/* [APEX-TIER] ABSOLUTE SCROLL PROTECTION */
html, body {
  max-width: 100vw !important;
  overflow-x: hidden !important;
}
* {
  box-sizing: border-box !important;
}

/* ═══════════════════════════════════════════════════
   PROOF & VALUE — COLUMN SHARED STYLE SYSTEM v2.0
   Part 1: Design Tokens + Core Layout
═══════════════════════════════════════════════════ */

:root {
  /* [APEX-TIER] Modern Fintech Teal Design System */
  /* Backgrounds */
  --bg:    #121212;
  --bg1:   #18181B;
  --bg2:   #27272A;
  --bg3:   #3F3F46;

  /* Primary Accents (Teal) */
  --primary:       #14B8A6;
  --primary-hover: #0D9488;
  --primary-light: #5EEAD4;
  --primary-glow:  0 0 30px rgba(20, 184, 166, 0.15);

  /* Secondary Accents (Cyan) */
  --accent:        #0891B2;
  --accent-g:      rgba(8, 145, 178, 0.18);

  /* Typography / Text */
  --t1: #F8FAFC; /* Slate 50 */
  --t2: #E4E4E7; /* Zinc 200 */
  --t3: #A1A1AA; /* Zinc 400 */
  --t4: #52525B; /* Zinc 600 */

  /* Borders */
  --br:   rgba(255, 255, 255, 0.05);
  --br-g: rgba(20, 184, 166, 0.22);
  --br-a: rgba(8, 145, 178, 0.22);

  /* Typography Stacks */
  --ff-serif: 'Noto Serif KR', serif;
  --ff-sans:  'Noto Sans KR', sans-serif;
  --ff-mono:  'DM Mono', monospace;
  --ff-disp:  'Bebas Neue', sans-serif;

  /* Motion Curves */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-std: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { word-break: keep-all; overflow-wrap: break-word; word-break: keep-all; overflow-wrap: break-word;
  word-break: keep-all;
  overflow-wrap: break-word;

  font-family: var(--ff-sans);
  background: var(--bg);
  color: var(--t1);
  line-height: 1.8;
  
  cursor: none;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }





/* ── Custom Cursor ── */
#cur {
  position: fixed; width: 8px; height: 8px;
  background: #fff; border-radius: 50%;
  pointer-events: none; z-index: 9999;
  mix-blend-mode: difference;
}
#cur2 {
  position: fixed; width: 36px; height: 36px;
  border: 1px solid rgba(255,255,255,0.28);
  border-radius: 50%; pointer-events: none; z-index: 9998;
  transition: width .25s, height .25s, border-color .25s;
}
#cur2.hover { width: 48px; height: 48px; border-color: rgba(255,255,255,0.7); }

/* ── Read Progress ── */
#read-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--gold-b));
  z-index: 9999;
  
  transition: width .1s linear;
}

/* ── Grain Overlay ── */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='g'%3E%3CfeTurbulence baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23g)' opacity='0.04'/%3E%3C/svg%3E");
  background-size: 200px; opacity: 0.4; mix-blend-mode: overlay;
}

/* ════════════ NAVIGATION ════════════ */
.c-nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 200; padding: 22px 56px;
  display: flex; justify-content: space-between; align-items: center;
  transition: background .4s, border-color .4s;
}
.c-nav.scrolled {
  background: rgba(7,8,11,0.92);
  border-bottom: 1px solid var(--br);
  backdrop-filter: blur(20px);
}
.c-nav-logo {
  font-family: var(--ff-serif); font-size: 17px; font-weight: 700;
  letter-spacing: -.01em;
}
.c-nav-logo span { color: var(--primary); }
.c-nav-links { display: flex; gap: 28px; list-style: none; }
.c-nav-links a {
  font-size: 12px; color: var(--t3); letter-spacing: .06em;
  transition: color .2s;
}
.c-nav-links a:hover, .c-nav-links a.on { color: var(--t1); }
.c-nav-cta {
  font-size: 11px; letter-spacing: .1em; text-transform: uppercase;
  padding: 9px 22px;
  background: var(--primary); color: #000; font-weight: 700;
  border-radius: 2px; transition: background .2s;
}
.c-nav-cta:hover { background: var(--gold-b); }

/* ════════════ HERO ════════════ */
.c-hero {
  min-height: 70vh; padding: 160px 56px 80px;
  border-bottom: 1px solid var(--br);
  position: relative; overflow: hidden;
  display: flex; flex-direction: column; justify-content: flex-end;
}
.c-hero-bg {
  position: absolute; inset: 0; z-index: 0;
}
.c-hero-bg img {
  width: 100%; height: 100%; object-fit: cover;
  opacity: 0.18; filter: grayscale(60%);
}
.c-hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to top, var(--bg) 30%, transparent 80%);
}
.c-hero-inner { position: relative; z-index: 2; max-width: 820px; }
.c-breadcrumb {
  font-size: 11px; font-family: var(--ff-mono); color: var(--t3);
  letter-spacing: .06em; margin-bottom: 20px;
  display: flex; align-items: center; gap: 8px;
}
.c-breadcrumb a { color: var(--t3); transition: color .2s; }
.c-breadcrumb a:hover { color: var(--t1); }
.c-breadcrumb-sep { opacity: .4; }
.c-hero-eyebrow {
  font-family: var(--ff-mono); font-size: 10px; letter-spacing: .22em;
  text-transform: uppercase; color: var(--primary);
  margin-bottom: 20px;
  display: flex; align-items: center; gap: 10px;
}
.c-hero-eyebrow::before {
  content: ''; width: 24px; height: 1px;
  background: var(--primary);
}
.c-hero-h1 {
  font-family: var(--ff-serif);
  font-size: clamp(28px, 4.5vw, 60px);
  font-weight: 700; line-height: 1.2;
  letter-spacing: -.02em; margin-bottom: 24px;
}
.c-hero-h1 em { font-style: italic; color: var(--primary); }
.c-hero-h1 strong { font-weight: 900; }
.c-hero-lead {
  font-size: 16px; color: var(--t2); line-height: 1.85;
  max-width: 640px; margin-bottom: 32px;
}
.c-hero-meta {
  display: flex; flex-wrap: wrap; gap: 6px;
  align-items: center;
  font-family: var(--ff-mono); font-size: 10px; color: var(--t3);
  letter-spacing: .08em;
  padding-top: 24px; border-top: 1px solid var(--br);
}
.c-meta-sep { opacity: .3; }
.c-tag-chip {
  display: inline-block; padding: 3px 10px;
  border: 1px solid var(--br); border-radius: 100px;
  font-family: var(--ff-mono); font-size: 9px;
  color: var(--t3); letter-spacing: .1em; text-transform: uppercase;
  transition: border-color .2s, color .2s;
}
.c-tag-chip:hover { border-color: var(--primary); color: var(--primary); }

/* ════════════ LEARNING OBJECTIVES BOX ════════════ */
.c-learn-box {
  background: var(--bg2); border: 1px solid var(--br-g);
  border-left: 3px solid var(--primary);
  border-radius: 10px; padding: 28px 32px; margin: 48px 0;
}
.c-learn-label {
  font-family: var(--ff-mono); font-size: 9px; letter-spacing: .22em;
  text-transform: uppercase; color: var(--primary); margin-bottom: 14px;
}
.c-learn-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.c-learn-list li {
  font-size: 14px; color: var(--t2); display: flex; gap: 12px; line-height: 1.6;
}
.c-learn-list li::before {
  content: '→'; color: var(--primary); font-family: var(--ff-mono); flex-shrink: 0;
}

