:root {
    --qualys-red: #ed1c24;
    --qualys-dark: #1a1a2e;
    --qualys-gray: #4a4a4a;
    --sidebar-bg: #1e1e2d;
    --sidebar-hover: #2a2a3d;
    --sidebar-active: #ed1c24;
    --content-bg: #ffffff;
    --border-color: #e0e0e0;
    --text-primary: #333333;
    --text-secondary: #666666;
    --link-color: #0066cc;
    --code-bg: #f5f7f9;
    --note-bg: #fff8e6;
    --note-border: #ffcc00;
    --important-bg: #fff0f0;
    --important-border: #ed1c24;
    --tip-bg: #e8f5e9;
    --tip-border: #4caf50;
}

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

html, body {
    height: 100%;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    display: flex;
    background: var(--content-bg);
}

.sidebar {
    width: 300px;
    min-width: 300px;
    background: var(--sidebar-bg);
    color: #fff;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 100;
    display: flex;
    flex-direction: column;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: var(--sidebar-bg);
}

.sidebar::-webkit-scrollbar-thumb {
    background: #444;
    border-radius: 3px;
}

.nav-header {
    padding: 20px;
    background: linear-gradient(135deg, var(--qualys-red) 0%, #c41920 100%);
    position: sticky;
    top: 0;
    z-index: 10;
}

.nav-header h1 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    line-height: 1.3;
}

.nav-header .subtitle {
    font-size: 11px;
    color: rgba(255,255,255,0.8);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-menu {
    list-style: none;
    padding: 10px 0;
    flex: 1;
}

.nav-section {
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.nav-section > .nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    color: rgba(255,255,255,0.9);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-section > .nav-link:hover {
    background: var(--sidebar-hover);
    color: #fff;
}

.nav-section > .nav-link.active {
    background: var(--sidebar-hover);
    border-left: 3px solid var(--qualys-red);
    padding-left: 17px;
}

.nav-link .icon {
    font-size: 10px;
    transition: transform 0.2s ease;
    opacity: 0.6;
}

.nav-section.expanded > .nav-link .icon {
    transform: rotate(90deg);
}

.nav-submenu {
    list-style: none;
    background: rgba(0,0,0,0.15);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.nav-section.expanded > .nav-submenu {
    max-height: 500px;
}

.nav-submenu li a {
    display: block;
    padding: 10px 20px 10px 35px;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 12px;
    transition: all 0.2s ease;
    border-left: 2px solid transparent;
}

.nav-submenu li a:hover {
    color: #fff;
    background: rgba(255,255,255,0.05);
}

.nav-submenu li a.active {
    color: #fff;
    background: rgba(237,28,36,0.2);
    border-left-color: var(--qualys-red);
}

.content {
    margin-left: 300px;
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.content-header {
    background: #f8f9fa;
    border-bottom: 1px solid var(--border-color);
    padding: 12px 40px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.breadcrumb {
    font-size: 12px;
    color: var(--text-secondary);
}

.breadcrumb a {
    color: var(--link-color);
    text-decoration: none;
}

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

.breadcrumb span {
    margin: 0 8px;
    color: #999;
}

.content-body {
    padding: 30px 40px 60px;
    max-width: 900px;
    flex: 1;
}

h1 {
    font-size: 28px;
    font-weight: 600;
    color: var(--qualys-dark);
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--qualys-red);
}

h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--qualys-dark);
    margin: 35px 0 15px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--qualys-dark);
    margin: 25px 0 12px;
}

h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--qualys-gray);
    margin: 20px 0 10px;
}

p {
    margin-bottom: 15px;
    color: var(--text-primary);
}

ul, ol {
    margin: 15px 0 15px 25px;
}

li {
    margin-bottom: 8px;
    color: var(--text-primary);
}

li ul, li ol {
    margin-top: 8px;
    margin-bottom: 8px;
}

a {
    color: var(--link-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

code {
    font-family: 'SF Mono', 'Consolas', 'Monaco', 'Menlo', monospace;
    font-size: 12px;
    background: var(--code-bg);
    padding: 2px 6px;
    border-radius: 3px;
    border: 1px solid var(--border-color);
    color: #c7254e;
}

pre {
    background: #1e1e2d;
    color: #e0e0e0;
    padding: 20px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 20px 0;
    font-size: 13px;
    line-height: 1.5;
}

pre code {
    background: none;
    border: none;
    padding: 0;
    color: inherit;
    font-size: inherit;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 13px;
}

thead {
    background: #f5f7f9;
}

th {
    padding: 12px 15px;
    text-align: left;
    font-weight: 600;
    color: var(--qualys-dark);
    border: 1px solid var(--border-color);
}

td {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    vertical-align: top;
}

tr:nth-child(even) {
    background: #fafbfc;
}

.note, .important, .tip {
    padding: 15px 20px;
    margin: 20px 0;
    border-radius: 4px;
    border-left: 4px solid;
}

.note {
    background: var(--note-bg);
    border-color: var(--note-border);
}

.important {
    background: var(--important-bg);
    border-color: var(--important-border);
}

.tip {
    background: var(--tip-bg);
    border-color: var(--tip-border);
}

.note-title {
    font-weight: 600;
    margin-bottom: 5px;
    font-size: 13px;
}

.note .note-title { color: #856404; }
.important .note-title { color: var(--qualys-red); }
.tip .note-title { color: #2e7d32; }

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 25px 0;
}

.feature-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    transition: all 0.2s ease;
}

.feature-card:hover {
    border-color: var(--qualys-red);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.feature-card h4 {
    color: var(--qualys-red);
    margin: 0 0 10px;
    font-size: 15px;
}

.feature-card p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.feature-card a {
    font-size: 13px;
    font-weight: 500;
}

.next-steps {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 25px;
    margin-top: 40px;
}

.next-steps h3 {
    margin: 0 0 15px;
    color: var(--qualys-dark);
    font-size: 15px;
}

.next-steps ul {
    margin: 0;
    list-style: none;
}

.next-steps li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.next-steps li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--qualys-red);
}

.content-footer {
    background: #f8f9fa;
    border-top: 1px solid var(--border-color);
    padding: 20px 40px;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: auto;
}

@media (max-width: 1024px) {
    .sidebar {
        width: 260px;
        min-width: 260px;
    }
    .content {
        margin-left: 260px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .content {
        margin-left: 0;
    }
    .content-body {
        padding: 20px;
    }
}

pre .keyword { color: #c678dd; }
pre .string { color: #98c379; }
pre .comment { color: #5c6370; font-style: italic; }
pre .number { color: #d19a66; }
pre .function { color: #61afef; }