/* QuickAnswerify - Main Stylesheet */

/* Google Fonts - High Readability */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Nunito:wght@600;700;800&display=swap');

:root {
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-bg-dark: #1a1a2e;
    --color-text: #2d3748;
    --color-text-light: #4a5568;
    --color-text-muted: #718096;
    --color-primary: #e63946;
    --color-accent: #457b9d;
    --color-border: #e2e8f0;
    --color-success: #2a9d8f;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Nunito', -apple-system, BlinkMacSystemFont, sans-serif;
    --max-width: 1200px;
    --content-width: 800px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
}

*, *::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(--font-main); color: var(--color-text); background: var(--color-bg); line-height: 1.7; font-weight: 400; letter-spacing: -0.01em; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 700; line-height: 1.35; color: var(--color-text); letter-spacing: -0.02em; }
h1 { font-size: 2.5rem; margin-bottom: 1rem; font-weight: 800; }
h2 { font-size: 1.75rem; margin-bottom: 0.75rem; margin-top: 2rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }
p { margin-bottom: 1rem; color: var(--color-text-light); font-size: 1.0625rem; line-height: 1.75; }
a { color: var(--color-accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-primary); }

.site-header { background: var(--color-bg); border-bottom: 1px solid var(--color-border); padding: 16px 0; position: sticky; top: 0; z-index: 100; }
.site-header .container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.5rem; font-weight: 700; color: var(--color-text); font-family: var(--font-heading); }
.logo:hover { color: var(--color-primary); }
.main-nav a { margin-left: 24px; color: var(--color-text-light); font-weight: 500; }

.hero { background: linear-gradient(135deg, var(--color-bg-dark) 0%, #16213e 100%); color: white; padding: 80px 0; text-align: center; }
.hero-title { font-size: 3rem; color: white; margin-bottom: 1.5rem; line-height: 1.2; }
.hero-subtitle { font-size: 1.25rem; color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto; }

.stats-section { background: var(--color-bg-alt); padding: 60px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; text-align: center; }
.stat-number { font-size: 2.5rem; font-weight: 700; color: var(--color-text); font-family: var(--font-heading); display: block; }
.stat-label { font-size: 0.9rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 1px; }

.topics-section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 0.5rem; }
.section-subtitle { text-align: center; color: var(--color-text-muted); margin-bottom: 3rem; }
.keywords-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.keyword-card { display: flex; flex-direction: column; padding: 24px; background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-md); transition: all 0.2s; position: relative; }
.keyword-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.keyword-title { font-weight: 600; color: var(--color-text); font-size: 1.1rem; margin-bottom: 8px; }
.keyword-meta { font-size: 0.85rem; color: var(--color-text-muted); }
.keyword-arrow { position: absolute; right: 24px; top: 50%; transform: translateY(-50%); color: var(--color-primary); font-size: 1.5rem; }

.features-section { background: var(--color-bg-alt); padding: 80px 0; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; margin-top: 40px; }
.feature-card { background: var(--color-bg); padding: 30px; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); text-align: center; }
.feature-icon { font-size: 2.5rem; margin-bottom: 16px; }
.feature-card h3 { margin-bottom: 12px; }

.article-page { padding: 40px 0 80px; }
.article-page .container { max-width: var(--content-width); }

/* Content Container for Article Pages */
.content-container { max-width: var(--content-width); margin: 0 auto; padding: 40px 24px 80px; }
.main-article h1 { font-size: 2.25rem; margin-bottom: 24px; }
.nav-container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; display: flex; align-items: center; }
.footer-container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.breadcrumb { font-size: 0.9rem; color: var(--color-text-muted); margin-bottom: 24px; }
.breadcrumb a { color: var(--color-text-muted); }
.article-header { margin-bottom: 32px; }
.article-header h1 { font-size: 2.25rem; }
.article-meta { font-size: 0.9rem; color: var(--color-text-muted); margin-top: 8px; }

.tldr-box { background: linear-gradient(135deg, var(--color-bg-dark) 0%, #16213e 100%); color: white; padding: 32px; border-radius: var(--radius-lg); margin-bottom: 40px; }
.tldr-box * { color: white; }
.tldr-label { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 2px; color: #ff6b6b !important; margin-bottom: 12px; }
.tldr-answer { font-size: 1.75rem; font-weight: 700; margin-bottom: 16px; font-family: var(--font-heading); color: white !important; }
.tldr-explanation { color: rgba(255,255,255,0.85); margin-bottom: 0; line-height: 1.7; }
.tldr-explanation a { color: #ffd166; }

.content-section { margin-bottom: 48px; }
.content-section h2 { padding-bottom: 12px; border-bottom: 2px solid var(--color-border); margin-top: 0; }
.content-section ol, .content-section ul { padding-left: 24px; margin-bottom: 1rem; }
.content-section li { margin-bottom: 12px; color: var(--color-text-light); }

.terms-list { display: flex; flex-direction: column; gap: 20px; }
.term-item dt { font-weight: 600; color: var(--color-text); margin-bottom: 4px; }
.term-item dd { color: var(--color-text-light); padding-left: 16px; border-left: 3px solid var(--color-primary); }
.term-item dd a { color: var(--color-accent); font-size: 0.9rem; }

.callout-box { background: #e8f4f8; border-left: 4px solid var(--color-accent); padding: 20px; border-radius: 0 var(--radius-md) var(--radius-md) 0; margin: 24px 0; }
.callout-box h4 { color: var(--color-accent); margin-bottom: 12px; }
.callout-box ul { margin-bottom: 0; }

.example-box { background: var(--color-bg-alt); padding: 24px; border-radius: var(--radius-md); border-left: 4px solid var(--color-success); }
.example-box h4 { color: var(--color-success); margin-bottom: 16px; }
.example-box em { font-size: 0.9rem; color: var(--color-text-muted); }

.mistakes-list { list-style: none; padding-left: 0; }
.mistakes-list li { padding: 16px; background: #fff5f5; border-left: 4px solid var(--color-primary); margin-bottom: 12px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }

.faq-section .faq-item { padding: 20px 0; border-bottom: 1px solid var(--color-border); }
.faq-question { color: var(--color-text); font-size: 1.1rem; margin-bottom: 8px; }
.faq-answer { color: var(--color-text-light); margin-bottom: 0; }

/* Info Grid & Cards */
.info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin: 24px 0; }
.info-card { background: var(--color-bg); padding: 24px; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.info-card h3 { margin-bottom: 16px; color: var(--color-accent); font-size: 1.1rem; }
.info-card ul { padding-left: 0; list-style: none; }
.info-card li { padding: 8px 0; border-bottom: 1px solid var(--color-border); }
.info-card li:last-child { border-bottom: none; }

/* State Grid */
.state-grid { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0; }
.state-tag { background: var(--color-bg-alt); padding: 8px 16px; border-radius: var(--radius-md); font-size: 0.9rem; font-weight: 500; color: var(--color-text); border: 1px solid var(--color-border); }

/* Comparison Table */
.comparison-table { width: 100%; border-collapse: collapse; margin: 24px 0; border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); }
.comparison-table th { background: var(--color-bg-dark); color: white; padding: 14px 16px; text-align: left; font-weight: 600; }
.comparison-table td { padding: 14px 16px; border-bottom: 1px solid var(--color-border); }
.comparison-table .highlight-green { color: var(--color-success); font-weight: 600; }
.comparison-table .highlight-red { color: var(--color-primary); font-weight: 600; }

/* Calculation Box */
.calculation { background: var(--color-bg-alt); padding: 20px; border-radius: var(--radius-md); margin-top: 16px; }
.calculation p { margin-bottom: 8px; }

/* Mistake List */
.mistakes-list { display: flex; flex-direction: column; gap: 12px; }
.mistake-item { display: flex; gap: 16px; padding: 16px; background: var(--color-bg); border-radius: var(--radius-md); border-left: 4px solid var(--color-primary); }
.mistake-icon { width: 32px; height: 32px; background: var(--color-primary); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; flex-shrink: 0; }

/* Disclaimer Box */
.disclaimer-box { background: #fffbeb; border: 1px solid #fcd34d; padding: 24px; border-radius: var(--radius-md); margin: 40px 0; }
.disclaimer-box h3 { color: #b45309; margin-bottom: 12px; font-size: 1rem; }

.disclaimer { background: #fffbeb; border: 1px solid #fcd34d; padding: 24px; border-radius: var(--radius-md); margin: 40px 0; }
.disclaimer h4 { color: #b45309; margin-bottom: 12px; }
.disclaimer p { font-size: 0.9rem; color: #92400e; margin-bottom: 8px; }
.disclaimer p:last-child { margin-bottom: 0; }

