:root {
  --ink: #141820;
  --ink-soft: #3a4150;
  --paper: #f7f4ef;
  --paper-2: #efeae2;
  --line: rgba(20, 24, 32, 0.12);
  --blue: #1f4f9c;
  --blue-deep: #163a74;
  --orange: #e85a1b;
  --orange-hot: #ff6a28;
  --white: #ffffff;
  --header-h: 4.25rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Bebas Neue", "Outfit", sans-serif;
  --font-body: "Pretendard Variable", Pretendard, "Outfit", "Apple SD Gothic Neo", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(247, 244, 239, 0.92), rgba(239, 234, 226, 0.96)),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 47px,
      rgba(20, 24, 32, 0.035) 47px,
      rgba(20, 24, 32, 0.035) 48px
    ),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 47px,
      rgba(20, 24, 32, 0.035) 47px,
      rgba(20, 24, 32, 0.035) 48px
    );
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  letter-spacing: -0.01em;
  overflow-x: hidden;
}

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

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

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 800;
}

p {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
  background: rgba(247, 244, 239, 0.78);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(247, 244, 239, 0.92);
}

.logo {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
}

.logo-mark {
  font-family: var(--font-display);
  font-size: 1.85rem;
  letter-spacing: 0.04em;
  line-height: 1;
}

.logo-mark span,
.formula-result span {
  color: var(--orange);
}

.logo-sub {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.16em;
  color: var(--blue);
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2rem);
  font-size: 0.92rem;
  font-weight: 600;
}

.nav a:not(.nav-cta) {
  opacity: 0.72;
  transition: opacity 0.2s ease;
}

.nav a:not(.nav-cta):hover {
  opacity: 1;
}

.nav-cta {
  padding: 0.55rem 1rem;
  background: var(--ink);
  color: var(--white);
  transition: background 0.2s ease, transform 0.2s ease;
}

.nav-cta:hover {
  background: var(--orange);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 1.4rem;
  height: 2px;
  margin: 0.35rem auto;
  background: var(--ink);
  transition: transform 0.25s var(--ease);
}

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  padding:
    calc(var(--header-h) + 2rem)
    clamp(1.25rem, 4vw, 3rem)
    clamp(2.5rem, 6vw, 4.5rem);
  color: var(--white);
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  transform: scale(1.04);
  animation: hero-drift 18s ease-in-out infinite alternate;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10, 12, 18, 0.92) 0%, rgba(10, 12, 18, 0.62) 38%, rgba(10, 12, 18, 0.28) 68%, rgba(10, 12, 18, 0.35) 100%),
    linear-gradient(180deg, rgba(10, 12, 18, 0.35) 0%, rgba(10, 12, 18, 0.2) 40%, rgba(10, 12, 18, 0.62) 100%);
}

.hero-pulse {
  position: absolute;
  right: 8%;
  top: 28%;
  width: min(42vw, 420px);
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid rgba(232, 90, 27, 0.45);
  box-shadow:
    0 0 0 28px rgba(232, 90, 27, 0.08),
    0 0 0 56px rgba(232, 90, 27, 0.04);
  animation: pulse-ring 4.5s var(--ease) infinite;
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 38rem;
  animation: rise-in 1s var(--ease) both;
}

.brand-lockup {
  margin-bottom: 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 5.4rem);
  letter-spacing: 0.05em;
  line-height: 0.9;
  color: var(--white);
}

.hero h1 {
  font-size: clamp(1.85rem, 4.4vw, 3rem);
  font-weight: 800;
  max-width: 14ch;
}

.hero-lead {
  margin-top: 1.1rem;
  max-width: 28ch;
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.35rem;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 0.2s var(--ease), background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

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

.btn-primary {
  background: var(--orange);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--orange-hot);
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.45);
  color: var(--white);
}

.btn-ghost:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.section {
  padding: clamp(4.5rem, 10vw, 7.5rem) clamp(1.25rem, 4vw, 3rem);
}

.section-inner {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.eyebrow {
  margin-bottom: 0.85rem;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.18em;
  color: var(--blue);
}

.section h2 {
  font-size: clamp(1.85rem, 4vw, 2.85rem);
  max-width: 16ch;
}

.section-lead {
  margin-top: 1rem;
  max-width: 38rem;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.concept {
  background:
    radial-gradient(circle at 85% 15%, rgba(31, 79, 156, 0.08), transparent 35%),
    transparent;
}

.concept-formula {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem 1rem;
  margin-top: 2.75rem;
}

