/* 
    COLOR PALETTE:
    #061E29 (dark)
    #1D546D (primary)
    #5F9598 (accent)
    #F3F4F4 (light)
*/

body {
    margin: 0;
    font-family: "Poppins", Arial, sans-serif;
    background: #F3F4F4;
    color: #061E29;
}

/* 
    NAVIGATION BAR WITH FLEX
    ref: https://www.w3schools.com/css/css_navbar_horizontal.asp
*/
nav {
    list-style-type: none;
    margin: 0;
    padding: 10px;
    background-color: #061E29;
    display: flex;
    justify-content: center;
}
nav li a {
    display: block;
    color: #F3F4F4;
    padding: 10px 14px;
    text-decoration: none;
}
nav li a:hover {
    background-color: #1D546D;    
}

/* HEADINGS */
h1 {
    text-align: center;
    color: #F3F4F4;
    margin-top: 30px;
}

/* INTRODUCTION SECTION */
.flex-container {
    display: flex;
    flex-direction: row;
    justify-content: center;  /* align center horizontically */
    gap: 20px;
    padding: 30px;
    background-color: #1D546D;
    color: #F3F4F4;
}
.flex-item:first-child {
    display: flex;
    /* horizontally center image and texxt */
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.flex-item:nth-child(2) {  /* ref: https://www.w3schools.com/cssref/sel_nth-child.php */
    display: flex;
    flex-direction: column;
    justify-content: center;  /* vertical center */
    align-items: center;  /* center horizontally */
    text-align: center;  /* center text */
}
.flex-item:nth-child(2) h1 {
    font-size: 80px;
    margin-bottom: 8px; 
}
.flex-item:nth-child(2) p { 
    font-size: 20px;
    margin-top: 0;
    line-height: 1.2;
}

/* PROFILE IMAGE */
.profile {
  width: 350px;
  border-radius: 12px;  /* round corner */
  border: 3px solid #5F9598;
}

/* AUTOBIBLIOGRAPHY SECTION */
.flex-container4 {
    display: flex;
    justify-content: center;  /* center whole section */
    align-items: center;
    gap: 30px;
    padding: 40px;
}
.flex-about {
    max-width: 600px; 
}
.flex-about p {
    font-size: 22px;
    line-height: 1.6;
    text-align: justify;  /* justify text */
    margin: 0 auto;
}
.flex-about:nth-child(2) {
  display: flex;
  justify-content: center;  /* horizontal center */
  align-items: center;  /* vertical center */
}
.about {
  display: block;
  width: 500px;
  max-width: 100%;
  border-radius: 12px;  /* round corners */
  margin: 0 auto;     
}


/* PROJECTS SECTION */
.flex-container2 {
    display: flex;
    flex-direction: row;
    justify-content: center;    /* center the 3 columns as a group */
    gap: 20px;
    padding: 20px;
}
.flex-project {
    display: flex;
    flex-direction: column;
    align-items: center;  /* center video + text*/
    text-align: center;
    width: 300px;
}

/* SKILLS SECTION */
.flex-container3 {
    display: flex;
    flex-direction: row;
    gap: 20px;
    padding: 20px;
    justify-content: center;  /* center the  3 columns as a group */
}
.flex-project h3 {
    margin: 12px 0 0;
    min-height: 48px; 
}
.flex-project p {
    margin-top: 0;
    line-height: 1;
}
.flex-project video, .flex-project .skill{
    width: 100%;
    height: 300px; 
    object-fit: cover;  /*ref: https://www.w3schools.com/css/css3_object-fit.asp */
    border-radius: 12px;  /* round corneer */
}

/* FOOTER SECTION */
.footer {
    background: #061E29;
    color: #F3F4F4;
    padding: 20px;
    text-align: center;
}
.footer-logo {
    width: 150px;
}
.back-to-top {
    color: #00e8f4;
    text-decoration: none;
    font-weight: bold;
}