```css
/* Global Reset */

*{
margin:0;
padding:0;
box-sizing:border-box;
font-family:Arial, sans-serif;
}

/* Body */

body{
background:#0D1117;
color:white;
line-height:1.6;
}

/* Container */

.container{
max-width:1200px;
margin:auto;
padding:40px 20px;
}

/* Navbar */

.navbar{
background:#161B22;
padding:15px 20px;
display:flex;
justify-content:space-between;
align-items:center;
}

.navbar a{
color:white;
text-decoration:none;
}

.nav-links{
display:flex;
gap:20px;
list-style:none;
}

/* Buttons */

button,
.btn{
background:#FFD700;
color:black;
border:none;
padding:10px 20px;
border-radius:6px;
cursor:pointer;
font-weight:bold;
}

button:hover{
opacity:0.9;
}

/* Hero Section */

.hero{
background:#161B22;
padding:80px 20px;
text-align:center;
}

.hero h1{
font-size:40px;
margin-bottom:10px;
}

.hero p{
color:#aaa;
margin-bottom:20px;
}

/* Cards */

.card{
background:#161B22;
padding:20px;
border-radius:10px;
margin-bottom:20px;
}

/* Dashboard Cards */

.cards{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
gap:20px;
}

.value{
font-size:26px;
color:#FFD700;
}

/* Match Cards */

.matches-grid{
display:grid;
grid-template-columns:repeat(auto-fill,minmax(250px,1fr));
gap:20px;
}

.match-card{
background:#161B22;
padding:20px;
border-radius:10px;
}

/* Tables */

table{
width:100%;
border-collapse:collapse;
background:#161B22;
}

table th,
table td{
padding:12px;
text-align:center;
}

table th{
background:#222;
}

table tr:nth-child(even){
background:#1c1f26;
}

/* Leaderboard */

.leaderboard{
border-radius:10px;
overflow:hidden;
}

/* Forms */

input,
select{
width:100%;
padding:10px;
border:none;
border-radius:6px;
margin-top:5px;
margin-bottom:10px;
}

/* Footer */

.footer{
background:#161B22;
text-align:center;
padding:20px;
margin-top:40px;
color:#aaa;
}

/* Sidebar */

.sidebar{
width:220px;
background:#161B22;
height:100vh;
padding:20px;
}

.sidebar ul{
list-style:none;
}

.sidebar li{
margin-bottom:10px;
}

.sidebar a{
color:white;
text-decoration:none;
}

/* Status Colors */

.win{
color:#00ff88;
font-weight:bold;
}

.loss{
color:#ff4d4d;
font-weight:bold;
}

.pending{
color:#FFD700;
font-weight:bold;
}

/* Responsive */

@media(max-width:768px){

.nav-links{
flex-direction:column;
}

.cards{
grid-template-columns:1fr;
}

.matches-grid{
grid-template-columns:1fr;
}

}
```