.formula-item {
  display: grid;
  gap: 0.55rem;
  justify-items: center;
  min-width: 6.5rem;
  padding: 1rem 0.75rem;
  border: 1.5px solid var(--blue);
  background: rgba(255, 255, 255, 0.55);
  font-size: 0.88rem;
  font-weight: 700;
}

.formula-icon {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--blue);
}

.formula-icon svg {
  width: 100%;
  height: 100%;
}

.formula-op {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--orange);
  line-height: 1;
}

.formula-result {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 4.2rem);
  letter-spacing: 0.06em;
  line-height: 1;
}

.concept-note {
  margin-top: 2rem;
  max-width: 46rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
}

.effects {
  background: var(--ink);
  color: var(--white);
}

.effects .eyebrow {
  color: var(--orange-hot);
}

.effects .section-lead {
  color: rgba(255, 255, 255, 0.7);
}

.effect-list {
  display: grid;
  gap: 0;
  margin-top: 2.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.effect-list li {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1rem;
  padding: 1.35rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.effect-num {
  font-family: var(--font-display);
  font-size: 1.65rem;
  letter-spacing: 0.04em;
  color: var(--orange);
  line-height: 1;
}

.effect-list h3 {
  margin-bottom: 0.35rem;
  font-size: 1.2rem;
}

.effect-list p {
  color: rgba(255, 255, 255, 0.68);
  max-width: 42rem;
}

.easy {
  background:
    linear-gradient(135deg, rgba(31, 79, 156, 0.06), transparent 45%),
    var(--paper-2);
}

.easy-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: end;
}

.easy .section-lead,
.easy p {
  color: var(--ink-soft);
}

.easy p + p {
  margin-top: 0.85rem;
}

.easy-steps {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
}

.easy-step {
  padding: 0.9rem 1.1rem;
  border: 1.5px solid var(--blue);
  background: rgba(255, 255, 255, 0.7);
  font-weight: 700;
}

.easy-step-final {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--white);
}

.easy-arrow {
  color: var(--blue);
  font-weight: 700;
}

.lesson .timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 2.75rem;
  position: relative;
}

.lesson .timeline::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 1.15rem;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--orange));
}

.timeline li {
  position: relative;
  padding-top: 2.6rem;
}

.timeline li::before {
  content: "";
  position: absolute;
  top: 0.7rem;
  left: 0;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--blue);
  border: 3px solid var(--paper);
  box-shadow: 0 0 0 2px var(--blue);
}

.timeline time {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.timeline strong {
  font-size: 1rem;
}

.curriculum {
  margin-top: 3.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--line);
}

.curriculum h3 {
  margin-bottom: 1.5rem;
  font-size: 1.35rem;
}

.level-track {
  display: grid;
  gap: 0.65rem;
}

.level-track li {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  gap: 0.85rem;
  align-items: center;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
  font-weight: 650;
}

.level-track span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  background: var(--blue);
  color: var(--white);
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}

.curriculum-note {
  margin-top: 1.25rem;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.sheet-point {
  margin-top: 2.5rem;
  padding: 1.75rem 0 0;
  border-top: 1px solid var(--line);
}

.sheet-point h3 {
  margin-bottom: 0.6rem;
  font-size: 1.25rem;
}

.sheet-point p {
  max-width: 40rem;
  color: var(--ink-soft);
}

.compare {
  background: var(--paper-2);
}

.compare-table-wrap {
  margin-top: 2.25rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.compare-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  background: rgba(255, 255, 255, 0.55);
}

.compare-table th,
.compare-table td {
  padding: 1rem 0.9rem;
  border: 1px solid var(--line);
  text-align: center;
  font-size: 0.95rem;
}

.compare-table thead th {
  font-weight: 800;
  background: rgba(20, 24, 32, 0.03);
}

.compare-table tbody th {
  text-align: left;
  font-weight: 700;
}

.compare-table .highlight {
  color: var(--orange);
  font-weight: 800;
  background: rgba(232, 90, 27, 0.06);
  border-color: rgba(232, 90, 27, 0.35);
}

.audience-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 2.25rem;
}

.audience-list li {
  padding: 1.35rem 1.25rem;
  border-left: 4px solid var(--blue);
  background: rgba(255, 255, 255, 0.55);
  font-weight: 700;
  font-size: 1.02rem;
  line-height: 1.45;
}

.audience-list li:nth-child(even) {
  border-left-color: var(--orange);
}

.pricing {
  background:
    radial-gradient(circle at 20% 20%, rgba(232, 90, 27, 0.1), transparent 40%),
    var(--ink);
  color: var(--white);
}

