:root {
    --font-display: 'Chakra Petch', sans-serif;
    --font-sans: 'Manrope', sans-serif;
    --font-mono: 'Fira Code', monospace;
    --cyber-black: #04070d;
    --cyber-darker: #0a0f1d;
    --cyber-dark: #111827;
    --cyber-border: #1f293d;
    --cyber-cyan: #00f0ff;
    --cyber-blue: #3b82f6;
    --cyber-purple: #8b5cf6;
    --cyber-emerald: #10b981;
    --cyber-amber: #f59e0b;
    --cyber-rose: #f43f5e;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background-color: #04070d;
    color: #e2e8f0;
    font-family: var(--font-sans);
    background-image:
        radial-gradient(circle at 15% 15%, rgba(0, 240, 255, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 85% 85%, rgba(139, 92, 246, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.03) 0%, transparent 60%);
    background-attachment: fixed;
}
h1, h2, h3, h4 { margin: 0; }
p { margin: 0; }
a { text-decoration: none; color: inherit; }
ul, ol { margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
input[type="range"] { width: 100%; }
table { width: 100%; }

.bg-blue-950 { background-color: #172554; }
.bg-cyber-dark { background-color: #111827; }
.bg-emerald-950 { background-color: #022c22; }
.bg-cyan-950-40 { background-color: rgba(8, 51, 68, 0.4); }
.bg-cyber-black { background-color: #04070d; }
.bg-purple-950-40 { background-color: rgba(59, 7, 100, 0.4); }
.bg-amber-950 { background-color: #451a03; }
.bg-slate-800 { background-color: #1e293b; }
.bg-blue-950-40 { background-color: rgba(23, 37, 84, 0.4); }
.bg-purple-950 { background-color: #3b0764; }
.bg-rose-950-40 { background-color: rgba(76, 5, 25, 0.4); }
.bg-indigo-950-40 { background-color: rgba(30, 27, 75, 0.4); }
.bg-black-50 { background-color: rgba(0, 0, 0, 0.5); }
.bg-black-60 { background-color: rgba(0, 0, 0, 0.6); }
.bg-cyan-950 { background-color: #083344; }
.bg-cyber-darker { background-color: #0a0f1d; }
.bg-amber-950-40 { background-color: rgba(69, 26, 3, 0.4); }
.bg-emerald-950-40 { background-color: rgba(2, 44, 34, 0.4); }
.bg-indigo-950 { background-color: #1e1b4b; }
.bg-rose-950 { background-color: #4c0519; }
.text-rose-400 { color: #fb7185; }
.text-cyan-400 { color: #22d3ee; }
.text-cyan-300 { color: #67e8f9; }
.text-emerald-400 { color: #34d399; }
.text-indigo-400 { color: #818cf8; }
.text-emerald-300 { color: #6ee7b7; }
.text-slate-300 { color: #cbd5e1; }
.text-amber-400 { color: #fbbf24; }
.text-blue-400 { color: #60a5fa; }
.text-slate-400 { color: #94a3b8; }
.text-indigo-300 { color: #a5b4fc; }
.text-purple-400 { color: #c084fc; }
.text-purple-300 { color: #d8b4fe; }
.text-amber-300 { color: #fcd34d; }
.text-rose-300 { color: #fda4af; }
.text-white { color: #ffffff; }
.text-blue-300 { color: #93c5fd; }
.border-slate-700 { border-color: #334155; }
.border-purple-500-30 { border-color: rgba(168, 85, 247, 0.3); }
.border-emerald-500-30 { border-color: rgba(16, 185, 129, 0.3); }
.border-rose-500-40 { border-color: rgba(244, 63, 94, 0.4); }
.border-amber-400-50 { border-color: rgba(251, 191, 36, 0.5); }
.border-cyber-border-80 { border-color: rgba(31, 41, 61, 0.8); }
.border-emerald-400-40 { border-color: rgba(52, 211, 153, 0.4); }
.border-emerald-500-20 { border-color: rgba(16, 185, 129, 0.2); }
.border-emerald-500-40 { border-color: rgba(16, 185, 129, 0.4); }
.border-purple-400-50 { border-color: rgba(192, 132, 252, 0.5); }
