/* Variables de Color (Paleta Blanco y Verde) */
:root {
     --bg-primary: #f8f8f8; /* Fondo principal muy claro */
     --bg-secondary: #ffffff; /* Blanco puro para cajas */
     --text-color: #333333; /* Texto gris oscuro */
     --text-secondary: #666666; /* Texto gris medio para descripciones */
     --accent-color: #007d4c; /* Verde Oscuro (Principal de acento) */
     --accent-glow: #32cd32; /* Verde Lima (Brillo/Hover) */
     --card-border: #e0e0e0; /* Borde suave para las tarjetas */
     --shadow-light: rgba(0, 0, 0, 0.08); /* Sombra muy suave */
     --shadow-accent: rgba(0, 125, 76, 0.15); /* Sombra con toque verde */
     --transition-speed: 0.6s;
     --border-radius: 12px;
}

/* Base */
body {
     font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
     background-color: var(--bg-primary);
     color: var(--text-color);
     margin: 0;
     padding: 0;
     line-height: 1.6;
     scroll-behavior: smooth;
     overflow-x: hidden;
}

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

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

h1, h2, h3 {
     color: var(--text-color);
     font-weight: 600;
}

/* --- NAVBAR Y MENÚ DE HAMBURGUESA (Ajustado) --- */
.navbar {
     position: sticky;
     top: 0;
     z-index: 1000;
     background-color: rgba(255, 255, 255, 0.95);
     backdrop-filter: blur(5px);
     -webkit-backdrop-filter: blur(5px);
     box-shadow: 0 2px 10px var(--shadow-light);
     display: flex;
     justify-content: space-between;
     align-items: center;
     padding: 1rem 5%;
     width: 100%;
     box-sizing: border-box;
}

.logo {
     color: var(--accent-color);
     font-weight: bold;
     font-size: 1.3rem;
}

/* Ocultar el checkbox y el menú toggle en desktop */
.menu-checkbox {
    display: none;
}

.menu-toggle {
    display: none; /* Se muestra solo en media query */
    cursor: pointer;
    font-size: 2rem;
    line-height: 1;
    color: var(--accent-color);
}

.nav-links {
     list-style: none;
     display: flex;
     margin: 0;
     padding: 0;
}

.nav-links li {
     margin-left: 1.5rem;
}
.nav-link {
     color: var(--text-color);
     font-weight: 500;
}
.nav-link:hover {
     color: var(--accent-color);
}
/* --- FIN NAVBAR --- */


/* Main Content Wrapper (Centra el contenido) */
.main-content {
     margin: 30px auto;
     padding: 0 20px;
     box-sizing: border-box;
}

/* Estilo General de las "Cajas" */
.profile-section, .content-grid-item, .projects-section, .education-section, .contact-section {
     background-color: var(--bg-secondary);
     border: 1px solid var(--card-border);
     border-radius: var(--border-radius);
     padding: 30px;
     margin-bottom: 30px;
     box-shadow: 0 4px 15px var(--shadow-light);
     box-sizing: border-box;
}

/* Secciones que no son cajas directas */
.quote {
     padding: 20px 0;
     margin-bottom: 30px;
}

/* Títulos de Sección */
h2 {
     text-align: center;
     font-size: 1.8rem;
     margin-bottom: 25px;
     border-bottom: 2px solid var(--accent-glow);
     display: inline-block;
     padding-bottom: 5px;
     width: auto;
     white-space: nowrap;
     left: 50%;
     transform: translateX(-50%);
     position: relative;
     color: var(--accent-color);
}

/* Perfil */
.profile-section {
     text-align: center;
     padding: 40px;
}

.profile-header {
     display: flex;
     flex-direction: column;
     align-items: center;
     margin-bottom: 20px;
}

.profile-pic { /* Imagen de perfil */
     width: 200px;
     height: 200px;
     border-radius: 50%;
     object-fit: cover;
     border: 3px solid var(--accent-color);
     box-shadow: 0 0 10px var(--accent-glow);
     margin-bottom: 15px;
}

