/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #FF9900;
    --primary-dark: #E88B00;
    --secondary-color: #232F3E;
    --accent-color: #146EB4;
    --accent-light: #3B8FD8;
    --success-color: #00A86B;
    --text-dark: #1a1a1a;
    --text-medium: #4a4a4a;
    --text-light: #666;
    --bg-light: #F8F9FA;
    --bg-gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --bg-gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --bg-gradient-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --card-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --white: #FFFFFF;
    --shadow: 0 4px 15px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --shadow-colored: 0 8px 25px rgba(102, 126, 234, 0.25);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Improve touch targets for mobile */
a, button, .btn {
    -webkit-tap-highlight-color: rgba(102, 126, 234, 0.2);
}

/* Smooth scrolling for all devices */
* {
    -webkit-overflow-scrolling: touch;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-profile-pic {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--secondary-color);
    filter: grayscale(100%);
    transition: all 0.3s ease;
}

.nav-profile-pic:hover {
    filter: grayscale(0%);
    transform: scale(1.1);
    border-color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 0;
    display: block;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--secondary-color);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* Hero Section */
.hero {
    padding: 150px 0 100px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.profile-image-container {
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease;
}

.profile-image {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--white);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.profile-image:hover {
    transform: scale(1.05);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-subtitle {
    font-size: 1.8rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2.5rem;
    opacity: 0.85;
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
    animation: fadeInUp 0.8s ease 0.8s backwards;
}

.btn {
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, #FF9900 0%, #ff6b00 100%);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(255, 153, 0, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #ff6b00 0%, #FF9900 100%);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 153, 0, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--secondary-color);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 3rem;
    animation: fadeInUp 0.8s ease 1s backwards;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    opacity: 0.8;
    margin-top: 0.5rem;
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--secondary-color);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* About Section */
.about {
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-light);
}

.about-info {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.info-item {
    display: flex;
    flex-direction: column;
    margin-bottom: 1.5rem;
}

.info-label {
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 0.3rem;
}

.info-value {
    color: var(--text-light);
}

.info-value a {
    color: var(--accent-color);
    text-decoration: none;
}

.info-value a:hover {
    text-decoration: underline;
}

/* Experience Section */
.experience {
    background: var(--white);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 3rem;
}

.timeline-marker {
    position: absolute;
    left: 11px;
    top: 0;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: 4px solid var(--white);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.timeline-content {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-content:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-lg);
}

.timeline-header h3 {
    font-size: 1.4rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.company {
    display: block;
    font-size: 1.1rem;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.period {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    margin-right: 0.5rem;
    font-weight: 500;
}

.location {
    display: inline-block;
    color: var(--text-light);
    font-size: 0.9rem;
}

.timeline-details {
    margin-top: 1rem;
    padding-left: 1.5rem;
}

.timeline-details li {
    margin-bottom: 0.8rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* Skills Section */
.skills {
    background: var(--bg-light);
}

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

.skill-category {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border-top: 3px solid transparent;
    background-image: linear-gradient(white, white), linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-origin: border-box;
    background-clip: padding-box, border-box;
}

.skill-category:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-colored);
}

.skill-category h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: var(--bg-light);
    color: var(--text-dark);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid #e0e0e0;
    transition: all 0.3s ease;
}

.tag:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Achievements Section */
.achievements {
    background: var(--white);
}

/* Education Section */
.education {
    background: var(--bg-light);
}

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

.education-card {
    background: var(--white);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    display: flex;
    gap: 2rem;
    align-items: start;
    transition: all 0.3s ease;
    border-left: 5px solid transparent;
    border-image: linear-gradient(135deg, #667eea 0%, #764ba2 100%) 1;
}

.education-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-colored);
}

.education-icon {
    font-size: 4rem;
    flex-shrink: 0;
}

.education-details h3 {
    color: var(--secondary-color);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.university {
    color: var(--accent-color);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.education-period {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.education-description {
    color: var(--text-light);
    line-height: 1.8;
    margin-top: 1rem;
}

/* Achievements Section */
.achievements {
    background: var(--white);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.achievement-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.achievement-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
}

.achievement-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-colored);
}

.achievement-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.achievement-card h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.achievement-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* Certifications Section */
.certifications {
    background: var(--bg-light);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.cert-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border-left: 4px solid var(--accent-color);
    position: relative;
    overflow: hidden;
}

.cert-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
}

.cert-card.featured {
    background: linear-gradient(135deg, #fff 0%, #f8f9ff 100%);
    border-left: none;
}

.cert-card.featured::before {
    width: 5px;
    background: linear-gradient(180deg, #FF9900 0%, #ff6b00 100%);
}

