/* ══════════════════════════════════════════════════════════════════════════════
   The IT Experience Knowledge Base — Master Stylesheet
   Brand: Navy + Teal | Clean | Professional | Modern Tech MSP
   ══════════════════════════════════════════════════════════════════════════════ */

/* ─── CSS Variables / Design Tokens ──────────────────────────────────────── */
:root {
    /* Brand Colors */
    --kb-navy: #0f1b2d;
    --kb-navy-light: #1a2b45;
    --kb-navy-mid: #243654;
    --kb-teal: #00b4d8;
    --kb-teal-dark: #0096b7;
    --kb-teal-light: #48cae4;
    --kb-teal-glow: rgba(0, 180, 216, 0.15);

    /* Surfaces */
    --kb-bg: #f5f7fa;
    --kb-surface: #ffffff;
    --kb-surface-hover: #f8fafc;
    --kb-surface-active: #eef2f7;
    --kb-border: #e2e8f0;
    --kb-border-light: #f1f5f9;

    /* Text */
    --kb-text: #1e293b;
    --kb-text-secondary: #64748b;
    --kb-text-muted: #94a3b8;
    --kb-text-inverse: #ffffff;

    /* Semantic */
    --kb-success: #10b981;
    --kb-warning: #f59e0b;
    --kb-danger: #ef4444;
    --kb-info: #3b82f6;

    /* Layout */
    --kb-max-width: 1200px;
    --kb-header-height: 72px;
    --kb-radius: 12px;
    --kb-radius-sm: 8px;
    --kb-radius-lg: 16px;

    /* Shadows */
    --kb-shadow-sm: 0 1px 2px rgba(15, 27, 45, 0.05);
    --kb-shadow: 0 1px 3px rgba(15, 27, 45, 0.08), 0 1px 2px rgba(15, 27, 45, 0.06);
    --kb-shadow-md: 0 4px 6px rgba(15, 27, 45, 0.07), 0 2px 4px rgba(15, 27, 45, 0.06);
    --kb-shadow-lg: 0 10px 15px rgba(15, 27, 45, 0.1), 0 4px 6px rgba(15, 27, 45, 0.05);
    --kb-shadow-xl: 0 20px 25px rgba(15, 27, 45, 0.1), 0 10px 10px rgba(15, 27, 45, 0.04);

    /* Typography */
    --kb-font-display: 'Plus Jakarta Sans', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --kb-font-body: 'Plus Jakarta Sans', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --kb-font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

    /* Transitions */
    --kb-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --kb-transition-slow: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Dark Mode ──────────────────────────────────────────────────────────── */
[data-theme="dark"] {
    --kb-bg: #0c1220;
    --kb-surface: #141e30;
    --kb-surface-hover: #1a2940;
    --kb-surface-active: #1e3050;
    --kb-border: #1e3050;
    --kb-border-light: #192640;
    --kb-text: #e2e8f0;
    --kb-text-secondary: #94a3b8;
    --kb-text-muted: #64748b;
    --kb-shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --kb-shadow: 0 1px 3px rgba(0,0,0,0.3);
    --kb-shadow-md: 0 4px 6px rgba(0,0,0,0.3);
    --kb-shadow-lg: 0 10px 15px rgba(0,0,0,0.3);
}

/* ─── Reset & Base ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--kb-font-body);
    color: var(--kb-text);
    background: var(--kb-bg);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--kb-teal-dark);
    text-decoration: none;
    transition: color var(--kb-transition);
}
a:hover { color: var(--kb-teal); }

img { max-width: 100%; height: auto; }

/* ─── Header ─────────────────────────────────────────────────────────────── */
.kb-header {
    background: var(--kb-navy);
    color: var(--kb-text-inverse);
    height: var(--kb-header-height);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}

.kb-header-inner {
    max-width: var(--kb-max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.kb-logo {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--kb-text-inverse);
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.02em;
    white-space: nowrap;
    flex-shrink: 0;
}

.kb-logo:hover { color: var(--kb-teal-light); }

.kb-logo-img {
    height: 36px;
    width: auto;
    display: block;
}

.kb-logo-divider {
    width: 1px;
    height: 28px;
    background: rgba(255,255,255,0.15);
}

.kb-logo-label {
    font-size: 0.8125rem;
    font-weight: 600;
    opacity: 0.7;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--kb-text-inverse);
}

