/*
Color Pallette for Main Stylesheet
Header/Footer Background: #000000
Header Text: #efefe3
Body Background: #dddddd
Body Header Text: #222831
Body Text: #30475e
Links Hover: #4a70a9
Links Active: #f05454
Container Background: #8fabd4
*/

/* ******************** */
/* Base HTML components */
/* ******************** */
* {
    /* Style for fonts to all webpage */
    font-family: "Open Sans", sans-serif;
    font-optical-sizing: auto;
    font-style: normal;
}

html {
    /* Base color style to the webpage */
    background-color: #dddddd;
    color: #30475E;
}

html, body {
    /* push footer to stay always to the bottom */
    box-sizing: border-box;
    overflow-x: hidden;
    width: 100%;
    height: 100%;
}

body {
    /* set the base display of the body */
    display: flex;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}

/* END OF STYLE SECTION */ 
/* ******************** */
/*  Set Color Styling   */
/* ******************** */

#header, #footer {
    background-color: #000000;
    color: #efefe3;
}

.highlight-selected {
    color: #f05454 !important;
}

.lang-container,
.navbar a {
    color: #efefe3;
}

.lang-button{
    color: #efefe3cc;
}

.navbar a:hover,
.lang-button:hover,
.certificate-info a:hover {
    color: #8fabd4;
}

.collaborations-title,
.project-title,
.project-link,
.publications-item h2,
.certificate-info a {
    color: #30475e;
}

.navbar a:active,
.lang-button:active,
.project-title:active,
.collaborations-title:active,
.project-link:active,
.skills-item:hover,
.btn-style:active,
.btn-style.secondary:active,
.certificate-info a:active {
    color: #f05454;
}

.footer-logo,
.collaborations-item,
.project-item {
    background-color: #ffffff;
}

.skills-item, 
.contact-item,
.publications-item,
.certificate-card {
    background-color: #f7f9fc;
}

.project-item,
.collaborations-item,
.skills-item, 
.contact-item {
    color: #30475e;
    border: #30475e 2px solid;
}

.collaborations-item:hover,
.project-item:hover {
    border: #8fabd4 2px solid;
}

.skills-item, 
.contact-item {
    background-color: #f7f9fc;
}

.skills-item li {
    color: #000000;
    border-bottom: #30475e 1px solid;
}

.btn-style {
    background-color: #30475e;
    color: #ffffff;
}

.btn-style:hover,
.btn-style:active {
    background-color: #8fabd4;
}

.btn-style.secondary {
    background-color: #222222;
    color: #ffffff;
}

.btn-style.secondary:hover,
.btn-style.secondary:active {
    background-color: #888888;
}


.btn-style.tertiary {
    background-color: #a14a0f;
    color: white;
}

.btn-style.tertiary:hover {
    background-color: #e99f51;
}

.btn-style.tertiary:active {
    background-color: #e99f51;
    color: #f05454;
}

.demo-item p,
.contact-item p {
    color: #000000;
}

/* END OF STYLE SECTION */ 
/* ******************** */

#header, #footer {
    padding: 0px 10px 0px 10px;
    width: 100%;
    height: auto;
    max-height: 210px;
}

#header {
    min-height: 210px;
}

/* Footer Style */
footer {
    margin-top: auto;
    font-size: 15px;
}
 
.footer-logo {
    max-width: 30px;
    height: auto;
    border-radius: 50%;
    margin: 0px 3px 0px 0px;
    vertical-align: middle;
}

/* Header Style /**/
#logo-img {
    max-width: 80px;
    height: auto;
    border-radius: 0% 50% 100% 50%;
    margin: 10px 0px 0px 20px;
}

.navbar{
    margin: 25px;
}

.navbar a {
    font-weight: bold;
    text-decoration: none;
    padding: 0px 2.5px 0px 2.5px;
}

.nav-link {
    text-align: center;
}

.lang-container{
    font-size: 20px;
    padding: 10px 0px 0px 0px
}

.lang-button {
    background-color: rgba(0, 0, 0, 0);
    border: none;
    font-weight: bold;
    font-size: 15px;
}

#main-content {
    flex: 1 0 auto;
    min-width: 320px;
    max-width: calc(100% - 40px); /* prevent width + margin overflow */
    padding: 20px;
    margin: auto;
    width: 100%;
    height: auto;
    text-align: center;
}

/* Utility Style /**/
.inline-flex {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.center {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.full-width {
    min-width: 100%;
}

.full-content {
    width: 100%;
    height: auto;
    justify-content: center;
}

.text-justify {
    text-align: justify;
    text-justify: inter-word;
}

.hidden {
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.unhidden {
    opacity: 1;
    transition: opacity 0.8s ease-in-out;
}

.gradient-bw{
    background: radial-gradient(circle,rgba(255, 255, 255, 0.3) 0%, rgba(0, 0, 0, 0.4) 100%);;
    width: 100%;
    height: 100%;
}

.dynamic-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    max-width: 100%;
}

#profile-section h1,
#projects-section h1, 
#skills-section h1, 
#publications-section h1,
#certificates-section h1,
#demo-section h1,
#contact-section h1 {
    margin-bottom: 40px;
}

/*Profile Section */
.profile-item {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    align-items: center;
}

.profile-item p {
    font-size: 17px;
}

.profile-photo {
    min-width: 320px;
    max-width: 20%;
    height: auto;
    border-radius: 50%;
}

