/* =========================================================
   THE MOUTH — style.css
   Apple × Aesop ミニマルラグジュアリー
   白基調 / 余白多め / ネイビーアクセント / 細罫線
   ========================================================= */

/* ---------- Design Tokens ---------- */
:root {
  --navy: #1c2b4a;          /* ブランドネイビー（フッター・見出し） */
  --navy-soft: #496e85;     /* ロゴ波線のスチールブルー（フッター背景） */
  --ink: #2b3447;           /* 本文 */
  --ink-light: #6b7280;     /* 補足テキスト */
  --bg: #fbfaf8;            /* ベース背景（わずかに温かい白） */
  --bg-beige: #f4f1ea;      /* News カード等のベージュ */
  --line: #d9d6cf;          /* 細罫線 */
  --white: #ffffff;

  --font-en: "Jost", "Helvetica Neue", Arial, sans-serif;
  --font-jp: "Zen Old Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;

  --footer-h-sp: 76px;      /* SP固定フッター高さ */
  --section-pad: clamp(96px, 12vw, 180px);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-jp);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.9;
  letter-spacing: 0.08em;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
address { font-style: normal; }

.br-sp { display: none; }

/* =========================================================
   Header
   ========================================================= */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px clamp(24px, 4vw, 56px);
  transition: background 0.4s ease, padding 0.4s ease, box-shadow 0.4s ease;
}
.header.is-scrolled {
  background: rgba(251, 250, 248, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding-block: 14px;
  box-shadow: 0 1px 0 rgba(28, 43, 74, 0.06);
}
/* ヘッダーロゴ：FVでは非表示、スクロールでフェードイン
   （FVにロゴがあるため重複を避ける） */
.header__logo {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.4s ease, visibility 0.4s ease, transform 0.4s ease;
  pointer-events: none;
}
.header.is-logo-visible .header__logo,
body.is-menu-open .header__logo {
  opacity: 1;
  visibility: visible;
  transform: none;
  pointer-events: auto;
}
.header__logo img {
  width: clamp(96px, 9vw, 132px);
  height: auto;
  transition: width 0.4s ease;
}
.header.is-scrolled .header__logo img { width: 88px; }

.header__nav ul { display: flex; gap: clamp(28px, 3.4vw, 52px); }
.header__nav a {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 13px;
  letter-spacing: 0.28em;
  color: var(--navy);
  position: relative;
  padding-bottom: 4px;
}
.header__nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--navy);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s ease;
}
.header__nav a:hover::after { transform: scaleX(1); transform-origin: left; }

/* Hamburger（SPのみ表示） */
.header__menu {
  display: none;
  width: 44px; height: 44px;
  background: none; border: none; cursor: pointer;
  position: relative; z-index: 110;
}
.header__menu span {
  position: absolute;
  left: 8px; right: 8px;
  height: 1px;
  background: var(--navy);
  transition: transform 0.35s ease, top 0.35s ease;
}
.header__menu span:nth-child(1) { top: 17px; }
.header__menu span:nth-child(2) { top: 26px; }
body.is-menu-open .header__menu span:nth-child(1) { top: 21px; transform: rotate(20deg); }
body.is-menu-open .header__menu span:nth-child(2) { top: 21px; transform: rotate(-20deg); }

/* SP menu overlay */
.sp-menu {
  position: fixed;
  inset: 0;
  z-index: 105;
  background: rgba(251, 250, 248, 0.97);
  backdrop-filter: blur(8px);
  display: grid;
  place-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}
body.is-menu-open .sp-menu { opacity: 1; visibility: visible; }
.sp-menu ul { text-align: center; display: grid; gap: 36px; }
.sp-menu a {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 17px;
  letter-spacing: 0.34em;
  color: var(--navy);
}

/* =========================================================
   First View
   ========================================================= */
.fv {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  /* SCROLL表示分の余白を下部に確保しコンテンツとの衝突を防ぐ */
  padding-block: 96px 120px;
}

