* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    background: #0d1117;
    color: #c9d1d9;
    line-height: 1.6;
    padding: 20px;
    max-width: 900px;
    margin: 0 auto;
}

header {
    border-bottom: 1px solid #30363d;
    padding-bottom: 20px;
    margin-bottom: 30px;
}

h1 {
    font-size: 24px;
    font-weight: 400;
    color: #58a6ff;
    margin-bottom: 15px;
}

.date-selector {
    display: flex;
    gap: 10px;
    align-items: center;
}

.date-selector button {
    background: #21262d;
    border: 1px solid #30363d;
    color: #c9d1d9;
    padding: 8px 16px;
    cursor: pointer;
    font-family: inherit;
    font-size: 14px;
    transition: all 0.2s;
}

.date-selector button:hover {
    background: #30363d;
    border-color: #58a6ff;
}

#datePicker {
    background: #0d1117;
    border: 1px solid #30363d;
    color: #c9d1d9;
    padding: 8px 12px;
    font-family: inherit;
    font-size: 14px;
}

#datePicker::-webkit-calendar-picker-indicator {
    filter: invert(1);
}

main {
    font-size: 14px;
}

main h1 {
    font-size: 20px;
    margin: 30px 0 15px;
    color: #58a6ff;
    border-bottom: 1px solid #30363d;
    padding-bottom: 8px;
}

main h2 {
    font-size: 18px;
    margin: 25px 0 12px;
    color: #8b949e;
}

main h3 {
    font-size: 16px;
    margin: 20px 0 10px;
    color: #8b949e;
}

main a {
    color: #58a6ff;
    text-decoration: none;
}

main a:hover {
    text-decoration: underline;
}

main ul {
    margin: 10px 0;
    padding-left: 30px;
}

main li {
    margin: 8px 0;
}

main blockquote {
    border-left: 3px solid #30363d;
    margin: 15px 0;
    padding: 10px 0 10px 15px;
    color: #8b949e;
}

main code {
    background: #161b22;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 13px;
}

main pre {
    background: #161b22;
    padding: 15px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 15px 0;
}

main pre code {
    background: none;
    padding: 0;
}

.error {
    color: #f85149;
    padding: 20px;
    text-align: center;
}

.loading {
    color: #8b949e;
    padding: 20px;
    text-align: center;
}

@media (max-width: 768px) {
    body {
        padding: 15px;
    }
    
    h1 {
        font-size: 20px;
    }
    
    .date-selector {
        flex-wrap: wrap;
    }
    
    #datePicker {
        flex: 1;
        min-width: 150px;
    }
}