.border-indigo-500-30 { border-color: rgba(99, 102, 241, 0.3); }
.border-slate-500-30 { border-color: rgba(100, 116, 139, 0.3); }
.border-cyber-border { border-color: #1f293d; }
.border-indigo-500-20 { border-color: rgba(99, 102, 241, 0.2); }
.border-blue-400-50 { border-color: rgba(96, 165, 250, 0.5); }
.border-cyan-500-30 { border-color: rgba(6, 182, 212, 0.3); }
.border-rose-400-40 { border-color: rgba(251, 113, 133, 0.4); }
.border-cyan-400-50 { border-color: rgba(34, 211, 238, 0.5); }
.border-cyan-500-40 { border-color: rgba(6, 182, 212, 0.4); }
.border-blue-500-30 { border-color: rgba(59, 130, 246, 0.3); }
.border-amber-500-40 { border-color: rgba(245, 158, 11, 0.4); }
.border-emerald-400-50 { border-color: rgba(52, 211, 153, 0.5); }
.border-blue-500-20 { border-color: rgba(59, 130, 246, 0.2); }
.border-rose-500-30 { border-color: rgba(244, 63, 94, 0.3); }
.border-purple-500-20 { border-color: rgba(168, 85, 247, 0.2); }
.border-amber-400-40 { border-color: rgba(251, 191, 36, 0.4); }
.border-cyan-500-20 { border-color: rgba(6, 182, 212, 0.2); }
.border-slate-800 { border-color: #1e293b; }
.border-cyan-400-40 { border-color: rgba(34, 211, 238, 0.4); }
.border-indigo-400-40 { border-color: rgba(129, 140, 248, 0.4); }
.border-purple-500-40 { border-color: rgba(168, 85, 247, 0.4); }
.border-indigo-400-50 { border-color: rgba(129, 140, 248, 0.5); }
.border-amber-500-20 { border-color: rgba(245, 158, 11, 0.2); }
.border-blue-400-40 { border-color: rgba(96, 165, 250, 0.4); }
.border-purple-400-40 { border-color: rgba(192, 132, 252, 0.4); }
.border-rose-400-50 { border-color: rgba(251, 113, 133, 0.5); }
.border-rose-500-20 { border-color: rgba(244, 63, 94, 0.2); }
.border-amber-500-30 { border-color: rgba(245, 158, 11, 0.3); }
.mt-4 { margin-top: 1.0rem; }
.px-4 { padding-left: 1.0rem; padding-right: 1.0rem; }
.p-6 { padding: 1.5rem; }
.space-y-3 { > * + * { margin-top: 0.75rem; } }
.p-1px { padding: 1px; }
.p-2p5 { padding: 0.625rem; }
.space-y-6 { > * + * { margin-top: 1.5rem; } }
.gap-3 { gap: 0.75rem; }
.space-y-4 { > * + * { margin-top: 1.0rem; } }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.px-1 { padding-left: 0.25rem; padding-right: 0.25rem; }
.mx-auto { margin-left: auto; margin-right: auto; }
.p-2 { padding: 0.5rem; }
.mb-1 { margin-bottom: 0.25rem; }
.pb-4 { padding-bottom: 1.0rem; }
.gap-8 { gap: 2.0rem; }
.pt-1p5 { padding-top: 0.375rem; }
.space-y-2 { > * + * { margin-top: 0.5rem; } }
.space-y-1 { > * + * { margin-top: 0.25rem; } }
.p-3 { padding: 0.75rem; }
.mt-auto { margin-top: auto; }
.mr-1 { margin-right: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.p-4 { padding: 1.0rem; }
.pl-3 { padding-left: 0.75rem; }
.pt-2 { padding-top: 0.5rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.mt-1 { margin-top: 0.25rem; }
.space-y-1p5 { > * + * { margin-top: 0.375rem; } }
.p-5 { padding: 1.25rem; }
.space-y-10 { > * + * { margin-top: 2.5rem; } }
.gap-4 { gap: 1.0rem; }
.pb-2 { padding-bottom: 0.5rem; }
.pt-1 { padding-top: 0.25rem; }
.space-y-12 { > * + * { margin-top: 3.0rem; } }
.pb-3 { padding-bottom: 0.75rem; }
.gap-2p5 { gap: 0.625rem; }
.pr-1 { padding-right: 0.25rem; }
.pl-4 { padding-left: 1.0rem; }
.py-0p5 { padding-top: 0.125rem; padding-bottom: 0.125rem; }
.pt-4 { padding-top: 1.0rem; }
.border-collapse { border-collapse: collapse; }
.text-left { text-align: left; }
.text-center { text-align: center; }
