styles.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    margin: 0; 
    font-family: 'Signika', sans-serif;
    font-weight: 300;
    color: rgba(0, 0, 0, 0.75);
    line-height: 1.5;
    text-align: center;
    font-size: 1.25rem;
}
img {
    display: block;
    width: 100%;
    height: auto;
}

p {
    margin: 0;
    padding: 1em 0;
}

.title {
    display: block;
    padding: 1.1rem 1.1rem 0 1.1rem;;
    margin: 1rem 1rem 2rem;    
    text-align: center;
    font-size: 40px;
    font-weight: 300;
    letter-spacing: -0.05em;   
}

/* Buttons */

.btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 5rem auto;    
    padding: 1rem;
    font-size: 1.75rem;   
    outline-style: none;
    max-width: 300px;
    max-height: 70px;
    justify-content: center;
    font-family: 'Signika', sans-serif;
    font-weight: 300;
    border-radius: 5px;
    text-align: center; 
    line-height: 0.5;
    transition: transform 1s;
    cursor: pointer;
}
.btn-dark {
    background: #40596b;  
}
.btn-light {
    background: #FFFFFF;   
    margin: 2rem auto; 

    animation-name: moveUpAndDown;
    animation-duration: 3s;
}
.btn-dark a  {   
    text-decoration: none;
    color: rgba(255, 255, 255, 0.9);      
}

.btn img {
    width: 40px;
    height: 40px;
    margin: 0 1rem 0 0;
    transition: transform 1s;
}
.btn-dark:hover {
    background: rgba(0, 0, 0, 0.7);    
    transform: scale(0.95);
}
.btn-light:hover {
    transform: scale(0.95);
}
.btn-light a {
    text-decoration: none;
    color: rgba(0, 0, 0, 0.75); 
}
.btn-light a strong {
    color: rgba(0, 0, 0, 0.65);
}
.btn-dark:hover img, .btn:hover img{
    transform: scale(1.5) rotate(18deg);   
}
#my-btn {
    display:none;
    position:fixed;
    bottom: 1.3rem;
    right: 1.8rem;
    z-index:99;
    border: none;
    outline: none;
    background: #FFD05A;
    color: #40596b;
    cursor: pointer;
    padding: 0.5rem;
    font-size: 1.1rem;
    border-radius: 5px;
}
#my-btn img {
    width: 1.6rem;
}

/* NavBar Section */
nav ul {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 0 auto 0 0;  
    padding: 0 0.25rem; 
    height: 60px;
    list-style: none;
    background: 	#40596b;
}
nav ul a {
    text-decoration: none;
    color: #FFD05A;
    text-align: center;
    padding: 0.35rem;
    font-size: 1.2rem;
}
/* Header Section */

header {
    background: #55C0EC;
    min-height: 80vh;
}
.container {
    margin:  0 auto 1rem auto;
    min-width: 300px;
    padding: 1.2rem;
    justify-content: center;
    align-items: center;
}

h1 {
    display: inline-block;
    font-size: 80px;
    color: rgba(0, 0, 0, 0.6); 
    margin: 0  1.2rem;
    font-weight: 300;
    letter-spacing: -0.05em;
    
    animation-name: moveUpAndDownH1;
    animation-duration: 1s;
}
h1 .ticky-bold {
    color: rgba(0, 0, 0, 0.65);
    font-weight: 600; 

    
}
header .left p {
    color: #FFFFFF;
    font-size: 1.65rem;
    line-height: 1.5;
    margin: 0 0 2rem;

    animation-name: moveUpAndDown;
    animation-duration: 2s;
}
.bot {
    max-width: 300px;
    margin: 0 auto;

    animation-name: moveUpAndDown;
    animation-duration: 4s;
}


/* About Section */

.about-card {
    padding: 1rem;
    text-align: center;
    margin: 1rem;
}
.title-about {
    margin: 0;
    padding: 0;

    animation-name: moveUpAndDown;
    animation-duration: 5s;
}
.half-left, .half-right {
    text-align: left;
    margin: 0 0 1rem;
    padding: 0 1.2rem;
}
.full {
    text-align: left;
    padding: 0 1rem;
}
.full p {
    margin: 0;
}


