:root {
    --glr-red: #E30613;
    --glr-black: #1a1a1a;
    --glr-dark-grey: #333333;
    --glr-light-grey: #f4f4f4;
    --glr-white: #ffffff;
    --text-color: #333333;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--glr-light-grey);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
header {
    background-color: var(--glr-black);
    color: var(--glr-white);
    padding: 1rem 0;
    border-bottom: 5px solid var(--glr-red);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    color: var(--glr-white);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: bold;
    text-transform: uppercase;
}

.logo span {
    color: var(--glr-red);
}

.nav-links {
    list-style: none;
    display: flex;
}

.nav-links li {
    margin-left: 20px;
}

.nav-links a {
    color: var(--glr-white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--glr-red);
}

/* Main Content */
main {
    flex: 1;
    padding: 2rem 0;
}

h1, h2, h3 {
    margin-bottom: 1rem;
    color: var(--glr-black);
}

h1 {
    font-size: 2.5rem;
    border-bottom: 3px solid var(--glr-red);
    display: inline-block;
    padding-bottom: 0.5rem;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    background-color: var(--glr-red);
    color: var(--glr-white);
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    background-color: #b3000b;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--glr-red);
    color: var(--glr-red);
}

.btn-outline:hover {
    background-color: var(--glr-red);
    color: var(--glr-white);
}

/* Cards (voor reizen) */
.reizen-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.reis-card {
    background: var(--glr-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.reis-card:hover {
    transform: translateY(-5px);
}

.reis-img {
    height: 200px;
    background-color: #ddd; /* Placeholder */
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
}

.reis-content {
    padding: 1.5rem;
}

.reis-meta {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
}

/* Forms */
.form-container {
    background: var(--glr-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    max-width: 500px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group input:focus {
    border-color: var(--glr-red);
    outline: none;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
    background: var(--glr-white);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: var(--glr-black);
    color: var(--glr-white);
}

tr:hover {
    background-color: #f1f1f1;
}

/* Footer */
footer {
    background-color: var(--glr-black);
    color: #aaa;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: auto;
    font-size: 0.9rem;
}

/* Utility */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mb-1 { margin-bottom: 1rem; }
.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 4px;
}
.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}
.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Index hero */
.hero {
    background-color: var(--glr-white);
    padding: 4rem 0;
    text-align: center;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto 2rem;
}