/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #2c3e50;
  --secondary-color: #3498db;
  --accent-color: #e74c3c;
  --text-color: #2c3e50;
  --light-bg: #f8f9fa;
  --white: #ffffff;
  --shadow: 0 4px 15px rgba(0,0,0,0.1);
  --transition: all 0.3s ease;
  --gradient: linear-gradient(135deg, #3498db, #2c3e50);
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--light-bg);
  padding-top: 60px; /* Añadido para compensar el header fijo */
}

/* Navigation styles */
header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
}

nav {
  background: var(--gradient);
  padding: 1rem 0;
  box-shadow: var(--shadow);
}

nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

nav li {
  margin: 0 0.5rem;
}

nav a {
  color: var(--white);
  text-decoration: none;
  padding: 0.8rem 1.5rem;
  border-radius: 4px;
  transition: var(--transition);
  font-weight: 500;
  display: block;
}

nav a:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--white);
  transform: translateY(-2px);
}

nav a.active {
  background-color: var(--white);
  color: var(--primary-color);
}

/* Main content layout */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* Section styles */
section {
  margin-bottom: 3rem;
  background: var(--white);
  border-radius: 15px;
  box-shadow: var(--shadow);
  padding: 2rem;
}

section h2 {
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  font-size: 2rem;
  text-align: center;
}

/* Content grid */
.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.content-item {
  background: var(--light-bg);
  padding: 1.5rem;
  border-radius: 10px;
  transition: var(--transition);
}

.content-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.content-item h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

/* Profile card styles */
.profile-card {
  background: var(--white);
  border-radius: 15px;
  box-shadow: var(--shadow);
  overflow: hidden;
  max-width: 400px;
  margin: 0 auto;
}

.profile-image {
  position: relative;
  overflow: hidden;
  height: 300px;
}

.profile-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.profile-card:hover .profile-image img {
  transform: scale(1.05);
}

.container {
  padding: 1.5rem;
  text-align: center;
}

.container h4 {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
  font-size: 1.4rem;
  font-weight: 600;
}

.container .title {
  color: var(--secondary-color);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

/* Contact form styles */
#contact {
  max-width: 800px;
  margin: 0 auto;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.form-group {
  margin-bottom: 1rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
  font-weight: 500;
}

input[type=text],
input[type=email],
textarea {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
  transition: var(--transition);
}

input[type=text]:focus,
input[type=email]:focus,
textarea:focus {
  outline: none;
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.submit-btn {
  background: var(--gradient);
  color: var(--white);
  padding: 1rem 2rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 auto;
  transition: var(--transition);
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* Form validation styles */
.form-feedback {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 4px;
  text-align: center;
  display: none;
}

.form-feedback.success {
  display: block;
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.form-feedback.error {
  display: block;
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
  white-space: pre-line;
}

input.error,
textarea.error {
  border-color: #dc3545 !important;
  box-shadow: 0 0 0 2px rgba(220, 53, 69, 0.25) !important;
}

/* Responsive styles */
@media screen and (max-width: 768px) {
  body {
    padding-top: 50px;
  }

  nav ul {
    flex-direction: column;
    align-items: center;
  }

  nav li {
    margin: 0.5rem 0;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .main-content {
    padding: 1rem;
  }

  section {
    padding: 1.5rem;
  }
}

/* Skills section */
#skills {
  background-color: var(--white);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: var(--shadow);
}

#skills h1 {
  color: var(--primary-color);
  margin-bottom: 2rem;
  font-size: 2.2rem;
  text-align: center;
  position: relative;
  padding-bottom: 1rem;
}

#skills h1::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 3px;
  background: var(--gradient);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.skill-item {
  text-align: center;
  padding: 1.5rem;
  background: var(--light-bg);
  border-radius: 10px;
  transition: var(--transition);
}

.skill-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.skill-item i {
  font-size: 2.5rem;
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

.skill-item h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.skill-level {
  height: 6px;
  background: #ddd;
  border-radius: 3px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: var(--gradient);
  border-radius: 3px;
}

.skills-description {
  margin-top: 2rem;
}

.skills-description p {
  margin-bottom: 1.5rem;
  line-height: 1.8;
  color: var(--text-color);
  font-size: 1.1rem;
}

.skills-description aside {
  background-color: var(--light-bg);
  padding: 1.5rem;
  border-left: 4px solid var(--secondary-color);
  margin: 1.5rem 0;
  border-radius: 0 10px 10px 0;
}

/* Products section */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.product-card {
  background: var(--white);
  border-radius: 15px;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.product-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.product-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.product-card:hover .product-overlay {
  opacity: 1;
}

.view-project {
  color: var(--white);
  text-decoration: none;
  padding: 0.8rem 1.5rem;
  border: 2px solid var(--white);
  border-radius: 25px;
  transition: var(--transition);
}

.view-project:hover {
  background: var(--white);
  color: var(--primary-color);
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.tag {
  background: var(--light-bg);
  color: var(--primary-color);
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
  font-size: 0.9rem;
}