/* Base styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-bg: #f5f6fa;
    --card-bg: #ffffff;
    --border-color: #dcdde1;
    --page-bg: #ffffff;
    --section-spacing: 3rem;
    --card-spacing: 1.5rem;
    --content-spacing: 1rem;
    --container-width: 1200px;
    --content-width: 800px;
    transition: all 0.3s ease-in-out;
}

/* Tailwind Components */
@layer components {
    .section-title {
        @apply text-4xl font-bold tracking-tight text-gray-800 dark:text-white;
    }

    /* Experience timeline */
    .dot {
        @apply absolute left-1/2 -ml-[18px] top-0 h-9 w-9 rounded-full border-4 border-white bg-blue-600 shadow-md dark:border-gray-900;
    }
    .card {
        @apply mt-2 rounded-xl bg-[#f9fafb] dark:bg-[#16192b]
               p-6 shadow-lg ring-1 ring-gray-100 dark:ring-0 text-slate-800 dark:text-slate-100;
    }
    .role { @apply text-xl font-bold; }
    .org { @apply text-sm font-medium text-slate-500 dark:text-slate-400; }
    .date { @apply mt-1 mb-3 text-xs text-blue-500; }
    .list { @apply list-disc list-outside space-y-1 pl-4 text-sm; }
}

/* Timeline Alternating Layout */
@layer utilities {
    @media (min-width: 768px) {
        .timeline article:nth-child(even) { 
            left: 50%; 
            padding-left: 24px; 
            padding-right: 0; 
        }
        .timeline article:nth-child(even) .dot { 
            left: -18px; 
        }
        /* Arrow pointers */
        .timeline article:nth-child(even) .card::before {
            content: '';
            position: absolute;
            left: -8px;
            top: 28px;
            border-width: 8px 8px 8px 0;
            border-style: solid;
            border-color: transparent #16192b transparent transparent;
        }
        .timeline article:nth-child(odd) .card::before {
            content: '';
            position: absolute;
            right: -8px;
            top: 28px;
            border-width: 8px 0 8px 8px;
            border-style: solid;
            border-color: transparent transparent transparent #16192b;
        }
    }
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--page-bg);
    transition: background-color 0.3s ease-in-out;
}

/* Layout */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--content-spacing);
    width: 100%;
}

.content-wrapper {
    max-width: var(--content-width);
    margin: 0 auto;
    width: 100%;
    text-align: center;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 1rem;
    background-color: var(--card-bg);
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-links {
    display: flex;
    gap: 1rem;
}

.nav-links button {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.nav-links button:hover {
    color: var(--accent-color);
}

.hamburger-menu {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--text-color);
}

/* Sections */
section {
    padding: var(--section-spacing) 0;
    background-color: var(--page-bg);
    transition: background-color 0.3s ease-in-out;
    position: relative;
}

section:not(:last-child)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    max-width: 1000px;
    height: 1px;
    background-color: var(--border-color);
}

section:nth-child(even) {
    background-color: var(--light-bg);
}

.section h2 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: var(--content-spacing);
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    position: relative;
    padding-bottom: 1rem;
}

.section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--secondary-color);
    border-radius: 2px;
}

/* Home Section */
.home {
    padding-top: calc(var(--section-spacing) + 4rem);
    display: grid;
    grid-template-areas: 
        "title image"
        "subtitle image"
        "content content";
    grid-template-columns: 1fr auto;
    gap: var(--content-spacing);
    max-width: 1200px;
    margin: 0 auto;
    align-items: center;
}

.home-g1 {
    grid-area: title;
    align-self: start;
    padding-top: 2rem;
}

.home-g2 {
    grid-area: content;
}

.home-g3 {
    grid-area: image;
    justify-self: end;
    align-self: start;
    margin-top: 2rem;
}

.home-g4 {
    grid-area: content;
    margin-top: 2rem;
}

.home-g1 h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--secondary-color);
    font-size: 1.2rem;
    margin-top: 0;
}

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

.interests-list li {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.interests-list li::before {
    content: "•";
    color: var(--secondary-color);
    position: absolute;
    left: 0;
}

#profile-picture {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--secondary-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

#profile-picture:hover {
    transform: scale(1.05);
}

/* Cards */
.experience-card,
.project-card,
.achievement-card,
.lab-card,
.education-card {
    background: var(--card-bg);
    padding: var(--content-spacing);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: var(--card-spacing);
    width: 100%;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.experience-card:hover,
.project-card:hover,
.achievement-card:hover,
.lab-card:hover,
.education-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(0,0,0,0.15);
}

.experience-card h3,
.project-card h3,
.achievement-card h3,
.lab-card h3,
.education-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.experience-card p,
.project-card p,
.achievement-card p,
.lab-card p,
.education-card p {
    text-align: center;
    margin-bottom: 0.5rem;
}

.experience-card ul,
.project-card ul {
    text-align: left;
    display: inline-block;
    margin: 1rem auto;
    padding-left: 1.5rem;
}

.experience-card li,
.project-card li {
    margin: 0.5rem 0;
    position: relative;
    text-align: left;
}

.experience-card li::before,
.project-card li::before {
    content: "→";
    color: var(--secondary-color);
    position: absolute;
    left: -1.5rem;
}

.experience-card:last-child,
.project-card:last-child {
    margin-bottom: 0;
}

/* Project Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--card-spacing);
    width: 100%;
}

/* Grids */
.achievements-grid,
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--card-spacing);
    width: 100%;
}

