:root{
    --primary-color: #f3f4f5;
    --secondary-color: #d6d6d6;
    --background-color: #f4f4f4;
    --hover-color: #554747;
    --text-color: #333;
    --color-black: #000;
    --color-white: #fff;
    --font-family: 'sans-serif';
}

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--primary-color);
    color: var(--text-color);
    overflow-x: hidden;
}   

/* General */
.container {
    max-width: 2000px;
    margin: 0 auto;
    padding-top: 70px;
}

.line{
    width: 50%;
    margin: 0 auto;
    height: 1px;
    background-color: var(--color-black);
}

/* Header */
nav{
    background-color: var(--background-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.body-nav{
    max-width: 2000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
}

.left-nav{
    display: flex;
    align-items: center;
    padding: 10px;
}

.left-nav p{
    font-size: 1.2rem;
    color: var(--color-black);
    margin-right: 10px;
    font-family:'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
}

.right-nav{
    align-items: center;
    padding: 10px 100px;
    display: flex;
    justify-content: flex-end;
}

.right-nav ul{
    display: flex;
    list-style: none;
    gap: 25px;
}



.right-nav ul li a{
    font-size: 1.2rem;
    color: var(--color-black);
    font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    text-decoration: none;
    transition: color 0.3s ease;
}

.right-nav ul li a:hover{
    color: var(--hover-color);
    text-decoration: underline;
    font-size: 1.4rem;
    transition: color 0.3s ease, font-size 0.3s ease, font-weight 0.3s ease;
}



/* about header */
#about-header{
    min-height: 80vh;
    background-color: var(--color-white);
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}

.content-about{
    position: relative;
    left :-20%;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.title-header{
    font-size: 0.8rem;
    color: #ff1010;
    padding-bottom: 10px;
    text-transform: uppercase;
}

.about-body h2{
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 2.5rem;
    color: var(--color-black);
}

#name{
    color: #ff1010;
}

#role{
    padding-bottom: 1rem;
    font-size: 1.2rem;
    color: var(--color-black);
    text-transform: uppercase;
}

.desc-about-body p{
    font-size: 1.2rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#contact-button{
    padding-top: 1rem;
}

#contact-button a{
    color: var(--color-white);
    background-color: transparent;
    text-decoration: none;
}

#contact-button button{
    padding: 10px 20px;
    font-size: 1.2rem;
    background-color: var(--color-black);
    border: none;
    cursor: pointer;
    transition: background-color 0.3s ease, color 0.3s ease;
}

#contact-button button:hover{
    opacity: 0.8;
}

.wave-container {
    line-height: 0;
    max-width: 2000px;
    margin: 0 auto;
    position: relative;
    background-color: var(--color-white);
}

.wave-container svg {
    display: block;
    width: 100%;
    height: auto;
}

/* About */
#about{
    display: flex;
    flex-direction: column;
    align-items: center;
}

#about h2{
    font-size: 2.5rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    margin-bottom: 10px;
}

#about h2::after{
    content: '';
    display: block;
    border-bottom: 0.5rem solid #ff1010;
    width: 50px;
    left: 0;
}

#about p{
    font-size: 1.3rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    max-width: 800px;
    text-align: justify;
    margin-bottom: 40px;
}

.skills {
    display: flex;
    justify-content:center;
    padding: 0px 60px;
}

.program-language ul{
    list-style: none;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    padding: 20px 0px;
}

.program-language ul li{
    font-size: 1.2rem;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

/* experience */
.timeline{
    padding: 40px;
    display: flex;
    justify-content: center;
}
#timeline-container{
    position: relative;
    padding-left: 40px;
    border-left: 4px solid var(--color-black);
}

.timeline-item{
    position: relative;
    margin-bottom: 40px;
    padding-left: 30px;
}

.timeline-dot{
    position: absolute;
    left: -50px;
    top: 90px;
    width: 16px;
    height: 16px;
    background-color: var(--color-black);
    border-radius: 50%;
    z-index: 1;
}

.timeline-content{
    display: flex;
    align-items: start;
    gap: 15px;
}

.experience{
    padding: 200px 0px;
}

.experience h1{
    font-size: 2rem;
    padding-left: 10%;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#experience h1::after {
    content: '';
    display: block;
    border-bottom: 0.5rem solid #ff1010;
    width: 50px;
    left: 0;
}

.timeline-body img{
    width: 250px;
}

.timeline-body h2{
    font-size: 1.5rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

.timeline-body time{
    font-size: 1.2rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

.timeline-body p{
    padding: 10px 0px;
    font-size: 1.2rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

.timeline-body ul li{
    font-size: 1.2rem;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    margin-bottom: 10px;
}

/* Project */
#projects{
    min-height: 100vh;
}

.body-project{
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 0px;
}

.body-project h1{
    font-size: 2.5rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    margin-bottom: 20px;
}

.body-project h2{
    font-size: 2rem;;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    padding: 500px 0px;
    margin-bottom: 20px;
}

