html, body {
    height: 100%;
    background-image: url('https://media.istockphoto.com/id/1341348395/photo/old-dark-brown-wooden-board.webp?b=1&s=170667a&w=0&k=20&c=2RkgZGKXuSVu78tb-13vUpNiHacLoYgQ9MwAt0_5KiI=');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}


#reservation-form {
    max-width: 600px;
    margin: 0 auto;
    background-color: rgba(255, 255, 255, 0.9); 
    padding: 2em;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 10px; 
}

:root {
    --bar-width: 60px;
    --bar-height: 8px;
    --hamburger-gap: 6px;
    --foreground: #333;
    --background: white;
    --hamburger-margin: 8px;
    --animation-timing: 200ms ease-in-out;
    --hamburger-height: calc(var(--bar-height) * 3 + var(--hamburger-gap) * 2);
    --link-color: #fff;
    --link-hover-color: #ccc;
    --link-background: #444;
    --link-hover-background: #666;
    --sidebar-width: 250px;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    display: flex;
}

.hamburger-menu {
    --x-width: calc(var(--hamburger-height) * 1.41421356237);
    display: flex;
    flex-direction: column;
    gap: var(--hamburger-gap);
    width: max-content;
    position: absolute;
    top: var(--hamburger-margin);
    left: var(--hamburger-margin);
    z-index: 2;
    cursor: pointer;
}

.hamburger-menu:has(input:checked) {
    --foreground: white;
    --background: #333;
}

.hamburger-menu:has(input:focus-visible)::before,
.hamburger-menu:has(input:focus-visible)::after,
.hamburger-menu input:focus-visible {
    border: 1px solid var(--background);
    box-shadow: 0 0 0 1px var(--foreground);
}

.hamburger-menu::before,
.hamburger-menu::after,
.hamburger-menu input {
    content: "";
    width: var(--bar-width);
    height: var(--bar-height);
    background-color: var(--foreground);
    border-radius: 9999px;
    transform-origin: left center;
    transition: opacity var(--animation-timing), width var(--animation-timing),
        rotate var(--animation-timing), translate var(--animation-timing),
        background-color var(--animation-timing);
}

.hamburger-menu input {
    appearance: none;
    padding: 0;
    margin: 0;
    outline: none;
    pointer-events: none;
}

.hamburger-menu:has(input:checked)::before {
    rotate: 45deg;
    width: var(--x-width);
    translate: 0 calc(var(--bar-height) / -2);
}

.hamburger-menu:has(input:checked)::after {
    rotate: -45deg;
    width: var(--x-width);
    translate: 0 calc(var(--bar-height) / 2);
}

.hamburger-menu input:checked {
    opacity: 0;
    width: 0;
}

.sidebar {
    transition: transform var(--animation-timing);
    transform: translateX(-100%);
    padding: 0.5rem 1rem;
    padding-top: calc(var(--hamburger-height) + var(--hamburger-margin) + 1rem);
    background-color: var(--foreground);
    color: var(--background);
    width: var(--sidebar-width);
    min-height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1;
}

.hamburger-menu:has(input:checked) + .sidebar {
    transform: translateX(0);
}

.sidebar nav a {
    display: block;
    color: var(--link-color);
    background-color: var(--link-background);
    padding: 0.75rem 1rem;
    margin: 0.5rem 0;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color var(--animation-timing), color var(--animation-timing);
}

.sidebar nav a:hover {
    background-color: var(--link-hover-background);
    color: var(--link-hover-color);
}

.content {
    flex-grow: 1;
    margin-left: calc(var(--hamburger-margin) + var(--hamburger-height));
    padding: 2rem;
    transition: margin-left var(--animation-timing);
}

#menu-toggle:checked ~ .content {
    margin-left: calc(var(--sidebar-width) + var(--hamburger-margin) + var(--hamburger-height));
}

main {
    margin-left: calc(var(--hamburger-height) + var(--hamburger-margin) + 1rem);
}

#reservation-form {
    max-width: 600px;
    margin: 0 auto;
    background-color: #fff;
    padding: 2em;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

#reservation-form label {
    display: block;
    margin-bottom: 0.5em;
}

#reservation-form input {
    width: 100%;
    padding: 0.5em;
    margin-bottom: 1em;
    border: 1px solid #ccc;
    border-radius: 4px;
}

#reservation-form button {
    padding: 0.75em 1.5em;
    background-color: #333;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

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

#thank-you-message {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 20px green;
    z-index: 1000;
}

#thank-you-message h2 {
    font-size: 2em;
    color: green;
    margin: 0;
}
@media only screen and (max-width: 600px) {
    .content {
        margin-left: 0; 
        padding: 1rem; 
    }

    #reservation-form {
        width: 90%; 
    }

    #reservation-form input,
    #reservation-form button {
        width: 100%; 
    }
}