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

:root {
    --primary: #0066cc;
    --primary-dark: #0052a3;
    --secondary: #6c757d;
    --dark: #1a1a2e;
    --gray: #495057;
    --light-gray: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #1a1a2e;
    --text-secondary: #495057;
    --border-color: #eee;
}

[data-theme="dark"] {
    --primary: #4d9fff;
    --primary-dark: #3385e6;
    --secondary: #adb5bd;
    --dark: #e9ecef;
    --gray: #adb5bd;
    --light-gray: #2d2d44;
    --white: #1a1a2e;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.4);
    --bg-primary: #1a1a2e;
    --bg-secondary: #2d2d44;
    --text-primary: #e9ecef;
    --text-secondary: #adb5bd;
    --border-color: #3d3d5c;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: background-color 0.3s ease;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
}

.nav-logo-img {
    height: 40px;
    width: auto;
}

.logo-dark {
    display: none;
}

[data-theme="dark"] .logo-light {
    display: none;
}

[data-theme="dark"] .logo-dark {
    display: block;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    color: var(--text-primary);
}

.theme-toggle:hover {
    background: var(--bg-secondary);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none !important;
}

[data-theme="light"] .sun-icon,
:not([data-theme]) .sun-icon {
    display: none;
}

[data-theme="light"] .moon-icon,
:not([data-theme]) .moon-icon {
    display: block !important;
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--secondary);
    margin-bottom: 10px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 12px 28px;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

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

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

.hero-image {
    flex-shrink: 0;
}

.avatar {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    border: 5px solid var(--primary);
    box-shadow: var(--shadow);
    object-fit: cover;
}

/* Sections */
.section {
    padding: 100px 0;
}

.section-gray {
    background: var(--light-gray);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary);
    margin: 15px auto 0;
    border-radius: 2px;
}

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

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.about-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
    padding: 25px;
    background: var(--bg-secondary);
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.info-item {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

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

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.skill-category {
    background: var(--bg-secondary);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.skill-category-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    padding: 8px 16px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.skill-tag:hover {
    background: var(--primary);
    color: var(--white);
}

/* Projects */
.projects-filters {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    border: 2px solid var(--primary);
    background: transparent;
    color: var(--primary);
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    color: var(--white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 25px;
}

.project-card {
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 25px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.project-icon {
    width: 40px;
    height: 40px;
    fill: var(--primary);
}

.project-stars {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.project-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    text-decoration: none;
}

.project-title:hover {
    color: var(--primary);
}

.project-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
    min-height: 60px;
}

.project-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.project-language {
    display: flex;
    align-items: center;
    gap: 8px;
}

.language-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.language-dot.Java { background: #b07219; }
.language-dot.Portugol { background: #ff4500; }
.language-dot.Python { background: #3572A5; }
.language-dot.JavaScript { background: #f1e05a; }
.language-dot.HTML { background: #e34c26; }
.language-dot.CSS { background: #563d7c; }
.language-dot.Shell { background: #89e051; }
.language-dot.Dockerfile { background: #384d54; }

.project-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

/* GitHub Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    justify-items: center;
}

.stat-card {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 500px;
}

.stats-image {
    width: 100%;
    height: auto;
}

/* Contact */
.contact-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.contact-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.contact-links-center {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px 25px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
}

.contact-link:hover {
    background: var(--primary);
    color: var(--white);
}

.contact-link svg {
    width: 20px;
    height: 20px;
}

/* Scroll Animations */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Footer */
.footer {
    background: var(--dark);
    color: var(--white);
    text-align: center;
    padding: 30px 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

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

.footer-tech {
    color: var(--secondary);
    font-size: 0.85rem;
}

.footer-ai {
    color: var(--secondary);
    font-size: 0.85rem;
    font-style: italic;
}

.footer-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 10px;
}

.badge {
    padding: 4px 10px;
    background: var(--primary);
    color: var(--white);
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 500;
}

/* Loading */
.loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column-reverse;
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .avatar {
        width: 220px;
        height: 220px;
    }

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

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        box-shadow: var(--shadow);
        transform: translateY(-150%);
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

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

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

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

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

    .contact-links-center {
        flex-direction: column;
        align-items: center;
    }
}