:root {
  --color-background: #0f172a;
  --color-surface: #1e293b;
  --color-primary: #4ECDC4;
  --color-secondary: #3d5afe;
  --color-accent: #ff6b6b;
  --color-text-primary: #f8fafc;
  --color-text-secondary: #cbd5e1;
  --color-text-tertiary: #94a3b8;
  --border-radius: 8px;
  --transition: all 0.3s ease;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-xxl: 2rem;
  --font-size-xxxl: 3rem;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  background-color: var(--color-background);
  color: var(--color-text-primary);
  overflow-x: hidden;
}

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

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
}

/* Containers and layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: var(--spacing-md) 0;
}

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

.logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
}

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

.nav-links a {
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav-links a svg {
  width: 1.2em;
  height: 1.2em;
}

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

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--color-text-primary);
  border-radius: 5px;
  transition: var(--transition);
}

/* Hero Section */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  padding-top: 60px;
}

.hero h1 {
  font-size: var(--font-size-xxxl);
  margin-bottom: var(--spacing-md);
  font-weight: 700;
}

.hero .subtitle {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-xl);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.highlight {
  color: var(--color-primary);
  font-weight: 500;
}

/* Social Links */
.social-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  background-color: var(--color-surface);
  transition: var(--transition);
}

.social-link svg {
  width: 1.2em;
  height: 1.2em;
}

.social-link:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  background-color: var(--color-primary);
  color: var(--color-background);
}

/* Sections */
section {
  padding: var(--spacing-xxl) 0;
}

.section-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-primary);
}

.section-title svg {
  width: 1.2em;
  height: 1.2em;
}

/* About Section */
.about-content {
  background-color: var(--color-surface);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
}

.about-content p {
  margin-bottom: var(--spacing-md);
}

.about-content p:last-child {
  margin-bottom: 0;
}

/* Skills Section */
.skills-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

.skill-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100px;
  height: 100px;
  background-color: var(--color-surface);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  transition: var(--transition);
  text-align: center;
}

.skill-badge svg {
  width: 2.5em;
  height: 2.5em;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.skill-badge:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  background-color: rgba(78, 205, 196, 0.1);
  border: 1px solid var(--color-primary);
}

.skill-badge span {
  font-size: var(--font-size-sm);
  font-weight: 500;
}

/* Timeline (Education) */
.timeline {
  position: relative;
  max-width: 100%;
  margin: 0 auto;
  padding: auto;
}

.timeline::after {
  content: '';
  position: absolute;
  width: 2px;
  background-color: var(--color-primary);
  top: 0;
  bottom: 0;
  left: 20px;
  margin-left: -1px;
}

.timeline-item {
  padding: 0 var(--spacing-lg) var(--spacing-xl) 60px;
  position: relative;
}

.timeline-dot {
  position: absolute;
  width: 16px;
  height: 16px;
  left: 12px;
  background-color: var(--color-primary);
  border-radius: 50%;
  z-index: 1;
}

.timeline-content {
  padding: var(--spacing-lg);
  background-color: var(--color-surface);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  position: relative;
}

.timeline-title {
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.timeline-title svg {
  width: 1.2em;
  height: 1.2em;
}

.timeline-subtitle {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xs);
  font-weight: 400;
}

.timeline-period {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: rgba(78, 205, 196, 0.1);
  color: var(--color-primary);
  border-radius: var(--border-radius);
  font-size: var(--font-size-xs);
  margin-bottom: var(--spacing-sm);
}

.timeline-description {
  color: var(--color-text-tertiary);
}

/* Certificates */
.certificates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.certificate-card {
  background-color: var(--color-surface);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

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

.certificate-header {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.certificate-logo {
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--spacing-md);
}

.certificate-logo svg {
  width: 1.25em;
  height: 1.25em;
  color: var(--color-background);
}

.certificate-meta {
  display: flex;
  flex-direction: column;
}

.certificate-meta span:first-child {
  font-weight: 500;
}

.certificate-meta span:last-child {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

.certificate-title {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.certificate-description {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.project-card {
  background-color: var(--color-surface);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  cursor: pointer;
}

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

.project-image {
  height: 200px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.project-content {
  padding: var(--spacing-lg);
}

.project-title {
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.project-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
}

.project-techs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.tech-badge {
  font-size: var(--font-size-xs);
  padding: 4px 8px;
  background-color: rgba(78, 205, 196, 0.1);
  color: var(--color-primary);
  border-radius: var(--border-radius);
}

.project-btn {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.project-btn svg {
  width: 1.2em;
  height: 1.2em;
}

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

/* Footer */
.footer {
  background-color: var(--color-surface);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-xxl);
}

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

.footer-links {
  display: flex;
  gap: var(--spacing-md);
}

.footer-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.footer-link svg {
  width: 1.2em;
  height: 1.2em;
}

.footer-link:hover {
  color: var(--color-primary);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  z-index: 2000;
  overflow-y: auto;
}

