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

html {
    scroll-behavior: smooth;
    scrollbar-width: auto;
    scrollbar-color: #adb5bd #f8f9fa;
    overflow-y: scroll;
    /* 防止缩放 */
    touch-action: pan-y;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa; /* Slightly lighter grey */
    /* 防止过度滚动和缩放 */
    overscroll-behavior: contain;
    touch-action: pan-y;
}

a {
    text-decoration: none;
    color: #007bff; /* Primary theme color - blue */
}

a:hover {
    color: #0056b3; /* Darker blue on hover */
}

li {
    list-style: none;
}

h1, h2, h3 {
    margin-bottom: 1rem;
    font-weight: 300;
    line-height: 1.2;
}

h2 {
    font-size: 2rem;
    color: #343a40; /* Darker grey for headers */
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #dee2e6; /* Light border under headers */
    display: inline-block; /* Keep border only under text */
}

h3 {
    font-size: 1.4rem;
    font-weight: 400;
    color: #495057;
}

.container {
    max-width: 1100px;
    margin: auto;
    overflow: visible;
    padding: 0 20px;
}

.section-padding {
    padding: 4rem 0;
}

.bg-light {
    background-color: #fff; /* White background for alternating sections */
    border-top: 1px solid #e9ecef;
    border-bottom: 1px solid #e9ecef;
}

.lead {
    font-size: 1.4rem; /* Slightly larger lead text */
    margin-bottom: 2rem;
    font-weight: 300;
    color: #e9ecef; /* Light color for hero lead */
}

/* --- Button Styles --- */
.btn {
    display: inline-block;
    font-weight: 400;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    padding: 0.6rem 1.5rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 0.25rem;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    text-transform: uppercase; /* Uppercase button text */
    letter-spacing: 0.5px;
}

.btn-primary {
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
    box-shadow: 0 2px 5px rgba(0, 123, 255, 0.3);
}

.btn-primary:hover {
    color: #fff;
    background-color: #0056b3;
    border-color: #004085;
    transform: translateY(-2px); /* Slight lift on hover */
    box-shadow: 0 4px 8px rgba(0, 123, 255, 0.4);
}

.btn-secondary {
    color: #007bff;
    background-color: transparent;
    border: 1px solid #007bff;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
    box-shadow: 0 4px 10px rgba(0, 123, 255, 0.3);
    transform: translateY(-2px);
}

.btn-small {
    padding: 0.4rem 1rem;
    font-size: 0.875rem;
    line-height: 1.5;
    border-radius: 0.2rem;
}

/* --- Header & Navbar --- */
#main-header {
    background: #343a40;
    color: #f8f9fa;
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0;
    height: 70px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    max-width: 1200px;
}

.personal-info {
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.personal-info .name {
    font-weight: 600; /* Bolder name */
    font-size: 1.1rem;
    color: #fff; /* White name */
}

.personal-info a,
.personal-info span {
    color: #adb5bd; /* Lighter grey info text */
    transition: color 0.3s ease;
    display: inline-flex; /* Align icon and text */
    align-items: center;
}

.personal-info a:hover {
    color: #fff;
}

.personal-info i {
    margin-right: 6px;
    color: #007bff; /* Primary color icons */
}

#navbar {
    flex-grow: 1;
    display: flex;
    justify-content: flex-end;
}

#navbar ul {
    display: flex;
    margin: 0;
    padding: 0;
}

#navbar li a {
    color: #f5f5f5;
    padding: 0.75rem 1rem;
    margin: 0 0.1rem;
    font-weight: 400;
    border-radius: 4px;
    text-transform: uppercase;
    font-size: 0.9rem;
    position: relative;
    transition: color 0.3s ease, transform 0.2s ease;
    text-decoration: none;
}

#navbar li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 5px;
    left: 50%;
    background-color: #f5f5f5;
    transition: all 0.3s ease-out;
    transform: translateX(-50%);
}

#navbar li a:hover {
    color: #fff;
    transform: scale(1.05);
}

#navbar li a:hover::after {
    width: 80%;
}

#menu-btn {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

/* --- Hero Section --- */
#hero {
    /* --- ACTION NEEDED: Verify this RELATIVE path is correct! --- */
    /* --- Ensure 'images' folder exists and filename matches EXACTLY. --- */
    background: linear-gradient(rgba(40, 40, 60, 0.85), rgba(40, 40, 60, 0.85)), url('images/neural_network.jpg') no-repeat center center/cover;
    height: calc(100vh - 70px);
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 20px;
    position: relative;
    overflow: hidden;
    transition: background-color 0.4s ease;
}

/* Canvas动画样式 */
#animation-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.8; /* 稍微增加不透明度 */
    display: block !important; /* 强制显示 */
}

.hero-content {
    position: relative;
    z-index: 1;
}

/* Simple CSS hover effect example */
#hero::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at center, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none; /* Ensure it doesn't block interactions */
}
#hero:hover::after {
    opacity: 1;
}

#hero h1 {
    font-size: 3.8rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

#hero .social-links a {
    color: #fff;
    margin: 0 0.8rem;
    font-size: 1.8rem; /* Slightly smaller social icons */
    transition: color 0.3s ease, transform 0.3s ease;
}

#hero .social-links a:hover {
    color: #007bff; /* Primary color on hover */
    transform: scale(1.1); /* Scale up on hover */
}

#hero .social-links {
    margin-bottom: 2.5rem;
}

/* --- Education Timeline --- */
.timeline {
    position: relative;
    margin: 2rem 0;
    padding: 1rem 0;
    list-style: none;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 3px; /* Thinner line */
    height: 100%;
    background-color: #dee2e6; /* Lighter line color */
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    left: 0;
    padding-right: 30px;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: 50%;
    padding-left: 30px;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: #fff;
    border: 3px solid #007bff; /* Primary color border */
    top: 5px; /* Adjust vertical position */
    z-index: 1;
}

.timeline-item:nth-child(odd)::after {
    right: -8px;
}

.timeline-item:nth-child(even)::after {
    left: -7px; /* Adjusted for thinner line */
}

.timeline-content {
    /* REMOVED background-color: #fff; */
    background-color: rgba(0, 0, 0, 0.4); /* Semi-transparent dark overlay FOR content */
    padding: 1.5rem;
    border-radius: 6px;
    box-shadow: 0 3px 8px rgba(0,0,0,0.08);
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.2); /* Light border on dark overlay */
    background-size: cover;
    background-position: center;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, filter 0.3s ease;
    z-index: 1;
}

/* Remove the arrow pseudo-element */
.timeline-content::before {
    display: none;
}

/* Pseudo-element for blurred background FOR THE ITEM, behind the content */
.education-entry::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: var(--bg-image); /* Use CSS variable */
    background-size: cover;
    background-position: center;
    filter: blur(4px) brightness(0.95);
    z-index: -1;
    transition: filter 0.4s ease, transform 0.4s ease;
    transform: scale(1.05);
}

.education-entry:hover::before {
    filter: blur(2px) brightness(1.05);
    transform: scale(1.1);
}

/* --- ACTION NEEDED: Verify these RELATIVE paths are correct! --- */
/* --- Ensure 'images' folder exists and filenames match EXACTLY. --- */
.education-entry.ukm { --bg-image: url('images/UKM.png'); }
.education-entry.apu { --bg-image: url('images/APU.png'); }
.education-entry.staffordshire { --bg-image: url('images/SU.jpg'); }

/* Ensure content text is readable over background */
.timeline-content h3,
.timeline-content p,
.timeline-content span,
.timeline-content strong {
    position: relative;
    z-index: 2;
    color: #f5f5f5; /* Ensure bright text color */
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7); /* Enhance shadow slightly */
}
.timeline-content h3 {
    color: #fff; /* Override default */
    font-weight: 500;
}
.timeline-content .institution {
    font-weight: bold;
    margin-bottom: 0.5rem;
}
.timeline-content .qs-rank,
.timeline-content .ranking-info {
    font-size: 0.9em;
    font-weight: normal;
    background-color: rgba(0, 123, 255, 0.7); /* Semi-transparent primary bg */
    color: #fff;
    padding: 3px 8px;
    border-radius: 12px;
    display: inline-block;
    margin-top: 0.5rem;
}
.timeline-content .date {
    font-size: 0.85em;
    display: block;
    margin-bottom: 0.5rem;
    color: #dee2e6; /* Lighter date color */
}


