */
.mock-mix-rings {
  position: absolute; left: 50%; top: 42%; width: 0; height: 0; pointer-events: none;
  animation: demo-rings-breathe 5.5s ease-in-out infinite;
}
@keyframes demo-rings-breathe {
  0%, 100% { filter: brightness(1); opacity: 0.75; }
  50% { filter: brightness(1.35); opacity: 1; }
}
.mock-mix-rings span {
  position: absolute; left: 0; top: 0; border: 1.5px solid rgba(79,157,255,0.3); border-radius: 50%;
  transform: translate(-50%, -50%); box-shadow: 0 0 22px rgba(79,157,255,0.18);
}
.mock-mix-rings span:nth-child(1) { width: 280px; height: 280px; }
.mock-mix-rings span:nth-child(2) { width: 400px; height: 400px; border-color: rgba(124,108,255,0.2); }
.mock-mix-rings span:nth-child(3) { width: 520px; height: 520px; border-color: rgba(167,139,250,0.14); }

.mock-status-idle { font-size: 0.82rem; color: var(--text-dim); line-height: 1.6; margin: 0; }
.mock-status-idle.is-hidden { display: none; }
.mock-status-active { display: none; }
.mock-status-active.is-active { display: block; }

.mock-status-pill {
  display: inline-flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; font-weight: 600;
  padding: 0.4rem 0.85rem; border-radius: 999px; background: var(--card-bg-soft); color: var(--text-dim);
  border: 1px solid var(--border-soft); margin-bottom: 0.9rem;
}
.mock-progress-bar { height: 8px; border-radius: 999px; background: var(--card-bg-soft); overflow: hidden; }
.mock-progress-fill { height: 100%; width: 0%; border-radius: 999px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.mock-progress-row { display: flex; justify-content: space-between; margin-top: 0.5rem; font-size: 0.78rem; color: var(--text-dim); }

.mock-status-filemeta { font-size: 0.72rem; color: var(--text-dimmer); margin-top: 0.7rem; }

/* 完了時: 長さ/ラウドネス表示 */
.mock-status-grid {
  display: flex; gap: 1.2rem; margin-top: 0.8rem; opacity: 0; transition: opacity 0.4s;
}
.mock-status-grid.is-active { opacity: 1; }
.mock-status-grid div { font-size: 0.7rem; color: var(--text-dimmer); }
.mock-status-grid div b { display: block; font-size: 0.92rem; color: var(--text); font-weight: 700; margin-top: 0.1rem; }

/* AI解析結果カード: 待機状態⇔結果表示をJSで切替 */
.mock-insights-idle {
  display: flex; align-items: center; justify-content: space-between; gap: 0.8rem;
  font-size: 0.82rem; color: var(--text-dim); line-height: 1.6;
}
.mock-insights-idle.is-hidden { display: none; }
.mock-insights-idle-icon { width: 32px; height: 32px; color: var(--text-dimmer); flex-shrink: 0; }
.mock-insights-active { display: none; }
.mock-insights-active.is-active { display: block; }
.mock-insight-item {
  display: flex; gap: 0.6rem; margin-bottom: 0.75rem;
  opacity: 0; transform: translateX(-6px); transition: opacity 0.5s, transform 0.5s;
}
/* AI解析結果は3項目が順番に点灯する（is-activeが付いた瞬間からstagger） */
.mock-insights-active.is-active .mock-insight-item { opacity: 1; transform: translateX(0); }
.mock-insights-active.is-active .mock-insight-item:nth-child(1) { transition-delay: 0.1s; }
.mock-insights-active.is-active .mock-insight-item:nth-child(2) { transition-delay: 0.3s; }
.mock-insights-active.is-active .mock-insight-item:nth-child(3) { transition-delay: 0.5s; }
.mock-insight-item:last-child { margin-bottom: 0; }
.mock-insight-icon {
  width: 26px; height: 26px; border-radius: 50%; background: var(--accent-glow-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.mock-insight-icon svg { width: 14px; height: 14px; }
.mock-insight-icon-purple { background: rgba(167,139,250,0.18); color: var(--purple); }
.mock-insight-title { font-size: 0.78rem; font-weight: 700; }
.mock-insight-sub { font-size: 0.72rem; color: var(--text-dim); margin-top: 0.1rem; }

.demo-shot-slot { margin-top: 2rem; }

/* Higgsfield生成のループ動画を差し込む枠（実UIデモ用/オリジナル対応セクション用で共用）。
   aspect-ratioで枠自体の比率を動画の生成比率に合わせ、object-fit:coverで
   はみ出しなく自然に収める。reduced-motion/モバイル/save-dataではJSが
   is-posterを付与し、静止画へ切り替わる（動画データは読み込まれない）。 */
.loop-video-frame {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border-soft); background: var(--card-bg-soft);
}
.loop-video-frame video, .loop-video-frame img {
  display: block; width: 100%; height: 100%; object-fit: cover;
}
.loop-video-frame img { display: none; }
.loop-video-frame.is-poster video { display: none; }
.loop-video-frame.is-poster img { display: block; }
.loop-video-frame::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  box-shadow: inset 0 0 44px rgba(5,6,10,0.4);
}
.demo-video-frame { aspect-ratio: 21 / 9; }
.original-video-frame { aspect-ratio: 4 / 3; }