.kb-logo-link {
    display: inline-flex;
    align-items: center;
    color: inherit;
    text-decoration: none;
    transition: opacity var(--kb-transition), color var(--kb-transition);
}
.kb-logo-link:hover { opacity: 1; color: var(--kb-teal-light); }
.kb-logo-link:focus-visible { outline: 2px solid var(--kb-teal-light); outline-offset: 3px; border-radius: 4px; }
a.kb-logo-label { opacity: 0.85; }
a.kb-logo-label:hover { opacity: 1; color: var(--kb-teal-light); }

.kb-header-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.kb-header-nav a {
    color: rgba(255,255,255,0.75);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: var(--kb-radius-sm);
    transition: all var(--kb-transition);
}

.kb-header-nav a:hover {
    color: #fff;
    background: rgba(255,255,255,0.08);
}

.kb-theme-toggle {
    background: rgba(255,255,255,0.08);
    border: none;
    color: rgba(255,255,255,0.75);
    width: 38px;
    height: 38px;
    border-radius: var(--kb-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--kb-transition);
}
.kb-theme-toggle:hover { background: rgba(255,255,255,0.15); color: #fff; }

/* Header Nav Buttons */
.kb-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 18px;
    border-radius: var(--kb-radius-sm);
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: all var(--kb-transition);
    white-space: nowrap;
    text-decoration: none;
}

.kb-nav-btn-outline {
    color: rgba(255,255,255,0.85);
    border: 1.5px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.04);
}
.kb-nav-btn-outline:hover {
    color: #fff;
    border-color: rgba(255,255,255,0.45);
    background: rgba(255,255,255,0.1);
}

.kb-nav-btn-primary {
    color: #fff;
    border: 1.5px solid var(--kb-teal);
    background: linear-gradient(135deg, var(--kb-teal), var(--kb-teal-dark));
    box-shadow: 0 2px 8px rgba(0, 180, 216, 0.3);
}
.kb-nav-btn-primary:hover {
    color: #fff;
    opacity: 0.92;
    box-shadow: 0 4px 12px rgba(0, 180, 216, 0.4);
    transform: translateY(-1px);
}

/* ─── Hero / Search Section ──────────────────────────────────────────────── */
.kb-hero {
    background: linear-gradient(170deg, var(--kb-navy) 0%, var(--kb-navy-light) 60%, var(--kb-navy-mid) 100%);
    padding: 56px 24px 64px;
    text-align: center;
    position: relative;
    overflow: visible;
}

.kb-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(ellipse 600px 400px at 20% 50%, rgba(0,180,216,0.08), transparent),
        radial-gradient(ellipse 400px 300px at 80% 30%, rgba(72,202,228,0.06), transparent);
    pointer-events: none;
}

.kb-hero h1 {
    font-family: var(--kb-font-display);
    color: var(--kb-text-inverse);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
    position: relative;
}

.kb-hero p {
    color: rgba(255,255,255,0.65);
    font-size: 1.0625rem;
    max-width: 520px;
    margin: 0 auto 32px;
    position: relative;
}

/* ─── Search Component ───────────────────────────────────────────────────── */
.kb-search-wrapper {
    max-width: 620px;
    margin: 0 auto;
    position: relative;
    z-index: 100;
}

.kb-search-box {
    display: flex;
    align-items: center;
    background: var(--kb-surface);
    border-radius: var(--kb-radius);
    box-shadow: var(--kb-shadow-lg);
    overflow: hidden;
    border: 2px solid transparent;
    transition: border-color var(--kb-transition), box-shadow var(--kb-transition);
}

.kb-search-box:focus-within {
    border-color: var(--kb-teal);
    box-shadow: var(--kb-shadow-xl), 0 0 0 4px var(--kb-teal-glow);
}

.kb-search-icon {
    display: flex;
    align-items: center;
    padding: 0 0 0 18px;
    color: var(--kb-text-muted);
}

.kb-search-input {
    flex: 1;
    border: none;
    background: none;
    padding: 16px 14px;
    font-size: 1rem;
    font-family: var(--kb-font-body);
    color: var(--kb-text);
    outline: none;
}

.kb-search-input::placeholder { color: var(--kb-text-muted); }

.kb-search-btn {
    background: linear-gradient(135deg, var(--kb-teal), var(--kb-teal-dark));
    color: white;
    border: none;
    padding: 12px 24px;
    margin: 6px;
    border-radius: var(--kb-radius-sm);
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all var(--kb-transition);
    font-family: var(--kb-font-body);
}
.kb-search-btn:hover { opacity: 0.9; transform: translateY(-1px); }

