:root {
    --primary-color: #10b981;
    --primary-light: #6ee7b7;
    --primary-dark: #059669;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-light-2: #f1f5f9;
    --text-dark: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border-light: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
}

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

html {
    scroll-behavior: smooth;
}

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

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

/* Navigation */
.navbar {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-light);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

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

.logo {
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 700;
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 600px;
    background: linear-gradient(135deg, var(--bg-light) 0%, #e0f2fe 100%);
    padding: 60px 20px;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    width: 100%;
}

.hero-left {
    animation: slideInLeft 0.8s ease;
}

.hero-badge {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.hero-name {
    font-size: 4rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    line-height: 1.1;
}

.hero-title {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero-contact {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.hero-contact p {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hero-contact i {
    color: var(--primary-color);
    width: 20px;
}

.social-icons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-icons a {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1.2rem;
}

.social-icons a:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}

.hero-right {
    animation: slideInRight 0.8s ease;
}

.profile-circle {
    width: 400px;
    height: 400px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--bg-light-2);
    border: 8px solid var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    box-shadow: var(--shadow-lg);
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* About Section */
.about {
    padding: 80px 20px;
    background: var(--bg-light);
}

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

.about-left {
    display: flex;
    justify-content: center;
}

.about-illustration {
    width: 300px;
    height: 300px;
    background: var(--primary-light);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    color: var(--primary-color);
}

.about-right h2 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

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

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
    padding: 2rem;
    background: var(--bg-white);
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.stat h3 {
    font-size: 2.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

.stat p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* Skills Section */
.skills {
    padding: 80px 20px;
    background: var(--bg-white);
}

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

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

.skill-group {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.skill-group:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.skill-group h3 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.skill-item {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* Experience Section */
.experiences {
    padding: 80px 20px;
    background: var(--bg-light);
}

.experience-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 2rem;
    border-left: 5px solid var(--primary-color);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.experience-card:hover {
    box-shadow: var(--shadow-lg);
}

.exp-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.exp-header h3 {
    font-size: 1.4rem;
    color: var(--text-dark);
    font-weight: 700;
}

.exp-date {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
}

.company {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.05rem;
    margin-bottom: 1rem;
}

.exp-highlights {
    list-style: none;
    color: var(--text-secondary);
    line-height: 1.8;
}

.exp-highlights li {
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
}

.exp-highlights li:before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Portfolio Section */
.portfolio {
    padding: 80px 20px;
    background: var(--bg-white);
}

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

.portfolio-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

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

.portfolio-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.portfolio-card h3 {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-weight: 700;
}

.portfolio-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.portfolio-tags span {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Certifications Section */
.certifications {
    padding: 80px 20px;
    background: var(--bg-light);
}

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

.cert-category {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.cert-category h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
}

.cert-list {
    list-style: none;
    color: var(--text-secondary);
}

.cert-list li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
}

.cert-list li i {
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Contact Section */
.contact {
    padding: 80px 20px;
    background: var(--bg-white);
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.contact-info h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

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

.contact-item .label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

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

.social-contact {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-contact a {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1.3rem;
}

.social-contact a:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* Solved Problems Section */
.solved-problems {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

.solved-problems .section-title {
    color: var(--text-dark);
    margin-bottom: 10px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 50px;
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.problem-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.problem-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.problem-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.problem-card h3 {
    color: var(--text-dark);
    font-size: 1.2rem;
    margin: 10px 0;
}

.problem-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    flex-grow: 1;
}

.problem-card code {
    background: var(--bg-light-2);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--primary-dark);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

/* Tools & Technology Section */
.tools {
    padding: 80px 20px;
    background: var(--bg-white);
}

.tools .section-title {
    color: var(--text-dark);
    margin-bottom: 10px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 50px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.tool-category {
    background: var(--bg-light);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
}

.tool-category:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
    border-color: var(--primary-color);
}

.tool-category h3 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
}

.tool-items {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tool-badge {
    background: linear-gradient(135deg, var(--primary-light) 0%, #a7f3d0 100%);
    color: var(--primary-dark);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
    transition: all 0.3s ease;
    border: 1px solid var(--primary-color);
}

.tool-badge:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.05);
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    text-align: center;
    padding: 2rem;
}

/* Animations */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-white);
        padding: 1rem;
        gap: 0;
    }

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

    .nav-menu li {
        border-bottom: 1px solid var(--border-light);
    }

    .nav-menu a {
        display: block;
        padding: 1rem;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .profile-circle {
        width: 300px;
        height: 300px;
    }

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

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

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

    .problems-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .problem-card {
        padding: 20px;
    }

    .tools-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .tool-category {
        padding: 15px;
    }

    .exp-header {
        flex-direction: column;
        gap: 1rem;
    }

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

@media (max-width: 480px) {
    .hero-name {
        font-size: 2rem;
    }

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

    .profile-circle {
        width: 200px;
        height: 200px;
    }

    .about-illustration {
        width: 200px;
        height: 200px;
        font-size: 4rem;
    }

    .nav-menu {
        gap: 0;
    }

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