body {
    background: var(--bg-body);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

.ide-container {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
    height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
    z-index: 10;
    overflow-y: auto;
}

.sidebar.collapsed {
    width: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-20px);
    border-right: none;
}

.explorer-header {
    padding: 15px 20px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.file-item {
    padding: 8px 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: all 0.2s;
    border-left: 3px solid transparent;
    white-space: nowrap;
    overflow: hidden;
    text-decoration: none;
}

.file-item:hover {
    background: var(--hover-item);
    color: var(--accent);
    text-decoration: none;
}

.file-item.active {
    background: var(--hover-item);
    color: var(--text-main);
    border-left-color: var(--accent);
}

.file-item i {
    margin-right: 10px;
    width: 16px;
}

.editor-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-editor);
    min-width: 0;
    overflow: hidden;
}

.tab-bar {
    height: 40px;
    background: var(--bg-body);
    display: flex;
    align-items: flex-end;
    padding-left: 1px;
    flex-shrink: 0;
}

.tab {
    background: var(--bg-sidebar);
    color: var(--text-muted);
    padding: 10px 20px;
    font-size: 0.85rem;
    border-right: 1px solid var(--bg-body);
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 150px;
}

.tab.active {
    background: var(--bg-editor);
    color: var(--accent);
    border-top: 2px solid var(--accent);
}

.content-scroll {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 3rem;
    scrollbar-width: thin;
    scrollbar-color: var(--accent) transparent;
}

.content-scroll::-webkit-scrollbar {
    width: 8px;
}

.content-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.content-scroll::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 4px;
}

.content-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--accent-hover);
}

.markdown-body {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.markdown-body h1 {
    color: var(--text-main);
    margin-bottom: 1.5rem;
    font-size: 2.5rem;
}

.markdown-body h2 {
    color: var(--text-main);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
    font-size: 1.8rem;
}

.markdown-body h3 {
    color: var(--text-main);
    margin-top: 2rem;
    margin-bottom: 0.8rem;
    font-size: 1.4rem;
}

.markdown-body h4 {
    color: var(--text-main);
    margin-top: 1.5rem;
    margin-bottom: 0.6rem;
    font-size: 1.2rem;
}

.markdown-body h5 {
    color: var(--text-muted);
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.markdown-body p {
    color: var(--text-muted);
    margin-bottom: 1.2rem;
}

.markdown-body ul, .markdown-body ol {
    color: var(--text-muted);
    margin-bottom: 1.2rem;
    padding-left: 2rem;
}

.markdown-body li {
    margin-bottom: 0.5rem;
}

.markdown-body code {
    font-family: 'Fira Code', monospace;
    background: #0f172a;
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--accent);
    font-size: 0.9em;
}

.markdown-body pre {
    background: #0f172a;
    padding: 1.2rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    overflow-x: auto;
    margin: 1.5rem 0;
}

.markdown-body pre code {
    background: transparent;
    padding: 0;
    color: var(--text-light);
}

.markdown-body img {
    max-width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border);
    display: block;
    margin: 1.5rem auto;
}

.markdown-body a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

.markdown-body a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.markdown-body blockquote {
    border-left: 4px solid var(--accent);
    padding-left: 1rem;
    margin-left: 0;
    color: var(--text-light);
    font-style: italic;
}

.markdown-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.markdown-body table th,
.markdown-body table td {
    border: 1px solid var(--border);
    padding: 0.75rem;
    text-align: left;
}

.markdown-body table th {
    background: var(--bg-sidebar);
    color: var(--text-main);
    font-weight: 600;
}

.markdown-body table td {
    color: var(--text-muted);
}

.controls {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    z-index: 100;
}

.btn-ui {
    width: 3.5rem;
    height: 3.5rem;
    background: var(--accent);
    color: var(--bg-body);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

.btn-ui:hover {
    transform: scale(1.1);
    background: var(--accent-hover);
    color: white;
}

@media (max-width: 768px) {
    .sidebar {
        position: absolute;
        height: 100%;
        box-shadow: 10px 0 30px rgba(0, 0, 0, 0.5);
    }

    .content-scroll {
        padding: 2rem 1.5rem;
    }

    .tab-bar {
        display: none;
    }
    
    .markdown-body h1 {
        font-size: 2rem;
    }
    
    .markdown-body h2 {
        font-size: 1.5rem;
    }
}