/* Autocomplete Dropdown */
.kb-autocomplete {
    position: absolute;
    top: calc(100% + 6px);
    left: 0; right: 0;
    background: var(--kb-surface);
    border-radius: var(--kb-radius);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
    border: 1px solid var(--kb-border);
    display: none;
    overflow: hidden;
    max-height: 400px;
    overflow-y: auto;
    z-index: 9999;
}

.kb-autocomplete.active { display: block; }

.kb-autocomplete-item {
    display: block;
    padding: 14px 18px;
    border-bottom: 1px solid var(--kb-border-light);
    transition: background var(--kb-transition);
    color: var(--kb-text);
}
.kb-autocomplete-item:last-child { border-bottom: none; }
.kb-autocomplete-item:hover, .kb-autocomplete-item.active {
    background: var(--kb-surface-hover);
    color: var(--kb-text);
}

.kb-autocomplete-item .ac-title {
    font-weight: 600;
    font-size: 0.9375rem;
    margin-bottom: 2px;
}

.kb-autocomplete-item .ac-cat {
    font-size: 0.75rem;
    color: var(--kb-teal);
    font-weight: 500;
}

.kb-autocomplete-item .ac-excerpt {
    font-size: 0.8125rem;
    color: var(--kb-text-secondary);
    margin-top: 2px;
}

/* ─── Page Layout ────────────────────────────────────────────────────────── */
.kb-container {
    max-width: var(--kb-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.kb-main {
    padding: 40px 0 80px;
}

.kb-section-title {
    font-family: var(--kb-font-display);
    font-size: 1.375rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--kb-text);
    margin-bottom: 24px;
}

/* ─── Category Cards (Homepage) ──────────────────────────────────────────── */
.kb-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
    margin-bottom: 48px;
    position: relative;
    z-index: 1;
}

.kb-category-card {
    background: var(--kb-surface);
    border-radius: var(--kb-radius);
    padding: 28px;
    border: 1px solid var(--kb-border);
    box-shadow: var(--kb-shadow-sm);
    transition: all var(--kb-transition-slow);
    display: flex;
    gap: 18px;
    color: var(--kb-text);
    cursor: pointer;
}

.kb-category-card:hover {
    border-color: var(--kb-teal);
    box-shadow: var(--kb-shadow-md), 0 0 0 3px var(--kb-teal-glow);
    transform: translateY(-2px);
    color: var(--kb-text);
}

.kb-category-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    min-width: 52px;
    background: var(--kb-teal-glow);
    color: var(--kb-teal);
    border-radius: var(--kb-radius-sm);
}

.kb-category-info h3 {
    font-family: var(--kb-font-display);
    font-size: 1.0625rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 6px;
}

.kb-category-info p {
    font-size: 0.875rem;
    color: var(--kb-text-secondary);
    line-height: 1.5;
    margin-bottom: 8px;
}

.kb-category-count {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--kb-teal);
}

/* ─── Article Lists ──────────────────────────────────────────────────────── */
.kb-article-list {
    list-style: none;
}

.kb-article-list-item {
    border-bottom: 1px solid var(--kb-border-light);
}

.kb-article-list-item a {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 6px;
    color: var(--kb-text);
    transition: all var(--kb-transition);
    border-radius: var(--kb-radius-sm);
}

.kb-article-list-item a:hover {
    background: var(--kb-surface-hover);
    color: var(--kb-teal);
    padding-left: 12px;
}

.kb-article-list-item .al-icon {
    color: var(--kb-text-muted);
    flex-shrink: 0;
}

.kb-article-list-item .al-title {
    font-weight: 600;
    font-size: 0.9375rem;
    flex: 1;
}

.kb-article-list-item .al-meta {
    font-size: 0.75rem;
    color: var(--kb-text-muted);
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

/* ─── Article Page Layout ────────────────────────────────────────────────── */
.kb-article-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 40px;
    align-items: start;
}

@media (max-width: 900px) {
    .kb-article-layout { grid-template-columns: 1fr; }
    .kb-article-sidebar { position: static; order: 1; }
}

/* ─── Breadcrumbs ────────────────────────────────────────────────────────── */
.kb-breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8125rem;
    color: var(--kb-text-muted);
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.kb-breadcrumbs a { color: var(--kb-text-secondary); font-weight: 500; }
.kb-breadcrumbs a:hover { color: var(--kb-teal); }
.kb-breadcrumbs .sep { opacity: 0.4; }