.sources-section { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--color-border); }
.sources-section h3 { margin-bottom: 16px; font-size: 1.1rem; }
.sources-section ul { list-style: none; padding: 0; }
.sources-section li { margin-bottom: 8px; }
.sources-section a { font-size: 0.9rem; }

.related-section { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--color-border); }
.related-section h3 { margin-bottom: 16px; }
.related-links { display: flex; flex-wrap: wrap; gap: 12px; }
.related-link { padding: 10px 20px; background: var(--color-bg-alt); border: 1px solid var(--color-border); border-radius: var(--radius-md); font-size: 0.9rem; transition: all 0.2s; }
.related-link:hover { background: var(--color-primary); border-color: var(--color-primary); color: white; }

.data-table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 0.9rem; }
.data-table th, .data-table td { padding: 12px; text-align: left; border-bottom: 1px solid var(--color-border); }
.data-table th { background: var(--color-bg-alt); font-weight: 600; }
.data-table tr:hover { background: var(--color-bg-alt); }
.table-note { font-size: 0.85rem; color: var(--color-text-muted); margin-top: 8px; }

.site-footer { background: var(--color-bg-dark); color: rgba(255,255,255,0.7); padding: 40px 0; text-align: center; }
.site-footer p { color: rgba(255,255,255,0.7); margin-bottom: 8px; }
.footer-disclaimer { font-size: 0.85rem; color: rgba(255,255,255,0.5); }

/* ================================
   INTERACTIVE COMPONENTS (v2)
   Modern, bright, mobile-first
   ================================ */

/* Stat Pills */
.stat-pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; justify-content: center; }
.pill { background: rgba(255,255,255,0.15); color: white; padding: 8px 16px; border-radius: 9999px; font-size: 0.875rem; font-weight: 600; backdrop-filter: blur(4px); }
.pill.accent { background: var(--color-primary); }
.pill.highlight { background: rgba(42, 157, 143, 0.9); }

/* CTA Button (Hero) */
.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-accent) 0%, #3a6a8a 100%);
    color: white;
    padding: 16px 32px;
    border-radius: var(--radius-lg);
    font-size: 1.125rem;
    font-weight: 600;
    text-decoration: none;
    margin: 24px 0 16px;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
    cursor: pointer;
}
.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(69, 123, 157, 0.4);
    color: white;
}
.cta-button::before { content: "▶ "; }

/* Hero Subtext (for aggressive hero) */
.hero-subtext {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.85);
    margin-bottom: 8px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Result Preview (before calculator) */
.result-preview {
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
    border: 2px solid var(--color-success);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    margin: 32px 0;
}
.result-preview .preview-label {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}
.result-preview .preview-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-success);
    margin-bottom: 8px;
    font-family: var(--font-heading);
}
.result-preview .preview-context {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* Toggle Buttons */
.toggle-container { margin: 24px 0; }
.toggle-buttons { display: flex; background: var(--color-bg-alt); border-radius: var(--radius-md); padding: 4px; max-width: 400px; }
.toggle-buttons button { flex: 1; padding: 12px 16px; border: none; background: transparent; border-radius: var(--radius-sm); cursor: pointer; font-weight: 500; transition: all 0.2s; color: var(--color-text-light); }
.toggle-buttons button.active { background: var(--color-accent); color: white; box-shadow: var(--shadow-sm); }
.toggle-buttons button:hover:not(.active) { background: rgba(0,0,0,0.05); }
.toggle-result { margin-top: 16px; padding: 20px; background: var(--color-bg-alt); border-radius: var(--radius-md); border-left: 4px solid var(--color-accent); }
.toggle-result.warning { border-left-color: #f59e0b; background: #fffbeb; }
.toggle-result.success { border-left-color: var(--color-success); background: #ecfdf5; }

/* Calculator Card */
.calculator-card { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 32px; margin: 32px 0; box-shadow: var(--shadow-md); }
.calculator-card h3 { margin-bottom: 24px; display: flex; align-items: center; gap: 12px; }
.calculator-card h3::before { content: "🧮"; }
.input-group { margin-bottom: 20px; }
.input-group label { display: block; font-weight: 500; margin-bottom: 8px; color: var(--color-text); }
.input-group input[type="number"],
.input-group input[type="text"] { width: 100%; padding: 14px 16px; border: 2px solid var(--color-border); border-radius: var(--radius-md); font-size: 1.1rem; transition: border-color 0.2s; }
.input-group input:focus { outline: none; border-color: var(--color-accent); }
.input-group input[type="range"] { width: 100%; height: 8px; -webkit-appearance: none; background: var(--color-border); border-radius: 4px; }
.input-group input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; background: var(--color-accent); border-radius: 50%; cursor: pointer; }
.range-display { display: flex; justify-content: space-between; margin-top: 8px; font-size: 0.875rem; color: var(--color-text-muted); }
.range-value { font-weight: 600; color: var(--color-accent); }
.calc-results { display: grid; gap: 12px; margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--color-border); }
.calc-result-item { display: flex; justify-content: space-between; align-items: center; padding: 16px; background: var(--color-bg-alt); border-radius: var(--radius-md); }
.calc-result-item .label { color: var(--color-text-light); }
.calc-result-item .value { font-size: 1.25rem; font-weight: 700; color: var(--color-text); }
.calc-result-item.penalty .value { color: var(--color-primary); }
.calc-result-item.highlight { background: var(--color-accent); }
.calc-result-item.highlight .label,
.calc-result-item.highlight .value { color: white; }

/* Accordion */
.accordion { margin: 24px 0; }
.accordion-item { border: 1px solid var(--color-border); border-radius: var(--radius-md); margin-bottom: 8px; overflow: hidden; background: var(--color-bg); }
.accordion-item.highlighted { border-color: var(--color-accent); }
.accordion-item.highlighted .accordion-header { background: rgba(69, 123, 157, 0.05); }
.accordion-header { width: 100%; padding: 16px 20px; background: transparent; border: none; text-align: left; cursor: pointer; display: flex; align-items: center; gap: 12px; font-weight: 500; color: var(--color-text); transition: background 0.2s; }
.accordion-header:hover { background: var(--color-bg-alt); }
.accordion-header .icon { font-size: 1.25rem; }
.accordion-header .arrow { margin-left: auto; transition: transform 0.2s; color: var(--color-text-muted); }
.accordion-item.open .accordion-header .arrow { transform: rotate(180deg); }
.accordion-content { padding: 0 20px 20px; display: none; }
.accordion-item.open .accordion-content { display: block; }
.accordion-content p { margin-bottom: 8px; font-size: 0.95rem; }
.accordion-content strong { color: var(--color-text); }

/* Flow Steps */
.flow-section { background: var(--color-bg-alt); padding: 40px 24px; border-radius: var(--radius-lg); margin: 32px 0; }
.flow-section h3 { text-align: center; margin-bottom: 32px; }
.flow-steps { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 16px; }
.flow-step { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 20px; background: var(--color-bg); border-radius: var(--radius-lg); min-width: 100px; box-shadow: var(--shadow-sm); }
.flow-step .step-icon { font-size: 2rem; }
.flow-step .step-label { font-size: 0.875rem; font-weight: 500; color: var(--color-text); text-align: center; }
.flow-step.warning { border: 2px solid #f59e0b; }
.flow-step.success { border: 2px solid var(--color-success); }
.flow-arrow { font-size: 1.5rem; color: var(--color-text-muted); }

/* FAQ Collapsible */
.faq-collapsible .faq-item { border: 1px solid var(--color-border); border-radius: var(--radius-md); margin-bottom: 8px; overflow: hidden; }
.faq-collapsible .faq-question { width: 100%; padding: 16px 20px; background: var(--color-bg); border: none; text-align: left; cursor: pointer; font-weight: 500; color: var(--color-text); display: flex; justify-content: space-between; align-items: center; }
.faq-collapsible .faq-question:hover { background: var(--color-bg-alt); }
.faq-collapsible .faq-question::after { content: "+"; font-size: 1.25rem; color: var(--color-text-muted); }
.faq-collapsible .faq-item.open .faq-question::after { content: "−"; }
.faq-collapsible .faq-answer { padding: 0 20px 20px; display: none; }
.faq-collapsible .faq-item.open .faq-answer { display: block; }

/* Ad Slots removed - AdSense not approved yet */

/* Sticky Summary Bar (Mobile) */
.sticky-summary { position: fixed; bottom: 0; left: 0; right: 0; background: var(--color-bg); padding: 16px 24px; box-shadow: 0 -4px 12px rgba(0,0,0,0.1); display: none; z-index: 100; border-top: 1px solid var(--color-border); }
.sticky-summary.warning { border-top-color: #f59e0b; }
.sticky-summary.success { border-top-color: var(--color-success); }
.sticky-summary-content { display: flex; align-items: center; gap: 12px; max-width: var(--content-width); margin: 0 auto; }
.sticky-summary .status-icon { font-size: 1.5rem; }
.sticky-summary .status-text { font-weight: 600; }

