/*=============================
  GLOBAL PAGE STYLES
=============================*/
body {
    font-family: "Comic Sans MS", Arial, sans-serif;
    background-color: #f0f8ff;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

h1, h2, h3 {
    text-align: center;
    color: #003366;
}

p {
    font-size: 1.1em;
    text-align: center;
    margin: 10px 0;
}

/*=============================
  RESET FOR IMAGES
=============================*/
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/*=============================
  THUMBNAIL IMAGE
=============================*/
.thumbnail {
    display: block;
    margin: 20px auto;
    width: 150px;
    height: auto;
    border: 3px solid #003366;
    border-radius: 10px;
}

/*=============================
  NAVIGATION BAR
=============================*/
nav {
    background-color: #ffcc00;
    text-align: center;
}

nav ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

nav ul li {
    display: inline-block;
    margin: 0 10px;
}

nav ul li a {
    text-decoration: none;
    font-weight: bold;
    padding: 10px 15px;
    color: #003366;
    transition: background-color 0.3s, color 0.3s;
}

nav ul li a:hover {
    background-color: #003366;
    color: #ffcc00;
    border-radius: 5px;
}

/*=============================
  MAIN CONTENT
=============================*/
main {
    padding: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

/* SECTION CONTAINER */
section {
    width: 90%;
    max-width: 700px;
    margin: 0 auto 40px auto;
    text-align: center;
}

/*=============================
  PLANET IMAGES - FULLY RESPONSIVE
=============================*/
.planet-image {
    width: 80%;          /* Fill 80% of section container */
    max-width: 200px;    /* Never bigger than 200px */
    height: auto;         /* Keep proportions */
    display: block;
    margin: 20px auto;   /* Center image */
    border-radius: 10px;
}

/*=============================
  TABLES (used on funfact.html)
=============================*/
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

table, th, td {
    border: 2px solid #003366;
}

th {
    background-color: #ffcc00;
    color: #003366;
}

th, td {
    padding: 10px;
}

/*=============================
  QUIZ (details and summary)
=============================*/
details {
    background-color: #fff8dc;
    padding: 10px;
    border-radius: 10px;
    margin: 15px 0;
    border: 2px solid #003366;
}

summary {
    font-weight: bold;
    cursor: pointer;
}

/*=============================
  CONTACT FORM
=============================*/
form {
    background-color: #fff8dc;
    padding: 20px;
    border-radius: 10px;
    max-width: 600px;
    margin: 0 auto;
}

label {
    font-weight: bold;
    display: block;
    margin-top: 10px;
}

input[type="text"],
input[type="email"],
textarea {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    border: 2px solid #003366;
    border-radius: 5px;
}

input[type="submit"] {
    background-color: #003366;
    color: #ffcc00;
    padding: 10px 20px;
    border: none;
    margin-top: 15px;
    border-radius: 5px;
    cursor: pointer;
}

input[type="submit"]:hover {
    background-color: #002244;
}

/*=============================
  FOOTER
=============================*/
footer {
    background-color: #003366;
    color: #ffcc00;
    text-align: center;
    padding: 15px;
    margin-top: 40px;
}

/*=============================
  RESPONSIVE NAVIGATION & THUMBNAIL
=============================*/
@media screen and (max-width: 768px) {
    nav ul li {
        display: block;
        margin: 10px 0;
    }

    .thumbnail {
        width: 120px;
    }

    section {
        width: 95%;
    }
}

@media screen and (max-width: 480px) {
    nav ul li {
        margin: 8px 0;
    }

    .thumbnail {
        width: 100px;
    }

    h1 {
        font-size: 1.6em;
    }

    p {
        font-size: 1em;
    }

    /* Make planet images smaller on very small screens */
    .planet-image {
        width: 90%;
        max-width: 150px;
    }
}