:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --primary-color: #007bff;
    --border-color: #cccccc;
    --input-bg: #f8f9fa;
    --header-bg: #f1f1f1;
    --button-bg: #e0e0e0;
    --button-hover-bg: #d4d4d4;
    --required-color: #dc3545;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --primary-color: #58a6ff;
    --border-color: #444444;
    --input-bg: #2a2a2a;
    --header-bg: #252525;
    --button-bg: #3a3a3a;
    --button-hover-bg: #4a4a4a;
}

[data-theme="blue-light"] {
    --bg-color: #fdf6e3;
    --text-color: #654b23;
    --primary-color: #cb4b16;
    --border-color: #93a1a1;
    --input-bg: #eee8d5;
    --header-bg: #f5ead5;
    --button-bg: #e9e0cb;
    --button-hover-bg: #dcd3be;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin: 0;
}

.theme-selector {
    display: flex;
}

/* --- THEME ICON STYLES START --- */
.theme-selector button {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    cursor: pointer;
    margin-left: 10px;
    background-color: var(--text-color); /* Use text color to paint the icon */
    -webkit-mask-size: 65%;
    mask-size: 65%;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    transition: transform 0.2s;
}
.theme-selector button:hover {
    transform: scale(1.1);
}

#light-theme {
    -webkit-mask-image: url(icons/sun.svg);
    mask-image: url(icons/sun.svg);
}
#dark-theme {
    -webkit-mask-image: url(icons/moon.svg);
    mask-image: url(icons/moon.svg);
}
#blue-light-theme {
    -webkit-mask-image: url(icons/eclipse.svg);
    mask-image: url(icons/eclipse.svg);
}
/* --- THEME ICON STYLES END --- */


#info-section {
    margin: 20px 0;
    padding: 15px;
    background-color: var(--input-bg);
    border-left: 4px solid var(--primary-color);
    border-radius: 4px;
}

main {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.form-container, .preview-container {
    flex: 1;
    min-width: 300px;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.required {
    color: var(--required-color);
}

input[type="text"], input[type="url"], input[type="date"], input[type="email"], textarea, select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
    box-sizing: border-box;
    font-size: 1rem;
}

textarea {
    resize: vertical;
}

#authors-container .author-entry {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin-bottom: 10px;
    align-items: center;
    position: relative;
    border: 1px solid var(--border-color);
    padding: 15px;
    border-radius: 4px;
}
#authors-container .author-entry input {
    margin: 0;
}

#authors-container .author-entry .remove-author {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 25px;
    height: 25px;
    border: none;
    background: transparent;
    color: var(--required-color);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

button {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--button-bg);
    color: var(--text-color);
    cursor: pointer;
    transition: background-color 0.2s;
    font-size: 1rem;
}

button:hover {
    background-color: var(--button-hover-bg);
}

#add-author {
    margin-top: 10px;
    margin-bottom: 15px;
}

.preview-container h2 {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

#preview {
    background-color: var(--input-bg);
    padding: 15px;
    border-radius: 4px;
    white-space: pre-wrap;
    word-wrap: break-word;
    min-height: 200px;
    border: 1px solid var(--border-color);
    font-family: "Courier New", Courier, monospace;
}

.preview-actions {
    margin-top: 15px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.hidden {
    display: none;
}

#license-custom, #message-custom {
    margin-top: 10px;
}

@media (max-width: 768px) {
    body {
        padding: 15px;
    }
    header {
        align-items: flex-start;
    }
    h1 {
        margin-bottom: 15px;
    }
    .theme-selector {
        margin-left: -10px;
    }
    main {
        flex-direction: column;
    }
}

@media (min-width: 500px) {
    #authors-container .author-entry {
        grid-template-columns: 1fr 1fr;
        padding-right: 40px;
    }
    #authors-container .author-entry .author-affiliation,
    #authors-container .author-entry .author-orcid {
        grid-column: 1 / -1;
    }
}