/* Variables */
:root {
  --primary-color: #4a90e2;
  --secondary-color: #2756ba;
  --background-dark: #0d0d0d;
  --background-medium: #1a1a1a;
  --background-light: #252525;
  --text-color: #e0e0e0;
  --text-light: #a0a0a0;
  --font-family: "Montserrat", sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--background-dark);
  color: var(--text-color);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

ul {
  list-style: none;
}

.section-title {
  font-size: 2.5em;
  text-align: center;
  margin-bottom: 60px;
  color: var(--text-color);
  font-weight: 700;
}

/* Scroll margin para navbar fijo */
#inicio,
#sobre-mi,
#educacion,
#skills,
#proyectos {
  scroll-margin-top: 80px;
}

/* Navbar */
.navbar {
  background-color: var(--background-dark);
  padding: 20px 0;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.3s ease;
}

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

.navbar .logo {
  font-size: 2em;
  font-weight: 700;
  color: var(--text-color);
  letter-spacing: 2px;
}

.navbar nav ul {
  display: flex;
  gap: 30px;
}

.navbar nav ul li a {
  color: var(--text-light);
  font-weight: 500;
  font-size: 0.95em;
  transition: color 0.3s ease;
  position: relative;
  padding-bottom: 5px;
}

.navbar nav ul li a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0%;
  height: 2px;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

.navbar nav ul li a:hover {
  color: var(--text-color);
}

.navbar nav ul li a:hover::after {
  width: 100%;
}

/* BOTÓN THEME TOGGLE */
.theme-toggle {
  width: 45px;
  height: 45px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(74, 144, 226, 0.1);
  border-radius: 50%;
  color: var(--primary-color);
  font-size: 1.2em;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.theme-toggle:hover {
  background: var(--primary-color);
  color: white;
  transform: rotate(20deg);
}

/* TEMA CLARO */
body.light-mode {
  --background-dark: #f5f5f5;
  --background-medium: #ffffff;
  --background-light: #eeeeee;
  --text-color: #1a1a1a;
  --text-light: #555555;
}

body.light-mode .navbar {
  background-color: #ffffff;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

body.light-mode .navbar .logo {
  color: #1a1a1a;
}

body.light-mode .navbar nav ul li a {
  color: #555555;
}

body.light-mode .navbar nav ul li a:hover {
  color: #1a1a1a;
}

body.light-mode .theme-toggle {
  background: rgba(74, 144, 226, 0.15);
  border-color: rgba(74, 144, 226, 0.3);
}

body.light-mode .hero {
  background: linear-gradient(135deg, #f5f5f5 0%, #eeeeee 100%);
}

body.light-mode .about {
  background: #ffffff;
}

body.light-mode .education {
  background: #f5f5f5;
}

body.light-mode .tech-stack {
  background: #ffffff;
}

body.light-mode .projects {
  background: #f5f5f5;
}

body.light-mode .footer {
  background: #ffffff;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

body.light-mode .course-item {
  background: linear-gradient(
    135deg,
    rgba(74, 144, 226, 0.08) 0%,
    rgba(39, 86, 186, 0.05) 100%
  );
  border: 1px solid rgba(74, 144, 226, 0.2);
}

body.light-mode .project-front,
body.light-mode .project-back {
  background: #ffffff;
  border: 1px solid rgba(74, 144, 226, 0.2);
}

body.light-mode .card {
  background: rgba(74, 144, 226, 0.1);
}

body.light-mode .front {
  background: linear-gradient(
    135deg,
    rgba(74, 144, 226, 0.12) 0%,
    rgba(39, 86, 186, 0.08) 100%
  );
  border: 1px solid rgba(74, 144, 226, 0.25);
}

body.light-mode .social-links a {
  background: rgba(74, 144, 226, 0.15);
  border: 1px solid rgba(74, 144, 226, 0.3);
}

/* Hero Section */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  background: var(--background-dark);
  position: relative;
  transition: background 0.3s ease;
}

.hero-content {
  display: flex;
  align-items: center;
  gap: 80px;
  padding: 60px 0;
}