.pricing .eyebrow {
  color: var(--orange-hot);
}

.pricing .section-lead {
  color: rgba(255, 255, 255, 0.7);
}

.price-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
  max-width: 720px;
}

.price-option {
  display: grid;
  gap: 0.35rem;
  padding: 1.6rem 1.4rem;
  border: 1.5px solid rgba(255, 255, 255, 0.22);
  transition: border-color 0.2s ease, transform 0.2s var(--ease), background 0.2s ease;
}

.price-option:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.55);
}

.price-option-featured {
  border-color: var(--orange);
  background: rgba(232, 90, 27, 0.12);
}

.price-time {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.7);
}

.price-amount {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.price-desc {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.95rem;
}

.visit {
  position: relative;
}

.visit-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.visit-info {
  display: grid;
  gap: 1.35rem;
  margin: 1.75rem 0 2rem;
}

.visit-store,
.visit-contact {
  display: grid;
  gap: 0.35rem;
  color: var(--ink-soft);
}

.visit-store strong,
.visit-contact strong {
  color: var(--ink);
  font-size: 0.92rem;
}

.visit-contact a {
  color: var(--blue);
  font-weight: 700;
}

.visit-contact a:hover {
  color: var(--orange);
}

.visit-map {
  position: relative;
  min-height: 280px;
  background:
    linear-gradient(135deg, rgba(31, 79, 156, 0.08), rgba(232, 90, 27, 0.08)),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 28px,
      rgba(20, 24, 32, 0.06) 28px,
      rgba(20, 24, 32, 0.06) 29px
    ),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 28px,
      rgba(20, 24, 32, 0.06) 28px,
      rgba(20, 24, 32, 0.06) 29px
    ),
    #d9dde5;
  border: 1.5px solid var(--line);
  overflow: hidden;
}

.map-pin {
  position: absolute;
  left: 52%;
  top: 42%;
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50% 50% 50% 0;
  background: var(--orange);
  transform: translate(-50%, -50%) rotate(-45deg);
  animation: pin-bounce 2.4s var(--ease) infinite;
}

.map-pin::after {
  content: "";
  position: absolute;
  inset: 0.28rem;
  border-radius: 50%;
  background: var(--white);
}

.map-label {
  position: absolute;
  left: 1.1rem;
  bottom: 1rem;
  font-family: var(--font-display);
  letter-spacing: 0.16em;
  color: var(--ink-soft);
}

.slogan {
  width: min(1120px, 100%);
  margin: 3rem auto 0;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  letter-spacing: 0.06em;
  text-align: center;
}

.site-footer {
  padding: 2rem clamp(1.25rem, 4vw, 3rem) 2.5rem;
  border-top: 1px solid var(--line);
}

.footer-inner {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes hero-drift {
  from {
    transform: scale(1.04) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.08) translate3d(-1.5%, 1%, 0);
  }
}

@keyframes pulse-ring {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.75;
  }
  50% {
    transform: scale(1.06);
    opacity: 1;
  }
}

@keyframes pin-bounce {
  0%,
  100% {
    transform: translate(-50%, -50%) rotate(-45deg);
  }
  50% {
    transform: translate(-50%, -62%) rotate(-45deg);
  }
}

@media (max-width: 900px) {
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem 1.25rem 1.25rem;
    background: rgba(247, 244, 239, 0.98);
    border-bottom: 1px solid var(--line);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-cta {
    margin-top: 0.75rem;
    text-align: center;
    border-bottom: 0;
  }

  .nav-toggle {
    display: inline-block;
  }

  .nav-toggle[aria-expanded="true"] span:first-child {
    transform: translateY(4px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-4px) rotate(-45deg);
  }

  .hero-media img {
    object-position: 75% center;
  }

  .hero-pulse {
    opacity: 0.45;
  }

  .easy-grid,
  .visit-grid {
    grid-template-columns: 1fr;
  }

  .lesson .timeline {
    grid-template-columns: 1fr 1fr;
  }

  .lesson .timeline::before {
    display: none;
  }

  .audience-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero {
    align-items: end;
  }

  .hero-actions {
    width: 100%;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }

  .effect-list li {
    grid-template-columns: 3.2rem 1fr;
  }

  .lesson .timeline {
    grid-template-columns: 1fr;
  }

  .price-row {
    grid-template-columns: 1fr;
  }

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

  .concept-formula {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}