:root {
    /* Palette from logo */
    --color-primary: #fac515;
    --color-primary-hover: #e0b013;
    --color-dark-brown: #572e18;
    --color-cream: #f2f6d3;
    --color-slate-blue: #5e7e96;
    --color-light-slate: #95a8c0;

    /* Light Theme */
    --bg-main: #ffffff;
    --bg-sidebar: rgba(242, 246, 211, 0.85); /* Glassmorphism over cream */
    --text-main: #333333;
    --text-muted: #666666;
    --border-color: rgba(94, 126, 150, 0.2);
    --bg-code: #f6f8fa;
    --bg-hover: rgba(250, 197, 21, 0.15);
    
    /* Layout */
    --sidebar-width: 280px;
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-main: #121212;
    --bg-sidebar: rgba(30, 30, 30, 0.85);
    --text-main: #e0e0e0;
    --text-muted: #a0a0a0;
    --border-color: rgba(255, 255, 255, 0.1);
    --bg-code: #1e1e1e;
    --bg-hover: rgba(250, 197, 21, 0.2);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    color: var(--text-main);
}

/* Layout Wrapper */
.layout-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-right: 1px solid var(--border-color);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    z-index: 100;
}

.sidebar-header {
    padding: 2rem 1.5rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header .logo {
    max-width: 120px;
    border-radius: 12px;
    margin-bottom: 1rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.sidebar-header .logo:hover {
    transform: scale(1.05);
}

.sidebar-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-dark-brown);
}

[data-theme="dark"] .sidebar-header h2 {
    color: var(--color-primary);
}

/* Navigation */
.nav-links {
    padding: 1.5rem 1rem;
    flex-grow: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--text-main);
    text-decoration: none;
    border-radius: 8px;
    margin-bottom: 0.25rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-item i {
    margin-right: 0.75rem;
    font-size: 1.25rem;
    color: var(--color-slate-blue);
    transition: color 0.2s ease;
}

[data-theme="dark"] .nav-item i {
    color: var(--color-light-slate);
}

.nav-item:hover {
    background-color: var(--bg-hover);
    color: var(--color-dark-brown);
    transform: translateX(4px);
}

[data-theme="dark"] .nav-item:hover {
    color: var(--color-primary);
}

.nav-item.active {
    background-color: var(--color-primary);
    color: var(--color-dark-brown);
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(250, 197, 21, 0.3);
}

.nav-item.active i {
    color: var(--color-dark-brown);
}

/* Sub-items navigation */
.nav-group {
    margin-bottom: 0.25rem;
}

.nav-group-btn {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1rem;
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.nav-group-btn i {
    margin-right: 0.75rem;
    font-size: 1.25rem;
    color: var(--color-slate-blue);
}

[data-theme="dark"] .nav-group-btn i {
    color: var(--color-light-slate);
}

.nav-group-btn .group-icon {
    margin-left: auto;
    margin-right: 0;
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.nav-group.open .group-icon {
    transform: rotate(180deg);
}

.nav-group-btn:hover {
    background-color: var(--bg-hover);
}

.nav-group-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    padding-left: 1.5rem;
}

.nav-group.open .nav-group-content {
    max-height: 500px; /* Arbitrary large number */
    transition: max-height 0.5s ease-in;
    margin-top: 0.25rem;
    margin-bottom: 0.5rem;
}

.nav-item.sub-item {
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
}

/* Theme Toggle */
.theme-toggle {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

#theme-btn {
    width: 100%;
    padding: 0.75rem;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-main);
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

#theme-btn:hover {
    background-color: var(--bg-hover);
    border-color: var(--color-primary);
}

/* Main Content Area */
.main-content {
    flex-grow: 1;
    margin-left: var(--sidebar-width);
    padding: 3rem 4rem;
    max-width: calc(100% - var(--sidebar-width));
    min-height: 100vh;
}

/* Loader */
.loader {
    display: none;
    justify-content: center;
    align-items: center;
    height: 50vh;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Markdown Content Styling */
.markdown-body {
    max-width: 900px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.5s forwards;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.markdown-body h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-primary);
}

.markdown-body h2 {
    font-size: 1.75rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.markdown-body h3 {
    font-size: 1.3rem;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.markdown-body p, .markdown-body ul, .markdown-body ol {
    margin-bottom: 1.25rem;
}

.markdown-body ul, .markdown-body ol {
    padding-left: 2rem;
}

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

.markdown-body a {
    color: var(--color-slate-blue);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

[data-theme="dark"] .markdown-body a {
    color: var(--color-primary);
}

.markdown-body a:hover {
    border-bottom-color: currentColor;
}

.markdown-body code {
    background-color: var(--bg-code);
    padding: 0.2em 0.4em;
    border-radius: 6px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
}

.markdown-body pre {
    background-color: var(--bg-code);
    padding: 1.25rem;
    border-radius: 12px;
    overflow-x: auto;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.markdown-body pre code {
    background-color: transparent;
    padding: 0;
    border-radius: 0;
    color: inherit;
}

.markdown-body blockquote {
    border-left: 4px solid var(--color-primary);
    padding-left: 1rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-style: italic;
    background-color: var(--bg-hover);
    padding: 1rem;
    border-radius: 0 8px 8px 0;
}

.markdown-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1.5rem 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Mobile Menu Button */
#mobile-menu-btn {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 200;
    background-color: var(--color-primary);
    color: var(--color-dark-brown);
    border: none;
    border-radius: 8px;
    width: 44px;
    height: 44px;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

/* Responsive */
@media (max-width: 768px) {
    #mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 24px rgba(0,0,0,0.2);
    }
    
    .main-content {
        margin-left: 0;
        max-width: 100%;
        padding: 4rem 1.5rem 2rem;
    }
}