* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #05070a;
    color: #d7ffe0;
    font-family: "Courier New", monospace;
    line-height: 1.7;
}

header {
    background:
        linear-gradient(135deg, #001a0d, #000000);
    border-bottom: 1px solid #00ff66;
    padding: 50px 20px;
    text-align: center;
}

header h1 {
    color: #00ff66;
    font-size: 3em;
    text-shadow: 0 0 15px #00ff66;
    margin: 0;
}

header p {
    color: #9affb8;
}


nav {
    background: #000;
    border-bottom: 1px solid #00ff66;
    text-align: center;
    padding: 15px;
}

nav a {
    color: #00ff66;
    margin: 0 20px;
    text-decoration: none;
}

nav a:hover {
    color: white;
    text-shadow: 0 0 10px #00ff66;
}


.container {
    max-width: 950px;
    margin: auto;
    padding: 30px;
}


.card {
    background: #0b1117;
    border: 1px solid #00ff66;
    padding: 25px;
    margin-bottom: 25px;
    border-radius: 8px;
    box-shadow:
        0 0 15px rgba(0,255,102,0.15);
}


h2 {
    color: #00ff66;
}


a {
    color: #00ccff;
}


.code {
    background: black;
    border-left: 4px solid #00ff66;
    padding: 15px;
    color: #00ff66;
}


.warning {
    border-color: #ff3333;
    color: #ffaaaa;
}


footer {
    text-align: center;
    padding: 40px;
    color: #777;
    font-size: 0.9em;
}


@media(max-width:700px){

header h1 {
    font-size: 2em;
}

.container {
    padding: 15px;
}

}