/* Number Highlights */
.num-highlight { font-size: 1.15em; font-weight: 700; color: var(--color-accent); }
.num-highlight.warning { color: var(--color-primary); }
.num-highlight.success { color: var(--color-success); }

/* ================================
   HOVER & ANIMATION EFFECTS
   ================================ */

/* Fade-in animation on scroll */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.content-section { animation: fadeInUp 0.6s ease-out; }

/* Info cards hover */
.info-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    border: 1px solid transparent;
}
.info-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.1);
    border-color: var(--color-accent);
}

/* Table row hover */
.comparison-table tbody tr {
    transition: background-color 0.2s ease, transform 0.2s ease;
}
.comparison-table tbody tr:hover {
    background-color: rgba(69, 123, 157, 0.08);
    transform: scale(1.01);
}

/* State tags hover */
.state-tag {
    transition: all 0.25s ease;
    cursor: default;
}
.state-tag:hover {
    background: var(--color-accent);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(69, 123, 157, 0.3);
}

/* Mistake items hover */
.mistake-item {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.mistake-item:hover {
    transform: translateX(8px);
    box-shadow: -4px 0 0 var(--color-primary);
}

/* FAQ items hover */
.faq-item {
    transition: background-color 0.2s ease, padding-left 0.2s ease;
}
.faq-item:hover {
    background-color: var(--color-bg-alt);
    padding-left: 16px;
}

/* TL;DR box pulse glow */
.tldr-box {
    transition: box-shadow 0.3s ease;
}
.tldr-box:hover {
    box-shadow: 0 0 30px rgba(230, 57, 70, 0.2), 0 8px 32px rgba(0,0,0,0.15);
}

/* Pills hover */
.pill {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    cursor: default;
}
.pill:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

/* Example box hover */
.example-box {
    transition: border-left-width 0.2s ease, padding-left 0.2s ease;
}
.example-box:hover {
    border-left-width: 8px;
    padding-left: 28px;
}

/* Sources links hover */
.sources-section a {
    transition: color 0.2s ease, padding-left 0.2s ease;
    display: inline-block;
}
.sources-section a:hover {
    color: var(--color-primary);
    padding-left: 8px;
}

/* Disclaimer box hover */
.disclaimer-box, .disclaimer {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.disclaimer-box:hover, .disclaimer:hover {
    transform: scale(1.01);
    box-shadow: 0 8px 24px rgba(252, 211, 77, 0.2);
}

/* Callout box hover */
.callout-box {
    transition: border-left-width 0.2s ease;
}
.callout-box:hover {
    border-left-width: 8px;
}

/* Formula box hover */
.formula-box {
    background: var(--color-bg-alt);
    padding: 20px;
    border-radius: var(--radius-md);
    border: 2px dashed var(--color-border);
    transition: border-color 0.3s ease, background-color 0.3s ease;
}
.formula-box:hover {
    border-color: var(--color-accent);
    background-color: rgba(69, 123, 157, 0.05);
}

/* Note text hover highlight */
.note {
    transition: background-color 0.2s ease;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    margin: 16px 0;
}
.note:hover {
    background-color: #fff3cd;
}

/* Responsive */
@media (max-width: 768px) {
    html { font-size: 15px; }
    .container { padding: 0 16px; }
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.4rem; }

    .hero { padding: 60px 0; }
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1.1rem; }

    .stats-grid { grid-template-columns: 1fr; gap: 24px; }
    .keywords-grid { grid-template-columns: 1fr; }

    .article-header h1 { font-size: 1.75rem; }
    .tldr-box { padding: 20px; }
    .tldr-answer { font-size: 1.35rem; }
    .tldr-detail { font-size: 0.95rem; }

    .stat-pills { gap: 6px; }
    .pill { padding: 6px 12px; font-size: 0.8rem; }

    .info-grid { grid-template-columns: 1fr; gap: 16px; }
    .info-card { padding: 20px; }

    .comparison-table { font-size: 0.85rem; }
    .comparison-table th, .comparison-table td { padding: 10px 12px; }

    .data-table { font-size: 0.8rem; }
    .data-table th, .data-table td { padding: 8px; }

    .state-grid { gap: 8px; }
    .state-tag { padding: 6px 12px; font-size: 0.85rem; }

    .mistake-item { flex-direction: column; gap: 12px; }
    .mistake-icon { width: 28px; height: 28px; font-size: 0.9rem; }

    .example-box { padding: 20px; }
    .formula-box { padding: 16px; }

    .faq-item { padding: 16px 0; }
    .faq-question { font-size: 1rem; }

    .sources-section { margin-top: 32px; }
    .sources-section a { font-size: 0.85rem; }

    /* Interactive components mobile */
    .toggle-buttons { flex-direction: column; }
    .flow-steps { flex-direction: column; }
    .flow-arrow { transform: rotate(90deg); }
    .calculator-card { padding: 24px; }
    .sticky-summary { display: flex; }
    .stat-pills { justify-content: flex-start; }

    /* Reduce hover effects on mobile */
    .info-card:hover,
    .comparison-table tbody tr:hover,
    .faq-item:hover,
    .mistake-item:hover { transform: none; }
}

@media (max-width: 480px) {
    html { font-size: 14px; }
    .hero-title { font-size: 1.75rem; }
    .tldr-answer { font-size: 1.2rem; }
    .comparison-table { display: block; overflow-x: auto; }
}

/* ================================
   COLOR THEME SYSTEM - 5-Color Palettes
   Each theme has 5 harmonious colors:
   - p1: Darkest (hero bg, footer)
   - p2: Dark (headers, sections)
   - p3: Mid (accent, buttons, links)
   - p4: Light (highlights, pills)
   - p5: Lightest (backgrounds, borders)
   Usage: <body class="theme-ocean-blue">
   ================================ */

/* Theme 1: Ocean Blue Serenity - 세금, 금융 */
.theme-ocean-blue {
    --p1: #1e3a5f; --p2: #2c5282; --p3: #4a90a4; --p4: #87ceeb; --p5: #e8f4f8;
    --color-primary: var(--p1); --color-accent: var(--p3);
    --color-accent-light: rgba(74, 144, 164, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p2) 0%, var(--p1) 100%);
}
.theme-ocean-blue .tldr-box { background: var(--p5); border-left: 6px solid var(--p3); }
.theme-ocean-blue .tldr-box, .theme-ocean-blue .tldr-box * { color: var(--p1) !important; }
.theme-ocean-blue .tldr-label { color: var(--p3) !important; }
.theme-ocean-blue .pill { background: var(--p4); color: var(--p1) !important; }
.theme-ocean-blue .pill.highlight { background: var(--p3); color: white !important; }
.theme-ocean-blue .info-card { border-left: 4px solid var(--p3); background: var(--p5); }
.theme-ocean-blue .callout-box { background: var(--p5); border-left-color: var(--p3); }
.theme-ocean-blue .comparison-table th { background: var(--p1); }
.theme-ocean-blue .site-footer { background: var(--p1); }
.theme-ocean-blue .cta-button { background: var(--p3); color: white !important; }

/* Theme 2: Fiery Ocean - 경고성, 패널티 */
.theme-fiery-ocean {
    --p1: #1e3a5f; --p2: #8b1a1a; --p3: #c5281c; --p4: #f5d6ba; --p5: #fff5f0;
    --color-primary: var(--p3); --color-accent: var(--p1);
    --color-accent-light: rgba(197, 40, 28, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p1) 0%, var(--p2) 100%);
}
.theme-fiery-ocean .tldr-box { background: var(--p5); border-left: 6px solid var(--p3); }
.theme-fiery-ocean .tldr-box, .theme-fiery-ocean .tldr-box * { color: var(--p1) !important; }
.theme-fiery-ocean .tldr-label { color: var(--p3) !important; }
.theme-fiery-ocean .pill { background: var(--p4); color: var(--p2) !important; }
.theme-fiery-ocean .pill.highlight, .theme-fiery-ocean .pill.accent { background: var(--p3); color: white !important; }
.theme-fiery-ocean .info-card { border-left: 4px solid var(--p3); background: var(--p5); }
.theme-fiery-ocean .callout-box { background: var(--p5); border-left-color: var(--p3); }
.theme-fiery-ocean .comparison-table th { background: var(--p2); }
.theme-fiery-ocean .site-footer { background: var(--p1); }
.theme-fiery-ocean .cta-button { background: var(--p3); color: white !important; }

