/*hoja de estilo*/
/* ============================================================
   UNIVERSIDAD DE CONGRESO — Formulario de Preinscripción
   Mobile First | Bootstrap 5 | Variables CSS
   ============================================================ */

/* ------------------------------------------------------------
   1. VARIABLES GLOBALES
   ------------------------------------------------------------ */
:root {
  /* Paleta principal derivada de #50b848 */
  --color-primary: #7ba839;
  --color-primary-dark: #686c3c;
  --color-primary-darker: #2c7027;
  --color-primary-light: #72c96b;
  --color-primary-lighter: #a6dfa2;
  --color-primary-bg: #edf7ec;
  --color-primary-border: #c2e8bf;

  /* Neutros */
  --color-white: #ffffff;
  --color-gray-50: #f3f3f3;
  --color-gray-100: #f0f4f0;
  --color-gray-200: #dde6dd;
  --color-gray-400: #9aad9a;
  --color-gray-600: #5a6b5a;
  --color-gray-800: #2d3b2d;
  --color-text: #2d3b2d;
  --color-text-muted: #5a6b5a;
  --color-danger: #d9534f;
  --color-gris1: #858585;
  --color-gris2: #9e9e9e;

  /* Tipografía */
  --font-family-base: "Open Sans", "Segoe UI", sans-serif;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-xs: 0.75rem;
  --font-size-lg: 1.125rem;
  --font-size-h2: 1.4rem;
  --font-weight-normal: 400;
  --font-weight-semi: 600;
  --font-weight-bold: 700;
  --line-height-base: 1.6;

  /* Espaciado */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Bordes y sombras */
  --border-radius-sm: 0;
  --border-radius-md: 0;
  --border-radius-lg: 0;
  --border-radius-pill: 0;
  --border-color: #dde6dd;
  --border-focus: #50b848;
  --shadow-sm: 0 1px 4px rgba(80, 184, 72, 0.08);
  --shadow-md: 0 4px 16px rgba(80, 184, 72, 0.12);
  --shadow-lg: 0 8px 32px rgba(80, 184, 72, 0.16);

  /* Transiciones */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;

  /* Layout */
  --header-height: auto;
  --form-max-width: 640px;
  --section-padding: var(--spacing-lg);
}

/* ------------------------------------------------------------
   2. RESET / BASE
   ------------------------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-gray-100);
  line-height: var(--line-height-base);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Importar Open Sans desde Google Fonts */
@import url("https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,300..800;1,300..800&display=swap");

/* ------------------------------------------------------------
   3. HEADER
   ------------------------------------------------------------ */
header {
  width: 100%;
  border-bottom: 3px solid var(--color-primary);
}

header img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
}

/* ------------------------------------------------------------
   4. MAIN
   ------------------------------------------------------------ */
main {
  flex: 1;
  width: 100%;
  max-width: var(--form-max-width);
  margin: var(--spacing-lg) auto;
  padding: 0 var(--spacing-md);
}

/* ------------------------------------------------------------
   5. SECCIÓN INTRO
   ------------------------------------------------------------ */
main > section:first-of-type {
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-primary);
}

main > section:first-of-type h2 {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
}

main > section:first-of-type p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-sm);
}

main > section:first-of-type p:last-of-type {
  font-weight: var(--font-weight-semi);
  color: var(--color-primary-dark);
  font-size: var(--font-size-base);
  margin-bottom: 0;
}

main > section:first-of-type hr {
  border: none;
  border-top: 2px solid var(--color-primary-border);
  margin-top: var(--spacing-sm);
}

/* ------------------------------------------------------------
   6. SECCIÓN FORMULARIO
   ------------------------------------------------------------ */
main > section:last-of-type {
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

/* ------------------------------------------------------------
   7. FORMULARIO — ESTRUCTURA GENERAL
   ------------------------------------------------------------ */
#preinscripcion {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* Grupos de campo: label + input agrupados */
#preinscripcion label {
  display: block;
  font-weight: var(--font-weight-semi);
  font-size: var(--font-size-sm);
  color: var(--color-gray-800);
  margin-bottom: var(--spacing-xs);
}

/* Asterisco obligatorio */
.ast {
  color: var(--color-danger);
  margin-left: 2px;
  font-weight: var(--font-weight-bold);
}

/* ------------------------------------------------------------
   8. INPUTS, SELECTS, FILE
   ------------------------------------------------------------ */
#preinscripcion input[type="text"],
#preinscripcion input[type="email"],
#preinscripcion select {
  width: 100%;
  padding: 0.6rem 0.85rem;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-white);
  border: 1.5px solid var(--border-color);
  border-radius: var(--border-radius-md);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
  outline: none;
}

/* Select con flecha personalizada */
#preinscripcion select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2350b848' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  padding-right: 2.2rem;
  cursor: pointer;
}

/* Focus state */
#preinscripcion input[type="text"]:focus,
#preinscripcion input[type="email"]:focus,
#preinscripcion select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(80, 184, 72, 0.18);
}

/* Placeholder */
#preinscripcion input::placeholder {
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
}

/* File input */
#archivo {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  background-color: var(--color-gray-50);
  border: 1.5px dashed var(--color-primary-border);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    background-color var(--transition-fast);
}

