:root {
  --bg: #ffffff;
  --paper: #f7f9fc;
  --paper-deep: #eef2f7;
  --tint: #f1f5fd;
  --surface: #ffffff;
  --ink: #191f28;
  --ink-soft: #596370;
  --soft: #596370;
  --muted: #76808e;
  --line: #e5e8ec;
  --line-strong: #cfd5df;
  --accent: #1d56d8;
  --accent-hover: #1746b3;
  --accent-soft: #eef3fe;
  --navy: #191f28;
  --danger: #c6372f;
  --sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", system-ui, sans-serif;
  --serif: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
  --radius-sm: 6px;
  --radius: 8px;
  --radius-lg: 12px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size-adjust: from-font;
  line-height: 1.6;
  word-break: keep-all;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--paper-deep);
  padding: 0.12em 0.4em;
  border-radius: 4px;
  color: var(--ink);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  inset-block-start: -7rem;
  inset-inline-start: 1rem;
  z-index: 100;
  background: var(--ink);
  color: #ffffff;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
}

.skip-link:focus {
  inset-block-start: 1rem;
}

.page-frame {
  inline-size: min(100% - clamp(2rem, 6vw, 6rem), 1240px);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  border-block-end: 1px solid var(--line);
}

.header-inner {
  min-block-size: 4.75rem;
  display: flex;
  align-items: safe center;
  justify-content: space-between;
  gap: 1.5rem;
}

.wordmark {
  display: inline-flex;
  align-items: safe center;
  gap: 0.65rem;
  white-space: nowrap;
}

.wordmark-mark {
  display: inline-flex;
  align-items: baseline;
  justify-content: center;
  inline-size: 1.9rem;
  block-size: 1.9rem;
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  padding-block-start: 0.36rem;
}

.wordmark-mark span {
  color: #5b95ff;
  margin-inline-start: 0.03em;
}

.wordmark-text {
  font-size: 1.2rem;
  font-weight: 720;
  letter-spacing: -0.04em;
  color: var(--ink);
}

.wordmark-dot {
  color: var(--accent);
}

.wordmark-sub {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--muted);
  padding-inline-start: 0.65rem;
  border-inline-start: 1px solid var(--line);
}

.site-nav {
  display: flex;
  align-items: safe center;
  gap: clamp(1.25rem, 2.5vw, 2.25rem);
  font-size: 0.9rem;
  font-weight: 550;
  color: var(--ink-soft);
}

.site-nav a {
  padding-block: 0.5rem;
  transition: color 0.18s ease;
}

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

.header-actions {
  display: flex;
  align-items: safe center;
  gap: 1rem;
}

.header-login {
  font-size: 0.875rem;
  font-weight: 580;
  color: var(--ink-soft);
  padding: 0.45rem 0.4rem;
  transition: color 0.18s ease;
}

.header-login:hover {
  color: var(--ink);
}

.header-cta {
  display: inline-flex;
  align-items: safe center;
  gap: 0.45rem;
  min-block-size: 2.4rem;
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background: #ffffff;
  font-size: 0.84rem;
  font-weight: 640;
  color: var(--ink);
  white-space: nowrap;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.header-cta:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

/* Shared Labels & Buttons */
.eyebrow,
.section-index {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

.eyebrow {
  display: inline-flex;
  align-items: safe center;
  gap: 0.5rem;
}

.eyebrow-dot {
  inline-size: 0.42rem;
  block-size: 0.42rem;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.section-index {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.button {
  display: inline-flex;
  align-items: safe center;
  justify-content: center;
  gap: 0.7rem;
  min-block-size: 3.05rem;
  padding: 0.75rem 1.3rem;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 640;
  line-height: 1.25;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--ink);
  color: #ffffff;
}

.button-primary:hover {
  background: var(--accent);
}

.button-secondary {
  background: #ffffff;
  color: var(--ink);
  border-color: var(--line-strong);
}

.button-secondary:hover {
  border-color: var(--ink);
  background: var(--paper);
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: center;
  padding-block: clamp(3.5rem, 6vw, 5.75rem) clamp(4rem, 7vw, 6.25rem);
}

.hero h1 {
  font-size: clamp(2.25rem, 1.45rem + 2.35vw, 3.35rem);
  font-weight: 680;
  line-height: 1.3;
  letter-spacing: -0.045em;
  margin-block: 1.15rem 1.25rem;
  text-wrap: balance;
}

.hero h1 span {
  color: var(--accent);
}

.hero-lead {
  margin: 0;
  max-inline-size: 54ch;
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.08rem);
  line-height: 1.82;
  letter-spacing: -0.015em;
  color: var(--ink-soft);
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: safe center;
  gap: 0.75rem;
  margin-block-start: 2rem;
}

.hero-facts {
  margin-block: 2.4rem 0;
  padding-block-start: 1.35rem;
  border-block-start: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.hero-facts dt {
  font-size: 0.82rem;
  font-weight: 660;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.hero-facts dd {
  margin: 0.25rem 0 0;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.45;
}

/* Hero Specimen Plate */
.hero-specimen {
  min-inline-size: 0;
}

.specimen-frame {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(0.75rem, 1.5vw, 1.15rem);
}

