/* =========================================================
   MÓDULO INSTITUCIONAL · REGISTRO DE ALUMNOS · UPN 071
   LAYOUT HORIZONTAL COMPACTO
   ========================================================= */

:root {
  --upn-azul:          #1a4c8b;
  --upn-azul-oscuro:   #143a6a;
  --upn-azul-claro:    #eaf0f9;
  --upn-dorado:        #d4a017;
  --upn-dorado-oscuro: #b8880f;
  --upn-blanco:        #ffffff;
  --upn-gris-fondo:    #f4f7fc;
  --upn-gris-borde:    #e2e8f0;
  --upn-texto:         #2a2a2a;
  --upn-texto-suave:   #5a6472;
  --upn-sombra-suave:  0 4px 14px rgba(26, 76, 139, .08);
  --upn-sombra-media:  0 12px 32px rgba(26, 76, 139, .15);
  --upn-radio:         14px;
  --upn-transicion:    all .3s cubic-bezier(.2,.7,.3,1);
}

/* =========================================================
   BODY
   ========================================================= */
.upn-body {
  font-family: 'Poppins', sans-serif;
  color: var(--upn-texto);
  background:
    radial-gradient(circle at 8% 0%, rgba(26,76,139,.07), transparent 45%),
    radial-gradient(circle at 92% 100%, rgba(212,160,23,.07), transparent 45%),
    var(--upn-gris-fondo);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  margin: 0;
}

/* =========================================================
   HEADER COMPACTO
   ========================================================= */
.upn-header {
  background: linear-gradient(135deg, var(--upn-azul) 0%, var(--upn-azul-oscuro) 100%);
  padding: 26px 0 40px;                    /* ← MODIFICADO: menos alto */
  position: relative;
  overflow: hidden;
  margin-bottom: -30px;
}

.upn-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(135deg,
      rgba(255,255,255,.035) 0 2px,
      transparent 2px 22px);
  pointer-events: none;
}

.upn-header::after {
  content: "";
  position: absolute;
  right: -100px;
  top: -100px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212,160,23,.22), transparent 70%);
  pointer-events: none;
}

.upn-header-inner {
  display: flex;
  align-items: center;
  gap: 22px;
  position: relative;
  z-index: 2;
}

.upn-header-escudo {
  flex: 0 0 auto;
  width: 74px;                              /* ← MODIFICADO: más pequeño */
  height: 74px;
  border-radius: 50%;
  background: rgba(255,255,255,.10);
  border: 2px solid rgba(255,255,255,.28);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 9px;
  backdrop-filter: blur(4px);
}

.upn-header-escudo img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.upn-header-texto { flex: 1; }

.upn-header-etiqueta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  letter-spacing: 1.3px;
  text-transform: uppercase;
  color: rgba(255,255,255,.85);
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.20);
  padding: 3px 11px;
  border-radius: 40px;
  margin-bottom: 6px;
  font-weight: 500;
}

.upn-header h1 {
  font-family: 'Sen', sans-serif;
  font-weight: 800;
  font-size: 26px;                          /* ← MODIFICADO */
  color: #fff;
  line-height: 1.1;
  margin: 0 0 4px;
  letter-spacing: -.5px;
}

.upn-header p {
  font-size: 13px;
  color: rgba(255,255,255,.88);
  margin: 0;
}

/* Badge lateral del header (nuevo) */
.upn-header-badge {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.20);
  border-radius: 12px;
  padding: 12px 18px;
  color: #fff;
  font-size: 12.5px;
  line-height: 1.35;
}

.upn-header-badge i {
  font-size: 22px;
  color: var(--upn-dorado);
}

.upn-header-badge b { font-weight: 600; }

/* =========================================================
   MAIN + CARD ANCHA
   ========================================================= */
.upn-main {
  flex: 1;
  padding: 0 0 30px;                        /* ← MODIFICADO */
  position: relative;
  z-index: 3;
}

.upn-card {
  background: #fff;
  border-radius: var(--upn-radio);
  box-shadow: var(--upn-sombra-media);
  overflow: hidden;
  max-width: 1280px;                        /* ← MODIFICADO: más ancha */
  margin: 0 auto;
  border: 1px solid rgba(26,76,139,.08);
}

.upn-card-franja {
  height: 6px;
  background: linear-gradient(90deg,
    var(--upn-azul) 0%,
    var(--upn-azul-oscuro) 55%,
    var(--upn-dorado) 100%);
}

.upn-card-body { padding: 24px 30px 22px; } /* ← MODIFICADO: menos alto */

/* =========================================================
   AVISO EN UNA LÍNEA
   ========================================================= */
.upn-aviso-inline {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--upn-azul-claro);
  border-left: 4px solid var(--upn-azul);
  border-radius: 10px;
  padding: 10px 16px;                       /* ← MODIFICADO */
  margin-bottom: 18px;                      /* ← MODIFICADO */
}

.upn-aviso-inline i {
  color: var(--upn-azul);
  font-size: 16px;
  flex: 0 0 auto;
}

.upn-aviso-inline p {
  font-size: 12.5px;                        /* ← MODIFICADO */
  line-height: 1.5;
  color: var(--upn-texto-suave);
  margin: 0;
}