/* ════════════ TL;DR VERDICT BOX ════════════ */
.c-verdict {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--br-g); border-left: 3px solid var(--primary);
  border-radius: 10px; padding: 28px 32px; margin: 48px 0;
}
.c-verdict-label {
  font-family: var(--ff-mono); font-size: 9px; letter-spacing: .22em;
  text-transform: uppercase; color: var(--primary); margin-bottom: 14px;
}
.c-verdict-body {
  font-size: 15px; color: var(--t2); line-height: 2;
}
.c-verdict-body strong { color: var(--gold-b); }

/* ════════════ TOC ════════════ */
.c-toc {
  background: var(--bg2); border: 1px solid var(--br);
  border-radius: 10px; padding: 28px 32px; margin: 40px 0;
}
.c-toc-label {
  font-family: var(--ff-mono); font-size: 9px; letter-spacing: .22em;
  text-transform: uppercase; color: var(--t3); margin-bottom: 16px;
}
.c-toc ol { padding-left: 20px; display: flex; flex-direction: column; gap: 8px; }
.c-toc li { font-size: 13px; color: var(--t3); }
.c-toc a { color: var(--t3); transition: color .2s; }
.c-toc a:hover { color: var(--primary); }
.c-toc-progress {
  margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--br);
}
.c-toc-track { height: 2px; background: var(--bg3); border-radius: 1px; overflow: hidden; }
.c-toc-fill {
  height: 100%; background: linear-gradient(90deg, var(--primary), var(--gold-b));
  width: 0%; transition: width .3s var(--ease-std);
  
}
.c-toc-pct {
  font-family: var(--ff-mono); font-size: 9px; color: var(--primary);
  margin-top: 6px; letter-spacing: .1em;
}

/* ════════════ LAYOUT: MAIN + SIDEBAR ════════════ */
.c-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 0;
  max-width: 1260px;
  margin: 0 auto;
}
.c-main {
  padding: 72px 64px 96px;
  border-right: 1px solid var(--br);
  min-width: 0;
}
.c-sidebar {
  padding: 72px 40px;
  position: -webkit-sticky; position: sticky; top: 80px;
  height: max-content; align-self: flex-start;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  box-sizing: border-box;
}

/* Sidebar Scrollbar Styling */
.c-sidebar
.c-sidebar
.c-sidebar
.c-sidebar
.c-sidebar-block { margin-bottom: 36px; }
.c-sidebar-label {
  font-family: var(--ff-mono); font-size: 9px; letter-spacing: .22em;
  text-transform: uppercase; color: var(--t3); margin-bottom: 14px;
}
.c-sidebar-item {
  font-size: 12px; color: var(--t3); line-height: 1.7;
  margin-bottom: 8px; padding-left: 12px;
  border-left: 1px solid var(--br);
  transition: color .2s, border-color .2s;
}
.c-sidebar-item:hover { color: var(--t1); border-color: var(--primary); }
.c-sidebar-item a { color: inherit; transition: color .2s; }
.c-sidebar-cta {
  display: block; border: 1px solid var(--br-g); padding: 20px;
  border-radius: 8px; font-size: 12px; color: var(--t2); line-height: 1.8;
  transition: border-color .2s, background .2s;
}
.c-sidebar-cta:hover { border-color: var(--primary); background: var(--gold-d); }
.c-sidebar-cta strong { color: var(--t1); font-size: 13px; display: block; margin-top: 8px; }

/* ════════════ ARTICLE BODY ════════════ */
.c-article { font-size: 16px; line-height: 2.0; color: var(--t2); font-weight: 300; }
.c-article > * + * { margin-top: 24px; }
.c-article h2 {
  font-family: var(--ff-serif);
  font-size: clamp(22px, 2.8vw, 34px); font-weight: 700;
  color: var(--t1); letter-spacing: -.02em; line-height: 1.3;
  margin-top: 80px; margin-bottom: 20px;
  padding-bottom: 16px; border-bottom: 1px solid var(--br);
}
.c-article h3 {
  font-family: var(--ff-serif);
  font-size: clamp(18px, 2vw, 24px); font-weight: 600;
  color: var(--t1); letter-spacing: -.01em;
  margin-top: 56px; margin-bottom: 14px;
}
.c-article h4 {
  font-size: 16px; font-weight: 600; color: var(--t1);
  margin-top: 36px; margin-bottom: 10px;
}
.c-article p { margin-bottom: 20px; }
.c-article strong { color: var(--gold-b); font-weight: 600; }
.c-article em { font-style: italic; color: var(--t2); }
.c-article ul, .c-article ol { padding-left: 24px; margin-bottom: 20px; }
.c-article li { margin-bottom: 8px; }
.c-article a { color: var(--primary); border-bottom: 1px solid transparent; transition: border-color .2s; }
.c-article a:hover { border-color: var(--primary); }

/* Article inline image */
.c-article .c-img {
  margin: 48px 0; border-radius: 6px; overflow: hidden;
  border: 1px solid var(--br);
}
.c-article .c-img img { width: 100%; }
.c-article .c-img-cap {
  font-family: var(--ff-mono); font-size: 10px; color: var(--t3);
  letter-spacing: .08em; padding: 12px 16px;
  border-top: 1px solid var(--br); text-align: center;
}

/* Blockquote */
.c-article blockquote {
  border-left: 2px solid var(--primary); padding: 20px 28px;
  margin: 40px 0; background: var(--gold-d); border-radius: 0 8px 8px 0;
  font-size: 16px; font-style: italic; color: var(--t1); line-height: 1.85;
}
.c-article blockquote cite {
  display: block; margin-top: 12px;
  font-size: 11px; font-style: normal; font-family: var(--ff-mono);
  color: var(--t3); letter-spacing: .06em;
}

/* Pull Quote — large editorial callout */
.c-pull-quote {
  margin: 64px -20px; padding: 40px 48px;
  border-top: 1px solid var(--br-g); border-bottom: 1px solid var(--br-g);
  text-align: center;
}
.c-pull-quote-text {
  font-family: var(--ff-serif);
  font-size: clamp(20px, 3vw, 32px); font-weight: 700;
  color: var(--t1); line-height: 1.4; letter-spacing: -.02em;
}
.c-pull-quote-text em { color: var(--primary); font-style: italic; }
.c-pull-quote-src {
  margin-top: 14px; font-family: var(--ff-mono);
  font-size: 10px; color: var(--t3); letter-spacing: .12em; text-transform: uppercase;
}

/* Section divider */
.c-divider {
  height: 1px; margin: 64px 0;
  background: linear-gradient(90deg, transparent, var(--br) 30%, var(--br) 70%, transparent);
}

/* ════════════ DATA BLOCK ════════════ */
.c-data {
  border: 1px solid var(--br); border-radius: 10px;
  padding: 28px 32px; margin: 40px 0;
  background: var(--bg2); position: relative; overflow: hidden;
}
.c-data::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, var(--primary), transparent);
}
.c-data-label {
  font-family: var(--ff-mono); font-size: 9px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--t3); margin-bottom: 10px;
}
.c-data-title {
  font-family: var(--ff-serif); font-size: 18px; font-weight: 700;
  color: var(--t1); margin-bottom: 16px; letter-spacing: -.01em;
}
.c-data-body { font-size: 14px; color: var(--t2); line-height: 2.0; }
.c-data-body strong { color: var(--t1); }