.specimen-card {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 16px 40px rgba(20, 28, 40, 0.055);
  overflow: clip;
}

.specimen-bar {
  display: flex;
  align-items: safe center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.7rem 1.15rem;
  background: var(--paper);
  border-block-end: 1px solid var(--line);
  font-size: 0.75rem;
}

.specimen-url {
  font-family: var(--mono);
  color: var(--ink-soft);
  display: inline-flex;
  align-items: safe center;
  gap: 0.45rem;
  min-inline-size: 0;
}

.url-lock {
  color: var(--accent);
  font-size: 0.55rem;
}

.specimen-badge {
  font-size: 0.7rem;
  font-weight: 650;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  white-space: nowrap;
}

.specimen-head {
  padding: 1.25rem 1.35rem 1.1rem;
  border-block-end: 1px solid var(--line);
}

.specimen-identity {
  display: flex;
  align-items: safe center;
  gap: 0.8rem;
}

.specimen-avatar {
  inline-size: 2.5rem;
  block-size: 2.5rem;
  border-radius: 50%;
  background: var(--ink);
  color: #ffffff;
  display: grid;
  place-items: center;
  font-size: 0.95rem;
  font-weight: 680;
  flex-shrink: 0;
}

.specimen-name {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.45rem;
}

.specimen-name strong {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.specimen-name span {
  font-size: 0.78rem;
  color: var(--muted);
}

.specimen-role {
  margin: 0.2rem 0 0;
  font-size: 0.76rem;
  color: var(--accent);
  font-weight: 560;
}

.specimen-bio {
  margin: 0.85rem 0 0;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--ink-soft);
}

.specimen-section-bar {
  display: flex;
  align-items: safe center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.65rem 1.35rem;
  background: #fafbfd;
  border-block-end: 1px solid var(--line);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.specimen-private-note {
  letter-spacing: -0.01em;
  font-weight: 580;
  color: var(--ink-soft);
}

.specimen-list {
  list-style: none;
  margin: 0;
  padding: 0 1.35rem;
}

.specimen-list li {
  display: grid;
  grid-template-columns: 3.6rem minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: start;
  padding-block: 0.82rem;
  border-block-end: 1px solid var(--line);
}

.specimen-list li:last-child {
  border-block-end: 0;
}

.spec-year {
  font-size: 0.75rem;
  font-weight: 620;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  padding-block-start: 0.12rem;
}

.spec-main {
  min-inline-size: 0;
}

.spec-main strong {
  display: block;
  font-size: 0.85rem;
  font-weight: 620;
  line-height: 1.45;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.spec-main span {
  display: block;
  margin-block-start: 0.2rem;
  font-size: 0.73rem;
  color: var(--muted);
}

.spec-kind {
  font-size: 0.69rem;
  font-weight: 620;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  white-space: nowrap;
}

.specimen-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: safe center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.75rem 1.35rem;
  background: var(--tint);
  border-block-start: 1px solid #dce6fa;
  font-size: 0.74rem;
  color: var(--ink-soft);
}

.specimen-exports {
  display: inline-flex;
  gap: 0.4rem;
}

.specimen-exports span {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  background: #ffffff;
  border: 1px solid #cddbf8;
  padding: 0.18rem 0.5rem;
  border-radius: 4px;
}

/* Sections */
.section-block {
  padding-block: clamp(4.5rem, 7vw, 6.5rem);
  border-block-start: 1px solid var(--line);
}

.section-tinted {
  background: var(--paper);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: end;
  margin-block-end: clamp(2.5rem, 4.5vw, 3.75rem);
}

.section-head h2 {
  font-size: clamp(1.7rem, 1.25rem + 1.5vw, 2.35rem);
  font-weight: 670;
  line-height: 1.35;
  letter-spacing: -0.042em;
  margin: 0.65rem 0 0;
  text-wrap: balance;
}

.section-lead {
  margin: 0;
  max-inline-size: 52ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--ink-soft);
  text-wrap: pretty;
}

/* Section 01: Pillars */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
}

.pillar {
  grid-row: span 3;
  display: grid;
  grid-template-rows: auto auto 1fr;
  grid-template-rows: subgrid;
  row-gap: 0.7rem;
  padding-block-start: 1.5rem;
  border-block-start: 2px solid var(--ink);
}

.pillar-num {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.pillar h3 {
  margin: 0;
  font-size: 1.18rem;
  font-weight: 660;
  line-height: 1.45;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.pillar p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--ink-soft);
  text-wrap: pretty;
}

/* Section 02: Workflow Ledger */
.workflow-list {
  border-block-start: 2px solid var(--ink);
}

.workflow-row {
  display: grid;
  grid-template-columns: 9.5rem minmax(0, 1fr) auto;
  gap: 2rem;
  align-items: start;
  padding-block: 1.9rem;
  border-block-end: 1px solid var(--line);
}

.workflow-step {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  padding-block-start: 0.15rem;
}

.step-num {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
}

.step-tag {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  color: var(--muted);
}

