/* ============================================================
   CryptoTradeGuide - Main Stylesheet
   Professional Fintech Education Theme
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
    --color-bg-primary: #0a0e27;
    --color-bg-secondary: #111636;
    --color-bg-card: #161b45;
    --color-bg-card-hover: #1c2255;
    --color-accent-gold: #f0b90b;
    --color-accent-gold-dark: #c99a09;
    --color-accent-blue: #1e90ff;
    --color-accent-blue-dark: #0066cc;
    --color-accent-green: #0ecb81;
    --color-accent-red: #f6465d;
    --color-text-primary: #eaecef;
    --color-text-secondary: #b7bdc6;
    --color-text-muted: #848e9c;
    --color-border: #252a4a;
    --color-border-light: #2e3566;
    --color-white: #ffffff;
    --color-black: #000000;

    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(240, 185, 11, 0.15);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    --container-max: 1200px;
    --container-narrow: 800px;
    --header-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--color-accent-gold);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent-gold-dark);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-white);
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 4vw, 2.4rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.2rem, 3vw, 1.6rem); margin-bottom: 0.75rem; }
h4 { font-size: 1.15rem; margin-bottom: 0.5rem; }

p {
    margin-bottom: 1rem;
    color: var(--color-text-secondary);
}

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

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Header / Navigation ---------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(10, 14, 39, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: background var(--transition-base);
}

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

.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.35rem;
    color: var(--color-white);
    text-decoration: none;
}

.site-logo .logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-gold-dark));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--color-bg-primary);
    font-weight: 900;
}

.site-logo .logo-text-accent {
    color: var(--color-accent-gold);
}

/* Desktop Nav */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
}

.nav-menu a {
    display: block;
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.06);
}

.nav-cta {
    margin-left: 12px;
}

.nav-cta a {
    background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-gold-dark)) !important;
    color: var(--color-bg-primary) !important;
    font-weight: 700 !important;
    padding: 10px 22px !important;
    border-radius: var(--radius-full) !important;
}

.nav-cta a:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    gap: 5px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- FTC Disclosure Banner ---------- */
.disclosure-banner {
    background: rgba(240, 185, 11, 0.08);
    border-bottom: 1px solid rgba(240, 185, 11, 0.2);
    padding: 8px 24px;
    text-align: center;
    font-size: 0.78rem;
    color: var(--color-text-muted);
    margin-top: var(--header-height);
}

.disclosure-banner a {
    color: var(--color-accent-gold);
    text-decoration: underline;
}

/* ---------- Hero Section ---------- */
.hero {
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(240, 185, 11, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: heroOrb1 20s ease-in-out infinite;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(30, 144, 255, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    animation: heroOrb2 25s ease-in-out infinite;
}

@keyframes heroOrb1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-80px, 60px) scale(1.1); }
}

@keyframes heroOrb2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(60px, -40px) scale(1.15); }
}

.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(37, 42, 74, 0.3) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 42, 74, 0.3) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.3;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 720px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(240, 185, 11, 0.1);
    border: 1px solid rgba(240, 185, 11, 0.25);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-accent-gold);
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease both;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--color-accent-green);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
    font-size: clamp(2.2rem, 5.5vw, 3.6rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, var(--color-accent-gold), #fcd34d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.15rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    max-width: 580px;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-stat {
    text-align: left;
}

.hero-stat-value {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--color-white);
}

.hero-stat-value .accent {
    color: var(--color-accent-gold);
}

.hero-stat-label {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-top: 2px;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-gold-dark));
    color: var(--color-bg-primary);
    box-shadow: 0 4px 20px rgba(240, 185, 11, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(240, 185, 11, 0.4);
    color: var(--color-bg-primary);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-light);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-text-muted);
    color: var(--color-white);
}

.btn-ghost {
    background: transparent;
    color: var(--color-accent-gold);
    padding: 14px 0;
}

.btn-ghost:hover {
    color: var(--color-white);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
}

/* ---------- Section Layout ---------- */
.section {
    padding: 80px 0;
    position: relative;
}

