/* =========================================================
   Edge Talent Works - ヘッダー
========================================================= */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--space-m) var(--space-sm);
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--teal-100);
  transition: padding 0.5s ease, box-shadow 0.5s ease;
}

.header.scrolled {
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.header-inner {
  max-width: var(--max-width-2xl);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ロゴ */
.header-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: opacity 0.3s;
}

.header-logo:hover {
  opacity: 0.8;
}

.header-logo-title {
  font-size: 18px;
  margin-bottom: 3px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--main-teal);
  font-family: var(--font-family-serif);
}

.header-logo-sub {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.7;
  color: var(--color-black);
}

@media (min-width: 768px) {
  .header-logo-title {
    font-size: 20px;
  }

  .header {
    padding: var(--space-m);
  }
}

/* PCナビゲーション */
.header-nav {
  display: none;
}

@media (min-width: 768px) {
  .header-nav {
    display: flex;
    align-items: center;
    gap: 40px;
  }

  .header-nav a {
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-decoration: none;
    color: var(--color-black);
  }

  .header-nav .header-contact-btn {
    background-color: var(--sub-mint);
    color: var(--color-white);
    padding: 12px 24px;
    border-radius: 50px;
    transition: background-color 0.3s;
  }

  .header-nav .header-contact-btn:hover {
    background-color: var(--main-teal);
  }
}

/* ハンバーガーボタン */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  
  padding: 10px;
  border: none;
  background: transparent;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--main-teal);
  margin: 3px 0;
  transition: transform 0.3s, opacity 0.3s;
}

.hamburger.is-active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.is-active span:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

@media (min-width: 768px) {
  .hamburger {
    display: none;
  }
}

/* SPメニューオーバーレイ */
.menu-overlay {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--teal-100);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.menu-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.menu-overlay .menu-nav {
  padding: var(--space-m);
  display: flex;
  flex-direction: column;
  gap: var(--space-m);
}

.menu-overlay .menu-nav a {
  display: block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--main-teal);
  text-decoration: none;
}

.menu-overlay .menu-nav .header-contact-btn {
  text-align: center;
  background-color: var(--sub-mint);
  color: var(--color-white);
  padding: 12px 24px;
  border-radius: 50px;
}

@media (min-width: 768px) {
  .menu-overlay {
    display: none;
  }
}