/* Theme 3: Summer Ocean Breeze - 혜택, 긍정 */
.theme-ocean-breeze {
    --p1: #006666; --p2: #008b8b; --p3: #20b2aa; --p4: #7fffd4; --p5: #e0ffff;
    --color-primary: var(--p1); --color-accent: var(--p3);
    --color-accent-light: rgba(32, 178, 170, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p3) 0%, var(--p1) 100%);
}
.theme-ocean-breeze .tldr-box { background: var(--p5); border-left: 6px solid var(--p2); }
.theme-ocean-breeze .tldr-box, .theme-ocean-breeze .tldr-box * { color: var(--p1) !important; }
.theme-ocean-breeze .tldr-label { color: var(--p2) !important; }
.theme-ocean-breeze .pill { background: var(--p4); color: var(--p1) !important; }
.theme-ocean-breeze .pill.highlight { background: var(--p2); color: white !important; }
.theme-ocean-breeze .info-card { border-left: 4px solid var(--p3); background: var(--p5); }
.theme-ocean-breeze .callout-box { background: var(--p5); border-left-color: var(--p3); }
.theme-ocean-breeze .comparison-table th { background: var(--p1); }
.theme-ocean-breeze .site-footer { background: var(--p1); }
.theme-ocean-breeze .cta-button { background: var(--p2); color: white !important; }

/* Theme 4: Golden Twilight - 은퇴, 시니어 */
.theme-golden-twilight {
    --p1: #1a1a2e; --p2: #16213e; --p3: #0f3460; --p4: #e9b824; --p5: #fff8e7;
    --color-primary: var(--p4); --color-accent: var(--p3);
    --color-accent-light: rgba(233, 184, 36, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p2) 0%, var(--p3) 100%);
}
.theme-golden-twilight .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-golden-twilight .tldr-box, .theme-golden-twilight .tldr-box * { color: var(--p1) !important; }
.theme-golden-twilight .tldr-label { color: var(--p4) !important; }
.theme-golden-twilight .pill { background: #f5e6b3; color: var(--p1) !important; }
.theme-golden-twilight .pill.highlight { background: var(--p4); color: var(--p1) !important; }
.theme-golden-twilight .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-golden-twilight .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-golden-twilight .comparison-table th { background: var(--p1); }
.theme-golden-twilight .site-footer { background: var(--p1); }
.theme-golden-twilight .cta-button { background: var(--p4); color: var(--p1) !important; }

/* Theme 5: Bold Berry - 건강, 보험 */
.theme-bold-berry {
    --p1: #4a1c24; --p2: #722f37; --p3: #a05a6d; --p4: #d8a9a9; --p5: #fff0f3;
    --color-primary: var(--p2); --color-accent: var(--p3);
    --color-accent-light: rgba(160, 90, 109, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p3) 0%, var(--p2) 100%);
}
.theme-bold-berry .tldr-box { background: var(--p5); border-left: 6px solid var(--p2); }
.theme-bold-berry .tldr-box, .theme-bold-berry .tldr-box * { color: var(--p1) !important; }
.theme-bold-berry .tldr-label { color: var(--p2) !important; }
.theme-bold-berry .pill { background: var(--p4); color: var(--p1) !important; }
.theme-bold-berry .pill.highlight { background: var(--p3); color: white !important; }
.theme-bold-berry .info-card { border-left: 4px solid var(--p3); background: var(--p5); }
.theme-bold-berry .callout-box { background: var(--p5); border-left-color: var(--p3); }
.theme-bold-berry .comparison-table th { background: var(--p1); }
.theme-bold-berry .site-footer { background: var(--p1); }
.theme-bold-berry .cta-button { background: var(--p2); color: white !important; }

/* Theme 6: Earthy Forest - 환경, 저축 */
.theme-earthy-forest {
    --p1: #1a3009; --p2: #2d5016; --p3: #4a7c59; --p4: #8fbc8f; --p5: #f0fff0;
    --color-primary: var(--p2); --color-accent: var(--p3);
    --color-accent-light: rgba(74, 124, 89, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p3) 0%, var(--p2) 100%);
}
.theme-earthy-forest .tldr-box { background: var(--p5); border-left: 6px solid var(--p2); }
.theme-earthy-forest .tldr-box, .theme-earthy-forest .tldr-box * { color: var(--p1) !important; }
.theme-earthy-forest .tldr-label { color: var(--p2) !important; }
.theme-earthy-forest .pill { background: var(--p4); color: var(--p1) !important; }
.theme-earthy-forest .pill.highlight { background: var(--p2); color: white !important; }
.theme-earthy-forest .info-card { border-left: 4px solid var(--p3); background: var(--p5); }
.theme-earthy-forest .callout-box { background: var(--p5); border-left-color: var(--p3); }
.theme-earthy-forest .comparison-table th { background: var(--p1); }
.theme-earthy-forest .site-footer { background: var(--p1); }
.theme-earthy-forest .cta-button { background: var(--p2); color: white !important; }

/* Theme 7: Warm Autumn - 주택, 부동산 */
.theme-warm-autumn {
    --p1: #5c2d0e; --p2: #8b4513; --p3: #cd853f; --p4: #f4a460; --p5: #fff8f0;
    --color-primary: var(--p2); --color-accent: var(--p3);
    --color-accent-light: rgba(205, 133, 63, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p3) 0%, var(--p2) 100%);
}
.theme-warm-autumn .tldr-box { background: var(--p5); border-left: 6px solid var(--p3); }
.theme-warm-autumn .tldr-box, .theme-warm-autumn .tldr-box * { color: var(--p1) !important; }
.theme-warm-autumn .tldr-label { color: var(--p3) !important; }
.theme-warm-autumn .pill { background: var(--p4); color: var(--p1) !important; }
.theme-warm-autumn .pill.highlight { background: var(--p2); color: white !important; }
.theme-warm-autumn .info-card { border-left: 4px solid var(--p3); background: var(--p5); }
.theme-warm-autumn .callout-box { background: var(--p5); border-left-color: var(--p3); }
.theme-warm-autumn .comparison-table th { background: var(--p1); }
.theme-warm-autumn .site-footer { background: var(--p1); }
.theme-warm-autumn .cta-button { background: var(--p2); color: white !important; }

/* Theme 8: Deep Sea - 투자, 자산 */
.theme-deep-sea {
    --p1: #0a3254; --p2: #0f4c81; --p3: #1a5276; --p4: #5dade2; --p5: #ebf5fb;
    --color-primary: var(--p2); --color-accent: var(--p3);
    --color-accent-light: rgba(26, 82, 118, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p3) 0%, var(--p2) 100%);
}
.theme-deep-sea .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-deep-sea .tldr-box, .theme-deep-sea .tldr-box * { color: var(--p1) !important; }
.theme-deep-sea .tldr-label { color: var(--p2) !important; }
.theme-deep-sea .pill { background: #cce5f0; color: var(--p1) !important; }
.theme-deep-sea .pill.highlight { background: var(--p4); color: var(--p1) !important; }
.theme-deep-sea .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-deep-sea .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-deep-sea .comparison-table th { background: var(--p1); }
.theme-deep-sea .site-footer { background: var(--p1); }
.theme-deep-sea .cta-button { background: var(--p2); color: white !important; }

/* Theme 9: Purple Dream - 교육, 학자금 */
.theme-purple-dream {
    --p1: #2d004d; --p2: #4b0082; --p3: #663399; --p4: #9370db; --p5: #f5f0ff;
    --color-primary: var(--p2); --color-accent: var(--p4);
    --color-accent-light: rgba(147, 112, 219, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p3) 0%, var(--p2) 100%);
}
.theme-purple-dream .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-purple-dream .tldr-box, .theme-purple-dream .tldr-box * { color: var(--p1) !important; }
.theme-purple-dream .tldr-label { color: var(--p3) !important; }
.theme-purple-dream .pill { background: #e0d4f0; color: var(--p1) !important; }
.theme-purple-dream .pill.highlight { background: var(--p4); color: white !important; }
.theme-purple-dream .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-purple-dream .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-purple-dream .comparison-table th { background: var(--p1); }
.theme-purple-dream .site-footer { background: var(--p1); }
.theme-purple-dream .cta-button { background: var(--p3); color: white !important; }