/* education */
#education h1 {
    font-size: 2rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    padding-left: 10%;
}

#education h1::after {
    content: '';
    display: block;
    border-bottom: 0.5rem solid #ff1010;
    width: 50px;
    left: 0;
}

.timeline-edu-center {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 40px 0;
}

.timeline-edu {
  padding: 40px;
  display: flex;
  justify-content: center;
}

#timeline-edu-container {
  position: relative;
  margin-left: 30px;
  padding-left: 40px;
  border-left: 4px solid var(--color-black);
}


.timeline-edu-item {
  position: relative;
  margin-bottom: 60px;
  display: flex;
  align-items: flex-start;
}

.timeline-edu-dot {
  position: relative;
  top: 12px;
  left: -50px;
  width: 16px;
  height: 16px;
  background-color: var(--color-black);
  border-radius: 50%;
  flex-shrink: 0;
}

.timeline-edu-content {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.timeline-edu-content img {
  border-radius: 10px;
}

#unpam img{
    width: 120px;
}

#unpam h2{
    font-size: 1.5rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#unpam time{
    font-size: 1.2rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#unpam p{
    font-size: 1.2rem;
    color: var(--text-color);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#smkn6 img{
    width: 80px;
}

#smkn6 h2{
    font-size: 1.5rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#smkn6 time{
    font-size: 1.2rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#smkn6 p{
    font-size: 1.2rem;
    color: var(--text-color);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#smkn6 h3{
    font-size: 1.2rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    margin: 10px 0px;
}

#smkn6 ul li{
    font-size: 1.2rem;
    color: var(--text-color);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    margin-bottom: 2px;
}

#smpn15 img{
    width: 80px;
}

#smpn15 h2{
    font-size: 1.5rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#smpn15 time{
    font-size: 1.2rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#smpn15 p{
    font-size: 1.2rem;
    color: var(--text-color);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}


#sd img{
    width: 120px;
}

#sd h2{
    font-size: 1.5rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#sd time{
    font-size: 1.2rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#sd p{
    font-size: 1.2rem;
    color: var(--text-color);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

/* contact */
#contact h1{
    font-size: 2rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    text-align: center;
    margin-bottom: 20px;
}

#contact p{
    font-size: 1.3rem;
    color: var(--color-black);
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-body{
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 0px;
}

.contact-body ul{
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.contact-body ul li img{
    width: 60px;
    transition: transform 0.3s ease;
}


/* footer */
footer{
    background-color: var(--color-black);
    padding: 0 20px;
    text-align: center;
}

.footer-container{
    max-width: 2000px;
    margin: 0 auto;
}
.footer-container p{
    color: var(--color-white);
    font-size: 1.2rem;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    padding: 20px 0;
}

.hidenav {
    display: none;
}

@media (max-width: 1024px) {
    .content-about {
        left: 0;
    }

    .right-nav {
        padding: 10px 20px;
    }
}

@media (max-width: 768px) {
    .right-nav {
        display: none;
    }

    .hidenav {
        display: flex;
        align-items: center;
        padding-right: 20px;
    }

    .body-nav {
        padding: 0 10px;
    }

    .left-nav p {
        font-size: 1rem;
    }

    .left-nav img {
        width: 40px;
    }

    .responsive-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: var(--color-white);
        z-index: 2000;
        transition: 0.4s ease-in-out;
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    }

    .responsive-nav.active {
        right: 0;
    }

    .responsive-nav ul {
        list-style: none;
        padding: 80px 40px;
        display: flex;
        flex-direction: column;
        gap: 30px;
    }

    .responsive-nav ul li a {
        font-size: 1.5rem;
        text-decoration: none;
        color: var(--color-black);
        font-weight: bold;
    }

    #about-header {
        flex-direction: column;
        padding-top: 100px;
    }

    .content-about {
        left: 0;
        width: 100%;
    }

    .about-body h2 {
        font-size: 2rem;
    }

    .timeline-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

@media (max-width: 460px) {
    .left-nav p {
        font-size: 0.8rem;
    }

    .left-nav b {
        display: block;
    }

    .about-body h2 {
        font-size: 1.6rem;
    }

    #role {
        font-size: 0.9rem;
    }

    .contact-body ul {
        flex-wrap: wrap;
        justify-content: center;
    }
}

#loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-black);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader {
    width: 50px;
    height: 50px;
    border: 5px solid var(--secondary-color);
    border-top: 5px solid #ff1010;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loader-hidden {
    opacity: 0;
    visibility: hidden;
}

#screen-warning {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-white);
    z-index: 10000;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 20px;
}

.warning-content h2 {
    color: #ff1010;
    margin: 15px 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.warning-content p {
    font-family: 'Gill Sans', sans-serif;
    color: var(--color-black);
    line-height: 1.6;
}

@media (max-width: 349px) {
    #screen-warning {
        display: flex;
    }
    
    header, main, footer, #loader-wrapper {
        display: none !important;
    }
}