/* Lists */
ul {
    list-style: none;
    padding-left: 1.5rem;
    margin: var(--content-spacing) 0;
}

li {
    margin: 0.5rem 0;
    position: relative;
}

li::before {
    content: "→";
    color: var(--secondary-color);
    position: absolute;
    left: -1.5rem;
}

/* Quick Links */
.quick-links {
    display: flex;
    gap: 1rem;
    margin-top: var(--content-spacing);
    justify-content: flex-start;
}

.quick-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: var(--secondary-color);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.quick-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

.quick-link::after {
    content: "→";
    transition: transform 0.3s ease;
}

.quick-link:hover::after {
    transform: translateX(4px);
}

/* Project Links */
.project-links {
    margin-top: var(--content-spacing);
    text-align: left;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: var(--secondary-color);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.project-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

.project-link::after {
    content: "→";
    transition: transform 0.3s ease;
}

.project-link:hover::after {
    transform: translateX(4px);
}

/* Social Links */
.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: var(--content-spacing);
}

.social-links a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.social-links a:hover {
    color: var(--secondary-color);
}

.img-link {
    width: 30px;
    height: 30px;
    margin-bottom: 0.5rem;
}

.src-link {
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: var(--content-spacing);
    margin-top: var(--section-spacing);
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --section-spacing: 2rem;
        --card-spacing: 1rem;
        --content-spacing: 0.75rem;
    }

    .container {
        padding: 0 var(--content-spacing);
    }

    .home {
        grid-template-areas: 
            "image"
            "title"
            "subtitle"
            "content";
        grid-template-columns: 1fr;
        text-align: center;
        gap: 1rem;
    }

    .home-g1 {
        padding-top: 1rem;
    }

    .home-g3 {
        justify-self: center;
        margin-top: 0;
    }

    .home-g4 {
        margin-top: 1rem;
    }

    #profile-picture {
        width: 220px;
        height: 220px;
    }

    .navbar {
        justify-content: space-between;
    }

    .hamburger-menu {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--card-bg);
        padding: 1rem;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links button {
        width: 100%;
        text-align: left;
        padding: 0.75rem 1rem;
    }

    .achievements-grid,
    .resources-grid {
        grid-template-columns: 1fr;
    }

    .quick-links {
        flex-wrap: wrap;
    }

    .social-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .section h2 {
        font-size: 2rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

section {
    animation: fadeIn 0.8s ease-out;
}

/* Dark Mode Styles */
[data-theme="dark"] {
    --primary-color: #93c5fd;
    --secondary-color: #60a5fa;
    --text-color: #e5e7eb;
    --light-bg: #1f2937;
    --card-bg: #111827;
    --border-color: #374151;
    --page-bg: #0f172a;
    transition: all 0.3s ease-in-out;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1001;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* Typing Animation */
.typing-text {
    display: inline-block;
    color: var(--secondary-color);
    min-height: 1.6em;
}

/* Documents Section */
.documents-section {
    padding: 2rem;
    background: var(--light-bg);
}

.document-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    transition: transform 0.2s ease;
}

.document-card:hover {
    transform: translateY(-2px);
}

.document-icon {
    width: 40px;
    height: 40px;
}

.document-info {
    flex: 1;
}

.document-title {
    font-weight: 600;
    color: var(--primary-color);
    margin: 0;
}

.document-description {
    color: var(--text-color);
    font-size: 0.9rem;
    margin: 0.5rem 0 0;
}

.download-button {
    background: var(--secondary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-decoration: none;
    transition: background-color 0.2s;
}

.download-button:hover {
    background: var(--primary-color);
}

/* Lab Section Styles */
.lab-section {
    padding: var(--section-spacing) 0;
    background-color: var(--light-bg);
}

.lab-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--content-spacing);
}

.lab-header {
    text-align: center;
    margin-bottom: 3rem;
}

.lab-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.lab-divider {
    width: 80px;
    height: 4px;
    background-color: var(--secondary-color);
    margin: 0 auto 2rem;
    border-radius: 2px;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.resource-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.resource-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.15);
}

.resource-card h3 {
    color: var(--primary-color);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.resource-card p {
    color: var(--text-color);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    opacity: 0.8;
}

.resource-link {
    color: var(--secondary-color);
    text-decoration: none;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.resource-link:hover {
    color: var(--primary-color);
}

.resource-link::after {
    content: "→";
    transition: transform 0.3s ease;
}

.resource-link:hover::after {
    transform: translateX(4px);
}

.lab-cta {
    text-align: center;
    margin-top: 3rem;
}

.lab-cta .project-link {
    padding: 0.75rem 2rem;
    font-size: 1rem;
    background-color: var(--secondary-color);
    color: white;
    border-radius: 8px;
    text-decoration: none;
    transition: background-color 0.3s ease, transform 0.3s ease;
    display: inline-block;
}

.lab-cta .project-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .resources-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .lab-header h2 {
        font-size: 2rem;
    }

    .resource-card {
        padding: 1.5rem;
    }

    .quick-links {
        flex-wrap: wrap;
    }
}

/* AOS Custom Styles */
[data-aos] {
    pointer-events: none;
}

[data-aos].aos-animate {
    pointer-events: auto;
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
}

/* About Section */
.about-section {
    text-align: left;
    padding: 1.5rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Only keep this override for the about image: */
#about img {
    max-width: 192px !important;
    max-height: 192px !important;
    min-width: 120px !important;
    min-height: 120px !important;
    border-radius: 50% !important;
    object-fit: cover !important;
    background: #fff !important;
    border: 4px solid #3b82f6 !important;
    box-shadow: 0 8px 32px 0 rgba(31,38,135,0.17);
}