:root {
  --ink: #10131a;
  --muted: #626b7a;
  --line: #dce2ea;
  --surface: #ffffff;
  --surface-alt: #f4f7fb;
  --charcoal: #151924;
  --charcoal-2: #202637;
  --cyan: #16b7d5;
  --cyan-dark: #087b91;
  --amber: #f5a623;
  --green: #24a66a;
  --red: #d94c4c;
  --shadow: 0 24px 70px rgba(16, 19, 26, 0.14);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Pretendard", "Noto Sans KR", "Segoe UI", Arial, sans-serif;
  background: var(--surface);
  letter-spacing: 0;
}

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

button,
input,
textarea {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 5vw;
  border-bottom: 1px solid rgba(220, 226, 234, 0.72);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--charcoal);
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: var(--radius);
  color: #ffffff;
  background: linear-gradient(135deg, var(--charcoal), var(--cyan-dark));
  font-size: 13px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
}

.site-nav a:hover {
  color: var(--ink);
}

.nav-cta {
  padding: 10px 16px;
  border-radius: var(--radius);
  color: #ffffff !important;
  background: var(--charcoal);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.section {
  padding: 92px 5vw;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 560px);
  gap: 56px;
  align-items: center;
  min-height: calc(100vh - 72px);
  color: #ffffff;
  background:
    linear-gradient(120deg, rgba(21, 25, 36, 0.98), rgba(32, 38, 55, 0.94)),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 72px);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

.hero h1 {
  margin: 0;
  font-size: 64px;
  line-height: 1.06;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 720px;
  margin: 28px 0 0;
  color: #d9e3ec;
  font-size: 20px;
  line-height: 1.75;
}

.hero-caption {
  max-width: 720px;
  margin: 12px 0 0;
  color: #9fb1bf;
  font-size: 14px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-weight: 800;
  white-space: nowrap;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

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

.button.primary {
  color: #071014;
  background: var(--cyan);
  box-shadow: 0 18px 36px rgba(22, 183, 213, 0.28);
}

.button.secondary {
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.08);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  max-width: 680px;
  margin: 42px 0 0;
}

.hero-stats div {
  min-height: 104px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.07);
}

.hero-stats dt {
  margin-bottom: 7px;
  color: #ffffff;
  font-size: 23px;
  font-weight: 900;
}

.hero-stats dd {
  margin: 0;
  color: #bfd0dc;
  font-size: 14px;
  line-height: 1.5;
}

.product-visual {
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: #f8fbff;
  color: var(--ink);
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.28);
  overflow: hidden;
}

.visual-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 18px;
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

.visual-toolbar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--line);
}

.visual-toolbar span:nth-child(1) {
  background: var(--red);
}

.visual-toolbar span:nth-child(2) {
  background: var(--amber);
}

.visual-toolbar span:nth-child(3) {
  background: var(--green);
}

.visual-toolbar strong {
  margin-left: auto;
  color: var(--muted);
  font-size: 13px;
}

.visual-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 18px;
}

.visual-step {
  min-height: 118px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.visual-step.active {
  color: #ffffff;
  background: var(--charcoal);
  border-color: var(--charcoal);
}

.visual-step span {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
}

.visual-step strong {
  display: block;
  font-size: 16px;
}

.visual-step p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.visual-step.active p {
  color: #c7d7e3;
}

.visual-table {
  margin: 0 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  overflow: hidden;
}

.table-row {
  display: grid;
  grid-template-columns: 1fr 1.4fr 1fr;
  gap: 12px;
  min-height: 44px;
  align-items: center;
  padding: 0 16px;
  border-top: 1px solid #edf1f5;
  font-size: 14px;
}

.table-row:first-child {
  border-top: 0;
}

.table-head {
  color: var(--muted);
  background: var(--surface-alt);
  font-weight: 800;
}

.table-row span:last-child {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.visual-alert {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  margin: 0 18px 18px;
  padding: 14px 16px;
  border-radius: var(--radius);
  color: #072018;
  background: rgba(36, 166, 106, 0.14);
}

.visual-alert span {
  color: #31564a;
  font-size: 14px;
}

.hero-screenshot {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top left;
}

.section-heading {
  max-width: 860px;
  margin-bottom: 34px;
}

.section-heading h2,
.accuracy-panel h2,
.download-copy h2 {
  margin: 0;
  color: var(--charcoal);
  font-size: 38px;
  line-height: 1.24;
  letter-spacing: 0;
}