/* ════════════ COMPARISON GRID ════════════ */
.c-compare {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1px; background: var(--br); margin: 40px 0;
  border-radius: 10px; overflow: hidden;
  border: 1px solid var(--br);
}
.c-compare-cell { background: var(--bg); padding: 22px 26px; }
.c-compare-cell.header {
  background: var(--bg2);
  font-family: var(--ff-mono); font-size: 9px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--t3);
}
.c-compare-cell.highlight { background: rgba(255,255,255,0.04); }
.c-compare-label { font-size: 11px; color: var(--t3); margin-bottom: 6px; }
.c-compare-val {
  font-family: var(--ff-mono); font-size: 22px; font-weight: 500;
  color: var(--t1); line-height: 1;
}
.c-compare-val.gold { color: var(--gold-b); text-shadow: 0 0 20px rgba(255,255,255,0.3); }
.c-compare-sub { font-size: 12px; color: var(--t3); margin-top: 5px; line-height: 1.6; }

/* ════════════ STAT CARDS ════════════ */
.c-stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 12px; margin: 40px 0;
}
.c-stat {
  background: var(--bg2); border: 1px solid var(--br);
  border-radius: 10px; padding: 24px 20px;
  text-align: center; position: relative; overflow: hidden;
  transition: border-color .3s, transform .3s var(--ease-out);
}
.c-stat:hover { border-color: var(--br-g); transform: translateY(-4px); }
.c-stat::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--gold-b));
  transform: scaleX(0); transform-origin: left; transition: transform .4s var(--ease-out);
}
.c-stat:hover::after { transform: scaleX(1); }
.c-stat-val {
  font-family: var(--ff-mono); font-size: 36px; font-weight: 500;
  color: var(--gold-b); display: block; line-height: 1; margin-bottom: 8px;
  text-shadow: 0 0 30px rgba(255,255,255,0.3);
}
.c-stat-label { font-size: 13px; font-weight: 500; color: var(--t1); margin-bottom: 4px; }
.c-stat-desc { font-family: var(--ff-mono); font-size: 10px; color: var(--t3); }

/* ════════════ SVG CHART CONTAINER ════════════ */
.c-chart-wrap { margin: 40px 0; }
.c-chart-legend {
  display: flex; gap: 20px; margin-bottom: 16px; flex-wrap: wrap;
}
.c-chart-legend-item {
  display: flex; align-items: center; gap: 7px;
  font-family: var(--ff-mono); font-size: 10px;
  color: var(--t3); letter-spacing: .08em; text-transform: uppercase;
}
.c-chart-legend-dot { width: 10px; height: 10px; border-radius: 2px; }
.c-chart-container {
  background: var(--bg2); border: 1px solid var(--br);
  border-radius: 10px; padding: 24px; overflow: hidden;
}

/* ════════════ PHASE BLOCKS ════════════ */
.c-phase {
  border: 1px solid var(--br); border-radius: 10px;
  padding: 28px 32px; margin: 16px 0;
  position: relative; overflow: hidden;
  transition: border-color .3s;
}
.c-phase:hover { border-color: var(--br-g); }
.c-phase::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--primary), transparent);
}
.c-phase-num {
  font-family: var(--ff-mono); font-size: 9px; letter-spacing: .2em;
  text-transform: uppercase; color: var(--t3); margin-bottom: 8px;
}
.c-phase-title {
  font-family: var(--ff-serif); font-size: 18px; font-weight: 700;
  color: var(--t1); margin-bottom: 12px; letter-spacing: -.01em;
}
.c-phase-body { font-size: 14px; color: var(--t2); line-height: 1.9; }
.c-phase-body strong { color: var(--t1); }
.c-phase-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.c-phase-chip {
  font-family: var(--ff-mono); font-size: 10px; color: var(--t2);
  background: var(--bg3); border: 1px solid var(--br);
  border-radius: 6px; padding: 3px 10px; letter-spacing: .04em;
}

/* ════════════ CHECKLIST ════════════ */
.c-checklist { list-style: none; margin: 24px 0; }
.c-checklist li {
  padding: 11px 0; border-bottom: 1px solid var(--br);
  font-size: 14px; color: var(--t2);
  display: flex; gap: 14px; align-items: flex-start; line-height: 1.65;
}
.c-checklist li:last-child { border-bottom: none; }
.c-checklist li::before {
  content: '✓'; color: var(--primary); font-family: var(--ff-mono);
  flex-shrink: 0; margin-top: 1px; font-weight: 700;
}
.c-checklist li.no::before { content: '✗'; color: var(--t3); }
.c-checklist li.no { color: var(--t3); }

/* ════════════ INLINE CTA ════════════ */
.c-cta-inline {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
  border: 1px solid var(--br-g); border-radius: 10px;
  padding: 28px 32px; margin: 48px 0;
  background: var(--gold-d);
}
.c-cta-inline-text { font-size: 15px; color: var(--t2); line-height: 1.7; }
.c-cta-inline-text strong { color: var(--t1); }
.c-cta-inline-text small {
  display: block; font-size: 12px; font-family: var(--ff-mono);
  color: var(--t3); margin-top: 5px;
}
.c-cta-inline-btn {
  font-family: var(--ff-mono); font-size: 11px; letter-spacing: .12em;
  text-transform: uppercase; padding: 13px 28px;
  background: var(--primary); color: #000; font-weight: 700;
  border-radius: 4px; white-space: nowrap;
  transition: background .2s; flex-shrink: 0;
}
.c-cta-inline-btn:hover { background: var(--gold-b); }

/* ════════════ ROI CALCULATOR ════════════ */
.c-calc {
  border: 1px solid var(--br-g); border-radius: 12px;
  padding: 36px; margin: 48px 0; background: var(--bg2);
}
.c-calc-title {
  font-family: var(--ff-serif); font-size: 20px; font-weight: 700;
  color: var(--t1); margin-bottom: 6px;
}
.c-calc-sub { font-size: 13px; color: var(--t3); margin-bottom: 28px; }
.c-calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 24px; }
.c-calc-field label {
  display: block; font-family: var(--ff-mono); font-size: 10px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--t3); margin-bottom: 8px;
}
.c-calc-field input {
  width: 100%; background: var(--bg3); border: 1px solid var(--br);
  border-radius: 6px; padding: 12px 16px; color: var(--t1);
  font-family: var(--ff-mono); font-size: 16px;
  transition: border-color .2s;
}
.c-calc-field input:focus {
  outline: none; border-color: var(--primary);
}
.c-calc-btn {
  width: 100%; padding: 14px; background: var(--primary); color: #000;
  font-weight: 700; font-size: 14px; letter-spacing: .06em;
  border: none; border-radius: 6px; cursor: pointer;
  transition: background .2s;
}
.c-calc-btn:hover { background: var(--gold-b); }
.c-calc-result {
  margin-top: 24px; padding: 24px; background: var(--bg3);
  border-radius: 8px; border: 1px solid var(--br-g);
  display: none;
}
.c-calc-result.show { display: block; }
.c-calc-result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.c-calc-item-label {
  font-family: var(--ff-mono); font-size: 9px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--t3); margin-bottom: 6px;
}
.c-calc-item-val {
  font-family: var(--ff-mono); font-size: 24px; font-weight: 500; color: var(--gold-b);
}
.c-calc-note { font-size: 11px; color: var(--t3); margin-top: 16px; line-height: 1.7; }

/* ════════════ METHODOLOGY ════════════ */
.c-method {
  background: rgba(255,255,255,0.018); border: 1px solid var(--br);
  border-radius: 10px; padding: 24px 28px; margin: 48px 0;
}
.c-method-label {
  font-family: var(--ff-mono); font-size: 9px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--t3); margin-bottom: 12px;
}
.c-method-body { font-size: 12px; color: var(--t3); line-height: 2.0; }
.c-method-body strong { color: var(--t2); }