/* Theme 10: Black Gold - 프리미엄, 고급 */
.theme-black-gold {
    --p1: #0d0d0d; --p2: #1a1a1a; --p3: #2d2d2d; --p4: #ffd700; --p5: #fffef0;
    --color-primary: var(--p4); --color-accent: var(--p2);
    --color-accent-light: rgba(255, 215, 0, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p3) 0%, var(--p1) 100%);
}
.theme-black-gold .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-black-gold .tldr-box, .theme-black-gold .tldr-box * { color: var(--p1) !important; }
.theme-black-gold .tldr-label { color: var(--p4) !important; }
.theme-black-gold .pill { background: #f5e6b3; color: var(--p1) !important; }
.theme-black-gold .pill.highlight { background: var(--p4); color: var(--p1) !important; }
.theme-black-gold .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-black-gold .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-black-gold .comparison-table th { background: var(--p1); }
.theme-black-gold .site-footer { background: var(--p1); }
.theme-black-gold .cta-button { background: var(--p4); color: var(--p1) !important; }

/* Theme 11: Dark Sunset - 긴급, 데드라인 */
.theme-dark-sunset {
    --p1: #1a1a2e; --p2: #8b0000; --p3: #dc143c; --p4: #f9d923; --p5: #fffbeb;
    --color-primary: var(--p3); --color-accent: var(--p4);
    --color-accent-light: rgba(249, 217, 35, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p4) 0%, var(--p3) 100%);
}
.theme-dark-sunset .tldr-box { background: var(--p5); border-left: 6px solid var(--p3); }
.theme-dark-sunset .tldr-box, .theme-dark-sunset .tldr-box * { color: var(--p1) !important; }
.theme-dark-sunset .tldr-label { color: var(--p3) !important; }
.theme-dark-sunset .pill { background: #fde68a; color: var(--p1) !important; }
.theme-dark-sunset .pill.highlight { background: var(--p4); color: var(--p1) !important; }
.theme-dark-sunset .info-card { border-left: 4px solid var(--p3); background: var(--p5); }
.theme-dark-sunset .callout-box { background: var(--p5); border-left-color: var(--p3); }
.theme-dark-sunset .comparison-table th { background: var(--p2); }
.theme-dark-sunset .site-footer { background: var(--p1); }
.theme-dark-sunset .cta-button { background: var(--p3); color: white !important; }

/* Theme 12: Olive Garden - 자연, 농업 */
.theme-olive-garden {
    --p1: #2d3316; --p2: #4a4b2d; --p3: #8b8c5a; --p4: #a67c3b; --p5: #faf8f0;
    --color-primary: var(--p3); --color-accent: var(--p4);
    --color-accent-light: rgba(166, 124, 59, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p3) 0%, var(--p1) 100%);
}
.theme-olive-garden .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-olive-garden .tldr-box, .theme-olive-garden .tldr-box * { color: var(--p1) !important; }
.theme-olive-garden .tldr-label { color: var(--p4) !important; }
.theme-olive-garden .pill { background: #e8e0c0; color: var(--p1) !important; }
.theme-olive-garden .pill.highlight { background: var(--p4); color: white !important; }
.theme-olive-garden .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-olive-garden .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-olive-garden .comparison-table th { background: var(--p1); }
.theme-olive-garden .site-footer { background: var(--p1); }
.theme-olive-garden .cta-button { background: var(--p4); color: white !important; }

/* Legacy aliases (map to new themes) */
.theme-tax { --p1: #1e3a5f; --p2: #2c5282; --p3: #4a90a4; --p4: #87ceeb; --p5: #e8f4f8; --color-primary: var(--p1); --color-accent: var(--p3); --color-accent-light: rgba(74, 144, 164, 0.1); --color-accent-gradient: linear-gradient(135deg, var(--p2) 0%, var(--p1) 100%); }
.theme-tax .tldr-box { background: linear-gradient(135deg, var(--p1) 0%, var(--p2) 100%); }
.theme-benefits { --p1: #006666; --p2: #008b8b; --p3: #20b2aa; --p4: #7fffd4; --p5: #e0ffff; --color-primary: var(--p1); --color-accent: var(--p3); --color-accent-light: rgba(32, 178, 170, 0.1); --color-accent-gradient: linear-gradient(135deg, var(--p3) 0%, var(--p1) 100%); }
.theme-benefits .tldr-box { background: linear-gradient(135deg, var(--p1) 0%, var(--p2) 100%); }
.theme-retirement { --p1: #1a1a2e; --p2: #16213e; --p3: #0f3460; --p4: #e9b824; --p5: #fff8e7; --color-primary: var(--p4); --color-accent: var(--p3); --color-accent-light: rgba(233, 184, 36, 0.1); --color-accent-gradient: linear-gradient(135deg, var(--p2) 0%, var(--p3) 100%); }
.theme-retirement .tldr-box { background: linear-gradient(135deg, var(--p1) 0%, var(--p2) 100%); }
.theme-income { --p1: #1e3a5f; --p2: #8b1a1a; --p3: #c5281c; --p4: #f5d6ba; --p5: #fff5f0; --color-primary: var(--p3); --color-accent: var(--p1); --color-accent-light: rgba(197, 40, 28, 0.1); --color-accent-gradient: linear-gradient(135deg, var(--p1) 0%, var(--p2) 100%); }
.theme-income .tldr-box { background: linear-gradient(135deg, var(--p1) 0%, var(--p2) 100%); }

/* ================================
   LAYOUT TEMPLATES
   Usage: <body class="theme-tax layout-hero-split">
   ================================ */

/* Layout: Hero Split (Left text, Right visual) */
.layout-hero-split .tldr-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    text-align: left;
    align-items: center;
}
.layout-hero-split .tldr-box .hero-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    padding: 32px;
}
.layout-hero-split .stat-pills { justify-content: flex-start; }
@media (max-width: 768px) {
    .layout-hero-split .tldr-box { grid-template-columns: 1fr; text-align: center; }
    .layout-hero-split .stat-pills { justify-content: center; }
}

/* Layout: Number Focus (Big number hero) */
.layout-number-focus .tldr-box {
    text-align: center;
    padding: 60px 40px;
}
.layout-number-focus .big-number {
    font-size: 5rem;
    font-weight: 800;
    font-family: var(--font-heading);
    line-height: 1;
    margin-bottom: 16px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.layout-number-focus .big-number-label {
    font-size: 1.5rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 24px;
}
@media (max-width: 768px) {
    .layout-number-focus .big-number { font-size: 3.5rem; }
    .layout-number-focus .big-number-label { font-size: 1.2rem; }
}

/* Layout: Sidebar (2-column - 기존 HTML 호환) */
.layout-sidebar article,
.layout-sidebar main {
    max-width: 900px;
    margin: 0 auto;
}
.layout-sidebar .content-section {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}
.layout-sidebar .content-section h2 {
    font-size: 1.1rem;
    margin-top: 0;
    color: var(--color-accent);
    border-bottom: none;
    padding-bottom: 8px;
}
.layout-sidebar .tldr-box {
    border-radius: var(--radius-lg);
}
.layout-sidebar .info-grid {
    grid-template-columns: 1fr;
}

/* Layout: Cards Grid (Content as cards - 기존 HTML 호환) */
.layout-cards article,
.layout-cards main {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px;
}
.layout-cards .tldr-box,
.layout-cards .breadcrumb,
.layout-cards .faq-section,
.layout-cards .faq-collapsible,
.layout-cards .sources-section,
.layout-cards .disclaimer,
.layout-cards .disclaimer-box {
    grid-column: 1 / -1;
}
.layout-cards .content-section {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 0;
    transition: transform 0.2s, box-shadow 0.2s;
}
.layout-cards .content-section:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.layout-cards .content-section h2 {
    font-size: 1.15rem;
    margin-top: 0;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-accent);
}
@media (max-width: 768px) {
    .layout-cards article,
    .layout-cards main {
        grid-template-columns: 1fr;
    }
}

/* Layout: Timeline (Step-by-step content) */
.layout-timeline .timeline-container {
    position: relative;
    padding-left: 40px;
}
.layout-timeline .timeline-container::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-border);
}
.layout-timeline .timeline-item {
    position: relative;
    margin-bottom: 32px;
    padding: 24px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}
.layout-timeline .timeline-item::before {
    content: attr(data-step);
    position: absolute;
    left: -52px;
    top: 24px;
    width: 28px;
    height: 28px;
    background: var(--color-accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
}
.layout-timeline .timeline-item h3 {
    margin-bottom: 12px;
    color: var(--color-accent);
}

/* ================================
   HERO VARIANTS
   Usage: <section class="tldr-box hero-minimal">
   ================================ */

/* Hero: Minimal (Clean, less visual noise) */
.hero-minimal {
    background: var(--color-bg-alt) !important;
    color: var(--color-text) !important;
    border: 1px solid var(--color-border);
}
.hero-minimal * { color: inherit !important; }
.hero-minimal .tldr-label { color: var(--color-accent) !important; }
.hero-minimal .tldr-answer { color: var(--color-text) !important; }

