:root {
    --color-primary: #8b5cf6;
    --color-primary-light: #a78bfa;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-background: #ffffff;
    --color-background-alt: #f9fafb;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.nav {
    height: 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--color-primary), var(--color-primary-light));
    -webkit-background-clip: text;
    color: transparent;
    text-decoration: none;
}

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

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
}

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

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

.social-links a {
    color: var(--color-text-light);
    transition: var(--transition);
}

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

.nav-toggle {
    display: none;
}


/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 5rem 0;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 4px solid var(--color-primary);
    padding: 4px;
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(to right, var(--color-primary), var(--color-primary-light));
    -webkit-background-clip: text;
    color: transparent;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-text-light);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--color-primary-light);
}

.btn-outline {
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

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

/* Projects Section */
.projects {
    padding: 5rem 0;
    background: var(--color-background-alt);
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
}

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

.project-card {
    background: var(--color-background);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.project-image {
    position: relative;
    height: 200px;
}

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

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    opacity: 0;
    transition: var(--transition);
}

.project-image:hover .project-overlay {
    opacity: 1;
}

.project-content {
    padding: 1.5rem;
}

.project-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.project-description {
    color: var(--color-text-light);
    margin-bottom: 1rem;
}

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

.tag {
    padding: 0.25rem 0.75rem;
    background: var(--color-primary-light);
    color: white;
    border-radius: 9999px;
    font-size: 0.875rem;
}

/* Skills Section */
.skills {
    padding: 5rem 0;
}

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

.skill-card {
    background: var(--color-background);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
}

.skill-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.skill-icon {
    color: var(--color-primary);
}

.skill-title {
    font-size: 1.25rem;
    font-weight: 600;
}

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

/* Experience Section */
.experience {
    padding: 5rem 0;
    background: var(--color-background-alt);
}

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

.timeline-item {
    background: var(--color-background);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

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

.timeline-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.timeline-company {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-light);
}

.timeline-period {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-light);
}

/* Contact Section */
.contact {
    padding: 5rem 0;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--color-text-light);
    border-radius: 0.5rem;
    background: transparent;
    outline: none;
    transition: var(--transition);
}

.form-group textarea {
    height: 150px;
    resize: none;
}

.form-group label {
    position: absolute;
    left: 1rem;
    top: 1.4rem;
    color: var(--color-text-light);
    transition: var(--transition);
    pointer-events: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
    transform: translateY(-1.5rem);
    font-size: 0.875rem;
    color: var(--color-primary);
}

/* Footer */
.footer {
    padding: 2rem 0;
    text-align: center;
    background: var(--color-background-alt);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 4rem;
        right: -100%;
        width: 80%;
        height: calc(100vh - 4rem);
        background: var(--color-background);
        padding: 2rem;
        transition: var(--transition);
    }

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

    .nav-list {
        flex-direction: column;
        align-items: center;
    }

    .nav-toggle {
        display: block;
        background: none;
        border: none;
        cursor: pointer;
        color: var(--color-text);
    }

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

    .timeline-header {
        flex-direction: column;
        gap: 0.5rem;
    }
}