/* ============================================================
   ÁGORA ACADEMIA — Ejercicio 1: Formulario de Inscripción
   Autor: R4dyr
   Fuentes: Poppins (títulos) · Inter (texto)
   ============================================================ */


/* ── 1. VARIABLES ────────────────────────────────────────── */
:root {
  /* Paleta Ágora Academia */
  --c-blue:       #1D4ED8;   /* azul principal */
  --c-sky:        #38BDF8;   /* azul claro acento */
  --c-dark:       #0F172A;   /* casi negro */
  --c-light:      #F8FAFC;   /* fondo claro */
  --c-gray:       #64748B;   /* gris texto */
  --c-border:     #E2E8F0;   /* borde suave */
  --c-white:      #ffffff;
  --c-error:      #EF4444;
  --c-blue-hover: #1e40af;

  /* Tipografías */
  --font-title: 'Poppins', sans-serif;
  --font-body:  'Inter', sans-serif;

  /* Bordes redondeados */
  --r-sm:  6px;
  --r-md: 12px;
  --r-lg: 20px;

  /* Sombras */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, .08);
  --shadow-md: 0 4px 20px rgba(15, 23, 42, .10);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, .16);

  /* Transición global */
  --t: .25s ease;

  /* Ancho máximo del contenido */
  --max-w: 1100px;
}


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

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

body {
  font-family: var(--font-body);
  background-color: var(--c-light);
  color: var(--c-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a          { text-decoration: none; color: inherit; }
ul, ol     { list-style: none; }
img        { display: block; max-width: 100%; }
address    { font-style: normal; }
button     { font-family: inherit; }


/* ── 3. HEADER ───────────────────────────────────────────── */
.header {
  background: var(--c-white);
  border-bottom: 3px solid var(--c-blue);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  max-width: var(--max-w);
  margin:  0 auto;
  padding: 1rem 2rem;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* Marca */
.header__brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header__logo {
  height: 60px;
  width:  auto;
  object-fit: contain;
}

.header__brand-text {
  display: flex;
  flex-direction: column;
}

.header__name {
  font-family: var(--font-title);
  font-size:   1.4rem;
  font-weight: 700;
  color:       var(--c-dark);
  letter-spacing: .03em;
}

.header__slogan {
  font-size:  .8rem;
  color:      var(--c-gray);
  font-style: italic;
  margin-top: .1rem;
}

/* Contacto cabecera */
.header__contact {
  display:        flex;
  flex-direction: column;
  align-items:    flex-end;
  gap: .4rem;
}

.header__contact-item {
  display:     flex;
  align-items: center;
  gap: .45rem;
  font-size:   .875rem;
  color:       var(--c-gray);
  transition:  color var(--t);
}

.header__contact-item i {
  color:     var(--c-blue);
  font-size: .8rem;
  width:     14px;
  text-align: center;
}

.header__contact-item:hover { color: var(--c-blue); }


/* ── 4. NAVEGACIÓN ───────────────────────────────────────── */
.nav {
  background: var(--c-dark);
  position:   sticky;
  top:        0;
  z-index:    100;
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
}

.nav__inner {
  max-width: var(--max-w);
  margin:    0 auto;
  padding:   0 2rem;
}

.nav__list {
  display:     flex;
  align-items: center;
  justify-content: space-between;
}

.nav__link {
  display:     block;
  padding:     .9rem 1.5rem;

  font-family: var(--font-title);
  font-size:   .82rem;
  font-weight: 500;
  color:       rgba(255,255,255,.65);
  letter-spacing: .07em;
  text-transform: uppercase;

  position:   relative;
  transition: color var(--t), background var(--t);
}

/* Línea inferior animada */
.nav__link::after {
  content:    '';
  position:   absolute;
  bottom:     0;
  left:       50%;
  transform:  translateX(-50%);
  width:      0;
  height:     3px;
  background: var(--c-sky);
  border-radius: 3px 3px 0 0;
  transition: width var(--t);
}

