/* ========================================
   Header
   ※ 既存デザインを維持したまま整理
======================================== */

/* ========================================
   Site Variables
======================================== */

:root {
  --blue: #8bd2ec;
  --blue-light: #e4f7fc;
  --blue-dark: #159fd1;
  --cream: #fffdf3;
  --green: #cde8d2;
  --green-dark: #63c58a;
  --pink: #f2a9bb;
  --text: #3f4a4d;

  /* サイト共通のコンテンツ幅 */
  --content-width: 1100px;
}

/* ========================================
   Header
======================================== */

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: transparent;
  box-shadow: none;
}

.header-inner {
  position: relative;
  z-index: 10;
  width: min(1200px, calc(100% - 50px));
  margin: 0 auto;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

/* ========================================
   Header Background
======================================== */

.header-bg {
    position: absolute;
    top: 0;
    left: 50%;
    width: 100vw;
    height: 298px;
    transform: translateX(-50%);
    overflow: hidden;
    pointer-events: none;
    z-index: 5;
}

.header-bg-center,
.header-bg-side {
  position: absolute;
  top: 0;
  width: 1197px;
  height: 298px;
  background-image: url("../images/index/header-bg.png");
  background-repeat: no-repeat;
  background-size: 1198px 298px;
  background-position: left top;
}

.header-bg-center {
  left: 50%;
  transform: translateX(-50%);
}

.header-bg-left {
  right: calc(50% + 598px);
  transform: scaleX(-1);
  transform-origin: center top;
}

.header-bg-right {
  left: calc(50% + 597px);
  transform: scaleX(-1);
  transform-origin: center top;
}

/* ========================================
   Balloon
======================================== */

.hero-balloon {
    position: absolute;
    top: 130px;
    right: 6%;
    width: 200px;
    z-index: 100;
    pointer-events: auto;
}

.hero-balloon img {
    display: block;
    width: 100%;
    height: auto;
}


/* カーソルを合わせたとき */
.hero-balloon:hover img {
    animation: balloon-float .8s ease-in-out;
}


@keyframes balloon-float {
    0% {
        transform: translateY(0) rotate(0deg);
    }

    30% {
        transform: translateY(-10px) rotate(2deg);
    }

    60% {
        transform: translateY(2px) rotate(-2deg);
    }

    100% {
        transform: translateY(0) rotate(0deg);
    }
}

/* ========================================
   Logo
======================================== */

.logo {
  display: block;
  width: 300px;
  flex: 0 0 auto;
}

.logo img {
  display: block;
  width: 100%;
  height: auto;
}

/* ========================================
   Navigation
======================================== */

.main-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(14px, 2vw, 25px);
}

.main-nav a {
  color: var(--text);
  text-align: center;
  font-size: 17px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}

.main-nav a img {
  display: block;
  width: 45px;
  margin: 0 auto;
  transition: transform .25s ease;
}

.main-nav a:hover img {
  transform: scale(1.15);
}

.main-nav a:hover {
  color: var(--blue-dark);
}

.instagram-link {
  color: #d37d9c !important;
}

/* ========================================
   Mobile Menu
======================================== */

.menu-button {
  display: none;
  width: 46px;
  height: 46px;
  padding: 9px;
  border: 0;
  border-radius: 50%;
  background: var(--blue-dark);
  cursor: pointer;
}

.menu-button span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 5px auto;
  background: #fff;
  transition: transform .25s, opacity .25s;
}

.mobile-menu {
  display: none;
}

/* ========================================
   Header Responsive
======================================== */