/* シルク調背景：画像差し替えは .fv__bg に background-image を1行追加するだけ */
.fv__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    /* 画像を用意したら下行のコメントを外す
    url("../assets/img/fv-silk.jpg") center / cover no-repeat, */
    radial-gradient(120% 90% at 78% 30%, rgba(255,255,255,0.0) 0%, rgba(214,209,198,0.35) 55%, rgba(199,196,189,0.45) 100%),
    linear-gradient(118deg, #f6f4f0 0%, #fdfcfa 30%, #efece5 52%, #faf8f4 68%, #e7e3da 100%);
}
/* 布の陰影を思わせる柔らかな帯 */
.fv__bg::before,
.fv__bg::after {
  content: "";
  position: absolute;
  inset: -20%;
  background: linear-gradient(115deg,
    transparent 18%, rgba(255,255,255,0.65) 28%, transparent 39%,
    rgba(184,180,170,0.28) 52%, transparent 60%,
    rgba(255,255,255,0.5) 72%, transparent 84%);
  filter: blur(28px);
}
.fv__bg::after {
  background: linear-gradient(245deg,
    transparent 25%, rgba(176,170,158,0.22) 42%, transparent 55%,
    rgba(255,255,255,0.55) 68%, transparent 80%);
  filter: blur(46px);
}

.fv__inner { text-align: center; padding: 0 24px; }

.fv__title { font-weight: 400; }
.fv__logo {
  width: clamp(200px, 22vw, 320px);
  height: auto;
  margin: 0 auto;
}
.fv__divider {
  display: block;
  width: 1px;
  height: clamp(28px, 4vw, 44px);
  margin: clamp(22px, 3vw, 36px) auto;
  background: var(--navy);
  opacity: 0.6;
}
.fv__copy {
  font-size: clamp(16px, 1.8vw, 23px);
  letter-spacing: 0.3em;
  text-indent: 0.3em;
  color: var(--ink);
}
.fv__open {
  margin-top: clamp(30px, 4.4vw, 56px);
  display: grid;
  gap: 8px;
  font-family: var(--font-en);
  color: var(--navy);
}
.fv__date {
  font-weight: 300;
  font-size: clamp(22px, 2.4vw, 30px);
  letter-spacing: 0.34em;
  text-indent: 0.34em;
}
.fv__soon {
  font-weight: 300;
  font-size: clamp(13px, 1.3vw, 16px);
  letter-spacing: 0.44em;
  text-indent: 0.44em;
}
.fv__place {
  font-weight: 300;
  font-size: clamp(11px, 1vw, 13px);
  letter-spacing: 0.5em;
  text-indent: 0.5em;
  opacity: 0.75;
}

/* 縦書きサイドテキスト（PCのみ） */
.fv__side {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 10px;
  letter-spacing: 0.42em;
  color: var(--navy);
  opacity: 0.55;
  white-space: nowrap;
}
.fv__side--left { left: clamp(18px, 2.4vw, 40px); }
.fv__side--right { right: clamp(18px, 2.4vw, 40px); }

/* Scroll indicator */
.fv__scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  display: grid;
  justify-items: center;
  gap: 10px;
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 10px;
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  color: var(--navy);
}
.fv__scroll::after {
  content: "";
  width: 1px;
  height: 44px;
  background: var(--navy);
  animation: scrollLine 2.2s ease-in-out infinite;
  transform-origin: top;
}
@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  45% { transform: scaleY(1); transform-origin: top; }
  55% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* =========================================================
   Sections（共通）
   ========================================================= */
.section {
  padding: var(--section-pad) clamp(24px, 6vw, 80px);
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}
.section.is-visible { opacity: 1; transform: none; }

