:root {
  --ink-900: #132033;
  --ink-700: #304156;
  --ink-500: #5e6b7b;
  --canvas: #f5f3ee;
  --surface: #fffcf7;
  --line: #ddd7cc;
  --line-soft: #eee7db;
  --primary: #0ea5a4;
  --primary-dark: #0b6e6d;
  --accent-lime: #c7f36b;
  --warning: #f4a261;
  --success: #2a9d8f;
  --danger: #e76f51;
  --shadow-soft: 0 28px 60px rgba(19, 32, 51, 0.08);
  --shadow-card: 0 18px 40px rgba(19, 32, 51, 0.08);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --font-ui: "SUIT Variable", "Pretendard", "Apple SD Gothic Neo", sans-serif;
  --font-data: "Space Grotesk", "SUIT Variable", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--ink-900);
  background:
    radial-gradient(circle at top left, rgba(199, 243, 107, 0.26), transparent 26%),
    radial-gradient(circle at 85% 12%, rgba(14, 165, 164, 0.14), transparent 20%),
    linear-gradient(180deg, #f7f4ed 0%, #f2eee6 100%);
}

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

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

.page-shell {
  width: min(1360px, calc(100% - 40px));
  margin: 0 auto;
  padding: 20px 0 72px;
}

.topbar {
  position: sticky;
  top: 18px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 18px;
  margin-bottom: 28px;
  background: rgba(255, 252, 247, 0.82);
  border: 1px solid rgba(221, 215, 204, 0.95);
  border-radius: 24px;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 114px;
  height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--ink-900);
  color: #fff;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.topnav {
  display: flex;
  gap: 22px;
  color: var(--ink-700);
  font-size: 14px;
  font-weight: 600;
}

.topnav a:hover,
.topnav a:focus-visible {
  color: var(--ink-900);
}

.ghost-button,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.ghost-button {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-900);
}

.primary-button {
  background: var(--ink-900);
  color: #fff;
  box-shadow: var(--shadow-card);
}

.secondary-button {
  background: rgba(14, 165, 164, 0.08);
  color: var(--primary-dark);
  border: 1px solid rgba(14, 165, 164, 0.18);
}

.ghost-button:hover,
.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-1px);
}

.hero {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 32px;
  align-items: center;
  min-height: 720px;
  padding: 36px 0 28px;
}

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

.eyebrow {
  margin: 0 0 16px;
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow-dark {
  color: rgba(255, 255, 255, 0.78);
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(42px, 6vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.05em;
}

h2 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

h3 {
  font-size: 20px;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.hero-body,
.section-intro p,
.problem-card p,
.feature-card p,
.artifact-card p,
.system-card p,
.role-list p,
.workflow-list p,
.cta-section p {
  color: var(--ink-700);
  font-size: 16px;
  line-height: 1.65;
}

.hero-body {
  max-width: 620px;
  margin-top: 24px;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 38px;
}

.stat-card {
  min-height: 146px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 252, 247, 0.86);
  box-shadow: var(--shadow-card);
}

.stat-card.accent-lime {
  background: linear-gradient(180deg, rgba(199, 243, 107, 0.55) 0%, rgba(255, 252, 247, 0.95) 100%);
}

.stat-label {
  display: block;
  margin-bottom: 18px;
  color: var(--ink-500);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.stat-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.stat-card p {
  color: var(--ink-700);
  font-size: 14px;
  line-height: 1.5;
}

.hero-visual {
  position: relative;
  min-height: 700px;
}

.visual-panel {
  position: absolute;
  overflow: hidden;
  border: 1px solid rgba(221, 215, 204, 0.9);
  border-radius: 26px;
  background: var(--surface);
  box-shadow: 0 30px 70px rgba(19, 32, 51, 0.16);
}

.visual-panel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.visual-main {
  inset: 40px 0 60px 90px;
}

