/* General Body and Container Styles */
:root {
    /* Light Theme (default) */
    --bg-color: #fafafa;
    --text-color: #1a1a1a;
    --accent-color: #0066cc;
    --border-color: #e0e0e0;
    --input-bg: #ffffff;
    --input-border: #cccccc;
    --button-bg: var(--accent-color);
    --button-text: #ffffff;
    --button-hover-bg: #0056b3;
    --form-card-bg: #ffffff;

    /* Font Settings */
    --font-family: Georgia, Cambria, "Times New Roman", serif;
    --base-font-size: 18px;
    --line-height: 1.75;
    --paragraph-spacing: 1.5em;

    /* Article Widths */
    --narrow-width: 580px;
    --normal-width: 700px;
    --wide-width: 850px;
}

/* Dark Theme */
body.theme-dark {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --accent-color: #4d9fff;
    --border-color: #333333;
    --input-bg: #333333;
    --input-border: #666666;
    --button-bg: var(--accent-color);
    --button-text: #1a1a1a;
    --button-hover-bg: #6a9ee8;
    --form-card-bg: #2a2a2a;
}

/* Sepia Theme */
body.theme-sepia {
    --bg-color: #f4ecd8;
    --text-color: #5b4636;
    --accent-color: #8b6914;
    --border-color: #d1c7b1;
    --input-bg: #ffffff;
    --input-border: #a19a8e;
    --button-bg: var(--accent-color);
    --button-text: #ffffff;
    --button-hover-bg: #6e5410;
    --form-card-bg: #ffffff;
}

body {
    margin: 0;
    font-family: var(--font-family);
    font-size: var(--base-font-size);
    line-height: var(--line-height);
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: var(--normal-width); /* Default to normal width */
    margin-left: auto;
    margin-right: auto;
    padding: 20px; /* Responsive padding */
}

/* Adjust container padding for larger screens */
@media (min-width: 768px) {
    .container {
        padding: 40px;
    }
}

/* Header Styles */
.page-header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap; /* Allow wrapping on smaller screens */
}

.logo {
    margin: 0;
    font-size: 1.8em;
    color: var(--text-color);
    transition: color 0.3s ease;
}

.url-input-container {
    display: flex;
    flex-grow: 1;
    max-width: 500px;
    margin-left: 20px; /* Space between logo and input */
}

.url-input-container input[type="url"] {
    flex-grow: 1;
    padding: 10px 15px;
    border: 1px solid var(--input-border);
    border-radius: 4px 0 0 4px;
    font-size: 1em;
    background-color: var(--input-bg);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.url-input-container button {
    padding: 10px 20px;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 1px solid var(--button-bg);
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.url-input-container button:hover {
    background-color: var(--button-hover-bg);
    border-color: var(--button-hover-bg);
}

/* Responsive adjustments for header */
@media (max-width: 767px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }
    .url-input-container {
        margin-top: 10px;
        margin-left: 0;
        width: 100%;
    }
    .logo {
        width: 100%;
        text-align: center;
        margin-bottom: 10px;
    }
}

/* Toolbar Styles */
#toolbar {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
    position: sticky;
    top: 65px; /* Adjust based on header height */
    z-index: 999;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: background-color 0.3s ease, border-color 0.3s ease, top 0.3s ease;
}

.toolbar-content {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.toolbar-content button {
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 1px solid var(--button-bg);
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9em;
    transition: background-color 0.3s ease, border-color 0.3s ease, opacity 0.3s ease;
    min-width: 40px; /* For font size buttons */
}

.toolbar-content button:hover {
    background-color: var(--button-hover-bg);
    border-color: var(--button-hover-bg);
}

.toolbar-content span {
    padding: 8px 0;
    font-size: 0.9em;
    color: var(--text-color);
}

.toolbar-hidden {
    display: none;
}

.copy-feedback {
    margin-left: 10px;
    color: var(--accent-color);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.copy-feedback.show {
    opacity: 1;
}

