Bonjour,

Je suis novice dans le web, je viens de créer mon premier site web via elementor.

J'ai cependant un probleme que je n'arrive pas à résoudre, j'ai une bande blanche en haut de header et je ne trouve pas la solution sur internet.

https://www.giteansecocoluberon.com/

Mon ficher CSS trouvé sur le thème de elementor/wordpress:

/*
    Theme Name: Hello Elementor
    Theme URI: https://elementor.com/hello-theme/?utm_source=wp-themes&utm_campaign=theme-uri&utm_medium=wp-dash
    Description: Hello Elementor is a lightweight and minimalist WordPress theme that was built specifically to work seamlessly with the Elementor page builder plugin. The theme is free, open-source, and designed for users who want a flexible, easy-to-use, and customizable website. The theme, which is optimized for performance, provides a solid foundation for users to build their own unique designs using the Elementor drag-and-drop site builder. Its simplicity and flexibility make it a great choice for both beginners and experienced Web Creators.
    Author: Elementor Team
    Author URI: https://elementor.com/?utm_source=wp-themes&utm_campaign=author-uri&utm_medium=wp-dash
    Version: 2.9.0
    Stable tag: 2.9.0
    Requires at least: 6.0
    Tested up to: 6.3
    Requires PHP: 7.0
    License: GNU General Public License v3 or later.
    License URI: https://www.gnu.org/licenses/gpl-3.0.html
    Text Domain: hello-elementor
    Tags: accessibility-ready, flexible-header, custom-colors, custom-menu, custom-logo, featured-images, rtl-language-support, threaded-comments, translation-ready,
*/
/**
 * DO NOT CHANGE THIS FILE!
 * To override any of the settings in this section, add your styling code in the custom directory.
 * Loading first in the style.scss & classic-editor.scss
 */
/*
 * Inspired by Normalize.css, HTML5 Boilerplate & Bootstrap Reboot Projects under MIT License
 */
/**
 * Document basic styling
 * DO NOT CHANGE THIS FILE!
 * To override any of the settings in this section, add your styling code in the custom directory.
 */
/**
 * 1. Correct the line height in all browsers.
 * 2. Prevent adjustments of font size after orientation changes in iOS.
 * 3. Change from `box-sizing: content-box` so that `width` is not affected by `padding` or `border`.
 */
html {
  line-height: 1.15; /* 1 */
  -webkit-text-size-adjust: 100%; /* 2 */
}

*,
*::before,
*::after {
  box-sizing: border-box; /* 3 */
}

/* Sections
 */

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: #333333;
  background-color: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/**
 * Correct the font size and margin on `h1` elements within `section` and
 * `article` contexts in Chrome, Firefox, and Safari.
 */
h1, h2, h3, h4, h5, h6 {
  margin-block-start: 0.5rem;
  margin-block-end: 1rem;
  font-family: inherit;
  font-weight: 500;
  line-height: 1.2;
  color: inherit;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-block-start: 0;
  margin-block-end: 0.9rem;
}

/* Grouping content
 */
/**
 * 1. Add the correct box sizing in Firefox.
 * 2. Show the overflow in Edge and IE.
 */
hr {
  box-sizing: content-box; /* 1 */
  height: 0; /* 1 */
  overflow: visible; /* 2 */
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */
pre {
  font-family: monospace, monospace; /* 1 */
  font-size: 1em; /* 2 */
  white-space: pre-wrap;
}

/* Text-level semantics
 */
a {
  background-color: transparent;
  text-decoration: none;
  color: #CC3366;
}
a:hover, a:active {
  color: #333366;
}
a:not([href]):not([tabindex]) {
  color: inherit;
  text-decoration: none;
}
a:not([href]):not([tabindex]):hover, a:not([href]):not([tabindex]):focus {
  color: inherit;
  text-decoration: none;
}
a:not([href]):not([tabindex]):focus {
  outline: 0;
}

/**
 * 1. Remove the bottom border in Chrome 57-
 * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
 */
abbr[title] {
  border-block-end: none; /* 1 */
  text-decoration: underline dotted; /* 2 */
}

/**
 * Add the correct font weight in Chrome, Edge, and Safari.
 */
b,
strong {
  font-weight: bolder;
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */
code,
kbd,
samp {
  font-family: monospace, monospace; /* 1 */
  font-size: 1em; /* 2 */
}

/**
 * Add the correct font size in all browsers.
 */
small {
  font-size: 80%;
}

/**
 * Prevent `sub` and `sup` elements from affecting the line height in
 * all browsers.
 */
sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

