:root {
    /* Light Mode Colors */
    --background-color: #f5f5f5;
    --content-background: #ffffff;
    --text-color: #333;
    --text-secondary: #555;
    --text-muted: #666;
    --accent-color: #0a66c2;
    --accent-light: #e9f5ff;
    --card-background: #f9f9f9;
    --border-color: #ddd;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    --header-text: #0a66c2;
    --skill-tag-bg: #e9f5ff;
    --skill-tag-text: #0a66c2;
    --project-link-bg: #0a66c2;
    --project-link-text: white;
}

[data-theme="dark"] {
    /* Dark Mode Colors */
    --background-color: #121212;
    --content-background: #1a1a1a; /* Darker for contrast */
    --text-color: #e8e8e8;
    --text-secondary: #bbbbbb;
    --text-muted: #999999;
    --accent-color: #4d9eff;
    --accent-light: #1f3a57;
    --card-background: #222222;
    --border-color: #444444;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
    --header-text: #4d9eff;
    --skill-tag-bg: #1f3a57;
    --skill-tag-text: #4d9eff;
    --project-link-bg: #4d9eff;
    --project-link-text: #121212;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.content {
    margin: 20px auto;
    width: 100%;
    max-width: 1100px;
    min-height: 90vh;
    box-shadow: var(--box-shadow);
    background-color: var(--content-background);
    border-radius: 8px;
    overflow: hidden;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    position: relative;
    z-index: 1;
    overflow: hidden;
    min-height: 70px;
} 

.navbar-name {
    color: var(--header-text);
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
    text-align: left;
    padding-left: 10px;
    flex: 1;
    word-wrap: break-word;
    hyphens: auto;
}

/* Theme toggle styling */
.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.theme-toggle-label {
    position: relative;
    display: inline-block;
    width: 36px; 
    height: 18px;
    cursor: pointer;
}

.theme-toggle-checkbox {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    border-radius: 18px;
    transition: 0.4s;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 12px; 
    width: 12px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: 0.4s;
}

.theme-toggle-checkbox:checked + .toggle-slider {
    background-color: #4d9eff;
}

.theme-toggle-checkbox:checked + .toggle-slider:before {
    transform: translateX(18px); 
}

.toggle-icon {
    color: var(--text-color);
    font-size: 14px; 
}

.header-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
    padding: 30px 20px;
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.header-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* background: url(assets/penn-banner2.jpeg) center/cover no-repeat; */
    filter: blur(0.5px);
    z-index: -1;
}

.left-info {
    flex: 1 1 300px;
    min-width: 280px;
    max-width: 100%;
    text-align: left;
}

.left-info h1 {
    color: var(--header-text);
    font-size: clamp(1.8rem, 5vw, 2.2rem);
    margin-bottom: 15px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
    text-align: left;
    word-wrap: break-word;
    hyphens: auto;
    line-height: 1.2;
}

.left-info p {
    margin: 8px 0;
    color: var(--text-color);
    display: flex;
    align-items: center;
    font-size: clamp(0.85rem, 2vw, 0.9rem);
    gap: 8px;
    text-align: left;
    flex-wrap: wrap;
    word-break: break-word;
}

.left-info i {
    margin-left: 0;
    flex-shrink: 0;
}

.left-info a {
    color: var(--text-color);
    text-decoration: none;
    font-size: clamp(0.85rem, 2vw, 0.9rem);
    transition: all 0.2s ease;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
    word-break: break-all;
}

.left-info a:hover {
    text-decoration: underline;
    color: var(--text-color);
}

.left-info .links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
    margin-top: 15px;
}
  
.left-info .links a {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-color);
    text-decoration: none;
    font-size: clamp(0.85rem, 2vw, 0.9rem);
    transition: all 0.2s ease;
    white-space: nowrap;
}
  
.left-info .links a:hover {
    color: var(--text-color);
    text-decoration: underline;
}
  
.left-info .links i {
    font-size: 0.95rem;
    flex-shrink: 0;
}

.photo {
    width: 180px;
    height: 200px;
    border-radius: 8px;
    border: 4px solid #ffffff;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.photo:hover {
    transform: scale(1.03);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

.photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.tabs {
    display: flex;
    justify-content: space-around;
    background-color: var(--content-background);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.tab-buttons {
    display: flex;
    width: 100%;
    overflow-x: auto;
    scrollbar-width: thin;
}

.tab-buttons::-webkit-scrollbar {
    height: 4px;
}

.tab-buttons::-webkit-scrollbar-thumb {
    background-color: var(--accent-color);
    border-radius: 4px;
}

.tab-buttons button {
    flex: 1;
    padding: 12px 16px;
    background: none;
    border: none;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
    min-width: max-content;
    color: var(--text-color);
}

.tab-buttons button:hover,
.tab-buttons button.active {
    background-color: var(--accent-light);
    font-weight: bold;
    border-bottom: 3px solid var(--accent-color);
    color: var(--accent-color);
}

.tab-dropdown {
    display: none;
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--content-background);
    color: var(--text-color);
    font-size: 16px;
    margin: 10px 0;
    cursor: pointer;
}

.section {
    display: none;
    padding: 30px;
    background-color: var(--content-background);
    min-height: 55vh;
}