.section-heading p:not(.eyebrow),
.download-copy p,
.accuracy-panel p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.problem-section,
.process-section {
  background: var(--surface-alt);
}

.problem-grid,
.feature-grid,
.pricing-grid,
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.problem-grid article,
.feature-card,
.price-card,
.contact-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: 0 12px 34px rgba(16, 19, 26, 0.06);
}

.problem-grid article {
  min-height: 230px;
  padding: 26px;
}

.tag {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 6px 10px;
  border-radius: var(--radius);
  color: var(--cyan-dark);
  background: rgba(22, 183, 213, 0.12);
  font-size: 13px;
  font-weight: 900;
}

.tag.accent {
  color: #7a4d00;
  background: rgba(245, 166, 35, 0.18);
}

.tag.green {
  color: #0b6b41;
  background: rgba(36, 166, 106, 0.14);
}

.problem-grid h3,
.feature-card h3,
.program-item h3,
.price-card h3 {
  margin: 0 0 12px;
  color: var(--charcoal);
  font-size: 21px;
  line-height: 1.35;
}

.problem-grid p,
.feature-card p,
.program-item p,
.price-card p,
.section-note {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card {
  min-height: 286px;
  padding: 24px;
}

.feature-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  margin-bottom: 24px;
  border-radius: var(--radius);
  color: #ffffff;
  background: var(--cyan-dark);
  font-size: 13px;
  font-weight: 900;
}

.feature-icon.amber {
  background: var(--amber);
  color: #241500;
}

.feature-icon.green {
  background: var(--green);
}

.feature-icon.red {
  background: var(--red);
}

.feature-icon.purple {
  background: #7c5cff;
}

.feature-icon.slate {
  background: var(--charcoal);
}

.accuracy-section {
  padding-top: 40px;
  padding-bottom: 40px;
}

.accuracy-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 38px;
  align-items: center;
  padding: 34px;
  border-radius: var(--radius);
  color: #ffffff;
  background:
    linear-gradient(135deg, rgba(21, 25, 36, 0.98), rgba(8, 123, 145, 0.94)),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.045) 0 1px, transparent 1px 52px);
}

.accuracy-panel h2,
.accuracy-panel p {
  color: #ffffff;
}

.accuracy-panel p {
  margin: 0;
  color: #d8eaf0;
}

.api-section {
  padding-top: 36px;
  padding-bottom: 36px;
  background: var(--surface-alt);
}

.api-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 38px;
  align-items: center;
  padding: 30px;
  border: 1px solid rgba(245, 166, 35, 0.34);
  border-radius: var(--radius);
  background: #fff9ef;
}

.api-panel h2 {
  margin: 0;
  color: var(--charcoal);
  font-size: 32px;
  line-height: 1.25;
}

.api-panel p {
  margin: 0;
  color: #6b4d1e;
  font-size: 17px;
  line-height: 1.75;
}

.screenshot-section {
  background: var(--surface-alt);
}

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

.program-screens {
  display: grid;
  gap: 42px;
}

.screen-group {
  display: grid;
  gap: 18px;
}

.screen-group-heading {
  display: grid;
  gap: 8px;
  max-width: 920px;
}

.screen-group-heading h3 {
  margin: 0;
  color: var(--charcoal);
  font-size: 28px;
  line-height: 1.25;
}

.screen-group-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}

.screenshot-grid.single {
  grid-template-columns: 1fr;
}

.screen-card {
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: 0 12px 34px rgba(16, 19, 26, 0.06);
}

.screen-card.large {
  grid-column: span 2;
}

.screen-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  object-position: top left;
  border-bottom: 1px solid var(--line);
  background: #eef3f8;
}

.screen-card:not(.large) img {
  aspect-ratio: 16 / 9;
}

.screen-card div {
  padding: 22px;
}

.screen-card span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--cyan-dark);
  font-size: 13px;
  font-weight: 900;
}

.screen-card h3 {
  margin: 0 0 10px;
  color: var(--charcoal);
  font-size: 22px;
  line-height: 1.35;
}

.screen-card p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
}

.program-list {
  display: grid;
  gap: 14px;
}

.program-item {
  display: grid;
  grid-template-columns: minmax(220px, 0.6fr) minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.program-item.highlight {
  border-color: rgba(22, 183, 213, 0.42);
  background: linear-gradient(90deg, #ffffff, #f1fbfd);
}

