/* =====================================================================
   SALON ISM - デザイン基盤
   淡いラベンダー/ブルー × ホワイト、明朝系見出し、余白多めの上品な構成
   ===================================================================== */

:root {
  /* color */
  --c-bg: #ffffff;
  --c-bg-soft: #f6f7fb;
  --c-bg-accent: #eceef7;
  --c-ink: #36363f;
  --c-ink-soft: #6f6f7d;
  --c-line: #e5e7f0;
  --c-accent: #8a93c2;        /* ラベンダーブルー */
  --c-accent-deep: #5d6699;
  --c-accent-soft: #b7bedd;
  --c-white: #ffffff;

  /* type */
  --font-en: "Cormorant Garamond", "Times New Roman", serif;
  --font-jp: "Noto Serif JP", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --font-sans: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", "Meiryo", sans-serif;

  /* layout */
  --maxw: 1080px;
  --gutter: clamp(1.1rem, 4vw, 3rem);
  --radius: 12px;
  --shadow: 0 14px 40px rgba(60, 66, 110, 0.10);
  --shadow-soft: 0 6px 20px rgba(60, 66, 110, 0.07);
  --header-h: 72px;
}

/* ---------- base ---------- */
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--c-ink);
  background: var(--c-bg);
  line-height: 1.85;
  font-size: 16px;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }

a { color: inherit; transition: color 0.2s ease, opacity 0.2s ease; }
a:hover { color: var(--c-accent-deep); }

h1, h2, h3, h4 { font-weight: 500; line-height: 1.35; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* 共通セクション見出し（英字＋和文サブ） */
.section-head { text-align: center; margin-bottom: clamp(2rem, 5vw, 3.5rem); }
.section-head .en {
  font-family: var(--font-en);
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: 0.08em;
  color: var(--c-accent-deep);
  display: block;
}
.section-head .jp {
  font-family: var(--font-jp);
  font-size: 0.95rem;
  letter-spacing: 0.25em;
  color: var(--c-ink-soft);
  margin-top: 0.6rem;
  display: block;
}
.section-head .en::after {
  content: "";
  display: block;
  width: 48px;
  height: 1px;
  background: var(--c-accent-soft);
  margin: 1.1rem auto 0;
}

.section { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.section--soft { background: var(--c-bg-soft); }

.lead {
  max-width: 720px;
  margin-inline: auto;
  text-align: center;
  color: var(--c-ink-soft);
  font-family: var(--font-jp);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.85em 2.2em;
  font-family: var(--font-en);
  font-size: 1.05rem;
  letter-spacing: 0.12em;
  border: 1px solid var(--c-accent);
  border-radius: 999px;
  color: var(--c-accent-deep);
  background: transparent;
  cursor: pointer;
}
.btn:hover { background: var(--c-accent); color: #fff; }
.btn--solid { background: var(--c-accent); color: #fff; }
.btn--solid:hover { background: var(--c-accent-deep); border-color: var(--c-accent-deep); color: #fff; }

/* =====================================================================
   HEADER
   ===================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--c-line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}
.brand { display: flex; align-items: center; }
.brand__logo { display: block; height: 52px; width: auto; }

.nav { display: flex; align-items: center; }
.nav__list { display: flex; align-items: center; gap: clamp(1rem, 2.5vw, 2.2rem); }
.nav__item { position: relative; }
.nav__link {
  font-family: var(--font-en);
  font-size: 1.05rem;
  letter-spacing: 0.1em;
  padding: 0.4em 0.1em;
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
}
.nav__link[aria-current="page"] { color: var(--c-accent-deep); }
.nav__item--has-menu > .nav__link::after {
  content: "";
  width: 6px; height: 6px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  opacity: 0.6;
}

/* dropdown */
.nav__menu {
  position: absolute;
  top: calc(100% + 0.4rem);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 220px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.6rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}
.nav__item--has-menu:hover .nav__menu,
.nav__item--has-menu:focus-within .nav__menu {
  opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0);
}
.nav__menu a {
  display: block;
  padding: 0.6em 0.9em;
  border-radius: 8px;
  font-family: var(--font-jp);
  font-size: 0.92rem;
  white-space: nowrap;
}
.nav__menu a:hover { background: var(--c-bg-accent); color: var(--c-accent-deep); }

