/* --- 全体のスタイル --- */
html {
    font-size: 16px;
    line-height: 1.7;
    color: #333;
    background: #f8f9fa;
}

body {
    font-family: 'Segoe UI', 'ヒラギノ角ゴ ProN', 'メイリオ', sans-serif;
    max-width: 900px;
    margin: auto;
    padding: 30px;
    background: #ffffff;
    border-radius: 5px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}


/* --- ヘッダー --- */
header {
    text-align: center;
    padding: 5px 0;
    background: #2c569b/*#225ebf*/;
    color: white;
    border-radius: 5px;
    border-left: 2px solid #2c569b/*#225ebf*/;
    border-right: 2px solid #2c569b/*#225ebf*/;
}

h1.title {
    font-size: 2em;
    margin:5px 0 5px;
    padding:10px;
    background:white;
    color:#2c569b/*#1954b3*/;
    font-weight: bold;
}

header p{
    display: flex;
    font-size: 1.2em;
    justify-content: center;
    padding:0;
    color: #fff;
    margin:0;    		
    font-weight:normal;
}

.date {
    font-size: 0.9em;
    font-weight:lighter;            
}

/* --- セクション --- */
section {
    margin: 15px 0;
    padding: 5px 20px;
    background: #f5f5f5;
    border-left: 5px solid #2c569b/*#6e89b4*/;
    border-radius: 5px;
}

/* --- 見出し --- */
h2 {
    font-size: 1.6em;
    color: #fff;
    background:#2c569b;
    padding-left:10px;
    margin-bottom: 15px;
    border-radius: 5px;
}

h3 {
    margin-top:25px;
    margin-left:5px;
    color:#2c569b;
    border-bottom: 2px solid #2c569b;
    font-size: 1.3em;
    padding-left:10px;
}

h4 {
    margin-top:15px;
    margin-left:5px;
    color:#2c569b;
    border-bottom: 1px solid #2c569b;
    font-size: 1.2em;
    padding-left:10px;
}
h5 {
    margin-top:10px;
    margin-left:5px;
    color:#2c569b;
    font-size: 1.1em;
    padding-left:10px;
    margin-bottom:0;
    padding-bottom:0;
}
/* --- 段落 --- */       
p{
text-indent:1em;
margin-left:5px;
padding-left:5px;
}

/* --- リスト --- */     
section ul,dl {
list-style-type: none;
margin:1em 1em 1em 1em;
padding: 1em;
border: 2px solid #6e89b4;
border-radius: 5px;
background-color: #f8f8f8;
}


section ul li {
position: relative;
padding: .3em .3em .3em 1.5em;
}
section dl dt {
position: relative;
padding: .3em .3em .3em 1.5em;
}
section dl dt{color:#2c569b}

section ol li {
position: relative;
padding: .3em .3em .3em 1.5em;
}

section ul li::before {
position: absolute;
left: 0;
top: 0.7em;
display: inline-block;
width: 10px;
height: 5px;
border-bottom: 2px solid #2c569b;
border-left: 2px solid #2c569b;
transform: rotate(-45deg);
content: '';
}

/* --- リンク --- */
a {
    color: #2f5cb6;
    text-decoration: none;
    font-weight: bold;
}

a:hover {
    color: #ee9c3f; 
    font-weight:bold;
}

a:visited{
	color:#ee9c3f;
    font-weight:bold;
}

/* --- 画像と図 --- */
img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

figure {
    text-align: center;
    margin: 20px 0;
}

figcaption,caption {
    font-size: 0.9em;
    color:#2c569b;
}

/* --- ボタン --- */
.btn {
    display: inline-block;
    padding: 8px 16px;
    background: #9dbbec;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background 0.3s ease;
}
.btn:hover {
    color: #333; 
    font-weight:bold;
    background: #9dbbec;
}

/* --- フッター --- */
footer {
    text-align: center;
    padding: 5px;
    background: #2c569b;
    color: white;
    margin-top: 5px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    flex-direction: column;
}

footer p {font-size: 1.2em;
    font-weight: normal;
    margin:0;
}

.footer_list {
display: flex;
justify-content: center;
align-items: center;
gap: 0 1.5em;
list-style-type: none;
margin: 0 0 .5em;
padding: .5em; 
}

.footer_link {
display: inline-block;
padding: 6px 12px;
background: #000;
color: white;
font-weight: 200;
text-decoration: none;            
transition: background 0.3s ease;
}

.footer_copyright {
margin: 0;
color: #ffffffb3;
font-weight:lighter;
font-size: .8em;
}

.footer_list li{
background:#8991a4;
display:block;
padding: 8px;
border-radius: 4px;    
margin:0;
}

/* --- テーブル --- */
table {
width: 100%;
border-collapse: collapse;
margin: 20px 5px;

}

th, td {
border: 1px solid #ddd;
padding: 8px;
text-align: left;
}

th {
background-color: #2c569b;
color: white;
}

tr:nth-child(odd) {
background-color: #f8f8f8;
}    
tr:nth-child(even) {
background-color: #f5f5f5;
}

.screen {
background: #f8f8f8;
border: 1px solid #ddd;
padding: 5px;
margin: 5px 5px 5px 0;
border-radius: 5px;
}

.pages{display:flex;
justify-content: center;
}
.minipage{margin:5px;}

.important{color:blue;}