:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --text: #18212f;
  --muted: #657080;
  --line: #e6eaf0;
  --primary: #2c63f2;
  --primary-dark: #1845b8;
  --dark: #101827;
  --dark-soft: #182235;
  --shadow: 0 18px 50px rgba(20, 32, 54, 0.08);
  --max: 1220px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  word-break: keep-all;
}

a { color: inherit; text-decoration: none; }
.container { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; }
.section { padding: 88px 0; }
.section-soft { background: var(--bg-soft); }
.section-dark { background: var(--dark); color: #fff; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand { display: inline-flex; align-items: baseline; gap: 10px; font-weight: 800; }
.brand-ko { font-size: 27px; letter-spacing: -.04em; }
.brand-en { font-size: 13px; color: var(--muted); letter-spacing: .04em; }

.header-cta {
  padding: 12px 20px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}

.eyebrow, .section-kicker {
  margin: 0 0 16px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.hero {
  padding-top: 112px;
  padding-bottom: 112px;
  background:
    radial-gradient(circle at 85% 20%, rgba(44,99,242,.11), transparent 30%),
    linear-gradient(180deg,#fff 0%,#fbfcff 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: 76px;
  align-items: center;
}

.hero-copy { max-width: 690px; }

.hero h1 {
  margin: 0;
  font-size: clamp(52px,5vw,72px);
  line-height: 1.12;
  letter-spacing: -.055em;
  font-weight: 800;
}

.hero h1 strong { color: var(--primary); }

.hero-flow {
  margin: 32px 0 0;
  padding: 16px 20px;
  display: inline-block;
  border-radius: 14px;
  background: #f1f5ff;
  color: #2d4d99;
  font-weight: 700;
  font-size: 16px;
}

.hero-support {
  margin: 20px 0 0;
  font-size: 19px;
  color: var(--muted);
}

.hero-actions { margin-top: 34px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 58px;
  padding: 0 28px;
  border-radius: 15px;
  font-weight: 800;
  transition: .2s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 12px 30px rgba(44,99,242,.22); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-block { width: 100%; }
.btn-large { min-height: 64px; padding: 0 34px; font-size: 18px; }

.microcopy { margin: 10px 0 0; color: var(--muted); font-size: 13px; }

.hero-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 30px;
  padding: 40px;
  box-shadow: 0 22px 60px rgba(20,32,54,.11);
}

.hero-card-step {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 18px;
  align-items: start;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.hero-card-step:first-child { padding-top: 0; }
.hero-card-step:last-child { padding-bottom: 0; border-bottom: 0; }

.step-number {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  border-radius: 15px;
  background: #edf2ff;
  color: var(--primary);
  font-size: 14px;
  font-weight: 900;
}

.hero-card-step strong { display: block; font-size: 20px; line-height: 1.4; }
.hero-card-step p { margin: 8px 0 0; color: var(--muted); font-size: 15px; }

.problem-diagnosis-grid {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: 64px;
  align-items: center;
}

.problem-side h2,
.section-heading h2,
.final-cta h2 {
  margin: 0;
  font-size: clamp(36px,4vw,50px);
  line-height: 1.22;
  letter-spacing: -.045em;
}

.compact-lead {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 18px;
  max-width: 720px;
}

.problem-list {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 12px;
}

.problem-list > div {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: start;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.problem-list > div:last-child { grid-column: 1 / -1; }

.problem-list span {
  color: var(--primary);
  font-weight: 900;
  font-size: 12px;
}

.problem-list p { margin: 0; font-weight: 700; font-size: 15px; }

.diagnosis-panel {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  box-shadow: var(--shadow);
}

.diagnosis-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.diagnosis-panel-head span { color: var(--muted); font-size: 14px; font-weight: 700; }
.diagnosis-panel-head strong { color: var(--primary); font-size: 32px; }

.diagnosis-panel h3 {
  margin: 22px 0 0;
  font-size: 25px;
  letter-spacing: -.03em;
}

.diagnosis-intro { margin: 10px 0 0; color: var(--muted); font-size: 15px; }

.diagnosis-panel-body { margin: 20px 0; }

.result-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.result-row:last-child { border-bottom: 0; }
.result-row span { color: var(--muted); }

.panel-note { margin: 10px 0 0; text-align: center; color: var(--muted); font-size: 12px; }

.section-heading { max-width: 840px; margin-bottom: 42px; }
.section-heading-light .section-kicker { color: #8cabff; }
.section-heading-light h2 { color: #fff; }

.usp-heading { margin-bottom: 34px; }

.usp-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 20px;
}

.usp-card {
  padding: 30px;
  border-radius: 22px;
  background: var(--dark-soft);
  border: 1px solid rgba(255,255,255,.08);
}

.usp-label {
  display: inline-block;
  margin-bottom: 18px;
  color: #8cabff;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .12em;
}

.usp-card h3 { margin: 0; font-size: 23px; letter-spacing: -.03em; }
.usp-card p { margin: 14px 0 0; color: #b9c3d4; }

