/* About Me Section */
.about-me {
    padding: 4rem 0;
    background-color: #fff;
}

.about-me h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap; /* Allows wrapping on smaller screens */
}

.about-content img {
    flex: 1;
    max-width: 350px;
    border-radius: 10px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.about-text {
    flex: 2;
}

.about-text h3 {
    font-size: 1.8rem;
    color: #5061C4;
    margin-bottom: 1rem;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.skills-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 2rem;
}

.skills-list li {
    background: #eef0f8;
    color: #5061C4;
    padding: 8px 15px;
    border-radius: 20px;
    font-weight: 500;
}

/* Responsive Design for About Section */
@media (max-width: 768px) {
    .about-content {
        flex-direction: column;
        text-align: center;
    }
}

/* Styling for Achievements Section */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.achievement-card {
    background: #f9f9f9;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #5061C4;
    text-align: left;
}

.achievement-card h4 {
    margin-top: 0;
    color: #5061C4;
}

/* Styling for Administrative Roles Section */
.roles-list {
    list-style: none;
    padding: 0;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.roles-list li {
    background: #fff;
    border: 1px solid #e0e0e0;
    padding: 0.75rem 1.25rem;
    border-radius: 25px;
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

/* Re-using skills-list for courses, just ensuring it's centered */
.courses-section .skills-list {
    max-width: 900px;
    margin: 0 auto;
}


/* --- General Section Title Styling --- */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    margin-top: 5rem;
    position: relative;
    padding-bottom: 1rem;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: #5061C4;
    border-radius: 2px;
}


/* --- Animated Experience Timeline --- */
/* --- Dynamic Experience Timeline --- */
/* --- Road Map Experience Timeline --- */
.experience-timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: 4rem 0; /* More padding for the curves */
    overflow: hidden; /* Hide overflow of curves */
}

/* Remove the old straight center line */
.experience-timeline::after {
    display: none; 
}

/* Base Item Styling */
.timeline-item {
    position: relative;
    width: 50%;
    padding: 1rem 0 1rem 0;
    box-sizing: border-box;
    z-index: 1;
}

/* --- THE ROAD MAP CURVES (The Snake Logic) --- */

/* 1. ODD ITEMS (Left side) */
.timeline-item:nth-child(odd) {
    float: left;
    clear: both;
    text-align: right;
    padding-right: 60px; /* Space for the curve */
}

/* Draw the curve for Odd items: Goes Down -> Curves Right */
.timeline-item:nth-child(odd)::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%; /* Extends into the right side of screen */
    height: 100%;
    border-right: 4px solid #e0e0e0;
    border-bottom: 4px solid #e0e0e0;
    border-radius: 0 0 50px 0; /* Bottom-Right Corner rounded */
    z-index: -1;
}

/* 2. EVEN ITEMS (Right side) */
.timeline-item:nth-child(even) {
    float: right;
    clear: both;
    text-align: left;
    padding-left: 60px; /* Space for the curve */
    margin-top: -4px; /* Fix tiny gap between borders */
}

/* Draw the curve for Even items: Goes Down -> Curves Left */
.timeline-item:nth-child(even)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 50%; /* Extends into the left side of screen */
    height: 100%;
    border-left: 4px solid #e0e0e0;
    border-bottom: 4px solid #e0e0e0;
    border-radius: 0 0 0 50px; /* Bottom-Left Corner rounded */
    z-index: -1;
}

/* Special Case: The Last Item shouldn't curve back, just end */
.timeline-item:last-child::before {
    border-bottom: none;
    border-radius: 0;
}

/* --- THE DOTS (Traffic Stops) --- */
.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: #fff;
    border: 4px solid #5061C4;
    border-radius: 50%;
    top: 25px; 
    z-index: 2;
    transition: transform 0.3s ease;
}

/* Position dots on the 'Road' line */
.timeline-item:nth-child(odd)::after {
    right: -12px; /* On the right edge */
}

.timeline-item:nth-child(even)::after {
    left: -12px; /* On the left edge */
}

