/* Algemene basis */
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-size: 16px;
}

/* Header en navigatie */
header {
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  background-color: #333;
  color: white;
  padding-bottom: 0;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  background-color: #444;
  flex-wrap: wrap;
}

nav li {
  margin: 0 15px;
}

nav a {
  color: white;
  text-decoration: none;
  padding: 10px 20px;
  display: block;
  transition: background 0.2s;
}

nav a:hover,
nav a.active {
  background-color: #666;
  border-radius: 5px;
}

/* Header-afbeelding en overlay */
.header-image {
  flex: 1 1 0;
  position: relative;
  width: 100%;
  min-height: 350px;
  background-image: url('../img/header.jpg');
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: stretch;
  justify-content: flex-start;
}

.header-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  align-items: flex-start; /* tekst naar boven */
  justify-content: center;
  background: rgba(51,51,51,0.3);
  padding: 40px 0 0 0; /* alleen bovenruimte */
}

.header-overlay h1 {
  color: #fff;
  font-size: 2.2rem;
  text-align: center;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
  margin: 0 20px;
}

h2 {
  font-size: 1.5rem;
}

p, label, input, textarea, button {
  font-size: 1rem;
}

/* Expertise tekstblok UITGESCHAKELD */
/* .expertise-tekst {
  max-width: 700px;
  width: 100%;
  box-sizing: border-box;
  padding: 32px 16px 24px 16px;
  margin: 0 auto;
  background: rgba(51,51,51,0.7);
  border-radius: 12px;
  color: #fff;
  box-shadow: 0 4px 24px rgba(0,0,0,0.15);
  overflow-wrap: break-word;
  word-break: break-word;
} */

.expertise-tekst {
  max-width: 700px;
  width: 100%;
  box-sizing: border-box;
  padding: 0 16px;
  margin: 0 auto;
  color: #fff;
  overflow-wrap: break-word;
  word-break: break-word;
  background: none;
  border-radius: 0;
  box-shadow: none;
}

.expertise-tekst p {
  font-size: 1rem;
  margin-bottom: 18px;
  margin-top: 0;
  line-height: 1.6;
  color: #fff;
  background: none;
}

/* Speciaal voor referentieprojecten: grid en centreren */
.header-overlay.header-overlay-links {
  justify-content: center;
  align-items: flex-start;
  padding: 20px;
  background: rgba(51,51,51,0.3);
}

.projecten-grid.maatwerk {
  overflow: visible;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto auto auto auto;
  gap: 0px 60px;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto 0 auto;
  justify-items: center;
  box-sizing: border-box;
  padding: 0 10px;
}

#flevoland { grid-column: 1; grid-row: 1; }
#tata     { grid-column: 2; grid-row: 2; }
#ret      { grid-column: 1; grid-row: 3; }
#lidrs    { grid-column: 2; grid-row: 4; }
#prorail  { grid-column: 1; grid-row: 5; }

.project {
  text-align: center;
}

.project h2 {
  margin-bottom: 5px;
  margin-top: 25px;
  color: #fff;
}
.project p {
  margin-top: 0;
  margin-bottom: 15px;
  color: #fff;
}

/* Main content */
main {
  flex: 0 0 auto;
  padding: 20px;
  background-color: white;
  max-width: 900px;
  margin: 20px auto 0 auto;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

/* Footer */
footer {
  flex-shrink: 0;
  text-align: center;
  padding: 20px;
  background-color: #333;
  color: white;
  margin-top: 0;
}

/* Formulier (indien gebruikt op andere pagina's) */
form input,
form textarea,
form button {
  width: 100%;
  padding: 10px;
  margin-bottom: 15px;
  font-size: 1rem;
  box-sizing: border-box;
}

form button {
  background-color: #333;
  color: white;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

form button:hover {
  background-color: #555;
}

/* Contactgegevens groter lettertype */
.contact-gegevens {
  font-size: 1rem;
}

/* Responsive menu voor kleine schermen */
@media (max-width: 600px) {
  nav a {
    padding: 8px 8px;
    font-size: 0.95em;
  }
  nav li {
    margin: 0 5px;
  }
}

/* Responsive projecten-grid voor kleine schermen */
@media (max-width: 700px) {
  .projecten-grid.maatwerk {
    grid-template-columns: 1fr;
    gap: 20px 0;
    max-width: 100%;
    padding: 0 5vw;
  }
  .projecten-grid.maatwerk > .project {
    grid-column: auto !important;
    grid-row: auto !important;
  }
}

/* Responsive expertise tekst */
@media (max-width: 800px) {
  .expertise-tekst {
    width: 100%;
    max-width: 100%;
    padding: 0 2vw;
    font-size: 1rem;
    box-sizing: border-box;
    margin: 0;
    background: none;
    border-radius: 0;
    box-shadow: none;
  }
}