/* 共通スタイル - ヘッダー、フッター、基本レイアウト */

/* ヘッダースタイル */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.site-main {
    padding-top: 120px;
    min-height: calc(100vh - 300px);
}

.header-main {
    padding: var(--spacing-md) 0;
}

.header-main .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo img {
    height: 84px;
    width: auto;
}

.main-nav {
    flex: 1;
    margin-left: var(--spacing-3xl);
}

.main-nav ul {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    margin: 0;
    padding: 0;
    list-style: none;
    justify-content: space-between;
}

.main-nav ul li:nth-last-child(2),
.main-nav ul li:last-child {
    margin-left: 0;
}

.main-nav ul li:nth-last-child(2) {
    margin-left: auto;
}

.main-nav a {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    transition: color 0.3s;
    padding: var(--spacing-sm) 0;
}

.main-nav a:hover,
.main-nav .current a {
    color: #ffffff;
}

.main-nav .btn-entry {
    background: linear-gradient(135deg, #8bc34a 0%, #7cb342 100%);
    padding: var(--spacing-sm) var(--spacing-xl);
    border-radius: var(--radius-md);
    border: none;
    color: #ffffff !important;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(139, 195, 74, 0.3);
    transition: all 0.3s ease;
    margin-right: var(--spacing-xs);
}

.main-nav .btn-entry:hover {
    background: linear-gradient(135deg, #7cb342 0%, #689f38 100%);
    box-shadow: 0 4px 12px rgba(139, 195, 74, 0.5);
    transform: translateY(-2px);
}

.main-nav .btn-login {
    background: linear-gradient(135deg, #ff9800 0%, #ff6b00 100%);
    padding: var(--spacing-sm) var(--spacing-xl);
    border-radius: var(--radius-md);
    border: none;
    color: #ffffff !important;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(255, 152, 0, 0.3);
    transition: all 0.3s ease;
}

.main-nav .btn-login:hover {
    background: linear-gradient(135deg, #ff6b00 0%, #ff5500 100%);
    box-shadow: 0 4px 12px rgba(255, 152, 0, 0.5);
    transform: translateY(-2px);
}

.mobile-menu-toggle {
    display: none;
}

/* スクロール時のヘッダー縮小 */
.site-header.is-scrolled {
    padding: 0;
    background: rgba(74, 155, 62, 0.98);
    backdrop-filter: blur(10px);
}

.site-header.is-scrolled .logo img {
    height: 56px;
}

/* モバイル対応 */
@media (max-width: 768px) {
    .site-main {
        padding-top: 80px;
    }
    
    .header-main {
        padding: var(--spacing-sm) 0;
    }
    
    .logo img {
        height: 42px !important;
    }
    
    .mobile-menu-toggle {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        width: 30px;
        height: 24px;
        background: none;
        border: none;
        cursor: pointer;
        z-index: 1001;
    }
    
    .mobile-menu-toggle span {
        display: block;
        height: 3px;
        background: #ffffff;
        border-radius: 2px;
        transition: all 0.3s;
    }
    
    .mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }
    
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.2);
        transition: right 0.3s ease;
        margin-left: 0;
        padding-top: 80px;
        overflow-y: auto;
    }
    
    .main-nav.is-open {
        right: 0;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-lg);
    }
    
    .main-nav li {
        width: 100%;
    }
    
    .main-nav a {
        display: block;
        padding: var(--spacing-md) var(--spacing-lg);
        color: #ffffff;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .main-nav a:hover {
        background: rgba(255, 255, 255, 0.1);
    }
    
    .main-nav .btn-entry,
    .main-nav .btn-login {
        text-align: center;
        margin-top: var(--spacing-sm);
    }
    
    body.menu-open {
        overflow: hidden;
    }
    
    body.menu-open::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }
}

/* セクション間の余白調整 */
section {
    scroll-margin-top: 100px;
}

@media (max-width: 768px) {
    section {
        scroll-margin-top: 80px;
    }
}