/* ellieOS - styles.css */

:root {
    /* Color Palette */
    --base: #e8e7e8;
    --secondary-base: #bdbdbd;
    --highlight-blue: #7AB8FF;
    --highlight-green: #8FD18E;
    --highlight-purple: #B8A7E0;
    --highlight-light-blue: #9EC7F8;
    --highlight-light-green: #A7D8BA;
    --highlight-light-purple: #CFC5E6;
    
    /* Windows 98/XP Grays */
    --gray-light: #dfdfdf;
    --gray-medium: #c0c0c0;
    --gray-dark: #808080;
    --gray-darkest: #000000;
    --white: #ffffff;
    --black: #000000;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'MS Sans Serif', 'Microsoft Sans Serif', Arial, sans-serif;
    font-size: 15px;
    background: var(--base);
    overflow: hidden;
}

.desktop {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Wallpaper */
.wallpaper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: calc(100% - 30px);
    background: linear-gradient(135deg, #0070C0 0%, #00B050 50%, #70AD47 100%);
    background-image: url('../media/wallpaper.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

/* Desktop Icons */
.desktop-icons {
    position: absolute;
    top: 10px;
    left: 10px;
    display: flex;
    flex-direction: column;
    gap: 60px;
    z-index: 10;
}

.desktop-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    width: 70px;
    cursor: pointer;
    user-select: none;
    padding: 4px;
    border-radius: 2px;
    transition: background-color 0.2s;
}

.desktop-icon:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.desktop-icon:active {
    background-color: rgba(255, 255, 255, 0.5);
}

.icon-img {
    font-size: 32px;
    filter: drop-shadow(1px 1px 0 rgba(0, 0, 0, 0.5));
}

.icon-label {
    color: white;
    font-size: 12px;
    text-align: center;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
    word-wrap: break-word;
}

/* Windows Container */
#windows-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: calc(100% - 30px);
    z-index: 100;
}

/* Window Styling - Windows 98/XP Style */
.window {
    position: absolute;
    display: flex;
    flex-direction: column;
    background: var(--base);
    border: 2px solid;
    border-color: var(--gray-light) var(--gray-darkest) var(--gray-darkest) var(--gray-light);
    box-shadow: inset 1px 1px 0 var(--white), inset -1px -1px 0 var(--gray-dark);
    min-width: 300px;
    min-height: 200px;
    font-family: 'MS Sans Serif', Arial, sans-serif;
    font-size: 14px;
    z-index: 1;
    resize: both;
    overflow: hidden;
}

.window.focused {
    z-index: 1000;
}

.window.focused .window-titlebar {
    background: linear-gradient(90deg, var(--highlight-blue) 0%, var(--highlight-light-blue) 100%);
}

.window-titlebar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2px 2px;
    background: linear-gradient(90deg, var(--secondary-base) 0%, var(--gray-medium) 100%);
    border-bottom: 2px solid;
    border-color: var(--gray-light) var(--gray-dark);
    height: 20px;
    cursor: move;
    user-select: none;
}

.window.focused .window-title {
    color: var(--white);
    font-weight: bold;
    text-shadow: 1px 1px 0 var(--gray-dark);
}

.window-title {
    padding: 0 2px;
    font-size: 15px;
    flex: 1;
    color: var(--gray-darkest);
}

.window-controls {
    display: flex;
    gap: 2px;
}

/* Windows 98 Button Style */
.window-btn {
    width: 16px;
    height: 14px;
    padding: 0;
    border: 2px solid;
    border-color: var(--gray-light) var(--gray-darkest) var(--gray-darkest) var(--gray-light);
    background: linear-gradient(135deg, var(--gray-light) 0%, var(--secondary-base) 100%);
    color: var(--gray-darkest);
    font-size: 13px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    transition: all 0.05s;
}

.window-btn:hover {
    border-color: var(--highlight-blue) var(--gray-darkest) var(--gray-darkest) var(--highlight-blue);
}

.window-btn:active {
    border-color: var(--gray-darkest) var(--gray-light) var(--gray-light) var(--gray-darkest);
}

.window-btn.close-btn:hover {
    background: linear-gradient(135deg, #ff6b6b 0%, #ff4444 100%);
    color: white;
}

.window-content {
    flex: 1;
    padding: 4px;
    background: var(--base);
    overflow: auto;
    border: 2px solid;
    border-color: var(--gray-dark) var(--gray-light) var(--gray-light) var(--gray-dark);
    position: relative;
}

