* {
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
    font-size: 1em;
}


body.dark-mode {
    background-color: #121212;
    color: white;
}

body.dark-mode header {
    background-color: #333;
}

body.dark-mode nav {
    background-color: #222;
}

body.dark-mode a {
    color: lightblue;
}

body.dark-mode a:hover {
    color: lightgreen;
}

body.dark-mode main {
    background-color: #222;
    color: white;
}

body.dark-mode footer {
    background-color: #333;
}

header {
    background-color: #c00;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1em 2em;
    text-align: center;
    font-size: 1em;
}

a {
    color:blue;
}

a:visited {
    color: purple;
}

a:hover {
    color: red;
}

header .date {
    font-size: 0.9em;
}

nav {
    background-color: #333;
    display: flex;
    justify-content: center;
}

nav a {
    color: white;
    padding: 1em;
    text-decoration: none;
}

nav a:visited {
    color: white;
}

nav a:hover {
    background-color: #555;
}

main {
    padding: 2em;
    max-width: 1000px;
    margin: auto;
    background-color: white;
}

.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2em;
}

.card {
    background-color: #eee;
    padding: 1em;
    border-radius: 8px;
    box-shadow: 2px 2px 5px rgba(0,0,0,0.1);
    text-align: center;
}

.card img {
    max-width: 100%;
    border-radius: 4px;
}

form label {
    display: block;
    margin-top: 1em;
    font-weight: bold;
}

form input, form textarea {
    width: 100%;
    padding: 0.5em;
    margin-top: 0.3em;
}

form input[type="submit"] {
    background-color: #c00;
    color: white;
    border: none;
    margin-top: 1em;
    cursor: pointer;
    padding: 0.7em 1.5em;
}
form input[type="submit"]:hover {
    background-color: #a00;
}

table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid black;
}
  
th, td {
    border: 1px solid black;
    padding: 8px;
    text-align: center;
}
  
thead tr {
    background-color: #333333;
    color: white;
}

.flex-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 20px;
    align-items: flex-start;
}
  
.flex-container.normal {
    flex-direction: row;
}
  
.flex-container.reverse {
    flex-direction: row-reverse;
}
  
.flex-container figure {
    flex: 1;
    min-width: 250px;
    margin: 0;
}
  
.flex-container figure img {
    max-width: 100%;
    height: auto;
}
  
.flex-container .text-block {
    flex: 2;
    min-width: 250px;
}

figure figcaption {
    text-align: center;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1em;
}