.cert-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-colored);
}

.cert-badge {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.cert-card.featured .cert-badge {
    background: linear-gradient(135deg, #FF9900 0%, #ff6b00 100%);
}

.cert-card h3 {
    color: var(--secondary-color);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.cert-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Contact Section */
.contact {
    background: var(--white);
}

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

.contact-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    line-height: 1.8;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-method {
    display: flex;
    align-items: start;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--white);
    border-radius: 15px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.contact-method:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-colored);
}

.method-icon {
    font-size: 2rem;
}

.method-details h4 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.method-details a {
    color: var(--accent-color);
    text-decoration: none;
}

.method-details a:hover {
    text-decoration: underline;
}

.method-details p {
    color: var(--text-light);
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #232F3E 0%, #1a252f 100%);
    color: var(--white);
    text-align: center;
    padding: 2rem 0;
}

.footer p {
    margin: 0.5rem 0;
    opacity: 0.8;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 968px) {
    .container {
        padding: 0 20px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

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

    .cert-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
        gap: 0;
    }

    .nav-menu li {
        margin: 0.5rem 0;
    }

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

    .hamburger {
        display: flex;
    }

    .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(8px, -8px);
    }

    .hero {
        padding: 120px 0 80px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.4rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    .profile-image {
        width: 150px;
        height: 150px;
    }

    .nav-profile-pic {
        width: 35px;
        height: 35px;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-text p {
        font-size: 1rem;
    }

    .timeline::before {
        left: 10px;
    }

    .timeline-item {
        padding-left: 40px;
    }

    .timeline-marker {
        left: 1px;
    }

    .timeline-content {
        padding: 1.5rem;
    }

    .timeline-header h3 {
        font-size: 1.2rem;
    }

    .company {
        font-size: 1rem;
    }

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

    .skill-category {
        padding: 1.5rem;
    }

    .education-card {
        flex-direction: column;
        text-align: center;
        padding: 2rem;
    }

    .education-icon {
        font-size: 3rem;
    }

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

    section {
        padding: 60px 0;
    }

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

    .achievement-card {
        padding: 2rem;
    }

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

@media (max-width: 480px) {
    .navbar .container {
        padding: 0.8rem 15px;
    }

    .nav-brand {
        font-size: 1.2rem;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 2rem;
        line-height: 1.2;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-description {
        font-size: 0.95rem;
        line-height: 1.6;
    }

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

    .stat-label {
        font-size: 0.85rem;
    }

    .container {
        padding: 0 15px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
        width: 100%;
    }

    .profile-image {
        width: 120px;
        height: 120px;
    }

    .nav-profile-pic {
        width: 30px;
        height: 30px;
    }

    .nav-brand {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .about-text p {
        font-size: 0.95rem;
    }

    .info-item {
        margin-bottom: 1rem;
    }

    .info-label {
        font-size: 0.9rem;
    }

    .info-value {
        font-size: 0.9rem;
    }

    .timeline-content {
        padding: 1.25rem;
    }

    .timeline-header h3 {
        font-size: 1.1rem;
    }

    .company {
        font-size: 0.95rem;
    }

    .period {
        font-size: 0.75rem;
        padding: 4px 10px;
    }

    .timeline-details {
        padding-left: 1rem;
    }

    .timeline-details li {
        font-size: 0.9rem;
        margin-bottom: 0.6rem;
    }

    .skill-category h3 {
        font-size: 1.1rem;
    }

    .tag {
        font-size: 0.8rem;
        padding: 5px 12px;
    }

    .achievement-card {
        padding: 1.5rem;
    }

    .achievement-icon {
        font-size: 2.5rem;
    }

    .achievement-card h3 {
        font-size: 1.2rem;
    }

    .achievement-card p {
        font-size: 0.9rem;
    }

    .education-card {
        padding: 1.5rem;
    }

    .education-icon {
        font-size: 2.5rem;
    }

    .education-details h3 {
        font-size: 1.3rem;
    }

    .university {
        font-size: 1.1rem;
    }

    .education-description {
        font-size: 0.9rem;
    }

    .cert-card {
        padding: 1.5rem;
    }

    .cert-card h3 {
        font-size: 1rem;
    }

    .cert-card p {
        font-size: 0.85rem;
    }

    .contact-intro {
        font-size: 1rem;
    }

    .contact-method {
        padding: 1.25rem;
    }

    .method-icon {
        font-size: 1.75rem;
    }

    .method-details h4 {
        font-size: 1rem;
    }

    .method-details a,
    .method-details p {
        font-size: 0.9rem;
    }

    .footer {
        padding: 1.5rem 0;
    }

    .footer p {
        font-size: 0.9rem;
    }
}

@media (max-width: 360px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .profile-image {
        width: 100px;
        height: 100px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
}