[data-datamine-header] {
  position: sticky;
  top: 0;
  z-index: 40;
}

.datamine-header {
  position: relative;
  width: 100%;
  border-bottom: 1px solid var(--dm-border, rgba(255, 255, 255, 0.08));
  background: rgba(12, 9, 16, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  font-family: var(--font-sans, "Barlow", "Manrope", system-ui, sans-serif);
}

.datamine-header__inner {
  width: 100%;
  max-width: 1440px;
  box-sizing: border-box;
  min-height: 54px;
  margin: 0 auto;
  padding: 10px 28px;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto minmax(220px, 1fr);
  align-items: center;
  column-gap: 28px;
}

.datamine-header__nav,
.datamine-header__language,
.datamine-header__right-area {
  display: flex;
  align-items: center;
}

.datamine-header__brand {
  min-width: 0;
  max-width: 100%;
  justify-self: start;
  overflow: hidden;
  color: var(--dm-gold, #f5d97a);
  font-family: "Spectral", Georgia, serif;
  font-size: 17.5px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.03em;
  text-align: left;
  text-decoration: none;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.15s ease;
}

.datamine-header__brand:hover {
  color: #ffe9a8;
}

.datamine-header__nav {
  justify-self: center;
  gap: 22px;
}

.datamine-header__link {
  color: #a89fb6;
  font-family: var(--font-sans, "Barlow", "Manrope", system-ui, sans-serif);
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s ease;
}

.datamine-header__link:hover {
  color: #ffffff;
}

.datamine-header__link.is-active {
  color: var(--dm-gold, #f5d97a);
  font-weight: 500;
}

.datamine-header__right-area {
  justify-self: end;
  gap: 14px;
}

/* Language Switcher */
.datamine-header__language {
  gap: 2px;
  padding: 2px;
  border: 1px solid var(--dm-border, rgba(255, 255, 255, 0.08));
  border-radius: var(--dm-radius-sm, 6px);
  background: var(--dm-surface, #100d14);
  box-sizing: border-box;
}

.datamine-header__language-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 24px;
  box-sizing: border-box;
  padding: 0 8px;
  border: 0;
  border-radius: var(--dm-radius-xs, 4px);
  background: transparent;
  color: var(--dm-muted, #918899);
  font-family: var(--font-sans, "Barlow", "Manrope", system-ui, sans-serif);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  text-align: center;
  cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease;
}

.datamine-header__language-button:hover {
  color: var(--dm-text-strong, #f4f0f6);
}

.datamine-header__language-button.is-active {
  color: #17111f;
  background: var(--dm-gold, #f5d97a);
  font-weight: 700;
}

/* Build Version / Export Widget */
.datamine-header__export-info {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 3px 8px;
  box-sizing: border-box;
  border-radius: var(--dm-radius-sm, 6px);
  background: var(--dm-surface, #100d14);
  border: 1px solid var(--dm-border, rgba(255, 255, 255, 0.08));
  transition: border-color 0.15s ease, background 0.15s ease;
  user-select: none;
  cursor: default;
  outline: none;
}

.datamine-header__export-info:hover {
  background: var(--dm-surface-raised, #151119);
  border-color: var(--dm-border-hover, rgba(245, 217, 122, 0.28));
}

.datamine-header__version-badge {
  font-family: var(--dm-font-mono, "JetBrains Mono", monospace);
  font-size: 11px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.03em;
  color: var(--dm-gold, #f5d97a);
  padding: 1px 5px;
  box-sizing: border-box;
  border-radius: var(--dm-radius-xs, 4px);
  background: rgba(245, 217, 122, 0.1);
  border: 1px solid rgba(245, 217, 122, 0.28);
  white-space: nowrap;
  line-height: 1.25;
}

.datamine-header__export-info:hover .datamine-header__version-badge {
  background: rgba(245, 217, 122, 0.2);
  border-color: rgba(245, 217, 122, 0.5);
  color: #fff4a3;
}

.datamine-header__export-client-name {
  font-family: var(--font-sans, "Barlow", "Manrope", system-ui, sans-serif);
  font-size: 11.5px;
  font-weight: 500;
  line-height: 1.2;
  color: var(--dm-muted, #918899);
  white-space: nowrap;
}