/* --- Experience Section --- */
#experience {
    position: relative;
    overflow: hidden;
    z-index: 0;
}

/* Blurred Background for Experience */
#experience::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    /* --- ACTION NEEDED: Verify this RELATIVE path is correct! --- */
    /* --- Ensure 'images' folder exists and filename matches EXACTLY. --- */
    background: url('images/finance-bg.jpg') no-repeat center center/cover;
    filter: blur(10px);
    z-index: -1;
    opacity: 0.3;
    transition: opacity 0.4s ease, transform 0.4s ease;
}

/* Ensure content is visible above background */
#experience > .container {
    position: relative;
    z-index: 1;
}

/* Make cards semi-transparent to show background slightly */
.experience-card {
    background: rgba(255, 255, 255, 0.85); /* Semi-transparent white */
    backdrop-filter: blur(3px); /* Optional: Blur effect on card itself */
    /* ... rest of experience card styles ... */
    padding: 1.5rem;
    border-radius: 6px;
    box-shadow: 0 3px 8px rgba(0,0,0,0.08);
    border-left: 5px solid #007bff;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
}

.experience-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 123, 255, 0.2);
    background-color: rgba(255, 255, 255, 0.95); /* Slightly less transparent on hover */
}

.experience-card h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: #333;
}

.experience-card .company {
    font-weight: bold;
    color: #555;
    margin-bottom: 1rem;
    display: flex; /* Use flexbox for alignment */
    justify-content: space-between; /* Push date to the right */
    align-items: center;
    flex-wrap: wrap; /* Allow wrapping on small screens */
}

.experience-card .date {
    font-size: 0.9em;
    color: #777;
    white-space: nowrap; /* Prevent date from wrapping */
    margin-left: 10px; /* Space between company and date */
}

.experience-card ul {
    padding-left: 0; /* Remove default padding */
    list-style: none; /* Remove default bullets */
}

.experience-card li {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: flex-start; /* Align icon with first line */
}

.experience-card li i {
    color: #2ecc71; /* Green checkmark */
    margin-right: 0.75rem;
    margin-top: 4px; /* Align icon vertically */
}

.tech-highlight {
    background-color: #eafaf1; /* Light green background */
    color: #28a745; /* Darker green text */
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: bold;
    font-size: 0.9em;
}

/* Add more styles as we build */

/* 项目标题图标样式 */
.project-content h3 i {
    margin-right: 8px;
    color: #007bff;
    font-size: 0.9em;
    vertical-align: middle;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        height: auto;
    }

    #main-header {
        height: auto; /* Allow height to adjust */
        padding: 1rem 0;
        position: relative; /* Remove sticky for simpler mobile nav */
    }

    .personal-info {
        flex-direction: column;
        text-align: center;
        gap: 5px;
        margin-bottom: 1rem;
        font-size: 0.8rem;
    }

     .personal-info .name {
        font-size: 1rem;
    }

    #navbar {
        display: none; /* Hide normal nav */
        width: 100%;
        text-align: center;
    }

    #navbar.active {
        display: block; /* Show when active */
    }

    #navbar ul {
        flex-direction: column;
    }

    #navbar li a {
        padding: 0.75rem 1rem;
        display: block; /* Make links take full width */
        border-top: 1px solid #444; /* Separator */
    }
     #navbar li:first-child a {
        border-top: none;
    }

    #menu-btn {
        display: block; /* Show hamburger */
        position: absolute;
        top: 15px;
        right: 20px;
    }