/* ─── Article Content ────────────────────────────────────────────────────── */
.kb-article-content {
    background: var(--kb-surface);
    border-radius: var(--kb-radius);
    border: 1px solid var(--kb-border);
    padding: 40px;
    box-shadow: var(--kb-shadow-sm);
}

@media (max-width: 600px) {
    .kb-article-content { padding: 24px 18px; }
}

.kb-article-header { margin-bottom: 32px; }

.kb-article-header h1 {
    font-family: var(--kb-font-display);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.25;
    margin-bottom: 16px;
}

.kb-article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.8125rem;
    color: var(--kb-text-muted);
    flex-wrap: wrap;
}

.kb-article-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.kb-article-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 16px; }

.kb-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: var(--kb-teal-glow);
    color: var(--kb-teal-dark);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Article body typography */
.kb-article-body {
    font-size: 0.9625rem;
    line-height: 1.75;
    color: var(--kb-text);
}

.kb-article-body h1,
.kb-article-body h2,
.kb-article-body h3,
.kb-article-body h4 {
    font-family: var(--kb-font-display);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-top: 2em;
    margin-bottom: 0.75em;
    scroll-margin-top: calc(var(--kb-header-height) + 20px);
}

.kb-article-body h2 { font-size: 1.375rem; }
.kb-article-body h3 { font-size: 1.125rem; }
.kb-article-body h4 { font-size: 1rem; }

.kb-article-body p { margin-bottom: 1em; }

.kb-article-body .article-image {
    border-radius: var(--kb-radius-sm);
    border: 1px solid var(--kb-border);
    margin: 1.5em 0;
    box-shadow: var(--kb-shadow);
}

.kb-article-body .article-link {
    color: var(--kb-teal-dark);
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.kb-article-body .article-list,
.kb-article-body .article-list-ordered,
.kb-article-body ul,
.kb-article-body ol {
    margin: 1em 0;
    padding-left: 1.5em;
}
.kb-article-body .article-list li,
.kb-article-body .article-list-ordered li,
.kb-article-body ul li,
.kb-article-body ol li {
    margin-bottom: 0.5em;
}
/* Nested lists */
.kb-article-body ul ul,
.kb-article-body ol ol,
.kb-article-body ul ol,
.kb-article-body ol ul {
    margin-top: 0.25em;
    margin-bottom: 0.25em;
}
/* Nested ordered list numbering: 1 → a → i → A */
.kb-article-body ol ol { list-style-type: lower-alpha; }
.kb-article-body ol ol ol { list-style-type: lower-roman; }
.kb-article-body ol ol ol ol { list-style-type: upper-alpha; }
/* WYSIWYG images (no class) */
.kb-article-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--kb-radius-sm);
    margin: 1em 0;
}
/* Responsive video embeds */
.kb-article-body .kb-video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    margin: 1.5em 0;
    border-radius: var(--kb-radius-sm);
}
.kb-article-body .kb-video-wrapper iframe {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    border: none;
    border-radius: var(--kb-radius-sm);
}
/* Underline support */
.kb-article-body u { text-decoration: underline; }

.kb-article-body .article-divider {
    border: none;
    height: 1px;
    background: var(--kb-border);
    margin: 2em 0;
}

.kb-article-body .article-quote {
    border-left: 4px solid var(--kb-teal);
    padding: 12px 20px;
    background: var(--kb-teal-glow);
    border-radius: 0 var(--kb-radius-sm) var(--kb-radius-sm) 0;
    margin: 1.5em 0;
    font-style: italic;
    color: var(--kb-text-secondary);
}

/* Code blocks */
.code-block {
    background: #0d1117;
    border-radius: var(--kb-radius-sm);
    margin: 1.5em 0;
    overflow: hidden;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.code-header span {
    font-size: 0.6875rem;
    color: rgba(255,255,255,0.45);
    font-weight: 600;
    letter-spacing: 0.05em;
    font-family: var(--kb-font-mono);
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    color: rgba(255,255,255,0.5);
    font-size: 0.75rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    font-family: var(--kb-font-body);
    transition: all var(--kb-transition);
}
.copy-btn:hover { color: #fff; background: rgba(255,255,255,0.1); }
.copy-btn.copied { color: var(--kb-success); }

.code-block pre {
    padding: 16px;
    overflow-x: auto;
}

.code-block code {
    font-family: var(--kb-font-mono);
    font-size: 0.8375rem;
    color: #c9d1d9;
    line-height: 1.6;
}