.visual-float {
  width: 300px;
  height: 230px;
}

.visual-left {
  left: 0;
  bottom: 130px;
  transform: rotate(-5deg);
}

.visual-right {
  right: 10px;
  top: 0;
  transform: rotate(4deg);
}

.section-grid,
.feature-section,
.artifact-section,
.screen-section,
.proposal-section,
.cta-section {
  margin-top: 92px;
}

.section-grid {
  display: grid;
  gap: 24px;
}

.section-grid-tight {
  grid-template-columns: 1.05fr 0.95fr;
}

.section-intro {
  max-width: 760px;
}

.section-intro h2 {
  margin-bottom: 16px;
}

.problem-grid,
.feature-grid,
.artifact-grid,
.screen-grid,
.role-list {
  display: grid;
  gap: 18px;
}

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

.problem-card,
.feature-card,
.artifact-card,
.system-card,
.role-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 252, 247, 0.88);
  box-shadow: var(--shadow-card);
}

.problem-card {
  min-height: 240px;
  background:
    linear-gradient(180deg, rgba(255, 252, 247, 0.92), rgba(250, 246, 238, 0.9)),
    radial-gradient(circle at top right, rgba(14, 165, 164, 0.12), transparent 30%);
}

.problem-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin-bottom: 28px;
  border-radius: 14px;
  background: var(--ink-900);
  color: #fff;
  font-family: var(--font-data);
  font-size: 16px;
  font-weight: 700;
}

.problem-card h3,
.feature-card h3,
.role-list h3 {
  margin-bottom: 12px;
}

.dark-card {
  color: #fff;
  background:
    radial-gradient(circle at top right, rgba(199, 243, 107, 0.22), transparent 28%),
    linear-gradient(180deg, #132033 0%, #17273c 100%);
  border-color: rgba(255, 255, 255, 0.06);
}

.dark-card h2,
.dark-card strong {
  color: #fff;
}

.dark-card p {
  color: rgba(220, 231, 244, 0.84);
}

.workflow-list {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.workflow-list div {
  padding: 18px 18px 18px 20px;
  border-left: 3px solid var(--accent-lime);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 0 16px 16px 0;
}

.workflow-list strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}

.role-card h2 {
  margin-bottom: 24px;
}

.role-list article {
  padding: 18px 20px;
  border: 1px solid var(--line-soft);
  border-radius: 18px;
  background: rgba(248, 244, 236, 0.72);
}

.feature-grid {
  grid-template-columns: repeat(3, 1fr);
  margin-top: 28px;
}

.feature-card {
  min-height: 210px;
  position: relative;
}

.feature-card::after {
  content: "";
  position: absolute;
  right: 20px;
  bottom: 20px;
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(14, 165, 164, 0.18), rgba(199, 243, 107, 0.4));
}

.artifact-grid {
  grid-template-columns: repeat(3, 1fr);
  margin-top: 28px;
}

.artifact-card {
  min-height: 180px;
}

.artifact-card span {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(14, 165, 164, 0.08);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
}

.screen-grid {
  grid-template-columns: repeat(12, 1fr);
  margin-top: 28px;
}

.screen-card {
  grid-column: span 4;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: rgba(255, 252, 247, 0.9);
  box-shadow: var(--shadow-card);
}

.screen-card-wide {
  grid-column: span 8;
}

.screen-card img {
  width: 100%;
  aspect-ratio: 1.35 / 1;
  object-fit: cover;
  background: #efe8dc;
}

.screen-card figcaption {
  display: grid;
  gap: 8px;
  padding: 18px 20px 22px;
}

.screen-card strong {
  font-size: 18px;
  letter-spacing: -0.03em;
}

.screen-card span {
  color: var(--ink-700);
  font-size: 14px;
  line-height: 1.5;
}

.bullet-list {
  margin: 24px 0 0;
  padding-left: 20px;
  color: var(--ink-700);
  font-size: 15px;
  line-height: 1.7;
}

.bullet-list li + li {
  margin-top: 10px;
}

.alt-card {
  background:
    radial-gradient(circle at top left, rgba(199, 243, 107, 0.22), transparent 30%),
    rgba(255, 252, 247, 0.92);
}