/* Video B(original-shot)は1本の波形が指定色(青紫)から外れ、クリーム/金系で
   生成された。Hero動画の時と同じくCSSの色調補正のみで対応し、再生成はしない。 */
.original-video-tint {
  position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(120deg, #3b6fff 0%, #7c6cff 55%, #a78bfa 100%);
  mix-blend-mode: color; opacity: 0.6;
}

/* 動画だけでは何を表しているか伝わりにくいため、下部に短い見出し+補足を
   重ねる。動画の世界観を壊さないよう、下端だけ暗くするグラデーションを
   敷き、文字は控えめなサイズに留める。コンテナ自体はフェードさせず（既に
   .loop-video-frame親がdata-revealで一度だけ浮かび上がるため二重にしない）、
   中の.loop-video-caption-itemだけをinitVideoCaptions()のIntersectionObserver
   でopacity/translateY/blurの解除アニメーションさせる（画面内に入ったら
   1回だけ発火、以降は安定・再アニメーションしない）。 */
.loop-video-caption {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 4;
  padding: 1.5rem 1.7rem 1.2rem;
  background: linear-gradient(to top, rgba(5,6,10,0.85) 0%, rgba(5,6,10,0.5) 55%, transparent 100%);
}
.loop-video-caption-title { margin: 0 0 0.3rem; font-size: 1.05rem; font-weight: 700; color: #fff; letter-spacing: 0.01em; position: relative; }
.loop-video-caption-sub { margin: 0; font-size: 0.82rem; color: rgba(224,228,240,0.82); line-height: 1.5; max-width: 30em; }
.loop-video-caption-title-accent {
  background: linear-gradient(135deg, var(--accent), var(--purple));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
/* Video B側は枠が小さいため、本文の「歌ってみた専用ではありません」見出し
   と同じ見え方にならないよう一回り小さく・グラデーション文字にして区別する。 */
.loop-video-caption-compact { padding: 1.1rem 1.2rem 0.95rem; }

.loop-video-caption-item {
  opacity: 0; transform: translateY(14px); filter: blur(3px);
  transition: opacity 0.85s cubic-bezier(.22,1,.36,1), transform 0.85s cubic-bezier(.22,1,.36,1), filter 0.85s cubic-bezier(.22,1,.36,1);
}
.loop-video-caption.is-visible .loop-video-caption-item { opacity: 1; transform: translateY(0); filter: blur(0); }

/* 見出し出現時だけ、下に淡いグロー付きの線が一瞬だけ左から右へ伸びて消える
   （動画Aのみ。常時ループはしない＝1回きりのanimation-iteration-count） */
.loop-video-caption-title-glow::after {
  content: ""; position: absolute; left: 0; bottom: -5px; height: 1px; width: 0; opacity: 0;
  background: linear-gradient(90deg, var(--accent), var(--purple));
}
.loop-video-caption.is-visible .loop-video-caption-title-glow::after {
  animation: lvc-underline 1.3s cubic-bezier(.22,1,.36,1) 0.55s 1 forwards;
}
@keyframes lvc-underline {
  0% { width: 0; opacity: 0; }
  35% { opacity: 0.85; }
  100% { width: 100%; opacity: 0; }
}

/* 動画Bの用途ラベル（オリジナル曲/Synthesizer V/デモ・仮歌）。補足文の
   下にごく小さく並べ、順番にやさしく現れた後は静止する。 */
.loop-video-caption-tags { list-style: none; margin: 0.55rem 0 0; padding: 0; display: flex; gap: 0.4rem; flex-wrap: wrap; }
.loop-video-caption-tags li {
  font-size: 0.64rem; font-weight: 600; color: rgba(224,228,240,0.85);
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.14);
  border-radius: 999px; padding: 0.2rem 0.6rem;
}
.loop-video-caption-compact .loop-video-caption-title { font-size: 0.92rem; }
.loop-video-caption-compact .loop-video-caption-sub { font-size: 0.72rem; }

/* ---------- 3-b. かんたん調整 / 詳細設定 / 最終出力（ピン解除後の続き） ---------- */
.demo-followup { display: grid; gap: 1.6rem; margin-top: 2.4rem; }

.mock-easy-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; margin-bottom: 1.4rem; flex-wrap: wrap; }
.mock-easy-desc { color: var(--text-dim); font-size: 0.82rem; line-height: 1.7; margin: 0.3rem 0 0; max-width: 640px; }
.mock-reset-btn {
  display: inline-flex; align-items: center; gap: 0.4rem; background: var(--card-bg-soft); border: 1px solid var(--border);
  color: var(--text-dim); font-family: inherit; font-size: 0.76rem; font-weight: 600; padding: 0.45rem 0.85rem;
  border-radius: 999px; cursor: pointer; white-space: nowrap;
}
.mock-reset-btn svg { width: 13px; height: 13px; }

.mock-subtitle { font-size: 0.82rem; font-weight: 700; color: var(--text-dim); margin: 1.5rem 0 0.9rem; }
.mock-subtitle:first-of-type { margin-top: 0; }
/* 「実際の音源に今この値を使っている」という誤解を避けるための小さな注記 */
.mock-demo-badge {
  display: inline-block; margin-left: 0.6em; font-size: 0.62rem; font-weight: 600; letter-spacing: 0.03em;
  color: var(--text-dimmer); background: var(--card-bg-soft); border: 1px solid var(--border-soft);
  border-radius: 999px; padding: 0.15rem 0.55rem; vertical-align: middle;
}