/* Landing Page Styles */
.landing-page {
    text-align: center;
    padding: 50px 0;
}

.hero-section {
    margin-bottom: 40px;
}

.app-icon {
    font-size: 5em;
    display: block;
    margin-bottom: 20px;
}

.landing-page h2 {
    font-size: 2.5em;
    color: var(--text-color);
    margin-bottom: 15px;
}

.landing-page p {
    font-size: 1.2em;
    color: var(--text-color);
}

.form-card {
    background-color: var(--form-card-bg);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
    border: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-card h3 {
    margin-top: 0;
    font-size: 1.5em;
    color: var(--text-color);
}

#mainUrlForm {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
}

#mainUrlForm input[type="url"] {
    padding: 12px 15px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    font-size: 1.1em;
    background-color: var(--input-bg);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

#mainUrlForm button {
    padding: 12px 25px;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1.1em;
    transition: background-color 0.3s ease;
}

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

.example-text {
    margin-top: 25px;
    font-size: 0.9em;
    color: var(--text-color);
}

.example-text a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.example-text a:hover {
    text-decoration: underline;
}

/* Article View Styles */
.article-view {
    padding-top: 20px; /* Space below header/toolbar */
}

#articleContent {
    max-width: var(--normal-width); /* Default to normal width, overridden by JS */
    margin-left: auto;
    margin-right: auto;
    padding: 20px;
    line-height: var(--line-height);
    word-wrap: break-word;
}

#articleContent h1, #articleContent h2, #articleContent h3 {
    color: var(--text-color);
    margin-top: 1.5em;
    margin-bottom: 0.8em;
    line-height: 1.2;
}

#articleContent h1 {
    font-size: 2.5em;
    text-align: center;
    margin-bottom: 1em;
}

#articleContent h2 {
    font-size: 1.8em;
}

#articleContent h3 {
    font-size: 1.4em;
}

#articleContent p {
    margin-bottom: var(--paragraph-spacing);
}

#articleContent a {
    color: var(--accent-color);
    text-decoration: none;
}

#articleContent a:hover {
    text-decoration: underline;
}

#articleContent img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 2em auto;
    border-radius: 4px;
}

#articleContent blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: 1em;
    margin-left: 0;
    color: var(--text-color);
    font-style: italic;
}

#articleContent ul, #articleContent ol {
    margin-left: 1.5em;
    margin-bottom: var(--paragraph-spacing);
}

#articleContent pre {
    background-color: var(--input-bg); /* Use input background for code blocks */
    border: 1px solid var(--border-color);
    padding: 1em;
    border-radius: 4px;
    overflow-x: auto;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
    font-size: 0.9em;
}

#articleContent code {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
    background-color: var(--input-bg);
    padding: 0.2em 0.4em;
    border-radius: 3px;
}

/* Responsive adjustments for article content padding */
@media (max-width: 767px) {
    #articleContent {
        padding: 15px;
    }
}

/* Width classes for article content (set by JS) */
.width-narrow #articleContent {
    max-width: var(--narrow-width);
}

.width-normal #articleContent {
    max-width: var(--normal-width);
}

.width-wide #articleContent {
    max-width: var(--wide-width);
}


/* Utility Classes */
.hidden {
    display: none !important;
}

/* Loading Spinner */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 50px 0;
    color: var(--accent-color);
}

.spinner {
    border: 5px solid var(--border-color);
    border-top: 5px solid var(--accent-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin-bottom: 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Error Message */
.error-message {
    background-color: #ffe0e0;
    color: #cc0000;
    border: 1px solid #cc0000;
    padding: 20px;
    margin: 20px auto;
    border-radius: 8px;
    text-align: center;
    max-width: 600px;
    font-size: 1.1em;
}

body.theme-dark .error-message {
    background-color: #4d0000;
    color: #ffcccc;
    border-color: #ffcccc;
}

body.theme-sepia .error-message {
    background-color: #f7e7d3;
    color: #a0522d;
    border-color: #a0522d;
}