/* ==========================================================
   LUVIAL Brand Site  (BALMUDA-inspired minimal / premium)
   白基調 + チャコール + 淡いゴールドのアクセント
   ========================================================== */

:root {
  --color-text: #1f1f1f;
  --color-text-sub: #6b6b6b;
  --color-bg: #ffffff;
  --color-bg-soft: #f7f6f4;
  --color-charcoal: #16171a;
  --color-accent: #b39a68;      /* 淡いゴールド */
  --color-accent-soft: #e8e0d0;
  --color-line: #e5e2dc;
  --font-en: "Jost", sans-serif;
  --font-jp: "Noto Sans JP", sans-serif;
  --header-h: 64px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  font-family: var(--font-jp);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow { max-width: 760px; }
.pc-only { display: inline; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 100;
  transition: background .35s ease, border-color .35s ease;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}
/* ヒーロー上では透明ヘッダー(白ロゴ・白文字) */
.site-header.is-transparent {
  background: transparent;
  backdrop-filter: none;
  border-bottom-color: transparent;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header-logo { display: inline-flex; align-items: center; }
.header-logo img { width: 110px; height: auto; }
.logo-light { display: none; }
.site-header.is-transparent .logo-dark { display: none; }
.site-header.is-transparent .logo-light { display: block; }

.global-nav ul {
  display: flex;
  gap: 34px;
}
.global-nav a {
  font-size: 14px;
  letter-spacing: .06em;
  position: relative;
  padding: 6px 0;
  transition: color .3s;
}
.site-header.is-transparent .global-nav a { color: #fff; }
.global-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: currentColor;
  transition: width .3s ease;
}
.global-nav a:hover::after { width: 100%; }

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: none;
  border: none;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 22px; height: 1.5px;
  margin: 0 auto;
  background: var(--color-text);
  transition: transform .3s, opacity .3s, background .3s;
}
.site-header.is-transparent .menu-toggle span { background: #fff; }

/* ---------- Hero (fullscreen video) ---------- */
.hero {
  position: relative;
  height: 100vh;
  height: 100svh;           /* モバイルのアドレスバー対策 */
  min-height: 560px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-charcoal);
}
.hero-media {
  position: absolute;
  inset: 0;
}
.hero-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;         /* スマホでも画面いっぱいに綺麗に表示 */
  object-position: center;
}
/* 動画が無い/読み込めない場合のフォールバック背景 */
.hero-fallback {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 90% 70% at 70% 20%, #3a3d45 0%, transparent 60%),
    radial-gradient(ellipse 80% 60% at 20% 90%, #2a241a 0%, transparent 55%),
    var(--color-charcoal);
  display: none;
}
.hero.no-video .hero-fallback { display: block; }
.hero.no-video video { display: none; }

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,.28) 0%, rgba(0,0,0,.08) 45%, rgba(0,0,0,.38) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
  padding: 0 24px;
}
.hero-eyebrow {
  font-family: var(--font-en);
  font-size: 14px;
  letter-spacing: .42em;
  text-indent: .42em;
  font-weight: 400;
  margin-bottom: 18px;
  opacity: .9;
}
.hero-title {
  font-size: clamp(26px, 4.6vw, 46px);
  font-weight: 500;
  letter-spacing: .14em;
  line-height: 1.6;
  margin-bottom: 14px;
  text-shadow: 0 2px 24px rgba(0,0,0,.35);
}
.hero-sub {
  font-size: clamp(13px, 1.6vw, 16px);
  letter-spacing: .12em;
  font-weight: 300;
  margin-bottom: 40px;
  opacity: .92;
}
.hero-scroll {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}
.hero-scroll span {
  display: block;
  color: rgba(255,255,255,.75);
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: .3em;
  padding-bottom: 44px;
  position: relative;
}
.hero-scroll span::after {
  content: "";
  position: absolute;
  bottom: 0; left: 50%;
  width: 1px; height: 36px;
  background: rgba(255,255,255,.55);
  animation: scrollLine 2s ease-in-out infinite;
  transform-origin: top;
}
@keyframes scrollLine {
  0%   { transform: scaleY(0); }
  45%  { transform: scaleY(1); }
  100% { transform: scaleY(1); opacity: 0; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-size: 14px;
  letter-spacing: .14em;
  padding: 14px 44px;
  border: 1px solid transparent;
  transition: background .3s, color .3s, border-color .3s;
  cursor: pointer;
}
.btn-hero {
  color: #fff;
  border-color: rgba(255,255,255,.85);
  background: rgba(255,255,255,.05);
  backdrop-filter: blur(2px);
}
.btn-hero:hover { background: #fff; color: var(--color-text); }
.btn-primary {
  background: var(--color-charcoal);
  color: #fff;
}
.btn-primary:hover { background: var(--color-accent); }
.btn-outline {
  border-color: var(--color-charcoal);
  color: var(--color-text);
}
.btn-outline:hover { background: var(--color-charcoal); color: #fff; }
.btn-large { padding: 18px 64px; }
.btn-disabled {
  border-color: var(--color-line);
  color: var(--color-text-sub);
  pointer-events: none;
}

/* ---------- Sections common ---------- */
.section { padding: 110px 0; }
.section-heading {
  font-family: var(--font-en);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 400;
  letter-spacing: .16em;
  text-align: center;
  margin-bottom: 64px;
  color: var(--color-text);
}

