body {
    background: linear-gradient(135deg, #232526 0%, #0f2027 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', Arial, sans-serif;
}


.container {
    background: rgba(30, 30, 30, 0.85);
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.35);
    text-align: center;
}


h1 {
    color: #f8ffae;
    margin-bottom: 30px;
    font-size: 2.2rem;
    letter-spacing: 2px;
    text-shadow: 0 2px 8px #232526;
}


.btn {
    padding: 15px 40px;
    margin: 0 15px;
    font-size: 1.1rem;
    border: none;
    border-radius: 8px;
    background: linear-gradient(90deg, #232526 0%, #434343 100%);
    color: #f8ffae;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,0.25);
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}


.btn:hover {
    transform: scale(1.08);
    box-shadow: 0 4px 16px rgba(0,0,0,0.35);
    background: linear-gradient(90deg, #434343 0%, #232526 100%);
}


nav {
    position: absolute;
    top: 20px;
    right: 20px;
}

nav a {
    color: #ecf0f1;
    text-decoration: none;
    margin-left: 15px;
    padding: 8px 15px;
    border: 1px solid rgba(236, 240, 241, 0.5);
    border-radius: 20px;
    transition: all 0.3s ease;
}

nav a:hover {
    background-color: #ecf0f1;
    color: #2c3e50;
}