/* ============================================================
   luciel — 導入美容液 LP
   concept: 「肌は、光を覚えている。」
   keywords: monochrome / editorial / silence
   palette: pure black × pure white（色は写真に任せる）
   ============================================================ */

:root {
  --black: #000000;
  --white: #ffffff;
  --gray: #8a8a8a;
  --gray-light: #efefef;
  --line: #e5e5e5;

  --ff-serif: "Shippori Mincho", "Noto Serif JP", serif;
  --ff-sans: "Noto Sans JP", sans-serif;
  --ff-en: "Cormorant Garamond", serif;

  --pad-x: clamp(20px, 6vw, 90px);
  --sec-y: clamp(90px, 13vw, 180px);
  --ease: cubic-bezier(0.075, 0.82, 0.165, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--ff-sans);
  color: var(--black);
  background: var(--white);
  font-size: 15px;
  line-height: 2.1;
  letter-spacing: 0.06em;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
::selection { background: var(--gray-light); color: var(--black); }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 var(--pad-x); }

/* ---------- heading ---------- */
.en-label {
  font-family: var(--ff-en);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.36em;
  color: var(--gray);
  display: block;
}
.sec-head { margin-bottom: clamp(44px, 6vw, 80px); }
.sec-head .jp {
  font-family: var(--ff-serif);
  font-size: clamp(24px, 3.8vw, 38px);
  line-height: 1.75;
  letter-spacing: 0.1em;
  margin-top: 16px;
  font-weight: 500;
}
.sec-head--center { text-align: center; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-width: 260px;
  padding: 19px 44px;
  background: var(--black);
  color: var(--white);
  font-size: 13px;
  letter-spacing: 0.24em;
  border: 1px solid var(--black);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  z-index: 1;
  transition: color 0.45s var(--ease);
}
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--white);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.55s cubic-bezier(0.77, 0, 0.175, 1);
  z-index: -1;
}
.btn:hover { color: var(--black); }
.btn:hover::before { transform: scaleX(1); transform-origin: left; }
.btn--ghost { background: transparent; color: var(--black); }
.btn--ghost::before { background: var(--black); }
.btn--ghost:hover { color: var(--white); }
.btn--white { background: var(--white); color: var(--black); border-color: var(--white); }
.btn--white::before { background: transparent; }
.btn--white:hover { color: var(--white); }

/* ---------- header ---------- */
.l-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 90;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px var(--pad-x);
  mix-blend-mode: difference;
  color: #fff;
}
.l-header .logo {
  font-family: var(--ff-en);
  font-size: 22px;
  letter-spacing: 0.34em;
  font-weight: 500;
}
.l-header .cart-link {
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  border-bottom: 1px solid currentColor;
  padding-bottom: 4px;
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  height: 100svh;
  min-height: 620px;
  display: grid;
  place-items: center;
  text-align: center;
  overflow: hidden;
  background: var(--black);
}
.hero video {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.75;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 50%, transparent 30%, rgba(0,0,0,0.55) 100%);
}
.hero__inner { position: relative; z-index: 2; color: var(--white); padding: 0 var(--pad-x); }
.hero__brand {
  font-family: var(--ff-en);
  font-size: clamp(15px, 2vw, 19px);
  letter-spacing: 0.6em;
  margin-bottom: 28px;
  opacity: 0;
  transition: opacity 1.4s ease 0.3s;
}
.hero__catch {
  font-family: var(--ff-serif);
  font-size: clamp(30px, 5.4vw, 62px);
  letter-spacing: 0.14em;
  line-height: 1.7;
  font-weight: 500;
}
.hero__catch .ch {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.5em);
  filter: blur(6px);
  transition: opacity 1s ease, transform 1.2s var(--ease), filter 1.2s ease;
}
.hero.is-loaded .hero__brand { opacity: 1; }
.hero.is-loaded .hero__catch .ch { opacity: 1; transform: none; filter: blur(0); }
.hero__sub {
  margin-top: 26px;
  font-size: 14px;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.8);
  opacity: 0;
  transition: opacity 1.2s ease 1.8s;
}
.hero.is-loaded .hero__sub { opacity: 1; }
.hero__cta { margin-top: 44px; opacity: 0; transition: opacity 1.2s ease 2.1s; }
.hero.is-loaded .hero__cta { opacity: 1; }

