/* 
   Tecogonaz Style Sheets
   Inspired by Hiroshi Abe's Homepage (Web Standards Compliant)
*/

/* Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: #ffffff;
    color: #000000;
    font-family: "MS PGothic", "MS Pゴシック", "Hiragino Kaku Gothic ProN", "ヒラギノ角ゴ ProN W3", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.4;
}

/* Hyperlinks */
a {
    color: #0000ff;
    text-decoration: underline;
}

a:visited {
    color: #800080;
}

a:active {
    color: #ff0000;
}

/* Layout - CSS Flexbox mimicking 90s Frames */
.layout-container {
    display: flex;
    min-height: 100vh;
}

/* Left Sidebar (Navigation Frame style) */
.sidebar {
    width: 220px;
    padding: 20px;
    border-right: 3px double #808080;
    background-color: #f0f0f0;
}

.site-title {
    font-size: 24px;
    margin-bottom: 20px;
    font-weight: bold;
}

.site-title a {
    text-decoration: none;
    color: #000000;
}

.site-title a:visited {
    color: #000000;
}

.nav-menu ul {
    list-style-type: none;
}

.nav-menu li {
    margin-bottom: 12px;
}

.nav-menu a {
    font-size: 16px;
    font-weight: bold;
}

/* Right Content Area */
.content {
    flex: 1;
    padding: 25px 40px;
    background-color: #ffffff;
}

/* Section elements */
.welcome-section h2 {
    font-size: 22px;
    margin-bottom: 10px;
}

.content-section {
    margin-top: 30px;
}

.content-section h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #000000;
}

p {
    font-size: 16px;
    margin-bottom: 15px;
}

hr {
    margin: 20px 0;
    border: 0;
    border-top: 2px solid #808080;
}

/* Responsive adjustment for Mobile viewports (Web Standard Compliant) */
@media (max-width: 600px) {
    .layout-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 3px double #808080;
        text-align: center;
        padding: 15px;
    }
    
    .nav-menu ul {
        display: flex;
        justify-content: center;
        gap: 15px;
    }
    
    .nav-menu li {
        margin-bottom: 0;
    }
    
    .content {
        padding: 20px;
    }
}