/* Hero: Gradient Accent (Colorful side accent) */
.hero-gradient-accent {
    background: var(--color-bg) !important;
    color: var(--color-text) !important;
    border-left: 6px solid;
    border-image: var(--color-accent-gradient) 1;
    box-shadow: var(--shadow-md);
}
.hero-gradient-accent * { color: inherit !important; }
.hero-gradient-accent .tldr-label { color: var(--color-accent) !important; }

/* Hero: Compact (Smaller, inline style) */
.hero-compact {
    padding: 20px 24px !important;
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}
.hero-compact .tldr-label { margin-bottom: 0; }
.hero-compact .tldr-answer { font-size: 1.25rem !important; margin-bottom: 0; flex: 1; }

/* ================================
   CARD VARIANTS
   ================================ */

/* Card: Bordered (Strong border, no shadow) */
.card-bordered {
    box-shadow: none !important;
    border: 2px solid var(--color-border) !important;
}
.card-bordered:hover {
    border-color: var(--color-accent) !important;
}

/* Card: Elevated (Heavy shadow, subtle border) */
.card-elevated {
    border: none !important;
    box-shadow: 0 8px 30px rgba(0,0,0,0.12) !important;
}

/* Card: Glass (Frosted glass effect) */
.card-glass {
    background: rgba(255,255,255,0.7) !important;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.3) !important;
}

/* ================================
   MUTED TONE THEMES (NEW)
   차분하고 편안한 색조, 원색 배제
   Usage: <body class="theme-warm-sand">
   ================================ */

/* Muted Theme 1: Warm Sand - 따뜻한 모래톤 (은퇴, 연금) */
.theme-warm-sand {
    --p1: #403830; --p2: #5f5040; --p3: #9c8460; --p4: #c9a227; --p5: #faf8f5;
    --color-primary: var(--p1); --color-accent: var(--p3);
    --color-accent-light: rgba(156, 132, 96, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p3) 0%, var(--p1) 100%);
}
.theme-warm-sand .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-warm-sand .tldr-box, .theme-warm-sand .tldr-box * { color: var(--p1) !important; }
.theme-warm-sand .tldr-label { color: var(--p3) !important; }
.theme-warm-sand .pill { background: #e8dcc8; color: var(--p1) !important; }
.theme-warm-sand .pill.highlight { background: var(--p4); color: var(--p1) !important; }
.theme-warm-sand .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-warm-sand .callout-box { background: var(--p5); border-left-color: var(--p3); }
.theme-warm-sand .comparison-table th { background: var(--p1); }
.theme-warm-sand .site-footer { background: var(--p1); }
.theme-warm-sand .cta-button { background: var(--p3); color: white !important; }
.theme-warm-sand .content-section h2 { border-bottom-color: var(--p4); }

/* Muted Theme 2: Cool Slate - 차가운 슬레이트 (세금, 금융) */
.theme-cool-slate {
    --p1: #1e272f; --p2: #303c47; --p3: #5e6b78; --p4: #5a7a9a; --p5: #f8f9fa;
    --color-primary: var(--p1); --color-accent: var(--p4);
    --color-accent-light: rgba(90, 122, 154, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p4) 0%, var(--p1) 100%);
}
.theme-cool-slate .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-cool-slate .tldr-box, .theme-cool-slate .tldr-box * { color: var(--p1) !important; }
.theme-cool-slate .tldr-label { color: var(--p4) !important; }
.theme-cool-slate .pill { background: #e1e5e9; color: var(--p1) !important; }
.theme-cool-slate .pill.highlight { background: var(--p4); color: white !important; }
.theme-cool-slate .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-cool-slate .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-cool-slate .comparison-table th { background: var(--p1); }
.theme-cool-slate .site-footer { background: var(--p1); }
.theme-cool-slate .cta-button { background: var(--p4); color: white !important; }
.theme-cool-slate .content-section h2 { border-bottom-color: var(--p3); }

/* Muted Theme 3: Deep Charcoal - 깊은 차콜 (패널티, 경고) */
.theme-deep-charcoal {
    --p1: #1a1a1a; --p2: #252525; --p3: #4d4d4d; --p4: #c45c48; --p5: #f5f5f5;
    --color-primary: var(--p4); --color-accent: var(--p3);
    --color-accent-light: rgba(196, 92, 72, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p4) 0%, var(--p1) 100%);
}
.theme-deep-charcoal .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-deep-charcoal .tldr-box, .theme-deep-charcoal .tldr-box * { color: var(--p1) !important; }
.theme-deep-charcoal .tldr-label { color: var(--p4) !important; }
.theme-deep-charcoal .pill { background: #d1d1d1; color: var(--p1) !important; }
.theme-deep-charcoal .pill.highlight { background: var(--p4); color: white !important; }
.theme-deep-charcoal .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-deep-charcoal .callout-box { background: #fff5f0; border-left-color: var(--p4); }
.theme-deep-charcoal .comparison-table th { background: var(--p1); }
.theme-deep-charcoal .site-footer { background: var(--p1); }
.theme-deep-charcoal .cta-button { background: var(--p4); color: white !important; }
.theme-deep-charcoal .content-section h2 { border-bottom-color: var(--p4); }

/* Muted Theme 4: Sage Fog - 세이지 안개 (혜택, 의료) */
.theme-sage-fog {
    --p1: #202820; --p2: #324032; --p3: #607a60; --p4: #5a8a7a; --p5: #f7f9f7;
    --color-primary: var(--p1); --color-accent: var(--p4);
    --color-accent-light: rgba(90, 138, 122, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p4) 0%, var(--p1) 100%);
}
.theme-sage-fog .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-sage-fog .tldr-box, .theme-sage-fog .tldr-box * { color: var(--p1) !important; }
.theme-sage-fog .tldr-label { color: var(--p4) !important; }
.theme-sage-fog .pill { background: #dde5dd; color: var(--p1) !important; }
.theme-sage-fog .pill.highlight { background: var(--p4); color: white !important; }
.theme-sage-fog .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-sage-fog .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-sage-fog .comparison-table th { background: var(--p1); }
.theme-sage-fog .site-footer { background: var(--p1); }
.theme-sage-fog .cta-button { background: var(--p4); color: white !important; }
.theme-sage-fog .content-section h2 { border-bottom-color: var(--p4); }

/* Muted Theme 5: Dusty Rose - 먼지낀 장미 (건강보험) */
.theme-dusty-rose {
    --p1: #2a2020; --p2: #403434; --p3: #7d6464; --p4: #a07080; --p5: #faf8f8;
    --color-primary: var(--p1); --color-accent: var(--p4);
    --color-accent-light: rgba(160, 112, 128, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p4) 0%, var(--p1) 100%);
}
.theme-dusty-rose .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-dusty-rose .tldr-box, .theme-dusty-rose .tldr-box * { color: var(--p1) !important; }
.theme-dusty-rose .tldr-label { color: var(--p4) !important; }
.theme-dusty-rose .pill { background: #e8dede; color: var(--p1) !important; }
.theme-dusty-rose .pill.highlight { background: var(--p4); color: white !important; }
.theme-dusty-rose .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-dusty-rose .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-dusty-rose .comparison-table th { background: var(--p1); }
.theme-dusty-rose .site-footer { background: var(--p1); }
.theme-dusty-rose .cta-button { background: var(--p4); color: white !important; }
.theme-dusty-rose .content-section h2 { border-bottom-color: var(--p4); }

/* Muted Theme 6: Ocean Mist - 바다 안개 (투자, 재산) */
.theme-ocean-mist {
    --p1: #1e2c30; --p2: #2c4045; --p3: #527a82; --p4: #4a8090; --p5: #f5f9fa;
    --color-primary: var(--p1); --color-accent: var(--p4);
    --color-accent-light: rgba(74, 128, 144, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p4) 0%, var(--p1) 100%);
}
.theme-ocean-mist .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-ocean-mist .tldr-box, .theme-ocean-mist .tldr-box * { color: var(--p1) !important; }
.theme-ocean-mist .tldr-label { color: var(--p4) !important; }
.theme-ocean-mist .pill { background: #d5e5e8; color: var(--p1) !important; }
.theme-ocean-mist .pill.highlight { background: var(--p4); color: white !important; }
.theme-ocean-mist .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-ocean-mist .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-ocean-mist .comparison-table th { background: var(--p1); }
.theme-ocean-mist .site-footer { background: var(--p1); }
.theme-ocean-mist .cta-button { background: var(--p4); color: white !important; }
.theme-ocean-mist .content-section h2 { border-bottom-color: var(--p4); }