/* ---------- statement ---------- */
.statement {
  text-align: center;
}
.statement .big {
  font-family: var(--ff-serif);
  font-size: clamp(21px, 3.2vw, 34px);
  line-height: 2.2;
  letter-spacing: 0.12em;
}
.statement .big em { font-style: normal; border-bottom: 1px solid var(--black); padding-bottom: 6px; }
.statement .small { margin-top: 32px; color: var(--gray); font-size: 14px; max-width: 560px; margin-left: auto; margin-right: auto; }

/* ---------- editorial split ---------- */
.edit { display: grid; grid-template-columns: 1fr 1fr; gap: 0; align-items: stretch; }
.edit .imgbox { overflow: hidden; }
.edit .imgbox img {
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scale(1.12);
  transition: transform 1.8s cubic-bezier(0.22, 0.61, 0.36, 1);
  filter: grayscale(1);
}
.edit .imgbox.is-inview img { transform: scale(1); }
.edit .txt {
  padding: clamp(40px, 7vw, 100px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.edit--dark { background: var(--black); color: var(--white); }
.edit--dark .en-label { color: rgba(255,255,255,0.55); }
.edit .txt h3 {
  font-family: var(--ff-serif);
  font-size: clamp(21px, 2.8vw, 30px);
  letter-spacing: 0.1em;
  line-height: 1.8;
  margin: 16px 0 22px;
  font-weight: 500;
}
.edit .txt p { font-size: 14px; opacity: 0.82; }
.edit .txt .note { margin-top: 22px; font-size: 11.5px; color: var(--gray); }
.edit--dark .txt .note { color: rgba(255,255,255,0.45); }

/* ---------- 数字の実感 ---------- */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; background: var(--line); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stat { background: var(--white); padding: clamp(44px, 6vw, 72px) 24px; text-align: center; }
.stat .num {
  font-family: var(--ff-en);
  font-size: clamp(48px, 6.5vw, 76px);
  line-height: 1;
  font-weight: 500;
}
.stat .num sup { font-size: 0.4em; }
.stat .lbl { margin-top: 14px; font-size: 12.5px; letter-spacing: 0.16em; color: var(--gray); }
.stats-note { text-align: center; font-size: 11px; color: var(--gray); margin-top: 18px; letter-spacing: 0.1em; }

/* ---------- how to ---------- */
.howto { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; counter-reset: h; }
.howto li {
  counter-increment: h;
  border-top: 1px solid var(--black);
  padding-top: 26px;
}
.howto li::before {
  content: "0" counter(h);
  font-family: var(--ff-en);
  font-style: italic;
  font-size: 15px;
  letter-spacing: 0.2em;
  color: var(--gray);
  display: block;
  margin-bottom: 14px;
}
.howto h3 { font-family: var(--ff-serif); font-size: 17px; letter-spacing: 0.1em; margin-bottom: 10px; }
.howto p { font-size: 13.5px; color: var(--gray); }

/* ---------- voice ---------- */
.voice-list { max-width: 760px; margin: 0 auto; }
.voice-list li {
  border-bottom: 1px solid var(--line);
  padding: 36px 0;
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 28px;
}
.voice-list .meta { font-size: 12px; color: var(--gray); letter-spacing: 0.1em; line-height: 1.9; }
.voice-list .meta .age { font-family: var(--ff-en); font-size: 26px; color: var(--black); }
.voice-list p { font-size: 14.5px; }
.voice-list .stars { font-size: 12px; letter-spacing: 5px; margin-top: 12px; }