.hero-image {
  width: 280px;
  height: 280px;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(74, 144, 226, 0.3);
  flex-shrink: 0;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-text {
  flex: 1;
}

.hero-text .greeting {
  font-size: 1.1em;
  color: var(--text-light);
  margin-bottom: 10px;
  font-weight: 400;
}

.hero-text .greeting span {
  color: var(--primary-color);
}

.hero-text .name {
  font-size: 4em;
  color: var(--text-color);
  margin-bottom: 10px;
  line-height: 1;
  font-weight: 700;
}

.hero-text .tagline {
  font-size: 2.5em;
  color: var(--text-color);
  line-height: 1.3;
  font-weight: 600;
}

.hero-text .tagline span {
  color: var(--primary-color);
  font-weight: 700;
}

/* About Section */
.about {
  padding: 100px 0;
  background: var(--background-dark);
  color: var(--text-color);
  transition: background 0.3s ease;
}

.about-content {
  max-width: 800px;
  text-align: center;
  margin: 0 auto;
}

.about-subtitle {
  font-size: 1.4rem;
  margin-bottom: 25px;
  color: var(--text-light);
}

.highlight {
  color: var(--primary-color);
  font-weight: 600;
}

.about-text {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-color);
  opacity: 0.9;
  max-width: 680px;
  margin: 0 auto;
}

.about-content {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.7s ease forwards;
}

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

/* Education Section */
.education {
  padding: 120px 0;
  background: var(--background-dark);
  transition: background 0.3s ease;
}

.education .section-title {
  color: var(--text-color);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.course-item {
  background: linear-gradient(
    135deg,
    rgba(74, 144, 226, 0.1) 0%,
    rgba(39, 86, 186, 0.05) 100%
  );
  border: 1px solid rgba(74, 144, 226, 0.2);
  border-radius: 15px;
  padding: 40px 30px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.course-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--primary-color),
    var(--secondary-color)
  );
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.course-item:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
  box-shadow: 0 15px 40px rgba(74, 144, 226, 0.2);
}

.course-item:hover::before {
  transform: scaleX(1);
}

.course-item h3 {
  font-size: 1.4em;
  color: var(--text-color);
  margin-bottom: 8px;
  font-weight: 600;
}

.course-item p {
  color: var(--text-light);
  font-size: 0.95em;
}

/* SKILLS-Section */
.tech-stack {
  padding: 120px 0;
  background: var(--background-dark);
  text-align: center;
  position: relative;
  transition: background 0.3s ease;
}

.tech-stack .section-title {
  color: var(--text-color);
}

.tech-intro {
  font-size: 1.15em;
  max-width: 900px;
  margin: 0 auto 60px;
  color: var(--text-light);
  line-height: 1.8;
}

.tech-intro span {
  color: var(--primary-color);
  font-weight: 600;
}

.tech-icons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 35px;
  margin-bottom: 80px;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.card-container {
  width: 100px;
  height: 100px;
  perspective: 1000px;
}

.card {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s ease;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 12px;
}

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

.front,
.back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-size: 1.1em;
  font-weight: bold;
  color: var(--text-color);
  overflow: hidden;
}

.front {
  background: linear-gradient(
    135deg,
    rgba(74, 144, 226, 0.08) 0%,
    rgba(39, 86, 186, 0.05) 100%
  );
  border: 1px solid rgba(74, 144, 226, 0.2);
  z-index: 2;
}

.front img {
  width: 70px;
  height: 70px;
  object-fit: contain;
}

.back {
  background: linear-gradient(
    135deg,
    rgba(74, 144, 226, 0.08) 0%,
    rgba(39, 86, 186, 0.05) 100%
  );
  transform: rotateY(180deg);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.jgp-logo-centered {
  position: relative;
  width: 280px;
  height: 280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 0 50px rgba(74, 144, 226, 0.5));
  animation: glow 3s ease-in-out infinite;
}

.jgp-logo-centered img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

@keyframes glow {
  0%,
  100% {
    filter: drop-shadow(0 0 50px rgba(74, 144, 226, 0.5));
  }
  50% {
    filter: drop-shadow(0 0 80px rgba(74, 144, 226, 0.7));
  }
}