    #hero h1 {
        font-size: 2.5rem;
    }

    #hero .lead {
        font-size: 1.2rem;
    }

     .section-padding {
        padding: 2rem 0;
    }

    /* Adjust timeline for mobile */
    .timeline::before {
        left: 10px; /* Adjusted position */
    }

    .timeline-item {
        width: 100%;
        padding-left: 35px; /* Space for icon and line */
        padding-right: 0;
        text-align: left;
        left: 0 !important;
    }

    .timeline-item:nth-child(odd) {
        text-align: left;
    }

    .timeline-item:nth-child(even) {
        left: 0; /* Reset left positioning */
        padding-left: 35px;
    }

    .timeline-item::after {
        left: 4px; /* Position icon on the left line */
        width: 12px; height: 12px; border-width: 3px;
    }

    .timeline-content {
        margin-left: 10px; /* Give content space from line */
    }

    .experience-card:hover {
        transform: translateY(-5px); /* Less lift on mobile */
        box-shadow: 0 8px 16px rgba(0, 123, 255, 0.15);
    }

    .experience-grid {
        grid-template-columns: 1fr; /* Stack cards vertically */
    }
    .experience-card .company {
       flex-direction: column; /* Stack company and date */
       align-items: flex-start;
    }
    .experience-card .date {
        margin-left: 0;
        margin-top: 5px;
    }
}

@media (max-width: 1024px) {
    /* Adjust personal info for tablets if needed */
    .personal-info {
        font-size: 0.8rem; /* Slightly smaller on tablets */
        gap: 8px;
    }
    .personal-info .name {
        font-size: 1rem;
    }

    #navbar li a {
        padding: 1rem 0.75rem;
    }

    .project-grid {
         grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

/* Modal Styles */
.modal {
     background-color: rgba(0,0,0,0.75); /* Darker overlay */
     display: none; /* Hidden by default */
     position: fixed; /* Stay in place */
     z-index: 2000; /* Sit on top of everything */
     left: 0;
     top: 0;
     width: 100%; /* Full width */
     height: 100%; /* Full height */
     overflow: auto; /* Enable scroll if needed */
}

.modal-content {
    background-color: #fff;
    margin: 10% auto; /* 10% from the top and centered */
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    width: 80%; /* Could be more or less, depending on screen size */
    max-width: 800px;
    position: relative;
}

.close-btn {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close-btn:hover,
.close-btn:focus {
    color: #333;
    text-decoration: none;
}

.modal h2 {
    color: #007bff;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
    margin-top: 0;
}

.modal p strong {
    color: #343a40;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    margin-bottom: 3rem; /* Space before language skills */
}

.skill-category {
    background: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    border-top: 4px solid #007bff; /* Primary color accent */
}

.category-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #eee;
}

.category-header i {
    font-size: 1.8rem;
    color: #007bff;
    margin-right: 1rem;
    width: 30px; /* Fixed width for alignment */
    text-align: center;
}

.category-header h3 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 500;
}

.skill-list {
    list-style: none;
    padding: 0;
}

.skill-list li {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    font-size: 0.95rem;
}

.skill-list li i {
    margin-right: 0.75rem;
    color: #555; /* Icon color */
    width: 20px; /* Align icons */
    text-align: center;
}

/* Specific icons might need adjustments */
.skill-list li i.fa-registered { /* Example for R */
    font-size: 0.9em;
}

.language-skills {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px dashed #ccc;
}

.language-skills h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
}

.language-skills h3 i {
    margin-right: 0.75rem;
    color: #007bff;
}

/* Honors & Certifications Section */
.honors-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 3rem;
    margin-top: 2rem;
}

.honors-container h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    color: #333;
    border-bottom: 2px solid #007bff; /* Primary color accent */
    padding-bottom: 0.5rem;
}

.honors-container h3 i {
    margin-right: 0.75rem;
    color: #007bff;
}

/* Publications List */
.publications ul {
    list-style: none;
    padding: 0;
}

.publications li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.publications li > i {
    font-size: 1.8rem;
    color: #16a085; /* Teal color for publications */
    margin-right: 1rem;
    margin-top: 5px;
    width: 25px;
    text-align: center;
}

