:root {
  --color-blue: #2196f3;
  --color-blue-dark: #1769aa;
  --color-white: #fff;
  --color-gray: #f4f8fb;
  --color-dark-gray: #1b2836;
  --primary: var(--color-blue);
  --secondary: #333;
  --radius-main: 14px;
  --shadow-main: 0 2px 12px rgba(33,150,243,0.08);
}

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

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: var(--color-gray);
  color: var(--secondary);
}

header {
  background: linear-gradient(90deg, #2196f3 60%, #21cbf3 100%);
  color: var(--color-white);
  padding: 2.2rem 0 1rem 0;
  box-shadow: var(--shadow-main);
}

.container-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.container-header > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #111 !important;
}

header h1 {
  font-size: 2.2rem;
  margin-bottom: .5rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: #111 !important;
}

header p {
  font-size: 1.1rem;
  font-weight: 400;
  opacity: .96;
  color: #222 !important;
}

.logo {
  width: 100px;
  height: 100px;
  object-fit: contain;
  border-radius: 50%;
  border: 2.5px solid var(--color-white);
  background: var(--color-white);
  box-shadow: 0 2px 8px rgba(33,150,243,0.10);
}

nav {
  background: var(--color-blue-dark);
  padding: 1rem 0;
  display: flex;
  justify-content: center;
  gap: 2.3rem;
  font-size: 1.13rem;
  border-radius: 0 0 var(--radius-main) var(--radius-main);
}

nav a {
  color: var(--color-white);
  text-decoration: none;
  letter-spacing: 1px;
  padding: 0.5rem 1.5rem;
  border-radius: 6px;
  transition: background 0.16s, color 0.16s, box-shadow 0.2s;
  font-weight: 500;
}

nav a:hover, nav a.active {
  background: #21cbf3;
  color: #1769aa;
  box-shadow: 0 2px 8px #21cbf360;
}

main {
  max-width: 1200px;
  margin: auto;
  padding: 2.5rem 1rem 1.5rem;
}

section {
  background: var(--color-white);
  border-radius: var(--radius-main);
  box-shadow: var(--shadow-main);
  margin-bottom: 2.2rem;
  padding: 2.2rem 2rem;
}

.bienvenida {
  text-align: center;
}

.bienvenida p {
  font-size: 1.08rem;
  line-height: 1.7;
  margin-bottom: .9rem;
}

.herramientas-index {
  margin: 2.3rem 0 1rem 0;
  text-align: center;
}

.herramientas-index h3 {
  font-size: 1.2rem;
  color: #1769aa;
  font-weight: 700;
  letter-spacing: 1px;
}

.herramientas-index ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.3rem 2.2rem;
  list-style: none;
  margin: 1.3rem 0 0 0;
  padding: 0;
}

.herramientas-index li {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 0.25rem;
  font-size: 0.97rem;
  background: #e3f2fd;
  border-radius: 11px;
  padding: 0.65rem 0.9rem;
  box-shadow: 0 2px 8px rgba(33,150,243,0.07);
  width: 90px;
  min-height: 94px;
  transition: all 0.2s;
  cursor: pointer;
}

.herramientas-index li:hover {
  box-shadow: 0 8px 24px #2196f3a6;
  background: #bbdefb;
  transform: translateY(-3px) scale(1.06);
}

.icono-herramienta {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.2rem;
}

.icono-herramienta img {
  width: 29px;
  height: 29px;
  object-fit: contain;
}

.herramientas-index span {
  font-size: 0.98rem;
  color: #1769aa;
  font-weight: 500;
  text-align: center;
}

.mensaje-destacado {
  text-align: center;
  margin-top: 2.1rem;
  font-size: 1.13rem;
  background: linear-gradient(90deg, #bbdefb 60%, #b2ebf2 100%);
  padding: 1.2rem 1rem;
  border-radius: 10px;
  color: #1769aa;
  font-weight: bold;
  box-shadow: 0 2px 8px rgba(33,150,243,0.06);
}

.contact-btn,
.main-btn {
  background: linear-gradient(90deg, #2196f3 70%, #21cbf3 100%);
  color: #fff;
  padding: 0.85rem 2.4rem;
  border-radius: 7px;
  border: none;
  font-weight: bold;
  cursor: pointer;
  font-size: 1.1rem;
  box-shadow: 0 1.5px 8px #2196f390;
  transition: all 0.2s;
  text-decoration: none;
  display: inline-block;
}

.contact-btn:hover,
.main-btn:hover {
  background: linear-gradient(90deg, #21cbf3 70%, #2196f3 100%);
  color: #1769aa;
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 6px 20px #21cbf3a8;
}

.main-btn-white {
  background: #fff !important;
  color: #1769aa !important;
  border: 2px solid #1769aa;
  font-size: 1.15rem;
  border-radius: 14px;
  font-weight: bold;
  box-shadow: 0 2px 9px #1976d220;
  padding: 0.95rem 2.5rem;
  transition: all 0.2s;
}

.main-btn-white:hover {
  background: #1769aa !important;
  color: #fff !important;
  border: 2px solid #fff;
  box-shadow: 0 8px 25px #2196f370;
  transform: scale(1.06);
}

.servicio-list,
.proyectos-list {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem 2.5rem;
  justify-content: center;
}

