:root {
  --bg: #fbf7ee;
  --surface: #ffffff;
  --ink: #101514;
  --muted: #5f6f68;
  --line: #e7ded2;
  --green: #1ec987;
  --green-dark: #087153;
  --blue: #2451ff;
  --blue-soft: #e6ebff;
  --coral: #ff735c;
  --shadow: 0 24px 70px rgba(16, 21, 20, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Pretendard", "Apple SD Gothic Neo", "Noto Sans KR", system-ui, sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.disclosure-bar {
  margin: 0;
  padding: 10px clamp(16px, 5vw, 72px);
  background: var(--ink);
  color: white;
  font-size: 14px;
  font-weight: 850;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
  padding: 14px clamp(18px, 5vw, 72px);
  border-bottom: 1px solid rgba(231, 222, 210, 0.86);
  background: rgba(251, 247, 238, 0.92);
  backdrop-filter: blur(16px);
}

.brand,
.nav-links,
.hero-actions,
.hero-metrics {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 950;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 10px;
  background: var(--ink);
  color: white;
}

.nav-links {
  gap: 20px;
  color: #3f4f48;
  font-size: 15px;
  font-weight: 850;
}

.header-cta {
  border-radius: 999px;
  padding: 10px 16px;
  background: var(--ink);
  color: white;
  font-weight: 950;
  box-shadow: 0 12px 28px rgba(16, 21, 20, 0.18);
}

.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: calc(100svh - 110px);
  padding: clamp(54px, 8vw, 94px) clamp(20px, 6vw, 88px) 50px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(8, 15, 44, 0.92) 0%, rgba(8, 15, 44, 0.78) 42%, rgba(8, 15, 44, 0.12) 100%),
    url("assets/kim-woobin-hero.png") center right / contain no-repeat,
    linear-gradient(120deg, #2451ff 0%, #112a86 52%, #061332 100%);
  color: white;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 950;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #b8ffd9;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
  word-break: keep-all;
}

h1 {
  margin: 0;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.15;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
}

.hero-subtitle,
.section-heading p,
.feature-card p,
.plan-copy,
.steps p,
.recommend-grid p,
.notice-grid p,
details p,
.footer p {
  color: var(--muted);
}

.hero-subtitle {
  max-width: 690px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 19px;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  border-radius: 999px;
  padding: 0 22px;
  font-weight: 950;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  background: var(--ink);
  color: white;
  box-shadow: 0 16px 32px rgba(16, 21, 20, 0.2);
}

.hero .button.primary {
  background: white;
  color: var(--ink);
}

.button.secondary {
  border: 1px solid rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

.hero-metrics {
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.hero-metrics div {
  min-width: 164px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
}

.hero-metrics strong,
.hero-metrics span {
  display: block;
}

.hero-metrics strong {
  font-size: 20px;
  line-height: 1.1;
}

.hero-metrics span {
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 14px;
  font-weight: 800;
}

.section {
  padding: 92px clamp(20px, 6vw, 88px);
}

.section-heading {
  max-width: 880px;
  margin-bottom: 36px;
}

.section-heading p:not(.eyebrow) {
  margin: 14px 0 0;
  font-size: 18px;
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.plan-card {
  position: relative;
  display: flex;
  min-height: 620px;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(24px, 4vw, 36px);
  background: white;
}

.plan-card.featured {
  border-color: rgba(36, 81, 255, 0.24);
  background: linear-gradient(145deg, #ffffff 0%, #eef2ff 100%);
  box-shadow: var(--shadow);
}

.badge {
  position: absolute;
  top: 18px;
  right: 18px;
  border-radius: 999px;
  padding: 7px 12px;
  background: var(--blue);
  color: white;
  font-size: 13px;
  font-weight: 950;
}

.plan-label {
  margin: 0 0 10px;
  color: var(--muted);
  font-weight: 950;
}

.plan-discount {
  margin: 18px 0 10px;
  color: var(--blue);
  font-size: clamp(34px, 5vw, 54px);
  font-weight: 950;
  line-height: 1.05;
}

.price-box {
  display: grid;
  gap: 8px;
  margin: 20px 0;
}

.price-box div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  background: #fafafa;
}

.price-box span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 850;
}

.price-box strong {
  color: var(--ink);
  font-size: 20px;
  line-height: 1.1;
}

.price-box .estimate {
  grid-template-columns: minmax(0, 1fr) auto;
  background: #eff3ff;
  border-color: rgba(36, 81, 255, 0.18);
}

.price-box small {
  grid-column: 1 / -1;
  color: var(--muted);
  font-weight: 900;
}

.price-box .estimate small {
  color: var(--blue);
}

.source-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 750;
}

.plan-list {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.plan-list li {
  position: relative;
  padding-left: 24px;
  color: #27312d;
  font-weight: 800;
}

.plan-list li::before {
  position: absolute;
  left: 0;
  color: var(--blue);
  content: "✓";
}