/* Projects Section */
.projects {
  padding: 120px 0;
  background: var(--background-dark);
  color: var(--text-color);
  transition: background 0.3s ease;
}

.projects .section-title {
  color: var(--text-color);
}

.projects .container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 40px;
  width: 100%;
  max-width: 1000px;
  margin-bottom: 60px;
}

.project-card {
  width: 100%;
  height: 450px;
  perspective: 1000px;
}

.project-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

.project-front,
.project-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  background: var(--background-light);
  border: 1px solid rgba(74, 144, 226, 0.2);
  border-radius: 15px;
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: background 0.3s ease;
}

.project-front .img-area {
  width: 100%;
  height: 250px;
  overflow: hidden;
  border-radius: 15px 15px 0 0;
  flex-shrink: 0;
}

.project-front .img-area img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

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

.project-front h3 {
  font-size: 1.8em;
  color: var(--primary-color);
  margin: 25px 25px 15px 25px;
  font-weight: 700;
  text-align: center;
}

.project-front p {
  font-size: 0.95em;
  color: var(--text-light);
  line-height: 1.6;
  margin: 0 25px 25px 25px;
  flex: 1;
  text-align: center;
}

.project-back {
  transform: rotateY(180deg);
  padding: 0;
  align-items: center;
  text-align: center;
}

.project-back .img-area {
  width: 100%;
  height: 250px;
  border-radius: 15px 15px 0 0;
  overflow: hidden;
  background: rgba(74, 144, 226, 0.1);
  flex-shrink: 0;
}

.project-back .img-area img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-back h3 {
  font-size: 1.8em;
  color: var(--primary-color);
  margin: 20px 25px 10px 25px;
  font-weight: 700;
}

.project-back p {
  font-size: 1em;
  color: var(--text-light);
  line-height: 1.6;
  margin: 0 25px 25px 25px;
  max-width: 100%;
}

#toggle-proyectos:checked ~ .projects-grid .project-inner {
  transform: rotateY(180deg);
}

.btn-vermas {
  display: inline-block;
  background: linear-gradient(
    135deg,
    rgba(45, 131, 230, 0.322) 0%,
    rgba(18, 80, 214, 0.521) 100%
  );
  color: #fff;
  padding: 15px 40px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1.05em;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 10px 30px rgba(74, 144, 226, 0.3);
  text-align: center;
}

.btn-vermas:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(74, 144, 226, 0.5);
}

/* Footer */
.footer {
  background: var(--background-dark);
  padding: 80px 0 40px;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.3s ease;
}

.footer .section-title {
  font-size: 2em;
  margin-bottom: 30px;
  color: var(--text-color);
}

.contact-info p {
  margin-bottom: 30px;
  font-size: 1.05em;
  color: var(--text-light);
}

.social-links {
  margin-bottom: 40px;
  display: flex;
  justify-content: center;
  gap: 30px;
}

.social-links a {
  width: 50px;
  height: 50px;
  background: rgba(74, 144, 226, 0.1);
  border: 1px solid rgba(74, 144, 226, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-size: 1.3em;
  transition: all 0.3s ease;
}

.social-links a:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(74, 144, 226, 0.3);
}

.footer .copyright {
  color: var(--text-light);
  font-size: 0.9em;
}

/* Media Queries */
@media (max-width: 992px) {
  .hero-content {
    flex-direction: column;
    gap: 40px;
    text-align: center;
  }

  .courses-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
  }

  .project-card {
    height: 500px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .navbar nav ul {
    gap: 15px;
  }

  .navbar nav ul li a {
    font-size: 0.85em;
  }

  .hero-text .name {
    font-size: 3em;
  }

  .hero-text .tagline {
    font-size: 1.8em;
  }

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

  .card-container {
    width: 80px;
    height: 80px;
  }

  .front img {
    width: 55px;
    height: 55px;
  }

  .jgp-logo-centered {
    width: 200px;
    height: 200px;
  }

  .project-card {
    height: 480px;
  }

  .project-front .img-area {
    height: 200px;
  }

  .project-front h3 {
    font-size: 1.5em;
    margin: 20px 20px 12px 20px;
  }

  .project-front p {
    font-size: 0.9em;
    margin: 0 20px 20px 20px;
  }

  .project-back h3 {
    font-size: 1.5em;
  }

  .project-back p {
    font-size: 0.9em;
  }
  #educacion {
    scroll-margin-top: 80px;
  }

