:root {
    --bg-color-dark: #121212;
    --text-color-dark: #ffffff;
    --header-color-dark: #bb86fc;
    --card-bg-color-dark: #1e1e1e;
    --border-color-dark: #333333;

    --bg-color-light: #ffffff;
    --text-color-light: #000000;
    --header-color-light: #6200ee;
    --card-bg-color-light: #f0f0f0;
    --border-color-light: #dddddd;
}

body {
    font-family: sans-serif;
    margin: 0;
    background-color: var(--bg-color-dark);
    color: var(--text-color-dark);
    transition: background-color 0.3s, color 0.3s;
}

body.light-mode {
    background-color: var(--bg-color-light);
    color: var(--text-color-light);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1em 2em;
    border-bottom: 1px solid var(--border-color-dark);
}

body.light-mode header {
    border-bottom: 1px solid var(--border-color-light);
}

header h1 {
    font-size: 1.5em;
    color: var(--header-color-dark);
    margin: 0;
}

body.light-mode header h1 {
    color: var(--header-color-light);
}

#theme-toggle {
    padding: 0.5em 1em;
    border: 1px solid var(--header-color-dark);
    background-color: transparent;
    color: var(--header-color-dark);
    cursor: pointer;
    border-radius: 5px;
}

body.light-mode #theme-toggle {
    border: 1px solid var(--header-color-light);
    color: var(--header-color-light);
}

main {
    padding: 2em;
}

#search-form {
    display: flex;
    justify-content: center;
    margin-bottom: 2em;
}

#search-form input {
    width: 300px;
    padding: 0.5em;
    font-size: 1em;
}

#search-form button {
    padding: 0.5em 1em;
    font-size: 1em;
    cursor: pointer;
    border: 1px solid var(--header-color-dark);
    background-color: var(--header-color-dark);
    color: var(--bg-color-dark);
}

body.light-mode #search-form button {
    border: 1px solid var(--header-color-light);
    background-color: var(--header-color-light);
    color: var(--bg-color-light);
}

#zodiac-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5em;
}

.zodiac-card {
    background-color: var(--card-bg-color-dark);
    border: 1px solid var(--border-color-dark);
    border-radius: 10px;
    padding: 1.5em;
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s;
}

body.light-mode .zodiac-card {
    background-color: var(--card-bg-color-light);
    border: 1px solid var(--border-color-light);
}

.zodiac-card:hover {
    transform: scale(1.05);
}

.zodiac-card svg {
    width: 80px;
    height: 80px;
    color: var(--header-color-dark);
}

body.light-mode .zodiac-card svg {
    color: var(--header-color-light);
}

.zodiac-card h3 {
    margin: 0.5em 0 0;
    font-size: 1.2em;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.7);
}

.modal-content {
    background-color: var(--card-bg-color-dark);
    margin: 15% auto;
    padding: 2em;
    border: 1px solid var(--border-color-dark);
    border-radius: 10px;
    width: 80%;
    max-width: 500px;
    position: relative;
}

body.light-mode .modal-content {
    background-color: var(--card-bg-color-light);
    border: 1px solid var(--border-color-light);
}

.close-button {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.fortune-type-selection {
    margin-bottom: 2em;
    text-align: center;
}

.fortune-type-selection label {
    margin-right: 10px;
    font-size: 1.1em;
}

.fortune-type-selection select {
    padding: 0.5em;
    font-size: 1em;
    border: 1px solid var(--border-color-dark);
    background-color: var(--card-bg-color-dark);
    color: var(--text-color-dark);
}

body.light-mode .fortune-type-selection select {
    border: 1px solid var(--border-color-light);
    background-color: var(--card-bg-color-light);
    color: var(--text-color-light);
}

#modal-image {
    max-width: 100%;
    height: auto;
    margin-bottom: 1em;
    border-radius: 5px;
}