.program-code {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--cyan-dark);
  font-size: 13px;
  font-weight: 900;
}

.price-card {
  position: relative;
  min-height: 220px;
  padding: 26px;
}

.price-card strong {
  display: block;
  margin-top: 30px;
  color: var(--charcoal);
  font-size: 30px;
  font-weight: 900;
}

.pricing-title {
  margin: 0 0 14px;
  color: var(--charcoal);
  font-size: 22px;
}

.pricing-title.second {
  margin-top: 38px;
}

.price-card.featured {
  border-color: var(--cyan);
  box-shadow: var(--shadow);
}

.badge {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 6px 10px;
  border-radius: var(--radius);
  color: #071014;
  background: var(--cyan);
  font-size: 12px;
  font-weight: 900;
}

.section-note {
  margin-top: 18px;
}

.process-list {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.process-list li {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 132px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  color: var(--charcoal);
  font-weight: 800;
  line-height: 1.45;
}

.process-list span {
  color: var(--cyan-dark);
  font-size: 13px;
  font-weight: 900;
}

.download-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
  color: #ffffff;
  background: var(--charcoal);
}

.download-copy {
  max-width: 780px;
}

.download-copy h2,
.download-copy p {
  color: #ffffff;
}

.download-copy p {
  color: #d3dde8;
}

.contact-section {
  background: #ffffff;
}

.contact-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.contact-card {
  display: flex;
  min-height: 168px;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.contact-card:hover {
  transform: translateY(-3px);
  border-color: var(--cyan);
}

.contact-card span {
  color: var(--cyan-dark);
  font-size: 13px;
  font-weight: 900;
}

.contact-card strong {
  color: var(--charcoal);
  font-size: 22px;
}

.contact-card em {
  color: var(--muted);
  font-style: normal;
}

.policy-section {
  padding: 64px 5vw;
  background: #0f131b;
  color: #dbe5ee;
}

.policy-inner {
  display: grid;
  gap: 14px;
  max-width: 1120px;
  margin: 0 auto;
}

.business-info {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
}

.business-info strong {
  color: #ffffff;
}

.business-info span {
  color: #b8c7d3;
  font-size: 14px;
}

details {
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
}

summary {
  cursor: pointer;
  padding: 18px 22px;
  color: #ffffff;
  font-weight: 900;
}

.policy-copy {
  padding: 0 22px 22px;
}

.policy-copy p {
  margin: 12px 0 0;
  color: #c4d1dc;
  font-size: 15px;
  line-height: 1.75;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 5vw;
  color: #b8c7d3;
  background: #0a0d12;
  font-size: 14px;
}

.site-footer a {
  color: #ffffff;
  font-weight: 800;
}

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 30;
  max-width: min(360px, calc(100vw - 40px));
  padding: 14px 16px;
  border-radius: var(--radius);
  color: #ffffff;
  background: var(--charcoal);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

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

  .process-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .site-header {
    min-height: 64px;
  }

  .menu-button {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 64px;
    right: 5vw;
    left: 5vw;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #ffffff;
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    padding: 14px;
  }

  .nav-cta {
    text-align: center;
  }

  .section {
    padding: 70px 5vw;
  }

  .hero {
    padding-top: 64px;
  }

  .hero h1 {
    font-size: 42px;
  }

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

  .hero-stats,
  .visual-grid,
  .problem-grid,
  .pricing-grid,
  .contact-grid,
  .accuracy-panel,
  .api-panel,
  .screenshot-grid,
  .program-item,
  .business-info {
    grid-template-columns: 1fr;
  }

  .screen-card.large {
    grid-column: auto;
  }

  .screen-card img,
  .screen-card:not(.large) img {
    aspect-ratio: 16 / 10;
  }

  .product-visual {
    min-width: 0;
  }

  .section-heading h2,
  .accuracy-panel h2,
  .download-copy h2 {
    font-size: 30px;
  }

  .download-section {
    align-items: stretch;
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .feature-grid,
  .process-list {
    grid-template-columns: 1fr;
  }

  .hero-stats div,
  .feature-card,
  .price-card,
  .contact-card,
  .process-list li {
    min-height: auto;
  }

  .table-row {
    grid-template-columns: 0.9fr 1fr 0.9fr;
    gap: 8px;
    padding: 0 10px;
    font-size: 12px;
  }

  .visual-alert {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-footer {
    flex-direction: column;
  }
}