/* Taskbar */
.taskbar {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 28px;
    background: linear-gradient(to bottom, var(--secondary-base), var(--gray-medium));
    border-top: 2px solid;
    border-color: var(--white) var(--gray-dark) var(--gray-dark) var(--white);
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 2px 2px;
    box-shadow: inset 0 2px 0 var(--gray-light);
    z-index: 500;
}

.taskbar-start {
    display: flex;
    align-items: center;
}

.start-button {
    padding: 2px 8px;
    background: linear-gradient(135deg, var(--gray-light), var(--secondary-base));
    border: 2px solid;
    border-color: var(--gray-light) var(--gray-darkest) var(--gray-darkest) var(--gray-light);
    color: var(--gray-darkest);
    font-size: 15px;
    font-weight: bold;
    cursor: pointer;
    font-family: 'MS Sans Serif', Arial, sans-serif;
    user-select: none;
}

.start-button:hover {
    background: linear-gradient(135deg, var(--highlight-blue), var(--highlight-light-blue));
    color: white;
}

.start-button:active {
    border-color: var(--gray-darkest) var(--gray-light) var(--gray-light) var(--gray-darkest);
}

.taskbar-apps {
    display: flex;
    gap: 2px;
    flex: 1;
    align-items: center;
    overflow-x: auto;
    padding: 0 4px;
}

.taskbar-item {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 2px 6px;
    background: linear-gradient(135deg, var(--gray-light), var(--secondary-base));
    border: 2px solid;
    border-color: var(--gray-light) var(--gray-darkest) var(--gray-darkest) var(--gray-light);
    color: var(--gray-darkest);
    font-size: 15px;
    cursor: pointer;
    font-family: 'MS Sans Serif', Arial, sans-serif;
    user-select: none;
    white-space: nowrap;
    transition: all 0.1s;
}

.taskbar-item:hover {
    background: linear-gradient(135deg, var(--highlight-blue), var(--highlight-light-blue));
    color: white;
    border-color: var(--highlight-light-blue) var(--gray-darkest) var(--gray-darkest) var(--highlight-light-blue);
}

.taskbar-item.active {
    background: linear-gradient(135deg, var(--highlight-blue), var(--highlight-light-blue));
    color: white;
    border-color: var(--gray-darkest) var(--gray-light) var(--gray-light) var(--gray-darkest);
}

.taskbar-icon {
    font-size: 14px;
}

.taskbar-label {
    font-size: 15px;
}

.taskbar-tray {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
    padding: 0 4px;
    border-left: 2px solid var(--gray-dark);
}

.tray-clock {
    font-size: 15px;
    color: var(--gray-darkest);
    font-family: 'MS Sans Serif', Arial, sans-serif;
    min-width: 40px;
    text-align: right;
}

/* Terminal/Notepad Style Content */
.terminal {
    background: var(--base);
    color: var(--gray-darkest);
    font-family: 'Courier New', monospace;
    padding: 12px;
    border: none;
    min-height: 250px;
    overflow-y: auto;
    line-height: 1.6;
    font-size: 16px;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.terminal.home-terminal {
    background: var(--base);
    color: var(--gray-darkest);
}

.terminal.easter-egg {
    background: var(--base);
    color: var(--highlight-purple);
}

.terminal-input {
    width: calc(100% - 16px);
    padding: 6px 8px;
    font-family: 'Courier New', monospace;
    font-size: 15px;
    border: 2px inset;
    border-color: var(--gray-dark) var(--gray-light);
    background: white;
    color: var(--highlight-blue);
    outline: none;
}

.terminal-input::placeholder {
    color: var(--highlight-green);
}

.terminal-input:focus {
    border-color: var(--highlight-blue) var(--highlight-light-blue);
}

.terminal-line {
    margin: 2px 0;
    word-wrap: break-word;
}

.cursor {
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
}

/* Scrollbar styling - Windows XP style */
::-webkit-scrollbar {
    width: 18px;
    height: 18px;
}

::-webkit-scrollbar-track {
    background: var(--base);
    border: 2px solid;
    border-color: var(--gray-darkest) var(--gray-light) var(--gray-light) var(--gray-darkest);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--gray-light), var(--secondary-base));
    border: 2px solid;
    border-color: var(--gray-light) var(--gray-darkest) var(--gray-darkest) var(--gray-light);
    position: relative;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--highlight-blue), var(--highlight-light-blue));
}

