.header {
  background: var(--color-text-dark);
  color: var(--color-bg-white);
  padding: 20px 0; /* Vertical padding */
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px; /* Wider for header */
  margin: 0 auto;
  padding: 0 40px; /* More padding on desktop */
}

.header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 24px;
  font-weight: 600;
  text-decoration: none;
  color: inherit;
}

.abstract-logo-header {
  width: 32px;
  height: 32px;
}

.logo-divider {
  color: rgba(255, 255, 255, 0.4);
  font-size: 24px; /* Matches logo text size */
  font-weight: 300; /* Lighter weight */
  margin: 0 4px;
}

.help-center {
  color: var(--color-bg-white);
  text-decoration: none;
  font-weight: 400;
  font-size: 16px;
  opacity: 0.8;
  transition: opacity 0.2s ease;
}

.help-center:hover {
  opacity: 1;
  text-decoration: underline;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.search-desktop {
  display: block;
}

.search-input {
  padding: 10px 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  width: 300px; /* Standard width */
  font-size: 15px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-bg-white);
  outline: none;
  transition: all 0.2s ease;
}

.search-input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.search-input:focus {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.4);
}

.submit-request-btn,
.sign-in-btn {
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.submit-request-btn {
  background: transparent;
  color: var(--color-bg-white);
  border: 1px solid var(--color-text-medium);
}

.submit-request-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
}

.sign-in-btn {
  background: var(--color-primary-blue);
  color: var(--color-bg-white);
  border: none;
}

.sign-in-btn:hover {
  background: #3a4bb5;
}

/* Hamburger Menu (Mobile) */
.menu-toggle-btn {
  display: none; /* Hidden by default */
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 24px;
}

.menu-toggle-btn .bar {
  display: block;
  width: 100%;
  height: 3px;
  background: var(--color-bg-white);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.search-icon {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  width: 32px;
  height: 24px;
}
.search-icon .search-image {
  width: 20px;
  height: 20px;
  filter: invert(100%);
}