.role {
     color: var(--accent-color);
     font-style: italic;
     font-size: 1.1rem;
}

.bio {
     color: var(--text-secondary);
     max-width: 800px;
     margin-left: auto;
     margin-right: auto;
     margin-bottom: 30px;
}

/* Botones */
.btn {
     padding: 10px 20px;
     border-radius: 5px;
     font-weight: bold;
     border: 2px solid var(--accent-color);
     -webkit-transition: all var(--transition-speed) ease;
     -moz-transition: all var(--transition-speed) ease;
     transition: all var(--transition-speed) ease;
}

.primary-btn {
     background-color: var(--accent-color);
     color: var(--bg-secondary);
}

.primary-btn:hover {
     background-color: var(--accent-color);
     border-color: var(--accent-color);
     box-shadow: 0 0 15px var(--accent-color);
     color: black;
}

.secondary-btn {
     background-color: transparent;
     color: var(--accent-color);
     margin: auto;
}
.secondary-btn:hover {
     background-color: var(--accent-glow);
     color: var(--bg-secondary);
     box-shadow: 0 0 10px var(--accent-glow);
}

/* Stack Tecnológico */
.stack-category {
     background-color: var(--bg-primary);
     border: 1px solid var(--card-border);
     border-radius: var(--border-radius);
     padding: 20px;
     margin-bottom: 20px;
     transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.stack-category:hover {
     transform: translateY(-5px);
     box-shadow: 0 8px 25px var(--shadow-accent);
     border-color: var(--accent-glow);
}

.stack-category h3 {
     border-bottom: 1px dashed rgb(77, 76, 76);
     padding-bottom: 10px;
     margin-top: 0;
     margin-bottom: 15px;
     color: var(--accent-color);
}

.skill-icons {
     display: flex;
     flex-wrap: wrap;
     gap: 15px;
     justify-content: center;
}

.skill-item {
     background-color: var(--bg-secondary);
     padding: 8px 15px;
     border-radius: 5px;
     font-size: 0.9rem;
     color: var(--text-color);
     border: 1px solid var(--card-border);
}

.skill-item i {
     margin-right: 5px;
     color: var(--accent-glow);
}

/* Frase Motivacional */
.quote {
     text-align: center;
     font-size: 1.5rem;
     font-style: italic;
     color: var(--text-color);
     padding: 30px 5%;
     margin-bottom: 30px;
     border-bottom: 1px solid var(--card-border);
     border-top: 1px solid var(--card-border);
}
.quote strong {
     color: var(--accent-color);
}

/* Proyectos (Grid de tarjetas) */
.projects-section {
     padding: 30px;
}

.projects-grid {
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
     gap: 20px;
     padding-top: 20px;
}

.project-card {
     background-color: var(--bg-primary);
     border: 1px solid var(--card-border);
     border-radius: var(--border-radius);
     padding: 25px;
     text-align: center;
     transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.project-card:hover {
     transform: translateY(-5px);
     box-shadow: 0 6px 20px var(--shadow-accent);
     border-color: var(--accent-glow);
}

.project-card h3 {
     color: var(--accent-color);
     margin-top: 0;
}
.project-card p {
     color: var(--text-secondary);
     font-size: 0.9rem;
     margin-bottom: 30px;
}


/* Educación (Timeline) */
.timeline-item {
     padding: 20px 0;
     border-left: 2px solid var(--accent-color);
     padding-left: 20px;
     position: relative;
     margin-bottom: 20px;
}

.timeline-item::before {
     content: '•';
     position: absolute;
     left: -12px;
     top: 25px;
     font-size: 20px;
     color: var(--accent-glow);
     text-shadow: 0 0 5px var(--accent-glow);
}

.institute {
     color: var(--text-secondary);
     font-style: italic;
     font-size: 0.95rem;
}
.timeline-item h3 {
     color: var(--accent-color);
}

/* Contacto (Estilo en Desktop) */
.contact-section h2{
text-align: center;
}

.contact-info {
     display: flex;
     max-width: 1000px;
     margin: 10px auto 0 auto;
     gap: 50px;
     justify-content: center;
     text-align: center;
}

