/*
 * CSI White IA R1
 * Public home, project catalog, and shared public-page shell.
 * The scope is deliberately static: no CMS, framework, or private data.
 */
:root {
  --csi-ink: #14213d;
  --csi-ink-2: #263653;
  --csi-muted: #5b6880;
  --csi-line: #dfe5ee;
  --csi-soft: #f5f7fb;
  --csi-soft-blue: #eef4ff;
  --csi-blue: #2156d9;
  --csi-blue-dark: #173e9f;
  --csi-green: #0d8c70;
  --csi-amber: #a86300;
  --csi-white: #ffffff;
  --csi-max: 1180px;
  --csi-shadow: 0 18px 50px rgba(20, 33, 61, 0.08);
  --csi-radius-lg: 28px;
  --csi-radius-md: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body.white-site {
  margin: 0;
  min-width: 320px;
  background: #fff;
  color: var(--csi-ink);
  font-family: "Pretendard Variable", Pretendard, "Noto Sans KR", -apple-system,
    BlinkMacSystemFont, "Segoe UI", "Malgun Gothic", sans-serif;
  font-size: 17px;
  line-height: 1.7;
  word-break: keep-all;
  overflow-wrap: break-word;
  text-rendering: optimizeLegibility;
}
.white-site h1,
.white-site h2,
.white-site h3,
.white-site p { margin: 0; }
.white-site a { color: inherit; text-decoration: none; }
.white-site img { max-width: 100%; display: block; }
.white-site button,
.white-site input { font: inherit; }
.csi-wrap {
  width: min(var(--csi-max), calc(100% - 40px));
  margin: 0 auto;
}
.csi-skip {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 100;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--csi-ink);
  color: #fff;
  transform: translateY(-180%);
}
.csi-skip:focus { transform: none; }

/* Public header */
.csi-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--csi-line);
  backdrop-filter: blur(14px);
}
.csi-nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.csi-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  min-height: 44px;
  font-size: 21px;
  font-weight: 900;
  letter-spacing: -0.03em;
}
.csi-brand span:last-child { color: var(--csi-blue); font-size: 17px; font-weight: 750; }
.csi-menu { display: none; align-items: center; gap: 26px; margin-left: auto; }
.csi-menu a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--csi-ink-2);
  font-size: 15px;
  font-weight: 700;
}
.csi-menu a:hover,
.csi-menu a[aria-current="page"] { color: var(--csi-blue); }
.csi-nav-actions { display: none; align-items: center; gap: 10px; }
.csi-nav-toggle {
  width: 46px;
  height: 46px;
  margin-left: auto;
  border: 1px solid var(--csi-line);
  border-radius: 12px;
  background: #fff;
  color: var(--csi-ink);
  cursor: pointer;
}
.csi-nav-toggle span,
.csi-nav-toggle span::before,
.csi-nav-toggle span::after {
  display: block;
  width: 20px;
  height: 2px;
  margin: auto;
  background: currentColor;
  content: "";
}
.csi-nav-toggle span::before { transform: translateY(-7px); }
.csi-nav-toggle span::after { transform: translateY(5px); }
.csi-drawer {
  display: none;
  border-top: 1px solid var(--csi-line);
  background: #fff;
}
.csi-drawer[data-open="true"] { display: block; }
.csi-drawer .csi-wrap { padding-top: 10px; padding-bottom: 18px; }
.csi-drawer a {
  display: flex;
  min-height: 52px;
  align-items: center;
  border-bottom: 1px solid var(--csi-line);
  font-weight: 750;
}
.csi-drawer .csi-button { margin-top: 14px; width: 100%; }

/* Buttons */
.csi-button {
  min-height: 48px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: none;
  color: var(--csi-ink);
  font-weight: 800;
  cursor: pointer;
}
.csi-button-primary { background: var(--csi-blue); color: #fff; }
.csi-button-primary:hover { background: var(--csi-blue-dark); }
.csi-button-secondary { background: #fff; border-color: var(--csi-line); }
.csi-button-secondary:hover { border-color: var(--csi-blue); color: var(--csi-blue); }

/* Home */
.white-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(72px, 9vw, 124px) 0 clamp(68px, 8vw, 104px);
  background:
    linear-gradient(90deg, rgba(33, 86, 217, 0.045) 1px, transparent 1px) 0 0 / 42px 42px,
    linear-gradient(rgba(33, 86, 217, 0.045) 1px, transparent 1px) 0 0 / 42px 42px,
    #fff;
}
.white-hero-grid {
  display: grid;
  gap: 48px;
  align-items: center;
}
.csi-eyebrow {
  color: var(--csi-blue);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.white-hero h1 {
  margin-top: 18px;
  max-width: 760px;
  font-size: clamp(2.7rem, 7vw, 5.2rem);
  line-height: 1.05;
  letter-spacing: -0.06em;
}
.white-hero h1 span { color: var(--csi-blue); }
.white-hero-lead {
  margin-top: 24px;
  max-width: 660px;
  color: var(--csi-muted);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
  line-height: 1.75;
}
.white-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}
.white-hero-note {
  margin-top: 18px;
  color: var(--csi-muted);
  font-size: 14px;
}
.route-visual {
  display: grid;
  gap: 14px;
  padding: clamp(20px, 4vw, 34px);
  border: 1px solid var(--csi-line);
  border-radius: var(--csi-radius-lg);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--csi-shadow);
}
.route-visual-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--csi-line);
  color: var(--csi-muted);
  font-size: 14px;
  font-weight: 750;
}
.route-step {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  min-height: 76px;
  padding: 14px 16px;
  border: 1px solid var(--csi-line);
  border-radius: 16px;
  background: #fff;
}
.route-step strong { display: block; font-size: 17px; }
.route-step p { color: var(--csi-muted); font-size: 14px; }
.route-no {
  width: 36px;
  height: 36px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: var(--csi-soft-blue);
  color: var(--csi-blue);
  font-weight: 900;
}
.route-arrow { color: var(--csi-blue); font-size: 20px; }