.workflow-body h3 {
  margin: 0 0 0.45rem;
  font-size: 1.16rem;
  font-weight: 660;
  line-height: 1.45;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.workflow-body p {
  margin: 0;
  max-inline-size: 62ch;
  font-size: 0.93rem;
  line-height: 1.76;
  color: var(--ink-soft);
  text-wrap: pretty;
}

.workflow-chips {
  list-style: none;
  margin: 0;
  padding: 0.15rem 0 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.45rem;
}

.workflow-chips li {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink-soft);
  background: #ffffff;
  border: 1px solid var(--line-strong);
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  white-space: nowrap;
}

/* Section 03: Deliverables */
.deliverables-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem;
}

.deliverable-card {
  grid-row: span 3;
  display: grid;
  grid-template-rows: auto auto 1fr;
  grid-template-rows: subgrid;
  row-gap: 1rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.1rem);
}

.deliverable-top h3 {
  margin: 0.45rem 0 0;
  font-size: 1.32rem;
  font-weight: 680;
  letter-spacing: -0.035em;
}

.deliverable-desc {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--ink-soft);
  text-wrap: pretty;
}

.mini-preview {
  align-self: end;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: clip;
}

.mini-bar {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.55rem 0.9rem;
  background: #fafbfd;
  border-block-end: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
}

.mini-bar span:last-child {
  font-family: var(--sans);
  font-weight: 640;
  color: var(--accent);
}

.mini-body {
  padding: 0.85rem 0.95rem;
}

.mini-title-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  padding-block-end: 0.6rem;
  border-block-end: 1px solid var(--ink);
  margin-block-end: 0.35rem;
}

.mini-title-row strong {
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.mini-title-row span {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
}

.mini-line {
  display: grid;
  grid-template-columns: 2.3rem minmax(0, 1fr) auto;
  gap: 0.5rem;
  padding-block: 0.5rem;
  border-block-end: 1px solid var(--line);
  font-size: 0.76rem;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.mini-line:last-child {
  border-block-end: 0;
  padding-block-end: 0.1rem;
}

.mini-line span:first-child {
  color: var(--muted);
  font-weight: 600;
}

.mini-line span:nth-child(2) {
  white-space: nowrap;
  overflow: clip;
  text-overflow: ellipsis;
}

.mini-line span:last-child {
  color: var(--ink-soft);
  font-size: 0.7rem;
}

/* Closing Callout */
.closing-band {
  background: var(--tint);
  border-block-start: 1px solid #dde6f7;
  padding-block: clamp(3.75rem, 6vw, 5.25rem);
}

.closing-inner {
  display: flex;
  align-items: safe center;
  justify-content: space-between;
  gap: 2.5rem;
}

.closing-inner h2 {
  font-size: clamp(1.65rem, 1.2rem + 1.5vw, 2.25rem);
  font-weight: 680;
  line-height: 1.35;
  letter-spacing: -0.04em;
  margin: 0.7rem 0 0.65rem;
  text-wrap: balance;
}

.closing-inner p:last-child {
  margin: 0;
  max-inline-size: 56ch;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--ink-soft);
  text-wrap: pretty;
}

.closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* Footer */
.site-footer {
  border-block-start: 1px solid var(--line);
  padding-block: 2.5rem;
  background: #ffffff;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: safe center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-brand p {
  margin: 0.5rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.84rem;
  font-weight: 550;
  color: var(--ink-soft);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-copy {
  margin: 0;
  font-size: 0.78rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* Responsive */
@media (max-width: 980px) {
  .wordmark-sub {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 2.75rem;
  }

  .section-head {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .pillars-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .pillar {
    grid-row: auto;
    grid-template-rows: auto;
  }

  .workflow-row {
    grid-template-columns: 7.5rem minmax(0, 1fr);
    gap: 1rem;
  }

  .workflow-chips {
    grid-column: 2;
    justify-content: flex-start;
  }

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

  .deliverable-card {
    grid-row: auto;
    grid-template-rows: auto;
  }

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

@media (max-width: 680px) {
  .header-login {
    display: none;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 0;
  }

  .site-nav {
    order: 3;
    inline-size: 100%;
    overflow-x: auto;
    white-space: nowrap;
    gap: 1.3rem;
    border-block-start: 1px solid var(--line);
    padding-block: 0.15rem;
    scrollbar-width: thin;
  }

  .header-inner {
    min-block-size: 4.1rem;
  }

  .hero {
    padding-block: 2.5rem 3.5rem;
  }

  .hero-facts {
    grid-template-columns: 1fr;
    gap: 0.85rem;
  }

  .specimen-head,
  .specimen-section-bar,
  .specimen-list,
  .specimen-foot {
    padding-inline: 1rem;
  }

  .specimen-list li {
    grid-template-columns: 3.3rem minmax(0, 1fr);
  }

  .spec-kind {
    display: none;
  }

  .workflow-row {
    grid-template-columns: 1fr;
    gap: 0.65rem;
    padding-block: 1.5rem;
  }

  .workflow-chips {
    grid-column: 1;
  }

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

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

  .button,
  .site-nav a,
  .header-cta,
  .header-login {
    transition: none;
  }
}