.section.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.section h2 {
    color: var(--accent-color);
    margin-bottom: 20px;
    border-bottom: 2px solid var(--accent-light);
    padding-bottom: 10px;
}

.card {
    background-color: var(--card-background);
    padding: 20px;
    margin: 15px 0;
    border-left: 4px solid var(--accent-color);
    border-radius: 6px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.card h6 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    color: var(--text-color);
}

.card p {
    margin: 8px 0 0 0;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    color: var(--text-secondary);
}

.card p a {
color:var(--text-color)
}

.card span {
    color: var(--text-muted);
    font-size: 0.9em;
}

/* Project Cards Styling */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.project-card {
    background-color: var(--card-background);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    aspect-ratio: 1/1; /* Makes the card square */
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    border-top: 4px solid var(--accent-color);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.project-link {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--project-link-bg);
    color: var(--project-link-text);
    padding: 5px 10px;
    font-size: 12px;
    border-bottom-left-radius: 8px;
}

.project-card h3 {
    margin-top: 10px;
    margin-bottom: 12px;
    font-size: 18px;
    color: var(--text-color);
    line-height: 1.3;
}

.project-card p {
    font-size: 14px;
    color: var(--text-secondary);
    flex-grow: 1;
    overflow-y: auto;
}

ul {
    list-style-position: inside;
    padding-left: 10px;
}

ul li {
    margin-bottom: 12px;
    text-align: justify;
    color: var(--text-secondary);
}

ul li a {
    color: var(--accent-color);
    text-decoration: none;
}

ul li a:hover {
    text-decoration: underline;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.skill-category {
    background-color: var(--card-background);
    padding: 15px;
    border-radius: 6px;
    border-left: 4px solid var(--accent-color);
}

.skill-category h3 {
    color: var(--text-color);
    margin-bottom: 10px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    background-color: var(--skill-tag-bg);
    color: var(--skill-tag-text);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 14px;
}

/* Responsive styles */
@media (max-width: 992px) {
    .content {
        max-width: 90%;
        margin: 15px auto;
    }
    
    .navbar {
        padding: 15px;
    }
    
    .navbar-name {
        padding-left: 5px;
    }
    
    .header-content {
        padding: 25px 15px;
        gap: 15px;
    }
    
    .left-info {
        flex: 1 1 100%;
        min-width: 250px;
    }
    
    .photo {
        align-self: center;
        margin-top: 10px;
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }
    
    .tab-buttons button {
        padding: 10px 12px;
        font-size: 14px;
    }
}

@media (max-width: 768px) {
    .content {
        max-width: 95%;
        margin: 10px auto;
    }

    .navbar {
        padding: 10px 15px;
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        min-height: auto;
    }

    .navbar-name {
        font-size: clamp(1.4rem, 6vw, 1.8rem);
        padding-left: 0;
        width: 100%;
        margin-bottom: 5px;
    }

    .theme-toggle {
        position: relative;
        top: auto;
        right: auto;
        align-self: flex-end;
        margin-top: -10px;
    }

    .header-content {
        flex-direction: column;
        align-items: center;
        padding: 20px 15px;
        text-align: center;
    }

    .left-info {
        text-align: center;
        max-width: 100%;
        order: 2;
    }

    .left-info h1 {
        text-align: center;
        margin-bottom: 20px;
    }

    .left-info p {
        justify-content: center;
        text-align: center;
        margin: 10px 0;
    }

    .left-info .links {
        justify-content: center;
        margin-top: 20px;
    }

    .photo {
        order: 1;
        margin-bottom: 20px;
        width: 160px;
        height: 180px;
    }

    .tab-buttons {
        display: none;
    }

    .tab-dropdown {
        display: block;
        margin: 10px 15px;
        width: calc(100% - 30px);
    }

    .section {
        padding: 20px 15px;
    }

    .card h6 {
        flex-direction: column;
        align-items: flex-start;
    }

    .card h6 span {
        margin-top: 5px;
        font-size: 0.8em;
    }

    .card p {
        flex-direction: column;
    }

    .card p span {
        margin-top: 5px;
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 15px;
    }
    
    .project-card h3 {
        font-size: 16px;
        margin-top: 15px;
    }
    
    .project-card p {
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .navbar {
        padding: 10px;
    }

    .navbar-name {
        font-size: clamp(1.2rem, 7vw, 1.5rem);
        line-height: 1.1;
    }

    .header-content {
        padding: 15px 10px;
    }

    .left-info {
        padding: 0 5px;
    }

    .left-info p {
        font-size: 0.85rem;
        margin: 8px 0;
    }

    .left-info .links a {
        font-size: 0.8rem;
        gap: 4px;
    }

    .photo {
        width: 140px;
        height: 160px;
    }

    .card {
        padding: 15px;
    }

    .section {
        padding: 15px 10px;
    }

    .section h2 {
        font-size: 1.4rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .project-card {
        aspect-ratio: auto;
        min-height: 200px;
        padding: 15px;
    }

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

@media (max-width: 320px) {
    .navbar-name {
        font-size: 1.1rem;
    }
    
    .left-info h1 {
        font-size: 1.3rem;
    }
    
    .photo {
        width: 120px;
        height: 140px;
    }
    
    .left-info p,
    .left-info a,
    .left-info .links a {
        font-size: 0.8rem;
    }
}