.mock-knob-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.8rem; }
.mock-knob-grid-3 { grid-template-columns: repeat(3, 1fr); max-width: 480px; }
.mock-knob-card {
  display: flex; flex-direction: column; align-items: center; gap: 0.55rem; text-align: center;
  background: var(--card-bg-soft); border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 1rem 0.6rem;
}
.mock-knob-dial { position: relative; width: 84px; height: 84px; }
.mock-knob-dial svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.mock-knob-dial .mkd-trim-track { fill: none; stroke: var(--border); stroke-width: 6; }
.mock-knob-dial .mkd-trim-fill {
  fill: none; stroke: var(--purple); stroke-width: 6; stroke-linecap: round;
  stroke-dasharray: 364.4; stroke-dashoffset: 182.2; filter: drop-shadow(0 0 4px var(--purple-glow));
}
.mock-knob-dial .mkd-gain-track { fill: none; stroke: var(--border); stroke-width: 10; }
.mock-knob-dial .mkd-gain-fill {
  fill: none; stroke: var(--accent); stroke-width: 10; stroke-linecap: round;
  stroke-dasharray: 289.0; stroke-dashoffset: 144.5; filter: drop-shadow(0 0 5px var(--accent-glow));
}
.mkd-value { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 0.92rem; font-weight: 800; }
.mkd-label { font-size: 0.68rem; color: var(--text-dim); line-height: 1.4; }

.mock-wide-slider { margin-top: 1.3rem; }
.mock-wide-slider-head { display: flex; justify-content: space-between; font-size: 0.85rem; font-weight: 700; margin-bottom: 0.6rem; }
.mock-wide-slider-track { position: relative; height: 6px; border-radius: 999px; background: var(--card-bg-soft); border: 1px solid var(--border-soft); }
.mock-wide-slider-tick { position: absolute; left: 50%; top: -3px; width: 2px; height: 12px; background: var(--border); transform: translateX(-50%); }
.mock-wide-slider-thumb {
  position: absolute; top: 50%; width: 14px; height: 14px; border-radius: 50%; background: var(--accent);
  transform: translate(-50%, -50%); box-shadow: 0 0 8px var(--accent-glow);
}

.mock-tone-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.mock-tone-card { background: var(--card-bg-soft); border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 0.9rem 1rem; }
.mock-tone-head { display: flex; justify-content: space-between; font-size: 0.8rem; font-weight: 700; margin-bottom: 0.8rem; }
.mock-tone-head small { color: var(--text-dimmer); font-weight: 500; margin-left: 0.2em; }

/* 詳細設定（一瞬見せる） */
.mock-advanced-head { display: flex; align-items: center; justify-content: space-between; gap: 0.8rem; }
.mock-advanced-left { display: flex; align-items: center; gap: 0.7rem; }
.mock-advanced-left > svg { width: 18px; height: 18px; color: var(--text-dim); flex-shrink: 0; }
.mock-advanced-title { font-weight: 700; font-size: 0.92rem; }
.mock-advanced-sub { font-size: 0.72rem; color: var(--text-dimmer); margin-top: 0.15rem; }
.mock-advanced-chev { width: 16px; height: 16px; color: var(--text-dim); transform: rotate(180deg); flex-shrink: 0; }
.mock-advanced-body { margin-top: 1.2rem; }
.mock-track-toggle { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.mock-track-toggle span {
  background: var(--card-bg-soft); border: 1px solid var(--border); color: var(--text-dim);
  border-radius: 999px; padding: 0.35rem 0.9rem; font-size: 0.76rem; font-weight: 600;
}
.mock-track-toggle span.is-active { background: var(--accent-glow-soft); border-color: var(--accent); color: var(--accent); }
.mock-module-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.1rem; }
.mock-module-btn {
  background: var(--card-bg-soft); border: 1px solid var(--border-soft); border-radius: var(--radius-sm);
  padding: 0.4rem 0.7rem; font-size: 0.68rem; color: var(--text-dim); white-space: nowrap;
}
.mock-module-btn.is-active { border-color: var(--accent); color: var(--text); background: var(--accent-glow-soft); }
.mock-param-panel { border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 0.9rem 1.1rem; background: var(--card-bg-soft); }
.mock-param-title { font-size: 0.85rem; color: var(--accent); margin-bottom: 0.6rem; font-weight: 700; }
.mock-param-field { display: flex; justify-content: space-between; align-items: center; font-size: 0.8rem; color: var(--text-dim); margin-bottom: 0.4rem; }
.mock-param-check { color: var(--accent); font-weight: 800; }
.mock-param-value { color: var(--text); font-variant-numeric: tabular-nums; }
.mock-advanced-link { margin-top: 0.9rem; font-size: 0.78rem; color: var(--text-dim); }

