/* Shared header styles for all pages */
.header {
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid #e0e0e0;
    backdrop-filter: blur(10px);
    padding: 20px 40px;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1200;
    transition: all 0.3s ease;
}

.header.transparent {
    background: rgba(255, 255, 255, 0);
    border-bottom: 1px solid transparent;
    backdrop-filter: none;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid #e0e0e0;
    backdrop-filter: blur(10px);
}

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

.logo {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
    text-decoration: none;
    color: #1a1a1a;
    transition: color 0.3s ease;
    display: block;
    z-index: 1002;
    position: relative;
}

.header.transparent .logo {
    color: #fff;
}

.header.scrolled .logo {
    color: #1a1a1a;
}

.logo:hover {
    color: #666;
}

.header.transparent .logo:hover {
    color: #ccc;
}

.header.scrolled .logo:hover {
    color: #666;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
    z-index: 2000;
}

.nav-links a {
    color: #1a1a1a;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.header.transparent .nav-links a {
    color: #fff;
}

.header.scrolled .nav-links a {
    color: #1a1a1a;
}

.nav-links a:hover {
    color: #666;
}

.header.transparent .nav-links a:hover {
    color: #ccc;
}

.header.scrolled .nav-links a:hover {
    color: #666;
}

.login-btn {
    padding: 8px 20px;
    background: #fff;
    border: 2px solid #1a1a1a;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    color: #1a1a1a;
}

.header.transparent .login-btn {
    background: transparent;
    border: 2px solid #fff;
    color: #fff;
}

.header.scrolled .login-btn {
    background: #fff;
    border: 2px solid #1a1a1a;
    color: #1a1a1a;
}

.login-btn:hover {
    background: #1a1a1a;
    color: #fff;
}

.header.transparent .login-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.header.scrolled .login-btn:hover {
    background: #1a1a1a;
    color: #fff;
}

.language-dropdown {
    position: relative;
}

.language-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    color: #1a1a1a;
    font-weight: 500;
}

.header.transparent .language-btn {
    color: #fff;
}

.header.scrolled .language-btn {
    color: #1a1a1a;
}

.language-btn:hover {
    color: #666;
}

.header.transparent .language-btn:hover {
    color: #ccc;
}

.header.scrolled .language-btn:hover {
    color: #666;
}

.language-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    min-width: 120px;
    z-index: 1001;
    display: none;
}

.language-dropdown.open .language-menu {
    display: block;
}

.language-menu a {
    display: block !important;
    padding: 10px 15px;
    color: #1a1a1a;
    text-decoration: none;
    font-size: 14px;
    transition: background-color 0.3s ease;
    border-bottom: 1px solid #f0f0f0;
}

.language-menu a:last-child {
    border-bottom: none;
}

.language-menu a:hover {
    background-color: #f5f5f5;
    color: #1a1a1a;
}

.language-menu a.active {
    background-color: #f0f0f0;
    font-weight: 600;
}

.user-name {
    color: #1a1a1a;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.user-name:hover {
    color: #666;
}

.admin-dropdown {
    position: relative;
    display: inline-block;
}

.admin-dropdown-btn {
    background: transparent !important;
    border: 2px solid #1a1a1a !important;
    border-radius: 4px !important;
    padding: 8px 16px !important;
    font-size: 14px !important;
    font-weight: 600 !important;
    letter-spacing: 0.5px !important;
    color: #1a1a1a !important;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: none !important;
}

.header.transparent .admin-dropdown-btn {
    background: transparent !important;
    border: 2px solid #fff !important;
    color: #fff !important;
}

.header.scrolled .admin-dropdown-btn {
    background: transparent !important;
    border: 2px solid #1a1a1a !important;
    color: #1a1a1a !important;
}

.admin-dropdown-btn:hover {
    background: #1a1a1a !important;
    color: #fff !important;
}

.header.transparent .admin-dropdown-btn:hover {
    background: #fff !important;
    color: #1a1a1a !important;
}

.header.scrolled .admin-dropdown-btn:hover {
    background: #1a1a1a !important;
    color: #fff !important;
}

.admin-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    min-width: 180px;
    z-index: 1001;
    display: none;
}

.admin-dropdown.open .admin-dropdown-menu {
    display: block;
}

.admin-dropdown-menu a {
    display: block !important;
    padding: 12px 16px;
    color: #1a1a1a !important;
    text-decoration: none;
    font-size: 14px;
    transition: background-color 0.3s ease;
    border-bottom: 1px solid #f0f0f0;
}

.admin-dropdown-menu a:last-child {
    border-bottom: none;
}

.admin-dropdown-menu a:hover {
    background-color: #f5f5f5;
    color: #1a1a1a !important;
}

.admin-dropdown-menu form {
    margin: 0;
    padding: 0;
}

.admin-dropdown-menu .dropdown-logout-btn {
    display: block;
    width: 100%;
    padding: 12px 16px;
    color: #1a1a1a !important;
    text-decoration: none;
    font-size: 14px;
    transition: background-color 0.3s ease;
    border: none;
    background: none;
    text-align: left;
    cursor: pointer;
    font-weight: 500;
}

.admin-dropdown-menu .dropdown-logout-btn:hover {
    background-color: #f5f5f5;
    color: #1a1a1a !important;
}