/* ---------- Products (BALMUDA-like grid) ---------- */
.products { background: var(--color-bg); padding-top: 120px; }
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-card {
  background: var(--color-bg-soft);
  display: flex;
  flex-direction: column;
  transition: transform .35s ease, box-shadow .35s ease;
}
a.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,.08);
}
.product-visual {
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(160deg, #f2f0ec 0%, #e9e5dd 100%);
}
.product-visual img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.product-visual .placeholder-label {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .3em;
  color: #b9b2a4;
}
.product-body {
  padding: 26px 26px 30px;
  text-align: center;
}
.product-name-en {
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--color-accent);
  margin-bottom: 6px;
}
.product-body h3 {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: .08em;
  margin-bottom: 8px;
}
.product-copy {
  font-size: 13.5px;
  color: var(--color-text-sub);
  margin-bottom: 12px;
}
.product-desc {
  font-size: 13px;
  color: var(--color-text-sub);
  line-height: 1.9;
  text-align: left;
  margin-bottom: 16px;
}
.product-status {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--color-accent);
  border: 1px solid var(--color-accent-soft);
  padding: 5px 16px;
}
.product-link-label {
  display: inline-block;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-text);
  padding-bottom: 2px;
}

/* ---------- About (statement) ---------- */
.about { background: var(--color-bg-soft); }
.about-inner { text-align: center; }
.about-statement {
  font-size: clamp(19px, 2.6vw, 26px);
  font-weight: 500;
  letter-spacing: .12em;
  line-height: 2.1;
  margin-bottom: 28px;
}
.about-text {
  font-size: 14.5px;
  color: var(--color-text-sub);
  line-height: 2.2;
  margin-bottom: 36px;
}
.about-tagline {
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: .26em;
  color: var(--color-accent);
}

/* ---------- Promise ---------- */
.promise {
  background: var(--color-charcoal);
  color: #fff;
}
.promise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 56px;
}
.promise-num {
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: .3em;
  color: var(--color-accent);
  margin-bottom: 14px;
}
.promise-item h3 {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: .1em;
  margin-bottom: 12px;
}
.promise-item p {
  font-size: 13.5px;
  color: rgba(255,255,255,.72);
  line-height: 2;
}

/* ---------- News ---------- */
.news { background: var(--color-bg); }
.news-list {
  border-top: 1px solid var(--color-line);
}
.news-list li {
  display: flex;
  gap: 28px;
  align-items: baseline;
  padding: 20px 8px;
  border-bottom: 1px solid var(--color-line);
  font-size: 14px;
}
.news-date {
  font-family: var(--font-en);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--color-text-sub);
  flex-shrink: 0;
}

/* ---------- Contact ---------- */
.contact {
  background: var(--color-bg-soft);
  text-align: center;
}
.contact-lead {
  font-size: 14.5px;
  color: var(--color-text-sub);
  margin-bottom: 36px;
}

/* ---------- Footer (BALMUDA-like columns) ---------- */
.site-footer {
  background: var(--color-charcoal);
  color: rgba(255,255,255,.8);
  padding: 72px 0 36px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-logo { width: 120px; height: auto; flex-shrink: 0; }
.footer-columns {
  display: flex;
  gap: 72px;
  flex-wrap: wrap;
}
.footer-col h4 {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .2em;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  font-size: 13px;
  color: rgba(255,255,255,.65);
  transition: color .3s;
}
.footer-col a:hover { color: #fff; }
.footer-company {
  border-top: 1px solid rgba(255,255,255,.12);
  padding-top: 28px;
  margin-bottom: 20px;
  font-size: 12.5px;
  color: rgba(255,255,255,.55);
}
.copyright {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .1em;
  color: rgba(255,255,255,.4);
}

/* ==========================================================
   Responsive (Mobile)
   ========================================================== */
@media (max-width: 860px) {
  .pc-only { display: none; }

  /* Header / mobile menu */
  .menu-toggle { display: flex; }
  .global-nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: rgba(255,255,255,.98);
    transform: translateY(-16px);
    opacity: 0;
    pointer-events: none;
    transition: transform .3s ease, opacity .3s ease;
    border-bottom: 1px solid var(--color-line);
  }
  .global-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .global-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 12px 0;
  }
  .global-nav a {
    display: block;
    padding: 15px 28px;
    font-size: 15px;
    color: var(--color-text) !important;
  }
  .menu-toggle.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
  .menu-toggle.is-open span:nth-child(2) { opacity: 0; }
  .menu-toggle.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
  /* メニューを開いたら透明ヘッダーでも見えるように白背景へ */
  .site-header.menu-open {
    background: rgba(255,255,255,.98);
    border-bottom-color: var(--color-line);
  }
  .site-header.menu-open .logo-dark { display: block; }
  .site-header.menu-open .logo-light { display: none; }
  .site-header.menu-open .menu-toggle span { background: var(--color-text); }

  /* Sections */
  .section { padding: 72px 0; }
  .section-heading { margin-bottom: 40px; }

  .product-grid { grid-template-columns: 1fr; gap: 20px; }
  .promise-grid { grid-template-columns: 1fr; gap: 36px; }

  .footer-top { flex-direction: column; gap: 36px; }
  .footer-columns { gap: 40px; }

  .news-list li { flex-direction: column; gap: 4px; }
}