:root {
  --header-height: 56px;
  --header-bg-start: #7a1fa1;
  --header-bg-mid: #9125ad;
  --header-bg-end: #7a1fa1;
  --header-border: rgba(255, 255, 255, 0.18);
  --header-text: #ffffff;
  --header-control-bg: rgba(255, 255, 255, 0.13);
  --header-control-bg-hover: rgba(255, 255, 255, 0.22);
  --header-shadow: 0 6px 20px rgba(56, 20, 86, 0.24);
  --header-logo-h: 42px;
  --header-link-h: 34px;
  --header-link-font: 13px;
}

#header.header-modern {
  position: relative;
  z-index: 1002;
  width: 100%;
  background: linear-gradient(90deg, var(--header-bg-start), var(--header-bg-mid) 55%, var(--header-bg-end));
  box-shadow: var(--header-shadow);
  border-bottom: 1px solid var(--header-border);
  overflow: visible;
}

#header.header-modern,
#header.header-modern * {
  box-sizing: border-box;
}

#header.header-modern .header-main-row {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 7px 12px;
  overflow: hidden;
}

#header.header-modern .header-left-group {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1 1 auto;
}

#header.header-modern #logo_Titre {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  height: var(--header-logo-h);
  padding-right: 8px;
  padding-left: 2px;
  float: none !important;
  margin: 0 !important;
  background: transparent !important;
}

#header.header-modern #logo_Titre a.header-logo-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 0;
  border-radius: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  text-decoration: none;
  color: inherit;
}

#header.header-modern #logo_Titre a.header-logo-link:hover .header-logo-block,
#header.header-modern #logo_Titre a.header-logo-link:focus-visible .header-logo-block {
  opacity: 0.82;
}

#header.header-modern #logo_Titre #clearLink.header-logo-block {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  justify-content: flex-start;
  box-sizing: border-box;
  height: auto;
  max-height: none;
  width: auto;
  max-width: min(340px, 92vw);
  padding: 2px 4px 2px 0;
  margin-left: 0;
  font-family: "Space Grotesk", "Poppins", system-ui, -apple-system, sans-serif;
  font-weight: 700;
  font-size: clamp(17px, 2.4vw, 1.55rem);
  letter-spacing: -0.01em;
  line-height: 1;
  color: #fff;
  text-transform: lowercase;
  white-space: nowrap;
  cursor: pointer;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#header.header-modern #logo_Titre .header-logo-tld {
  font-weight: 500;
  font-size: 0.82em;
  color: rgba(255, 220, 255, 0.88);
  letter-spacing: 0.01em;
  margin-left: 1px;
  vertical-align: baseline;
}

#header.header-modern #header_titres {
  min-width: 0;
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  margin-left: 0 !important;
  position: static !important;
}

#header.header-modern #divTitreMenu {
  min-width: 0;
  float: none !important;
}

#header.header-modern #divTitreMenu_menu {
  float: none !important;
  display: block !important;
}

#header.header-modern #nav_hor,
#header.header-modern #nav_hor ul,
#header.header-modern #nav_hor li {
  margin: 0;
  padding: 0;
}

#header.header-modern #nav_hor > ul {
  display: flex;
  align-items: center;
  gap: 2px;
}

#header.header-modern #nav_hor > ul > li {
  display: inline-flex;
  align-items: center;
}

#header.header-modern #nav_hor > ul > li > a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: var(--header-link-h);
  min-height: var(--header-link-h);
  padding: 0 14px;
  line-height: 1;
  border-radius: 8px;
  font-size: var(--header-link-font);
  font-weight: 700;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  background: transparent !important;
  color: #fff !important;
}

#header.header-modern #nav_hor > ul > li > a:hover,
#header.header-modern #nav_hor > ul > li > a:focus {
  background: rgba(255, 255, 255, 0.16) !important;
  color: #fff !important;
}

#header.header-modern #nav_hor .submenu > li > a {
  height: auto !important;
  min-height: 0 !important;
  justify-content: flex-start;
  text-transform: none;
  letter-spacing: 0.2px;
  font-size: 13px;
  padding: 10px 14px;
}

#header.header-modern #header_code,
#header.header-modern #header_supervision {
  margin-left: 0 !important;
  position: static !important;
}

#header.header-modern .header-right-group {
  flex: 0 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
}

#header.header-modern #sideSerialControls {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 8px;
  min-width: 0;
}