/* Styled export tooltip */
.datamine-header__export-tooltip {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 220px;
  max-width: 280px;
  padding: 11px 13px;
  box-sizing: border-box;
  border-radius: var(--dm-radius-md, 8px);
  background: var(--dm-surface-raised, #151119);
  border: 1px solid var(--dm-border-hover, rgba(245, 217, 122, 0.28));
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px) scale(0.98);
  transform-origin: top right;
  pointer-events: none;
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s ease;
}

/* Invisible hover bridge between trigger and tooltip */
.datamine-header__export-tooltip::after {
  content: "";
  position: absolute;
  top: -10px;
  left: 0;
  right: 0;
  height: 10px;
}

.datamine-header__export-tooltip::before {
  content: "";
  position: absolute;
  top: -5px;
  right: 16px;
  width: 8px;
  height: 8px;
  background: var(--dm-surface-raised, #151119);
  border-left: 1px solid var(--dm-border-hover, rgba(245, 217, 122, 0.28));
  border-top: 1px solid var(--dm-border-hover, rgba(245, 217, 122, 0.28));
  transform: rotate(45deg);
}

.datamine-header__export-info:hover .datamine-header__export-tooltip,
.datamine-header__export-info:focus-within .datamine-header__export-tooltip,
.datamine-header__export-info.is-open .datamine-header__export-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.datamine-header__export-tooltip-title {
  font: 700 10px/1 var(--font-sans, sans-serif);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--dm-gold, #f5d97a);
  padding-bottom: 5px;
  margin-bottom: 1px;
  border-bottom: 1px solid var(--dm-border, rgba(255, 255, 255, 0.08));
}

.datamine-header__export-tooltip-row {
  display: grid;
  grid-template-columns: 68px 1fr;
  align-items: baseline;
  gap: 10px;
  font: 500 11.5px/1.3 var(--font-sans, sans-serif);
}

.datamine-header__export-tooltip-key {
  color: var(--dm-muted, #918899);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.datamine-header__export-tooltip-value {
  color: var(--dm-text-strong, #f4f0f6);
  font-family: var(--dm-font-mono, "JetBrains Mono", monospace);
  font-size: 11px;
  font-weight: 500;
  text-align: left;
  word-break: break-word;
}

/* Update Available section in popover */
.datamine-header__export-update-section {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 6px;
  padding-top: 8px;
  border-top: 1px solid var(--dm-border, rgba(255, 255, 255, 0.08));
}

.datamine-header__export-update-title {
  font-family: var(--font-sans, sans-serif);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #ff9bb2;
  margin-bottom: 2px;
}

.datamine-header__export-update-text {
  margin: 0;
  font-family: var(--font-sans, sans-serif);
  font-size: 11.5px;
  font-weight: 500;
  color: var(--dm-text-strong, #f4f0f6);
  line-height: 1.35;
}

.datamine-header__export-update-subtext {
  margin: 0;
  font-family: var(--font-sans, sans-serif);
  font-size: 11px;
  font-weight: 400;
  color: var(--dm-muted, #b4abbf);
  line-height: 1.35;
}

.datamine-header__export-help-link {
  display: inline-flex;
  align-items: center;
  margin-top: 4px;
  font-family: var(--font-sans, sans-serif);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--dm-gold, #f5d97a);
  text-decoration: none;
  transition: color 0.15s ease;
}

.datamine-header__export-help-link:hover {
  text-decoration: underline;
  color: #fff4a3;
}

.datamine-header__brand:focus-visible,
.datamine-header__link:focus-visible,
.datamine-header__language-button:focus-visible {
  outline: 2px solid var(--dm-gold, #f5d97a);
  outline-offset: 3px;
}

@media (max-width: 1080px) {
  .datamine-header__inner {
    padding-inline: 18px;
    column-gap: 16px;
  }

  .datamine-header__nav {
    gap: 12px;
  }
}

@media (max-width: 768px) {
  .datamine-header__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    padding-inline: 14px;
  }

  .datamine-header__brand {
    justify-self: start;
    text-align: left;
  }

  .datamine-header__nav {
    display: none;
  }

  .datamine-header__export-info {
    padding: 3px 8px;
    gap: 6px;
  }
}