:root {
  --bg: #ffffff;
  --text: #1f2937;
  --strong: #111827;
  --muted: #667085;
  --light: #98a2b3;
  --line: #e5e7eb;
  --soft: #f8fafc;
  --accent: #3c78d8;
  --accent-soft: #eff6ff;
  --max-width: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.75;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

.web-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px max(24px, calc((100vw - var(--max-width))/2));
  border-bottom: 1px solid rgba(229,231,235,.9);
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(10px);
  font-size: 14px;
}
.web-header .back { font-weight: 700; }
.web-header .actions { display: flex; gap: 10px; align-items: center; }
.web-header button,
.web-header .link-button {
  border: 1px solid var(--line);
  background: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  font: inherit;
  cursor: pointer;
}

.project-document {
  width: min(var(--max-width), calc(100% - 48px));
  margin: 0 auto;
  padding: 54px 0 80px;
}

.project-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 44px;
  padding: 22px 0 42px;
  border-bottom: 1px solid var(--line);
}
.kicker {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .08em;
}
.project-hero h1 {
  margin: 0;
  color: var(--strong);
  font-size: clamp(38px, 5vw, 62px);
  line-height: 1.08;
  letter-spacing: -.045em;
}
.hero-subtitle {
  margin: 18px 0 0;
  color: #344054;
  font-size: 21px;
  line-height: 1.55;
}
.hero-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 14px;
}
.meta-card {
  align-self: start;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
}
.meta-row {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 16px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
}
.meta-row:last-child { border-bottom: 0; }
.meta-row span { color: var(--light); font-size: 11px; font-weight: 800; letter-spacing: .05em; }
.meta-row strong { color: var(--strong); font-size: 14px; line-height: 1.45; }

.section {
  scroll-margin-top: 86px;
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 46px;
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}
.section-label span { display: block; color: var(--light); font-size: 12px; font-weight: 700; margin-bottom: 4px; }
.section-label h2 { margin: 0; color: var(--accent); font-size: 23px; line-height: 1.25; letter-spacing: -.02em; }
.section-body { min-width: 0; }
.section-body > p:first-child { margin-top: 0; }
.lead { color: var(--strong); font-size: 19px; font-weight: 600; line-height: 1.7; }
.role-grid + .lead { margin-top: 26px; }

.quick-grid,
.role-grid,
.decision-grid,
.result-grid,
.signal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  background: #fff;
}
.card .mini-label,
.case-step .mini-label {
  display: block;
  margin-bottom: 5px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .06em;
}
.card strong { display: block; color: var(--strong); font-size: 16px; line-height: 1.45; }
.card p { margin: 8px 0 0; color: var(--muted); font-size: 14px; line-height: 1.65; }

.problem-flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.case-step {
  position: relative;
  min-height: 160px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--soft);
}
.case-step strong { display: block; color: var(--strong); font-size: 16px; line-height: 1.45; }
.case-step p { margin: 9px 0 0; color: var(--muted); font-size: 14px; }

.asis-tobe {
  display: grid;
  grid-template-columns: 1fr 46px 1fr;
  gap: 16px;
  align-items: stretch;
}
.state-box { border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.state-box h3 { margin: 0 0 12px; font-size: 17px; color: var(--strong); }
.state-box ul { margin: 0; padding-left: 20px; }
.state-box li { margin: 7px 0; color: #475467; font-size: 14px; }
.state-box.to { border-color: #cfe0ff; background: var(--accent-soft); }
.arrow { display: grid; place-items: center; color: var(--accent); font-size: 24px; font-weight: 700; }

.flow {
  display: grid;
  /* 6 nodes with a narrow arrow column between each pair */
  grid-template-columns: repeat(5, minmax(0, 1fr) 14px) minmax(0, 1fr);
  gap: 6px;
  align-items: center;
}
.flow .node {
  min-height: 92px;
  display: grid;
  place-items: center;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  color: var(--strong);
  font-size: 13px;
  font-weight: 700;
  background: #fff;
}
.flow .node small { display: block; margin-top: 4px; color: var(--muted); font-size: 11px; font-weight: 500; line-height: 1.45; }
.flow .arrow-inline { text-align: center; color: var(--accent); font-weight: 800; }

.codebox {
  margin-top: 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0f172a;
  color: #e5e7eb;
  overflow: auto;
  font-family: "Noto Sans Mono CJK KR", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  line-height: 1.65;
  white-space: pre;
}

.bullets { margin: 0; padding-left: 21px; }
.bullets li { margin: 9px 0; padding-left: 2px; }

