/* ============ VARIABLES / DESIGN TOKENS ============ */
:root {
  --color-primario: #2e5395;
  --color-primario-claro: #4f7cc7;
  --color-acento: #ffb703;
  --color-texto: #1f2937;
  --color-texto-suave: #5b6472;
  --color-fondo: #ffffff;
  --color-fondo-alterno: #f4f6fb;
  --color-borde: #e2e6ee;
  --fuente-titulos: 'Poppins', sans-serif;
  --fuente-textos: 'Inter', sans-serif;
  --radio: 12px;
  --sombra: 0 10px 30px rgba(31, 41, 55, 0.08);
  --transicion: all 0.3s ease;
}

[data-theme="oscuro"] {
  --color-texto: #f1f3f9;
  --color-texto-suave: #b7bfcf;
  --color-fondo: #10141c;
  --color-fondo-alterno: #171c27;
  --color-borde: #2a3140;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--fuente-textos);
  color: var(--color-texto);
  background-color: var(--color-fondo);
  transition: var(--transicion);
  line-height: 1.6;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

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

.titulo-seccion {
  font-family: var(--fuente-titulos);
  font-size: 2rem;
  text-align: center;
  color: var(--color-primario);
}

.subtitulo-seccion {
  text-align: center;
  color: var(--color-texto-suave);
  margin-bottom: 40px;
}

/* ============ BOTONES ============ */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: var(--radio);
  font-weight: 600;
  transition: var(--transicion);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn--primario {
  background-color: var(--color-primario);
  color: #fff;
}

.btn--primario:hover {
  background-color: var(--color-primario-claro);
  transform: translateY(-3px);
}

.btn--secundario {
  border-color: var(--color-primario);
  color: var(--color-primario);
}

.btn--secundario:hover {
  background-color: var(--color-primario);
  color: #fff;
  transform: translateY(-3px);
}

.btn--ancho { width: 100%; }

/* ============ HEADER / NAV ============ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-fondo);
  border-bottom: 1px solid var(--color-borde);
  backdrop-filter: blur(8px);
}

.header__contenedor {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
}

.logo {
  font-family: var(--fuente-titulos);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-texto);
}

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

.nav__lista {
  display: flex;
  gap: 32px;
}

.nav__enlace {
  font-weight: 500;
  position: relative;
  padding-bottom: 4px;
}

.nav__enlace::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primario);
  transition: var(--transicion);
}

.nav__enlace:hover::after { width: 100%; }

.header__acciones {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-icono {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
}

.btn-menu {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
}

.btn-menu span {
  width: 26px;
  height: 3px;
  background-color: var(--color-texto);
  border-radius: 2px;
}

/* ============ HERO ============ */
.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  align-content: center;
  gap: 40px;
  padding: 90px 24px;
  min-height: 80vh;
}

.hero__saludo {
  color: var(--color-primario);
  font-weight: 600;
  margin-bottom: 8px;
}

.hero__nombre {
  font-family: var(--fuente-titulos);
  font-size: 3rem;
  line-height: 1.1;
  margin-bottom: 6px;
}

.hero__rol {
  font-family: var(--fuente-titulos);
  font-size: 1.4rem;
  color: var(--color-texto-suave);
  font-weight: 600;
  margin-bottom: 20px;
}

.hero__bio {
  color: var(--color-texto-suave);
  max-width: 480px;
  margin-bottom: 30px;
}

.hero__botones { display: flex; gap: 16px; flex-wrap: wrap; }

.hero__imagen { display: flex; justify-content: center; }

.hero__foto {
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primario), var(--color-acento));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--fuente-titulos);
  font-size: 3.5rem;
  font-weight: 700;
  box-shadow: var(--sombra);
}

/* ============ HABILIDADES ============ */
.habilidades { padding: 80px 24px; }

.habilidades__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.skill {
  background-color: var(--color-fondo-alterno);
  padding: 20px 24px;
  border-radius: var(--radio);
  transition: var(--transicion);
}

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

.skill__encabezado {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  margin-bottom: 10px;
}

.skill__porcentaje { color: var(--color-primario); }

.skill__barra {
  width: 100%;
  height: 10px;
  background-color: var(--color-borde);
  border-radius: 20px;
  overflow: hidden;
}

.skill__relleno {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primario), var(--color-primario-claro));
  border-radius: 20px;
  transition: width 1.2s ease;
}

/* ============ CONTACTO ============ */
.contacto { padding: 80px 24px 100px; }

.contacto__grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 50px;
  align-items: start;
}

.contacto__info p { margin-bottom: 16px; color: var(--color-texto-suave); }

.contacto__redes { display: flex; gap: 14px; margin-top: 20px; }

.contacto__redes a {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background-color: var(--color-fondo-alterno);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-primario);
  transition: var(--transicion);
}

.contacto__redes a:hover {
  background-color: var(--color-primario);
  color: #fff;
  transform: translateY(-3px);
}

.formulario {
  background-color: var(--color-fondo-alterno);
  padding: 30px;
  border-radius: var(--radio);
}

.campo { margin-bottom: 18px; display: flex; flex-direction: column; gap: 6px; }

.campo label { font-weight: 600; font-size: 0.9rem; }

.campo input, .campo textarea {
  padding: 12px 14px;
  border: 1px solid var(--color-borde);
  border-radius: 8px;
  font-family: var(--fuente-textos);
  background-color: var(--color-fondo);
  color: var(--color-texto);
  resize: vertical;
}

.campo input:focus, .campo textarea:focus {
  outline: none;
  border-color: var(--color-primario);
}

.campo.invalido input, .campo.invalido textarea { border-color: #d64545; }

.error {
  color: #d64545;
  font-size: 0.8rem;
  min-height: 16px;
}

.confirmacion {
  margin-top: 14px;
  font-weight: 600;
  color: #2e7d32;
  text-align: center;
}

/* ============ FOOTER ============ */
.footer {
  text-align: center;
  padding: 24px;
  background-color: var(--color-fondo-alterno);
  color: var(--color-texto-suave);
  font-size: 0.9rem;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; text-align: center; padding-top: 60px; }
  .hero__bio { margin-left: auto; margin-right: auto; }
  .hero__botones { justify-content: center; }
  .hero__imagen { order: -1; }
  .habilidades__grid { grid-template-columns: 1fr; }
  .contacto__grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .btn-menu { display: flex; }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-fondo);
    border-bottom: 1px solid var(--color-borde);
    max-height: 0;
    overflow: hidden;
    transition: var(--transicion);
  }

  .nav.activo { max-height: 300px; }

  .nav__lista {
    flex-direction: column;
    padding: 20px 24px;
    gap: 18px;
  }
}