/* ----------------------------------------------------
           基本設定 / 変数
           ---------------------------------------------------- */
      :root {
        --primary: #5d4037; /* 柔らかいダークブラウン */
        --accent: #ffab91; /* 優しげなサーモンピンク */
        --accent-hover: #ff8a65;
        --secondary: #fff3e0; /* 背景用の薄いオレンジベージュ */
        --bg-light: #fffbf0; /* アイボリー */
        --font-main: "M PLUS Rounded 1c", sans-serif;
        --font-en: "Montserrat", sans-serif;
      }

      body {
        margin: 0;
        padding: 0;
        font-family: var(--font-main);
        background-color: var(--bg-light);
        color: var(--primary);
        overflow: hidden; /* コンテンツがFVだけなのでスクロールさせない */
        -webkit-font-smoothing: antialiased;
      }

      h1,
      h2,
      h3 {
        font-family: var(--font-main);
        letter-spacing: 0.05em;
      }

      /* ----------------------------------------------------
           オープニングアニメーション (カーテン)
           ---------------------------------------------------- */
      #opening-curtain {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: #ffffff;
        z-index: 9999;
        display: flex;
        justify-content: center;
        align-items: center;
        flex-direction: column;
        background-image: radial-gradient(var(--secondary) 20%, transparent 20%),
          radial-gradient(var(--secondary) 20%, transparent 20%);
        background-size: 20px 20px;
        background-position: 0 0, 10px 10px;
      }

      .animation-wrapper {
        position: relative;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
      }

      /* アイコン表示エリア */
      .icon-stage {
        position: relative;
        width: 120px;
        height: 120px;
        display: flex;
        justify-content: center;
        align-items: center;
        margin-bottom: 20px;
        background: #fff;
        border-radius: 50%;
        box-shadow: 0 8px 20px rgba(255, 171, 145, 0.3);
      }

      /* 切り替わるアイコンたち */
      .anim-icon {
        position: absolute;
        font-size: 3.5rem;
        color: var(--accent);
        opacity: 0;
      }

      .final-icon {
        color: var(--primary);
      }

      /* ロゴ部分 */
      .brand-logo {
        text-align: center;
        opacity: 0;
        transform: translateY(20px);
      }

      .brand-logo h1 {
        font-size: 2.8rem;
        font-weight: 800;
        margin: 0;
        line-height: 1;
        color: var(--primary);
        font-family: var(--font-en);
      }

      .brand-logo p {
        font-size: 1rem;
        font-weight: 700;
        margin-top: 10px;
        color: var(--accent);
        letter-spacing: 0.2em;
      }

      /* ----------------------------------------------------
           ヘッダー
           ---------------------------------------------------- */
      header {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        padding: 20px 40px;
        box-sizing: border-box;
        display: flex;
        justify-content: space-between;
        align-items: center;
        z-index: 100;
      }

      .header-logo {
        font-family: var(--font-en);
        font-weight: 800;
        font-size: 1.6rem;
        color: var(--primary);
        text-decoration: none;
        display: flex;
        align-items: center;
        gap: 10px;
        background: rgba(255, 255, 255, 0.9);
        padding: 8px 20px;
        border-radius: 30px;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
      }

      .header-logo span {
        color: var(--accent);
      }

      nav ul {
        display: flex;
        list-style: none;
        gap: 20px;
        margin: 0;
        padding: 0;
      }

      nav a {
        text-decoration: none;
        color: var(--primary);
        font-weight: 700;
        font-size: 0.95rem;
        padding: 8px 16px;
        border-radius: 20px;
        transition: all 0.3s;
        background: rgba(255, 255, 255, 0.8);
      }

      nav a:hover {
        background-color: var(--accent);
        color: #fff;
        transform: translateY(-2px);
      }

      /* ----------------------------------------------------
           ヒーローセクション (FV)
           ---------------------------------------------------- */
      .hero {
        position: relative;
        height: 100vh;
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        background-image: url("https://images.unsplash.com/photo-1496171367470-9ed9a91ea931?q=80&w=2070&auto=format&fit=crop");
        background-size: cover;
        background-position: center;
        overflow: hidden;
      }

      /* オーバーレイ */
      .hero::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(255, 251, 240, 0.4);
        z-index: 1;
      }

      .hero-content {
        position: relative;
        z-index: 2;
        text-align: center;
        color: var(--primary);
        max-width: 800px;
        padding: 60px; /* FVのみなので少し余裕を持たせる */
        background: rgba(255, 255, 255, 0.85);
        border-radius: 40px;
        box-shadow: 0 10px 40px rgba(93, 64, 55, 0.15);
        backdrop-filter: blur(5px);
      }

      .hero-title {
        font-size: 4rem;
        font-weight: 800;
        margin: 0 0 30px 0;
        line-height: 1.2;
        font-family: var(--font-en);
        color: var(--primary);
      }

      .btn-main {
        display: inline-block;
        padding: 18px 60px;
        background-color: var(--accent);
        color: #fff;
        text-decoration: none;
        font-family: var(--font-en);
        font-weight: 700;
        font-size: 1.2rem;
        border-radius: 50px;
        letter-spacing: 0.1em;
        transition: all 0.3s;
        box-shadow: 0 6px 15px rgba(255, 171, 145, 0.4);
        border: 3px solid white;
      }

      .btn-main:hover {
        transform: scale(1.05) rotate(-2deg);
        background-color: var(--accent-hover);
        box-shadow: 0 8px 20px rgba(255, 171, 145, 0.6);
      }

      /* レスポンシブ */
      @media (max-width: 768px) {
        .hero-title {
          font-size: 3rem;
        }
        .hero-content {
          padding: 40px 20px;
          margin: 0 20px;
          width: 90%;
        }
        nav {
          display: none;
        }
      }