.section__inner {
  max-width: 760px;
  margin: 0 auto;
}
.section__title {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: clamp(15px, 1.5vw, 18px);
  letter-spacing: 0.42em;
  color: var(--navy);
  margin-bottom: clamp(40px, 5vw, 64px);
  position: relative;
  padding-bottom: 18px;
}
.section__title::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 36px; height: 1px;
  background: var(--navy);
}

/* ---------- Concept ---------- */
.concept { text-align: center; }
.concept .section__title { text-align: center; }
.concept .section__title::after { left: 50%; transform: translateX(-50%); }
.concept__text {
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 2.6;
  letter-spacing: 0.14em;
}

/* ---------- Treatment ---------- */
.treatment__list {
  display: grid;
  gap: clamp(40px, 5vw, 56px);
}
.treatment__item {
  display: flex;
  align-items: center;
  gap: clamp(24px, 3.6vw, 44px);
  padding-bottom: clamp(40px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
}
.treatment__item:last-child { border-bottom: none; padding-bottom: 0; }
.treatment__icon {
  flex-shrink: 0;
  width: clamp(72px, 8vw, 96px);
  height: clamp(72px, 8vw, 96px);
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--navy);
  background: var(--white);
}
.treatment__icon svg { width: 52%; height: 52%; }
.treatment__name {
  font-family: var(--font-en);
  font-weight: 400;
  font-size: clamp(17px, 2vw, 22px);
  letter-spacing: 0.22em;
  color: var(--navy);
}
.treatment__jp {
  font-size: clamp(13px, 1.3vw, 15px);
  letter-spacing: 0.22em;
  color: var(--navy);
  margin: 6px 0 12px;
}
.treatment__desc {
  font-size: clamp(13px, 1.35vw, 15px);
  color: var(--ink-light);
  letter-spacing: 0.1em;
}

/* ---------- Clinic ---------- */
.clinic__table {
  border-top: 1px solid var(--line);
}
.clinic__row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  padding: clamp(20px, 2.4vw, 28px) 8px;
  border-bottom: 1px solid var(--line);
}
.clinic__row dt {
  font-size: clamp(13px, 1.35vw, 15px);
  letter-spacing: 0.24em;
  color: var(--navy);
}
.clinic__row dd {
  font-size: clamp(13px, 1.4vw, 15.5px);
  letter-spacing: 0.12em;
}

/* ---------- News ---------- */
.news__card {
  background: var(--bg-beige);
  border: 1px solid var(--line);
  text-align: center;
  padding: clamp(48px, 6vw, 72px) clamp(24px, 4vw, 48px);
}
.news__date {
  font-size: clamp(14px, 1.5vw, 17px);
  letter-spacing: 0.22em;
  color: var(--navy);
}
.news__title {
  font-size: clamp(16px, 1.8vw, 20px);
  letter-spacing: 0.22em;
  color: var(--navy);
  margin-top: 6px;
}
.news__divider {
  display: block;
  width: 32px;
  height: 1px;
  background: var(--navy);
  opacity: 0.5;
  margin: clamp(20px, 2.6vw, 30px) auto;
}
.news__text {
  font-size: clamp(13px, 1.35vw, 15px);
  letter-spacing: 0.12em;
  color: var(--ink-light);
}

/* ---------- Access ---------- */
.access__address {
  font-size: clamp(13.5px, 1.4vw, 15.5px);
  letter-spacing: 0.12em;
  margin-bottom: clamp(28px, 3.4vw, 40px);
}
.access__map {
  border: 1px solid var(--line);
  background: var(--white);
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
}
.access__map iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}
.access__map-placeholder {
  text-align: center;
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 14px;
  letter-spacing: 0.36em;
  text-indent: 0.36em;
  color: var(--navy);
  opacity: 0.55;
  line-height: 2.4;
}
.access__map-placeholder span {
  font-size: 10px;
  letter-spacing: 0.3em;
}

