/* ========================
   Global Styles
   ======================== */

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --text-dark: #333;
    --text-light: #666;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-light);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================
   Navigation / Hamburger Menu
   ======================== */

.navbar {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.nav-logo:hover {
    opacity: 0.8;
}

.nav-menu {
    display: none;
    list-style: none;
    position: fixed;
    left: -100%;
    top: 3.5rem;
    flex-direction: column;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    width: 100%;
    text-align: center;
    transition: 0.3s;
    padding: 2rem 0;
}

.nav-menu.active {
    left: 0;
    display: flex;
}

.nav-item {
    padding: 1rem 0;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    transition: var(--transition);
}

.nav-link:hover {
    opacity: 0.7;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

/* Hamburger Menu Icon */
.hamburger {
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 5px 0;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-7px, -6px);
}

/* Desktop Navigation */
@media screen and (min-width: 768px) {
    .hamburger {
        display: none;
    }

    .nav-menu {
        display: flex;
        position: static;
        flex-direction: row;
        width: auto;
        background: transparent;
        padding: 0;
        justify-content: flex-end;
        gap: 2rem;
    }

    .nav-item {
        padding: 0;
    }
}

/* ========================
   Main Content
   ======================== */

.main-content {
    min-height: calc(100vh - 200px);
    padding-top: 2rem;
}

/* ========================
   Hero Section
   ======================== */

.hero-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 6rem 2rem;
    text-align: center;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: slideInDown 0.6s ease;
}

.hero-content p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: slideInUp 0.6s ease;
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================
   CTA Button
   ======================== */

.cta-button {
    display: inline-block;
    background: white;
    color: var(--primary-color);
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.cta-button:hover {
    background: var(--bg-light);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.cta-button i {
    margin-right: 0.5rem;
}

/* ========================
   Stats Section
   ======================== */

.stats-section {
    padding: 4rem 2rem;
    background: white;
}

.stats-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: var(--transition);
    border-left: 4px solid var(--primary-color);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-light);
    font-size: 1rem;
}

/* ========================
   Visualizations Section
   ======================== */

.visualizations-section {
    padding: 4rem 2rem;
    background: var(--bg-light);
}

.visualizations-section h2,
.projects-section h2,

.github-section h2,
.about-section h2,
.cta-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

.visualizations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.viz-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.viz-card:hover {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transform: translateY(-5px);
}

.viz-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.chart-container {
    position: relative;
    height: 300px;
    margin-bottom: 1rem;
}

/* ========================
   About Section
   ======================== */

.about-section {
    padding: 4rem 2rem;
    background: white;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
    color: var(--text-light);
}

.skills-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.skills-list li {
    background: var(--bg-light);
    padding: 1rem;
    border-radius: 5px;
    border-left: 4px solid var(--secondary-color);
    transition: var(--transition);
}

.skills-list li:hover {
    background: var(--primary-color);
    color: white;
    transform: translateX(5px);
}

/* ========================
   CTA Section
   ======================== */

.cta-section {
    padding: 4rem 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-align: center;
}

.cta-section h2 {
    color: white;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* ========================
   Page Header
   ======================== */

.page-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 3rem 2rem;
    text-align: center;
    border-bottom: 5px solid rgba(255, 255, 255, 0.1);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.page-header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ========================
   Projects Section
   ======================== */

.projects-section {
    padding: 4rem 2rem;
    background: var(--bg-light);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.project-card img {
  width: 100%;
  object-fit: cover;
}


.project-card:hover {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    transform: translateY(-5px);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    gap: 1rem;
}

.project-header h2 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin: 0;
}

.github-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    white-space: nowrap;
    transition: var(--transition);
}
.github-button{
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    margin: 10px;
}
.github-button:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.github-link:hover {
    opacity: 0.7;
}

.project-description {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.notebooks-section h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.notebooks-list {
    list-style: none;
}

.notebooks-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.notebooks-list li:last-child {
    border-bottom: none;
}

.notebook-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.notebook-link:hover {
    opacity: 0.7;
    padding-left: 0.5rem;
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
}

/* ========================
   GitHub Section
   ======================== */

.github-section {
    padding: 3rem 2rem;
    background: white;
    text-align: center;
}

.github-section h2 {
    color: var(--primary-color);
}

.github-section p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

/* ========================
   Contact Section
   ======================== */

.contact-section {
    padding: 4rem 2rem;
    background: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
}

.contact-form-wrapper,
.contact-info-wrapper {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.contact-form-wrapper h2,
.contact-info-wrapper h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.form-text {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 0.25rem;
}

.text-muted {
    color: #999 !important;
}

.submit-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.8rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.form-message {
    padding: 1rem;
    border-radius: 5px;
    margin: 1rem 0;
    font-weight: 500;
    animation: slideIn 0.3s ease;
}

.form-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.error {
    color: #e74c3c;
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.info-item i {
    color: var(--primary-color);
    font-size: 1.5rem;
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.info-item h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.info-item h3 a{
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.info-item a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

.info-item a:hover {
    color: var(--primary-color);
}

.map-placeholder {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 5px;
    text-align: center;
    margin-top: 1rem;
}

.map-placeholder i {
    font-size: 2rem;
    color: var(--primary-color);
    display: block;
    margin-bottom: 0.5rem;
}

/* ========================
   Success Section
   ======================== */

.success-section {
    padding: 4rem 2rem;
    background: white;
}

.success-card {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 3rem;
    border-radius: 10px;
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
}

.success-card i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.success-card h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.success-card p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* ========================
   Footer
   ======================== */

.footer {
    background: #2c3e50;
    color: white;
    padding: 2rem;
    text-align: center;
    margin-top: 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content p {
    margin-bottom: 1rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-3px);
}

/* ========================
   Responsive Design
   ======================== */

@media screen and (max-width: 768px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1.1rem;
    }

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

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

    .project-header {
        flex-direction: column;
        align-items: flex-start;
    }

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

    .page-header h1 {
        font-size: 1.8rem;
    }

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

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

@media screen and (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.5rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .container {
        padding: 0 10px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    .page-header p {
        font-size: 0.95rem;
    }
}