#header.header-modern #sideSerialControls > button,
#header.header-modern #sideSerialControls > select,
#header.header-modern #sideSerialControls .mode-dropdown-toggle {
  height: 30px;
  border-radius: 10px;
  border: 1px solid var(--header-border) !important;
  background: var(--header-control-bg) !important;
  color: var(--header-text) !important;
  box-shadow: none !important;
}

#header.header-modern #sideSerialControls > button:hover,
#header.header-modern #sideSerialControls > button:focus,
#header.header-modern #sideSerialControls > select:hover,
#header.header-modern #sideSerialControls > select:focus,
#header.header-modern #sideSerialControls .mode-dropdown-toggle:hover,
#header.header-modern #sideSerialControls .mode-dropdown-toggle:focus {
  background: var(--header-control-bg-hover) !important;
  color: var(--header-text) !important;
}

#header.header-modern #sideSerialControls #side_serialport {
  max-width: 280px;
  min-width: 170px;
}

#header.header-modern #sideSerialControls #side_btn_upload {
  font-weight: 700;
}

#header.header-modern #nav_hor > ul > li + li {
  border-left-color: var(--header-border);
}

#header.header-modern #nav_hor .submenu {
  z-index: 1008;
}

#header.header-modern #sideSerialControls .dropdown-menu,
#header.header-modern .mode-dropdown-menu {
  z-index: 1012 !important;
}

#header.header-modern #divTitreMenu {
  overflow: visible;
}

/* Keep content panels aligned with dynamic header height */
#mainContent {
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
}

#sidePreview {
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
}

@media (max-width: 1280px) {
  #header.header-modern .header-main-row {
    gap: 8px;
    padding: 6px 10px;
  }

  #header.header-modern #sideSerialControls > button,
  #header.header-modern #sideSerialControls > select,
  #header.header-modern #sideSerialControls .mode-dropdown-toggle {
    height: 28px;
    font-size: 12px;
  }

  :root {
    --header-logo-h: 38px;
    --header-link-h: 32px;
    --header-link-font: 12px;
  }

  #header.header-modern #logo_Titre #clearLink.header-logo-block {
    max-width: 280px;
    font-size: clamp(15px, 2.1vw, 1.35rem);
    padding: 2px 4px 2px 0;
  }
}

@media (max-width: 1024px) {
  #header.header-modern .header-main-row {
    flex-wrap: wrap;
    align-items: stretch;
  }

  #header.header-modern .header-left-group,
  #header.header-modern .header-right-group {
    width: 100%;
  }

  #header.header-modern #logo_Titre {
    padding-right: 4px;
    height: 34px;
  }

  #header.header-modern #logo_Titre #clearLink.header-logo-block {
    max-width: 240px;
    font-size: clamp(13px, 3vw, 1.1rem);
    margin-left: 0;
  }

  #header.header-modern .header-right-group {
    justify-content: flex-start;
  }

  #header.header-modern #sideSerialControls {
    flex-wrap: wrap;
    row-gap: 6px;
  }

  #header.header-modern #nav_hor > ul > li > a {
    padding: 0 10px;
  }

  #header.header-modern #sideSerialControls #side_serialport {
    min-width: 150px;
    max-width: 100%;
  }
}

@media (max-width: 720px) {
  #header.header-modern #logo_Titre a.header-logo-link {
    padding: 0;
    border-radius: 0;
  }

  #header.header-modern #logo_Titre #clearLink.header-logo-block {
    max-width: 220px;
    font-size: clamp(12px, 3.5vw, 15px);
    padding: 2px 4px 2px 0;
  }

  :root {
    --header-logo-h: 30px;
    --header-link-h: 30px;
    --header-link-font: 11px;
  }

  #header.header-modern #divTitreMenu {
    overflow-x: auto;
    overflow-y: visible;
    -webkit-overflow-scrolling: touch;
    width: 100%;
  }

  #header.header-modern #nav_hor ul {
    white-space: nowrap;
  }

  #header.header-modern #sideSerialControls > button,
  #header.header-modern #sideSerialControls > select,
  #header.header-modern #sideSerialControls .mode-dropdown-toggle {
    min-height: 32px;
    font-size: 12px;
  }
}

@media (max-width: 520px) {
  #header.header-modern #logo_Titre #clearLink.header-logo-block {
    max-width: 200px;
    font-size: clamp(12px, 4vw, 14px);
    letter-spacing: -0.005em;
  }
}