:root {
    --main-blue: #0070bb;
    --dark-blue: #001f3f;
    --stats-bg: #2c2e3b;
    --text-color: #333;
    --header-height: 80px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Noto Sans JP', sans-serif; color: var(--text-color); line-height: 1.8; overflow-x: hidden; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* ヘッダー */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    z-index: 1000;
    display: flex;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1720px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo img {
    height: 64px;      /* ヘッダー高さに合わせる */
    width: auto;
    display: block;    /* 余計な隙間防止 */
}


.nav ul { display: flex; list-style: none; gap: 30px; }
.nav a { text-decoration: none; color: var(--text-color); font-size: 0.95rem; font-weight: 500; transition: 0.3s; }
.nav a:hover { color: var(--main-blue); }

/* PCではボタンを隠す */
.hamburger { display: none; }

/* MV */
.mv {
    position: relative;
    width: 100%;
    height: 100vh;
    background: radial-gradient(circle at center, #0056b3 0%, var(--dark-blue) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

#particles-js { position: absolute; width: 100%; height: 100%; top: 0; left: 0; }
.mv-content { position: relative; z-index: 10; text-align: center; color: white; }
.mv-content h1 { font-size: clamp(1.6rem, 6vw, 4rem); letter-spacing: 0.2em; }

/* Business Section */
.section-business { padding: 120px 0; }
.section-title { font-family: 'Exo 2', sans-serif; font-size: 2.5rem; margin-bottom: 50px; border-bottom: 1px solid #eee; }
.business-flex { display: flex; align-items: center; gap: 50px; }
.business-text { flex: 1; }
.business-text h3 {
  margin-bottom: 24px;
}
.business-image-box {
    position: relative;
    flex: 1.2;
    height: 350px;
    border-radius: 8px;
    overflow: hidden;
    background: #4e5467;
}

.business-image-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 青グレーの色味をかぶせる */
.business-image-box::after {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(63, 72, 92, 0.45); /* 青グレー */
    mix-blend-mode: multiply;
}

/* Stats Section */
.stats-intro { font-family: 'Exo 2', sans-serif; font-size: 2rem; }
.section-stats { background: var(--stats-bg); color: rgb(255, 255, 255); padding: 100px 0; text-align: center; }
.stats-grid { display: flex; gap: 2px; background: #444; margin-top: 40px; }
.stat-card { background: white; color: #333; flex: 1; padding: 60px 20px; }
.stat-value { font-size: 2.5rem; font-weight: bold; color: var(--main-blue); }

/* SNS Section */
.sns-section { padding: 60px 0; background: #f8f9fa; }
.sns-grid { display: flex; gap: 120px; justify-content: center; }
.sns-link {
    flex: 1; background: white; padding: 20px; text-align: center; text-decoration: none; color: #333;
    border: 1px solid #ddd; display: flex; align-items: center; justify-content: center; gap: 10px; transition: 0.3s;
}
.sns-link i { font-size: 1.5rem; }

/* Contact & Buttons */
.contact-blue { background: var(--main-blue); color: white; padding: 80px 0; text-align: center; }
.line-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;

    margin-top: 20px;
    padding-bottom: 6px;   /* ← 線との余白 */
    
    color: white;
    text-decoration: none;
    border-bottom: 1px solid white;
}

.casual-section {
    position: relative;
    color: white;
    padding: 80px 0;
    text-align: center;

    background-image: url("casual.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}
.casual-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(23, 27, 35, 0.7);
}
.casual-section .container {
    position: relative;
    z-index: 1;

}

.filled-btn {
    display: inline-flex;
    align-items: center;
    gap: 15px;

    background: var(--main-blue);
    color: white;
    text-decoration: none;
    padding: 15px 50px;
    border-radius: 4px;
    margin-top: 20px;
    font-weight: bold;
}

.footer { padding: 40px; text-align: center; background: #fff; font-size: 0.8rem; color: #aaa; }

/* レスポンシブ (スマホ対応) */
@media (max-width: 768px) {
    .header-inner { padding: 0 15px; }

    /* MV高さを900pxに指定 */
    .mv { height: 870px; }

    /* ハンバーガーボタン表示 */
    .hamburger {
        display: block;
        position: relative;
        width: 30px;
        height: 24px;
        z-index: 1100;
        cursor: pointer;
    }

    .hamburger span {
        display: block;
        position: absolute;
        width: 100%;
        height: 2px;
        background-color: var(--dark-blue);
        transition: 0.4s;
    }

    .hamburger span:nth-child(1) { top: 0; }
    .hamburger span:nth-child(2) { top: 11px; }
    .hamburger span:nth-child(3) { bottom: 0; }

    /* 活性化時の「×」アニメーション */
    .hamburger.is-active span:nth-child(1) { transform: translateY(11px) rotate(45deg); }
    .hamburger.is-active span:nth-child(2) { opacity: 0; }
    .hamburger.is-active span:nth-child(3) { transform: translateY(-11px) rotate(-45deg); }

    /* スマホ用メニュー（右からスライド） */
    .nav {
        display: block;
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: #fff;
        z-index: 1050;
        transition: 0.5s;
        padding-top: 100px;
    }

    .nav.is-active { right: 0; }
    .nav ul { flex-direction: column; align-items: center; gap: 40px; }
    .nav a { font-size: 1.2rem; }

    /* Businessセクション：画像を維持 */
    .business-flex { flex-direction: column; gap: 30px; }
      .business-image-box {
    height: 220px;
  }

    
    .stats-grid { flex-direction: column; }
    .sns-text { display: none; }
    .sns-link { padding: 20px 0; }
    .sns-grid { display: flex; gap: 20px; justify-content: center; }
    .sns-link i { font-size: 2rem; } 
}