.csi-section { padding: clamp(72px, 9vw, 112px) 0; }
.csi-section-soft { background: var(--csi-soft); }
.csi-section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 34px;
}
.csi-section-head h2 {
  margin-top: 10px;
  font-size: clamp(2rem, 4.5vw, 3.35rem);
  line-height: 1.16;
  letter-spacing: -0.045em;
}
.csi-section-head p {
  max-width: 600px;
  color: var(--csi-muted);
  font-size: 17px;
}
.path-grid,
.project-grid,
.proof-grid {
  display: grid;
  gap: 18px;
}
.path-card,
.project-card,
.proof-card {
  border: 1px solid var(--csi-line);
  border-radius: var(--csi-radius-md);
  background: #fff;
}
.path-card {
  min-height: 240px;
  padding: 28px;
  display: flex;
  flex-direction: column;
}
.path-card .path-no {
  color: var(--csi-blue);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
}
.path-card h3 { margin-top: 28px; font-size: 24px; letter-spacing: -0.03em; }
.path-card p { margin-top: 10px; color: var(--csi-muted); }
.path-card a {
  margin-top: auto;
  padding-top: 24px;
  color: var(--csi-blue);
  font-weight: 850;
}
.project-card {
  position: relative;
  min-height: 280px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 24px rgba(20, 33, 61, 0.04);
}
.project-card:hover { border-color: #b7c8ee; transform: translateY(-2px); }
.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  color: var(--csi-muted);
  font-size: 13px;
  font-weight: 750;
}
.status {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--csi-soft-blue);
  color: var(--csi-blue-dark);
}
.status-live { background: #e8f8f2; color: #08644f; }
.status-hold { background: #f0f2f6; color: #566176; }
.status-verify { background: #fff3df; color: #8a5100; }
.project-card h3 { margin-top: 22px; font-size: 25px; letter-spacing: -0.035em; }
.project-card p { margin-top: 12px; color: var(--csi-muted); }
.project-card .project-go {
  margin-top: auto;
  padding-top: 26px;
  color: var(--csi-blue);
  font-weight: 850;
}
.project-card[hidden] { display: none; }
.proof-card { padding: 26px; }
.proof-card h3 { font-size: 22px; }
.proof-card p { margin-top: 10px; color: var(--csi-muted); }
.proof-card a { display: inline-flex; margin-top: 20px; color: var(--csi-blue); font-weight: 800; }

.about-strip {
  display: grid;
  gap: 24px;
  padding: clamp(34px, 5vw, 58px);
  border-radius: var(--csi-radius-lg);
  background: var(--csi-ink);
  color: #fff;
}
.about-strip h2 { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.045em; }
.about-strip p { max-width: 720px; color: #cbd5e6; }
.about-strip .csi-button-secondary { border-color: #6e7a91; background: transparent; color: #fff; }

/* Catalog */
.catalog-hero {
  padding: clamp(66px, 8vw, 104px) 0 52px;
  border-bottom: 1px solid var(--csi-line);
  background: #fff;
}
.catalog-hero h1 {
  margin-top: 16px;
  max-width: 850px;
  font-size: clamp(2.5rem, 6vw, 4.6rem);
  line-height: 1.08;
  letter-spacing: -0.055em;
}
.catalog-hero p {
  margin-top: 22px;
  max-width: 760px;
  color: var(--csi-muted);
  font-size: 19px;
}
.catalog-controls {
  position: sticky;
  top: 76px;
  z-index: 20;
  border-bottom: 1px solid var(--csi-line);
  background: rgba(255, 255, 255, 0.97);
}
.catalog-control-row {
  min-height: 76px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
}
.catalog-search {
  min-width: min(100%, 260px);
  min-height: 46px;
  flex: 1 1 260px;
  padding: 10px 14px;
  border: 1px solid var(--csi-line);
  border-radius: 12px;
  color: var(--csi-ink);
}
.filter-button {
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid var(--csi-line);
  border-radius: 999px;
  background: #fff;
  color: var(--csi-ink-2);
  font-weight: 800;
  cursor: pointer;
}
.filter-button[aria-pressed="true"] { background: var(--csi-ink); border-color: var(--csi-ink); color: #fff; }
.catalog-group { padding-top: 44px; }
.catalog-group + .catalog-group { padding-top: 72px; }
.catalog-group-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 24px;
}
.catalog-group-head h2 { font-size: clamp(1.8rem, 4vw, 2.7rem); letter-spacing: -0.04em; }
.catalog-group-head p { color: var(--csi-muted); }
.catalog-empty { margin-top: 36px; padding: 24px; border-radius: 16px; background: var(--csi-soft); color: var(--csi-muted); }
.catalog-empty[hidden] { display: none; }
.catalog-count { color: var(--csi-blue); font-weight: 900; }