.rounded-lg { border-radius: 0.5rem; }
.rounded { border-radius: 0.25rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-2xl { border-radius: 1rem; }
.min-w-0 { min-width: 0; }
.grid { display: grid; }
.h-12 { height: 3rem; }
.h-10 { height: 2.5rem; }
.h-9 { height: 2.25rem; }
.h-64 { height: 16rem; }
.h-full { height: 100%; }
.w-9 { width: 2.25rem; }
.w-10 { width: 2.5rem; }
.w-12 { width: 3rem; }
.w-full { width: 100%; }
.shrink-0 { flex-shrink: 0; }
.min-h-100px { min-height: 100px; }
.min-h-screen { min-height: 100vh; }
.max-h-75vh { max-height: 75vh; }
.max-w-7xl { max-width: 80rem; }
.lg_w-80 { width: 20rem; }
.text-base { font-size: 1rem; line-height: 1.5rem; }
.text-xs { font-size: 0.75rem; line-height: 1.1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.4rem; }
.text-lg { font-size: 1.125rem; line-height: 1.6rem; }
.text-xl { font-size: 1.25rem; line-height: 1.7rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.lg_text-lg { font-size: 1.125rem; }
.lg_text-3xl { font-size: 1.875rem; }
.text-10px { font-size: 10px; }
.text-11px { font-size: 11px; }
.border { border-width: 1px; border-style: solid; }
.border-b { border-bottom-width: 1px; border-bottom-style: solid; }
.border-t { border-top-width: 1px; border-top-style: solid; }
.border-l { border-left-width: 1px; border-left-style: solid; }
.border-l-2 { border-left-width: 2px; border-left-style: solid; }
.transition { transition: all 0.2s ease; }
.transition-all { transition: all 0.25s ease; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.sticky { position: sticky; }
.relative { position: relative; }
.overflow-hidden { overflow: hidden; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }
.block { display: block; }
.hidden { display: none; }
.flex { display: flex; }
.flex-1 { flex: 1 1 0%; }
.flex-col { flex-direction: column; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.col-span-1 { grid-column: span 1 / span 1; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }
.font-mono { font-family: var(--font-mono); }
.font-sans { font-family: var(--font-sans); }
.font-display { font-family: var(--font-display); }
.uppercase { text-transform: uppercase; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tracking-wider { letter-spacing: 0.05em; }
.tracking-widest { letter-spacing: 0.1em; }
.leading-relaxed { line-height: 1.7; }
.top-0 { top: 0; }
.top-20 { top: 5rem; }
.z-50 { z-index: 50; }
.cursor-grab { cursor: grab; }
.cursor-pointer { cursor: pointer; }
.antialiased { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
.accent-amber-400 { accent-color: #fbbf24; }
.accent-indigo-500 { accent-color: #6366f1; }
.bg-gradient-to-tr { background-image: linear-gradient(to top right, #00f0ff, #2563eb, #9333ea); }
.glass-panel {
    background: rgba(9, 13, 24, 0.72);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(0, 240, 255, 0.14);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}
.cyber-border { position: relative; }
.cyber-border::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, #00f0ff, transparent);
}
.custom-scrollbar::-webkit-scrollbar { width: 6px; height: 6px; }
.custom-scrollbar::-webkit-scrollbar-track { background: #0a0f1d; }
.custom-scrollbar::-webkit-scrollbar-thumb { background: #1f293d; border-radius: 3px; }
.custom-scrollbar::-webkit-scrollbar-thumb:hover { background: #00f0ff; }