/* ---------- price ---------- */
.price-band { background: var(--black); color: var(--white); text-align: center; }
.price-band .en-label { color: rgba(255,255,255,0.5); }
.price-band .product-name { font-family: var(--ff-en); letter-spacing: 0.4em; font-size: 15px; margin-top: 26px; }
.price-band .jp-name { font-family: var(--ff-serif); font-size: clamp(22px, 3vw, 30px); letter-spacing: 0.14em; margin-top: 10px; }
.price-band .price { font-family: var(--ff-en); font-size: clamp(52px, 7vw, 84px); line-height: 1.15; margin-top: 28px; }
.price-band .price small { font-size: 0.32em; letter-spacing: 0.2em; }
.price-band .strike { font-size: 15px; color: rgba(255,255,255,0.5); text-decoration: line-through; margin-left: 14px; }
.price-band .sub { margin-top: 18px; font-size: 13px; color: rgba(255,255,255,0.65); letter-spacing: 0.12em; }
.price-band .guarantee {
  margin: 40px auto 0;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  border: 1px solid rgba(255,255,255,0.3);
  padding: 14px 30px;
  font-size: 12.5px;
  letter-spacing: 0.16em;
}
.price-band .guarantee svg { width: 20px; height: 20px; stroke: var(--white); fill: none; stroke-width: 1.5; }
.price-band .btn { margin-top: 40px; }
.price-band .caution { margin-top: 26px; font-size: 11px; color: rgba(255,255,255,0.4); letter-spacing: 0.1em; }

/* ---------- FAQ ---------- */
.faq { max-width: 760px; margin: 0 auto; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 26px 4px;
  font-family: var(--ff-serif);
  font-size: 16px;
  letter-spacing: 0.08em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: var(--ff-en);
  font-size: 24px;
  color: var(--gray);
  transition: transform 0.4s var(--ease);
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .answer { padding: 0 4px 26px; font-size: 14px; color: var(--gray); max-width: 92%; }

/* ---------- footer ---------- */
.l-footer { background: var(--black); color: rgba(255,255,255,0.6); padding: 56px var(--pad-x); font-size: 12px; letter-spacing: 0.14em; }
.l-footer .inner { max-width: 1080px; margin: 0 auto; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 18px; align-items: center; }
.l-footer .logo { font-family: var(--ff-en); font-size: 18px; letter-spacing: 0.4em; color: #fff; }

/* ---------- fixed CTA ---------- */
.fixed-cta {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 80;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: opacity 0.5s, transform 0.5s var(--ease);
}
.fixed-cta.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.fixed-cta .btn { min-width: 0; padding: 16px 32px; box-shadow: 0 20px 40px -12px rgba(0,0,0,0.5); }

/* reveal */
[data-reveal] { opacity: 0; transform: translateY(30px); transition: opacity 1s ease, transform 1.1s var(--ease); }
[data-reveal].is-inview { opacity: 1; transform: none; }
[data-reveal-delay="1"] { transition-delay: 0.15s; }
[data-reveal-delay="2"] { transition-delay: 0.3s; }

.sec { padding: var(--sec-y) 0; }
.sec--gray { background: #f7f7f5; }

@media (max-width: 900px) {
  .edit { grid-template-columns: 1fr; }
  .edit .imgbox img { aspect-ratio: 4/3; }
  .stats { grid-template-columns: 1fr; }
  .howto { grid-template-columns: 1fr; }
  .voice-list li { grid-template-columns: 1fr; gap: 12px; }
  .l-header .cart-link { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}

/* lining figures: 電話番号・料金など機能的な数字は等揃いに */
body{font-feature-settings:"palt" 1,"lnum" 1}

/* mobile: 見出しの句読点ぶら下がり防止 */
.only-sp { display: none; }
@media (max-width: 640px) { .only-sp { display: block; } }