.section-alt {
    background: var(--color-bg-secondary);
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 48px;
}

.section-label {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-accent-gold);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 1.05rem;
    color: var(--color-text-muted);
}

/* ---------- Cards ---------- */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: var(--color-border-light);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.card-icon {
    width: 52px;
    height: 52px;
    background: rgba(240, 185, 11, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.card h3 {
    color: var(--color-white);
    margin-bottom: 12px;
}

.card p {
    color: var(--color-text-muted);
    font-size: 0.93rem;
    line-height: 1.6;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 16px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-accent-gold);
}

.card-link:hover {
    gap: 10px;
}

/* Card Grid */
.card-grid {
    display: grid;
    gap: 24px;
}

.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- Feature Row ---------- */
.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 40px 0;
}

.feature-row.reversed {
    direction: rtl;
}

.feature-row.reversed > * {
    direction: ltr;
}

.feature-image {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.feature-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent-gold), var(--color-accent-blue));
}

.feature-visual {
    font-size: 5rem;
    line-height: 1;
    margin-bottom: 16px;
}

/* ---------- Steps ---------- */
.steps {
    counter-reset: step-counter;
}

.step-item {
    display: flex;
    gap: 24px;
    padding: 28px 0;
    border-bottom: 1px solid var(--color-border);
    counter-increment: step-counter;
}

.step-item:last-child {
    border-bottom: none;
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-gold-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--color-bg-primary);
}

.step-content h3 {
    margin-bottom: 8px;
}

.step-content p {
    font-size: 0.93rem;
    color: var(--color-text-muted);
    margin-bottom: 0;
}

/* ---------- Comparison Table ---------- */
.comparison-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.comparison-table th,
.comparison-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.comparison-table th {
    background: var(--color-bg-card);
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-muted);
}

.comparison-table td {
    font-size: 0.93rem;
    color: var(--color-text-secondary);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.comparison-table .highlight-row td {
    background: rgba(240, 185, 11, 0.05);
    border-left: 3px solid var(--color-accent-gold);
}

.check-yes {
    color: var(--color-accent-green);
    font-weight: 700;
}

.check-no {
    color: var(--color-text-muted);
}

/* ---------- FAQ / Accordion ---------- */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    overflow: hidden;
    transition: border-color var(--transition-base);
}

.faq-item:hover {
    border-color: var(--color-border-light);
}

.faq-question {
    width: 100%;
    background: var(--color-bg-card);
    border: none;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    text-align: left;
    transition: background var(--transition-fast);
}

.faq-question:hover {
    background: var(--color-bg-card-hover);
}

.faq-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent-gold);
    transition: transform var(--transition-base);
    font-size: 1.2rem;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer-inner {
    padding: 0 24px 20px;
    font-size: 0.93rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ---------- CTA Section ---------- */
.cta-section {
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(240, 185, 11, 0.06) 0%, rgba(30, 144, 255, 0.04) 100%);
}

.cta-section .container {
    position: relative;
    z-index: 1;
}

.cta-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 60px 40px;
    max-width: 700px;
    margin: 0 auto;
}

.cta-box h2 {
    margin-bottom: 16px;
}

.cta-box p {
    margin-bottom: 28px;
    font-size: 1.05rem;
}

/* ---------- Footer ---------- */
.site-footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-brand p {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    margin-top: 16px;
    line-height: 1.6;
}

.footer-heading {
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding: 24px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-bottom p {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin: 0;
}

.footer-disclaimer {
    background: rgba(246, 70, 93, 0.06);
    border: 1px solid rgba(246, 70, 93, 0.15);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    margin-top: 24px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.footer-disclaimer strong {
    color: var(--color-accent-red);
}

/* ---------- Page Content (for inner pages) ---------- */
.page-hero {
    padding: 140px 0 60px;
    text-align: center;
    position: relative;
}

.page-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

.page-content {
    padding: 60px 0 80px;
}

.page-content .container-narrow p {
    margin-bottom: 1.2rem;
}

.page-content .container-narrow h2 {
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.page-content .container-narrow h2:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.page-content .container-narrow h3 {
    margin-top: 1.8rem;
}