/* Muted Theme 7: Lavender Haze - 라벤더 안개 (교육, 학자금) */
.theme-lavender-haze {
    --p1: #2d2640; --p2: #3d3555; --p3: #6b5b7a; --p4: #8a7a9a; --p5: #f8f7fa;
    --color-primary: var(--p1); --color-accent: var(--p4);
    --color-accent-light: rgba(138, 122, 154, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p4) 0%, var(--p1) 100%);
}
.theme-lavender-haze .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-lavender-haze .tldr-box, .theme-lavender-haze .tldr-box * { color: var(--p1) !important; }
.theme-lavender-haze .tldr-label { color: var(--p4) !important; }
.theme-lavender-haze .pill { background: #e5e0ea; color: var(--p1) !important; }
.theme-lavender-haze .pill.highlight { background: var(--p4); color: white !important; }
.theme-lavender-haze .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-lavender-haze .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-lavender-haze .comparison-table th { background: var(--p1); }
.theme-lavender-haze .site-footer { background: var(--p1); }
.theme-lavender-haze .cta-button { background: var(--p4); color: white !important; }
.theme-lavender-haze .content-section h2 { border-bottom-color: var(--p4); }

/* Muted Theme 8: Terracotta - 테라코타 (주택, 부동산) */
.theme-terracotta {
    --p1: #3d2b24; --p2: #5a4035; --p3: #8b6b5a; --p4: #c4826a; --p5: #faf6f4;
    --color-primary: var(--p1); --color-accent: var(--p4);
    --color-accent-light: rgba(196, 130, 106, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p4) 0%, var(--p1) 100%);
}
.theme-terracotta .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-terracotta .tldr-box, .theme-terracotta .tldr-box * { color: var(--p1) !important; }
.theme-terracotta .tldr-label { color: var(--p4) !important; }
.theme-terracotta .pill { background: #e8dcd6; color: var(--p1) !important; }
.theme-terracotta .pill.highlight { background: var(--p4); color: white !important; }
.theme-terracotta .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-terracotta .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-terracotta .comparison-table th { background: var(--p1); }
.theme-terracotta .site-footer { background: var(--p1); }
.theme-terracotta .cta-button { background: var(--p4); color: white !important; }
.theme-terracotta .content-section h2 { border-bottom-color: var(--p4); }

/* Muted Theme 9: Moss Stone - 이끼낀 돌 (환경, 저축) */
.theme-moss-stone {
    --p1: #2a3028; --p2: #3d453a; --p3: #5a6b55; --p4: #7a9070; --p5: #f6f8f5;
    --color-primary: var(--p1); --color-accent: var(--p4);
    --color-accent-light: rgba(122, 144, 112, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p4) 0%, var(--p1) 100%);
}
.theme-moss-stone .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-moss-stone .tldr-box, .theme-moss-stone .tldr-box * { color: var(--p1) !important; }
.theme-moss-stone .tldr-label { color: var(--p4) !important; }
.theme-moss-stone .pill { background: #dce5d8; color: var(--p1) !important; }
.theme-moss-stone .pill.highlight { background: var(--p4); color: white !important; }
.theme-moss-stone .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-moss-stone .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-moss-stone .comparison-table th { background: var(--p1); }
.theme-moss-stone .site-footer { background: var(--p1); }
.theme-moss-stone .cta-button { background: var(--p4); color: white !important; }
.theme-moss-stone .content-section h2 { border-bottom-color: var(--p4); }

/* Muted Theme 10: Steel Blue - 스틸 블루 (고용, 근로) */
.theme-steel-blue {
    --p1: #1f2937; --p2: #374151; --p3: #4b5563; --p4: #6b8cae; --p5: #f9fafb;
    --color-primary: var(--p1); --color-accent: var(--p4);
    --color-accent-light: rgba(107, 140, 174, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p4) 0%, var(--p1) 100%);
}
.theme-steel-blue .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-steel-blue .tldr-box, .theme-steel-blue .tldr-box * { color: var(--p1) !important; }
.theme-steel-blue .tldr-label { color: var(--p4) !important; }
.theme-steel-blue .pill { background: #e5e7eb; color: var(--p1) !important; }
.theme-steel-blue .pill.highlight { background: var(--p4); color: white !important; }
.theme-steel-blue .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-steel-blue .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-steel-blue .comparison-table th { background: var(--p1); }
.theme-steel-blue .site-footer { background: var(--p1); }
.theme-steel-blue .cta-button { background: var(--p4); color: white !important; }
.theme-steel-blue .content-section h2 { border-bottom-color: var(--p4); }

/* Muted Theme 11: Burnt Amber - 번트 앰버 (긴급, 마감) */
.theme-burnt-amber {
    --p1: #2d2418; --p2: #4a3c28; --p3: #7a6040; --p4: #b8860b; --p5: #faf8f2;
    --color-primary: var(--p1); --color-accent: var(--p4);
    --color-accent-light: rgba(184, 134, 11, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p4) 0%, var(--p1) 100%);
}
.theme-burnt-amber .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-burnt-amber .tldr-box, .theme-burnt-amber .tldr-box * { color: var(--p1) !important; }
.theme-burnt-amber .tldr-label { color: var(--p4) !important; }
.theme-burnt-amber .pill { background: #ebe0c8; color: var(--p1) !important; }
.theme-burnt-amber .pill.highlight { background: var(--p4); color: var(--p1) !important; }
.theme-burnt-amber .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-burnt-amber .callout-box { background: #fff8e8; border-left-color: var(--p4); }
.theme-burnt-amber .comparison-table th { background: var(--p1); }
.theme-burnt-amber .site-footer { background: var(--p1); }
.theme-burnt-amber .cta-button { background: var(--p4); color: var(--p1) !important; }
.theme-burnt-amber .content-section h2 { border-bottom-color: var(--p4); }

/* Muted Theme 12: Midnight Navy - 미드나잇 네이비 (프리미엄, VIP) */
.theme-midnight-navy {
    --p1: #0f172a; --p2: #1e293b; --p3: #334155; --p4: #64748b; --p5: #f8fafc;
    --color-primary: var(--p1); --color-accent: var(--p4);
    --color-accent-light: rgba(100, 116, 139, 0.1);
    --color-accent-gradient: linear-gradient(135deg, var(--p4) 0%, var(--p1) 100%);
}
.theme-midnight-navy .tldr-box { background: var(--p5); border-left: 6px solid var(--p4); }
.theme-midnight-navy .tldr-box, .theme-midnight-navy .tldr-box * { color: var(--p1) !important; }
.theme-midnight-navy .tldr-label { color: var(--p4) !important; }
.theme-midnight-navy .pill { background: #e2e8f0; color: var(--p1) !important; }
.theme-midnight-navy .pill.highlight { background: var(--p4); color: white !important; }
.theme-midnight-navy .info-card { border-left: 4px solid var(--p4); background: var(--p5); }
.theme-midnight-navy .callout-box { background: var(--p5); border-left-color: var(--p4); }
.theme-midnight-navy .comparison-table th { background: var(--p1); }
.theme-midnight-navy .site-footer { background: var(--p1); }
.theme-midnight-navy .cta-button { background: var(--p4); color: white !important; }
.theme-midnight-navy .content-section h2 { border-bottom-color: var(--p4); }

/* ================================
   ADVANCED LAYOUT VARIATIONS (NEW)
   비정형적 레이아웃과 모던 인터랙션
   ================================ */

/* Layout: Tracing Line (좌측 트레이싱 라인 - 기존 HTML 호환) */
.layout-tracing-line article,
.layout-tracing-line main,
.layout-tracing-line .content-container {
    position: relative;
    padding-left: 50px;
    max-width: 850px;
    margin: 0 auto;
}
.layout-tracing-line article::before,
.layout-tracing-line main::before,
.layout-tracing-line .content-container::before {
    content: '';
    position: absolute;
    left: 16px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg,
        var(--color-accent) 0%,
        var(--color-accent-light) 50%,
        transparent 100%);
}
.layout-tracing-line .content-section {
    position: relative;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--color-border);
}
.layout-tracing-line .content-section::before {
    content: '';
    position: absolute;
    left: -42px;
    top: 28px;
    width: 10px;
    height: 10px;
    background: var(--color-accent);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--color-accent-light);
}
.layout-tracing-line .content-section h2 {
    padding-left: 0;
    border-bottom: none;
    margin-top: 0;
}
.layout-tracing-line .tldr-box {
    margin-left: -50px;
    padding-left: 50px;
}
@media (max-width: 768px) {
    .layout-tracing-line article,
    .layout-tracing-line main,
    .layout-tracing-line .content-container {
        padding-left: 24px;
    }
    .layout-tracing-line article::before,
    .layout-tracing-line main::before,
    .layout-tracing-line .content-container::before {
        display: none;
    }
    .layout-tracing-line .content-section::before {
        display: none;
    }
    .layout-tracing-line .tldr-box {
        margin-left: 0;
        padding-left: 24px;
    }
}