#archivo:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-bg);
}

/* ------------------------------------------------------------
   9. DIVS INTERNOS — contenedores de campos
   ------------------------------------------------------------ */
#contenedorPre,
#contenedorCursado,
#contenedorProcedencia {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

/* Div de Código + Teléfono — mobile: columna */
#div-telefono {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  background-color: var(--color-gray-50);
  border: 1px solid var(--color-primary-border);
  padding: var(--spacing-md);
}

/* ------------------------------------------------------------
   10. TEXTOS SECUNDARIOS
   ------------------------------------------------------------ */
.smalltxt {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: calc(var(--spacing-xs) * -1);
  margin-bottom: var(--spacing-xs);
  font-style: italic;
}

/* Párrafo de advertencia DNI */
#preinscripcion > p {
  font-size: var(--font-size-xs);
  color: var(--color-gray-600);
  background-color: var(--color-primary-bg);
  border-left: 3px solid var(--color-primary-light);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  margin-top: calc(var(--spacing-xs) * -1);
}

/* ------------------------------------------------------------
   11. BOTÓN ENVIAR
   ------------------------------------------------------------ */
#preinscripcion button[type="submit"] {
  width: 100%;
  padding: 0.8rem var(--spacing-xl);
  font-family: var(--font-family-base);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  background-color: var(--color-primary);
  border: none;
  border-radius: var(--border-radius-pill);
  cursor: pointer;
  letter-spacing: 0.03em;
  box-shadow: 0 4px 14px rgba(80, 184, 72, 0.35);
  transition:
    background-color var(--transition-base),
    transform var(--transition-fast),
    box-shadow var(--transition-base);
  margin-top: var(--spacing-sm);
}

#preinscripcion button[type="submit"]:hover {
  background-color: var(--color-primary-dark);
  box-shadow: 0 6px 20px rgba(80, 184, 72, 0.45);
  transform: translateY(-1px);
}

#preinscripcion button[type="submit"]:active {
  background-color: var(--color-primary-darker);
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* ------------------------------------------------------------
   12. FOOTER
   ------------------------------------------------------------ */
footer {
  background-color: var(--color-gris1);
  color: var(--color-gray-50);
  text-align: center;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-sm);
  margin-top: auto;
}

footer p {
  margin-bottom: var(--spacing-xs);
}

footer p:first-child {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-base);
  color: var(--color-white);
}

footer p:last-child {
  font-size: var(--font-size-xs);
  color: inherit;
}

footer i {
  margin-right: 2px;
}

/* ------------------------------------------------------------
   13. ESTADOS DE VALIDACIÓN (Bootstrap override)
   ------------------------------------------------------------ */
.is-valid,
input:valid:not(:placeholder-shown) {
  border-color: var(--color-primary) !important;
}

.is-invalid {
  border-color: var(--color-danger) !important;
  box-shadow: 0 0 0 3px rgba(217, 83, 79, 0.15) !important;
}

/* ------------------------------------------------------------
   14. BOOTSTRAP OVERRIDES — color primario
   ------------------------------------------------------------ */
.btn-primary {
  --bs-btn-bg: var(--color-primary);
  --bs-btn-border-color: var(--color-primary);
  --bs-btn-hover-bg: var(--color-primary-dark);
  --bs-btn-active-bg: var(--color-primary-darker);
}

/* ------------------------------------------------------------
   15. RESPONSIVE — Tablet / Desktop  (≥ 576px)
   ------------------------------------------------------------ */
@media (min-width: 576px) {
  :root {
    --font-size-h2: 1.6rem;
    --section-padding: var(--spacing-xl);
  }

  main {
    margin: var(--spacing-xl) auto;
    padding: 0 var(--spacing-lg);
  }

  main > section:first-of-type,
  main > section:last-of-type {
    padding: var(--spacing-xl);
  }

  /* Código de área + Teléfono en fila: cod angosto, tel flexible */
  #div-telefono {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--spacing-lg);
  }

  #div-telefono > div:first-child {
    flex: 0 0 130px;
  }

  #div-telefono > div:last-child {
    flex: 1;
  }
}

@media (min-width: 768px) {
  :root {
    --font-size-h2: 1.75rem;
  }

  #preinscripcion button[type="submit"] {
    width: auto;
    min-width: 200px;
    align-self: flex-end;
  }
}

/*----------------ARROW DOWN*/
.arrow-container {
  position: absolute;
  top: 35%; 
  left: 10%; 
  transform: translateX(-50%);
  color: var(--color-gray-100);
}
.scroll-icon--NOOOO {
  background: rgba(255, 255, 255, 0.15);
 /* box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);*/
  backdrop-filter: blur(10px); 
  -webkit-backdrop-filter: blur(10px); /* soporte Safari del efecto */

  padding: 1rem;
}

.scroll-icon i {
  font-size: 2rem;
  color: tomato;
  display: inline-block; /* no quitar este estilo!!! */
  animation: bounce 1.5s infinite;
}


@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-15px);
  }
  60% {
    transform: translateY(-8px);
  }
}
#infosede {
  border-bottom: solid 1px var(--color-gris2);
}
a{
  color:var(--color-primary);
  cursor: pointer;
  text-decoration: none;
}
a:hover{
  transform: scale(1.2);
}
.errores{
  padding: 1em;
  border-left: solid 4px var(--color-danger);
  background-color: inherit;
}