.profile-description {
    min-width: 320px;
    max-width: 1024px;
    height: auto;
}

/* Projects Section */

.project-item {
    display: flex;
    flex-wrap: wrap;
    flex-direction: row;
    height: auto;
    border-radius: 30px;
    justify-content: center;
    vertical-align: middle;
    padding: auto;
}

.project-item {
    min-width: 200px;
    min-height: 200px;
    max-width: 200px;
    max-height: 300px;
    height: 100%;
}

.project-image {
    display: block;
    padding: 5px;
    margin: auto;
    max-width: 156px;
    max-height: 156px;
    border-radius: 15px;
}

.collaborations-image {
    width: 140px;
    height: 140px;
    object-fit: contain;               /* image stays inside the box */
    display: flex;
    margin: 0 auto;                    /* horizontal center */

    /* Center vertically inside the item */
    flex-grow: 1;
    align-self: center;
    margin-top: 10px;
    margin-bottom: 10px;
}

.collaborations-title,
.project-title {
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
    margin: 10px 0px 5px 0px;
    width: 100%;
}

.collaborations-title:hover,
.project-title:hover, 
.project-link:hover {
    text-decoration: underline;
}

.project-link {
    text-align: center;
    font-size: 13px;
    text-decoration: none;
    margin: 0px 0px 10px 0px;
    width: 100%;
}

/* Skills Section */

#collaborations-section,
#skills-section {
    padding: 20px 20px;
    text-align: center; 
}

#collaborations-container,
#skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    max-width: 1280px;
    margin: 0 auto;
}

.skills-item, 
.contact-item {
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 20px 30px;
    width: 250px;
    text-align: left;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    height: 98%;
}

#collaborations-container {
    align-items: stretch;
}

/* Collaboration Item — equal size + proper centering */
.collaborations-title {
    font-size: 20px;
}

.collaborations-item {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;       /* Titles stay at top */
    align-items: center;               /* Center items horizontally */

    width: 200px;
    min-height: 200px;                 /* <<< This forces equal height */
    padding: 20px 30px;

    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.collaborations-item:hover,
.skills-item:hover {
    z-index: 1;
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.skills-item h2 {
    text-align: center;
    margin-bottom: 16px;
    font-size: 1.2em;
}

.skills-item ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.skills-item li {
    padding: 6px 0;
    font-size: 0.95em;
}

.skills-item li:last-child {
  border-bottom: none;
}

.collaborations-item {
    text-align: center;
}

/* Publications Section */
#publications-section {
    padding: 60px 20px;
    text-align: justify;
}

.publications-item {
    width: 100%;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 25px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.publications-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 15px rgba(0,0,0,0.15);
}

.publications-item h2 {
  margin-bottom: 8px;
}

.btn-style {
  display: inline-block;
  margin-right: 10px;
  padding: 8px 14px;
  border: none;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.9em;
  font-weight: bold;
}

.citation-container {
    white-space: pre-wrap;
    background-color: #ffffff;
    color: #000000;
    max-width: 1024px;
    padding: 20px;
    margin: 0 auto;
    text-align: justify;
}

/* Certificates Section */

#certificates-container {
    width: 100%;
}

.certificate-item {
  background-color: #f7f9fc;
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 25px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  width: 100%;
}

/* Certificates grid container */
.certificate-grid {
  display: flex;
  flex-wrap: wrap;       
  gap: 1rem;              
  justify-content: center; 
}

/* Each certificate card */
.certificate-card {
  flex: 1 1 450px;
  max-width: 500px;       
  display: flex;
  flex-direction: column;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  overflow: hidden;
  transition: transform 0.2s;
}

.certificate-card:hover {
  transform: scale(1.03);
}

/* Preview iframe */
.certificate-preview iframe {
  width: 100%;
  height: 200px;
  border: none;
}

/* Certificate info */
.certificate-info {
  padding: 0.5rem 0.75rem;
  text-align: center;
}

.certificate-info a {
  text-decoration: none;
  font-weight: bold;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.certificates-card p {
  margin: 0;
}

/* Demo Section */
#demo-section {
    display: grid;
    flex-wrap: wrap;
    flex-direction: column;
    max-width: 1024px;
    margin: auto;
}

.demo-item {
    color: #30475e;
    background-color: #fff;
    border: #30475e 2px solid;
    padding: 15px 20px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    width: 100%;
}

.demo-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

/* Contact Section */
#contact-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, 300px);
    gap: 40px;
    max-width: 1280px;
    margin: 0 auto;
}

/* Media */
@media (max-width: 1024px) {
    #header, #footer {
        max-height: 300px;
    }
}

@media (max-width: 768px) {
    #header, #footer {
        max-height: 280px;
    }

    #logo-img {
        max-width: 70px;
    }

    .header-title {
        font-size: 30px;
    }

    .lang-container{
        font-size: 15px;
    }

    .lang-button {
        font-size: 12px;
    }
}

@media (max-width: 512px) {
    #header, #footer {
        max-height: 330px;
    }

    #logo-img {
        max-width: 60px;
    }

    .header-title {
        font-size: 25px;
    }

    .nav-link {
        font-size: 15px;
    }

    .lang-container{
        font-size: 12px;
    }

    .lang-button {
        font-size: 10px;
    }
}