.proposal-layout {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 18px;
  margin-top: 28px;
}

.proposal-main,
.proposal-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 252, 247, 0.9);
  box-shadow: var(--shadow-card);
}

.proposal-main h3 {
  margin: 14px 0 18px;
}

.proposal-main p + p {
  margin-top: 14px;
}

.proposal-badge,
.proposal-label {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.proposal-badge {
  background: rgba(19, 32, 51, 0.08);
  color: var(--ink-900);
}

.proposal-label {
  background: rgba(14, 165, 164, 0.08);
  color: var(--primary-dark);
}

.proposal-points {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 24px;
}

.proposal-points div {
  padding: 18px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(248, 244, 236, 0.96), rgba(255, 252, 247, 0.96));
  border: 1px solid var(--line-soft);
}

.proposal-points strong {
  display: block;
  margin-bottom: 10px;
  font-size: 17px;
  letter-spacing: -0.03em;
}

.proposal-side {
  display: grid;
  gap: 18px;
}

.proposal-card strong {
  display: block;
  margin: 14px 0 10px;
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.cta-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: stretch;
  padding: 34px;
  border: 1px solid rgba(19, 32, 51, 0.08);
  border-radius: 32px;
  background:
    radial-gradient(circle at top right, rgba(14, 165, 164, 0.16), transparent 24%),
    linear-gradient(180deg, #132033 0%, #17273c 100%);
  box-shadow: var(--shadow-soft);
}

.cta-section h2,
.cta-section p {
  color: #fff;
}

.cta-section p {
  margin-top: 14px;
  color: rgba(220, 231, 244, 0.86);
}

.cta-box {
  display: grid;
  align-content: center;
  gap: 10px;
  padding: 28px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-box span {
  color: var(--accent-lime);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.cta-box strong {
  color: #fff;
  font-size: 28px;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

@media (max-width: 1180px) {
  .hero,
  .section-grid-tight,
  .proposal-layout,
  .cta-section {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 580px;
  }

  .visual-main {
    inset: 40px 30px 40px 30px;
  }
}

@media (max-width: 980px) {
  .page-shell {
    width: min(100% - 24px, 1360px);
  }

  .topbar {
    flex-wrap: wrap;
    justify-content: center;
  }

  .topnav {
    order: 3;
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero-stats,
  .problem-grid,
  .feature-grid,
  .artifact-grid,
  .proposal-points {
    grid-template-columns: 1fr;
  }

  .screen-grid {
    grid-template-columns: 1fr;
  }

  .screen-card,
  .screen-card-wide {
    grid-column: auto;
  }
}

@media (max-width: 720px) {
  body {
    background:
      radial-gradient(circle at top, rgba(199, 243, 107, 0.24), transparent 24%),
      linear-gradient(180deg, #f7f4ed 0%, #f2eee6 100%);
  }

  .page-shell {
    width: min(100% - 16px, 1360px);
    padding-top: 10px;
  }

  .topbar {
    top: 10px;
    padding: 14px;
    border-radius: 20px;
  }

  .hero {
    min-height: auto;
    gap: 20px;
    padding-top: 8px;
  }

  .hero-copy {
    padding-top: 8px;
  }

  h1 {
    font-size: 40px;
  }

  .hero-body,
  .section-intro p,
  .problem-card p,
  .feature-card p,
  .artifact-card p,
  .system-card p,
  .role-list p,
  .workflow-list p,
  .cta-section p {
    font-size: 15px;
  }

  .hero-visual {
    min-height: 360px;
  }

  .visual-main {
    inset: 46px 0 20px 0;
    border-radius: 18px;
  }

  .visual-float {
    display: none;
  }

  .section-grid,
  .feature-section,
  .artifact-section,
  .screen-section,
  .proposal-section,
  .cta-section {
    margin-top: 64px;
  }

  .problem-card,
  .feature-card,
  .artifact-card,
  .system-card,
  .role-card,
  .proposal-main,
  .proposal-card,
  .cta-section {
    padding: 22px;
    border-radius: 24px;
  }
}