  #skills {
    scroll-margin-top: 80px;
  }

  #proyectos {
    scroll-margin-top: 80px;
  }

  #inicio {
    scroll-margin-top: 80px;
  }

  #sobre-mi {
    scroll-margin-top: 80px;
  }

  /* BOTÓN THEME TOGGLE */
  .theme-toggle {
    width: 45px;
    height: 45px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(74, 144, 226, 0.1);
    border-radius: 50%;
    color: var(--primary-color);
    font-size: 1.2em;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
  }

  .theme-toggle:hover {
    background: var(--primary-color);
    color: white;
    transform: rotate(20deg);
  }

  .theme-toggle i {
    transition: transform 0.3s ease;
  }

  /* TEMA CLARO */
  body.light-mode {
    --background-dark: #f5f5f5;
    --background-medium: #ffffff;
    --background-light: #eeeeee;
    --text-color: #1a1a1a;
    --text-light: #555555;
    --primary-color: #4a90e2;
    --secondary-color: #2756ba;
  }

  body.light-mode .navbar {
    background-color: #ffffff;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  }

  body.light-mode .navbar .logo {
    color: #1a1a1a;
  }

  body.light-mode .navbar nav ul li a {
    color: #555555;
  }

  body.light-mode .navbar nav ul li a:hover {
    color: #1a1a1a;
  }

  body.light-mode .theme-toggle {
    background: rgba(74, 144, 226, 0.15);
    border-color: rgba(74, 144, 226, 0.3);
  }

  body.light-mode .hero {
    background: linear-gradient(135deg, #f5f5f5 0%, #eeeeee 100%);
  }

  body.light-mode .about {
    background: #ffffff;
  }

  body.light-mode .education {
    background: #f5f5f5;
  }

  body.light-mode .tech-stack {
    background: #ffffff;
  }

  body.light-mode .projects {
    background: #f5f5f5;
  }

  body.light-mode .footer {
    background: #ffffff;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
  }

  body.light-mode .course-item {
    background: linear-gradient(
      135deg,
      rgba(74, 144, 226, 0.08) 0%,
      rgba(39, 86, 186, 0.05) 100%
    );
    border: 1px solid rgba(74, 144, 226, 0.2);
  }

  body.light-mode .project-front,
  body.light-mode .project-back {
    background: #ffffff;
    border: 1px solid rgba(74, 144, 226, 0.2);
  }

  body.light-mode .card {
    background: rgba(74, 144, 226, 0.1);
  }

  body.light-mode .front {
    background: linear-gradient(
      135deg,
      rgba(74, 144, 226, 0.12) 0%,
      rgba(39, 86, 186, 0.08) 100%
    );
    border: 1px solid rgba(74, 144, 226, 0.25);
  }

  body.light-mode .social-links a {
    background: rgba(74, 144, 226, 0.15);
    border: 1px solid rgba(74, 144, 226, 0.3);
  }

  /* Animación del icono */
  body.light-mode .theme-toggle i::before {
    content: "\f186"; /* Icono de sol */
  }

  body .theme-toggle i {
    content: "\f186";
  }

  /* Media queries para navbar */
  @media (max-width: 768px) {
    .navbar nav ul {
      gap: 20px;
    }

    .navbar nav ul li a {
      font-size: 0.9em;
    }

    .theme-toggle {
      width: 40px;
      height: 40px;
      font-size: 1em;
    }
  }
  .cv-btn {
    background-color: var(--primary-color);
    padding: 10px 16px;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    text-decoration: none;
    margin-left: 15px;
    transition: 0.3s;
  }

  .cv-btn:hover {
    background-color: var(--secondary-color);
    transform: scale(1.05);
  }
}