/* 最終出力 */
.mock-final-notice {
  display: flex; align-items: center; gap: 0.6rem; background: rgba(245,166,35,0.12); border: 1px solid rgba(245,166,35,0.4);
  color: #f5c26b; border-radius: var(--radius); padding: 0.8rem 1.1rem; font-size: 0.82rem; margin-bottom: 1.1rem; line-height: 1.6;
}
.mock-final-notice svg { width: 18px; height: 18px; flex-shrink: 0; }
.mock-final-buttons { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.2fr; gap: 0.8rem; }
.mock-final-btn {
  display: flex; align-items: center; gap: 0.6rem; padding: 0.85rem 1rem; border-radius: var(--radius);
  background: var(--card-bg); border: 1px solid var(--border-soft); color: var(--text); font-family: inherit; cursor: pointer;
}
.mock-final-btn svg { width: 18px; height: 18px; color: var(--text-dim); flex-shrink: 0; }
.mock-final-btn span { display: flex; flex-direction: column; text-align: left; }
.mock-final-btn b { font-size: 0.82rem; font-weight: 700; }
.mock-final-btn small { font-size: 0.66rem; color: var(--text-dimmer); }
.mock-final-btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; box-shadow: 0 8px 22px var(--accent-glow);
}
.mock-final-btn-primary svg, .mock-final-btn-primary small { color: rgba(255,255,255,0.85); }
.mock-final-btn-upsell { border-color: rgba(167,139,250,0.4); }
.mock-final-btn-upsell svg { color: var(--purple); }

/* ==========================================================================
   4. AI MIXINGの中身
   ========================================================================== */
.dsp { position: relative; overflow: hidden; }
.dsp::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 160px; z-index: 0; pointer-events: none;
  background: linear-gradient(180deg, rgba(79,157,255,0.05), transparent);
}
.dsp-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; width: 100%; height: 100%; opacity: 0.7; }
.dsp-bg-curve {
  fill: none; stroke: #4f9dff; stroke-width: 2; opacity: 0.6;
  filter: drop-shadow(0 0 5px rgba(79,157,255,0.4));
  transition: opacity 0.4s, transform 0.4s; transform-origin: center;
}
.dsp-bg-trail {
  fill: none; stroke: #4f9dff; stroke-width: 2; opacity: 0; transform: translateX(-26px);
  transition: opacity 0.4s, transform 0.4s; transform-origin: center;
}
.dsp-bg-arc { fill: none; stroke: #a78bfa; stroke-width: 1.6; opacity: 0.4; transform-origin: 600px 110px; transition: transform 0.5s, opacity 0.5s; }
.dsp-bg-balance {
  fill: #4f9dff; opacity: 0; transition: opacity 0.4s, transform 0.5s;
  filter: drop-shadow(0 0 5px rgba(79,157,255,0.6));
}
/* AIMIXが実行中のDSPチェーンに合わせて、処理の意味が感覚的に伝わるよう
   背景がそれぞれ違う反応をする(initDspChainのdspPhaseForから制御)。
   本体UI(DSPチェーンの見た目)自体は変えず、背景のみで表現する。 */
.dsp-bg[data-phase="eq"] .dsp-bg-curve { transform: scaleY(1.5); opacity: 0.75; }
.dsp-bg[data-phase="deesser"] .dsp-bg-curve { transform: scaleY(1.1) translateX(60px); opacity: 0.45; }
.dsp-bg[data-phase="comp"] .dsp-bg-curve { transform: scaleY(0.55); opacity: 0.65; }
.dsp-bg[data-phase="comp"] .dsp-bg-arc { transform: scale(0.75); }
.dsp-bg[data-phase="sat"] .dsp-bg-curve { opacity: 0.8; stroke-width: 2.6; }
.dsp-bg[data-phase="reverb"] .dsp-bg-arc { transform: scale(1.9); opacity: 0.5; }
.dsp-bg[data-phase="delay"] .dsp-bg-trail { opacity: 0.35; transform: translateX(-14px); }
.dsp-bg[data-phase="delay"] .dsp-bg-curve { opacity: 0.7; }
.dsp-bg[data-phase="balance"] .dsp-bg-balance { opacity: 0.85; }
.dsp-bg[data-phase="balance"] .dsp-bg-balance-left { transform: translateX(60px); }
.dsp-bg[data-phase="balance"] .dsp-bg-balance-right { transform: translateX(-60px); }
.dsp-bg[data-phase="settle"] .dsp-bg-curve { transform: scaleY(0.9); opacity: 0.4; }
.dsp-bg[data-phase="settle"] .dsp-bg-arc { transform: scale(1); opacity: 0.28; }
.dsp .section-inner { position: relative; z-index: 1; }
/* 一般ユーザー向けに「技術名称の一覧」ではなく「用途ごとのカード」で見せる。
   以前はflex-wrapの.dsp-nodeに負のinset(-4px)のグロー装飾を付けており、
   行間gapが0だったため、折り返した最終行(ラウドネス)のグローが上の行に
   はみ出して重なる不具合があった。CSS Gridの通常のgap+box内で完結する
   border/background変化に変更し、はみ出しが起きない構造にした。 */
.dsp-category-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-bottom: 2.4rem;
}
.dsp-category-card {
  background: var(--card-bg); border: 1px solid var(--border-soft); border-radius: var(--radius-lg);
  padding: 1.4rem 1.3rem; transition: border-color 0.4s, background 0.4s, transform 0.4s;
}
.dsp-category-card.is-active {
  border-color: var(--accent); background: var(--card-bg-raised); transform: translateY(-3px);
  box-shadow: 0 10px 26px var(--accent-glow-soft);
}
.dsp-category-icon {
  display: flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-glow-soft), rgba(124,108,255,0.14)); color: var(--accent); margin-bottom: 0.9rem;
  transition: color 0.4s, background 0.4s;
}
.dsp-category-card.is-active .dsp-category-icon { color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.dsp-category-icon svg { width: 19px; height: 19px; }
.dsp-category-card h3 { margin: 0 0 0.5rem; font-size: 0.98rem; }
.dsp-category-card p { margin: 0 0 0.8rem; color: var(--text-dim); font-size: 0.85rem; line-height: 1.65; }
.dsp-category-tags { font-size: 0.7rem; color: var(--text-dimmer); }

