body {
    background-color: #121212;
    color: #FFFFFF;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
}

.sidebar {
    width: 240px;
    background-color: #000000;
    height: 100vh;
    position: fixed;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.sidebar .logo {
    font-size: 24px;
    font-weight: bold;
    color: #FFFFFF;
    margin-bottom: 40px;
}

.sidebar nav a {
    display: flex;
    align-items: center;
    color: #B3B3B3;
    text-decoration: none;
    padding: 12px 15px;
    margin: 8px 0;
    border-radius: 8px;
    transition: background-color 0.3s, color 0.3s;
}

.sidebar nav a:hover, .sidebar nav a.active {
    background-color: #282828;
    color: #FFFFFF;
}

.sidebar nav a i {
    margin-right: 15px;
}

.main-content {
    margin-left: 240px;
    padding: 40px;
    width: calc(100% - 240px);
}

section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

h1, h2 {
    font-weight: 700;
}

h1 {
    font-size: 4rem;
    margin-bottom: 20px;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 30px;
    text-align: center;
}

.lead {
    font-size: 1.25rem;
    color: #B3B3B3;
    margin-bottom: 30px;
}

.btn-primary {
    background-image: linear-gradient(to right, #1DB954, #1ED760);
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 50px;
    color: #FFFFFF;
    transition: transform 0.2s;
}

.btn-primary:hover {
    transform: scale(1.05);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: #1E1E1E;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-card i {
    font-size: 3rem;
    color: #1DB954;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.feature-card p {
    color: #B3B3B3;
}

.form-control {
    background-color: #282828;
    border: 1px solid #404040;
    color: #FFFFFF;
    padding: 15px;
    border-radius: 8px;
}

.form-control:focus {
    background-color: #282828;
    border-color: #1DB954;
    color: #FFFFFF;
    box-shadow: none;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}