:root {
  --primary: rgba(21, 101, 192, 0.8);
  --text-primary: rgba(21, 101, 192);
  --secondary: #ffd700;
  --accent: #ffc107;
  --text: #333333;
  --light: rgba(250, 250, 250, 0.8);
  --dark: #212121;
  --paper: rgba(233, 229, 194, 0.5);
  --paper-texture: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 800 800"><filter id="noise"><feTurbulence type="fractalNoise" baseFrequency="0.1" numOctaves="5" stitchTiles="stitch"/><feColorMatrix type="matrix" values="1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0.7 0"/></filter><rect width="100%" height="100%" filter="url(%23noise)" opacity="0.7"/></svg>');
  --paper-overlay: rgba(245, 245, 245, 0.85);
  --color-transition: background-color 0.3s ease, color 0.3s ease;
  --theme-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --menu-mobile: rgba(255, 215, 94, 0.9);
  --text-info: rgba(245, 245, 245, 0.85);
  --icons-info: rgba(21, 101, 192);
  --background-contact: linear-gradient(
    -45deg,
    rgba(158, 34, 34, 0.6),
    rgba(231, 60, 126, 0.6),
    rgba(136, 213, 241, 0.6),
    rgba(255, 23, 93, 0.6)
  );
}

[data-theme="dark"] {
  --primary: #64b5f6;
  --secondary: #ffd700;
  --accent: #ffca28;
  --text: #e0e0e0;
  --light: rgba(61, 61, 61, 0.6);
  --dark: #e0e0e0;
  --paper: rgb(30, 30, 30, 0.9);
  --paper-texture: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 800 800"><filter id="noise"><feTurbulence type="fractalNoise" baseFrequency="0.1" numOctaves="5" stitchTiles="stitch"/><feColorMatrix type="matrix" values="1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0.7 0"/></filter><rect width="100%" height="100%" filter="url(%23noise)" opacity="0.7"/></svg>');
  --paper-overlay: rgba(30, 30, 30, 0.85);
  --menu-mobile: rgba(92, 69, 2, 0.9);
  --text-info: rgba(245, 245, 245, 0.85);
  --icons-info: rgba(21, 101, 192);
  --background-contact: linear-gradient(
    -45deg,
    rgba(238, 119, 82, 0.6),
    rgba(231, 60, 126, 0.6),
    rgba(35, 166, 213, 0.6),
    rgba(12, 83, 67, 0.6)
  );
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", "Segoe UI", Roboto, -apple-system, sans-serif;
  font-weight: 300;
  -webkit-tap-highlight-color: transparent;
}

strong {
  font-weight: 600;
}

body {
  background: var(--paper-texture);
  background-color: var(--paper);
  color: var(--text);
  line-height: 1.6;
  position: relative;

  transition: var(--theme-transition);
  will-change: background-color, color;
}

body::before {
  content: "";
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    rgba(255, 255, 255, 0.1) 0%,
    rgba(255, 255, 255, 0) 50%,
    rgba(0, 0, 0, 0.03) 51%,
    rgba(0, 0, 0, 0.08) 100%
  );
  background-blend-mode: soft-light;
  pointer-events: none;
  z-index: -1;
  opacity: 0.6;
  transition: var(--theme-transition);
}

[data-theme="dark"] body::before {
  background: linear-gradient(
    rgba(255, 255, 255, 0.05) 0%,
    rgba(255, 255, 255, 0) 50%,
    rgba(0, 0, 0, 0.1) 51%,
    rgba(0, 0, 0, 0.15) 100%
  );
  opacity: 0.5;
}

body::after {
  content: "";
  position: fixed;
  top: 15px;
  left: 15px;
  right: 15px;
  bottom: 15px;
  pointer-events: none;
  z-index: -1;
  transition: var(--theme-transition);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  background-color: var(--paper-overlay);
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.15);
  position: fixed;
  width: 100%;
  z-index: 1000;
  transition: var(--theme-transition);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  will-change: background-color;
}

[data-theme="dark"] header {
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
}

.logo {
  font-size: 24px;
  font-weight: 400;
  color: var(--primary);
  text-decoration: none;
  transition: var(--color-transition);
}

.logo span {
  color: var(--secondary);
}

.nav-links {
  display: flex;
  list-style: none;
}

.nav-links li {
  margin-left: 30px;
}

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

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

.menu-toggle {
  display: none;
  cursor: pointer;
  width: 30px;
  height: 24px;
  position: relative;
  background: transparent;
  border: none;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  position: absolute;
  height: 3px;
  width: 100%;
  background: var(--primary);
  border-radius: 3px;
  left: 0;
  transform: rotate(0deg);
  transition: all 0.3s ease-in-out;
}

.menu-toggle span:nth-child(1) {
  top: 0;
}

.menu-toggle span:nth-child(2),
.menu-toggle span:nth-child(3) {
  top: 10px;
}

.menu-toggle span:nth-child(4) {
  top: 20px;
}

.menu-toggle.active span:nth-child(1) {
  top: 10px;
  width: 0%;
  left: 50%;
}

.menu-toggle.active span:nth-child(2) {
  transform: rotate(45deg);
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg);
}