/* ════════════ FAQ ════════════ */
.c-faq { margin-top: 72px; }
.c-faq-title {
  font-family: var(--ff-serif); font-size: 28px; font-weight: 700;
  color: var(--t1); margin-bottom: 32px; letter-spacing: -.02em;
}
.c-faq-item {
  border-bottom: 1px solid var(--br); padding: 24px 0;
}
.c-faq-q {
  font-size: 16px; font-weight: 600; color: var(--t1);
  margin-bottom: 12px; line-height: 1.5;
}
.c-faq-a { font-size: 14px; color: var(--t2); line-height: 1.9; }
.c-faq-a strong { color: var(--gold-b); }

/* ════════════ RELATED COLUMNS ════════════ */
.c-related { margin-top: 80px; padding-top: 48px; border-top: 1px solid var(--br); }
.c-related-label {
  font-family: var(--ff-mono); font-size: 9px; letter-spacing: .22em;
  text-transform: uppercase; color: var(--t3); margin-bottom: 24px;
}
.c-related-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1px; background: var(--br); border-radius: 10px; overflow: hidden;
  border: 1px solid var(--br);
}
.c-related-card {
  background: var(--bg); padding: 28px 32px;
  transition: background .3s, transform .3s var(--ease-out);
  position: relative; overflow: hidden; display: block;
}
.c-related-card:hover { background: var(--bg2); transform: translateY(-3px); }
.c-related-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, var(--primary), transparent);
  transform: scaleX(0); transform-origin: left; transition: transform .4s;
}
.c-related-card:hover::before { transform: scaleX(1); }
.c-related-tag {
  font-family: var(--ff-mono); font-size: 9px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--primary);
  margin-bottom: 10px; display: inline-block;
  border: 1px solid var(--br-g); padding: 3px 10px; border-radius: 100px;
}
.c-related-title {
  font-size: 15px; font-weight: 500; color: var(--t2);
  line-height: 1.6; margin-bottom: 10px;
  transition: color .3s;
}
.c-related-card:hover .c-related-title { color: var(--t1); }
.c-related-arrow {
  position: absolute; right: 28px; bottom: 28px;
  font-family: var(--ff-mono); font-size: 16px; color: var(--primary);
  opacity: 0; transform: translateX(-10px);
  transition: opacity .3s, transform .3s;
}
.c-related-card:hover .c-related-arrow { opacity: 1; transform: translateX(0); }

/* ════════════ BIG CTA SECTION ════════════ */
.c-cta-sec {
  padding: 100px 56px;
  border-top: 1px solid var(--br);
  position: relative; overflow: hidden;
}
.c-cta-sec::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(255,255,255,0.06), transparent);
  pointer-events: none;
}
.c-cta-h {
  font-family: var(--ff-serif);
  font-size: clamp(40px, 7vw, 100px);
  font-weight: 900; line-height: 1.05;
  letter-spacing: -.03em; margin-bottom: 48px;
  overflow: hidden;
}
.c-cta-h span { display: block; transform: translateY(110%); }
.c-cta-h em { font-style: italic; color: var(--primary); }
.c-cta-row {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 24px; border-top: 1px solid var(--br);
  flex-wrap: wrap; gap: 20px;
}
.c-cta-link {
  font-size: 14px; font-weight: 700; padding: 16px 40px;
  background: var(--primary); color: #000;
  border-radius: 4px; display: inline-flex; align-items: center; gap: 8px;
  transition: background .2s, transform .2s;
}
.c-cta-link:hover { background: var(--gold-b); transform: translateY(-2px); }
.c-cta-note { font-family: var(--ff-mono); font-size: 9px; letter-spacing: .1em; color: var(--t3); }

/* ════════════ FOOTER ════════════ */
.c-footer {
  padding: 32px 56px;
  border-top: 1px solid var(--br);
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--ff-mono); font-size: 9px;
  letter-spacing: .14em; text-transform: uppercase; color: var(--t3);
}
.c-footer-logo { font-family: var(--ff-serif); font-size: 16px; color: var(--t1); }
.c-footer-logo span { color: var(--primary); }

/* ════════════ REVEAL ANIMATION ════════════ */
.c-reveal {
  opacity: 1; transform: translateY(0);
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
}
.c-reveal.in { opacity: 1; transform: translateY(0); }
.c-reveal-d1 { transition-delay: .06s; }
.c-reveal-d2 { transition-delay: .12s; }
.c-reveal-d3 { transition-delay: .18s; }
.c-reveal-d4 { transition-delay: .24s; }

/* ════════════ RESPONSIVE ════════════ */
@media (max-width: 1100px) {
  .c-layout { grid-template-columns: 1fr; }
  .c-sidebar { display: none; }
  .c-main { padding: 56px 40px; border-right: none; }
  .c-stats { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .c-hero { padding: 130px 24px 56px; }
  .c-nav { padding: 18px 24px; }
  .c-nav-links { display: none; }
  .c-main { padding: 48px 24px; }
  .c-compare { grid-template-columns: 1fr; }
  .c-related-grid { grid-template-columns: 1fr; }
  .c-stats { grid-template-columns: 1fr; }
  .c-calc-grid { grid-template-columns: 1fr; }
  .c-calc-result-grid { grid-template-columns: 1fr; }
  .c-cta-sec { padding: 72px 24px; }
  .c-footer { flex-direction: column; gap: 12px; padding: 24px; }
  .c-cta-inline { flex-direction: column; }
  .c-pull-quote { margin: 48px 0; padding: 28px 24px; }
}
@media (max-width: 480px) {
  .c-hero-h1 { font-size: 26px; }
  .c-article h2 { font-size: 22px; }
}

/* ════════════ PRINT ════════════ */
@media print {
  #cur, #cur2, #read-progress, .c-nav, .c-sidebar,
  .c-cta-inline, .c-cta-sec, .c-related { display: none !important; }
  body { word-break: keep-all; overflow-wrap: break-word; word-break: keep-all; overflow-wrap: break-word;
  word-break: keep-all;
  overflow-wrap: break-word;
 background: #fff; color: #000; cursor: auto; }
  .c-layout { display: block; }
  .c-main { padding: 0; }
  .c-hero { min-height: auto; padding: 40px 0; }
  .c-hero-bg { display: none; }
  .c-article strong { color: #000; }
  .c-data, .c-phase { border: 1px solid #ddd; background: #f9f9f9; }
  .c-reveal { opacity: 1 !important; transform: none !important; }
}

@media (max-width: 768px) {
  .massive-chart-container { padding: 20px !important; }
  .truth-box { padding: 2rem !important; }
  .insight-highlight { padding: 1.5rem !important; }
  .case-study-card { display: flex !important; flex-direction: column !important; padding: 1.5rem !important; gap: 1.5rem !important;  position: relative !important; overflow: hidden !important; }
  .case-study-card > div { flex-direction: column !important; gap: 1rem !important; }
  .case-study-card > div > div { border-left: none !important; padding-left: 0 !important; }
  
  .c-nav-links { display: none !important; }
  
  .cta-sec { padding: 60px 24px !important; }
  .cta-sec h2 { font-size: clamp(28px, 8vw, 40px) !important; }
  footer { padding: 40px 24px !important; }
  .quote-dropcap { font-size: 3.5rem !important; margin-right: 0.5rem !important; margin-top: 0 !important; }
}

/* Confidential Toast & Card Interaction */
.case-study-card {
  cursor: pointer;
  position: relative;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease, border-color 0.3s ease !important;
}
.case-study-card:hover {
  transform: translateY(-4px) !important;
  box-shadow: 0 12px 30px rgba(255, 255, 255, 0.08) !important;
  border-color: rgba(255, 255, 255, 0.4) !important;
}
.case-study-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0);
  transition: box-shadow 0.3s ease;
  pointer-events: none;
}
.case-study-card:hover::after {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.2);
}