/* Embedded content
 */
/**
 * Remove the border on images inside links in IE 10.
 */
img {
  border-style: none;
  height: auto;
  max-width: 100%;
}

/* Interactive
 */
/*
 * Add the correct display in Edge, IE 10+, and Firefox.
 */
details {
  display: block;
}

/*
 * Add the correct display in all browsers.
 */
summary {
  display: list-item;
}

figcaption {
  font-size: 16px;
  color: #333333;
  line-height: 1.4;
  font-style: italic;
  font-weight: 400;
}

/* Misc
 */
/**
 * Add the correct display in IE 10+.
 */
template {
  display: none;
}

/**
 * Add the correct display in IE 10.
 */
[hidden] {
  display: none;
}

/* Print
 */
@media print {
  *,
  *:before,
  *:after {
    background: transparent !important;
    color: #000 !important; /* Black prints faster */
    -webkit-box-shadow: none !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  a,
  a:visited {
    text-decoration: underline;
  }
  a[href]:after {
    content: " (" attr(href) ")";
  }
  abbr[title]:after {
    content: " (" attr(title) ")";
  }
  a[href^="#"]:after,
  a[href^="javascript:"]:after {
    content: "";
  }
  pre {
    white-space: pre-wrap !important;
  }
  pre,
  blockquote {
    break-inside: avoid;
    border: 1px solid #cccccc;
  }
  thead {
    display: table-header-group;
  }
  tr,
  img {
    break-inside: avoid;
  }
  p,
  h2,
  h3 {
    orphans: 3;
    widows: 3;
  }
  h2,
  h3 {
    break-after: avoid;
  }
}
/**
 * Form styling
 * DO NOT CHANGE THIS FILE!
 * To override any of the settings in this section, add your styling code in the custom directory.
 */
label {
  display: inline-block;
  line-height: 1;
  vertical-align: middle;
}

/**
 * 1. Change the font styles in all browsers.
 * 2. Remove the margin in Firefox and Safari.
 */
button,
input,
optgroup,
select,
textarea {
  font-family: inherit; /* 1 */
  font-size: 1rem; /* 1 */
  line-height: 1.5; /* 1 */
  margin: 0; /* 2 */
}

input[type=text],
input[type=date],
input[type=email],
input[type=number],
input[type=password],
input[type=search],
input[type=tel],
input[type=url],
select,
textarea {
  width: 100%;
  border: solid 1px #666666;
  border-radius: 3px;
  padding: 0.5rem 1rem;
  transition: all 0.3s;
}
input[type=text]:focus,
input[type=date]:focus,
input[type=email]:focus,
input[type=number]:focus,
input[type=password]:focus,
input[type=search]:focus,
input[type=tel]:focus,
input[type=url]:focus,
select:focus,
textarea:focus {
  border-color: #333333;
}

/**
 * Show the overflow in IE.
 * 1. Show the overflow in Edge.
 */
button,
input { /* 1 */
  overflow: visible;
}

/**
 * Remove the inheritance of text transform in Edge, Firefox, and IE.
 * 1. Remove the inheritance of text transform in Firefox.
 */
button,
select { /* 1 */
  text-transform: none;
}

/**
 * Correct the inability to style clickable types in iOS and Safari.
 */
button,
[type=button],
[type=reset],
[type=submit] {
  width: auto;
  -webkit-appearance: button;
}

/**
 * Remove the inner border and padding in Firefox.
 */
button::-moz-focus-inner,
[type=button]::-moz-focus-inner,
[type=reset]::-moz-focus-inner,
[type=submit]::-moz-focus-inner {
  border-style: none;
  padding: 0;
}

/**
 * Restore the focus styles unset by the previous rule.
 */
button:-moz-focusring,
[type=button]:-moz-focusring,
[type=reset]:-moz-focusring,
[type=submit]:-moz-focusring {
  outline: 1px dotted ButtonText;
}

button,
[type=submit],
[type=button] {
  display: inline-block;
  font-weight: 400;
  color: #CC3366;
  text-align: center;
  white-space: nowrap;
  user-select: none;
  background-color: transparent;
  border: 1px solid #CC3366;
  padding: 0.5rem 1rem;
  font-size: 1rem;
  border-radius: 3px;
  transition: all 0.3s;
}
button:focus,
[type=submit]:focus,
[type=button]:focus {
  outline: 5px auto -webkit-focus-ring-color;
}
button:hover, button:focus,
[type=submit]:hover,
[type=submit]:focus,
[type=button]:hover,
[type=button]:focus {
  color: #ffffff;
  background-color: #CC3366;
  text-decoration: none;
}
button:not(:disabled),
[type=submit]:not(:disabled),
[type=button]:not(:disabled) {
  cursor: pointer;
}

