* {
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f7f7f7;
    color: #1f1f1f;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.home {
    background-image: url('Tennis-Court.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.geschiedenis {
    background-image: url('tennispotje.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.spelregels {
    background-image: url('scheidsrechter tennis.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.vereniging-page {
    background-image: url('etc.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.contact-page {
    background-image: url('alcaraz.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: #0b522c;
    border-bottom: 3px solid #244b31;
}

nav .nav-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 1100px;
    margin: 0 auto;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0.5rem 1rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

#loginBtn {
    background: #ffcc00;
    color: #0b522c;
    border: 0;
    border-radius: 4px;
    font-weight: 700;
    padding: 0.4rem 0.8rem;
    cursor: pointer;
    transition: filter 0.2s;
}

#loginBtn:hover,
#loginBtn:focus-visible {
    filter: brightness(0.9);
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    display: grid;
    place-items: center;
    padding: 1rem;
    z-index: 200;
}

.modal[hidden] {
    display: none !important;
}

.modal-content {
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    width: min(480px, 100%);
    padding: 1.25rem;
    position: relative;
    overflow: hidden;
}

.modal-content h2 {
    margin-top: 0;
    padding-right: 2.5rem;
    color: #0b522c;
}

.modal-content label,
.modal-content input,
.modal-content button:not(.modal-close) {
    display: block;
    width: 100%;
}

.modal-content label {
    margin-bottom: 0.4rem;
    font-weight: 600;
}

.modal-content input {
    margin-bottom: 0.8rem;
    padding: 0.55rem;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1rem;
}

.modal-content button[type="submit"] {
    background: #0b522c;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    padding: 0.55rem;
    cursor: pointer;
}

.modal-content button[type="submit"]:hover,
.modal-content button[type="submit"]:focus-visible {
    background: #114e2f;
}

.modal-close {
    position: absolute;
    top: 0.6rem;
    right: 0.6rem;
    width: auto;
    width: 2.2rem;
    height: 2.2rem;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: rgba(0, 0, 0, 0.06);
    border: none;
    color: #333;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.15s;
}

.modal-close:hover,
.modal-close:focus-visible {
    background: rgba(0,0,0,0.12);
}


nav li {
    margin: 0;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    padding: 0.35rem 0.5rem;
    border-radius: 4px;
    transition: background-color 0.2s, color 0.2s;
}

nav a:hover,
nav a:focus-visible {
    background: #fff;
    color: #0b522c;
}

main {
    margin: 0;
    padding: 1rem 1rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    flex: 1;
    justify-content: center;
}

.panel {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    padding: 1.2rem;
    max-width: 900px;
    margin: 0 auto;
}

.panel h1,
.panel h2 {
    margin-top: 0;
    color: #0b522c;
    text-align: center;
}

.panel h2 {
    color: #000;
}

.panel p {
    line-height: 1.5;
    margin-bottom: 0;
}

.membership-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 0.8rem;
}

.membership-table th,
.membership-table td {
    border: 1px solid #cdd5cd;
    padding: 0.65rem;
    text-align: left;
}

.membership-table thead {
    background: #e8f3ea;
}

footer {
    background: #0b522c;
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8em 1em;
    margin-top: 1rem;
}

footer p {
    margin: 0;
}

footer a {
    color: #fff;
}

html {
    scroll-behavior: smooth;
}

@media (max-width: 700px) {
    nav ul {
        justify-content: center;
    }
    nav a {
        font-size: 0.95rem;
    }
}