:root {
    --bg: #0f1714;
    --text: #e2f0e0;
    --primary: #2ecc71;
    --primary-dark: #27ae60;
    --secondary: #1abc9c;
    --accent: #2ecc71;
    --card-bg: #1a2621;
    --border: #2d3e35;
    --shadow: 0 6px 18px rgba(0, 30, 20, 0.4);
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: 2.8rem; }
h2 { font-size: 2rem; margin: 1.5rem 0 1.2rem; }
h3 { font-size: 1.4rem; margin: 1.2rem 0 0.6rem; color: var(--primary); }
h4 { font-size: 1.2rem; margin: 1rem 0 0.5rem; }

p, li {
    margin-bottom: 0.75rem;
    font-size: 1rem;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}
a:hover { color: var(--secondary); }

img {
    max-width: 100%;
    height: auto;
}

/* Layout */
section {
    padding: 70px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--primary);
    margin: 12px auto;
    border-radius: 2px;
}

/* ✅ SECCIÓN HOME — con fondo aplicado DIRECTAMENTE aquí */
#home {
    /* Imagen profesional abstracta (tech/industrial) con tonos oscuros y toques verdes */
    background-image: linear-gradient(rgba(10, 20, 15, 0.6), rgba(12, 25, 18, 0.6)), 
                    url('../img/background.jpg?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    /*background-position: center;
    background-attachment: fixed;
    padding: 100px 0 80px;
    text-align: center;*/
    position: relative;
    overflow: hidden;
}

/* ✅ SECCIÓN acerca — con fondo aplicado DIRECTAMENTE aquí */
#acerca {
    background-image: linear-gradient(rgba(10, 20, 15, 0.6), rgba(12, 25, 18, 0.6)), 
                    url('../img/background5.jpg?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    position: relative;
    overflow: hidden;
}

/* ✅ SECCIÓN habilidades — con fondo aplicado DIRECTAMENTE aquí */
#habilidades {
    background-image: linear-gradient(rgba(10, 20, 15, 0.6), rgba(12, 25, 18, 0.6)), 
                    url('../img/background1.jpg?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    position: relative;
    overflow: hidden;
}

/* ✅ SECCIÓN experiencia — con fondo aplicado DIRECTAMENTE aquí */
#experiencia {
    background-image: linear-gradient(rgba(10, 20, 15, 0.6), rgba(12, 25, 18, 0.6)), 
                    url('../img/background6.jpg');
    background-size: 100% auto;  /* Ancho 100%, altura automática */
    background-repeat: repeat;
    background-repeat: repeat-y;
    position: relative;
    overflow: hidden;
}

/* ✅ SECCIÓN servicios — con fondo aplicado DIRECTAMENTE aquí */
#servicios {
    background-image: linear-gradient(rgba(10, 20, 15, 0.6), rgba(12, 25, 18, 0.6)), 
                    url('../img/background2.jpg?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    position: relative;
    overflow: hidden;
}

/* ✅ SECCIÓN testimonios — con fondo aplicado DIRECTAMENTE aquí */
#testimonios {
    background-image: linear-gradient(rgba(10, 20, 15, 0.6), rgba(12, 25, 18, 0.6)), 
                    url('../img/background7.jpg');
    background-size: 100% auto;  /* Ancho 100%, altura automática */
    background-repeat: repeat;
    background-repeat: repeat-y;
    position: relative;
    overflow: hidden;
}

/* ✅ SECCIÓN formacion — con fondo aplicado DIRECTAMENTE aquí */
#formacion {
    background-image: linear-gradient(rgba(10, 20, 15, 0.6), rgba(12, 25, 18, 0.6)), 
                    url('../img/background4.jpg?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    position: relative;
    overflow: hidden;
}

/* ✅ SECCIÓN contacto — con fondo aplicado DIRECTAMENTE aquí */
#contacto {
    background-image: linear-gradient(rgba(10, 20, 15, 0.6), rgba(12, 25, 18, 0.6)), 
                    url('../img/background3.jpg?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    position: relative;
    overflow: hidden;
}

/* Header / Hero */
header {
    /*background: linear-gradient(135deg, #0a110d 0%, #121e17 100%);*/
    padding: 90px 0 70px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.profile-pic {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 24px;
    border: 4px solid rgba(46, 204, 113, 0.3);
    box-shadow: var(--shadow);
    background-color: #2d3e35;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.profile-pic img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.tagline {
    font-size: 1.3rem;
    color: #a8d8b9;
    margin: 14px 0;
    font-weight: 500;
}

.contact-info {
    margin-top: 16px;
    font-size: 1rem;
    color: #c0e0c8;
}

.btn {
    display: inline-block;
    background: var(--primary);
    color: var(--bg);
    padding: 12px 28px;
    border-radius: 30px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-size: 0.9rem;
    margin: 10px 6px;
    transition: var(--transition);
    box-shadow: var(--shadow);
    border: none;
    cursor: pointer;
}

.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 22px rgba(46, 204, 113, 0.4);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: var(--bg);
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 23, 20, 0.97);
    backdrop-filter: blur(8px);
    z-index: 2000;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.7rem;
    font-weight: 800;
    color: var(--primary);
    width: 10%;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 18px;
}

.nav-links a {
    color: var(--text);
    font-weight: 600;
    position: relative;
    padding: 6px 0;
    font-size: 0.95rem;
}

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

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

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    width: 30px;
    height: 24px;
    justify-content: space-between;
    z-index: 2001;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* Cards & Grids */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
    opacity: .8;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 30, 20, 0.45);
    border-color: var(--primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.skill-category h4 {
    color: var(--primary);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.skill-list {
    list-style: none;
}

.skill-list li {
    padding: 5px 0 5px 26px;
    position: relative;
    font-size: 0.95rem;
}