/* hamburger */
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  position: relative;
  background: transparent;
  border: 0;
  cursor: pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 10px;
  width: 24px; height: 1.5px;
  background: var(--c-ink);
  transition: transform 0.25s ease, opacity 0.2s ease;
}
.nav-toggle span { top: 21px; }
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-7px) rotate(-45deg); }

/* =====================================================================
   FOOTER
   ===================================================================== */
.site-footer {
  background: var(--c-accent-deep);
  color: #eef0fa;
  padding-block: clamp(2.5rem, 6vw, 4rem);
  text-align: center;
}
.site-footer__brand {
  font-family: var(--font-en);
  font-size: 1.6rem;
  letter-spacing: 0.16em;
}
.site-footer__sub { font-size: 0.62rem; letter-spacing: 0.34em; opacity: 0.8; text-transform: uppercase; margin-top: 0.3rem; }
.sns {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  margin: 1.6rem 0 1.4rem;
}
.sns a {
  width: 42px; height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 50%;
}
.sns a:hover { background: #fff; color: var(--c-accent-deep); }
.sns svg { width: 18px; height: 18px; fill: currentColor; }
.site-footer__copy { font-size: 0.78rem; opacity: 0.75; letter-spacing: 0.08em; }
.site-footer__nav {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 0.4rem 1.4rem; margin-bottom: 1.6rem;
  font-family: var(--font-en); font-size: 0.95rem; letter-spacing: 0.08em;
}
.site-footer__nav a { opacity: 0.9; }
.site-footer__nav a:hover { opacity: 1; color: #fff; }

/* =====================================================================
   HERO（汎用ページヘッダー画像）
   ===================================================================== */
.hero {
  position: relative;
  min-height: clamp(320px, 60vh, 560px);
  display: grid;
  place-items: center;
  text-align: center;
  color: #fff;
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.02);
}
video.hero__bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(93,102,153,0.30), rgba(54,54,63,0.42));
}
.hero__inner { position: relative; z-index: 1; padding: var(--gutter); }
.hero__title {
  font-family: var(--font-en);
  font-size: clamp(2.6rem, 8vw, 4.8rem);
  letter-spacing: 0.1em;
  text-shadow: 0 2px 20px rgba(0,0,0,0.25);
}
.hero__sub {
  font-family: var(--font-jp);
  letter-spacing: 0.22em;
  margin-top: 0.8rem;
  font-size: clamp(0.9rem, 2.5vw, 1.1rem);
}

/* ページ下層用の小さめ見出し帯 */
.page-hero { min-height: clamp(240px, 42vh, 380px); }

/* =====================================================================
   CARD グリッド（コース一覧・番号付き手順など）
   ===================================================================== */
.grid {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
}
.card__media { aspect-ratio: 4 / 3; overflow: hidden; background: var(--c-bg-accent); }
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.card:hover .card__media img { transform: scale(1.05); }
.card__body { padding: 1.4rem 1.5rem 1.7rem; display: flex; flex-direction: column; gap: 0.6rem; flex: 1; }
.card__no { font-family: var(--font-en); font-size: 1.1rem; color: var(--c-accent); letter-spacing: 0.1em; }
.card__title { font-family: var(--font-jp); font-size: 1.12rem; color: var(--c-ink); }
.card__text { font-size: 0.9rem; color: var(--c-ink-soft); }
.card--link { text-decoration: none; }
.card--link .card__title::after { content: " →"; color: var(--c-accent); }

/* メディア＋テキストの交互レイアウト */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(1.5rem, 5vw, 4rem);
}
.feature--reverse .feature__media { order: 2; }
.feature__media img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); }
.feature__title {
  font-family: var(--font-jp);
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  margin-bottom: 1rem;
  color: var(--c-accent-deep);
}
.feature__text { color: var(--c-ink-soft); }

/* 注意書き・リスト枠 */
.note {
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: clamp(1.3rem, 3vw, 2rem);
}
.note__title { font-family: var(--font-jp); color: var(--c-accent-deep); margin-bottom: 0.8rem; }
.note ul { padding-left: 1.2em; }
.note li { list-style: disc; margin-bottom: 0.3rem; color: var(--c-ink-soft); font-size: 0.92rem; }