.c-toast {
  position: fixed;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(10, 10, 10, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 16px 24px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 16px;
  z-index: 99999;
  box-shadow: 0 20px 40px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.05);
  transition: bottom 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.5s ease;
  opacity: 0;
  pointer-events: none;
  min-width: max-content;
}
.c-toast.show {
  bottom: 40px;
  opacity: 1;
}
.c-toast-icon {
  width: 24px;
  height: 24px;
  color: #FFFFFF;
  animation: pulse-gold 2s infinite;
}
@keyframes pulse-gold {
  0% { opacity: 1; }
  50% { opacity: 0.5; }
  100% { opacity: 1; }
}
.c-toast-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.c-toast-text strong {
  color: #FFFFFF;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  font-family: 'Noto Serif KR', serif;
}
.c-toast-text span {
  color: #A1A1AA;
  font-size: 0.85rem;
  font-family: 'Pretendard', -apple-system, sans-serif;
}

/* DYNAMIC CASE STUDY MODAL */
.c-modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.85); backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 100000; display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
}
.c-modal-overlay.show { opacity: 1; pointer-events: auto; }
.c-modal-container {
  background: #111; border: 1px solid rgba(255,255,255,0.1); width: 90%; max-width: 900px;
  border-radius: 16px; overflow: hidden; transform: translateY(20px) scale(0.98); 
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 40px 80px rgba(0,0,0,0.8);
}
.c-modal-overlay.show .c-modal-container { transform: translateY(0) scale(1); }
.c-modal-header {
  padding: 24px 32px; border-bottom: 1px solid rgba(255,255,255,0.05);
  display: flex; justify-content: space-between; align-items: flex-start; background: #0a0a0a;
}
.c-modal-badge {
  display: inline-block; background: rgba(239, 68, 68, 0.15); color: #ef4444;
  padding: 4px 12px; border-radius: 20px; font-weight: 700; font-family: 'Bebas Neue', sans-serif;
  letter-spacing: 2px; margin-bottom: 12px; font-size: 1.1rem;
}
.c-modal-title { font-size: 1.5rem; font-weight: 600; color: #F8FAFC; margin: 0; font-family: 'Noto Serif KR', serif;}
.c-modal-close {
  background: none; border: none; color: #666; font-size: 2rem; cursor: pointer; line-height: 1;
  transition: color 0.2s; padding: 0; margin: -10px 0 0 0;
}
.c-modal-close:hover { color: #F8FAFC; }
.c-modal-body { padding: 32px; }
.c-modal-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
@media (max-width: 768px) { .c-modal-grid { grid-template-columns: 1fr; gap: 24px; } .c-modal-body { padding: 20px; } .c-modal-header{ padding: 20px;} }
.c-modal-section h4 { color: #888; font-size: 0.85rem; letter-spacing: 1px; margin-bottom: 16px; border-bottom: 1px solid rgba(255,255,255,0.05); padding-bottom: 8px; }
.c-modal-section ul { list-style: none; padding: 0; margin: 0; }
.c-modal-section li { position: relative; padding-left: 16px; margin-bottom: 12px; color: #ddd; font-size: 0.95rem; line-height: 1.5; }
.c-modal-section li::before { content: ''; position: absolute; left: 0; top: 8px; width: 6px; height: 6px; background: #333; border-radius: 50%; }
.c-modal-section li strong { color: #F8FAFC; }
.c-graph-container {
  background: #0a0a0a; border: 1px solid rgba(255,255,255,0.05); border-radius: 8px;
  height: 200px; position: relative; overflow: hidden; margin-bottom: 16px;
}
.c-graph-container svg { width: 100%; height: 100%; }
.c-graph-area { opacity: 0; transition: opacity 1s ease 0.3s; }
.c-graph-line { stroke-dasharray: 1000; stroke-dashoffset: 1000; transition: stroke-dashoffset 1.5s cubic-bezier(0.16, 1, 0.3, 1) 0.1s; }
.c-modal-overlay.show .c-graph-line { stroke-dashoffset: 0; }
.c-modal-overlay.show .c-graph-area { opacity: 1; }
.c-graph-overlay { position: absolute; top: 16px; left: 16px; }
.c-stat-label { display: block; color: #888; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 1px; }
.c-stat-value { display: block; color: #10B981; font-size: 2.5rem; font-weight: 700; font-family: 'Bebas Neue', sans-serif; line-height: 1; margin-top:4px;}
.c-modal-log { background: rgba(16, 185, 129, 0.05); border-left: 3px solid #10B981; padding: 12px 16px; border-radius: 0 4px 4px 0; }
.c-modal-log strong { display: block; color: #10B981; font-size: 0.8rem; text-transform: uppercase; margin-bottom: 4px; font-weight:700;}
.c-modal-log p { margin: 0; color: #aaa; font-size: 0.85rem; line-height: 1.4; }

/* MAX LEVEL DATA TERMINAL GRID */
.data-grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  max-height: 750px;
  overflow-y: auto;
  padding: 16px 16px 16px 0;
  margin-top: 3rem;
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  position: relative;
}

/* Premium Scrollbar */
.data-grid-container
.data-grid-container
.data-grid-container
.data-grid-container

/* Masking effect for scroll */
.data-grid-wrapper {
  position: relative;
  margin-top: 3rem;
}
.data-grid-wrapper::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 16px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, #000);
  pointer-events: none;
}

/* Override inline grid for mobile-like vertical stacking inside small cards */
.data-grid-container .case-study-card > div[style*="display:grid"],
.data-grid-container .case-study-card > div[style*="display: grid"] {
  display: flex !important;
  flex-direction: column !important;
  gap: 1rem !important;
}

.data-grid-container .case-study-card {
  margin-bottom: 0 !important;
  padding: 1.5rem !important;
  background: linear-gradient(145deg, #0a0a0a, #050505);
}

.data-grid-container .case-study-card h4 {
  font-size: 1.1rem !important;
  line-height: 1.4 !important;
}

.data-grid-container .card-col h4 {
  font-size: 0.85rem !important;
  margin-bottom: 0.5rem !important;
}
.data-grid-container .card-col ul li {
  font-size: 0.85rem !important;
  margin-bottom: 0.4rem !important;
}

/* WORLD CLASS DYNAMIC MODAL UPGRADE */
.wc-modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.85); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  z-index: 100000; display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.wc-modal-overlay.show { opacity: 1; pointer-events: auto; }
.wc-modal-container {
  background: linear-gradient(145deg, #0f0f0f, #050505);
  border: 1px solid rgba(255,255,255,0.08); width: 90%; max-width: 950px;
  border-radius: 20px; overflow: hidden; transform: translateY(40px) scale(0.95); 
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: 0 50px 100px rgba(0,0,0,0.9), inset 0 1px 0 rgba(255,255,255,0.1);
  position: relative;
}
.wc-modal-overlay.show .wc-modal-container { transform: translateY(0) scale(1); }

/* Grain Noise Overlay for realism */
.wc-modal-noise {
  position: absolute; inset: 0; opacity: 0.03; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

.wc-modal-header {
  padding: 30px 40px; border-bottom: 1px solid rgba(255,255,255,0.03);
  display: flex; justify-content: space-between; align-items: flex-start;
  position: relative; z-index: 2; background: rgba(0,0,0,0.2);
}
.wc-modal-badge {
  display: inline-block; background: #E11D48; color: #F8FAFC;
  padding: 4px 12px; border-radius: 4px; font-weight: 700; font-family: 'DM Mono', monospace;
  letter-spacing: 1px; font-size: 0.9rem; text-shadow: 0 1px 2px rgba(0,0,0,0.5);
  