.skill-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

/* ✅ EXPERIENCIA: Timeline corregida — 100% alineada */
#experiencia .container {
    position: relative;
}

.timeline-container {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: 30px 0;
}

.timeline-line {
    position: absolute;
    top: 0;
    left: 50%;
    width: 4px;
    background: var(--primary);
    transform: translateX(-50%);
    z-index: 1;
    pointer-events: none;
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: 30px;
    position: relative;
    margin-bottom: 50px;
    width: 100%;
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: 30px;
    transform: translateX(-50px);
}

.timeline-item:nth-child(even).visible {
    transform: translateX(0);
}

.timeline-dot {
    position: absolute;
    top: 30px;
    left: 50%;
    width: 20px;
    height: 20px;
    background: var(--primary);
    border: 4px solid var(--bg);
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 3;
    box-shadow: 0 0 0 2px var(--primary);
}

.timeline-card {
    width: calc(50% - 50px);
    background: var(--card-bg);
    border-radius: 12px;
    padding: 26px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    z-index: 2;
}

.timeline-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 30, 20, 0.5);
    border-color: var(--primary);
}

.timeline-date {
    display: inline-block;
    background: rgba(46, 204, 113, 0.15);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.timeline-item:nth-child(even) .timeline-card {
    /*margin-left: auto;*/
}

/* Language dropdown */
.lang-dropdown {
    position: relative;
    display: inline-block;
}

.lang-toggle {
    background: rgba(46, 204, 113, 0.15);
    color: var(--primary);
    border: none;
    padding: 6px 14px;
    border-radius: 20px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
}

.lang-toggle i {
    font-size: 0.8em;
    transition: transform 0.3s;
}

.lang-toggle.active i {
    transform: rotate(180deg);
}

.lang-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow);
    list-style: none;
    padding: 8px 0;
    margin: 6px 0 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
    z-index: 10;
    min-width: 90px;
}

.lang-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-menu li {
    padding: 8px 16px;
    cursor: pointer;
    font-size: 0.9rem;
}

.lang-menu li:hover {
    background: rgba(46, 204, 113, 0.1);
}

.lang-menu li.active {
    color: var(--primary);
    font-weight: 600;
}

/* Responsive timeline */
@media (max-width: 900px) {
    .timeline-line {
        left: 24px;
        width: 3px;
    }

    .timeline-item {
        flex-direction: row;
        justify-content: flex-start;
        padding-left: 60px;
        padding-right: 0;
    }

    .timeline-item:nth-child(even) {
        padding-left: 60px;
    }

    .timeline-dot {
        left: 24px;
    }

    .timeline-card {
        width: calc(100% - 80px);
        margin-left: 0 !important;
    }
}

@media (max-width: 768px) {
    .menu-toggle { display: flex; }
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--bg);
        flex-direction: column;
        align-items: center;
        padding: 2px 0;
        gap: 1px;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
        transform: translateY(-150%);
        transition: transform 0.4s ease;
        z-index: 1999;
    }

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

    .nav-links a {
        font-size: 1.2rem;
        /*padding: 10px 20px;
        display: block;*/
        text-align: center;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }

    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.7rem; }
    .profile-pic { width: 120px; height: 120px; }
    section { padding: 50px 0; }
    .btn { padding: 10px 24px; font-size: 0.85rem; }
    #home { padding: 80px 0 60px; background-attachment: scroll; }

    /* Mobile timeline */
    .timeline-line {
        left: 30px !important;
    }

    .timeline-item {
        padding-left: 70px !important;
        flex-direction: column;
        align-items: flex-start;
    }

    .timeline-dot {
        position: absolute;
        left: 30px !important;
        top: 20px;
        margin-bottom: 20px;
    }

    .timeline-card {
        width: 100% !important;
        padding: 22px;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 1.9rem; }
    .tagline { font-size: 1.15rem; }
    .skills-grid,
    .testimonials-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }
    .contact-info { font-size: 0.95rem; }
}

/* Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.service-card {
    text-align: center;
    padding: 28px 20px;
}

.service-icon {
    font-size: 2.8rem;
    color: var(--primary);
    margin-bottom: 18px;
}

/* Testimonials */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.testimonial {
    background: var(--card-bg);
    padding: 26px;
    border-radius: 12px;
    position: relative;
    border-left: 4px solid var(--primary);
}

.testimonial::before {
    content: '"';
    position: absolute;
    top: 16px;
    left: 16px;
    font-size: 4.5rem;
    color: rgba(46, 204, 113, 0.4);
    font-family: serif;
    line-height: 1;
}

.testimonial-text {
    margin: 14px 0 18px;
    font-style: italic;
    font-size: 0.95rem;
    margin-left: 1rem;
}

.testimonial-author {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.05rem;
}

.testimonial-role {
    font-size: 0.9rem;
    color: #a8d8b9;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.contact-form .form-group {
    margin-bottom: 16px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 1rem;
}

.contact-form textarea {
    min-height: 140px;
    resize: vertical;
}

.contact-info-box {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 16px;
}

.contact-icon {
    font-size: 1.3rem;
    color: var(--primary);
    min-width: 26px;
}

/* Footer */
footer {
    background: #0a110d;
    padding: 36px 0 20px;
    text-align: center;
    border-top: 1px solid var(--border);
    margin-top: 40px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 18px;
    margin: 18px 0;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--card-bg);
    color: var(--text);
    font-size: 1.1rem;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    color: var(--bg);
    transform: translateY(-3px);
}

/* Scroll to top */
.scroll-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: var(--bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
}

.scroll-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

.fa-user-tie, .fa-briefcase, .fa-laptop-code, .fa-award, .fa-server, 
.fa-address-card, .fa-comment-dots {
    color: var(--primary);
}