:root {
  --azul-claro: #e9f0f6;
  --azul-oscuro: #111a23;
  --blanco: #FFFFFF;
  --gris-claro: #CCCCCC;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}
html, body {
  width: 100%;
  overflow-x: hidden;
  background-color: linear-gradient(to bottom, #111a23, #111111);
  background-attachment: fixed;
}

body {
  color: #fff;
}

/* VIDEO DE FONDO */

.video-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
}

.video-bg video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0);
  z-index: -1;
}
.glow {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, #111a23, #111);
  pointer-events: none;
}

/* =========================
   HEADER
========================= */
header {
  background-color: #11111100;
  color: var(--blanco);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: fixed;
  z-index: 100;
}

.logo {
    background: #CCCCCC;
    border-radius: 50%;
    padding: .2rem;
  height: 60px;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
}



nav a {
  text-decoration: none;
  color: var(--verde-oscuro);
  font-weight: bold;
  transition: color 0.3s;
}

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

/* CONTENEDOR */

.registro-container {
  min-height: 100vh;
  position: relative;
}

.sticky {
  position: sticky;
  top: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

/* CARD */

.registro-card {
  width: 100%;
  max-width: 1200px;
  background: rgba(255,255,255,0.05);
  padding: 50px 40px;
  border-radius: 20px;
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 0 40px rgba(0,0,0,0.6);

  /* ANIMACIÓN */
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

/* HEADER */

.registro-header {
  text-align: center;
  margin-bottom: 40px;
}

.registro-header h1 {
  font-size: 1.5rem;
  margin-bottom: 10px;
  letter-spacing: 1px;
}

.registro-header p {
  font-size: 0.85rem;
  color: #aaa;
}

/* FORM */

.registro-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
    width: 100%;
  display: flex;
  flex-direction: column;
}
.grup-inputs{
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}
.form-group label {
  font-size: 0.8rem;
  margin-bottom: 8px;
  color: #ccc;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group select {
  padding: 14px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgb(255, 255, 255);
  font-size: 0.9rem;
  transition: 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: #ffffff;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* CHECKBOX */

.checkbox-group {
  flex-direction: row;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: #aaa;
}

.checkbox-group input {
  width: 16px;
  height: 16px;
}

/* RESPONSIVE */

@media (max-width: 600px) {

  .registro-card {
    padding: 35px 25px;
  }

  .registro-header h1 {
    font-size: 1.5rem;
  }

}
/* =========================
   BOTÓN
========================= */

.btn-principal {
  display: inline-block;
  background: var(--blanco);
  color: var(--azul-oscuro);
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: bold;
  text-decoration: none;
  margin-top: 1.5rem;
  transition: all 0.3s ease;
  text-align: center;
}

.btn-principal:hover {
  background: #9e9e9e;
  transform: translateY(-3px);
}
@media screen and (max-width: 1200px) {
    .registro-header h1 {
  font-size: 1rem;
  margin-bottom: 10px;
  letter-spacing: 1px;
}

.registro-header p {
  font-size: 0.75rem;
  color: #aaa;
}
    .grup-inputs{
        display: flex;
        flex-direction: column;
}
.form-group label {
  font-size: 0.7rem;
  margin-bottom: 5px;
  color: #ccc;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group select {
  padding: 10px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgb(255, 255, 255);
  font-size: 0.7rem;
  transition: 0.3s ease;
}
.btn-principal {
  display: inline-block;
  background: var(--azul-oscuro);
  color: var(--blanco);
  padding: 10px 25px;
  border-radius: 8px;
  font-weight: bold;
  text-decoration: none;
  margin-top: 1.5rem;
  transition: all 0.3s ease;
  text-align: center;
  border: .1rem solid var(--blanco);
}

.btn-principal:hover {
  background: #9e9e9e;
  transform: translateY(-3px);
}
}