/* =========================================================
   Footer（CTA）
   ========================================================= */
.footer {
  background: var(--navy-soft);
  color: var(--white);
  padding: clamp(28px, 3.6vw, 44px) clamp(24px, 5vw, 64px) 20px;
}
.footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}
.footer__btn {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px clamp(16px, 2.6vw, 40px);
  position: relative;
  transition: opacity 0.3s ease;
}
.footer__btn:hover { opacity: 0.7; }
.footer__btn + .footer__btn::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 56px;
  background: rgba(255, 255, 255, 0.25);
}
.footer__icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  display: grid;
  place-items: center;
}
.footer__icon svg { width: 58%; height: 58%; }
.footer__label { display: grid; gap: 2px; line-height: 1.5; }
.footer__label-main {
  font-size: 14.5px;
  letter-spacing: 0.16em;
}
.footer__label-sub {
  font-size: 12px;
  letter-spacing: 0.14em;
  opacity: 0.85;
}
.footer__arrow {
  margin-left: auto;
  font-family: var(--font-en);
  font-weight: 200;
  font-size: 18px;
}
.footer__copy {
  text-align: center;
  margin-top: 22px;
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 10px;
  letter-spacing: 0.3em;
  opacity: 0.55;
}

/* =========================================================
   Responsive — SP（〜860px）
   ========================================================= */
@media (max-width: 860px) {
  .br-sp { display: inline; }

  .header { padding: 20px 20px; }
  .header__nav { display: none; }
  .header__menu { display: block; }
  .header__logo img { width: 92px; }
  .header.is-scrolled .header__logo img { width: 76px; }

  .fv {
    min-height: 100svh;
    /* 下部に固定フッター＋SCROLL分の余白を確保し、コンテンツとの衝突を防ぐ */
    padding-top: 64px;
    padding-bottom: calc(var(--footer-h-sp) + 88px);
  }
  .fv__side { display: none; }
  .fv__logo { width: clamp(150px, 44vw, 320px); }
  .fv__copy { font-size: 16.5px; letter-spacing: 0.2em; text-indent: 0.2em; line-height: 2.2; }
  .fv__scroll {
    bottom: calc(var(--footer-h-sp) + 28px);
    font-size: 9px;
    gap: 8px;
  }
  .fv__scroll::after { height: 32px; }

  .section { padding-inline: 24px; }

  .treatment__item {
    align-items: flex-start;
    gap: 20px;
  }
  .treatment__icon { width: 64px; height: 64px; }

  .clinic__row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 18px 4px;
  }

  /* ---- SP: 固定フッター ---- */
  body { padding-bottom: var(--footer-h-sp); }
  .footer {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 90;
    padding: 0;
    height: var(--footer-h-sp);
    box-shadow: 0 -4px 20px rgba(28, 43, 74, 0.18);
  }
  .footer__inner {
    height: 100%;
    grid-template-columns: repeat(2, 1fr);
  }
  .footer__btn {
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    padding: 8px 4px;
    text-align: center;
  }
  .footer__btn + .footer__btn::before { height: 44px; }
  .footer__icon {
    width: 26px; height: 26px;
    border: none;
  }
  .footer__icon svg { width: 100%; height: 100%; }
  .footer__label { gap: 0; }
  .footer__label-main { font-size: 10.5px; letter-spacing: 0.06em; }
  .footer__label-sub { font-size: 9px; letter-spacing: 0.02em; opacity: 0.8; }
  .footer__arrow { display: none; }
  .footer__copy { display: none; }
}

/* SPの非常に小さい画面 */
@media (max-width: 360px) {
  .footer__label-sub { display: none; }
}

/* 画面高さが低い端末：SCROLLを非表示にして衝突を回避 */
@media (max-height: 640px) {
  .fv__scroll { display: none; }
  .fv { padding-bottom: var(--footer-h-sp); }
}

/* =========================================================
   Reduced motion
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .section { opacity: 1; transform: none; transition: none; }
  .fv__scroll::after { animation: none; }
}