.hamburger-btn {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.hamburger-btn span {
    width: 100%;
    height: 3px;
    background-color: #1a1a1a;
    transition: all 0.3s ease;
    transform-origin: center;
}

.header.transparent .hamburger-btn span {
    background-color: #fff;
}

.header.scrolled .hamburger-btn span {
    background-color: #1a1a1a;
}

.hamburger-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

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

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

/* Offset the fixed header */
.page-with-header {
    padding-top: 110px;
}

@media (max-width: 768px) {
    .page-with-header {
        padding-top: 90px;
    }

    .hamburger-btn {
        display: flex;
        z-index: 2001;
    }

    .header.scrolled,
    .header.menu-open {
        background: rgba(255, 255, 255, 0.98) !important;
        border-bottom: 1px solid #e0e0e0 !important;
    }

    .header.menu-open .logo {
        color: #1a1a1a !important;
    }

    .header.menu-open .hamburger-btn span {
        background-color: #1a1a1a !important;
    }

    .nav-links {
        display: none;
        position: fixed;
        inset: 0;
        height: 100vh;
        width: 100vw;
        background: #fff;
        flex-direction: column;
        padding: 100px 40px 28px; /* match header horizontal padding */
        z-index: 1000; /* ヘッダーより下にしてロゴを隠さない */
        overflow-y: auto;
        align-items: flex-start;
        gap: 12px;
    }

    .nav-links.show {
        display: flex;
    }

    body.menu-open {
        overflow: hidden;
    }

    .nav-links > * {
        margin: 0;
        padding: 0;
        width: 100%;
        display: block;
    }

    .nav-links > a {
        padding: 14px 0;
        font-size: 15px;
        color: #111 !important;
        text-decoration: none;
        transition: color 0.2s ease;
        display: block;
        font-weight: 600;
        border-bottom: 1px solid #e5e5e5;
    }

    .nav-links > a:hover {
        color: #111 !important;
    }

    .nav-links > .user-name {
        padding: 14px 0;
        background-color: transparent;
        font-weight: 700;
        color: #111;
        order: 1;
        font-size: 15px;
        border-bottom: 1px solid #e5e5e5;
    }

    .nav-links > .language-dropdown {
        order: 4;
    }

    .language-btn {
        width: 100%;
        padding: 14px 0;
        text-align: left;
        font-size: 15px;
        color: #111 !important;
        font-weight: 600;
        gap: 8px;
        border: none;
        border-bottom: 1px solid #e5e5e5;
        background: transparent;
    }

    .language-btn:hover {
        color: #111 !important;
    }

    .language-menu {
        position: static;
        background: transparent;
        border: none;
        box-shadow: none;
        padding: 0;
        display: none;
        width: 100%;
    }

    .language-dropdown.open .language-menu {
        display: block;
    }

    .language-menu a {
        padding: 12px 0;
        color: #333 !important;
        font-size: 14px;
        font-weight: 500;
        display: block;
        border-bottom: 1px solid #e5e5e5;
    }

    .language-menu a:last-child {
        border-bottom: none;
    }

    .language-menu a:hover {
        color: #111 !important;
    }

    .language-menu a.active {
        color: #111 !important;
        font-weight: 600;
    }

    .nav-links > .admin-dropdown {
        order: 3;
    }

    .admin-dropdown-btn {
        width: 100%;
        padding: 14px 0;
        text-align: left;
        background: transparent;
        border: none;
        font-size: 15px;
        color: #111 !important;
        cursor: pointer;
        font-weight: 600;
        display: flex;
        align-items: center;
        gap: 8px;
        border-bottom: 1px solid #e5e5e5;
    }

    .admin-dropdown-btn:hover {
        color: #111 !important;
    }

    .admin-dropdown-menu {
        position: static;
        background: transparent;
        border: none;
        box-shadow: none;
        display: none;
        padding: 0;
        width: 100%;
    }

    .admin-dropdown.open .admin-dropdown-menu {
        display: block;
    }

    .admin-dropdown-menu a {
        padding: 12px 0;
        color: #333 !important;
        font-size: 14px;
        background: none;
        font-weight: 500;
        display: block;
        border-bottom: 1px solid #e5e5e5;
    }

    .admin-dropdown-menu a:last-child {
        border-bottom: none;
    }

    .admin-dropdown-menu a:hover {
        color: #111 !important;
    }

    .nav-links > .login-btn {
        margin: 0;
        text-align: left;
        padding: 14px 0;
        font-size: 15px;
        font-weight: 600;
        border: none;
        background: transparent;
        color: #111 !important;
        text-decoration: none;
        transition: color 0.2s ease;
        display: block;
        order: 5;
        border-bottom: 1px solid #e5e5e5;
    }

    .nav-links > .login-btn:hover {
        color: #111 !important;
    }

    .nav-links > form {
        order: 5;
        margin: 0;
        padding: 0;
        border-bottom: none;
        width: 100%;
    }

    .nav-links > form .login-btn {
        margin: 0;
        width: 100%;
        color: #111 !important;
        padding: 14px 0;
        text-align: left;
        font-weight: 600;
        border: none;
        border-bottom: 1px solid #e5e5e5;
        background: transparent;
    }
}