.servicio-card,
.proyecto-card {
  background: #e3f2fd;
  border-radius: 13px;
  box-shadow: 0 2px 8px rgba(33,150,243,0.07);
  padding: 2rem 1rem;
  max-width: 270px;
  text-align: center;
  border: 1.5px solid #bbdefb;
  transition: all 0.2s;
}

.servicio-card:hover,
.proyecto-card:hover {
  box-shadow: 0 8px 24px #2196f3a6;
  background: #bbdefb;
  transform: translateY(-3px) scale(1.04);
}

.servicio-card img,
.proyecto-card img {
  object-fit: contain;
  margin-bottom: 1rem;
}

.servicio-card h3,
.proyecto-card h4 {
  font-size: 1.13rem;
  color: #1769aa;
  font-weight: 600;
}

form {
  background: #fff;
  padding: 2rem;
  border-radius: 9px;
  box-shadow: 0 2px 8px rgba(33,150,243,0.04);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

input,
textarea {
  padding: 0.8rem;
  border: 1px solid #2196f3;
  border-radius: 5px;
  font-size: 1rem;
  background: #f4f8fb;
}

input:focus,
textarea:focus {
  outline: 2px solid #2196f3;
  background: #e3f2fd;
}

button {
  padding: 0.85rem;
  background: linear-gradient(90deg, #2196f3 70%, #21cbf3 100%);
  color: white;
  border: none;
  border-radius: 7px;
  cursor: pointer;
  font-weight: bold;
  font-size: 1.1rem;
  letter-spacing: 0.8px;
  box-shadow: 0 2px 8px #2196f390;
  transition: all 0.2s;
}

button:hover {
  background: linear-gradient(90deg, #21cbf3 70%, #2196f3 100%);
  color: #1769aa;
  box-shadow: 0 6px 20px #21cbf3a8;
}

footer {
  text-align: center;
  background: var(--color-blue-dark);
  color: var(--color-white);
  padding: 1rem;
  margin-top: 2rem;
  border-radius: 0 0 var(--radius-main) var(--radius-main);
  font-size: 1.08rem;
  letter-spacing: 0.7px;
}

/* WhatsApp flotante */
.whatsapp-float {
  position: fixed;
  top: 22px;
  right: 22px;
  width: 38px;
  height: 38px;
  background: #25d366;
  color: #fff;
  border-radius: 50%;
  z-index: 1000;
  box-shadow: 0 2px 7px rgba(37,211,102,0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  text-decoration: none;
}

.whatsapp-float img {
  width: 22px;
  height: 22px;
  filter: invert(0) brightness(1.5);
}

/* Responsive */
@media (max-width: 900px) {
  .servicio-list,
  .proyectos-list,
  .herramientas-index ul {
    flex-direction: column;
    gap: 1.3rem;
    align-items: center;
  }

  .container-header {
    flex-direction: column;
    gap: 1.3rem;
  }
}

@media (max-width: 600px) {
  .whatsapp-float {
    top: 14px;
    right: 14px;
    width: 32px;
    height: 32px;
  }

  .whatsapp-float img {
    width: 17px;
    height: 17px;
  }

  nav {
    flex-direction: column;
    gap: 0.7rem;
    padding: 1rem 0 0.6rem;
  }

  .main-btn-white {
    width: 90%;
    font-size: 1rem;
    padding: 0.85rem 1.2rem;
  }

  .botones-cotizar {
    flex-direction: column;
    gap: 0.7rem;
    align-items: center;
    margin-top: 2.5rem;
  }
}

/* Video presentación */
.video-presentacion {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 2rem;
}

.video-embed-responsive {
  position: relative;
  width: 100%;
  max-width: 700px;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(33,150,243,0.13);
}

.video-embed-responsive iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Redes sociales derecha */
.redes-sociales-derecha {
  position: fixed;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 20px;
  z-index: 1000;
}

.redes-sociales-derecha a {
  font-size: 36px; /* tamaño más grande */
  padding: 18px;
  border-radius: 50%;
  color: white;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.redes-sociales-derecha a:hover {
  transform: scale(1.15);
  box-shadow: 0 6px 14px rgba(0,0,0,0.3);
}

.redes-sociales-derecha .facebook {
  background-color: #3b5998;
}

.redes-sociales-derecha .youtube {
  background-color: #ff0000;
}

.redes-sociales-derecha .linkedin {
  background-color: #0077b5;
}

/* ==== ESTILO GENERAL DE FORMULACIÓN DE PROYECTOS ==== */

.bienvenida {
  text-align: center;
  margin: 40px auto;
  max-width: 800px;
  padding: 20px;
  background-color: var(--color-gray);
  border-radius: var(--radius-main);
  box-shadow: var(--shadow-main);
}

.bienvenida h2 {
  color: var(--primary);
  font-size: 2rem;
  margin-bottom: 10px;
}

.bienvenida p {
  color: var(--color-dark-gray);
  font-size: 1rem;
  line-height: 1.6;
}

.servicio-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  margin: 40px auto;
  max-width: 1100px;
  padding: 0 20px;
}

.servicio-card {
  background-color: var(--color-white);
  padding: 20px;
  border-radius: var(--radius-main);
  box-shadow: var(--shadow-main);
  text-align: center;
  width: 280px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.servicio-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.servicio-card img {
  width: 64px;
  height: 64px;
  margin-bottom: 15px;
}

.servicio-card h3 {
  color: var(--secondary