.publications li div strong {
    display: block;
    font-size: 1.05rem;
    margin-bottom: 0.25rem;
}

.publications li div p {
    font-size: 0.9rem;
    color: #555;
    margin: 0 0 0.75rem 0; /* Add space before link */
}

/* Patents & Copyrights List */
.patents-copyrights ul {
    list-style: none;
    padding: 0;
}

.patents-copyrights li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.patents-copyrights li > i {
    font-size: 1.8rem;
    color: #f39c12; /* Gold color for patents/copyrights */
    margin-right: 1rem;
    margin-top: 5px; /* Align icon slightly */
    width: 25px;
    text-align: center;
}

.patents-copyrights li div strong {
    display: block;
    font-size: 1.05rem;
    margin-bottom: 0.25rem;
}

.patents-copyrights li div p {
    font-size: 0.9rem;
    color: #555;
    margin: 0 0 0.75rem 0; /* Add space before link */
}

.patent-highlight {
    font-size: 0.8em;
    font-weight: bold;
    background-color: #fdebd0; /* Light orange */
    color: #e67e22; /* Orange */
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 5px;
}

/* Certificate Thumbnail Styles */
.certificate-link {
    display: inline-flex; /* Align image and text */
    align-items: center;
    background-color: #ecf0f1;
    padding: 5px 10px;
    border-radius: 4px;
    text-decoration: none;
    color: #2c3e50;
    font-size: 0.9em;
    transition: background-color 0.3s ease;
}

.certificate-link:hover {
    background-color: #bdc3c7;
}

.certificate-thumb {
    width: 40px; /* Small thumbnail */
    height: auto;
    margin-right: 8px;
    border: 1px solid #ccc;
    vertical-align: middle;
}

/* Certifications Grid */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}

.certificate-item {
    background: #fff;
    padding: 1rem;
    border-radius: 6px;
    text-align: center;
    border: 1px solid #eee;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.certificate-item:hover {
     transform: translateY(-3px);
     box-shadow: 0 5px 10px rgba(0,0,0,0.1);
}

.certificate-item i {
    font-size: 2.5rem;
    color: #007bff;
    display: block;
    margin-bottom: 0.75rem;
}

.certificate-item span {
    font-size: 0.9rem;
    font-weight: 500;
    color: #333;
}

/* Team Experience */
.team-experience ul {
     list-style: none;
    padding: 0;
}

.team-experience li {
    display: flex;
    align-items: center;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.team-experience li i {
    margin-right: 0.75rem;
    color: #27ae60; /* Green icon */
    width: 20px;
    text-align: center;
}

/* Contact Section */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr; /* Split into two columns */
    gap: 3rem;
    margin-top: 2rem;
}

.contact-details {
    list-style: none;
    padding: 0;
    margin-top: 1rem;
}

.contact-details li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    font-size: 1rem;
}

.contact-details li i {
    font-size: 1.2rem;
    color: #007bff;
    margin-right: 1rem;
    width: 20px;
    text-align: center;
}

.contact-details li a {
    color: #333;
    transition: color 0.3s ease;
}

.contact-details li a:hover {
    color: #007bff;
}

/* Contact Form */
#contact-form .form-group {
    margin-bottom: 1.5rem;
}

#contact-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    color: #555;
}

#contact-form input[type="text"],
#contact-form input[type="email"],
#contact-form textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
}

#contact-form textarea {
    resize: vertical; /* Allow vertical resizing */
}

#contact-form button[type="submit"] {
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
}

.form-note {
    font-size: 0.8rem;
    color: #777;
    margin-top: 1rem;
    text-align: center;
}

/* Scroll Animation */
.hidden {
    opacity: 0;
    transform: translateY(30px); /* Slightly more travel */
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    will-change: opacity, transform;
}

.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Add more styles as we build */

/* Responsive Design */
@media (max-width: 768px) {
    /* ... existing responsive styles ... */