::-webkit-scrollbar-button {
    background: linear-gradient(135deg, var(--gray-light), var(--secondary-base));
    border: 2px solid;
    border-color: var(--gray-light) var(--gray-darkest) var(--gray-darkest) var(--gray-light);
    height: 18px;
    width: 18px;
}

::-webkit-scrollbar-button:vertical:decrement {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><path d="M8 5 L4 9 L12 9 Z" fill="%23000"/></svg>');
    background-repeat: no-repeat;
    background-position: center;
}

::-webkit-scrollbar-button:vertical:increment {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><path d="M8 11 L4 7 L12 7 Z" fill="%23000"/></svg>');
    background-repeat: no-repeat;
    background-position: center;
}

::-webkit-scrollbar-button:horizontal:decrement {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><path d="M5 8 L9 4 L9 12 Z" fill="%23000"/></svg>');
    background-repeat: no-repeat;
    background-position: center;
}

::-webkit-scrollbar-button:horizontal:increment {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><path d="M11 8 L7 4 L7 12 Z" fill="%23000"/></svg>');
    background-repeat: no-repeat;
    background-position: center;
}

/* Notepad specific styling */
.notepad-content {
    padding: 8px;
    background: var(--base);
}

.notepad-copy-btn {
    padding: 6px 12px;
    background: linear-gradient(135deg, var(--highlight-blue), var(--highlight-light-blue));
    border: 2px solid;
    border-color: var(--gray-light) var(--gray-darkest) var(--gray-darkest) var(--gray-light);
    color: white;
    font-size: 11px;
    font-weight: bold;
    cursor: pointer;
    font-family: 'MS Sans Serif', Arial, sans-serif;
    transition: all 0.1s;
}

.notepad-copy-btn:hover {
    background: linear-gradient(135deg, var(--highlight-light-blue), var(--highlight-blue));
}

.notepad-copy-btn:active {
    border-color: var(--gray-darkest) var(--gray-light) var(--gray-light) var(--gray-darkest);
}

/* Projects Page Styles */
.projects-page {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    background: var(--base);
}

.explorer-toolbar {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px;
    background: linear-gradient(to right, var(--secondary-base), var(--gray-medium));
    border-bottom: 2px solid;
    border-color: var(--gray-light) var(--gray-dark);
}

.toolbar-btn {
    padding: 4px 8px;
    background: linear-gradient(135deg, var(--gray-light), var(--secondary-base));
    border: 2px solid;
    border-color: var(--gray-light) var(--gray-darkest) var(--gray-darkest) var(--gray-light);
    font-size: 15px;
    cursor: pointer;
    font-family: 'MS Sans Serif', Arial, sans-serif;
}

.toolbar-btn:hover {
    background: linear-gradient(135deg, var(--highlight-blue), var(--highlight-light-blue));
    color: white;
}

.toolbar-btn:active {
    border-color: var(--gray-darkest) var(--gray-light) var(--gray-light) var(--gray-darkest);
}

.toolbar-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.projects-content {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    background: linear-gradient(135deg, rgba(122, 184, 255, 0.05), rgba(143, 209, 142, 0.05));
}

.projects-intro {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px dashed var(--gray-medium);
}

.projects-intro h2 {
    font-size: 24px;
    color: var(--gray-darkest);
    margin: 0 0 8px 0;
}

.projects-intro p {
    font-size: 16px;
    color: var(--gray-dark);
    margin: 0;
}

.case-study-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.case-study-card {
    background: white;
    border: 3px solid var(--gray-medium);
    padding: 0;
    transition: all 0.2s;
    box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.1);
}

.case-study-card:hover {
    border-color: var(--highlight-blue);
    box-shadow: 4px 4px 0 rgba(122, 184, 255, 0.3);
}

.case-study-header {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 20px;
    padding: 20px;
    background: linear-gradient(135deg, rgba(122, 184, 255, 0.1), rgba(143, 209, 142, 0.1));
    border-bottom: 2px solid var(--gray-medium);
}

.case-study-image {
    width: 100%;
    height: 200px;
    background: var(--gray-light);
    background-size: cover;
    background-position: center;
    border: 2px solid var(--gray-medium);
}

.case-study-meta h3 {
    font-size: 22px;
    color: var(--gray-darkest);
    margin: 0 0 12px 0;
}

.case-study-meta p {
    margin-top: 12px;
    font-size: 15px;
    color: var(--gray-dark);
}

.case-study-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    background: var(--highlight-blue);
    color: white;
    padding: 4px 12px;
    font-size: 15px;
    border: 2px solid var(--highlight-light-blue);
    font-weight: bold;
}