/* Footer */
.csi-footer {
  margin-top: clamp(72px, 9vw, 116px);
  padding: 52px 0 28px;
  border-top: 1px solid var(--csi-line);
  background: #fff;
}
.csi-footer-grid { display: grid; gap: 34px; }
.csi-footer p { margin-top: 14px; max-width: 520px; color: var(--csi-muted); }
.csi-footer-links { display: grid; gap: 8px; }
.csi-footer-links a,
.csi-footer-links button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border: 0;
  background: none;
  color: var(--csi-ink-2);
  font: inherit;
  cursor: pointer;
  text-align: left;
}
.csi-footer-bottom {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--csi-line);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  color: var(--csi-muted);
  font-size: 14px;
}

/* Existing R1.5 public pages: light shared shell, no content or fact rewrite. */
body:not(.white-site) {
  font-family: "Pretendard Variable", Pretendard, "Noto Sans KR", -apple-system,
    BlinkMacSystemFont, "Segoe UI", "Malgun Gothic", sans-serif;
}
body:not(.white-site) h1 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.24;
  letter-spacing: -0.03em;
}
.r15-nav-inner { height: 76px; }
.r15-wordmark { gap: 6px; font-size: 21px; }
.r15-wordmark .sep { display: none; }
.r15-wordmark .sub { font-size: 17px; font-weight: 750; }
.tw th { font-size: max(12px, 0.75rem); }

.r15-header {
  background: rgba(255, 255, 255, 0.96) !important;
  border-bottom-color: var(--csi-line) !important;
  color: var(--csi-ink-2) !important;
}
.r15-header .r15-wordmark,
.r15-header .r15-nav-links a,
.r15-header .r15-toggle { color: var(--csi-ink) !important; }
.r15-header .r15-wordmark .sep,
.r15-header .r15-wordmark .sub { color: var(--csi-blue) !important; }
.r15-header .r15-toggle { border-color: var(--csi-line) !important; background: #fff !important; }
.r15-header .r15-btn-primary { background: var(--csi-blue) !important; color: #fff !important; }
.r15-drawer {
  background: #fff !important;
  border-top-color: var(--csi-line) !important;
}
.r15-drawer a { color: var(--csi-ink) !important; border-bottom-color: var(--csi-line) !important; }
.r15-related {
  background: var(--csi-soft) !important;
  border-top-color: var(--csi-line) !important;
  color: var(--csi-ink-2) !important;
}
.r15-related-eyebrow,
.r15-related-card .cat,
.r15-related-card .go { color: var(--csi-blue) !important; }
.r15-related h2,
.r15-related-card .name { color: var(--csi-ink) !important; }
.r15-related-lead,
.r15-related-card .why { color: var(--csi-muted) !important; }
.r15-related-card {
  background: #fff !important;
  border-color: var(--csi-line) !important;
  color: var(--csi-ink-2) !important;
  box-shadow: 0 8px 24px rgba(20, 33, 61, 0.04);
}
.r15-footer {
  background: #fff !important;
  border-top-color: var(--csi-line) !important;
  color: var(--csi-muted) !important;
}
.r15-footer .r15-wordmark,
.r15-footer .r15-footer-col-title { color: var(--csi-ink) !important; }
.r15-footer .r15-wordmark .sep,
.r15-footer .r15-wordmark .sub { color: var(--csi-blue) !important; }
.r15-footer-note,
.r15-footer-col a,
.r15-footer-col button.r15-as-link,
.r15-footer-bottom,
.r15-footer-bottom a { color: var(--csi-muted) !important; }
.r15-footer-legal,
.r15-footer-bottom { border-top-color: var(--csi-line) !important; }

@media (min-width: 760px) {
  .path-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .path-grid-two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .project-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .proof-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .csi-footer-grid { grid-template-columns: minmax(0, 1.5fr) minmax(260px, 0.7fr); }
}
@media (min-width: 980px) {
  .csi-menu,
  .csi-nav-actions { display: flex; }
  .csi-nav-toggle { display: none; }
  .csi-drawer { display: none !important; }
  .white-hero-grid { grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.72fr); }
  .project-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .proof-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .csi-wrap { width: min(100% - 28px, var(--csi-max)); }
  .white-hero { padding-top: 56px; }
  .white-hero-actions .csi-button { width: 100%; }
  .route-step { grid-template-columns: 36px minmax(0, 1fr); }
  .route-arrow { display: none; }
  .catalog-controls { top: 68px; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}