/**
 * Correct the padding in Firefox.
 */
fieldset {
  padding: 0.35em 0.75em 0.625em;
}

/**
 * 1. Correct the text wrapping in Edge and IE.
 * 2. Correct the color inheritance from `fieldset` elements in IE.
 * 3. Remove the padding so developers are not caught out when they zero out
 *    `fieldset` elements in all browsers.
 */
legend {
  box-sizing: border-box; /* 1 */
  color: inherit; /* 2 */
  display: table; /* 1 */
  max-width: 100%; /* 1 */
  padding: 0; /* 3 */
  white-space: normal; /* 1 */
}

/**
 * Add the correct vertical alignment in Chrome, Firefox, and Opera.
 */
progress {
  vertical-align: baseline;
}

/**
 * Remove the default vertical scrollbar in IE 10+.
 */
textarea {
  overflow: auto;
  resize: vertical;
}

/**
 * 1. Add the correct box sizing in IE 10.
 * 2. Remove the padding in IE 10.
 */
[type=checkbox],
[type=radio] {
  box-sizing: border-box; /* 1 */
  padding: 0; /* 2 */
}

/**
 * Correct the cursor style of increment and decrement buttons in Chrome.
 */
[type=number]::-webkit-inner-spin-button,
[type=number]::-webkit-outer-spin-button {
  height: auto;
}

/**
 * 1. Correct the odd appearance in Chrome and Safari.
 * 2. Correct the outline style in Safari.
 */
[type=search] {
  -webkit-appearance: textfield; /* 1 */
  outline-offset: -2px; /* 2 */
}

/**
 * Remove the inner padding in Chrome and Safari on macOS.
 */
[type=search]::-webkit-search-decoration {
  -webkit-appearance: none;
}

/**
 * 1. Correct the inability to style clickable types in iOS and Safari.
 * 2. Change font properties to `inherit` in Safari.
 */
::-webkit-file-upload-button {
  -webkit-appearance: button; /* 1 */
  font: inherit; /* 2 */
}

select {
  display: block;
}

/**
 * Table styling
 * DO NOT CHANGE THIS FILE!
 * To override any of the settings in this section, add your styling code in the custom directory.
 */
table {
  background-color: transparent;
  width: 100%;
  margin-block-end: 15px;
  font-size: 0.9em;
  border-spacing: 0;
  border-collapse: collapse;
}
table th,
table td {
  padding: 15px;
  line-height: 1.5;
  vertical-align: top;
  border: 1px solid rgba(128, 128, 128, 0.5019607843);
}
table th {
  font-weight: bold;
}
table thead th,
table tfoot th {
  font-size: 1em;
}
table caption + thead tr:first-child th,
table caption + thead tr:first-child td,
table caption + thead tr:first-child th,
table caption + thead tr:first-child td,
table colgroup + thead tr:first-child th,
table colgroup + thead tr:first-child td,
table colgroup + thead tr:first-child th,
table colgroup + thead tr:first-child td,
table thead:first-child tr:first-child th,
table thead:first-child tr:first-child td,
table thead:first-child tr:first-child th,
table thead:first-child tr:first-child td {
  border-block-start: 1px solid rgba(128, 128, 128, 0.5019607843);
}
table tbody > tr:nth-child(odd) > td,
table tbody > tr:nth-child(odd) > th {
  background-color: rgba(128, 128, 128, 0.0705882353);
}
table tbody tr:hover > td,
table tbody tr:hover > th {
  background-color: rgba(128, 128, 128, 0.1019607843);
}
table tbody + tbody {
  border-block-start: 2px solid rgba(128, 128, 128, 0.5019607843);
}
@media (max-width: 767px) {
  table table {
    font-size: 0.8em;
  }
  table table th,
  table table td {
    padding: 7px;
    line-height: 1.3;
  }
  table table th {
    font-weight: 400;
  }
}

/**
 * List styling
 * DO NOT CHANGE THIS FILE!
 * To override any of the settings in this section, add your styling code in the custom directory.
 */
dl,
dt,
dd,
ol,
ul,
li {
  margin-block-start: 0;
  margin-block-end: 0;
  border: 0;
  outline: 0;
  font-size: 100%;
  vertical-align: baseline;
  background: transparent;
}

En espérant que vous pourrez m'aider.

Bonne journée.

Nicolas

Bonjour, tu as un problème de html avant ça : tu sembles avoir une imbrication. En effet, après ton header, tu as un doctype, puis un head, un body… qui contient un header (avec le même id). Donc, corrige déjà ça, c'est important. Il faut de bonnes fondations avant de monter les murs.