:root {
    /* Paleta de colores - Tema Oscuro 'Tech' */
    --bg-main: #0f172a;        /* Slate 900 */
    --bg-secondary: #1e293b;   /* Slate 800 */
    --text-primary: #f8fafc;   /* Slate 50 */
    --text-secondary: #94a3b8; /* Slate 400 */
    --accent: #38bdf8;         /* Sky 400 (Azul técnico) */
    --accent-hover: #0284c7;   /* Sky 600 */
    --border-color: #334155;   /* Slate 700 */
}

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

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

/* Lógica de Cambio de Idioma */
body.es .lang-en { display: none !important; }
body.en .lang-es { display: none !important; }

h1, h2, h3, h4, h5 {
    font-family: 'Fira Code', monospace;
    font-weight: 500;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-hover);
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Lang Toggle Button */
.lang-toggle-container {
    position: absolute;
    top: 25px;
    right: 25px;
}

.lang-btn {
    background-color: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.lang-btn:hover {
    background-color: var(--accent);
    color: var(--bg-main);
}

/* Hero Section */
.hero {
    background-color: var(--bg-secondary);
    padding: 80px 0 60px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 40px;
    position: relative;
}

.hero h1 {
    font-size: 3.5rem;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.hero .subtitle {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 30px;
}

.contact-info {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 0.9rem;
}

.contact-info a, .contact-info span {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.contact-info a:hover {
    color: var(--accent);
}

/* Sections Generales */
section {
    margin-bottom: 60px;
}

.section-title {
    font-size: 1.8rem;
    margin-bottom: 25px;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
    display: inline-block;
}

.section-title i {
    color: var(--accent);
    margin-right: 10px;
}

p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 15px;
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
}

.skill-category h4 {
    margin-bottom: 15px;
    color: var(--text-primary);
    font-size: 1.1rem;
}

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

.tags span {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-family: 'Fira Code', monospace;
    color: var(--accent);
}

/* Timeline / Experiencia */
.timeline {
    position: relative;
    padding-left: 30px;
    border-left: 2px solid var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-dot {
    position: absolute;
    left: -37px;
    top: 5px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--accent);
    border: 2px solid var(--bg-main);
}

.timeline-content h4 {
    font-size: 1.25rem;
    color: var(--text-primary);
}

.timeline-content h5 {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-family: 'Inter', sans-serif;
}

.timeline-content h5 span {
    color: var(--accent);
}

.timeline-content ul {
    list-style-position: inside;
    list-style-type: square;
    color: var(--text-secondary);
}

.timeline-content ul li {
    margin-bottom: 10px;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Footer */
footer {
    text-align: center;
    padding: 30px 0;
    margin-top: 40px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
}

/* Animaciones simples */
.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) {
    .hero {
        padding-top: 100px;
    }
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .contact-info {
        flex-direction: column;
        gap: 10px;
    }

    .lang-toggle-container {
        top: 20px;
        right: 20px;
    }
}

/* Certificaciones */
.cert-list {
    list-style: none;
    color: var(--text-secondary);
}

.cert-list li {
    margin-bottom: 12px;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.cert-list li a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.cert-list i {
    color: var(--accent);
    width: 20px;
    text-align: center;
}

.cert-list .in-progress {
    color: var(--text-secondary);
    font-style: italic;
    opacity: 0.8;
}