.case-study-body {
    padding: 20px;
}

.case-study-section {
    margin-bottom: 20px;
}

.case-study-section h4 {
    font-size: 16px;
    color: var(--highlight-blue);
    margin: 0 0 8px 0;
    font-weight: bold;
}

.case-study-section p {
    font-size: 16px;
    color: var(--gray-darkest);
    line-height: 1.6;
    margin: 0;
}

.case-study-actions {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 2px dashed var(--gray-medium);
}

.action-btn {
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--highlight-blue), var(--highlight-light-blue));
    border: 2px solid;
    border-color: var(--gray-light) var(--gray-darkest) var(--gray-darkest) var(--gray-light);
    color: white;
    font-size: 15px;
    font-weight: bold;
    cursor: pointer;
    font-family: 'MS Sans Serif', Arial, sans-serif;
}

.action-btn:hover {
    background: linear-gradient(135deg, var(--highlight-light-blue), var(--highlight-blue));
}

.action-btn:active {
    border-color: var(--gray-darkest) var(--gray-light) var(--gray-light) var(--gray-darkest);
}

@media (max-width: 768px) {
    .case-study-header {
        grid-template-columns: 1fr;
    }
}

/* Blog Styles */
.ie-toolbar {
    background: linear-gradient(to bottom, #efefef, #dfdfdf);
    padding: 4px;
    border-bottom: 2px solid;
    border-color: var(--gray-light) var(--gray-dark);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.toolbar-buttons {
    display: flex;
    gap: 2px;
}

.ie-btn {
    padding: 4px 8px;
    background: linear-gradient(135deg, var(--gray-light), var(--secondary-base));
    border: 2px solid;
    border-color: var(--gray-light) var(--gray-darkest) var(--gray-darkest) var(--gray-light);
    font-size: 14px;
    cursor: pointer;
    font-family: 'MS Sans Serif', Arial, sans-serif;
    user-select: none;
}

.ie-btn:hover {
    background: linear-gradient(135deg, var(--highlight-blue), var(--highlight-light-blue));
    color: white;
}

.ie-btn:active {
    border-color: var(--gray-darkest) var(--gray-light) var(--gray-light) var(--gray-darkest);
}

.address-bar {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0 4px;
}

.address-label {
    font-size: 14px;
    font-weight: bold;
    color: var(--gray-darkest);
    white-space: nowrap;
}

.address-bar input {
    flex: 1;
    padding: 4px 6px;
    border: 2px inset;
    border-color: var(--gray-dark) var(--gray-light);
    font-family: 'MS Sans Serif', Arial, sans-serif;
    font-size: 14px;
    background: white;
    color: var(--gray-darkest);
}

.blog-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: linear-gradient(135deg, rgba(122, 184, 255, 0.1), rgba(143, 209, 142, 0.1));
}

.blog-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 4px dashed var(--gray-medium);
}

.blog-header h1 {
    font-size: 32px;
    font-weight: bold;
    color: var(--gray-darkest);
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.blog-subtitle {
    font-size: 16px;
    color: var(--gray-dark);
    font-style: italic;
    margin: 0;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.blog-card {
    background: white;
    border: 4px solid var(--gray-medium);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.1);
}

.blog-card:hover {
    box-shadow: 4px 4px 0 rgba(122, 184, 255, 0.3);
    border-color: var(--highlight-blue);
}

.card-image {
    width: 100%;
    height: 150px;
    background: linear-gradient(135deg, var(--highlight-blue), var(--highlight-green));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    border-bottom: 2px solid var(--gray-medium);
}

.card-content {
    padding: 12px;
}

.card-date {
    font-size: 15px;
    color: var(--gray-dark);
    font-family: 'MS Sans Serif', Arial, sans-serif;
    margin-bottom: 4px;
}

.blog-card h2 {
    font-size: 18px;
    font-weight: bold;
    color: var(--gray-darkest);
    margin: 0 0 8px 0;
    line-height: 1.3;
}

.blog-card p {
    font-size: 15px;
    color: var(--gray-dark);
    line-height: 1.4;
    margin: 0 0 8px 0;
}

.read-more {
    font-size: 15px;
    color: var(--highlight-blue);
    text-decoration: none;
    font-weight: bold;
}

.read-more:hover {
    text-decoration: underline;
}

.ie-status {
    background: linear-gradient(to right, var(--secondary-base), var(--gray-medium));
    border-top: 2px solid var(--gray-light);
    padding: 2px 4px;
    font-size: 14px;
    color: var(--gray-darkest);
}