.nav__link:hover {
  color:      var(--c-white);
  background: rgba(255,255,255,.06);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 65%;
}

.nav__link--active {
  color: var(--c-sky);
}


/* ── 5. SECCIÓN HERO ─────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--c-dark) 0%, #1e3a8a 100%);
  position:   relative;
  overflow:   hidden;
  padding:    3.5rem 2rem 2.5rem;
  text-align: center;
}

/* Círculos decorativos */
.hero::before,
.hero::after {
  content:       '';
  position:      absolute;
  border-radius: 50%;
  pointer-events: none;
}

.hero::before {
  width:      420px;
  height:     420px;
  top:        -50%;
  right:      -8%;
  background: rgba(56, 189, 248, .07);
}

.hero::after {
  width:      280px;
  height:     280px;
  bottom:     -65%;
  left:       -4%;
  background: rgba(29, 78, 216, .15);
}

.hero__inner {
  position: relative;
  z-index:  1;
}

.hero__title {
  font-family:    var(--font-title);
  font-size:      2.2rem;
  font-weight:    700;
  color:          var(--c-white);
  letter-spacing: .06em;
  text-transform: uppercase;
}

/* Línea decorativa bajo el título */
.hero__title::after {
  content:       '';
  display:       block;
  width:         70px;
  height:        4px;
  background:    var(--c-sky);
  border-radius: 2px;
  margin:        .7rem auto 0;
}

.hero__subtitle {
  margin-top: .8rem;
  font-size:  1rem;
  color:      rgba(255,255,255,.65);
}


/* ── 6. SECCIÓN FORMULARIO ───────────────────────────────── */
.form-section {
  max-width: 760px;
  margin:    0 auto;
  padding:   2.5rem 1.5rem 3.5rem;
}

/* Tarjeta contenedora */
.form-card {
  background:    var(--c-white);
  border-radius: var(--r-lg);
  box-shadow:    var(--shadow-lg);
  overflow:      hidden;
}

/* Cabecera de la tarjeta */
.form-card__header {
  background: linear-gradient(135deg, var(--c-blue) 0%, #2563eb 100%);
  padding:    1.8rem 2rem;
  text-align: center;
  color:      var(--c-white);
  display: flex;
  justify-content: center;
  align-items: center;
}

.form-card__icon {
  display:     block;
  font-size:   2rem;
  margin-right: .5rem;
}

.form-card__title {
  font-family:    var(--font-title);
  font-size:      1.2rem;
  font-weight:    600;
  letter-spacing: .05em;
  text-transform: uppercase;
}


/* ── 7. FORMULARIO ───────────────────────────────────────── */
.form {
  padding: 2rem 2.5rem 2.5rem;
}

/* Fila de dos columnas */
.form__row {
  display: flex;
  gap:     1.2rem;
}

.form__row .form__group {
  flex: 1;
}

/* Grupo de campo */
.form__group {
  margin-bottom: 1.4rem;
}

/* Etiqueta */
.form__label {
  display:      block;
  margin-bottom: .4rem;
  font-size:    .85rem;
  font-weight:  500;
  color:        var(--c-dark);
}

.form__required {
  color:       var(--c-error);
  margin-left: 2px;
}

/* Contenedor input con icono */
.form__input-wrapper {
  position: relative;
  display:  flex;
  align-items: center;
}

.form__input-icon {
  position:       absolute;
  left:           .9rem;
  z-index:        1;
  color:          var(--c-gray);
  font-size:      .82rem;
  pointer-events: none;
  transition:     color var(--t);
}

/* Input genérico */
.form__input {
  width:       100%;
  padding:     .75rem .9rem .75rem 2.5rem;

  border:        1.5px solid var(--c-border);
  border-radius: var(--r-sm);
  background:    var(--c-light);

  font-family: var(--font-body);
  font-size:   .9rem;
  color:       var(--c-dark);

  -webkit-appearance: none;
  appearance:         none;
  outline:            none;
  transition:  border-color var(--t), box-shadow var(--t), background var(--t);
}