.page-content .container-narrow ul,
.page-content .container-narrow ol {
    margin: 0 0 1.2rem 1.5rem;
    color: var(--color-text-secondary);
}

.page-content .container-narrow li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.page-content .container-narrow blockquote {
    border-left: 3px solid var(--color-accent-gold);
    padding: 16px 24px;
    margin: 1.5rem 0;
    background: rgba(240, 185, 11, 0.05);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* ---------- Glossary ---------- */
.glossary-letter {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-accent-gold);
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border);
}

.glossary-term {
    margin-bottom: 1.5rem;
}

.glossary-term dt {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--color-white);
    margin-bottom: 4px;
}

.glossary-term dd {
    color: var(--color-text-muted);
    font-size: 0.93rem;
    line-height: 1.6;
    padding-left: 16px;
    border-left: 2px solid var(--color-border);
}

/* ---------- Info Box ---------- */
.info-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    margin: 1.5rem 0;
}

.info-box.warning {
    border-color: rgba(240, 185, 11, 0.3);
    background: rgba(240, 185, 11, 0.05);
}

.info-box.danger {
    border-color: rgba(246, 70, 93, 0.3);
    background: rgba(246, 70, 93, 0.05);
}

.info-box.tip {
    border-color: rgba(14, 203, 129, 0.3);
    background: rgba(14, 203, 129, 0.05);
}

.info-box-title {
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.info-box p:last-child {
    margin-bottom: 0;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

.breadcrumb a {
    color: var(--color-text-muted);
}

.breadcrumb a:hover {
    color: var(--color-accent-gold);
}

.breadcrumb span {
    color: var(--color-text-muted);
}

/* ---------- TOC (Table of Contents) ---------- */
.toc {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-bottom: 2rem;
}

.toc-title {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

.toc ol {
    list-style: none;
    margin: 0;
    padding: 0;
    counter-reset: toc-counter;
}

.toc li {
    counter-increment: toc-counter;
    margin-bottom: 8px;
}

.toc li a {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    padding: 6px 0;
    transition: color var(--transition-fast);
}

.toc li a::before {
    content: counter(toc-counter, decimal-leading-zero);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--color-accent-gold);
    font-weight: 600;
}

.toc li a:hover {
    color: var(--color-white);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .feature-row { gap: 40px; }
}

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }

    .section { padding: 60px 0; }

    /* Mobile Nav */
    .menu-toggle { display: flex; }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-bg-primary);
        flex-direction: column;
        padding: 24px;
        gap: 4px;
        transform: translateX(100%);
        transition: transform var(--transition-base);
        overflow-y: auto;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-menu a {
        padding: 14px 16px;
        font-size: 1rem;
        border-bottom: 1px solid var(--color-border);
        border-radius: 0;
    }

    .nav-cta {
        margin-left: 0;
        margin-top: 12px;
    }

    .nav-cta a {
        display: block;
        text-align: center;
        border-radius: var(--radius-md) !important;
    }

    /* Grids */
    .card-grid-2,
    .card-grid-3,
    .card-grid-4 {
        grid-template-columns: 1fr;
    }

    .feature-row {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .feature-row.reversed {
        direction: ltr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .hero { padding: 100px 0 60px; min-height: auto; }
    .hero-stats { gap: 24px; flex-wrap: wrap; }

    .comparison-table { font-size: 0.85rem; }
    .comparison-table th,
    .comparison-table td { padding: 12px 14px; }

    .cta-box { padding: 40px 24px; }
    .page-hero { padding: 110px 0 40px; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.8rem; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; justify-content: center; }
    .hero-stats { flex-direction: column; gap: 16px; }
}

/* ---------- Utility Classes ---------- */
.text-center { text-align: center; }
.text-gold { color: var(--color-accent-gold); }
.text-green { color: var(--color-accent-green); }
.text-red { color: var(--color-accent-red); }
.text-muted { color: var(--color-text-muted); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}