.contact-link {
     color: var(--text-color);
     text-decoration: none;
     transition: color 0.3s ease;
}

.contact-link:hover {
     color: var(--accent-glow);
}

.contact-info p {
     margin-bottom: 10px;
     font-size: 20px;
}
.contact-info i {
     margin-right: 10px;
     color: var(--accent-color);
     transition: color 0.3s ease;
}

.contact-link:hover i {
     color: var(--accent-glow);
}


/* Footer (Fondo oscuro con texto claro) */
.footer {
     text-align: center;
     padding: 20px 5%;
     background-color: var(--accent-color);
     color: var(--bg-secondary);
     font-size: 0.85rem;
     width: 100%;
     box-sizing: border-box;
     margin-top: 30px;
}
.footer a {
     color: var(--bg-secondary);
}
.footer a:hover {
     color: var(--accent-glow);
}


/* ================================== */
/* TRANSICIONES "CARGA BACANA" - CSS */
/* ================================== */

.animation-item {
     opacity: 0;
     -webkit-transform: translateY(30px);
     -moz-transform: translateY(30px);
     transform: translateY(30px);
     -webkit-transition: opacity var(--transition-speed) ease-out, -webkit-transform var(--transition-speed) ease-out;
     -moz-transition: opacity var(--transition-speed) ease-out, -moz-transform var(--transition-speed) ease-out;
     transition: opacity var(--transition-speed) ease-out, transform var(--transition-speed) ease-out;
}

.animation-item.is-visible {
     opacity: 1;
     -webkit-transform: translateY(0);
     -moz-transform: translateY(0);
     transform: translateY(0);
}

/* ================================== */
/* MEDIA QUERIES PARA RESPONSIVIDAD */
/* ================================== */

@media (max-width: 768px) {
    
    /* 1. Menú de Hamburguesa: Mostrar/Ocultar y Estilos */
    .menu-toggle {
        display: block; /* Muestra el ícono de hamburguesa */
    }

    .nav-menu {
        position: absolute;
        top: 100%; /* Coloca el menú justo debajo de la navbar */
        left: 0;
        width: 100%;
        height: 0; /* Oculto por defecto */
        overflow: hidden;
        background-color: var(--bg-secondary);
        box-shadow: 0 4px 8px var(--shadow-light);
        transition: height 0.3s ease;
        z-index: 999;
    }

    /* Activa el menú cuando el checkbox está marcado */
    .menu-checkbox:checked ~ .nav-menu {
        height: 250px; /* Expande el menú */
    }

    .nav-links {
        flex-direction: column; /* Apilar enlaces */
        align-items: center;
        padding: 10px 0;
        width: 100%;
    }

    .nav-links li {
        margin: 10px 0;
    }
    
    /* 2. Contacto: Forzar columna */
    .contact-info {
        flex-direction: column; /* Cambia a columna en móvil */
        gap: 20px; /* Ajusta la separación */
        margin-top: 20px;
        max-width: 350px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .contact-info p {
        font-size: 1.1rem;
    }
    
    /* 3. Responsividad General */
    .navbar { padding: 0.8rem 3%; }
     .main-content { padding: 0 15px; } 
     .profile-section, .content-grid-item, .projects-section, .education-section, .contact-section {
         padding: 25px;
     }
     h2 { font-size: 1.6rem; }
     .quote { font-size: 1.3rem; }
     .projects-grid {
         grid-template-columns: 1fr; /* Una columna para proyectos */
     }
    .profile-pic { width: 150px; height: 150px; }
}

@media (max-width: 480px) {
     .navbar {
         padding: 0.8rem 15px;
     }
     h1 { font-size: 1.8rem; }
     h2 { font-size: 1.4rem; word-break: break-word; }
     .profile-pic { width: 100px; height: 100px; }
     .skill-item { font-size: 0.8rem; padding: 6px 10px; }
    
    /* Ajuste específico para el footer en pantallas muy pequeñas */
    .footer { 
        font-size: 0.75rem; 
        padding: 15px 5%;
    }
}