.timeline-item:hover::after {
    background-color: #5061C4;
    transform: scale(1.3);
}

/* --- DOUBLE SIDED ITEM (Left & Right at same height) --- */

/* 1. Container Layout */
.timeline-item.double-sided {
    width: 100%;
    height: auto;
    float: none;
    clear: both;
    display: flex;
    justify-content: space-between;
    align-items: stretch; /* <--- CHANGED from flex-start to stretch */
    position: relative;
    margin-bottom: 3rem; /* Add space before the next timeline item starts */
}

/* 2. Straight Center Line (Overrides the snake curve) */
.timeline-item.double-sided::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    width: 4px;
    height: 100%;
    background: #e0e0e0;
    transform: translateX(-50%); /* Perfectly centers the line */
    
    /* Remove the curve borders */
    border: none;
    border-radius: 0;
}

/* 3. Center the Dot */
.timeline-item.double-sided::after {
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    z-index: 2;
}

/* 4. Size the Children (The link <a> and the div) */
.timeline-item.double-sided > a, 
.timeline-item.double-sided > .timeline-content {
    display: flex;
    flex-direction: column;
}

/* Ensure the content inside the link expands fully */
.timeline-item.double-sided .timeline-content {
    width: 80%;
    height: auto; 
    box-sizing: border-box;
}
.timeline-item.double-sided > a, 
.timeline-item.double-sided > .timeline-content-1 {
    display: flex;
    flex-direction: column;
}

/* Ensure the content inside the link expands fully */
.timeline-item.double-sided .timeline-content-1 {
    width: 50%;
    height: auto; 
    box-sizing: border-box;
}

/* 5. ARROWS CONFIGURATION */

/* Left Item Arrow (Points Right) */
.timeline-item.double-sided > a:first-child .timeline-content::before,
.timeline-item.double-sided > .timeline-content:first-child::before {
    left: auto;
    right: -15px;
    border-width: 10px 0 10px 15px;
    border-color: transparent transparent transparent #fff;
}
.timeline-item.double-sided > a:first-child .timeline-content-1::before,
.timeline-item.double-sided > .timeline-content-1:first-child::before {
    left: auto;
    right: -15px;
    border-width: 10px 0 10px 15px;
    border-color: transparent transparent transparent #fff;
}

/* Right Item Arrow (Points Left) */
.timeline-item.double-sided > .timeline-content:last-child::before,
.timeline-item.double-sided > a:last-child .timeline-content::before {
    left: -15px;
    right: auto;
    border-width: 10px 15px 10px 0;
    border-color: transparent #fff transparent transparent;
}
.timeline-item.double-sided > .timeline-content-1:last-child::before,
.timeline-item.double-sided > a:last-child .timeline-content-1::before {
    left: -15px;
    right: auto;
    border-width: 10px 15px 10px 0;
    border-color: transparent #fff transparent transparent;
}

/* Profile Link Responsive Styling */
/* --- MOBILE RESPONSIVE (Stack them) --- */
@media screen and (max-width: 768px) {
    .timeline-item.double-sided {
        flex-direction: column;
        padding-left: 70px;
        padding-right: 25px;
    }

    .timeline-item.double-sided .timeline-content {
        width: 100% !important; /* Forces full width on phones */
    }

    .timeline-item.double-sided > a, 
    .timeline-item.double-sided > .timeline-content {
        width: 100%;
        margin-bottom: 2rem;
    }
    .timeline-item.double-sided .timeline-content-1 {
        width: 100% !important; /* Forces full width on phones */
    }

    .timeline-item.double-sided > a, 
    .timeline-item.double-sided > .timeline-content-1 {
        width: 100%;
        margin-bottom: 2rem;
    }

    /* Move line back to the left */
    .timeline-item.double-sided::before {
        left: 30px;
        transform: none;
    }

    /* Move dot back to the left */
    .timeline-item.double-sided::after {
        left: 19px;
        transform: none;
    }