/* Blog Post Modal */
.blog-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    justify-content: center;
    align-items: center;
    z-index: 10000;
}

.blog-modal-content {
    background: white;
    width: 80%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 30px;
    border: 4px solid var(--gray-medium);
    box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.3);
    position: relative;
}

.blog-close-btn {
    position: sticky;
    top: 0;
    right: 0;
    float: right;
    padding: 6px 12px;
    background: linear-gradient(135deg, var(--highlight-purple), var(--highlight-light-purple));
    border: 2px solid;
    border-color: var(--gray-light) var(--gray-darkest) var(--gray-darkest) var(--gray-light);
    color: white;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    font-family: 'MS Sans Serif', Arial, sans-serif;
    margin-bottom: 20px;
}

.blog-close-btn:hover {
    background: linear-gradient(135deg, var(--highlight-light-purple), var(--highlight-purple));
}

.blog-close-btn:active {
    border-color: var(--gray-darkest) var(--gray-light) var(--gray-light) var(--gray-darkest);
}

#blog-post-content {
    font-size: 16px;
    color: var(--gray-darkest);
    line-height: 1.8;
}

#blog-post-content h1 {
    font-size: 28px;
    margin-bottom: 16px;
}

#blog-post-content h3 {
    font-size: 20px;
    margin-top: 20px;
    margin-bottom: 10px;
}

#blog-post-content p {
    margin-bottom: 12px;
    font-size: 16px;
}

#blog-post-content a {
    color: var(--highlight-blue);
    text-decoration: underline;
}

#blog-post-content a:hover {
    color: var(--highlight-light-blue);
}

/* Blog Article Styles */
.blog-article {
    font-size: 16px;
    color: var(--gray-darkest);
    line-height: 1.8;
    padding: 20px 0;
}

.blog-article h2 {
    font-size: 28px;
    color: var(--highlight-blue);
    margin-bottom: 16px;
    margin-top: 24px;
    font-weight: bold;
}

.blog-article h3 {
    font-size: 20px;
    color: var(--gray-darkest);
    margin-top: 24px;
    margin-bottom: 12px;
    font-weight: bold;
}

.blog-article p {
    margin-bottom: 16px;
    font-size: 16px;
    color: var(--gray-darkest);
    line-height: 1.8;
}

.blog-article .image-container {
    text-align: center;
    margin: 24px 0;
}

.blog-article img {
    border: 2px solid var(--gray-medium);
    box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.1);
}

/* Table of Contents */
.toc-container {
    position: sticky;
    top: 20px;
    width: 220px;
    max-height: calc(100vh - 200px);
    overflow-y: auto;
    background: white;
    border: 3px solid var(--gray-medium);
    padding: 16px;
    box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.1);
}

.toc-title {
    font-size: 16px;
    font-weight: bold;
    color: var(--gray-darkest);
    margin: 0 0 12px 0;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--gray-medium);
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-item {
    margin-bottom: 8px;
}

.toc-link {
    display: block;
    padding: 6px 8px;
    font-size: 14px;
    color: var(--gray-darkest);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.2s;
}

.toc-link:hover {
    background: rgba(122, 184, 255, 0.1);
    border-left-color: var(--highlight-blue);
}

.toc-link.active {
    background: rgba(122, 184, 255, 0.2);
    border-left-color: var(--highlight-blue);
    color: var(--highlight-blue);
    font-weight: bold;
}

/* Back to Top Button */
.back-to-top {
    position: sticky;
    bottom: 20px;
    margin: 20px auto 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--highlight-blue), var(--highlight-light-blue));
    border: 3px solid;
    border-color: var(--gray-light) var(--gray-darkest) var(--gray-darkest) var(--gray-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    z-index: 100;
    transition: all 0.2s;
}

.back-to-top:hover {
    background: linear-gradient(135deg, var(--highlight-light-blue), var(--highlight-blue));
    transform: translateY(-2px);
    box-shadow: 3px 3px 6px rgba(0, 0, 0, 0.4);
}

.back-to-top:active {
    border-color: var(--gray-darkest) var(--gray-light) var(--gray-light) var(--gray-darkest);
    transform: translateY(0);
}

.back-to-top::before {
    content: '↑';
    font-size: 24px;
    color: white;
    font-weight: bold;
}

/* Case study with TOC layout */
.case-study-with-toc {
    display: flex;
    gap: 32px;
    align-items: flex-start;
}

.case-study-main {
    flex: 1;
    min-width: 0;
}