.form__input::placeholder {
  color: #94A3B8;
}

/* Pseudoclase :hover en input */
.form__input:hover {
  border-color: #94A3B8;
}

/* Pseudoclase :focus en input */
.form__input:focus {
  border-color: var(--c-blue);
  box-shadow:   0 0 0 3px rgba(29, 78, 216, .14);
  background:   var(--c-white);
}

/* El icono cambia de color cuando el input tiene foco */
.form__input-wrapper:focus-within .form__input-icon {
  color: var(--c-blue);
}

/* Select: flecha personalizada con Font Awesome */
.form__input-wrapper--select::after {
  content:        '\f078';   /* chevron-down FA */
  font-family:    'Font Awesome 6 Free';
  font-weight:    900;
  position:       absolute;
  right:          .9rem;
  color:          var(--c-gray);
  font-size:      .72rem;
  pointer-events: none;
  transition:     color var(--t);
}

.form__input-wrapper--select:focus-within::after {
  color: var(--c-blue);
}

.form__select {
  cursor:        pointer;
  padding-right: 2.4rem;
}

/* ── Checkbox ── */
.form__group--checkbox {
  display:     flex;
  align-items: flex-start;
  gap:         .7rem;
  margin-bottom: 1.8rem;

  padding:       .9rem 1.1rem;
  border:        1.5px solid var(--c-border);
  border-radius: var(--r-sm);
  background:    var(--c-light);
  transition:    border-color var(--t), background var(--t);
}

.form__group--checkbox:hover {
  border-color: var(--c-blue);
  background:   #eff6ff;
}

.form__checkbox {
  width:    18px;
  height:   18px;
  min-width: 18px;
  margin-top: 3px;
  accent-color: var(--c-blue);
  cursor:   pointer;
}

.form__label-checkbox {
  font-size:   .875rem;
  color:       var(--c-gray);
  cursor:      pointer;
  line-height: 1.55;
}

.form__link {
  color:           var(--c-blue);
  font-weight:     500;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition:      color var(--t);
}

.form__link:hover {
  color: var(--c-sky);
}

/* ── Botón enviar ── */
.form__btn {
  display:         flex;
  align-items:     center;
  justify-content: center;
  gap: .55rem;

  width:   100%;
  padding: .95rem 2rem;

  background:    linear-gradient(135deg, var(--c-blue) 0%, #2563eb 100%);
  color:         var(--c-white);
  border:        none;
  border-radius: var(--r-sm);
  cursor:        pointer;

  font-family:    var(--font-title);
  font-size:      .95rem;
  font-weight:    600;
  letter-spacing: .07em;
  text-transform: uppercase;

  box-shadow: 0 4px 15px rgba(29, 78, 216, .32);
  transition: background var(--t), transform var(--t), box-shadow var(--t);
}

/* Pseudoclase :hover en botón */
.form__btn:hover {
  background:  linear-gradient(135deg, var(--c-blue-hover) 0%, var(--c-blue) 100%);
  transform:   translateY(-2px);
  box-shadow:  0 7px 22px rgba(29, 78, 216, .42);
}

/* Pseudoclase :active en botón */
.form__btn:active {
  transform:  translateY(0);
  box-shadow: 0 2px 8px rgba(29, 78, 216, .28);
}

/* Pseudoclase :focus en botón */
.form__btn:focus-visible {
  outline:        3px solid var(--c-sky);
  outline-offset: 3px;
}


/* ── 8. FOOTER ───────────────────────────────────────────── */
.footer {
  background:  var(--c-dark);
  color:       rgba(255,255,255,.65);
  margin-top:  1rem;
}

.footer__inner {
  max-width: var(--max-w);
  margin:    0 auto;
  padding:   3rem 2rem 2.5rem;

  display: flex;
  gap:     2.5rem;
}

.footer__col {
  flex: 1;
}

/* Títulos de columna */
.footer__title {
  font-family:    var(--font-title);
  font-size:      .88rem;
  font-weight:    600;
  color:          var(--c-white);
  letter-spacing: .05em;
  text-transform: uppercase;
  margin-bottom:  1.1rem;
  padding-bottom: .55rem;
  border-bottom:  2px solid var(--c-blue);
  display:        inline-block;
}