/* Layout: Bento Grid (비정형 그리드) - article/main 직접 타겟 */
.layout-bento article,
.layout-bento main,
.layout-bento .content-sections {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: minmax(auto, auto);
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
    padding: 24px;
}
.layout-bento .tldr-box,
.layout-bento .breadcrumb,
.layout-bento .faq-section,
.layout-bento .faq-collapsible,
.layout-bento .sources-section,
.layout-bento .disclaimer,
.layout-bento .disclaimer-box {
    grid-column: span 2;
}
.layout-bento .content-section {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 0;
}
.layout-bento .content-section h2 {
    font-size: 1.1rem;
    margin-top: 0;
    border-bottom: none;
    padding-bottom: 8px;
}
@media (max-width: 768px) {
    .layout-bento article,
    .layout-bento main,
    .layout-bento .content-sections {
        grid-template-columns: 1fr;
    }
    .layout-bento .tldr-box,
    .layout-bento .breadcrumb,
    .layout-bento .faq-section,
    .layout-bento .faq-collapsible,
    .layout-bento .sources-section,
    .layout-bento .disclaimer,
    .layout-bento .disclaimer-box {
        grid-column: span 1;
    }
}

/* Layout: Asymmetric (비대칭 레이아웃) */
.layout-asymmetric .content-container {
    max-width: 1000px;
}
.layout-asymmetric .content-section:nth-child(odd) {
    margin-left: 0;
    margin-right: 15%;
}
.layout-asymmetric .content-section:nth-child(even) {
    margin-left: 15%;
    margin-right: 0;
}
.layout-asymmetric .content-section {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}
@media (max-width: 768px) {
    .layout-asymmetric .content-section:nth-child(odd),
    .layout-asymmetric .content-section:nth-child(even) {
        margin-left: 0;
        margin-right: 0;
    }
}

/* Layout: Magazine (잡지 스타일) */
.layout-magazine .content-container {
    max-width: 900px;
}
.layout-magazine .tldr-box {
    font-size: 1.1rem;
    line-height: 1.8;
    padding: 48px;
}
.layout-magazine .content-section:first-of-type::first-letter {
    font-size: 4rem;
    font-weight: 700;
    float: left;
    line-height: 1;
    margin-right: 12px;
    color: var(--color-accent);
}
.layout-magazine blockquote {
    font-size: 1.5rem;
    font-style: italic;
    border-left: 4px solid var(--color-accent);
    padding-left: 24px;
    margin: 32px 0;
    color: var(--color-text-light);
}

/* ================================
   INTERACTIVE EFFECTS (NEW)
   호버 보더 그라데이션 등 모던 효과
   ================================ */

/* Hover Border Gradient Effect */
.hover-border-gradient {
    position: relative;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 24px;
    overflow: hidden;
    transition: transform 0.3s ease;
}
.hover-border-gradient::before {
    content: '';
    position: absolute;
    inset: 0;
    padding: 2px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, transparent, transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    transition: background 0.3s ease;
}
.hover-border-gradient:hover::before {
    background: var(--color-accent-gradient);
}
.hover-border-gradient:hover {
    transform: translateY(-4px);
}

/* Glow Effect on Hover */
.hover-glow {
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.hover-glow:hover {
    box-shadow: 0 0 30px var(--color-accent-light), 0 8px 30px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

/* Animated Underline */
.animated-underline {
    position: relative;
    display: inline-block;
}
.animated-underline::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width 0.3s ease;
}
.animated-underline:hover::after {
    width: 100%;
}

/* Sparkle Effect (CSS-only) */
@keyframes sparkle {
    0%, 100% { opacity: 0; transform: scale(0); }
    50% { opacity: 1; transform: scale(1); }
}
.sparkle-container {
    position: relative;
}
.sparkle-container::before,
.sparkle-container::after {
    content: '✦';
    position: absolute;
    font-size: 0.75rem;
    color: var(--color-accent);
    opacity: 0;
    animation: sparkle 2s infinite;
}
.sparkle-container::before {
    top: -8px;
    right: -8px;
    animation-delay: 0s;
}
.sparkle-container::after {
    bottom: -8px;
    left: -8px;
    animation-delay: 1s;
}

/* Big Number with Animation */
.big-number-animated {
    font-size: 5rem;
    font-weight: 800;
    font-family: var(--font-heading);
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse-subtle 3s infinite;
}
@keyframes pulse-subtle {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

/* Icon with Opacity Control */
.icon-muted { opacity: 0.4; }
.icon-soft { opacity: 0.6; }
.icon-medium { opacity: 0.75; }
.icon-full { opacity: 1; }

/* ================================
   ASYMMETRIC SPACING UTILITIES
   비정형 간격을 위한 유틸리티
   ================================ */
.mt-odd { margin-top: 73px; }
.mb-odd { margin-bottom: 42px; }
.ml-offset { margin-left: 7%; }
.mr-offset { margin-right: 7%; }
.pt-lg { padding-top: 13vh; }
.pb-lg { padding-bottom: 8vh; }

/* Staggered Grid */
.staggered-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.staggered-grid > *:nth-child(3n+2) {
    transform: translateY(30px);
}
.staggered-grid > *:nth-child(3n+3) {
    transform: translateY(60px);
}
@media (max-width: 768px) {
    .staggered-grid {
        grid-template-columns: 1fr;
    }
    .staggered-grid > *:nth-child(3n+2),
    .staggered-grid > *:nth-child(3n+3) {
        transform: translateY(0);
    }
}

/* Scroll-triggered Fade In (CSS-only with IntersectionObserver backup) */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in-section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Drag Hint Animation */
@keyframes drag-hint {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(10px); }
}
.drag-hint::after {
    content: '← drag →';
    display: block;
    text-align: center;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 8px;
    animation: drag-hint 2s infinite;
}

/* ================================
   ADDITIONAL LAYOUTS (10-12)
   12개 레이아웃 시스템 완성
   ================================ */

/* Layout 10: Floating Cards - 떠있는 카드 */
.layout-floating .content-section {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08), 0 2px 10px rgba(0,0,0,0.04);
    border: none;
    margin-bottom: 32px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.layout-floating .content-section:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.12), 0 4px 20px rgba(0,0,0,0.06);
}
.layout-floating .content-section h2 {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 20px;
    color: var(--color-accent);
}
.layout-floating .tldr-box {
    box-shadow: 0 15px 50px rgba(0,0,0,0.1);
    border-radius: var(--radius-lg);
}
.layout-floating .info-card {
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    border: none;
}

/* Layout 11: Split Content - 2단 분리 */
.layout-split article,
.layout-split main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px;
}
.layout-split .tldr-box,
.layout-split .breadcrumb,
.layout-split .faq-section,
.layout-split .faq-collapsible,
.layout-split .sources-section,
.layout-split .disclaimer,
.layout-split .disclaimer-box {
    grid-column: span 2;
}
.layout-split .content-section {
    background: var(--color-bg);
    padding: 28px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    margin-bottom: 0;
}
.layout-split .content-section h2 {
    font-size: 1.15rem;
    margin-top: 0;
    border-bottom: none;
}
@media (max-width: 768px) {
    .layout-split article,
    .layout-split main {
        grid-template-columns: 1fr;
    }
    .layout-split .tldr-box,
    .layout-split .breadcrumb,
    .layout-split .faq-section,
    .layout-split .faq-collapsible,
    .layout-split .sources-section,
    .layout-split .disclaimer,
    .layout-split .disclaimer-box {
        grid-column: span 1;
    }
}

/* Layout 12: Minimal Clean - 최소 디자인 */
.layout-minimal .content-container {
    max-width: 720px;
}
.layout-minimal .tldr-box {
    background: transparent !important;
    border: none !important;
    border-left: 4px solid var(--color-accent) !important;
    padding: 24px 32px;
    margin-bottom: 48px;
}
.layout-minimal .content-section {
    border: none;
    padding: 0;
    margin-bottom: 48px;
}
.layout-minimal .content-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 16px;
}
.layout-minimal .info-card {
    background: transparent;
    border: none;
    border-left: 2px solid var(--color-border);
    border-radius: 0;
    padding: 16px 24px;
}
.layout-minimal .comparison-table {
    box-shadow: none;
    border: 1px solid var(--color-border);
}
.layout-minimal .faq-item {
    border-bottom: 1px solid var(--color-border);
}
.layout-minimal .site-footer {
    background: transparent;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
}
.layout-minimal .site-footer * {
    color: var(--color-text-muted);
}