.decision-grid .card { min-height: 155px; }

.evidence-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.evidence-table th,
.evidence-table td { padding: 13px 12px; border-bottom: 1px solid var(--line); vertical-align: top; text-align: left; }
.evidence-table th { width: 155px; color: var(--accent); font-size: 12px; letter-spacing: .03em; }
.evidence-table td strong { color: var(--strong); }

.result-panel {
  padding: 22px;
  border: 1px solid #cfe0ff;
  border-radius: 13px;
  background: var(--accent-soft);
}
.result-panel h3 { margin: 0 0 8px; color: var(--strong); font-size: 20px; }
.result-panel p { margin: 0; color: #475467; }
.metric-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 18px; }
.metric { padding: 14px; border-radius: 10px; background: #fff; border: 1px solid #dbe7ff; }
.metric span { display: block; color: var(--light); font-size: 10px; font-weight: 800; letter-spacing: .05em; }
.metric strong { display: block; margin-top: 4px; color: var(--strong); font-size: 15px; }
.metric p { margin-top: 4px; font-size: 12px; color: var(--muted); }

.architecture {
  margin: 0;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}
.architecture figcaption { margin-bottom: 14px; color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.arch-scroll { overflow-x: auto; }
.architecture svg { display: block; width: 100%; min-width: 720px; height: auto; font-family: inherit; }
.architecture .box { fill: #fff; stroke: #d0d5dd; stroke-width: 1.2; }
.architecture .box.accent { fill: var(--accent-soft); stroke: #a9c7f5; }
.architecture .cluster { fill: var(--soft); stroke: #98a2b3; stroke-width: 1.2; stroke-dasharray: 6 5; }
.architecture .platform { fill: #fff; stroke: #d0d5dd; stroke-dasharray: 4 4; }
.architecture .pill { fill: var(--soft); stroke: #d0d5dd; }
.architecture text { fill: var(--muted); font-size: 12px; text-anchor: middle; }
.architecture .title { fill: var(--strong); font-size: 15px; font-weight: 700; }
.architecture .mono { font-size: 11px; }
.architecture .pill-text { fill: var(--strong); font-size: 13px; font-weight: 700; }
.architecture .env { fill: var(--strong); font-size: 13px; font-weight: 700; text-anchor: start; }
.architecture .lane { fill: var(--light); font-size: 11px; font-weight: 800; letter-spacing: .06em; text-anchor: start; }
.architecture .label { fill: var(--accent); font-size: 11px; font-weight: 600; }
.architecture .label.start { text-anchor: start; }
.architecture .flow-line { stroke: var(--accent); stroke-width: 1.6; }
.architecture .flow-line.dashed { stroke-dasharray: 5 4; }
.architecture .arrow-head { fill: var(--accent); }

.architecture.scope { padding: 0 0 18px; border-bottom: 0; }

.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.tag-list li { padding: 4px 12px; border: 1px solid #cfe0ff; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-size: 13px; font-weight: 700; }

.system-arch { margin: 0; padding: 32px 0; border-bottom: 1px solid var(--line); }
.system-arch figcaption { margin-bottom: 14px; color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.system-arch-image { display: block; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.system-arch-image img { display: block; width: 100%; height: auto; }

.issue + .issue { margin-top: 22px; }
.issue h3 { margin: 0 0 6px; color: var(--strong); font-size: 17px; }

.retro-list { display: grid; gap: 12px; }
.retro { padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px; }
.retro .mini-label { display: block; color: var(--light); font-size: 11px; font-weight: 800; letter-spacing: .06em; }
.retro .mini-label.next { margin-top: 10px; color: var(--accent); }
.retro strong { display: block; margin-top: 2px; color: var(--strong); font-size: 16px; }
.retro p { margin: 2px 0 0; color: #475467; font-size: 14px; }

code {
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--soft);
  color: var(--strong);
  font-family: inherit;
  font-size: inherit;
  font-weight: 600;
}

.todo {
  padding: 0 4px;
  border-radius: 4px;
  background: #fef3c7;
  color: #92400e;
  font-weight: 600;
}

.stack-line { color: #475467; font-size: 14px; font-weight: 700; }
.source-note { margin-top: 18px; color: var(--light); font-size: 12px; }

.project-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 0 0;
  color: var(--light);
  font-size: 12px;
}

@media screen and (max-width: 900px) {
  .project-hero { grid-template-columns: 1fr; }
  .section { grid-template-columns: 1fr; gap: 22px; }
  .problem-flow { grid-template-columns: 1fr; }
  .quick-grid, .role-grid, .decision-grid, .result-grid, .signal-grid { grid-template-columns: 1fr; }
  .asis-tobe { grid-template-columns: 1fr; }
  .arrow { transform: rotate(90deg); }
  .flow { grid-template-columns: 1fr; }
  .flow .arrow-inline { transform: rotate(90deg); }
  .metric-list { grid-template-columns: 1fr; }
}