    /* Reset Arrows to point Left */
    .timeline-item.double-sided > a:first-child .timeline-content-1::before,
    .timeline-item.double-sided > .timeline-content-1:first-child::before,
    .timeline-item.double-sided > .timeline-content-1:last-child::before {
        left: -15px;
        right: auto;
        border-width: 10px 15px 10px 0;
        border-color: transparent #fff transparent transparent;
    }

    /* Reset Arrows to point Left */
    .timeline-item.double-sided > a:first-child .timeline-content-1::before,
    .timeline-item.double-sided > .timeline-content-1:first-child::before,
    .timeline-item.double-sided > .timeline-content-1:last-child::before {
        left: -15px;
        right: auto;
        border-width: 10px 15px 10px 0;
        border-color: transparent #fff transparent transparent;
    }

}

/* --- CONTENT BOXES --- */
.timeline-content {
    background: #fff;
    text-align: center;
    align-items: center;
    height: auto;
    padding: 1.5rem 2rem;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    position: relative;
    transition: transform 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-5px);
}

/* Arrows pointing to the road */
.timeline-content::before {
    content: " ";
    position: absolute;
    top: 30px;
    width: 0;
    height: 0;
    border-style: solid;
    z-index: 1;
}

.timeline-item:nth-child(odd) .timeline-content::before {
    right: -15px;
    border-width: 10px 0 10px 15px;
    border-color: transparent transparent transparent #fff;
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: -15px;
    border-width: 10px 15px 10px 0;
    border-color: transparent #fff transparent transparent;
}

/* Typography */
.timeline-content h4 { margin: 0 0 5px 0; color: #5061C4; font-size: 1.2rem; }
.timeline-content p { margin: 5px 0; font-weight: 600; color: #333; }
.timeline-date {
    display: inline-block;
    font-size: 0.9rem;
    color: #777;
    background: #f0f2f5;
    padding: 4px 10px;
    border-radius: 15px;
    margin-top: 10px;
}
    
/* --- CONTENT BOXES --- */
.timeline-content-1 {
    background: #fff;
    text-align: center;
    align-items: center;
    height: auto;
    padding: 1.5rem 2rem;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    position: relative;
    transition: transform 0.3s ease;
}

.timeline-content-1:hover {
    transform: translateY(-5px);
}

/* Arrows pointing to the road */
.timeline-content-1::before {
    content: " ";
    position: absolute;
    top: 30px;
    width: 0;
    height: 0;
    border-style: solid;
    z-index: 1;
}

.timeline-item:nth-child(odd) .timeline-content-1::before {
    right: -15px;
    border-width: 10px 0 10px 15px;
    border-color: transparent transparent transparent #fff;
}

.timeline-item:nth-child(even) .timeline-content-1::before {
    left: -15px;
    border-width: 10px 15px 10px 0;
    border-color: transparent #fff transparent transparent;
}

/* Typography */
.timeline-content-1 h4 { margin: 0 0 5px 0; color: #5061C4; font-size: 1.2rem; }
.timeline-content-1 p { margin: 5px 0; font-weight: 600; color: #333; }
.timeline-date {
    display: inline-block;
    font-size: 0.9rem;
    color: #777;
    background: #f0f2f5;
    padding: 4px 10px;
    border-radius: 15px;
    margin-top: 10px;
}

/* Clearfix for float layout */
.experience-timeline::after {
    /* Use this to clear floats since we removed the vertical line */
    content: "";
    display: table;
    clear: both;
}

/* --- MOBILE RESPONSIVE (Revert to Straight Line) --- */
@media screen and (max-width: 768px) {
    .experience-timeline {
        padding: 2rem 0;
    }

    /* Restore specific "straight line" for mobile */
    .experience-timeline::before {
        content: '';
        position: absolute;
        top: 0; bottom: 0;
        left: 30px;
        width: 4px;
        background: #e0e0e0;
    }

    .timeline-item {
        width: 100%;
        float: none;
        padding-left: 70px;
        padding-right: 25px;
        margin-bottom: 2rem;
        text-align: left;
    }