.inline-code {
    font-family: var(--kb-font-mono);
    font-size: 0.85em;
    background: var(--kb-surface-active);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--kb-teal-dark);
}

/* Callout boxes */
.callout, .kb-callout {
    padding: 16px 20px;
    border-radius: var(--kb-radius-sm);
    margin: 1.5em 0;
    border-left: 4px solid;
    font-size: 0.9375rem;
    line-height: 1.6;
}
.callout-info, .kb-callout-info { background: rgba(59,130,246,0.08); border-color: var(--kb-info); }
.callout-warning, .kb-callout-warning { background: rgba(239,68,68,0.08); border-color: var(--kb-danger); }
.callout-tip, .kb-callout-tip { background: rgba(16,185,129,0.08); border-color: var(--kb-success); }
.callout-alert, .kb-callout-alert { background: rgba(245,158,11,0.08); border-color: var(--kb-warning); }
.callout-idea, .kb-callout-idea { background: rgba(16,185,129,0.08); border-color: var(--kb-success); }
.callout-notes, .kb-callout-notes { background: rgba(234,179,8,0.08); border-color: #eab308; }
.callout-quote, .kb-callout-quote { background: rgba(148,163,184,0.08); border-color: #94a3b8; font-style: italic; }

/* Responsive video embed */
.kb-video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    margin: 16px 0;
    border-radius: 8px;
}
.kb-video-wrapper iframe {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    border: none;
    border-radius: 8px;
}

/* ─── Table of Contents ──────────────────────────────────────────────────── */
.kb-toc {
    background: var(--kb-surface-hover);
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius-sm);
    padding: 20px 24px;
    margin-bottom: 32px;
}

.kb-toc-title {
    font-weight: 700;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--kb-text-muted);
    margin-bottom: 12px;
}

.kb-toc-list { list-style: none; }

.kb-toc-list a {
    display: block;
    padding: 5px 0;
    font-size: 0.875rem;
    color: var(--kb-text-secondary);
    font-weight: 500;
    transition: color var(--kb-transition);
}
.kb-toc-list a:hover { color: var(--kb-teal); }
.kb-toc-list .toc-h3 { padding-left: 16px; font-size: 0.8125rem; }

/* ─── Sidebar ────────────────────────────────────────────────────────────── */
.kb-article-sidebar {
    position: sticky;
    top: calc(var(--kb-header-height) + 24px);
}

.kb-sidebar-section {
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--kb-shadow-sm);
}

.kb-sidebar-title {
    font-weight: 700;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--kb-text-muted);
    margin-bottom: 14px;
}

.kb-sidebar-list { list-style: none; }

.kb-sidebar-list li a {
    display: block;
    padding: 8px 0;
    font-size: 0.8375rem;
    color: var(--kb-text-secondary);
    border-bottom: 1px solid var(--kb-border-light);
    font-weight: 500;
}
.kb-sidebar-list li:last-child a { border-bottom: none; }
.kb-sidebar-list li a:hover { color: var(--kb-teal); }

/* ─── Feedback Widget ────────────────────────────────────────────────────── */
.kb-feedback {
    border-top: 1px solid var(--kb-border);
    margin-top: 40px;
    padding-top: 32px;
    text-align: center;
}

.kb-feedback-question {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 16px;
}

.kb-feedback-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 16px;
}

.kb-feedback-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: var(--kb-radius-sm);
    border: 1px solid var(--kb-border);
    background: var(--kb-surface);
    color: var(--kb-text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--kb-transition);
    font-family: var(--kb-font-body);
}

.kb-feedback-btn:hover { border-color: var(--kb-teal); color: var(--kb-teal); }
.kb-feedback-btn.selected-yes { background: rgba(16,185,129,0.1); border-color: var(--kb-success); color: var(--kb-success); }
.kb-feedback-btn.selected-no { background: rgba(239,68,68,0.1); border-color: var(--kb-danger); color: var(--kb-danger); }

.kb-feedback-comment {
    max-width: 480px;
    margin: 0 auto;
    display: none;
}
.kb-feedback-comment.active { display: block; }

.kb-feedback-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius-sm);
    font-family: var(--kb-font-body);
    font-size: 0.875rem;
    resize: vertical;
    min-height: 80px;
    color: var(--kb-text);
    background: var(--kb-surface);
    outline: none;
    transition: border-color var(--kb-transition);
}
.kb-feedback-textarea:focus { border-color: var(--kb-teal); }