.upn-aviso-inline strong { color: var(--upn-azul); }

.req { color: #c0392b; font-weight: 700; }

/* =========================================================
   CAMPOS
   ========================================================= */
.form-label {
  font-size: 11.5px;                        /* ← MODIFICADO */
  font-weight: 600;
  color: var(--upn-texto);
  text-transform: uppercase;
  letter-spacing: .6px;
  margin-bottom: 5px;                       /* ← MODIFICADO */
}

.upn-input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.upn-input-group > i {
  position: absolute;
  left: 12px;
  color: var(--upn-azul);
  font-size: 13px;
  pointer-events: none;
  z-index: 2;
  transition: color .2s ease;
}

.upn-input-group .form-control,
.upn-input-group .form-select {
  padding: 9px 12px 9px 36px;               /* ← MODIFICADO: menos alto */
  border: 1.5px solid var(--upn-gris-borde);
  border-radius: 9px;
  font-size: 13.5px;                        /* ← MODIFICADO */
  color: var(--upn-texto);
  background-color: #fbfcfe;
  transition: var(--upn-transicion);
  box-shadow: none;
  height: 42px;                             /* ← NUEVO: altura uniforme */
}

.upn-input-group .form-control::placeholder {
  color: #a8b3c1;
  font-size: 12.5px;
}

.upn-input-group .form-control:focus,
.upn-input-group .form-select:focus {
  border-color: var(--upn-azul);
  background-color: #fff;
  box-shadow: 0 0 0 3px rgba(26,76,139,.12);
}

.upn-input-group:focus-within > i { color: var(--upn-dorado-oscuro); }

.upn-input-group .form-control.is-invalid,
.upn-input-group .form-select.is-invalid {
  border-color: #c0392b;
  background-color: #fff5f5;
  background-image: none;
}

.err {
  display: block;
  font-size: 11.5px;
  font-weight: 500;
  margin-top: 3px;
  color: #c0392b !important;
  min-height: 13px;
}

/* =========================================================
   BOTÓN DE ENVÍO (alineado a la derecha, alto completo de fila)
   ========================================================= */
.upn-btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  width: 100%;
  height: 42px;                             /* ← NUEVO: igual que inputs */
  padding: 0 22px;
  border: 0;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--upn-azul) 0%, var(--upn-azul-oscuro) 100%);
  color: #fff;
  font-family: 'Sen', sans-serif;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  transition: var(--upn-transicion);
  box-shadow: 0 6px 16px rgba(26,76,139,.30);
  position: relative;
  overflow: hidden;
}

.upn-btn-submit::before {
  content: "";
  position: absolute;
  top: 0; left: -130%;
  width: 55%;
  height: 100%;
  background: linear-gradient(120deg,
    transparent 0%,
    rgba(255,255,255,.28) 50%,
    transparent 100%);
  transform: skewX(-20deg);
  transition: left .9s ease;
}

.upn-btn-submit:hover::before { left: 140%; }

.upn-btn-submit:hover,
.upn-btn-submit:focus {
  background: linear-gradient(135deg, var(--upn-dorado) 0%, var(--upn-dorado-oscuro) 100%);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(212,160,23,.42);
  color: #fff;
  outline: none;
}

/* =========================================================
   TEXTO LEGAL
   ========================================================= */
.upn-legal {
  font-size: 11.5px;
  color: #8c96a4;
  text-align: center;
  margin: 10px 0 0;                         /* ← MODIFICADO */
  line-height: 1.5;
}

/* =========================================================
   FOOTER
   ========================================================= */
.upn-footer {
  background: var(--upn-azul-oscuro);
  color: rgba(255,255,255,.85);
  padding: 16px 0;                          /* ← MODIFICADO */
  font-size: 12.5px;
}

.upn-footer p { margin: 0; }

.upn-footer a {
  color: var(--upn-dorado);
  text-decoration: none;
  font-weight: 500;
}

.upn-footer a:hover { text-decoration: underline; }

/* =========================================================
   RESPONSIVE
   ========================================================= */

/* Tabletas grandes y laptops pequeñas */
@media (max-width: 1199.98px) {
  .upn-card { max-width: 100%; }
  .upn-header-badge { display: none; }      /* se oculta para no romper */
}

/* Tabletas */
@media (max-width: 991.98px) {
  .upn-header h1 { font-size: 22px; }
  .upn-header-escudo { width: 62px; height: 62px; }
  .upn-card-body { padding: 20px 22px; }
}

/* Móvil */
@media (max-width: 767.98px) {
  .upn-header { padding: 20px 0 34px; }

  .upn-header-inner {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }
  .upn-header h1 { font-size: 20px; }
  .upn-header p { font-size: 12px; }

  .upn-card-body { padding: 16px 14px 18px; }

  .upn-aviso-inline {
    flex-direction: column;
    text-align: left;
    gap: 8px;
  }

  .upn-btn-submit { font-size: 13px; }
}

@media (max-width: 575.98px) {
  .upn-header-escudo { width: 54px; height: 54px; padding: 7px; }
  .upn-header h1 { font-size: 18px; }
  .upn-header-etiqueta { font-size: 10px; padding: 3px 9px; }

  .upn-input-group .form-control,
  .upn-input-group .form-select { height: 40px; font-size: 13px; }
}