/* タグ風リスト（脱毛パーツなど） */
.taglist { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.taglist li {
  background: var(--c-bg-accent);
  color: var(--c-accent-deep);
  border-radius: 999px;
  padding: 0.45em 1.1em;
  font-size: 0.9rem;
  font-family: var(--font-jp);
}

.prose { max-width: 760px; margin-inline: auto; }
.prose p { margin-bottom: 1.1rem; }
.prose p:last-child { margin-bottom: 0; }
.text-center { text-align: center; }
.accent { color: var(--c-accent-deep); }

/* =====================================================================
   CONTACT（フォーム・店舗情報）
   ===================================================================== */
.form { max-width: 620px; margin-inline: auto; display: flex; flex-direction: column; gap: 1.3rem; }
.field { display: flex; flex-direction: column; gap: 0.45rem; }
.field label {
  font-family: var(--font-jp);
  font-size: 0.9rem;
  color: var(--c-ink);
  letter-spacing: 0.06em;
}
.field input,
.field textarea {
  width: 100%;
  font-family: inherit;
  font-size: 1rem;
  color: var(--c-ink);
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line);
  border-radius: 10px;
  padding: 0.8em 1em;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(138, 147, 194, 0.18);
}
.field textarea { min-height: 160px; resize: vertical; }
.form__actions { text-align: center; margin-top: 0.4rem; }
.form__note {
  margin-top: 1.2rem;
  background: var(--c-bg-accent);
  border: 1px solid var(--c-accent-soft);
  border-radius: 10px;
  padding: 1rem 1.2rem;
  font-family: var(--font-jp);
  font-size: 0.92rem;
  color: var(--c-accent-deep);
  text-align: center;
}
.form__note--error {
  background: #fbecee;
  border-color: #d98a95;
  color: #a63b4c;
}
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.info { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(1.5rem, 4vw, 3rem); align-items: start; }
.info__list { font-family: var(--font-jp); }
.info__row { padding: 1rem 0; border-bottom: 1px solid var(--c-line); }
.info__row:first-child { padding-top: 0; }
.info__label {
  display: block;
  font-family: var(--font-en);
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  color: var(--c-accent);
  margin-bottom: 0.2rem;
}
.info__value { color: var(--c-ink); }
.info__value a { color: var(--c-accent-deep); text-decoration: underline; text-underline-offset: 3px; }
.info__note { font-size: 0.82rem; color: var(--c-ink-soft); margin-top: 0.3rem; }
.info__media img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow-soft); }
.map {
  width: 100%; aspect-ratio: 16 / 10; border: 0; border-radius: var(--radius);
  box-shadow: var(--shadow-soft); margin-top: 1.5rem;
}
.line-btn {
  display: inline-flex; align-items: center; gap: 0.5em;
  background: #06c755; color: #fff; border-radius: 999px;
  padding: 0.7em 1.6em; font-family: var(--font-jp); font-size: 0.95rem;
  margin-top: 0.6rem;
}
.line-btn:hover { background: #05b34c; color: #fff; }

@media (max-width: 760px) {
  .info { grid-template-columns: 1fr; }
}

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media (max-width: 880px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .feature { grid-template-columns: 1fr; }
  .feature--reverse .feature__media { order: 0; }

  .nav-toggle { display: block; z-index: 120; }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: #fff;
    border-bottom: 1px solid var(--c-line);
    box-shadow: var(--shadow);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .nav.is-open { max-height: 80vh; overflow: auto; }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0; padding: 0.5rem 0 1.2rem; }
  .nav__item { border-bottom: 1px solid var(--c-line); }
  .nav__link { padding: 1em var(--gutter); justify-content: space-between; font-size: 1.15rem; }
  .nav__menu {
    position: static; transform: none; opacity: 1; visibility: visible;
    box-shadow: none; border: 0; border-radius: 0; min-width: 0;
    padding: 0 0 0.6rem; background: var(--c-bg-soft);
  }
  .nav__menu a { padding-left: calc(var(--gutter) + 1rem); }
  .nav__item--has-menu > .nav__link::after { transform: rotate(45deg); }
}

@media (max-width: 540px) {
  .grid--4, .grid--3, .grid--2 { grid-template-columns: 1fr; }
}