.kb-feedback-submit {
    margin-top: 10px;
    padding: 10px 20px;
    background: var(--kb-teal);
    color: white;
    border: none;
    border-radius: var(--kb-radius-sm);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    font-family: var(--kb-font-body);
    transition: opacity var(--kb-transition);
}
.kb-feedback-submit:hover { opacity: 0.9; }

.kb-feedback-thanks {
    display: none;
    padding: 20px;
    color: var(--kb-success);
    font-weight: 600;
}

/* ─── Search Results ─────────────────────────────────────────────────────── */
.kb-search-result {
    padding: 20px 0;
    border-bottom: 1px solid var(--kb-border-light);
}

.kb-search-result h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    margin-bottom: 4px;
}
.kb-search-result h3 a { color: var(--kb-text); }
.kb-search-result h3 a:hover { color: var(--kb-teal); }

.kb-search-result .sr-cat {
    font-size: 0.75rem;
    color: var(--kb-teal);
    font-weight: 600;
    margin-bottom: 6px;
}

.kb-search-result .sr-excerpt {
    font-size: 0.875rem;
    color: var(--kb-text-secondary);
    line-height: 1.6;
}

.kb-search-result mark {
    background: rgba(0,180,216,0.15);
    color: var(--kb-teal-dark);
    border-radius: 2px;
    padding: 0 2px;
}

/* ─── Footer ─────────────────────────────────────────────────────────────── */
.kb-footer {
    background: var(--kb-navy);
    color: rgba(255,255,255,0.5);
    padding: 32px 24px;
    text-align: center;
    font-size: 0.8125rem;
}

.kb-footer a { color: rgba(255,255,255,0.7); }
.kb-footer a:hover { color: var(--kb-teal-light); }

.kb-footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

/* ─── Inline Search (Category & Article Pages) ──────────────────────────── */
.kb-page-search {
    max-width: 420px;
    margin-bottom: 28px;
}

.kb-page-search .kb-search-box {
    box-shadow: var(--kb-shadow-sm);
}

/* ─── Print Styles ───────────────────────────────────────────────────────── */
.kb-print-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--kb-border);
    background: var(--kb-surface);
    color: var(--kb-text-secondary);
    border-radius: var(--kb-radius-sm);
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--kb-font-body);
    transition: all var(--kb-transition);
}
.kb-print-btn:hover { border-color: var(--kb-teal); color: var(--kb-teal); }

@media print {
    .kb-header, .kb-footer, .kb-article-sidebar,
    .kb-feedback, .kb-breadcrumbs, .kb-print-btn,
    .kb-theme-toggle, .kb-header-nav { display: none !important; }
    .kb-article-layout { grid-template-columns: 1fr !important; }
    .kb-article-content { border: none; box-shadow: none; padding: 0; }
    body { background: white; color: black; }
}

/* ─── 404 Page ───────────────────────────────────────────────────────────── */
.kb-404 {
    text-align: center;
    padding: 80px 24px;
}
.kb-404 h1 { font-size: 4rem; color: var(--kb-text-muted); font-weight: 800; margin-bottom: 8px; }
.kb-404 p { color: var(--kb-text-secondary); margin-bottom: 24px; }

/* ─── Admin Styles ───────────────────────────────────────────────────────── */
.kb-admin-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    min-height: calc(100vh - var(--kb-header-height));
}

@media (max-width: 800px) {
    .kb-admin-layout { grid-template-columns: 1fr; }
}

.kb-admin-sidebar {
    background: var(--kb-surface);
    border-right: 1px solid var(--kb-border);
    padding: 24px 16px;
}

.kb-admin-sidebar a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: var(--kb-radius-sm);
    color: var(--kb-text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    margin-bottom: 4px;
    transition: all var(--kb-transition);
}
.kb-admin-sidebar a:hover, .kb-admin-sidebar a.active {
    background: var(--kb-teal-glow);
    color: var(--kb-teal);
}

.kb-admin-content {
    padding: 32px;
    overflow-x: auto;
}

.kb-stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.kb-stat-card {
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius);
    padding: 20px;
}

.kb-stat-card .stat-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--kb-text-muted);
    margin-bottom: 4px;
}

.kb-stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--kb-text);
    letter-spacing: -0.03em;
}

/* Admin Table */
.kb-admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.kb-admin-table th {
    text-align: left;
    padding: 10px 12px;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--kb-text-muted);
    border-bottom: 2px solid var(--kb-border);
}