.menu-toggle.active span:nth-child(4) {
  top: 10px;
  width: 0%;
  left: 50%;
}

.theme-toggle {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  z-index: 999;
  transition: var(--theme-transition);
  will-change: transform;
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.35);
}

.theme-toggle i {
  position: absolute;
  transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55),
    opacity 0.3s ease;
  will-change: transform, opacity;
}

.theme-toggle i.fa-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.theme-toggle i.fa-sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
  color: var(--secondary);
}

[data-theme="dark"] .theme-toggle i.fa-moon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle i.fa-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.btn {
  display: inline-block;
  background-color: var(--secondary);
  color: #333; /* Cambiado a color oscuro fijo para mejor contraste */
  padding: 12px 30px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.btn::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0));
  opacity: 0;
  transition: opacity 0.3s;
}

.btn:hover::after {
  opacity: 1;
}

.btn-outline {
  background-color: transparent;
  border: 2px solid white;
  margin-left: 15px;
  color: white;
}

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

.about {
  padding: 100px 0;
  background-color: var(--paper);
  position: relative;
}

.about::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 20px;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.05), transparent);
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
  color: var(--primary);
  position: relative;
}

.section-title h2 {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.section-title p {
  color: var(--text);
  max-width: 700px;
  margin: 0 auto;
}

.about-content {
  display: flex;
  align-items: center;
  gap: 50px;
}

.about-img {
  flex: 1;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
  border: 8px solid white;
  position: relative;
  transform: translateY(50px);
  opacity: 0;
  transition: all 0.8s ease;
}

.about-img.visible {
  transform: translateY(0);
  opacity: 1;
}

.about-img::before {
  content: "";
  position: absolute;
  top: -15px;
  left: -15px;
  right: -15px;
  bottom: -15px;
  border: 1px solid var(--secondary);
  border-radius: 15px;
  z-index: -1;
  opacity: 0.5;
}

.about-img img {
  width: 100%;
  height: auto;
  display: block;
}

.about-text {
  flex: 1;
  transform: translateY(50px);
  opacity: 0;
  transition: all 0.8s ease 0.2s;
}

.about-text.visible {
  transform: translateY(0);
  opacity: 1;
}

.about-text h3 {
  font-size: 1.8rem;
  margin-bottom: 10px;
  color: var(--primary);
}

.about-text h4 {
  font-size: 1.3rem;
  letter-spacing: 0.4rem;
  margin-bottom: 30px;
  font-family: "Monserrat", "Poppins";
  color: var(--primary);
}

.about-text p {
  margin-bottom: 20px;
  color: var(--text);
}

.services {
  padding: 100px 0;
  background-color: var(--light);
  position: relative;
}

.services::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 20px;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.05), transparent);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.service-card {
  background: var(--paper-texture);
  background-color: var(--paper);
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  border: 1px solid rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
  transform: translateY(50px);
  opacity: 0;
  transform-style: preserve-3d;
  transition: all 0.6s ease, transform 0.3s ease;
  will-change: transform, box-shadow;
  cursor: pointer;
}

.service-card.visible {
  transform: translateY(0);
  opacity: 1;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: var(--secondary);
}

.service-icon {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: var(--primary);
}

.service-card p {
  color: var(--text);
}

.testimonials {
  padding: 100px 0;
  background-color: var(--paper);
  position: relative;
}

.testimonials::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 20px;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.05), transparent);
}

.testimonial-slider {
  display: flex;
  flex-direction: column;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  gap: 2rem;
}

.testimonial {
  padding: 30px;
  background-color: var(--light);
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  position: relative;
  transform: scale(0.95);
  opacity: 0;
  transition: all 0.8s ease;
}

.testimonial.visible {
  transform: scale(1);
  opacity: 1;
}

.testimonial::after {
  content: "";
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 15px solid transparent;
  border-right: 15px solid transparent;
  border-top: 15px solid var(--light);
}

.testimonial-text {
  font-size: 1.2rem;
  font-style: italic;
  color: var(--text);
  margin-bottom: 30px;
  position: relative;
}

.testimonial-text::before,
.testimonial-text::after {
  content: '"';
  font-size: 3rem;
  color: var(--secondary);
  opacity: 0.3;
  position: absolute;
}

.testimonial-text::before {
  top: -20px;
  left: -10px;
}

.testimonial-text::after {
  bottom: -40px;
  right: -10px;
}

.testimonial-author {
  font-weight: 700;
  color: var(--primary);
}

.contact {
  padding: 100px 0;
  background: var(--background-contact);
  position: relative;
  background-size: 400% 400%;
}

.contact::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 20px;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.05), transparent);
}

.contact-container {
  display: flex;
  gap: 50px;
}

.contact-info {
  flex: 1;
  transform: translateX(-50px);
  opacity: 0;
  transition: all 0.8s ease;
}

.contact-info.visible {
  transform: translateX(0);
  opacity: 1;
}

.contact-info h3 {
  text-align: center;
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: var(--primary);
}

