/* 
 * Bootstrap 3.4.1 File Input Modernizer
 * Diseño personalizado que se integra perfectamente con Bootstrap 3
 * 
 * Uso:
 * <div class="file-input-wrapper">
 *   <input type="file" id="file" name="file">
 *   <label for="file" class="file-input-btn">
 *     <span class="btn-text">Examinar</span>
 *     <span class="file-text">Ningún archivo seleccionado</span>
 *   </label>
 * </div>
 */

/* Wrapper principal */
.file-input-wrapper {
  position: relative;
  display: inline-block;
  width: 100%;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* Input file oculto */
.file-input-wrapper input[type="file"] {
  position: absolute;
  left: -9999px;
  opacity: 0;
  width: 0.1px;
  height: 0.1px;
  z-index: -1;
}

/* Label que actúa como botón personalizado */
.file-input-btn {
  display: block;
  width: 100%;
  padding: 6px 12px;
  margin-bottom: 0;
  font-size: 14px;
  font-weight: normal;
  line-height: 1.42857143;
  color: #555;
  background-color: #fff;
  background-image: none;
  border: 1px solid #ccc;
  border-radius: 4px;
  cursor: pointer;
  transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
  text-align: left;
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

/* Hover del label */
.file-input-btn:hover {
  background-color: #f5f5f5;
  border-color: #adadad;
  color: #333;
  text-decoration: none;
}

/* Focus del input (se aplica al label) */
.file-input-wrapper input[type="file"]:focus + .file-input-btn {
  border-color: #66afe9;
  outline: 0;
  box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102,175,233,.6);
}

/* Botón interno "Examinar" */
.file-input-btn .btn-text {
  display: inline-block;
  padding: 4px 12px;
  margin: -6px 12px -6px -12px;
  background-color: #337ab7;
  color: #fff;
  border-right: 1px solid #ccc;
  font-size: 14px;
  font-weight: normal;
  line-height: 1.42857143;
  vertical-align: middle;
  text-align: center;
  white-space: nowrap;
  border-top-left-radius: 3px;
  border-bottom-left-radius: 3px;
}

/* Hover del botón interno */
.file-input-btn:hover .btn-text {
  background-color: #286090;
}

/* Texto del archivo */
.file-input-btn .file-text {
  color: #999;
  font-style: italic;
  padding-left: 8px;
  display: inline-block;
  vertical-align: middle;
  max-width: calc(100% - 100px);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Cuando hay archivo seleccionado */
.file-input-wrapper.has-file .file-text {
  color: #333;
  font-style: normal;
  font-weight: 500;
}

/* Estado deshabilitado */
.file-input-wrapper.disabled .file-input-btn,
.file-input-wrapper input[type="file"]:disabled + .file-input-btn {
  background-color: #eee;
  opacity: 1;
  cursor: not-allowed;
  color: #777;
}

.file-input-wrapper.disabled .btn-text,
.file-input-wrapper input[type="file"]:disabled + .file-input-btn .btn-text {
  background-color: #777;
  border-right-color: #ccc;
}

/* Variantes de color - Success */
.file-input-wrapper.btn-success .btn-text {
  background-color: #5cb85c;
}

.file-input-wrapper.btn-success .file-input-btn:hover .btn-text {
  background-color: #449d44;
}

/* Variantes de color - Info */
.file-input-wrapper.btn-info .btn-text {
  background-color: #5bc0de;
}

.file-input-wrapper.btn-info .file-input-btn:hover .btn-text {
  background-color: #31b0d5;
}

/* Variantes de color - Warning */
.file-input-wrapper.btn-warning .btn-text {
  background-color: #f0ad4e;
}

.file-input-wrapper.btn-warning .file-input-btn:hover .btn-text {
  background-color: #ec971f;
}

/* Variantes de color - Danger */
.file-input-wrapper.btn-danger .btn-text {
  background-color: #d9534f;
}

.file-input-wrapper.btn-danger .file-input-btn:hover .btn-text {
  background-color: #c9302c;
}

/* Tamaños - Small */
.file-input-wrapper.input-sm .file-input-btn {
  padding: 5px 10px;
  font-size: 12px;
  line-height: 1.5;
  border-radius: 3px;
}

.file-input-wrapper.input-sm .btn-text {
  padding: 3px 10px;
  margin: -5px 10px -5px -10px;
  font-size: 12px;
  line-height: 1.5;
}

/* Tamaños - Large */
.file-input-wrapper.input-lg .file-input-btn {
  padding: 10px 16px;
  font-size: 18px;
  line-height: 1.3333333;
  border-radius: 6px;
}

.file-input-wrapper.input-lg .btn-text {
  padding: 8px 16px;
  margin: -10px 16px -10px -16px;
  font-size: 18px;
  line-height: 1.3333333;
}

/* Responsive */
@media (max-width: 767px) {
  .file-input-btn {
    font-size: 13px;
    padding: 5px 10px;
  }
  
  .file-input-btn .btn-text {
    font-size: 12px;
    padding: 3px 8px;
    margin: -5px 8px -5px -10px;
  }
  
  .file-input-btn .file-text {
    font-size: 13px;
    max-width: calc(100% - 80px);
  }
}