.kb-admin-table td {
    padding: 12px;
    border-bottom: 1px solid var(--kb-border-light);
    vertical-align: middle;
}

.kb-admin-table tr:hover td { background: var(--kb-surface-hover); }

/* Admin Buttons */
.kb-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--kb-radius-sm);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--kb-transition);
    border: none;
    font-family: var(--kb-font-body);
}

.kb-btn-primary {
    background: linear-gradient(135deg, var(--kb-teal), var(--kb-teal-dark));
    color: white;
}
.kb-btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }

.kb-btn-secondary {
    background: var(--kb-surface);
    color: var(--kb-text);
    border: 1px solid var(--kb-border);
}
.kb-btn-secondary:hover { border-color: var(--kb-teal); color: var(--kb-teal); }

.kb-btn-danger {
    background: var(--kb-danger);
    color: white;
}
.kb-btn-danger:hover { opacity: 0.9; }

.kb-btn-sm { padding: 6px 12px; font-size: 0.8125rem; }

/* Admin Forms */
.kb-form-group { margin-bottom: 20px; }

.kb-form-label {
    display: block;
    font-weight: 600;
    font-size: 0.8125rem;
    color: var(--kb-text-secondary);
    margin-bottom: 6px;
}

.kb-form-input, .kb-form-select, .kb-form-textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius-sm);
    font-family: var(--kb-font-body);
    font-size: 0.9375rem;
    color: var(--kb-text);
    background: var(--kb-surface);
    outline: none;
    transition: border-color var(--kb-transition);
}
.kb-form-input:focus, .kb-form-select:focus, .kb-form-textarea:focus {
    border-color: var(--kb-teal);
    box-shadow: 0 0 0 3px var(--kb-teal-glow);
}

.kb-form-textarea {
    font-family: var(--kb-font-mono);
    min-height: 400px;
    resize: vertical;
    line-height: 1.6;
}

/* Status badge */
.kb-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.kb-badge-published { background: rgba(16,185,129,0.1); color: var(--kb-success); }
.kb-badge-draft { background: rgba(245,158,11,0.1); color: var(--kb-warning); }

/* Login page */
.kb-login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--kb-navy);
}

.kb-login-box {
    background: var(--kb-surface);
    border-radius: var(--kb-radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--kb-shadow-xl);
}

.kb-login-box h2 {
    font-family: var(--kb-font-display);
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 24px;
    text-align: center;
}

.kb-login-error {
    background: rgba(239,68,68,0.1);
    color: var(--kb-danger);
    padding: 10px 14px;
    border-radius: var(--kb-radius-sm);
    font-size: 0.875rem;
    margin-bottom: 16px;
    font-weight: 500;
}

/* ─── Animations ─────────────────────────────────────────────────────────── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.kb-category-card { animation: fadeInUp 0.4s ease both; }
.kb-category-card:nth-child(1) { animation-delay: 0.05s; }
.kb-category-card:nth-child(2) { animation-delay: 0.1s; }
.kb-category-card:nth-child(3) { animation-delay: 0.15s; }
.kb-category-card:nth-child(4) { animation-delay: 0.2s; }
.kb-category-card:nth-child(5) { animation-delay: 0.25s; }

/* ─── Support Triage Modal ────────────────────────────────────────────────── */
.kb-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(15, 27, 45, 0.65);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.kb-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.kb-modal {
    background: var(--kb-surface);
    border-radius: var(--kb-radius-lg);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3), 0 0 0 1px var(--kb-border);
    width: 100%;
    max-width: 580px;
    max-height: 90vh;
    overflow-y: auto;
    transform: translateY(16px) scale(0.97);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.kb-modal-overlay.active .kb-modal {
    transform: translateY(0) scale(1);
}

.kb-modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 28px 28px 0;
    gap: 16px;
}

.kb-modal-title {
    font-family: var(--kb-font-display);
    font-size: 1.375rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--kb-text);
    margin: 0 0 4px;
}

.kb-modal-subtitle {
    font-size: 0.875rem;
    color: var(--kb-text-secondary);
    margin: 0;
    line-height: 1.5;
}

.kb-modal-close {
    background: var(--kb-surface-hover);
    border: 1px solid var(--kb-border);
    color: var(--kb-text-muted);
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: var(--kb-radius-sm);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--kb-transition);
}

.kb-modal-close:hover {
    background: var(--kb-surface-active);
    color: var(--kb-text);
    border-color: var(--kb-text-muted);
}

