/* General Styles */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: #c5c6c7;
     background-image: url('https://tse1.mm.bing.net/th/id/OIP.iztgneIJVW_h8jkdTK7RCgHaEK?w=3840&h=2160&rs=1&pid=ImgDetMain&o=7&rm=3');
    background-size: cover;
}

header {
    background: #1f2833;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}
  
header h1 {
    color: #66fcf1;
    font-size: 2em;
    transition: transform 0.3s;
}

header h1:hover {
    transform: scale(1.1);
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
    padding: 0;
    margin-top: 20px;
}

nav ul li a {
    color: #c5c6c7;
    text-decoration: none;
    padding: 5px 10px;
    transition: all 0.3s ease;
}

nav ul li a:hover {
    color: #66fcf1;
    background-color: #1c1f24;
    border-radius: 5px;
    text-decoration:underline;
}

/* Hero Section */
#home {
   
    height: 90vh;
    display: flex;
    justify-content: center;/*center vertically*/
    align-items: center; /*center horizontally*/
    text-align: center;
    padding: 0 20px;
}

.start-button {
    background: #45a29e;
    color: #0b0c10;
    padding: 15px 40px;
    border: none;
    border-radius: 25px;
    font-size: 1.3em;
    cursor: pointer;
    box-shadow: 0 5px #1f2833;
    transition: all 0.2s ease;
}

.start-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px #1f2833;
}

.start-button:active {
    transform: translateY(2px);
    box-shadow: 0 3px #1f2833;
}
#home h2 {
    font-size: 2.5em;
    color: #66fcf1;
    margin-bottom: 20px;
    text-shadow: 2px 2px #000;
}

#home p {
    font-size: 1.2em;
    margin-bottom: 30px;
}


/* Sections */
section {
    padding: 60px 20px;
    max-width: 1200px;
    margin: auto;
}

h2 {
    color: #45a29e;
    margin-bottom: 20px;
}

/* Planet Cards */
#planets h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #66fcf1;
}

.planet-card {
    display: flex;              /* Align text and image side by side */
    justify-content: space-between;
    align-items: center;
    background: #1f2833;
    padding: 20px;
    margin: 15px 0;
    border-radius: 10px;
    transition: transform 0.3s, box-shadow 0.3s;
    gap: 20px;                  /* Space between text and image */
}

.planet-text {
    flex: 1;                    /* Take remaining space */
    color: #c5c6c7;
}

.card-image {
    width: 300px;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
}

.planet-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 0 20px #45a29e;
}

/* Gallery */
#gallery h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #66fcf1;
}

.gallery-container {
    display: flex;              /* Align children side by side */
    justify-content: center;    /* Center horizontally */
    gap: 20px;                  /* Space between images */
    flex-wrap: wrap;            /* Wrap on smaller screens */
}

.gallery-image img { 
    width: 100%;
    max-width: 400px;
    border-radius: 10px;
    transition: transform 0.3s, filter 0.3s;
}

.gallery-image img:hover {
    transform: scale(1.05);
    filter: brightness(1.2);
}

/* Footer */
footer {
    background: #1f2833;
    color: #c5c6c7;
    text-align: center;
    padding: 40px 20px;
}

/* Toggle Dark/Light Theme Example */
body.light-mode {
    background: #f4f4f4;
    color: #222;
}

body.light-mode header {
    background: #e0e0e0;
}

body.light-mode #home button {
    background: #222;
    color: #fff;
}

body.light-mode .planet-card {
    background: #ddd;
    color: #222;
}