}
.wc-modal-status {
  font-family: 'DM Mono', monospace; color: #10B981; font-size: 0.85rem; letter-spacing: 1px;
}
.pulse-dot { display: inline-block; width: 8px; height: 8px; background: #10B981; border-radius: 50%; box-shadow: 0 0 10px #10B981; animation: wcblink 1.5s infinite; }
@keyframes wcblink { 50% { opacity: 0.3; box-shadow: none; } }

.wc-modal-title { font-size: 1.8rem; font-weight: 700; color: #F8FAFC; margin: 0; font-family: 'Noto Serif KR', serif; letter-spacing: -0.5px;}
.wc-modal-close {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); color: #888;
  width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; cursor: pointer; transition: all 0.3s ease; position: relative; z-index: 2;
}
.wc-modal-close:hover { background: #fff; color: #000; transform: rotate(90deg); }

.wc-modal-body { padding: 40px; position: relative; z-index: 2; }
.wc-modal-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
@media (max-width: 768px) { .wc-modal-grid { grid-template-columns: 1fr; gap: 32px; } .wc-modal-body { padding: 24px; } .wc-modal-header{ padding: 24px;} }

.wc-glitch-text { color: #aaa; font-size: 0.85rem; letter-spacing: 1px; margin-bottom: 20px; font-family: 'DM Mono', monospace; border-bottom: 1px solid rgba(255,255,255,0.05); padding-bottom: 8px; }
.wc-sec-sub { font-size: 0.7rem; color: #555; }

.wc-data-block ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.wc-data-block li { position: relative; padding-left: 20px; color: #d4d4d8; font-size: 1rem; line-height: 1.5; font-family: 'Pretendard', sans-serif; }
.wc-data-block li::before { content: '›'; position: absolute; left: 0; top: 0; color: #555; font-family: monospace; font-weight: bold; }
.wc-data-block li strong { color: #F8FAFC; font-weight: 600; }
#modal-present li::before { color: #10B981; text-shadow: 0 0 5px #10b981; }

.wc-graph-container {
  background: #000; border: 1px solid rgba(255,255,255,0.08); border-radius: 12px;
  height: 220px; position: relative; overflow: hidden; margin-bottom: 20px;
  box-shadow: inset 0 5px 20px rgba(0,0,0,0.5);
}
.wc-graph-container svg { width: 100%; height: 100%; }
.wc-graph-area { opacity: 0; transition: opacity 1.5s ease 0.5s; }
.wc-graph-line { stroke-dasharray: 1000; stroke-dashoffset: 1000; }
.wc-graph-dot { opacity: 0; transition: opacity 0.3s ease 1.5s; }
.wc-modal-overlay.show .wc-graph-dot { opacity: 1; }

.wc-graph-overlay { position: absolute; top: 20px; left: 24px; }
.wc-stat-label { display: block; color: #666; font-size: 0.85rem; font-family: 'DM Mono', monospace; letter-spacing: 1px; }
.wc-stat-value { display: block; color: #10B981; font-size: 3.5rem; font-weight: 700; font-family: 'Bebas Neue', sans-serif; line-height: 1; margin-top:4px; text-shadow: 0 0 20px rgba(16,185,129,0.3);}

.wc-scanner { position: absolute; top: 0; left: 0; width: 100%; height: 2px; background: rgba(16,185,129,0.8); box-shadow: 0 0 10px #10B981; opacity: 0; pointer-events: none; }
.wc-modal-overlay.show .wc-scanner { animation: wcscan 3s ease-in-out infinite; opacity: 0.5; }
@keyframes wcscan { 0% { top: 0%; } 50% { top: 100%; } 100% { top: 0%; } }

.wc-modal-log { background: #050505; border: 1px solid rgba(16, 185, 129, 0.2); padding: 16px 20px; border-radius: 8px; position: relative; overflow: hidden; }
.wc-modal-log::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: #10B981; box-shadow: 0 0 10px #10B981; }
.wc-log-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.wc-log-header strong { display: flex; align-items: center; gap: 8px; color: #10B981; font-size: 0.85rem; font-family: 'DM Mono', monospace; letter-spacing: 0.5px; }
.wc-log-time { color: #666; font-size: 0.8rem; font-family: 'DM Mono', monospace; }
.wc-modal-log p { margin: 0; color: #999; font-size: 0.9rem; line-height: 1.5; font-family: 'Pretendard', sans-serif; }

/* Ultra Premium Grid Hover */
.data-grid-container .case-study-card {
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1) !important;
  border: 1px solid rgba(255,255,255,0.03) !important;
  overflow: visible !important;
}
.data-grid-container .case-study-card:hover {
  transform: translateY(-8px) scale(1.02) !important;
  border-color: #E11D48 !important;
  background: #0f0f0f !important;
  box-shadow: 0 20px 40px rgba(0,0,0,0.9), 0 0 30px rgba(225, 29, 72, 0.15) !important;
  z-index: 10;
}

/* FIX: data-grid-container 내부 c-reveal 즉시 표시 (overflow 컨테이너 내부 observer 오작동 방지) */
.data-grid-container .c-reveal {
  opacity: 1 !important;
  transform: translateY(0) !important;
  transition: none !important;
}


/* =======================================================
   MAX LEVEL UX: CASE STUDY CARDS (APEX TIER)
   ======================================================= */
.case-study-card {
  background: linear-gradient(160deg, #0a0a0a 0%, #000000 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.04) !important;
  border-radius: 20px !important;
  padding: 3.5rem !important;
  margin-bottom: 3rem !important;
  transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1) !important;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.05) !important;
  backdrop-filter: blur(10px);
}

.case-study-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  border-radius: 20px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.4), transparent 60%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.7s ease;
  pointer-events: none;
}

.case-study-card:hover {
  transform: translateY(-8px) scale(1.01) !important;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.9), 0 0 40px rgba(255, 255, 255, 0.08) !important;
  z-index: 10;
}

.case-study-card:hover::after {
  opacity: 1;
}

/* Background Number (001, 002) */
.case-study-card > div:first-child {
  font-size: 14rem !important;
  color: rgba(255, 255, 255, 0.015) !important;
  top: -40px !important;
  right: -10px !important;
  letter-spacing: -8px;
  line-height: 1;
  text-shadow: 0 10px 30px rgba(0,0,0,0.8);
  font-weight: 900;
  transition: color 0.5s ease;
}

.case-study-card:hover > div:first-child {
  color: rgba(255, 255, 255, 0.03) !important;
}

/* Title */
.case-study-card h4 {
  font-family: var(--ff-serif);
  font-size: 1.9rem !important;
  color: #ffffff !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
  padding-bottom: 1.8rem !important;
  margin-bottom: 3rem !important;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
}

.case-study-card h4::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 24px;
  background: #FFFFFF;
  margin-right: 16px;
  border-radius: 4px;
  
}

/* Flex Container for Before/After */
.case-study-card > div:nth-of-type(2) {
  gap: 2rem !important;
}

/* Before (노예) Section */
.case-study-card > div:nth-of-type(2) > div:first-child {
  background: rgba(255, 255, 255, 0.015) !important;
  border-radius: 16px !important;
  padding: 2.5rem !important;
  border: 1px solid rgba(255, 255, 255, 0.03) !important;
  transition: all 0.4s ease;
}

.case-study-card:hover > div:nth-of-type(2) > div:first-child {
  opacity: 0.6; /* Dim the 'before' on hover */
  filter: grayscale(100%);
}