    /* Hide the curving road segments on mobile */
    .timeline-item:nth-child(odd)::before,
    .timeline-item:nth-child(even)::before {
        display: none;
    }

    /* Reset dots to left side */
    .timeline-item:nth-child(odd)::after,
    .timeline-item:nth-child(even)::after {
        left: 19px;
        right: auto;
    }

    /* Reset arrows */
    .timeline-item:nth-child(odd) .timeline-content::before,
    .timeline-item:nth-child(even) .timeline-content::before {
        left: -15px;
        right: auto;
        border-width: 10px 15px 10px 0;
        border-color: transparent #fff transparent transparent;
    }
}
/* --- Books & Achievements Cards --- */
.achievements-grid, .books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}
.achievement-card {
    background: #f9f9f9;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #5061C4;
}
.achievement-card h4 {
    margin-top: 0;
    color: #5061C4;
}

/* Book Card Specific Styles */
.book-card {
    text-align: center;
}
.book-cover {
    background: linear-gradient(45deg, #5061C4, #6a7ee8);
    color: white;
    padding: 3rem 1.5rem;
    border-radius: 8px 3px 3px 8px;
    margin-bottom: 1rem;
    box-shadow: 5px 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}
.book-card:hover .book-cover {
    transform: rotateY(-10deg) scale(1.02);
}
.book-cover h4 {
    margin: 0;
    font-size: 1.5rem;
}
.book-cover span {
    display: block;
    margin-top: 0.5rem;
    opacity: 0.8;
}

/* --- PhD Supervision Grid --- */
.phd-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    max-width: 900px;
    margin: auto;
}
.phd-card {
    padding: 0.75rem 1.25rem;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid;
}
.phd-card.awarded {
    background-color: #E6F4EA;
    color: #34A853;
    border-color: #34A853;
}
.phd-card.pursuing {
    background-color: #FEF4E6;
    color: #FBBC05;
    border-color: #FBBC05;
}
.phd-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}



/* Make the cards look clickable */
.phd-card {
    cursor: pointer;
}

/* --- Modal (Popup) Styles --- */
.modal {
    display: none; /* Hidden by default */
    position: fixed; 
    z-index: 2000; /* Sit on top of everything */
    padding-top: 100px; 
    left: 0;
    top: 0;
    width: 100%; 
    height: 100%; 
    overflow: auto; 
    background-color: rgb(0,0,0); /* Fallback color */
    background-color: rgba(0,0,0,0.9); /* Black w/ opacity */
}

/* Modal Content (Image) */
.modal-content {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
    border-radius: 8px;
    animation: zoom 0.6s;
}

/* Caption of Modal Image */
#modalCaption {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
    text-align: center;
    color: #ccc;
    padding: 10px 0;
    height: 150px;
    font-size: 1.2rem;
}

/* Add Animation */
@keyframes zoom {
    from {transform:scale(0)} 
    to {transform:scale(1)}
}

/* The Close Button */
.close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}

/* Responsive Modal */
@media only screen and (max-width: 700px){
    .modal-content {
        width: 100%;
    }
}



/* Styling for the Book Images */
.book-image {
    width: 100%;           /* Fills the card width */
    max-width: 250px;      /* Limits size so it doesn't get too huge */
    height: auto;          /* Keeps original shape */
    border-radius: 8px;    /* Rounded corners */
    box-shadow: 0 10px 20px rgba(0,0,0,0.15); /* Nice 3D shadow */
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

/* Hover Effect: Book pops up slightly */
.book-card:hover .book-image {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 15px 25px rgba(0,0,0,0.25);
}

/* Typography for Book Titles */
.book-card h4 {
    color: #5061C4;
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.book-card .year {
    color: #777;
    font-size: 0.9rem;
    font-weight: normal;
}



/* --- Courses Taught Section (Dynamic Scrolling) --- */

.courses-section {
    padding: 3rem 0;
    margin-bottom: 4rem;
    overflow: hidden; /* Hides the scrollbar */
    background: #fff;
}