@media screen and (max-width: 620px) {
  .project-document { width: min(100% - 28px, var(--max-width)); padding-top: 30px; }
  .web-header { padding: 12px 14px; }
  .web-header .actions .link-button { display: none; }
  .project-hero h1 { font-size: 38px; }
  .hero-subtitle { font-size: 18px; }
}

@media print {
  @page { size: A4; margin: 13mm 13mm 15mm; }
  body { font-family: Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; font-size: 9.7pt; line-height: 1.55; color: #1f2937; }
  .no-print { display: none !important; }
  .project-document { width: 100%; margin: 0; padding: 0; }
  .project-hero { grid-template-columns: 1fr 280px; gap: 24px; padding: 0 0 20px; }
  .project-hero h1 { font-size: 31pt; }
  .hero-subtitle { font-size: 13pt; margin-top: 10px; }
  .hero-note { font-size: 8.5pt; margin-top: 10px; }
  .meta-row { grid-template-columns: 68px 1fr; gap: 8px; padding: 8px 10px; }
  .meta-row span { font-size: 7.5pt; }
  .meta-row strong { font-size: 8.8pt; }
  .section { grid-template-columns: 130px 1fr; gap: 20px; padding: 20px 0; break-inside: auto; }
  .section-label h2 { font-size: 14pt; }
  .section-body { break-inside: auto; }
  .lead { font-size: 11.5pt; }
  .card, .case-step, .state-box, .result-panel, .metric, .codebox { break-inside: avoid; }
  .quick-grid, .role-grid, .decision-grid, .result-grid, .signal-grid { gap: 8px; }
  .card { padding: 11px; }
  .card strong { font-size: 9.7pt; }
  .card p { font-size: 8.4pt; line-height: 1.55; }
  .problem-flow { gap: 8px; }
  .case-step { min-height: 0; padding: 11px; }
  .case-step strong { font-size: 9.6pt; }
  .case-step p { font-size: 8.3pt; }
  .state-box { padding: 12px; }
  .state-box li { font-size: 8.3pt; margin: 4px 0; }
  .flow .node { min-height: 62px; padding: 6px; font-size: 8pt; }
  .flow .node small { font-size: 6.8pt; }
  .codebox { font-size: 7.2pt; line-height: 1.45; padding: 10px; }
  .bullets li { margin: 5px 0; }
  .evidence-table { font-size: 8.4pt; }
  .evidence-table th, .evidence-table td { padding: 7px 6px; }
  .result-panel { padding: 13px; }
  .result-panel h3 { font-size: 12pt; }
  .metric-list { gap: 7px; }
  .metric { padding: 9px; }
  .metric strong { font-size: 8.8pt; }
  .metric p { font-size: 7.3pt; }
  .architecture { padding: 14px 0; break-inside: avoid; }
  .architecture figcaption { margin-bottom: 8px; font-size: 7.5pt; }
  .architecture svg { min-width: 0; }
  .architecture.scope { padding: 0 0 10px; }
  .tag-list { gap: 5px; }
  .tag-list li { padding: 1px 8px; font-size: 7.8pt; }
  .system-arch { padding: 14px 0; break-inside: avoid; }
  .system-arch figcaption { margin-bottom: 8px; font-size: 7.5pt; }
  .issue { break-inside: avoid; }
  .issue h3 { font-size: 10.5pt; }
  .retro { padding: 10px 12px; break-inside: avoid; }
  .retro .mini-label { font-size: 7pt; }
  .retro strong { font-size: 9.6pt; }
  .retro p { font-size: 8.4pt; }
  .project-footer { padding-top: 12px; font-size: 7.5pt; }
  a { color: inherit; }
}

.combined-project + .combined-project { margin-top: 80px; }
@media print {
  .combined-project + .combined-project { break-before: page; margin-top: 0; }
}

/* Labels for "previous / current structure" groups */
.flow-label,
.group-label { margin: 0 0 10px; color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: .04em; }
.flow-note { margin: 10px 0 0; color: var(--accent); font-size: 13px; font-weight: 700; }
.role-grid + .group-label { margin-top: 22px; }
@media print {
  .flow-label, .group-label { font-size: 7.6pt; margin-bottom: 6px; }
  .flow-note { font-size: 8.2pt; margin-top: 6px; }
  .role-grid + .group-label { margin-top: 12px; }
}