/* Features Section */ 

.feature-cards {
    background: #90DDAA;
    padding: 1rem;
}
.one, .two, .three {
    padding: 1rem 0 0 0;
    margin: 1rem 1rem 3rem ;
    background: #40596b;
    justify-items: center;
}
.fig-img {    
    max-width: 220px;
    margin: 4rem auto;   
}
figcaption {
    display: block;
    background: #FFFFFF;
    font-size: 1.2rem;
    padding: 1rem;
    grid-row: 2 / 3;   
}

.red {
    color: #DC143C;
}

/* Add Slack Section */

.addSlack {
    padding: 1rem;
    text-align: center;
    margin: 1rem;  
}

/* Footer */

footer {
    margin-top: 2rem;
    background: #40596b;
    color: #FFFFFF;
    text-align: center;
    padding: 1rem;
       
}
footer p {
    font-size: 0.8rem;
    
    line-height: 1;
    padding: 0.5rem;
}
footer a {
    
    color: #FFFFFF;
}


@media(min-width: 650px) {

    /* NavBar Section */
nav ul {
    display: grid;
    grid-template-columns: 1fr auto auto auto auto 1fr ;
    grid-template-areas: ".  home about features add .";
    margin: 0 auto;   
    height: 60px;
    list-style: none;
    align-items: center;
    justify-content: center;
    background: 	#40596b;
}
.home {
    grid-area: home;
}
.about {
    grid-area: about;
}
.features {
    grid-area: features;
}
.add{
    grid-area: add;
}
/* Header Section */
   header{
    display: grid;
    grid-template-areas: "left right";
    column-gap: 1rem;
    grid-template-columns: repeat(2, 1fr);
    }
    .fig-img {
        max-width: 400px;
    }

  .left {
    grid-area: left;
    text-align: center;
    justify-content: center;  
    margin: auto 1rem;;
    align-content: center;
    padding: 1.5rem;
  }
  .right {
    grid-area: right;
    margin: auto;
  }

  /* About Section */
  .box {
    display: grid;
    grid-gap: 1rem;
    grid-template-columns: repeat(2, 1fr); 
}
/* Features Section */ 
.cards {
    display: grid;
    grid-gap: 1rem;
    grid-template-areas: "one two"
                         " three three";
}
.one {
    grid-area: "one";
}
.two {
    grid-area: "two";
}
.three {
    grid-area: "three";
    grid-column: 1 / -1;
}
.fig-img {    
    max-width: 220px;
    margin: 4rem auto;   
}
/* Add Slack Section */
.addSlack {
    padding: 1rem;
    text-align: center;
    margin: 0 10rem;  
}

}

@media(min-width: 900px) {
    /* Features Section */ 
    .cards {
        display: grid;
        grid-gap: 1rem;
        grid-template-columns: "one two three";
    }
    .one {
        grid-area: "one";
        grid-column: 1 / 2;
    }
    .two {
        grid-area: "two";
        grid-column: 2 / 3;
    }
    .three {
        grid-area: "three";
        grid-column: 3 / 4;
    }
    .fig-img {    
        max-width: 220px;
        margin: 4rem auto;   
    }
    .bot {
        max-width: 400px;
    }

}
/* animations */
@keyframes moveUpAndDownH1 {
    0% {
        opacity: 1;
        transform: translateY(-20px);
    }
    20% {
        opacity: 0.2;
    }
    80% {
        opacity: 0.7;
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}
@keyframes moveUpAndDown {
    0% {
        opacity: 1;
        transform: translateY(-25px);
    }
    20% {
        opacity: 0;
        
    }  
    100% {
        opacity: 1;
        transform: translateY(0)
        
    }
}