:root {
  --blue: #0b4fd8;
  --red: #ef233c;
  --dark: #111827;
  --text: #374151;
  --light: #f7f9fc;
  --white: #ffffff;
  --border: #e5e7eb;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, "Segoe UI", Arial, Helvetica, sans-serif;
  color: var(--text);
  background: #f3f5f9;
  line-height: 1.6;
}

header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 18px rgba(17, 24, 39, 0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-logo {
  display: block;
  width: auto;
  height: 52px;
}

.logo-link {
  margin: 0;
  padding: 0;
}

nav a {
  color: var(--dark);
  text-decoration: none;
  margin-left: 24px;
  font-weight: 600;
  padding: 8px 4px;
}

nav a:hover {
  color: var(--red);
}

#language-toggle {
  margin-left: 20px;
  padding: 9px 14px;
  color: var(--white);
  background: var(--blue);
  border: 0;
  border-radius: 10px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

#language-toggle:hover,
#language-toggle:focus-visible {
  background: var(--red);
}

.language-selector {
  position: relative;
  display: inline-block;
}

.language-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 180px;
  padding: 8px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(17, 24, 39, 0.14);
}

.language-menu button {
  display: block;
  width: 100%;
  padding: 10px 12px;
  color: var(--dark);
  background: transparent;
  border: 0;
  border-radius: 8px;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.language-menu button:hover,
.language-menu button:focus-visible,
.language-menu button[aria-current="true"] {
  color: var(--blue);
  background: #eef4ff;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 72px 0;
}

#inicio {
  min-height: 470px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin-top: 32px;
  padding: 64px;
  color: var(--white);
  background: linear-gradient(125deg, var(--blue) 0%, var(--blue) 52%, var(--red) 100%);
  border-radius: 28px;
  box-shadow: 0 18px 50px rgba(11, 79, 216, 0.18);
}

#inicio h1 {
  max-width: 750px;
  font-size: clamp(2.6rem, 6vw, 5rem);
  line-height: 1.05;
  color: var(--white);
  margin-bottom: 24px;
}

#inicio h1::after {
  content: ".";
  color: var(--white);
}

#inicio p {
  max-width: 680px;
  font-size: 1.15rem;
  margin-bottom: 12px;
  color: rgba(255, 255, 255, 0.92);
}

h2 {
  font-size: 2rem;
  color: var(--dark);
  margin-bottom: 24px;
}

#nosotros {
  margin-top: 32px;
  padding: 52px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: 0 8px 30px rgba(17, 24, 39, 0.05);
}

#servicios {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  border-top: 0;
}

#servicios > h2 {
  grid-column: 1 / -1;
}

article {
  background: var(--white);
  padding: 28px;
  border-radius: 18px;
  border: 1px solid var(--border);
  box-shadow: 0 8px 30px rgba(17, 24, 39, 0.07);
  border-top: 4px solid var(--blue);
}

article h3 {
  color: var(--blue);
  margin-bottom: 10px;
  font-size: 1.25rem;
}

#contacto {
  margin-bottom: 72px;
  padding: 44px 52px;
  background: var(--white);
  border: 1px solid var(--border);
  border-left: 5px solid var(--red);
  border-radius: 18px;
}

#contacto a {
  color: var(--blue);
  font-weight: 700;
  text-decoration: none;
}

footer {
  background: var(--blue);
  color: var(--white);
  text-align: center;
  padding: 28px 20px;
  margin-top: 40px;
}

@media (max-width: 760px) {
  nav {
    flex-direction: column;
    gap: 14px;
  }

  nav > div:last-child {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    row-gap: 8px;
  }

  nav a {
    margin: 0 8px;
  }

  #language-toggle {
    margin: 0 8px;
  }

  #servicios {
    grid-template-columns: 1fr;
  }

  #inicio {
    min-height: 430px;
    padding: 44px 24px;
    border-radius: 20px;
  }

  #nosotros,
  #contacto {
    padding: 36px 24px;
  }

  section {
    padding: 52px 0;
  }
}