.modal-content {
  background-color: var(--color-surface);
  margin: 5% auto;
  padding: var(--spacing-xl);
  width: 90%;
  max-width: 1000px;
  border-radius: var(--border-radius);
  position: relative;
}

.close-modal {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  font-size: var(--font-size-xl);
  cursor: pointer;
  color: var(--color-text-tertiary);
  z-index: 1;
}

.close-modal:hover {
  color: var(--color-primary);
}

/* Swiper styles */
.swiper {
  width: 100%;
  height: 400px;
  margin: var(--spacing-lg) 0;
  border-radius: var(--border-radius);
  overflow: hidden;
}

.swiper-slide {
  display: flex;
  align-items: center;
  justify-content: center;
}

.swiper-slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.swiper-button-next,
.swiper-button-prev {
  color: var(--color-primary);
}

.swiper-pagination-bullet {
  background: var(--color-primary);
}

.modal-title {
  font-size: var(--font-size-xxl);
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.modal-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

.modal-features {
  list-style: none;
  margin: var(--spacing-md) 0;
}

.modal-features li {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.modal-features li::before {
  content: '•';
  color: var(--color-primary);
}

.modal-techs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin: var(--spacing-md) 0;
}

.modal-actions {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

/* Particles Background */
#particles-js {
  position: fixed;
  width: 100%;
  height: 100%;
  background-color: var(--color-background);
  z-index: -1;
}

/* Responsive Design */
@media screen and (max-width: 1000px) {

  .contact-modal-content {
    width: 95%;
    padding: var(--spacing-lg);
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-background);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-md);
  }

  .nav-links.active {
    display: flex;
  }

  .hamburger {
    display: flex;
  }

  .hero h1 {
    font-size: var(--font-size-xxl);
  }

  .hero .subtitle {
    font-size: var(--font-size-lg);
  }

  .social-links {
    flex-wrap: wrap;
  }

  .projects-grid,
  .certificates-grid {
    grid-template-columns: 1fr;
  }

  .footer .container {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }

  .modal-content {
    width: 95%;
    margin: 5% auto;
    padding: var(--spacing-md);
  }

  .swiper {
    height: 300px;
  }
}

@media screen and (max-width: 480px) {


  .contact-modal-content {
    padding: var(--spacing-md);
  }
  .skill-badge {
    width: 100px;
    height: 100px;
  }

  .hero h1 {
    font-size: var(--font-size-xl);
  }

  .hero .subtitle {
    font-size: var(--font-size-md);
  }

  .section-title {
    font-size: var(--font-size-xl);
  }

  .modal-content {
    padding: var(--spacing-sm);
  }

  .swiper {
    height: 200px;
  }

  .modal-actions {
    flex-direction: column;
  }
}

/* Contact Button Specific Styling */
.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  background-color: var(--color-primary);
  color: var(--color-background);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  color: var(--color-background);   /* aquí pones el color que quieras */
  font-weight: bold;  
}

.contact-btn:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: var(--shadow-md);
  background-color: var(--color-accent);
  color: var(--color-on-accent); 
}

/* Contact Modal */
.contact-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  z-index: 2000;
  backdrop-filter: blur(5px);
}

.contact-modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.contact-modal-content {
  background-color: var(--color-surface);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  width: 90%;
  max-width: 500px;
  position: relative;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { 
    transform: translateY(50px);
    opacity: 0;
  }
  to { 
    transform: translateY(0);
    opacity: 1;
  }
}

.close-modal {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  font-size: var(--font-size-xl);
  cursor: pointer;
  color: var(--color-text-tertiary);
  background: none;
  border: none;
  padding: var(--spacing-xs);
  border-radius: 50%;
  transition: var(--transition);
}

.close-modal:hover {
  color: var(--color-accent);
  background-color: rgba(255, 107, 107, 0.1);
}

.contact-form-title {
  color: var(--color-primary);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.contact-form-title svg {
  width: 1.5em;
  height: 1.5em;
}

/* Form Styles */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-label {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: var(--font-size-sm);
}

.form-input,
.form-textarea {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  background-color: var(--color-background);
  color: var(--color-text-primary);
  font-size: var(--font-size-md);
  transition: var(--transition);
  resize: vertical;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.1);
}

.form-textarea {
  min-height: 120px;
  font-family: inherit;
}

.submit-btn {
  background-color: var(--color-primary);
  color: var(--color-background);
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius);
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.submit-btn:hover {
  background-color: #3cb8b1;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.submit-btn:disabled {
  background-color: var(--color-text-tertiary);
  cursor: not-allowed;
  transform: none;
}

.submit-btn svg {
  width: 1.2em;
  height: 1.2em;
}

/* Loading animation */
.loading {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Success/Error Messages */
.message {
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin-top: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 500;
}

.message svg {
  width: 1.2em;
  height: 1.2em;
}

.message.success {
  background-color: rgba(34, 197, 94, 0.1);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.message.error {
  background-color: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Animations */
.fade-in {
  animation: fadeInUp 0.8s ease forwards;
}

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