.marquee-container {
    display: flex;
    overflow: hidden; /* Crucial: Hides content that goes off screen */
    width: 100%;
    margin-bottom: 1.5rem; /* Space between rows */
     /* Fades edges */
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
    display: flex;
    gap: 1.5rem; /* Space between the two lists */
    width: max-content; /* Force track to be as wide as content */
}

.courses-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 1.5rem; /* Space between individual tags */
}

/* Individual Tag Styling */
.courses-list li {
    background: #f4f6fc;
    color: #5061C4;
    border: 1px solid #e0e0e0;
    padding: 12px 25px;
    border-radius: 50px; /* Pill shape */
    font-size: 1rem;
    font-weight: 600;
    white-space: nowrap; /* Prevents text breaking */
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, background 0.3s;
}

/* Hover Effect: Pause animation and highlight */
.courses-list li:hover {
    background: #5061C4;
    color: #fff;
    transform: scale(1.1);
    cursor: pointer;
    box-shadow: 0 8px 15px rgba(80, 97, 196, 0.3);
}

/* Pause scrolling when hovering over the track */
.marquee-track:hover {
    animation-play-state: paused;
}

/* --- ANIMATIONS --- */

/* Scroll Left Animation */
.scroll-left {
    animation: scrollLeft 40s linear infinite;
}

@keyframes scrollLeft {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); } /* Moves halfway because list is duplicated */
}

/* Scroll Right Animation */
.scroll-right {
    animation: scrollRight 45s linear infinite;
}

@keyframes scrollRight {
    0% { transform: translateX(-50%); } /* Starts halfway */
    100% { transform: translateX(0); }
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .courses-list li {
        padding: 8px 15px;
        font-size: 0.9rem;
    }
    .scroll-left { animation-duration: 25s; } /* Faster on mobile */
    .scroll-right { animation-duration: 30s; }
}



/* =========================================
   MOBILE RESPONSIVENESS (Add to bottom of file)
   ========================================= */

@media screen and (max-width: 768px) {

    /* 1. General Spacing & Typography */
    .about-me, .full-page, .horizontal, .courses-section {
        padding: 2rem 0; /* Reduce huge vertical gaps */
    }
    .section-title {
        font-size: 2rem; /* Smaller headings */
        margin-top: 3rem;
        margin-bottom: 2rem;
    }
    .container {
        width: 90%; /* Ensure content doesn't touch screen edges */
        padding: 0 15px;
    }

    /* 2. Intro Section (Image + Text) */
    .about-content {
        flex-direction: column; /* Stack vertically */
        text-align: center;
        gap: 1.5rem;
    }
    .about-content img {
        max-width: 80%; /* Slightly smaller profile image */
        margin: 0 auto;
    }

    /* 3. Books Section */
    .books-grid {
        /* Force single column so books don't get squished */
        grid-template-columns: 1fr; 
        gap: 2rem;
    }
    .book-image {
        max-width: 180px; /* Smaller book covers */
    }

    /* 4. Vertical Marquee (Experience) */
    .vertical-marquee-container {
        height: 350px; /* Reduce window height on mobile */
    }
    .v-timeline-content {
        padding: 1rem 1.5rem; /* Less padding inside cards */
        max-width: 100%;
    }
    .v-timeline-content h4 {
        font-size: 1.1rem;
    }

    /* 5. PhD Grid */
    .phd-grid {
        gap: 0.75rem;
    }
    .phd-card {
        width: 100%; /* Full width buttons for easier tapping */
        text-align: center;
        padding: 10px;
        font-size: 0.9rem;
    }

    /* 6. Achievements Grid */
    .achievements-grid {
        grid-template-columns: 1fr; /* Stack vertically */
    }

    /* 7. Courses Marquee adjustments */
    .courses-list li {
        padding: 8px 15px;
        font-size: 0.85rem;
    }
    /* Speed up animation slightly on mobile so it doesn't look static */
    .scroll-left { animation-duration: 20s; }
    .scroll-right { animation-duration: 25s; }

    /* Responsive profile link */
    .profile-link {
        width: 100% !important;
    }
}