.comparison-table {
  margin-top: 22px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.table-header,
.table-row {
  display: grid;
  grid-template-columns: minmax(180px, 1.3fr) minmax(92px, 0.45fr) minmax(110px, 0.5fr);
  align-items: center;
  gap: 12px;
  padding: 17px 22px;
  border-bottom: 1px solid var(--line);
}

.table-header {
  background: #f3f5ff;
  color: #1c2d82;
  font-size: 14px;
  font-weight: 950;
  text-transform: uppercase;
}

.table-row:last-child {
  border-bottom: 0;
}

.table-row span:first-child {
  color: #202925;
  font-weight: 850;
}

.check {
  color: var(--blue);
  font-weight: 950;
}

.dash {
  color: #a3aaa6;
  font-weight: 950;
}

.feature-grid,
.recommend-grid,
.notice-grid,
.learning-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.feature-card,
.recommend-grid article,
.notice-grid article,
.learning-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  background: white;
}

.learning-system-section {
  background: #f4f7ff;
}

.learning-grid article span {
  display: inline-flex;
  border-radius: 999px;
  padding: 6px 10px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 12px;
  font-weight: 950;
}

.learning-grid h3 {
  margin-top: 18px;
}

.learning-grid p {
  margin: 12px 0 0;
  color: var(--muted);
}

.feature-icon {
  display: inline-grid;
  min-width: 42px;
  height: 34px;
  place-items: center;
  border-radius: 999px;
  padding: 0 10px;
  background: #e6fff5;
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 950;
}

.feature-card h3 {
  margin-top: 18px;
}

.feature-card p,
.recommend-grid p,
.notice-grid p {
  margin: 12px 0 0;
}

.proof-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 0 clamp(20px, 6vw, 88px);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.proof-band div {
  padding: 28px;
  background: var(--ink);
  color: white;
}

.proof-band span,
.proof-band strong {
  display: block;
}

.proof-band span {
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
  font-weight: 850;
}

.proof-band strong {
  margin-top: 8px;
  font-size: clamp(25px, 3vw, 36px);
  line-height: 1.1;
}

.process {
  background: #f1f8f4;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  min-height: 230px;
  border: 1px solid rgba(8, 113, 83, 0.14);
  border-radius: 8px;
  padding: 24px;
  background: white;
}

.steps span {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 50%;
  background: var(--green);
  color: white;
  font-weight: 950;
}

.steps h3 {
  margin-top: 18px;
}

.recommendation-section {
  background: #fffdf8;
}

.recommend-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.notice-section {
  background: #f7efe1;
}

.notice-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.faq {
  background: white;
}

details {
  border-top: 1px solid var(--line);
  padding: 22px 0;
}

details:last-child {
  border-bottom: 1px solid var(--line);
}

summary {
  cursor: pointer;
  font-size: 19px;
  font-weight: 950;
}

details p {
  max-width: 880px;
  margin: 12px 0 0;
}

.footer {
  padding: 34px clamp(20px, 6vw, 88px) 48px;
  border-top: 1px solid var(--line);
}

.footer p {
  max-width: 1080px;
  margin: 0;
  font-size: 14px;
}

.footer a {
  color: var(--green-dark);
  font-weight: 950;
}

@media (max-width: 1080px) {
  .feature-grid,
  .notice-grid,
  .learning-grid,
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: 54px;
    background-position: center center, center right, center right;
  }

  .plans-grid,
  .proof-band,
  .recommend-grid {
    grid-template-columns: 1fr;
  }

}

@media (max-width: 640px) {
  .disclosure-bar {
    font-size: 12px;
  }

  .site-header {
    min-height: 64px;
    padding: 12px 16px;
  }

  .brand span:last-child {
    display: none;
  }

  .header-cta {
    padding: 9px 13px;
    font-size: 14px;
  }

  .hero {
    padding: 42px 16px 40px;
  }

  h1 {
    font-size: 34px;
  }

  .hero-subtitle {
    font-size: 17px;
  }

  .button {
    width: 100%;
  }

  .hero-metrics,
  .hero-metrics div {
    width: 100%;
  }

  .section {
    padding: 68px 16px;
  }

  .feature-grid,
  .steps,
  .notice-grid,
  .learning-grid {
    grid-template-columns: 1fr;
  }

  .plan-card,
  .feature-card,
  .steps li,
  .recommend-grid article,
  .notice-grid article,
  .learning-grid article {
    min-height: 0;
    padding: 22px;
  }

  .price-box div,
  .price-box .estimate {
    grid-template-columns: 1fr;
  }

  .table-header,
  .table-row {
    grid-template-columns: minmax(140px, 1fr) 70px 82px;
    gap: 8px;
    padding: 14px 12px;
    font-size: 13px;
  }

  .proof-band {
    margin-left: 16px;
    margin-right: 16px;
  }

}