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

:root {
    --primary-color: #ffffff;
    --secondary-color: #f8f9fa;
    --accent-color: #4e73df;
    --text-color: #333333;
    --light-text: #666666;
    --border-color: #e9ecef;
    --transition-speed: 0.3s;
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    --gradient: linear-gradient(135deg, #4e73df 0%, #36b9cc 100%);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--primary-color);
}

a {
    text-decoration: none;
    color: var(--accent-color);
    transition: all var(--transition-speed) ease;
}

a:hover {
    color: #2e59d9;
}

/* Contenedor principal */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Sección de bienvenida */
.welcome-section {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--gradient);
    color: white;
    position: relative;
}

.welcome-content {
    z-index: 1;
}

.welcome-content h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    animation: fadeInDown 1s ease;
}

.welcome-content h2 {
    font-size: 2rem;
    font-weight: 400;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.3s;
    animation-fill-mode: both;
}

.scroll-indicator {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    animation: fadeIn 1s ease 1s;
    animation-fill-mode: both;
}

.scroll-indicator p {
    margin-bottom: 10px;
    font-size: 0.9rem;
    opacity: 0.8;
}

.bounce {
    animation: bounce 2s infinite;
}

/* Nav bar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
    padding: 15px 0;
    z-index: 1000;
    transform: translateY(-100%);
    transition: transform 0.4s ease;
}

.navbar.visible {
    transform: translateY(0);
}

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

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--accent-color);
    transition: width var(--transition-speed) ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.social-icons {
    display: flex;
    gap: 15px;
}
.social-icons a i {
    font-size: 1.8rem; 
    color: #0a66c2;   
    margin: 0 10px;
    transition: color 0.3s, transform 0.3s;
}

.social-icons a[aria-label="GitHub"] i {
    color: #171515; 
}

.social-icons a[aria-label="Kaggle"] i {
    color: #20beff; 
}

.social-icons a:hover i {
    color: #ff9800;  
    transform: scale(1.2);
}


.social-icons a {
    color: var(--light-text);
    font-size: 1.2rem;
    transition: all var(--transition-speed) ease;
}

.social-icons a:hover {
    color: var(--accent-color);
    transform: translateY(-3px);
}

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

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-color);
}

.section-divider {
    height: 3px;
    width: 60px;
    background: var(--accent-color);
    margin: 0 auto;
}


.about-content {
    display: flex;
    gap: 50px;
    align-items: center;
}

.about-image {
    flex: 1;
}

.about-image img {
    width: 100%;
    max-width: 350px;
    border-radius: 188px;
    box-shadow: var(--shadow);
    transition: transform var(--transition-speed) ease;
}
.about-image img:hover {
    transform: scale(1.02);
}

.about-text {
    flex: 2;
}
.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--light-text);
}

.skills-container {
    margin-top: 30px;
}

.skills-container h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
}

.skill-item {
    background-color: var(--secondary-color);
    padding: 10px 15px;
    border-radius: 5px;
    font-size: 0.9rem;
    text-align: center;
    transition: all var(--transition-speed) ease;
}

.skill-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    background-color: var(--accent-color);
    color: white;
}


.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
    gap: 30px;
}
.portfolio-item {
    background-color: var(--secondary-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition-speed) ease;
}
.portfolio-item:hover {
    transform: translateY(-5px);
}
.portfolio-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}
.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.portfolio-item:hover .portfolio-image img {
    transform: scale(1.05);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(78, 115, 223, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
}

.portfolio-image:hover .portfolio-overlay {
    opacity: 1;
}
.portfolio-overlay i {
    color: white;
    font-size: 2rem;
}

.portfolio-info {
    padding: 20px;
}

.portfolio-info h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.portfolio-info p {
    color: var(--light-text);
    margin-bottom: 15px;
}

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

.portfolio-tags span {
    background-color: rgba(78, 115, 223, 0.1);
    color: var(--accent-color);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}


.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

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

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.contact-item i {
    font-size: 1.2rem;
    color: var(--accent-color);
}

.contact-form {
    background-color: var(--secondary-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color var(--transition-speed) ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.submit-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color var(--transition-speed) ease;
}

.submit-btn:hover {
    background-color: #2e59d9;
}



.footer {
    background-color: var(--secondary-color);
    padding: 30px 0;
    text-align: center;
}
.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.footer p {
    margin-bottom: 15px;
    color: var(--light-text);
}

.footer-social {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.footer-social a {
    color: var(--light-text);
    font-size: 1.5rem;
    transition: all var(--transition-speed) ease;
}

.footer-social a:hover {
    color: var(--accent-color);
    transform: translateY(-3px);
}


@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* Media queries */
@media (max-width: 1024px) {
    .portfolio-grid {
        grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    }
}

@media (max-width: 768px) {
    .about-content {
        flex-direction: column;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .welcome-content h1 {
        font-size: 3rem;
    }
    
    .welcome-content h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 576px) {
    .navbar-container {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-links {
        gap: 15px;
    }
    
    .section {
        padding: 60px 0;
    }
}