.kb-modal-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 20px 28px;
}

.kb-modal-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 18px;
    border-radius: var(--kb-radius-sm);
    border: 1px solid var(--kb-border);
    background: var(--kb-surface);
    color: var(--kb-text);
    text-decoration: none;
    transition: all var(--kb-transition);
    cursor: pointer;
}

.kb-modal-card:hover {
    border-color: var(--kb-teal);
    background: var(--kb-teal-glow);
    color: var(--kb-text);
    transform: translateX(4px);
    box-shadow: var(--kb-shadow-md);
}

.kb-modal-card-icon {
    font-size: 1.75rem;
    line-height: 1;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--kb-surface-hover);
    border-radius: var(--kb-radius-sm);
}

.kb-modal-card:hover .kb-modal-card-icon {
    background: rgba(0, 180, 216, 0.12);
}

.kb-modal-card-body {
    flex: 1;
    min-width: 0;
}

.kb-modal-card-title {
    font-weight: 700;
    font-size: 0.9375rem;
    margin-bottom: 2px;
    letter-spacing: -0.01em;
}

.kb-modal-card-desc {
    font-size: 0.8125rem;
    color: var(--kb-text-secondary);
    line-height: 1.45;
}

.kb-modal-card-arrow {
    color: var(--kb-text-muted);
    flex-shrink: 0;
    opacity: 0;
    transform: translateX(-4px);
    transition: all var(--kb-transition);
}

.kb-modal-card:hover .kb-modal-card-arrow {
    opacity: 1;
    transform: translateX(0);
    color: var(--kb-teal);
}

.kb-modal-footer {
    padding: 0 28px 24px;
    text-align: center;
}

.kb-modal-footer p {
    font-size: 0.8125rem;
    color: var(--kb-text-muted);
    margin: 0;
}

.kb-modal-footer a {
    color: var(--kb-teal-dark);
    font-weight: 600;
}

@media (max-width: 600px) {
    .kb-modal {
        max-width: 100%;
        margin: 0;
        border-radius: var(--kb-radius) var(--kb-radius) 0 0;
        max-height: 85vh;
    }
    .kb-modal-overlay {
        align-items: flex-end;
        padding: 0;
    }
    .kb-modal-header { padding: 24px 20px 0; }
    .kb-modal-grid { padding: 16px 20px; }
    .kb-modal-footer { padding: 0 20px 20px; }
}

/* ─── Mobile Responsive ─────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .kb-header { height: 56px; }
    .kb-header-inner { padding: 0 12px; gap: 8px; }
    .kb-logo { gap: 8px; }
    .kb-logo-img { height: 28px; }
    .kb-logo-divider, .kb-logo-label { display: none; }
    .kb-header-nav { gap: 6px; }
    .kb-nav-btn { padding: 6px 10px; font-size: 0.75rem; gap: 4px; }
    .kb-nav-btn svg { width: 14px; height: 14px; }
    .kb-theme-toggle { width: 32px; height: 32px; }
    .kb-hero { padding: 32px 16px 40px; }
    .kb-hero h1 { font-size: 1.375rem; }
    .kb-hero p { font-size: 0.875rem; }
    .kb-search-box { padding: 10px 14px; }
    .kb-search-input { font-size: 16px; } /* >=16px: prevents iOS Safari auto-zoom on focus */
    .kb-search-btn { padding: 8px 14px; font-size: 0.8125rem; }
    .kb-categories-grid { grid-template-columns: 1fr; gap: 12px; margin-bottom: 32px; }
    .kb-category-card { padding: 18px; }
    .kb-section-header { padding: 0 16px; }
    .kb-article-list-item a { padding: 14px 16px; }
}

@media (max-width: 480px) {
    .kb-header-inner { padding: 0 8px; gap: 6px; }
    .kb-logo-img { height: 24px; }
    .kb-nav-text { display: none; }
    .kb-nav-btn { padding: 7px 9px; }
    .kb-hero { padding: 24px 12px 32px; }
    .kb-hero h1 { font-size: 1.2rem; }
    .kb-search-wrapper { padding: 0 4px; }
    .kb-article-content { padding: 18px 14px; }
    .kb-modal-card { padding: 14px; }
}

/* ─── Utilities ──────────────────────────────────────────────────────────── */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.text-muted { color: var(--kb-text-muted); }
.text-sm { font-size: 0.875rem; }
.fw-600 { font-weight: 600; }
.hidden { display: none !important; }