.dsp-meter-row { display: flex; gap: 2rem; flex-wrap: wrap; }
.dsp-meter { flex: 1 1 160px; }
.dsp-meter span { display: block; margin-top: 0.5rem; font-size: 0.78rem; color: var(--text-dim); }
.dsp-meter-bar {
  height: 10px; border-radius: 999px; background: var(--card-bg-soft); overflow: hidden; position: relative;
}
.dsp-meter-bar::after {
  content: ""; position: absolute; inset: 0; width: 0%; border-radius: 999px;
  background: linear-gradient(90deg, var(--success), var(--accent));
}
.dsp-meter-bar.is-animating::after { width: var(--meter-val, 60%); transition: width 1.1s ease; }

/* ==========================================================================
   5. Before / After（強めに見せるセクションの一つ。左右の空気感の差が主役）
   ========================================================================== */
.before-after { position: relative; }
.before-after::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 160px; z-index: 0; pointer-events: none;
  background: linear-gradient(180deg, rgba(124,108,255,0.05), transparent);
}
.before-after .section-inner { position: relative; z-index: 1; }
.ba-card { background: var(--card-bg); border: 1px solid var(--border-soft); border-radius: var(--radius-lg); padding: 1.6rem; position: relative; }
.ba-row { display: grid; grid-template-columns: 1fr auto 1fr; gap: 1.2rem; align-items: start; }
/* Before/After自体は主役。背景は「空間が整った・広がった」という空気感の
   差だけを付ける（品質の優劣を露骨な色で決めつけない）。 */
.ba-col { min-width: 0; border-radius: var(--radius); padding: 0.6rem; transition: background 0.4s; position: relative; overflow: hidden; }
.ba-row .ba-col:first-child { background: rgba(255,255,255,0.006); }
.ba-row .ba-col:last-child { background: radial-gradient(ellipse at 50% 25%, rgba(124,108,255,0.1), transparent 72%), rgba(255,255,255,0.02); }
/* Afterだけ、粒子感をCSSのみ(Canvas追加なし)でわずかに足す */
.ba-col-particles { position: absolute; inset: 0; pointer-events: none; z-index: 0; }
.ba-col-particles span {
  position: absolute; width: 3px; height: 3px; border-radius: 50%; background: #a78bfa; opacity: 0;
  animation: ba-drift 6s ease-in-out infinite;
}
.ba-row .ba-col:first-child .ba-col-particles span { background: #6b87b8; animation-duration: 8s; }
@keyframes ba-drift { 0%,100% { opacity: 0; transform: translateY(0); } 50% { opacity: 0.5; transform: translateY(-10px); } }
.ba-col-head { display: flex; align-items: center; gap: 0.5rem; font-size: 0.86rem; font-weight: 700; margin-bottom: 0.7rem; flex-wrap: wrap; }
.ba-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--text-dimmer); flex-shrink: 0; }
.ba-dot-accent { width: 15px; height: 15px; background: none; color: var(--accent); }
.ba-dot-accent svg { width: 100%; height: 100%; }
.ba-controls { display: inline-flex; align-items: center; gap: 0.35rem; margin-left: auto; }
.ba-icon-btn {
  display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; border-radius: 50%;
  background: var(--card-bg-soft); border: 1px solid var(--border-soft); color: var(--text-dim); cursor: pointer;
}
.ba-icon-btn svg { width: 12px; height: 12px; }
.ba-icon-btn-sm { width: 22px; height: 22px; }
.ba-icon-btn-sm svg { width: 10px; height: 10px; }
.ba-time { font-size: 0.68rem; color: var(--text-dimmer); font-variant-numeric: tabular-nums; margin-left: 0.3rem; white-space: nowrap; }
.ba-wave-wrap { border: 1px solid var(--border-soft); border-radius: var(--radius); overflow: hidden; background: var(--bg-bot); }
.ba-canvas { width: 100%; height: 120px; display: block; }
.ba-scrub { width: 100%; margin-top: 0.5rem; accent-color: var(--accent); }
.ba-arrow { display: flex; align-items: center; justify-content: center; color: var(--accent); font-size: 1.6rem; font-weight: 700; padding-top: 2.6rem; }
.ba-note { font-size: 0.78rem; color: var(--text-dimmer); margin: 1.2rem 0 0; line-height: 1.7; }
.ba-segment-hint {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  margin-top: 0.9rem; padding-top: 0.9rem; border-top: 1px solid var(--border-soft);
}
.ba-segment-hint-text { font-size: 0.76rem; color: var(--text-dim); max-width: 460px; line-height: 1.6; }
.ba-segment-hint-pills { display: flex; gap: 0.5rem; flex-shrink: 0; }
.ba-segment-pill {
  font-size: 0.7rem; font-weight: 600; color: var(--text-dim); background: var(--card-bg-soft);
  border: 1px solid var(--border-soft); border-radius: 999px; padding: 0.35rem 0.8rem; white-space: nowrap;
}
.ba-info-note {
  display: flex; gap: 0.5rem; align-items: flex-start; margin-top: 0.9rem; font-size: 0.76rem; color: var(--text-dim);
  background: var(--accent-glow-soft); border: 1px solid rgba(79,157,255,0.3); border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem; line-height: 1.6;
}
.ba-info-note svg { width: 15px; height: 15px; color: var(--accent); flex-shrink: 0; margin-top: 0.1em; }

