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

:root {
    --primary-color: #e67e22;      /* Naranja fuerte */
    --primary-dark: #d35400;       /* Naranja más oscuro */
    --secondary-color: #f39c12;    /* Naranja claro */
    --dark-bg: #1a1a1a;            /* Negro para fondo oscuro */
    --dark-gray: #2c2c2c;          /* Gris oscuro */
    --text-light: #ecf0f1;         /* Texto claro */
    --text-gray: #bdc3c7;          /* Texto gris */
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-light);
    background-color: var(--dark-bg);
}

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

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    transition: var(--transition);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo a {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--primary-color);
    letter-spacing: 2px;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: var(--transition);
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-light);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section - CON IMAGEN DE FONDO */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    /* IMAGEN DE FONDO */
    background-image: url('../images/sturmpanzer_bg.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    color: var(--text-light);
    padding: 0 20px;
}

/* Capa oscura semitransparente sobre la imagen para que el texto sea legible */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.9;
    color: var(--primary-color);
}

.description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.8;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    margin: 0 10px;
    text-decoration: none;
    border-radius: 50px;
    transition: var(--transition);
    font-weight: 500;
}

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

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

.btn.secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

/* Projects Section - FONDO NEGRO */
.projects {
    padding: 100px 0;
    background: var(--dark-bg);  /* Negro */
}

.projects h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-light);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    padding: 0 20px;
    min-height: 400px;
}

.project-card {
    background: var(--dark-gray);  /* Gris oscuro para las tarjetas */
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
    cursor: pointer;
    opacity: 1;
    transform: none;
    will-change: transform;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
}

.project-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    background: #1a1a1a;
    image-rendering: crisp-edges;
    display: block;
}

.project-info {
    padding: 1.5rem;
}

.project-title {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.project-description {
    color: var(--text-gray);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tag {
    background: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

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

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

/* About Section - GRIS OSCURO */
.about {
    padding: 100px 0;
    background: var(--dark-gray);  /* Gris oscuro */
}

.about h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-light);
}

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

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

.skills {
    margin: 2rem 0;
}

.skills h3, .experience h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tag {
    background: var(--primary-color);
    color: white;
    padding: 8px 16px;
    border-radius: 25px;
    font-size: 0.9rem;
}

.experience-item {
    margin-bottom: 1.5rem;
}

.experience-item h4 {
    font-size: 1.2rem;
    margin-bottom: 0.3rem;
    color: var(--text-light);
}

.company {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

/* Contact Section - FONDO NEGRO */
.contact {
    padding: 100px 0;
    background: var(--dark-bg);
    text-align: center;
}

.contact h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-light);
}

.contact-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--text-gray);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: var(--dark-gray);
    text-decoration: none;
    color: var(--text-light);
    border-radius: 50px;
    transition: var(--transition);
}

.contact-item:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.icon {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

/* Footer */
footer {
    background: #111;
    color: var(--text-gray);
    text-align: center;
    padding: 2rem 0;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.project-card {
    animation: fadeIn 0.5s ease forwards;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(0, 0, 0, 0.95);
        flex-direction: column;
        text-align: center;
        padding: 2rem 0;
        gap: 1rem;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1.2rem;
    }
    
    .description {
        font-size: 1rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-links {
        flex-direction: column;
        align-items: center;
    }
    
    .contact-item {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}