.divide-y > * + * { border-top-width: 1px; border-top-style: solid; }
.divide-slate-800 > * + * { border-color: #1e293b; }
.bg-cyber-darker-70 { background-color: rgba(10, 15, 29, 0.7); }




.shadow-0_0_15px_rgba0-240-255-0p3 { box-shadow: 0 0 15px rgba(0,240,255,0.3); }
.shadow-0_0_15px_rgba0-240-255-0p2 { box-shadow: 0 0 15px rgba(0,240,255,0.2); }
.shadow-0_0_15px_rgba139-92-246-0p2 { box-shadow: 0 0 15px rgba(139,92,246,0.2); }
.shadow-0_0_15px_rgba16-185-129-0p2 { box-shadow: 0 0 15px rgba(16,185,129,0.2); }
.shadow-0_0_15px_rgba244-63-94-0p2 { box-shadow: 0 0 15px rgba(244,63,94,0.2); }
.shadow-0_0_15px_rgba245-158-11-0p2 { box-shadow: 0 0 15px rgba(245,158,11,0.2); }
.shadow-0_0_15px_rgba59-130-246-0p2 { box-shadow: 0 0 15px rgba(59,130,246,0.2); }
.shadow-0_0_15px_rgba99-102-241-0p2 { box-shadow: 0 0 15px rgba(99,102,241,0.2); }
.hover_bg-cyan-950-40:hover { background-color: rgba(8, 51, 68, 0.4); }
.first-letter_text-3xl::first-letter { font-size: 1.875rem; line-height: 1; margin-right: 0.15rem; }
.selection_bg-cyan-500::selection { background-color: #06b6d4; }
.hover_bg-purple-950-40:hover { background-color: rgba(59, 7, 100, 0.4); }
.first-letter_text-purple-400::first-letter { color: #c084fc; }
.first-letter_text-cyan-400::first-letter { color: #22d3ee; }
.first-letter_text-amber-400::first-letter { color: #fbbf24; }
.selection_text-black::selection { color: #000000; }
.hover_bg-cyan-900-50:hover { background-color: rgba(22, 78, 99, 0.5); }
.focus_outline-none:focus { outline: none; }
.hover_bg-emerald-900-50:hover { background-color: rgba(6, 78, 59, 0.5); }
.focus_border-purple-400:focus { border-color: #c084fc; box-shadow: 0 0 0 3px rgba(192, 132, 252, 0.15); }
.hover_bg-rose-950-40:hover { background-color: rgba(76, 5, 25, 0.4); }
.hover_bg-emerald-950-40:hover { background-color: rgba(2, 44, 34, 0.4); }
.hover_border-blue-400:hover { border-color: #60a5fa; }
.hover_underline:hover { text-decoration: underline; }
.hover_bg-blue-900-50:hover { background-color: rgba(30, 58, 138, 0.5); }
.hover_bg-indigo-900-50:hover { background-color: rgba(49, 46, 129, 0.5); }
.focus_border-cyan-400:focus { border-color: #22d3ee; box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15); }
.hover_text-rose-300:hover { color: #fda4af; }
.first-letter_text-rose-400::first-letter { color: #fb7185; }
.hover_text-emerald-300:hover { color: #6ee7b7; }
.hover_border-cyan-400:hover { border-color: #22d3ee; }
.first-letter_font-bold::first-letter { font-weight: 700; }
.hover_text-cyan-300:hover { color: #67e8f9; }
.hover_bg-purple-900-50:hover { background-color: rgba(88, 28, 135, 0.5); }
.active_cursor-grabbing:active { cursor: grabbing; }
.focus_border-amber-400:focus { border-color: #fbbf24; box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.15); }
.hover_text-purple-300:hover { color: #d8b4fe; }
.hover_border-purple-400:hover { border-color: #c084fc; }
.hover_bg-cyber-border:hover { background-color: #1f293d; }
.first-letter_text-emerald-400::first-letter { color: #34d399; }
.first-letter_text-blue-400::first-letter { color: #60a5fa; }
.hover_text-indigo-300:hover { color: #a5b4fc; }
.hover_bg-amber-950-40:hover { background-color: rgba(69, 26, 3, 0.4); }
.hover_text-amber-300:hover { color: #fcd34d; }
.hover_bg-rose-900-50:hover { background-color: rgba(136, 19, 55, 0.5); }
.hover_text-blue-300:hover { color: #93c5fd; }
.hover_bg-amber-900-50:hover { background-color: rgba(120, 53, 15, 0.5); }
.first-letter_text-indigo-400::first-letter { color: #818cf8; }
@media (min-width: 768px) {
.md_grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.md_flex-row { flex-direction: row; }
.md_grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}}
@media (min-width: 640px) {
.sm_block { display: block; }
.sm_grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.sm_grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.sm_col-span-2 { grid-column: span 2 / span 2; }
}}
@media (min-width: 1024px) {
.lg_hidden { display: none; }
.lg_px-8 { padding-left: 2rem; padding-right: 2rem; }
.lg_grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.lg_grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.lg_p-8 { padding: 2rem; }
.lg_flex-row { flex-direction: row; }
.lg_grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.lg_block { display: block; }
.lg_grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}}

.reading-progress {
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    width: 0%;
    background: linear-gradient(90deg, var(--cyber-cyan), var(--cyber-purple));
    z-index: 999;
    transition: width 0.1s ease-out;
}