/* ==========================================================================
   6. オリジナル楽曲対応（Web実装が第一候補。物足りなければHiggsfield 1本を提案）
   ========================================================================== */
/* 主役演出: 複数の音の層(Instrumental)が周囲に広がり、中央のVocalラインへ
   まとまっていく。強めに見せるセクションの一つなので前回よりopacity/本数/
   glowを増やした。実ブラウザ確認後、まだ弱い場合のみHiggsfield 1本を検討。 */
.original { position: relative; overflow: hidden; }
.original::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 160px; z-index: 0; pointer-events: none;
  background: linear-gradient(180deg, rgba(124,108,255,0.06), transparent);
}
.original-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.original-bg-layer {
  position: absolute; left: -10%; right: -10%; height: 1.5px; opacity: 0.4;
  background: linear-gradient(90deg, transparent, #9b7bff 40%, #4f9dff 60%, transparent);
  box-shadow: 0 0 12px rgba(124,108,255,0.3);
}
.original-bg-layer-1 { top: 14%; transform: translateX(-8%); }
.original-bg-layer-2 { top: 32%; transform: translateX(6%); opacity: 0.3; }
.original-bg-layer-3 { top: 68%; transform: translateX(-5%); opacity: 0.3; }
.original-bg-layer-4 { top: 86%; transform: translateX(7%); }
.original-bg-center {
  position: absolute; left: 50%; top: 10%; bottom: 10%; width: 2px; transform: translateX(-50%);
  background: linear-gradient(180deg, transparent, #4f9dff, #9b7bff, transparent);
  opacity: 0.55; box-shadow: 0 0 24px rgba(79,157,255,0.4);
}
.original-bg-particles span {
  position: absolute; width: 3px; height: 3px; border-radius: 50%; background: #a78bfa; opacity: 0;
  animation: ba-drift 7s ease-in-out infinite;
}
.original .section-inner { position: relative; z-index: 1; }
.original-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 3rem; align-items: center; }
.original .section-lead { margin-bottom: 1.4rem; }

/* ==========================================================================
   7. 向いている人／コツ（感情寄りの柔らかい背景。可読性を優先し動きは最小限）
   ========================================================================== */
.audience { position: relative; overflow: hidden; }
.audience-bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 55% 45% at 15% 10%, rgba(79,157,255,0.07), transparent 70%),
    radial-gradient(ellipse 55% 45% at 85% 90%, rgba(167,139,250,0.07), transparent 70%);
}
.audience .section-inner { position: relative; z-index: 1; }
.audience-card { position: relative; }
.audience-card::before {
  content: ""; position: absolute; inset: -1px; border-radius: var(--radius-lg); z-index: -1;
  background: radial-gradient(ellipse at 30% 0%, rgba(79,157,255,0.08), transparent 60%);
}
.audience .section-lead { max-width: 760px; }
.audience-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; margin-bottom: 1.6rem; }
.audience-card { background: var(--card-bg); border: 1px solid var(--border-soft); border-radius: var(--radius-lg); padding: 1.6rem; }
.audience-card-icon {
  display: flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-glow-soft), rgba(124,108,255,0.14)); color: var(--accent); margin-bottom: 1rem;
}
.audience-card-icon svg { width: 19px; height: 19px; }
.audience-card h3 { margin: 0 0 1rem; font-size: 0.98rem; }
.audience-tips {
  background: var(--card-bg-soft); border: 1px solid var(--border-soft); border-radius: var(--radius-lg);
  padding: 1.6rem; margin-bottom: 2rem;
}
.audience-tips h3 { margin: 0 0 1rem; font-size: 0.98rem; }
.audience-position { color: var(--text-dim); font-size: 0.98rem; line-height: 1.85; border-left: 2px solid var(--accent); padding-left: 1.1rem; }

