:root {
    /* トープ */
    --primary-color-1: #795548;
    --primary-color-2: #3e2723;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, var(--primary-color-1) 0%, var(--primary-color-2) 100%);
    min-height: 100vh;
}

/* ヘッダー */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.header-nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color-1);
    text-decoration: none;
    transition: color 0.3s ease;
}

.logo:hover {
    color: var(--primary-color-2);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-item a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-item a:hover {
    color: var(--primary-color-1);
}

.nav-item a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 50%;
    background: linear-gradient(90deg, var(--primary-color-1), var(--primary-color-2));
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-item a:hover::after {
    width: 100%;
}

/* ハンバーガーメニュー */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    border-radius: 3px;
    transition: all 0.3s ease;
}

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

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* メインコンテンツ */
main {
    max-width: 1200px;
    margin: 0 auto;
}
.main-content {
    padding: 8rem 2rem 4rem;
}
.page-title {
    text-align: center;
    margin-bottom: 3rem;
}

.page-title h1 {
    font-size: 3rem;
    font-weight: 700;
    color: white;
    background-clip: text;
    margin-bottom: 1rem;
}

/* 動画セクション */
.video-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.video-section:hover {
    transform: translateY(-5px);
}

.video-title {
    font-size: 2rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color-1) 0%, var(--primary-color-2) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.video-meta {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color-1) 0%, var(--primary-color-2) 100%);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 2rem;
}

.video-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #666;
    margin-bottom: 2rem;
}

.video-process {
    background: #f8f9ff;
    padding: 2rem;
    border-radius: 15px;
    margin: 2rem 0;
}

.process-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 1rem;
}

.process-list {
    list-style: none;
    counter-reset: process-counter;
}

.process-list li {
    counter-increment: process-counter;
    position: relative;
    padding: 0.5rem 0 0.5rem 3rem;
    margin-bottom: 0.5rem;
}

.process-list li::before {
    content: counter(process-counter);
    position: absolute;
    left: 0;
    top: 0.5rem;
    width: 2rem;
    height: 2rem;
    background: linear-gradient(135deg, var(--primary-color-1) 0%, var(--primary-color-2) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.video-wrapper {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    margin-top: 2rem;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* フッター */
.footer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    margin-top: 4rem;
    padding: 3rem 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 3rem;
    align-items: start;
}

.footer-icon {
    width: 120px;
    height: 120px;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--primary-color-1) 0%, var(--primary-color-2) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
    font-weight: bold;
}

.footer-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 1rem;
}

.footer-info p {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.8;
}

.sns-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.sns-link {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color-1) 0%, var(--primary-color-2) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.sns-link:hover {
    transform: scale(1.1);
}

.copyright {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid #eee;
    margin-top: 2rem;
    color: #666;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 2rem;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    }

    .nav-list.active {
        display: flex;
    }

    .hamburger {
        display: flex;
    }

    .main-content {
        /*padding: 6rem 1rem 2rem;*/
        padding: 6rem 0 2rem;

    }
    .main-content2 {
        padding: 6rem 1rem 2rem;
    }

    .page-title h1 {
        font-size: 2rem;
    }

    .video-section {
        padding: 2rem 1.5rem;
        /*padding: 2rem 0;*/
    }

    .video-title {
        font-size: 1.5rem;
    }

    .footer-content {
        grid-template-columns: 1fr; /* 1列にする */
        text-align: center; /* 全体を中央寄せ */
        gap: 1.5rem;
    }

    .footer-icon {
        margin: 0 auto; /* 中央寄せ */
        width: 100px;
        height: 100px;
        font-size: 2.5rem;
    }

    .footer-info h3 {
        font-size: 1.25rem;
    }

    .footer-info p {
        font-size: 0.95rem;
        line-height: 1.6;
    }

    .sns-links {
        display: flex;
        justify-content: center;
        gap: 1rem;
    }
}




}

@media (max-width: 480px) {
    .header-nav {
        padding: 1rem;
    }

    .video-section {
        padding: 1.5rem 1rem;
        /*padding: 1.5rem 0;*/
    }

    .video-meta {
        font-size: 1rem;
        padding: 0.4rem 1rem;
    }

    .video-description {
        font-size: 1rem;
    }

    .process-list li {
        padding-left: 2.5rem;
    }

    .process-list li::before {
        width: 1.5rem;
        height: 1.5rem;
        font-size: 0.8rem;
    }
}