.hero-panel {
    position: relative;
    overflow: hidden;
    border-radius: 1.25rem;
    border: 1px solid rgba(0,240,255,0.18);
    background: linear-gradient(160deg, rgba(10,15,29,0.9), rgba(4,7,13,0.95));
    padding: 2.25rem 2rem;
    margin-bottom: 1.5rem;
}
.hero-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--cyber-cyan);
}
.hero-title {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3.2vw, 2.6rem);
    font-weight: 700;
    color: #fff;
    margin-top: 0.5rem;
    line-height: 1.15;
}
.hero-lede {
    margin-top: 1rem;
    max-width: 62ch;
    font-size: 0.98rem;
    line-height: 1.75;
    color: #b9c4d6;
}
.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 1.75rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(31,41,61,0.8);
}
.hero-stat-num {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cyber-cyan);
}
.hero-stat-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: #7c8aa5;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.lede-p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: #c3ccdc;
}
.lede-p + .lede-p { margin-top: 0.9rem; }

.term-box {
    margin-top: 1.1rem;
    padding: 1.1rem 1.25rem;
    border-radius: 0.85rem;
    background: rgba(4,7,13,0.55);
    border: 1px solid rgba(31,41,61,0.9);
    border-left: 3px solid var(--accent, var(--cyber-cyan));
}
.term-box-title {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--accent, var(--cyber-cyan));
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
}
.term-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.75rem;
}
.term-item {
    padding: 0.7rem 0.85rem;
    background: rgba(10,15,29,0.7);
    border-radius: 0.6rem;
    border: 1px solid rgba(31,41,61,0.7);
}
.term-item dt {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    color: #e2e8f0;
    margin-bottom: 0.25rem;
}
.term-item dd {
    margin: 0;
    font-size: 0.8rem;
    line-height: 1.55;
    color: #94a3b8;
}

.callout {
    margin-top: 1.1rem;
    padding: 1rem 1.15rem;
    border-radius: 0.85rem;
    display: flex;
    gap: 0.85rem;
    align-items: flex-start;
    font-size: 0.86rem;
    line-height: 1.7;
}
.callout i { margin-top: 0.15rem; }
.callout-tip { background: rgba(16,185,129,0.08); border: 1px solid rgba(16,185,129,0.3); color: #cdeee0; }
.callout-tip i { color: var(--cyber-emerald); }
.callout-warn { background: rgba(244,63,94,0.08); border: 1px solid rgba(244,63,94,0.3); color: #f6d3da; }
.callout-warn i { color: var(--cyber-rose); }
.callout-info { background: rgba(59,130,246,0.08); border: 1px solid rgba(59,130,246,0.3); color: #cfe0fb; }
.callout-info i { color: var(--cyber-blue); }
.callout-example { background: rgba(139,92,246,0.08); border: 1px solid rgba(139,92,246,0.3); color: #e0d4fb; }
.callout-example i { color: var(--cyber-purple); }

.recap-box {
    margin-top: 1.25rem;
    padding: 1rem 1.15rem;
    border-radius: 0.85rem;
    background: rgba(4,7,13,0.6);
    border: 1px dashed rgba(0,240,255,0.35);
}
.recap-title {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--cyber-cyan);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.recap-box ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}
.recap-box li {
    font-size: 0.83rem;
    color: #b9c4d6;
    padding-left: 1.1rem;
    position: relative;
}
.recap-box li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--cyber-cyan);
}

.section-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: #7c8aa5;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.chapter-recap {
    margin-top: 1.5rem;
    padding: 1.4rem 1.5rem;
    border-radius: 1rem;
    background: linear-gradient(140deg, rgba(4,7,13,0.9), rgba(10,15,29,0.6));
    border: 1px solid var(--cyber-border);
}
.chapter-recap-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--cyber-emerald);
    display: flex;
    align-items: center;
    gap: 0.55rem;
    margin-bottom: 0.6rem;
}
.chapter-recap p {
    font-size: 0.87rem;
    line-height: 1.75;
    color: #b9c4d6;
}

.glossary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 0.9rem;
}
.glossary-card {
    padding: 1rem 1.1rem;
    background: rgba(10,15,29,0.7);
    border: 1px solid var(--cyber-border);
    border-radius: 0.8rem;
}
.glossary-term {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--cyber-cyan);
    margin-bottom: 0.35rem;
    display: block;
}
.glossary-def {
    font-size: 0.79rem;
    color: #94a3b8;
    line-height: 1.6;
}

.toc-progress-wrap {
    height: 4px;
    width: 100%;
    background: rgba(31,41,61,0.6);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 0.6rem;
}
.toc-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--cyber-cyan), var(--cyber-purple));
    width: 0%;
    transition: width 0.2s ease;
}

@media (min-width: 1024px) {
    .lg-grid-cols-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
}