.case-study-card > div:nth-of-type(2) > div:first-child strong:first-child {
  color: #71717A !important;
  font-family: var(--ff-mono);
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 0.85rem !important;
  margin-bottom: 1.5rem !important;
  display: block;
}

.case-study-card > div:nth-of-type(2) > div:first-child ul {
  padding-left: 0 !important;
  list-style: none;
}

.case-study-card > div:nth-of-type(2) > div:first-child ul li {
  color: #A1A1AA !important;
  font-size: 1.05rem;
  margin-bottom: 1.2rem;
  line-height: 1.6;
  padding-left: 1.5rem;
  position: relative;
}

.case-study-card > div:nth-of-type(2) > div:first-child ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: #52525B;
  font-family: var(--ff-mono);
}

/* After (제왕) Section - APEX Tier */
.case-study-card > div:nth-of-type(2) > div:last-child {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.08) 0%, rgba(0, 0, 0, 0) 100%) !important;
  border-radius: 16px !important;
  padding: 2.5rem !important;
  border: 1px solid rgba(255, 255, 255, 0.3) !important;
  border-left: 1px solid rgba(255, 255, 255, 0.3) !important;
  box-shadow: inset 0 0 30px rgba(255, 255, 255, 0.05), 0 10px 30px rgba(0,0,0,0.5) !important;
  position: relative;
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.case-study-card:hover > div:nth-of-type(2) > div:last-child {
  transform: scale(1.02);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.12) 0%, rgba(0, 0, 0, 0) 100%) !important;
  border-color: rgba(255, 255, 255, 0.6) !important;
  box-shadow: inset 0 0 40px rgba(255, 255, 255, 0.1), 0 15px 40px rgba(255, 255, 255, 0.15) !important;
}

.case-study-card > div:nth-of-type(2) > div:last-child strong:first-child {
  color: #D4D4D8 !important;
  font-family: var(--ff-mono);
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 0.85rem !important;
  margin-bottom: 1.5rem !important;
  display: block;
  text-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
}

.case-study-card > div:nth-of-type(2) > div:last-child ul {
  padding-left: 0 !important;
  list-style: none;
}

.case-study-card > div:nth-of-type(2) > div:last-child ul li {
  color: #E4E4E7 !important;
  font-size: 1.15rem;
  margin-bottom: 1.2rem;
  line-height: 1.6;
  font-weight: 500;
  padding-left: 1.5rem;
  position: relative;
}

.case-study-card > div:nth-of-type(2) > div:last-child ul li::before {
  content: '✦';
  position: absolute;
  left: 0;
  color: #FFFFFF;
  font-size: 0.9rem;
}

.case-study-card > div:nth-of-type(2) > div:last-child ul li strong {
  color: #ffffff !important;
  background: rgba(255, 255, 255, 0.2) !important;
  padding: 2px 10px !important;
  border-radius: 6px !important;
  border: 1px solid rgba(255, 255, 255, 0.3);
  font-weight: 700;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

@media (max-width: 768px) {
  .case-study-card > div:nth-of-type(2) {
    flex-direction: column !important;
    gap: 1.5rem !important;
  }
  .case-study-card {
    padding: 2rem !important;
  }
  .case-study-card > div:first-child {
    font-size: 8rem !important;
    top: -10px !important;
    right: 0px !important;
  }
}


/* =======================================================
   APEX TIER: CLICK INTERACTION (RIPPLE & TOAST)
   ======================================================= */
.case-study-card { cursor: pointer; }
.case-study-card:active { transform: scale(0.98) !important; transition: transform 0.1s !important; }

.apex-ripple {
  position: absolute;
  width: 2px; height: 2px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(1);
  animation: ripple-anim 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  pointer-events: none;
  z-index: 100;
}
@keyframes ripple-anim {
  0% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  100% { transform: translate(-50%, -50%) scale(400); opacity: 0; }
}

.apex-toast {
  position: fixed;
  bottom: 40px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(5, 5, 5, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #F8FAFC;
  padding: 16px 32px;
  border-radius: 50px;
  font-family: var(--ff-sans);
  font-size: 15px;
  font-weight: 500;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 15px 40px rgba(0,0,0,0.8), 0 0 30px rgba(255, 255, 255, 0.15);
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 10px;
}
.apex-toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.apex-toast-icon {
  display: inline-block;
  width: 8px; height: 8px;
  background: #FFFFFF;
  border-radius: 50%;
  box-shadow: 0 0 10px #FFFFFF;
  animation: pulse-dot 1.5s infinite;
}
@keyframes pulse-dot {
  0% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7); }
  70% { box-shadow: 0 0 0 6px rgba(255, 255, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); }
}

/* =======================================================
   APEX TIER: DATA ANALYTICS HEADER & SPARKLINES
   ======================================================= */
.apex-data-header {
  display: flex;
  gap: 2rem;
  background: rgba(10, 10, 10, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  padding: 2rem 3rem;
  margin-bottom: 4rem;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}
.apex-data-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 100%;
  background: #FFFFFF;
  box-shadow: 0 0 15px #FFFFFF;
}
.data-stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-right: 1px solid rgba(255, 255, 255, 0.05);
}
.data-stat:last-child { border-right: none; }
.data-label {
  font-family: var(--ff-mono);
  font-size: 0.8rem;
  color: #71717A;
  letter-spacing: 2px;
}
.data-value {
  font-family: var(--ff-serif);
  font-size: 2.5rem;
  color: #F8FAFC;
  font-weight: 900;
  text-shadow: 0 5px 15px rgba(0,0,0,0.5);
}

.apex-sparkline {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 40px;
  margin-top: 1rem;
  opacity: 0.5;
  transition: all 0.5s ease;
}
.case-study-card:hover .apex-sparkline {
  opacity: 1;
}
.spark-bar {
  flex: 1;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px 2px 0 0;
  transition: height 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  height: 10%;
}
.case-study-card:hover .spark-bar:nth-child(1) { height: 15%; }
.case-study-card:hover .spark-bar:nth-child(2) { height: 20%; }
.case-study-card:hover .spark-bar:nth-child(3) { height: 25%; }
.case-study-card:hover .spark-bar:nth-child(4) { height: 40%; }
.case-study-card:hover .spark-bar:nth-child(5) { 
  height: 100%; 
  background: #FFFFFF; 
   
}

.apex-verified-badge {
  position: absolute;
  top: 2rem; right: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #FFFFFF;
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  padding: 4px 10px;
  border-radius: 20px;
  letter-spacing: 1px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  gap: 6px;
  opacity: 0.6;
  z-index: 5;
}
.apex-verified-badge::before {
  content: '';
  display: block;
  width: 6px; height: 6px;
  background: #FFFFFF;
  border-radius: 50%;
  animation: pulse-dot 1.5s infinite;
}

@media (max-width: 768px) {
  .apex-data-header { flex-direction: column; gap: 1.5rem; padding: 2rem; }
  .data-stat { border-right: none; border-bottom: 1px solid rgba(255, 255, 255, 0.05); padding-bottom: 1rem; }
  .data-stat:last-child { border-bottom: none; padding-bottom: 0; }
}


/* =========================================================
   [APEX-TIER] MAX LEVEL SENSORY DESIGN SYSTEM
   ========================================================= */
/* Typography Perfection */
body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  letter-spacing: -0.02em;
}

