/* ═══════════════════════════════════════════════════
   PLF LP build/css/sections.css  (S0 + S1 + S2/S3 clip)
   HEX直書き禁止
   HC_GOLD (S1): RECALL/.rw / recall-kicker / tagline em / progress-fill
   — S1 kinetic ゾーン全体が単一の gold 演出として機能する
═══════════════════════════════════════════════════ */

/* ── S0 HERO ──────────────────────────────────── */
.s0-hero {
  position: relative;
  width: 100%;
  height: 100svh;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.s0-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.s0-overlay {
  position: absolute;
  inset: 0;
  background: var(--hc-overlay-dark);
  z-index: 1;
}

.s0-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem;
  max-width: 900px;
}

.s0-kicker {
  font-size: var(--size-kicker);
  font-weight: 700;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--hc-text-dimmer);
  margin-bottom: 1.5rem;
}

.s0-h1 {
  font-size: var(--size-h1);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--hc-text);
  margin-bottom: 1.5rem;
}

.s0-ja {
  font-size: var(--size-body);
  color: var(--hc-text-dim);
  line-height: 1.8;
  margin-bottom: 3rem;
}

.scroll-hint-s0 {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.scroll-hint-s0 span {
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--hc-text-dimmer);
}

.scroll-arrow {
  display: block;
  width: 1.5px;
  height: 3rem;
  background: linear-gradient(to bottom, transparent, var(--hc-muted));
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
  50%       { opacity: 1;   transform: scaleY(1); }
}

/* ── S1 KINETIC ───────────────────────────────── */
.kinetic-wrap { position: relative; }

.kinetic-stage {
  width: 100%;
  height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background-color: var(--hc-dark);
}

.stage-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 100% 80% at 50% 110%, var(--hc-navy-bg) 0%, transparent 60%);
  pointer-events: none;
}

.phase {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.phase-search { opacity: 1; }

.search-chars {
  display: flex;
  align-items: baseline;
  line-height: 0.95;
  position: relative;
}

.sc {
  font-size: var(--size-hero);
  font-weight: 900;
  letter-spacing: -0.05em;
  color: var(--hc-text);
  display: inline-block;
  will-change: transform, opacity, filter;
}

.strikethrough {
  position: absolute;
  top: 50%;
  left: 0;
  width: 0%;
  height: clamp(3px, 0.5vw, 6px);
  background-color: var(--hc-text-dimmer);
  transform: translateY(-50%);
  pointer-events: none;
  will-change: width;
}

.phase-label {
  font-size: var(--size-kicker);
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--hc-text-dimmer);
  margin-top: clamp(1.5rem, 3vw, 2.5rem);
  opacity: 0;
  will-change: opacity, transform;
}

.recall-container {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.recall-kicker {
  font-size: var(--size-kicker);
  font-weight: 700;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--hc-gold);
  margin-bottom: clamp(0.8rem, 2vw, 1.5rem);
  opacity: 0;
  will-change: opacity, transform;
}

.recall-word {
  display: flex;
  align-items: baseline;
  gap: 0;
  line-height: 0.9;
}

.rw {
  font-size: var(--size-recall);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--hc-gold);
  display: inline-block;
  will-change: transform, opacity, filter;
  opacity: 0;
  text-shadow:
    0 0 clamp(20px,4vw,60px) rgba(200,155,60,0.25),
    0 0 clamp(4px,0.8vw,10px) rgba(200,155,60,0.15);
}

/* HC_GOLD 視覚①: tagline em のみ gold */
.phase-tagline {
  opacity: 0;
  padding: 0 clamp(1.5rem, 5vw, 6rem);
  text-align: center;
}

.tagline {
  font-size: var(--size-tagline);
  font-weight: 500;
  line-height: 1.8;
  color: var(--hc-text);
  margin-bottom: clamp(1.2rem, 2.5vw, 2rem);
  opacity: 0;
  will-change: opacity, transform;
}

.tagline em { font-style: normal; color: var(--hc-gold); }

.tagline-sub {
  font-size: var(--size-sub);
  color: var(--hc-text-dimmer);
  line-height: 1.9;
  max-width: 48ch;
  margin: 0 auto;
  opacity: 0;
  will-change: opacity, transform;
}

.progress-bar {
  position: absolute;
  bottom: clamp(1.5rem, 3vh, 2.5rem);
  left: 50%;
  transform: translateX(-50%);
  width: clamp(80px, 15vw, 160px);
  height: 1.5px;
  background-color: var(--hc-divider);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background-color: var(--hc-gold);
  will-change: width;
}

/* ── B2: S1 kinetic JP 対文 (gold不使用) ─────── */
.kinetic-jp {
  font-size: var(--size-sub);
  color: var(--hc-text-dim);
  letter-spacing: 0.08em;
  margin-top: clamp(0.8rem, 1.5vw, 1.2rem);
  opacity: 0;
  will-change: opacity, transform;
  pointer-events: none;
}
.kinetic-jp--recall {
  margin-top: clamp(1.8rem, 4vw, 3.2rem);
}

/* ── S2/S3 CLIP-SECTION (split layout) ────────── */
.s2-problem { background-color: var(--hc-dark); padding: 0; }
.s3-scan    { background-color: var(--hc-dark-mid); }

.clip-section {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 0;
}

/* nth-child(even) 廃止 → .clip-reverse クラスで通し番号制御 */
.clip-section.clip-reverse .clip-media { order: 2; }
.clip-section.clip-reverse .clip-text  { order: 1; }

.clip-media {
  position: relative;
  width: 100%;
  height: 100svh;
  overflow: hidden;
}

.clip-media video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.clip-poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: none;
}

.clip-text {
  padding: clamp(3rem, 6vw, 6rem) clamp(2rem, 5vw, 5rem);
  opacity: 0;
  transform: translateX(40px);
  will-change: opacity, transform;
}

.clip-section.clip-reverse .clip-text { transform: translateX(-40px); }

.clip-eyebrow {
  font-size: var(--size-kicker);
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--hc-teal);
  margin-bottom: 1rem;
}

.clip-h2 {
  font-size: var(--size-h2);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--hc-text);
  margin-bottom: 1.5rem;
}

.clip-body {
  font-size: var(--size-body);
  color: var(--hc-text-dim);
  line-height: 2;
}

/* ── モバイル: 縦積み ──────────────────────────── */
@media (max-width: 768px) {
  .clip-section {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  /* モバイル縦積み: clip-reverse でも order リセット */
  .clip-section.clip-reverse .clip-media { order: 0; }
  .clip-section.clip-reverse .clip-text  { order: 1; }
  .clip-media { height: 55vw; min-height: 220px; }
  .clip-text  { transform: translateY(30px); padding: 2.5rem 1.5rem; }
  .clip-section.clip-reverse .clip-text { transform: translateY(30px); }
}