.usp-core {
  margin: 24px 0 0;
  padding: 20px 24px;
  border-radius: 16px;
  background: #fff;
  color: var(--text);
  font-size: 18px;
}

.compact-change-section { padding-top: 84px; padding-bottom: 84px; }
.compact-heading { margin-bottom: 36px; }
.compact-heading > p:last-child { margin: 18px 0 0; color: var(--muted); font-size: 17px; }

.change-flow-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 36px;
  align-items: stretch;
}

.change-cards {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 14px;
}

.change-cards article {
  padding: 22px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #fff;
}

.change-cards strong { display: block; font-size: 18px; }
.change-cards p { margin: 8px 0 0; color: var(--muted); font-size: 14px; }

.learning-flow-box {
  padding: 28px;
  border-radius: 22px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
}

.learning-flow-box h3 {
  margin: 0;
  font-size: 28px;
  letter-spacing: -.03em;
}

.flow-steps {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.flow-steps span {
  padding: 10px 14px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  font-weight: 800;
  font-size: 14px;
}

.flow-steps i {
  color: var(--primary);
  font-style: normal;
  font-weight: 900;
}

.flow-note { margin: 22px 0 0; color: var(--muted); }

.evidence-note {
  margin-top: 20px;
  padding: 14px 18px;
  border-radius: 14px;
  background: #f8f9fb;
  color: var(--muted);
  font-size: 13px;
}

.final-cta {
  background: linear-gradient(135deg,rgba(44,99,242,.08),rgba(44,99,242,.02));
}

.compact-final-cta {
  padding-top: 96px;
  padding-bottom: 96px;
}

.final-cta-inner { max-width: 880px; text-align: center; }
.final-cta p:not(.section-kicker) { margin: 20px auto 30px; color: var(--muted); font-size: 18px; }

.site-footer {
  padding: 30px 0;
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.footer-inner strong { display: block; }
.footer-inner p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.copyright { text-align: right; }

@media (max-width: 980px) {
  .container { width: min(calc(100% - 32px), var(--max)); }
  .section { padding: 70px 0; }

  .hero-grid,
  .problem-diagnosis-grid,
  .change-flow-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid,
  .problem-diagnosis-grid { gap: 38px; }

  .usp-grid { grid-template-columns: 1fr; }
  .change-flow-grid { gap: 24px; }
}

@media (max-width: 640px) {
  .site-header { position: static; }
  .header-inner { min-height: 64px; }
  .brand-en { display: none; }
  .brand-ko { font-size: 23px; }
  .header-cta { padding: 9px 14px; font-size: 13px; }

  .hero { padding-top: 68px; padding-bottom: 68px; }
  .hero h1 { font-size: 38px; }
  .hero-support, .compact-lead, .final-cta p:not(.section-kicker) { font-size: 16px; }
  .hero-card, .diagnosis-panel { padding: 24px; }

  .problem-side h2,
  .section-heading h2,
  .final-cta h2 { font-size: 32px; }

  .problem-list,
  .change-cards {
    grid-template-columns: 1fr;
  }

  .problem-list > div:last-child { grid-column: auto; }

  .flow-steps {
    align-items: flex-start;
  }

  .flow-steps i {
    width: 100%;
    text-align: center;
    transform: rotate(90deg);
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .copyright { text-align: left; }
}

/* ===== LP-010-4C-1 CHANGE + LEARNING FLOW REFINEMENT ===== */

@media (min-width: 981px) {

  .compact-change-section {
    background: linear-gradient(
      180deg,
      #ffffff 0%,
      #fbfcff 100%
    );
  }

  .compact-heading {
    max-width: 900px;
    margin-bottom: 42px;
  }

  .compact-heading h2 {
    font-size: 52px;
    line-height: 1.18;
  }

  .change-flow-grid {
    grid-template-columns: 1.08fr 0.92fr;
    gap: 42px;
  }

  .change-cards {
    gap: 16px;
  }

  .change-cards article {
    padding: 26px;
    border-radius: 20px;
    box-shadow: 0 10px 26px rgba(20, 32, 54, 0.04);
  }

  .change-cards strong {
    font-size: 20px;
    line-height: 1.45;
  }

  .change-cards p {
    margin-top: 10px;
    font-size: 15px;
    line-height: 1.65;
  }

  .learning-flow-box {
    padding: 32px;
    border-radius: 24px;
    background: #f4f7ff;
    border: 1px solid #dfe7ff;
    box-shadow: 0 14px 34px rgba(44, 99, 242, 0.08);
  }

  .learning-flow-box h3 {
    font-size: 30px;
    line-height: 1.3;
  }

  .flow-steps {
    margin-top: 26px;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    align-items: center;
  }

  .flow-steps span {
    min-height: 74px;
    padding: 14px 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border-radius: 16px;
    background: #ffffff;
    border: 1px solid #dfe5f2;
    font-size: 14px;
    font-weight: 800;
    line-height: 1.4;
  }

  .flow-steps i {
    display: none;
  }

  .flow-note {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid #d9e2f6;
    font-size: 15px;
    line-height: 1.7;
  }

  .evidence-note {
    margin-top: 24px;
    font-size: 14px;
  }
}