/* ============================================================
   header.css  — Static header & nav styles
   Replaces Astra theme header CSS (deleted as WP-specific).
   Design reference: pilates-studio-biju.com
   ============================================================ */

/* ── CSS variables (from deleted astra-theme-css-inline-css) ── */
:root {
  --ast-global-color-0: #f0efe6;
  --ast-global-color-1: #dccfc1;
  --ast-global-color-2: #b8aea8;
  --ast-global-color-3: #393831;
  --ast-global-color-4: #fff9f4;
  --ast-global-color-5: #FFFFFF;
  --ast-global-color-6: #333333;
  --ast-global-color-7: #eaeaea;
  --ast-global-color-primary: var(--ast-global-color-5);
  --ast-global-color-secondary: var(--ast-global-color-4);
  --header-height: 90px;
}

/* ── Accessibility helpers (lost when Astra CSS was removed) ── */
.screen-reader-text {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.screen-reader-text:focus {
  position: static !important;
  width: auto;
  height: auto;
  clip: auto;
  white-space: normal;
}

/* ── Base reset ── */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Noto Serif JP', serif;
  font-weight: 500;
  font-size: 16px;
  background-color: var(--ast-global-color-4);
  color: var(--ast-global-color-3);
}

/* ── Site header ── */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  /*background: var(--ast-global-color-2);*/
  background-color: color-mix(in srgb, var(--ast-global-color-2) 75%, transparent);
  height: var(--header-height);
  box-shadow: 0 1px 4px rgb(0 0 0 / 0.06);

  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 1px 4px color-mix(in srgb, var(--ast-global-color-3) 30%, transparent);
}


@media screen and (max-width: 768px) {
  #site-header {
    height: 60px;
  }

  #site-header .logo {
    text-align: left;
  }

  #site-header .logo img {
    height: 20px;
    width: auto;
  }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 40px;
  max-width: 1400px;
  margin: 0 auto;
}

/* ── Logo ── */
.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo img {
  display: block;
  width: 280px;
  height: 29px;
  object-fit: contain;
  transition: opacity 0.2s;
}

.site-logo:hover img {
  opacity: 0.75;
}

/* ── Desktop nav ── */
#site-nav {
  display: flex;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0;
}

.nav-menu li {
  display: flex;
  align-items: center;
}

.nav-menu a {
  display: flex;
  align-items: center;
  height: var(--header-height);
  padding: 0 1.25em;
  font-family: 'Noto Serif JP', serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--ast-global-color-5);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-menu a:hover {
  color: var(--ast-global-color-3);
}

/* ── Mobile toggle button (hidden on desktop) ── */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin: 10px 10px;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  position: relative;
  box-shadow: none;
}

.nav-toggle:hover,
.nav-toggle:focus {
  background: none;
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--ast-global-color-3);
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle-icon {
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-icon::before {
  top: -7px;
}

.nav-toggle-icon::after {
  top: 7px;
}

/* Open state */
.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Offset body for fixed header ── */
/* padding-top removed: .biju-page-header margin:90px handles inner-page spacing,
   #content-header's own height/padding handles home page spacing */

/* ── Mobile breakpoint ── */
@media screen and (max-width: 920px) {
  .header-inner {
    padding: 0 20px;
  }

  .site-logo img {
    width: 200px;
  }

  .nav-toggle {
    display: flex;
  }

  #site-nav {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--ast-global-color-5);
    box-shadow: 0 4px 8px rgb(0 0 0 / 0.08);
    z-index: 9998;

    background-color: color-mix(in srgb, var(--ast-global-color-3) 75%, transparent);
    

    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 1px 4px color-mix(in srgb, var(--ast-global-color-3) 30%, transparent);
  }

  #site-nav.is-open {
    display: block;
    height: 100lvh;
  }

  .nav-menu {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 0;
    height:100%;
    justify-content: center;
    gap: 1em;
  }

  .nav-menu li {
    width: 100%;
        justify-content: center;
  }

  .nav-menu a {
    height: auto;
    padding: 14px 24px;
    font-size: 14px;
    border-bottom: 1px solid var(--ast-global-color-7);
  }
}

/* ── Mobile menu JS ── */
/* Toggle via: button.nav-toggle click → #site-nav.classList.toggle('is-open') */
/* and aria-expanded on the button.                                              */

/* ── Home: hide header while hero is in view (mobile/tablet only) ── */
/* JS adds .hero-active on init; removes it once hero scrolls out.    */
/*@media screen and (max-width: 920px) {*/
  #site-header {
    transition: transform 0.35s ease, opacity 0.35s ease;
  }
  #site-header.hero-active {
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
  }

/* SP: ヒーロー表示中もヘッダー（メニュー）を常に表示 */
@media screen and (max-width: 768px) {
  #site-header.hero-active {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }
}
/*} */