:root {
  --primary-color: #2563eb;
  --secondary-color: #1e40af;
  --accent-color: #fbbf24;
  --text-dark: #1f2937;
  --text-light: #6b7280;
  --bg-light: #f8fafc;
  --bg-card: #ffffff;
  --shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.15);
  --border-radius: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Poppins', sans-serif;
  line-height: 1.7;
  color: var(--text-dark);
  overflow-x: hidden;
}

/* Header mejorado */
header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  z-index: 1000;
  padding: 1rem 0;
  transition: var(--transition);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

.logo:hover {
  transform: scale(1.05);
}

nav {
  display: flex;
  gap: 2rem;
}

nav a {
  color: var(--text-dark);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 50px;
  transition: var(--transition);
  position: relative;
}

nav a:hover,
nav a.active {
  color: var(--primary-color);
  background: rgba(37, 99, 235, 0.1);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-dark);
}

/* Hero Section */
#hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #66e1ea 0%, #9c4ba2 100%);
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  text-align: center;
  color: white;
  z-index: 2;
  max-width: 800px;
  padding: 2rem;
  animation: fadeInUp 1s ease-out;
}

.hero-content h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  font-weight: 300;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  background: var(--accent-color);
  color: var(--text-dark);
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(251, 191, 36, 0.4);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(251, 191, 36, 0.6);
}

/* Secciones */
section {
  padding: 6rem 2rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  font-size: 1.1rem;
  margin-bottom: 4rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Sobre m¨ª mejorado */
#about {
  background: var(--bg-light);
}

.about-content {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 4rem;
  align-items: center;
}

.about-image {
  position: relative;
}

.about-image img {
  width: 100%;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.about-image::before {
  content: '';
  position: absolute;
  top: 20px;
  left: 20px;
  right: -20px;
  bottom: -20px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: var(--border-radius);
  z-index: -1;
  opacity: 0.1;
}

.about-text {
  font-size: 1.1rem;
  line-height: 1.8;
}

.about-text p {
  margin-bottom: 1.5rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.stat-item {
  text-align: center;
  padding: 1.5rem;
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
}

.stat-label {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* Hobbies mejorados */
#hobbies {
  background: white;
  padding: 4rem 1rem;
  overflow-x: auto;
}

.hobbies-grid {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE y Edge */
}

.hobbies-grid::-webkit-scrollbar {
  display: none; /* Chrome, Safari */
}

.hobby-card {
  flex: 0 0 auto;
  width: 240px;
  height: 320px;
  perspective: 1000px;
}

.hobby-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
  transform-style: preserve-3d;
  border-radius: var(--border-radius);
}

.hobby-card:hover .hobby-card-inner {
  transform: rotateY(180deg);
}

.hobby-card-front,
.hobby-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.hobby-card-front {
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hobby-card-front img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hobby-card-back {
  background: var(--primary-color);
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  transform: rotateY(180deg);
  padding: 2rem;
  text-align: center;
}

.hobby-card-back h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: white;
}

.hobby-card-back p {
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.6;
}


/* Habilidades mejoradas */
#skills {
  background: var(--bg-light);
}

.skills-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.skill-card {
  position: relative;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  overflow: hidden;
  background-size: cover;
  background-position: center;
  height: 300px;
}

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

.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1;
}

.skill-content {
  position: relative;
  z-index: 2;
  padding: 2rem;
  color: white;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.skill-icon {
  font-size: 3rem;
  color: var(--accent-color);
  margin-bottom: 1rem;
}

.skill-card h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: white;
}

.skill-card p {
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-color), #fbbf24);
  border-radius: 4px;
  transition: width 1s ease-out;
}

/* Footer */
footer {
  background: var(--text-dark);
  color: white;
  text-align: center;
  padding: 3rem 2rem 2rem;
}

.footer-content {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  margin-bottom: 2rem;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  text-decoration: none;
  border-radius: 50%;
  transition: var(--transition);
}

.social-link:hover {
  background: var(--accent-color);
  color: var(--text-dark);
  transform: translateY(-3px);
}

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

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: white;
    flex-direction: column;
    padding: 1rem;
    box-shadow: var(--shadow);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

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

  .stats {
    grid-template-columns: 1fr;
  }

  .hobbies-grid {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 480px) {
  section {
    padding: 4rem 1rem;
  }

  .header-container {
    padding: 0 1rem;
  }

  .hero-content {
    padding: 1rem;
  }
}