/* ==========================================================================
   8. Pricing（「選ぶ場所」なので背景はほぼ静止。Standardだけ静かに呼吸するグロー）
   ========================================================================== */
.pricing { position: relative; }
.pricing::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: radial-gradient(ellipse 40% 60% at 50% 0%, rgba(79,157,255,0.04), transparent 70%);
}
.pricing .section-inner { position: relative; z-index: 1; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.3rem; }
.price-card {
  position: relative; background: var(--card-bg); border: 1px solid var(--border-soft); border-radius: var(--radius-lg);
  padding: 1.8rem 1.5rem; display: flex; flex-direction: column;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s, background 0.3s;
}
/* カード全体をクリック可能にする（AIMIX本体の該当プラン選択画面へ遷移）。
   .price-card-linkはinset:0の透明なリンクで、hover/focusはカード全体に
   波及させる（:hoverは子要素経由でも親に伝播するため追加JS不要）。 */
.price-card:hover, .price-card:focus-within {
  transform: translateY(-4px); border-color: var(--border);
  box-shadow: 0 14px 36px rgba(79,157,255,0.18), 0 0 0 1px rgba(255,255,255,0.05);
  background: var(--card-bg-soft);
}
.price-card-link {
  position: absolute; inset: 0; border-radius: inherit; z-index: 3;
  cursor: pointer; -webkit-tap-highlight-color: transparent;
}
.price-card-link:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 3px;
}
.price-card-recommended { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), 0 16px 40px var(--accent-glow-soft); }
.price-card-recommended::after {
  content: ""; position: absolute; inset: -18px; z-index: -1; border-radius: calc(var(--radius-lg) + 18px);
  background: radial-gradient(ellipse at 50% 40%, var(--accent-glow-soft), transparent 70%);
  animation: price-breathe 5s ease-in-out infinite;
}
@keyframes price-breathe { 0%,100% { opacity: 0.55; } 50% { opacity: 1; } }
.price-badge {
  position: absolute; top: -12px; left: 1.5rem; background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-size: 0.72rem; font-weight: 700; padding: 0.3rem 0.8rem; border-radius: 999px;
}
.price-name { font-size: 0.85rem; font-weight: 700; color: var(--text-dim); }
.price-value { font-size: 2rem; font-weight: 800; margin: 0.3rem 0 0.6rem; }
.price-value small { font-size: 0.9rem; font-weight: 600; color: var(--text-dim); }
.price-desc { color: var(--text-dim); font-size: 0.86rem; margin: 0 0 1.2rem; }
.price-features { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.55rem; }
.price-features li {
  font-size: 0.85rem; color: var(--text-dim); padding-left: 1.3rem; position: relative;
}
.price-features li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* ==========================================================================
   9. FAQ（ほぼ静止。可読性優先で低コントラストのリングのみ）
   ========================================================================== */
.faq { position: relative; }
.faq::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: radial-gradient(circle 340px at 88% 15%, rgba(124,108,255,0.05), transparent 70%);
}
.faq .section-inner { position: relative; z-index: 1; }
.faq-list { display: grid; gap: 0.8rem; }
.faq-item { border: 1px solid var(--border-soft); border-radius: var(--radius); background: var(--card-bg); overflow: hidden; }
.faq-q {
  width: 100%; text-align: left; background: none; border: none; color: var(--text); font-family: inherit;
  font-size: 0.95rem; font-weight: 700; padding: 1.1rem 1.3rem; cursor: pointer; position: relative; padding-right: 2.6rem;
}
.faq-q::after {
  content: "+"; position: absolute; right: 1.3rem; top: 50%; transform: translateY(-50%); color: var(--accent);
  font-size: 1.3rem; font-weight: 400; transition: transform 0.3s;
}
.faq-item.is-open .faq-q::after { transform: translateY(-50%) rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-item.is-open .faq-a { max-height: 240px; }
.faq-a p { margin: 0 1.3rem 1.2rem; color: var(--text-dim); font-size: 0.88rem; line-height: 1.75; }

/* ==========================================================================
   9.5 Nekoneへの導線（AIMIXは単体で完結。目立たせすぎない補助セクション）
   ========================================================================== */
.nekone-link {
  padding: 3.5rem 0; position: relative;
  background: linear-gradient(180deg, rgba(79,157,255,0.05) 0%, rgba(124,108,255,0.06) 55%, rgba(167,139,250,0.07) 100%);
}
.nekone-link .section-eyebrow { color: var(--purple); }
.nekone-link-title { font-size: clamp(1.15rem, 2.2vw, 1.5rem); font-weight: 700; margin: 0 0 0.8rem; line-height: 1.5; }
.nekone-link .section-lead { margin-bottom: 1.8rem; }
.nekone-link-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.9rem; }
.nekone-link-item {
  display: flex; align-items: center; gap: 0.7rem; padding: 0.95rem 1.1rem; border-radius: var(--radius);
  background: rgba(255,255,255,0.02); border: 1px solid var(--border-soft); transition: border-color 0.2s, background 0.2s;
}
.nekone-link-item:hover { border-color: rgba(167,139,250,0.4); background: var(--purple-glow); }
.nekone-link-icon { width: 30px; height: 30px; border-radius: 9px; background: var(--purple-glow); color: var(--purple); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.nekone-link-icon svg { width: 15px; height: 15px; }
.nekone-link-item span:last-child { display: flex; flex-direction: column; gap: 0.15rem; }
.nekone-link-item b { font-size: 0.86rem; font-weight: 700; }
.nekone-link-item small { font-size: 0.72rem; color: var(--text-dim); }

