/* ========== FV ========== */
.fv {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  isolation: isolate;
  transform: translateZ(0);
}

/* 動画背景 */
.fv__video-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.fv__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.fv__overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.45);
  border: 14px solid #B2B2A6;
}

/* ========== FV 入場アニメーション ========== */
@keyframes fv-title-in {
  0%   { opacity: 0; transform: translateY(18px); filter: blur(14px); }
  100% { opacity: 0.7; transform: translateY(0); filter: blur(0px); }
}

@keyframes fv-subtitle-in {
  0%   { opacity: 0; transform: translateY(16px); filter: blur(8px); }
  100% { opacity: 1; transform: translateY(0); filter: blur(0px); }
}

@keyframes fv-fade-up {
  0%   { opacity: 0; transform: translateY(14px); filter: blur(6px); }
  100% { opacity: 1; transform: translateY(0); filter: blur(0px); }
}

/* メインコピー */
.fv__content {
  position: absolute;
  z-index: 1;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: left;
}

.fv__title {
  font-family: var(--font-kozuka);
  font-size: 87px;
  font-weight: 500;
  color: var(--color-white);
  letter-spacing: 0;
  white-space: nowrap;
  mix-blend-mode: hard-light;
  text-shadow:
    0px 3px 6px rgba(0, 0, 0, 0.5),
    inset 0px 3px 6px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(30px) brightness(0.15);
  -webkit-backdrop-filter: blur(30px) brightness(0.15);
  opacity: 0;
  animation: fv-title-in 1.6s cubic-bezier(0.22, 1, 0.36, 1) 0.4s forwards;
}

.fv__subtitle {
  font-family: var(--font-sawarabi);
  font-size: 23px;
  font-weight: 500;
  color: var(--color-white);
  letter-spacing: 0;
  line-height: 30px;
  text-align: center;
  margin-top: 16px;
  opacity: 0;
  animation: fv-subtitle-in 1.4s cubic-bezier(0.22, 1, 0.36, 1) 1.1s forwards;
}

/* スクロールインジケーター */
.fv__scroll {
  position: absolute;
  z-index: 1;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0;
  animation: fv-fade-up 1.2s cubic-bezier(0.22, 1, 0.36, 1) 2.0s forwards;
}

.fv__scroll-text {
  font-family: var(--font-bunkyu-go);
  font-size: 12px;
  font-weight: 500;
  color: var(--color-white);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.fv__scroll-line {
  display: block;
  width: 1px;
  height: 40px;
  background-color: var(--color-white);
  animation: scroll-line 1.8s ease-in-out infinite;
  transform-origin: top;
}

@keyframes scroll-line {
  0%   { transform: scaleY(0); opacity: 1; }
  80%  { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(1); opacity: 0; }
}

/* コンセプトムービー */
.fv__concept-movie {
  display: none !important;

  position: absolute;
  z-index: 1;
  bottom: 60px;
  right: 20px;
  display: flex;
  align-items: center;
  background-color: rgba(15, 10, 5, 0.85);
  border: 1px solid var(--color-white);
  width: 490px;
  text-decoration: none;
  opacity: 0;
  animation: fv-fade-up 1.2s cubic-bezier(0.22, 1, 0.36, 1) 1.8s forwards;
  transition: opacity 0.2s;
}

.fv__concept-movie:hover {
  opacity: 0.8;
}

.fv__concept-thumb {
  width: 226px;
  height: 110px;
  flex-shrink: 0;
  overflow: hidden;
}

.fv__concept-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.fv__concept-text {
  flex: 1;
  padding: 0 10px;
  text-align: right;
}

.fv__concept-sub {
  font-family: var(--font-bunkyu-go);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-white);
  letter-spacing: 0.06em;
  line-height: 1.5;
}

.fv__concept-label {
  font-family: "Noto Serif JP", serif;
  font-size: 16px;
  font-weight: 700;
  color: #C8C1B3;
  letter-spacing: 0.15em;
  margin-top: 6px;
}

.fv__concept-arrow {
  font-size: 16px;
  line-height: 1;
  text-align: center;
  letter-spacing: 0;
  color: #FFFFFF;
  opacity: 1;
  flex-shrink: 0;
  align-self: center;
  background: none;
  margin-right: 15px;
  font-family: sans-serif;
  font-variant-emoji: text;
}

/* ========== Mobile ========== */
@media (max-width: 768px) {
  .fv__content {
    width: 90%;
    text-align: center;
    left: 50%;
    transform: translate(-50%, -50%);
  }

  .fv__title {
    font-size: 42px;
    line-height: 1.4;
    white-space: normal;
    text-align: center;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .fv__subtitle {
    font-size: 16px;
    line-height: 1.8;
    text-align: center;
  }

  /* スクロールインジケーター非表示 */
  .fv__scroll {
    display: none;
  }

  /* コンセプトムービーはSPで非表示 */
  .fv__concept-movie {
    display: none;
  }

  .fv__concept-thumb {
    width: 100px;
    height: 72px;
    flex-shrink: 0;
    overflow: hidden;
  }

  .fv__concept-sub {
    font-size: 13px;
  }

  .fv__concept-label {
    font-size: 14px;
  }
}