/* Simple Black & White CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    line-height: 1.6;
    color: #000;
    background-color: #fff;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    background-color: #000;
    color: #fff;
    padding: 40px 0;
    text-align: center;
    border-bottom: 2px solid #000;
}

header h1 {
    font-size: 48px;
    margin-bottom: 10px;
}

header .subtitle {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

nav {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

nav a {
    color: #fff;
    text-decoration: none;
    padding: 8px 16px;
    border: 1px solid #fff;
    transition: all 0.2s;
}

nav a:hover {
    background-color: #fff;
    color: #000;
}

/* Warning Banner */
.warning-banner {
    background-color: #000;
    color: #fff;
    text-align: center;
    padding: 15px;
    font-weight: bold;
    font-size: 16px;
}

/* Sections */
section {
    padding: 60px 0;
    border-bottom: 1px solid #ddd;
}

section:last-of-type {
    border-bottom: none;
}

h2 {
    font-size: 32px;
    margin-bottom: 30px;
    padding-bottom: 10px;
    border-bottom: 2px solid #000;
}

h3 {
    font-size: 22px;
    margin-bottom: 15px;
}

p {
    margin-bottom: 15px;
}

/* Notice Box */
.notice {
    background-color: #f5f5f5;
    border: 2px solid #000;
    padding: 20px;
    margin-top: 30px;
}

.notice strong {
    display: block;
    margin-bottom: 10px;
    font-size: 18px;
}

.notice ul {
    list-style: none;
    padding-left: 0;
}

.notice li {
    padding: 5px 0;
    padding-left: 20px;
    position: relative;
}

.notice li:before {
    content: "•";
    position: absolute;
    left: 0;
}

/* Screenshot */
.screenshot-box {
    text-align: center;
    margin: 30px 0;
}

.screenshot-box img {
    max-width: 100%;
    height: auto;
    border: 2px solid #000;
    margin-bottom: 15px;
}

.caption {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.feature {
    border: 1px solid #000;
    padding: 25px;
    background-color: #fff;
}

.feature h3 {
    margin-top: 0;
}

.feature ul {
    list-style: none;
    padding-left: 0;
}

.feature li {
    padding: 5px 0;
    padding-left: 20px;
    position: relative;
}

.feature li:before {
    content: "•";
    position: absolute;
    left: 0;
}

/* Table */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
}

table td {
    padding: 15px;
    border: 1px solid #000;
}

table td:first-child {
    font-weight: bold;
    background-color: #f5f5f5;
    width: 30%;
}

/* Download Section */
.download-info {
    max-width: 700px;
    margin: 30px auto;
}

.download-info h3 {
    font-size: 28px;
    margin-bottom: 10px;
}

.buttons {
    display: flex;
    gap: 15px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.button {
    display: inline-block;
    padding: 15px 30px;
    text-decoration: none;
    border: 2px solid #000;
    color: #000;
    background-color: #fff;
    font-weight: bold;
    transition: all 0.2s;
}

.button:hover {
    background-color: #000;
    color: #fff;
}

.button.primary {
    background-color: #000;
    color: #fff;
}

.button.primary:hover {
    background-color: #fff;
    color: #000;
}

/* Steps */
.steps {
    margin-top: 40px;
    padding: 20px;
    border: 1px solid #000;
    background-color: #f9f9f9;
}

.steps h4 {
    margin-bottom: 15px;
    font-size: 18px;
}

.steps ol {
    padding-left: 20px;
}

.steps li {
    padding: 8px 0;
}

.steps code {
    background-color: #e0e0e0;
    padding: 2px 6px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
}

/* Links */
.links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.link-item {
    border: 1px solid #000;
    padding: 25px;
}

.link-item h3 {
    margin-top: 0;
    margin-bottom: 10px;
}

.link-item p {
    font-size: 14px;
    color: #666;
    margin-bottom: 15px;
}

.link-item a {
    color: #000;
    text-decoration: none;
    font-weight: bold;
    border-bottom: 1px solid #000;
}

.link-item a:hover {
    background-color: #000;
    color: #fff;
}

/* Footer */
footer {
    background-color: #000;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

footer p {
    margin: 10px 0;
}

footer a {
    color: #fff;
    text-decoration: none;
    border-bottom: 1px solid #fff;
    margin: 0 10px;
}

footer a:hover {
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 36px;
    }
    
    nav {
        gap: 15px;
    }
    
    h2 {
        font-size: 28px;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .buttons {
        flex-direction: column;
    }
    
    .button {
        width: 100%;
        text-align: center;
    }
}