/* Descripción primera columna */
.footer__text {
  font-size:   .875rem;
  line-height: 1.75;
  margin-bottom: 1.2rem;
}

/* Redes sociales */
.footer__social {
  display: flex;
  gap:     .5rem;
}

.footer__social-link {
  width:  34px;
  height: 34px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,.18);

  display:         flex;
  align-items:     center;
  justify-content: center;

  font-size: .8rem;
  color:     rgba(255,255,255,.6);

  transition: background var(--t), border-color var(--t),
              color var(--t), transform var(--t);
}

/* :hover en redes sociales */
.footer__social-link:hover {
  background:   var(--c-blue);
  border-color: var(--c-blue);
  color:        var(--c-white);
  transform:    translateY(-3px);
}

/* Lista de enlaces */
.footer__list {
  display:        flex;
  flex-direction: column;
  gap:            .5rem;
}

.footer__list li {
  font-size: .875rem;
}

.footer__link {
  color:      rgba(255,255,255,.6);
  transition: color var(--t), padding-left var(--t);
  display:    inline-block;
}

/* :hover en enlaces del footer */
.footer__link:hover {
  color:        var(--c-sky);
  padding-left: 6px;
}

/* Dirección / información de contacto */
.footer__address {
  display:        flex;
  flex-direction: column;
  gap:            .7rem;
}

.footer__address p {
  display:     flex;
  align-items: flex-start;
  gap:         .6rem;
  font-size:   .875rem;
  line-height: 1.55;
}

.footer__address i {
  color:     var(--c-sky);
  min-width: 14px;
  margin-top: 3px;
  text-align: center;
}

/* Horario */
.footer__schedule-list {
  display:        flex;
  flex-direction: column;
  gap:            .5rem;
}

.footer__schedule-item {
  display:         flex;
  justify-content: space-between;
  font-size:       .875rem;
  padding-bottom:  .45rem;
  border-bottom:   1px solid rgba(255,255,255,.07);
}

.footer__schedule-item:last-child {
  border-bottom: none;
}

/* Copyright */
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  text-align: center;
  padding:    1.2rem 2rem;
  font-size:  .78rem;
  color:      rgba(255,255,255,.35);
}


/* ── 9. RESPONSIVE ───────────────────────────────────────── */

/* Tablet → 768px */
@media (max-width: 768px) {

  /* Header en columna */
  .header__inner {
    flex-direction: column;
    align-items:    flex-start;
    gap:            .7rem;
  }

  .header__contact {
    align-items: flex-start;
  }

  /* Menú centrado y con salto de línea */
  .nav__list {
    flex-wrap:       wrap;
    justify-content: center;
  }

  .nav__link {
    padding:   .7rem 1rem;
    font-size: .76rem;
  }

  /* Hero más pequeño */
  .hero__title {
    font-size: 1.6rem;
  }

  /* Form en una columna */
  .form-section {
    padding: 1.5rem 1rem 2.5rem;
  }

  .form {
    padding: 1.5rem;
  }

  .form__row {
    flex-direction: column;
    gap:            0;
  }

  /* Footer en columnas de dos */
  .footer__inner {
    flex-wrap: wrap;
    gap:       2rem;
  }

  .footer__col {
    flex:      1 1 calc(50% - 1rem);
    min-width: 180px;
  }
}

/* Móvil → 480px */
@media (max-width: 480px) {

  .header__name  { font-size: 1.1rem; }
  .hero__title   { font-size: 1.3rem; }

  .form-card__title { font-size: 1rem; }
  .form__btn        { font-size: .88rem; }

  /* Footer en una columna */
  .footer__inner { flex-direction: column; }
  .footer__col   { flex: 1 1 100%; }
}