    .skills-grid {
        grid-template-columns: 1fr; /* Stack skill categories */
        gap: 1.5rem;
    }

    .skill-category {
        padding: 1rem;
    }

     .language-skills {
        margin-top: 1.5rem;
        padding-top: 1.5rem;
    }

    .honors-container {
        grid-template-columns: 1fr; /* Stack sections */
        gap: 2rem;
    }

     .certificates-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 0.75rem;
    }
    .certificate-item {
        padding: 0.75rem;
    }
     .certificate-item i {
        font-size: 2rem;
        margin-bottom: 0.5rem;
    }
      .certificate-item span {
        font-size: 0.8rem;
    }

    .contact-container {
        grid-template-columns: 1fr; /* Stack columns */
        gap: 2rem;
    }

    #contact-form {
        margin-top: 2rem;
    }

    .publications li,
    .patents-copyrights li {
        align-items: center; /* Better alignment on mobile? */
    }
    .publications li > i,
    .patents-copyrights li > i {
         margin-top: 0;
    }

}

@media (max-width: 1024px) {
    /* ... existing responsive styles ... */
    .project-grid {
         grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }

     .honors-container {
        gap: 2rem;
    }
}

/* Section Hover Effects */
main > section {
    transition: transform 0.4s ease-out, box-shadow 0.4s ease-out;
    border-radius: 8px; /* Optional: round corners slightly for shadow */
    margin-bottom: 1rem; /* Add space between sections if needed */
    position: relative; /* Needed for potential pseudo-elements or z-index */
    z-index: 1; /* Ensure sections stack correctly if overlapping */
}

main > section:hover {
    transform: scale(1.01); /* Slightly enlarge */
    /* transform: translateY(-5px); */ /* Alternative: slight lift */
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1); /* Soft shadow */
    z-index: 2; /* Bring hovered section to front */
}

/* Exclude hero section from this specific hover if desired */
main > section#hero:hover {
    transform: none;
    box-shadow: none;
    z-index: 1;
}

/* Ensure background pseudo-elements don't interfere */
main > section#education:hover, main > section#experience:hover {
     /* Keep transform from section:hover or define specific */
     transform: scale(1.01);
     box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
     z-index: 2;
}

/* --- End of File --- */ 

/* Projects Section Styles */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 20px rgba(0, 123, 255, 0.2);
}

.project-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 1px solid #eee;
}

.project-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-content h3 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    color: #333;
    font-size: 1.3rem;
}

.project-content p {
    margin-bottom: 1.5rem;
    color: #555;
    font-size: 0.95rem;
    flex-grow: 1;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 1rem;
    gap: 0.5rem;
}

.tag {
    font-size: 0.8rem;
    padding: 0.3rem 0.6rem;
    border-radius: 20px;
    font-weight: 600;
}

.iot-tag {
    background-color: #e3f2fd;
    color: #0d47a1;
}

.ml-tag {
    background-color: #e8f5e9;
    color: #1b5e20;
}

.image-tag {
    background-color: #fff3e0;
    color: #e65100;
}

.nlp-tag {
    background-color: #f3e5f5;
    color: #4a148c;
}

.rec-tag {
    background-color: #e0f7fa;
    color: #006064;
}

.tech-stack-icons {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.tech-stack-icons i {
    font-size: 1.4rem;
    color: #777;
    transition: color 0.3s ease, transform 0.3s ease;
}

.tech-stack-icons i:hover {
    color: #007bff;
    transform: scale(1.2);
}

.project-modal-trigger {
    align-self: flex-start;
    margin-top: auto;
}

/* Project filters */
.project-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin: 1.5rem 0 2rem;
}

.filter-btn {
    background: #f0f0f0;
    border: none;
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 500;
    color: #555;
    transition: all 0.3s ease;
}

.filter-btn:hover, .filter-btn.active {
    background: #007bff;
    color: white;
}

@media (max-width: 768px) {
    .project-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .project-card img {
        height: 180px;
    }
    
    .project-content {
        padding: 1.2rem;
    }
}