:root {
    --bg-color: #f9fafb; /* Very light gray */
    --surface-color: #ffffff; /* Pure white */
    --text-primary: #111827; /* Near black */
    --text-secondary: #4b5563; /* Medium gray */
    --border-color: #e5e7eb; /* Light gray border */
    --accent-color: #111827; /* Dark accent */
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background: rgba(249, 250, 251, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    text-decoration: none;
    color: var(--text-primary);
    letter-spacing: -1px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.lang-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.8rem;
    transition: all 0.2s ease;
    font-family: 'Inter', sans-serif;
}

.lang-btn:hover {
    background: var(--text-primary);
    color: var(--surface-color);
}

/* Main Layout */
main {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Hero Section */
.hero {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding-top: 8rem;
    padding-bottom: 2rem;
}

.hero-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    gap: 3rem;
}

.hero-text {
    flex: 1;
}

.hero-image {
    flex-shrink: 0;
    width: 250px;
    height: 250px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--border-color);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

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

.title {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1rem;
    letter-spacing: -1.5px;
    color: var(--text-primary);
}

.highlight {
    color: var(--text-primary);
}

.subtitle {
    font-size: clamp(1.1rem, 4vw, 1.4rem);
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-weight: 400;
}

.cta-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 4rem;
}

.btn {
    padding: 0.9rem 1.8rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--text-primary);
    color: var(--surface-color);
    border: 1px solid var(--text-primary);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--text-primary);
    background-color: var(--surface-color);
}

/* Skills Section inside Hero */
.skills-section {
    width: 100%;
    margin-bottom: 2rem;
}

.skills-title {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 8px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.skill-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

.skill-card h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.05rem;
    font-weight: 600;
}

.skill-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Sections */
.section {
    padding: 3.5rem 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
}

.section-text {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 750px;
    line-height: 1.7;
}

/* Timeline / Experience */
.timeline {
    position: relative;
    padding-left: 2rem;
    border-left: 1px solid var(--border-color);
    margin-top: 1rem;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -2.35rem;
    top: 0.35rem;
    width: 12px;
    height: 12px;
    background-color: var(--text-primary);
    border-radius: 50%;
    border: 3px solid var(--bg-color);
}

.timeline-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}

.timeline-date {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-family: monospace;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

/* Contact */
.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.social-btn {
    padding: 0.7rem 1.5rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.social-btn:hover {
    background: var(--text-primary);
    color: var(--surface-color);
}

/* Footer */
footer {
    text-align: center;
    padding: 3rem 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links a {
        display: none;
    }
    .hero {
        align-items: center;
        text-align: center;
    }
    .hero-top {
        flex-direction: column-reverse;
        gap: 2rem;
    }
    .hero-image {
        width: 200px;
        height: 200px;
    }
    .skills-section {
        text-align: center;
    }
    .skills-title {
        text-align: center;
    }
    .section {
        align-items: center;
        text-align: center;
    }
    .section-title::after {
        left: 50%;
        transform: translateX(-50%);
    }
    .cta-group {
        justify-content: center;
    }
    .timeline {
        padding-left: 0;
        border-left: none;
        text-align: left;
    }
    .timeline-dot {
        display: none;
    }
    .social-links {
        justify-content: center;
    }
}