/* ===== VARIABLES CSS ===== */
:root {
  /* Colores principales */
  --primary-color: #2c3e50;
  --secondary-color: #ecf0f1;
  --accent-color: #3498db;
  --text-color: #333;
  --background-color: #f5f5f5;
  --white: #ffffff;

  /* Dark mode colors */
  --dark-bg: #121212;
  --dark-text: #e0e0e0;
  --dark-secondary: #1e1e1e;
  --dark-accent: #5dade2;

  /* Tipografía */
  --font-family-primary: 'Arial', sans-serif;
  --font-family-secondary: 'Open Sans', sans-serif;
  --font-family-heading: 'Montserrat', sans-serif;

  /* Espaciado */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;

  /* Bordes */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;
  --border-radius-circle: 50%;

  /* Sombras */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.3);

  /* Transiciones */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ===== RESET Y ESTILOS BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family-primary);
  color: var(--text-color);
  background-color: var(--background-color);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Dark mode */
body.dark-mode {
  --background-color: var(--dark-bg);
  --text-color: var(--dark-text);
  --secondary-color: var(--dark-secondary);
  --accent-color: var(--dark-accent);
}

/* ===== HERO SECTION ===== */
.hero-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  color: var(--white);
  padding: var(--spacing-xxl) 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  opacity: 0.1;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 1200px;
  padding: 0 var(--spacing-lg);
  position: absolute;
  top: var(--spacing-lg);
  z-index: 10;
}

.logo img {
  height: 60px;
  width: auto;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
}

.nav-menu a {
  color: var(--white);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-normal);
}

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

.dark-mode-toggle {
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
  transition: transform var(--transition-normal);
}

.dark-mode-toggle:hover {
  transform: scale(1.1);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  max-width: 1200px;
  width: 100%;
  padding: 0 var(--spacing-lg);
  z-index: 5;
  align-items: center;
}

.hero-text h1 {
  font-family: var(--font-family-heading);
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.9;
}

.hero-description {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
}

.btn-cta {
  display: inline-block;
  background-color: var(--accent-color);
  color: var(--white);
  padding: var(--spacing-md) var(--spacing-xl);
  text-decoration: none;
  border-radius: var(--border-radius-md);
  font-weight: bold;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
}

.btn-cta:hover {
  background-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.hero-image img {
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  margin: 0 auto;
}

/* ===== GENERAL LAYOUT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.cv-content {
  padding: var(--spacing-xxl) 0;
}

.section {
  padding: var(--spacing-xxl) 0;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.section.animate {
  opacity: 1;
  transform: translateY(0);
}

.section-title {
  color: var(--primary-color);
  font-family: var(--font-family-heading);
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: var(--spacing-xxl);
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background-color: var(--accent-color);
  margin: var(--spacing-md) auto 0;
}

/* ===== PROFILE SECTION ===== */
.profile-section {
  background-color: var(--secondary-color);
}

.profile-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-xxl);
  align-items: start;
}

.profile-text {
  font-size: 1.1rem;
  line-height: 1.7;
}

.profile-achievements {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.achievement-card {
  background-color: var(--white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

.achievement-card:hover {
  transform: translateY(-5px);
}

.achievement-card h3 {
  color: var(--accent-color);
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
}

.achievement-card p {
  color: var(--text-color);
  font-weight: 500;
}

/* ===== EXPERIENCE SECTION ===== */
.experience-timeline {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.experience-item {
  background-color: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.experience-header {
  margin-bottom: var(--spacing-lg);
}

.experience-header h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.company {
  color: var(--accent-color);
  font-weight: 500;
}

.responsibilities {
  list-style-type: disc;
  padding-left: var(--spacing-xl);
  margin: 0;
}

.responsibilities li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.6;
}

/* ===== SKILLS SECTION ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.skill-item {
  background-color: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.skill-item h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.progress-bar {
  background-color: var(--secondary-color);
  border-radius: var(--border-radius-md);
  height: 20px;
  width: 100%;
  margin-bottom: var(--spacing-md);
  overflow: hidden;
}

.progress-fill {
  background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
  height: 100%;
  border-radius: var(--border-radius-md);
  transition: width var(--transition-slow);
}

.progress-text {
  text-align: center;
  font-weight: bold;
  color: var(--primary-color);
}

/* ===== CERTIFICATIONS SECTION ===== */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.certification-item {
  background-color: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.certification-item h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

/* ===== CONTACT SECTION ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: start;
}

.contact-info p {
  margin-bottom: var(--spacing-md);
  font-size: 1.1rem;
}

.contact-info strong {
  color: var(--primary-color);
}

.social-links {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

.social-links img {
  width: 40px;
  height: 40px;
  transition: transform var(--transition-normal);
}

.social-links img:hover {
  transform: scale(1.1);
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--primary-color);
  color: var(--white);
  text-align: center;
  padding: var(--spacing-xl) 0;
}

/* ===== MEDIA QUERIES ===== */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .nav-menu {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text h1 {
    font-size: 2rem;
  }

  .profile-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .skills-grid,
  .certifications-grid {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 1.5rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-description {
    font-size: 0.9rem;
  }

  .btn-cta {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.9rem;
  }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes progressAnimation {
  from {
    width: 0%;
  }
  to {
    width: var(--progress-width);
  }
}

.progress-fill {
  animation: progressAnimation 2s ease-out forwards;
}

/* ===== UTILITY CLASSES ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== UTILITY CLASSES ===== */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }