/* =========================================
    Variables de Tema & Diseño (Design Tokens)
   ========================================= */
:root {
    --bg-main: #0f172a;
    --bg-alt: #1e293b;
    --card-bg: rgba(51, 65, 85, 0.6);
    --card-bg-hover: rgba(51, 65, 85, 0.9);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #38bdf8;
    --primary-hover: #0284c7;
    --border-color: #475569;
    --glow-color: rgba(56, 189, 248, 0.15);
    
    /* Animaciones */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =========================================
    Reseteo Básico & Tipografía
   ========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    /*font-family: 'Inter', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;*/
    /* Inter para textos generales (párrafos, listas, menús) */
    font-family: 'Inter', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}
/* Poppins para elementos destacados */
h1, h2, h3, .logo, .btn {
    font-family: 'Poppins', sans-serif;
}
html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* Compensa la altura del navbar fijo */
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* =========================================
    Navegación & Header
   ========================================= */
.navbar {
    background-color: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(71, 85, 105, 0.5);
    transition: var(--transition-normal);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 75px;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: -0.5px;
    transition: var(--transition-fast);
}

.logo:hover {
    color: var(--primary-hover);
    transform: scale(1.02);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 28px;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--primary);
    transition: width var(--transition-normal);
}

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

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

/* Selector de Idioma */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(30, 41, 59, 0.8);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.lang-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.lang-btn:hover {
    color: var(--primary);
}

.lang-btn.active {
    color: var(--primary);
}

.lang-divider {
    color: var(--border-color);
    font-size: 0.8rem;
    user-select: none;
}

/* Menú Móvil */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.menu-toggle .bar {
    height: 2px;
    width: 100%;
    background-color: var(--text-main);
    border-radius: 10px;
    transition: var(--transition-normal);
}

/* =========================================
    Animación de Cambio de Idioma (Fade)
   ========================================= */
[data-i18n] {
    transition: opacity 0.3s ease-in-out;
    will-change: opacity;
}
.fade-text {
    opacity: 0;
}
/* =========================================
    Layout Principal & Secciones
   ========================================= */
.section {
    padding: 100px 0;
    position: relative;
}

.bg-alt {
    background-color: var(--bg-alt);
    border-top: 1px solid rgba(71, 85, 105, 0.2);
    border-bottom: 1px solid rgba(71, 85, 105, 0.2);
}

.section-title {
    text-align: center;
    font-size: 2.4rem;
    margin-bottom: 50px;
    color: var(--text-main);
    font-weight: 700;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--primary);
    margin: 15px auto 0;
    border-radius: 2px;
}

/* =========================================
    Hero Section
   ========================================= */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
    padding-top: 75px;
    background: radial-gradient(circle at top center, var(--bg-alt) 0%, var(--bg-main) 100%);
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 15px;
    background: linear-gradient(to right, #fff, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text; /* Mantiene la compatibilidad y elimina la advertencia */
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    color: var(--text-muted);
    margin-bottom: 30px;
    font-weight: 400;
}
.hero-name {
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    color: var(--text-muted);
    font-weight: 400;
}
.hero-text {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

/* =========================================
    Botones & Componentes
   ========================================= */
.hero-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition-fast);
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--bg-main);
    box-shadow: 0 4px 14px var(--glow-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(2, 132, 199, 0.4);
}

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

.btn-outline:hover {
    background-color: rgba(56, 189, 248, 0.1);
    transform: translateY(-2px);
}

/* =========================================
    Tarjetas (Cards) & Grids
   ========================================= */
.grid {
    display: grid;
    gap: 24px;
}

.cards-grid, .cert-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

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

.card {
    background-color: var(--card-bg);
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    transition: var(--transition-normal);
}

.hover-effect:hover {
    transform: translateY(-8px);
    background-color: var(--card-bg-hover);
    border-color: var(--primary);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3), 0 0 15px var(--glow-color);
}

.card h3 {
    color: var(--primary);
    margin-bottom: 20px;
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card ul {
    list-style: none;
}

.card ul li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 12px;
    color: var(--text-muted);
}

.card ul li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.project-card .date {
    font-size: 0.9rem;
    color: var(--primary);
    margin-bottom: 15px;
    font-weight: 500;
}

/* =========================================
    Línea de Tiempo (Experiencia)
   ========================================= */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    padding-bottom: 40px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 32px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 10px var(--glow-color);
}

.company {
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

/* =========================================
    Footer
   ========================================= */
.footer {
    text-align: center;
    padding: 40px 0;
    background-color: var(--bg-main);
    border-top: 1px solid var(--border-color);
}

.footer p {
    margin-bottom: 10px;
    color: var(--text-muted);
}

.footer-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: var(--text-main);
    text-decoration: underline;
}

/* =========================================
    Animaciones Nativas (Intersection Observer)
   ========================================= */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
    will-change: opacity, transform;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Retrasos escalonados para elementos hijos (Grids) */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* Accesibilidad: Respetar preferencias del sistema */
@media (prefers-reduced-motion: reduce) {
    *, ::before, ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .animate-on-scroll {
        opacity: 1;
        transform: none;
    }
}

/* =========================================
    Media Queries (Responsive)
   ========================================= */
@media (max-width: 850px) {
    .nav-links {
        position: fixed;
        top: 75px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 75px);
        background-color: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: left var(--transition-normal);
    }

    .nav-links.active {
        left: 0;
    }

    .nav-links a {
        font-size: 1.5rem;
    }

    .menu-toggle {
        display: flex;
    }

    /* Animación del botón hamburguesa */
    .menu-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .menu-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    .menu-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .lang-switch {
        margin-right: 15px; /* Separación del botón de menú */
    }

    .timeline::before {
        left: 0;
    }
    
    .timeline-item {
        padding-left: 30px;
    }
    
    .timeline-item::before {
        left: -6px;
    }
}