/* ==========================================================================
   10. Final CTA
   ========================================================================== */
.final-cta { text-align: center; padding: 7rem 0 8rem; overflow: hidden; position: relative; }
.final-cta::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 160px; z-index: 0; pointer-events: none;
  background: linear-gradient(180deg, rgba(167,139,250,0.07), transparent);
}
.cta-canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.85; }
/* Heroの世界観の再登場（動画の再生はしない、円形リング+波形をWebで再現）。
   LP最後の見せ場なので強めのglowで締める。 */
.cta-rings { position: absolute; left: 50%; top: 50%; width: 0; height: 0; pointer-events: none; z-index: 0; }
.cta-rings span {
  position: absolute; left: 0; top: 0; border: 1.5px solid rgba(79,157,255,0.28); border-radius: 50%;
  transform: translate(-50%, -50%); box-shadow: 0 0 26px rgba(79,157,255,0.2);
}
.cta-rings span:nth-child(1) { width: 220px; height: 220px; }
.cta-rings span:nth-child(2) { width: 360px; height: 360px; border-color: rgba(124,108,255,0.2); }
.cta-rings span:nth-child(3) { width: 520px; height: 520px; border-color: rgba(167,139,250,0.14); }
.final-cta-inner { position: relative; z-index: 1; }
.final-cta .section-lead { margin: 0 auto 2.2rem; }

/* ---------- Footer ---------- */
.lp-footer { border-top: 1px solid var(--border-soft); padding: 2rem 0; }
.lp-footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.8rem; font-size: 0.8rem; color: var(--text-dimmer); }
.lp-footer-nav { display: flex; gap: 1.2rem; }
.lp-footer-nav a:hover { color: var(--text-dim); }

/* ==========================================================================
   レスポンシブ（本番アプリの主ブレークポイント900pxに合わせる）
   ========================================================================== */
@media (max-width: 900px) {
  .section { padding: 4rem 0; }
  .steps-grid { grid-template-columns: 1fr; }
  .original-grid { grid-template-columns: 1fr; gap: 2rem; }
  .audience-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .nekone-link-row { grid-template-columns: 1fr; }
  .dsp-category-grid { grid-template-columns: repeat(2, 1fr); }
  .ba-segment-hint { flex-direction: column; align-items: flex-start; }
  .lp-nav { gap: 0.8rem; }
  .lp-nav a:not(.lp-nav-cta) { display: none; }
  .hero-value-cards { grid-template-columns: 1fr; max-width: 420px; }

  /* 実UIデモ: UI本体は元々静止表示なので、モバイルは縦積みにするだけでよい */
  .demo-stage-inner { padding: 2rem 20px; flex-direction: column; }
  .demo-col { max-width: 480px; width: 100%; min-height: 0; }
  .demo-bg-line, .demo-bg-ripple { display: none; }
  .mock-status-card::before, .mock-insights-card::before { display: none; }

  .mock-knob-grid { grid-template-columns: repeat(3, 1fr); }
  .mock-tone-grid { grid-template-columns: 1fr; }
  .mock-final-buttons { grid-template-columns: 1fr 1fr; }

  .ba-row { grid-template-columns: 1fr; }
  .ba-arrow { display: none; }

  /* モバイルは「主役演出だけ」残し、粒子・リング数・重ねグローを削減する。
     GSAP scrub自体はJS側のmatchMediaで最初から作らない（steps/original）。 */
  .mock-mix-rings span:nth-child(3) { display: none; }
  .cta-rings span:nth-child(3) { display: none; }
  .ba-col-particles span:nth-child(n+4) { display: none; }
  .original-bg-particles span:nth-child(n+3) { display: none; }
  .original-bg-layer-2, .original-bg-layer-4 { display: none; }
  .steps::before, .steps::after, .demo::before, .dsp::before, .before-after::before, .original::before, .final-cta::before { height: 60px; }

  .loop-video-caption { padding: 1.1rem 1.2rem 0.9rem; }
  .loop-video-caption-title { font-size: 0.9rem; }
  .loop-video-caption-sub { font-size: 0.72rem; }
  .loop-video-caption-compact { padding: 0.85rem 0.95rem 0.75rem; }
  .loop-video-caption-compact .loop-video-caption-title { font-size: 0.82rem; }
  .loop-video-caption-compact .loop-video-caption-sub { font-size: 0.68rem; }
  /* モバイルは見出し→補足の2段階で十分なため、用途ラベルの順次表示は省略する */
  .loop-video-caption-tags { display: none; }
}

@media (max-width: 700px) {
  .dsp-category-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .mock-knob-grid { grid-template-columns: repeat(2, 1fr); }
  .mock-final-buttons { grid-template-columns: 1fr; }
  .mock-easy-head { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .hero-scroll-cue span { animation: none; }
  .hero-video { display: none; }
  .hero-poster { display: block; }
  .hero-reveal-item { opacity: 1; transform: none; filter: none; transition: none; }
  .loop-video-caption-item { opacity: 1; transform: none; filter: none; transition: none; }
  .loop-video-caption-title-glow::after { animation: none; opacity: 0; }
  .price-card-recommended::after { animation: none; opacity: 0.6; }
  .mock-mix-rings { animation: none; opacity: 0.85; }
  .mock-mix-circle { animation: none; }
  .mock-status-card::before, .mock-insights-card::before { animation: none; opacity: 0; }
  .demo-bg-line { animation: none; opacity: 0.15; }
  .demo-bg-ripple { display: none; }
  .ba-col-particles span, .original-bg-particles span { animation: none; opacity: 0; }
  .mock-insight-item { transition: none; opacity: 1; transform: none; }
  .steps-bg-line, .original-bg-layer, .original-bg-center, .dsp-bg-curve, .dsp-bg-arc, .mock-mix-rings, .cta-rings { transition: none; }
}