/* Cinematic Scroll Reveal */
.reveal-max {
  opacity: 0;
  transform: translateY(40px) scale(0.98);
  transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}
.reveal-max.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Glassmorphism 2.0 & Aurora Backgrounds */
.aurora-wrapper {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  z-index: -1;
  overflow: hidden;
  background: #09090B;
  pointer-events: none;
}
.aurora-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.4;
  animation: floatOrb 20s infinite ease-in-out alternate;
}
.aurora-orb.teal {
  width: 50vw; height: 50vw;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.15) 0%, transparent 70%);
  top: -10%; left: -10%;
}
.aurora-orb.cyan {
  width: 40vw; height: 40vw;
  background: radial-gradient(circle, rgba(8, 145, 178, 0.15) 0%, transparent 70%);
  bottom: -20%; right: -10%;
  animation-delay: -5s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(10%, 15%) scale(1.2); }
}

/* 3D Tilt Card Overrides */
.case-study-card {
  transform-style: preserve-3d;
  transform: perspective(1000px);
  transition: border-color 0.4s ease, box-shadow 0.4s ease;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(24, 24, 27, 0.7) !important;
}
.case-study-card:hover {
  border-color: rgba(20, 184, 166, 0.5) !important;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5), 0 0 30px rgba(20, 184, 166, 0.1) !important;
}


/* =========================================================
   [WORLD-CLASS] SUPER QUALITY SENSORY OVERHAUL 
   ========================================================= */
/* 1. Linear.app Style Grid Matrix */
.world-class-grid {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  z-index: -2;
  background-size: 40px 40px;
  background-image: linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  mask-image: linear-gradient(to bottom, black 40%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 40%, transparent 100%);
  pointer-events: none;
}

/* 2. Animated Gradient Shimmer Text */
.gradient-text-shimmer {
  background: linear-gradient(to right, #5EEAD4 20%, #F8FAFC 40%, #5EEAD4 60%, #F8FAFC 80%);
  background-size: 200% auto;
  color: #000;
  background-clip: text;
  text-fill-color: transparent;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shine 4s linear infinite;
}
@keyframes shine {
  to { background-position: 200% center; }
}

/* 3. Vercel/Linear Style Radial Hover Spotlight */
.case-study-card {
  position: relative;
  overflow: hidden;
  background: rgba(24, 24, 27, 0.4) !important;
  border: 1px solid rgba(255, 255, 255, 0.05) !important;
}
.case-study-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(800px circle at var(--mouse-x) var(--mouse-y), rgba(20, 184, 166, 0.06), transparent 40%);
  z-index: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
  opacity: 0;
}
.case-study-card:hover::before {
  opacity: 1;
}

/* 4. Deep Layering & Haptic Press */
.case-study-card:active {
  transform: perspective(1000px) scale3d(0.98, 0.98, 0.98) !important;
  transition: transform 0.1s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* 5. Glow Borders for Badges */
.apex-verified-badge {
  position: relative;
  overflow: hidden;
}
.apex-verified-badge::after {
  content: '';
  position: absolute;
  top: 0; left: -100%; width: 50%; height: 100%;
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.3), transparent);
  transform: skewX(-20deg);
  animation: badgeSweep 3s infinite;
}
@keyframes badgeSweep {
  0% { left: -100%; }
  20% { left: 200%; }
  100% { left: 200%; }
}


/* =========================================================
   [DOMINANCE] OVERWHELMING AGENCY CRUSHER STYLES
   ========================================================= */

/* 1. Cinematic Film Grain (Awwwards Top-Tier Aesthetic) */
.film-grain {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* 2. AI Engine Terminal Boot Sequence */
.apex-terminal {
  background: #09090b;
  border: 1px solid rgba(20, 184, 166, 0.2);
  border-radius: 8px;
  padding: 1.5rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.85rem;
  color: #5EEAD4;
  margin-bottom: 4rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 30px rgba(20, 184, 166, 0.05) inset;
}
.apex-terminal::before {
  content: "APEX NEURAL PIPELINE v4.2";
  position: absolute;
  top: -1px; left: -1px;
  background: rgba(20, 184, 166, 0.1);
  border-right: 1px solid rgba(20, 184, 166, 0.3);
  border-bottom: 1px solid rgba(20, 184, 166, 0.3);
  padding: 4px 12px;
  font-size: 0.7rem;
  color: #14B8A6;
  font-weight: bold;
}
.terminal-line {
  opacity: 0;
  transform: translateX(-10px);
}
.terminal-line.active {
  animation: typeLine 0.1s forwards;
}
@keyframes typeLine {
  to { opacity: 1; transform: translateX(0); }
}
.terminal-cursor {
  display: inline-block;
  width: 8px; height: 15px;
  background: #5EEAD4;
  animation: blink 1s step-end infinite;
  vertical-align: middle;
}
@keyframes blink { 50% { opacity: 0; } }

/* 3. Magnetic Hover Physics Wrapper */
.magnetic-wrap {
  display: inline-block;
  position: relative;
}


/* [APEX-TIER] Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--bg3);
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}


::selection {
  background: var(--primary-light);
  color: #000;
}


/* =========================================================
   [APEX-TIER] BULLETPROOF RESPONSIVE SYSTEM
   ========================================================= */
.apex-masterpiece-grid {
  display: flex;
  flex-direction: column;
  gap: clamp(2rem, 5vw, 4rem);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.apex-card {
  background: rgba(24, 24, 27, 0.6) !important;
  border: 1px solid rgba(255, 255, 255, 0.05) !important;
  border-radius: 16px;
  padding: clamp(1.5rem, 5vw, 3rem);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  width: 100%;
  box-sizing: border-box;
  transform-style: preserve-3d;
  transition: border-color 0.4s ease, box-shadow 0.4s ease;
}

.apex-card:hover {
  border-color: rgba(20, 184, 166, 0.5) !important;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5), 0 0 30px rgba(20, 184, 166, 0.1) !important;
}

.apex-card:active {
  transform: perspective(1000px) scale3d(0.98, 0.98, 0.98) !important;
  transition: transform 0.1s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* Vercel Style Spotlight Layer */
.apex-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(800px circle at var(--mouse-x, 0) var(--mouse-y, 0), rgba(20, 184, 166, 0.06), transparent 40%);
  z-index: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
  opacity: 0;
}
.apex-card:hover::before { opacity: 1; }

.apex-card-content {
  position: relative;
  z-index: 2;
}

/* Responsive Split Layout */
.apex-card-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.apex-past-box, .apex-present-box {
  width: 100%;
  box-sizing: border-box;
}

/* Desktop Only Adjustments */
@media (min-width: 768px) {
  .apex-card-split {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
  .apex-present-box {
    border-left: 1px solid rgba(20, 184, 166, 0.2);
    padding-left: 3rem;
  }
}

.apex-insight-box {
  background: rgba(8, 145, 178, 0.05);
  border-left: 4px solid #0891B2;
  padding: clamp(1.2rem, 3vw, 1.5rem);
  border-radius: 0 8px 8px 0;
  width: 100%;
  box-sizing: border-box;
}

.apex-insight-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  color: #D4D4D8;
  line-height: 1.7;
  font-size: 0.95rem;
}

.apex-ul {
  color: #A1A1AA;
  line-height: 1.7;
  padding-left: 1.5rem;
  margin: 0;
  list-style-type: square;
  display: flex;
  flex-direction: column;
  gap: 12px;
}


/* [APEX-TIER] CLEAN CSS HOVER STATES (Replacing 1990s Inline JS) */
.apex-sidebar-link {
  color: #A1A1AA !important;
  text-decoration: none;
  transition: color 0.3s ease, transform 0.3s ease;
  display: inline-block;
}
.apex-sidebar-link:hover {
  color: #F8FAFC !important;
  transform: translateX(4px);
}
.apex-nav-link {
  color: #14B8A6 !important;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
}
.apex-nav-link:hover {
  transform: translateX(8px) !important;
}