.contact-info p {
  margin-bottom: 30px;
  color: var(--text);
}

.contact-details {
  margin-bottom: 30px;
}

.contact-item {
  display: flex;
  padding: 0.5rem;
  margin-bottom: 15px;
  height: 4rem;
  border: solid 2px white;
  cursor: pointer;
}

.contact-item a {
  text-decoration: none;
}

.contact-item:hover {
  background-color: var(--accent);
  --text: var(--text);
}

.info-item {
  display: flex;
  align-items: center;
  height: 100%;
  color: var(--text-info);
  transition: color 0.3s ease;
}

.contact-icon {
  width: 40px;
  height: 40px;
  background-color: var(--icons-info);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 15px;
  flex-shrink: 0;
}

.contact-form {
  flex: 1;
  background-color: var(--paper); 
  background-blend-mode: overlay; 
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transform: translateX(50px);
  opacity: 0;
  transition: all 0.8s ease 0.2s;
  position: relative;
  z-index: 1;
}
.contact-form.visible {
  transform: translateX(0);
  opacity: 1;
}

[data-theme="dark"] .contact-form {
  background-color: rgba(168, 154, 48, 0.562);
}

[data-theme="dark"] .form-control {
  background-color: rgba(30, 30, 30, 0.8);
  color: var(--text);
  border-color: #444;
}

[data-theme="dark"] .form-control:focus {
  background-color: var(--light);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--primary);
}

.form-control {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 1rem;
  transition: border-color 0.3s;
  background-color: var(--paper-overlay);
  color: var(--text);
}

.form-control:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 2px rgba(21, 101, 192, 0.2);
  background-color: white; 
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

footer {
  background: linear-gradient(135deg, var(--primary), rgba(27, 82, 160, 0.5));
  color: white;
  padding: 50px 0 20px;
  text-align: center;
  position: relative;
}

[data-theme="dark"] footer {
  background: linear-gradient(
    135deg,
    rgba(40, 91, 168, 0.6),
    rgba(1, 23, 56, 0.6)
  );
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 20px;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.1), transparent);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 40px;
}

.footer-column {
  flex: 1;
  text-align: left;
}

.footer-column h3 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  color: var(--accent);
}

.footer-column ul {
  list-style: none;
}

.footer-column ul li {
  margin-bottom: 10px;
}

.footer-column a {
  color: white;
  text-decoration: none;
  transition: color 0.3s;
}

.footer-column a:hover {
  color: var(--accent);
}

.social-links {
  display: flex;
  gap: 15px;
}

.social-links a {
  color: var(--text);
  font-size: 1.2rem;
  transition: color 0.3s;
}

.social-links a:hover {
  color: var(--secondary);
}

.copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  color: white;
  font-size: 0.9rem;
}

.copyright a {
  color: var(--accent);
}

/* Mejoras para la textura de papel */
.about,
.testimonials,
.service-card,
.contact-form {
  position: relative;
  background-color: transparent;
}

.about::after,
.testimonials::after,
.service-card::after,
.contact-form::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--paper);
  background-blend-mode: overlay;
  z-index: -1;
  border-radius: inherit;
  opacity: 0.9;
}

[data-theme="dark"] .about::after,
[data-theme="dark"] .testimonials::after,
[data-theme="dark"] .service-card::after,
[data-theme="dark"] .contact-form::after {
  opacity: 0.85;
}

@media (max-width: 992px) {
  .about-content,
  .contact-container {
    flex-direction: column;
  }

  .about-img,
  .about-text,
  .contact-info,
  .contact-form {
    flex: none;
    width: 100%;
  }

  .about-img {
    margin-bottom: 30px;
  }

  .contact-info,
  .contact-form {
    transform: none !important;
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

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

  .btn {
    padding: 10px 20px;
  }

  .menu-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    height: 100vh;
    background: var(--paper-texture);
    background-color: var(--menu-mobile);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
    transition: left 0.5s ease;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
  }

  .nav-links.active {
    left: 0;
  }

  .nav-links li {
    margin: 20px 0;
  }

  .info-item{
    font-size: 0.65rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 30px;
  }

  .footer-column {
    text-align: center;
    margin-bottom: 30px;
  }

  .social-links {
    justify-content: center;
  }

  body.menu-open {
    overflow: hidden;
  }

  .nav-links a:hover {
    color: inherit;
  }

  .theme-toggle:hover {
    transform: inherit;
    box-shadow: inherit;
  }

  .btn:hover {
    transform: inherit;
    box-shadow: inherit;
  }

  .btn:hover::after {
    opacity: inherit;
  }

  .btn-outline:hover {
    background-color: inherit;
    color: inherit;
  }

  .contact-item:hover {
    background-color: inherit;
    --text: inherit;
  }
}

@media (max-width: 576px) {
  .about {
    padding: 1rem;
    text-align: center;
  }
  .hero {
    padding: 120px 0 80px;
  }

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

  .section-title h2 {
    font-size: 2rem;
  }

  .btn-outline {
    margin-left: 0;
    margin-top: 15px;
    display: block;
  }

  .theme-toggle {
    width: 50px;
    height: 50px;
    font-size: 20px;
    bottom: 20px;
    right: 20px;
  }

  .social li {
    position: relative;
    flex-basis: 3rem;
  }
}