/* home.css - 첫 화면(index.html) 전용
 * 토큰은 style.css :root를 쓴다. 이 파일에는 새 색을 만들지 않는다.
 * 구성: 회사 소개 → UPFLOW OS(Fig 1) → 진행 방식(Fig 2~4) → 비교 → 단계별 상세
 *       → 설계 원칙 → 후기 → 실적 → 자주 묻는 질문 → 신청 → 바닥글
 */

/* ======================================================== */
/* 0. 공통 틀                                                */
/* ======================================================== */
.home section {
  padding: var(--upf-space-9) 0;
}

/* 한국어 줄바꿈: 단어 중간에서 끊지 않음 */
.home {
  word-break: keep-all;
  overflow-wrap: break-word;
}

.wrap {
  width: 100%;
  max-width: calc(var(--page-max-width) + 2 * var(--page-padding-inline));
  margin: 0 auto;
  padding: 0 var(--page-padding-inline);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 200;
  background: var(--bg-0);
  color: var(--fg-1);
  padding: var(--upf-space-2) var(--upf-space-4);
}
.skip-link:focus { left: 8px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* 라벨: 12px, 0.14em, 대문자 (브랜드 규칙) */
.label,
.sub-label,
.fig-label,
.panel-kicker,
.os-col-label,
.rule-label {
  font-family: var(--font-display);
  font-size: 12px;
  line-height: 16px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.label { margin-bottom: var(--upf-space-4); }
.sub-label { margin-bottom: var(--upf-space-4); }

/* 섹션 제목: 남색 핵심어 + 보조색 둘째 줄
 * #main을 붙여 style.css의 #process h2 규칙보다 앞서게 한다 */
#main .h2 {
  font-family: var(--font-text);
  font-size: 40px;
  line-height: 50px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--fg-1);
  max-width: 820px;
  margin-bottom: var(--upf-space-7);
}
#main .h2 .muted { color: var(--fg-2); }

.lead {
  font-size: 18px;
  line-height: 30px;
  color: var(--fg-2);
  max-width: 680px;
  margin: calc(-1 * var(--upf-space-5)) 0 var(--upf-space-7);
}

/* 버튼 */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--upf-space-3);
}
.btn {
  display: inline-flex;
  align-items: center;
  height: 48px;
  padding: 0 var(--upf-space-5);
  border-radius: var(--upf-radius-control);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  transition: background var(--speed-quick) linear, border-color var(--speed-quick) linear;
}
.btn-primary { background: var(--accent); color: var(--upf-color-paper); }
.btn-primary:hover { background: #1A4EAB; } /* Signal Blue 눌림 단계: 가이드 개정 시 등록 필요 */
.btn-light { background: var(--upf-color-paper); color: var(--fg-1); }
.btn-light:hover { background: var(--upf-color-navy-100); }
.btn-ghost-light {
  color: var(--on-navy-1);
  border: 1px solid var(--on-navy-line);
}
.btn-ghost-light:hover { border-color: var(--on-navy-2); }

/* 섹션 구분선: 본문 폭에 맞춤 */
.home section + section::before {
  left: max(var(--page-padding-inline), calc((100% - var(--page-max-width)) / 2));
  right: max(var(--page-padding-inline), calc((100% - var(--page-max-width)) / 2));
}

/* style.css의 상세 쪽용 #process 여백을 지운다 */
.home #process {
  max-width: none;
  padding: var(--upf-space-9) 0 0;
}

/* 남색 면 */
.surface-navy {
  background: var(--upf-color-navy-900);
  color: var(--on-navy-1);
}
.surface-navy .label { color: var(--on-navy-3); }
.home section.surface-navy::before,
.home section.surface-navy + section::before { display: none; }

/* ======================================================== */
/* 1. 머리 메뉴 (첫 화면 위에서는 투명)                       */
/* ======================================================== */
body.at-top #main-nav:not(.scrolled) {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
body.at-top #main-nav .nav-links a { color: var(--on-navy-2); }
body.at-top #main-nav .nav-links a:hover { color: var(--on-navy-1); }
body.at-top #main-nav .hamburger span { background: var(--on-navy-1); }
body.at-top #main-nav.scrolled { background: rgba(12, 30, 51, 0.85); border-bottom-color: var(--on-navy-line); }

.hamburger {
  background: none;
  border: 0;
}

/* ======================================================== */
/* 2. 회사 소개                                              */
/* ======================================================== */
#hero {
  padding-top: calc(var(--header-height) + var(--upf-space-9));
  padding-bottom: 0;
  overflow: hidden;
}
.hero-h1 {
  font-family: var(--font-text);
  font-size: 56px;
  line-height: 68px;
  font-weight: 600;
  letter-spacing: -0.025em;
  max-width: 900px;
  margin-bottom: var(--upf-space-5);
}
.hero-sub {
  font-size: 18px;
  line-height: 30px;
  color: var(--on-navy-2);
  max-width: 640px;
  margin-bottom: var(--upf-space-6);
}

/* ======================================================== */
/* 3. 예시 화면 (앱 창)                                      */
/* ======================================================== */
.app-window {
  background: var(--bg-0);
  color: var(--fg-1);
  border: 1px solid var(--line-1);
  font-size: 13px;
  line-height: 20px;
}
.app-bar {
  display: flex;
  align-items: center;
  gap: var(--upf-space-4);
  height: 40px;
  padding: 0 var(--upf-space-4);
  border-bottom: 1px solid var(--line-1);
  background: var(--bg-1);
}
.app-name { font-weight: 600; }
.app-path { color: var(--fg-2); }
.app-user { margin-left: auto; color: var(--fg-3); }

.hero-window {
  margin-top: var(--upf-space-8);
  border-color: var(--upf-color-navy-700);
  border-bottom: 0;
}
.hero-window figcaption {
  position: absolute;
  right: var(--upf-space-4);
  bottom: var(--upf-space-3);
  font-size: 12px;
  color: var(--fg-3);
}
.hero-window { position: relative; }

.app-body {
  display: grid;
  grid-template-columns: 140px 1fr 280px;
  min-height: 300px;
}
.app-side {
  list-style: none;
  border-right: 1px solid var(--line-1);
  padding: var(--upf-space-3) 0;
}
.app-side li {
  padding: var(--upf-space-1) var(--upf-space-4);
  color: var(--fg-2);
}
.app-side li.on {
  color: var(--fg-1);
  font-weight: 600;
  box-shadow: inset 2px 0 0 var(--accent);
}
.app-main { overflow-x: auto; }

.app-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.app-table th {
  text-align: left;
  font-weight: 500;
  color: var(--fg-3);
  padding: var(--upf-space-2) var(--upf-space-4);
  border-bottom: 1px solid var(--line-1);
  white-space: nowrap;
}
.app-table td {
  padding: var(--upf-space-2) var(--upf-space-4);
  border-bottom: 1px solid var(--upf-color-navy-200);
  white-space: nowrap;
}
.app-table .num { text-align: right; font-variant-numeric: tabular-nums; }
.app-table tr.hl td { background: var(--bg-1); }
.app-table .no { color: var(--fg-3); }

.tag {
  display: inline-block;
  font-size: 12px;
  line-height: 18px;
  padding: 0 var(--upf-space-2);
  border: 1px solid var(--line-1);
  border-radius: var(--upf-radius-control);
  color: var(--fg-2);
}
.tag-accent { border-color: var(--accent); color: var(--accent); }

.app-panel {
  border-left: 1px solid var(--line-1);
  padding: var(--upf-space-4);
}
.panel-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: var(--upf-space-2);
}
.panel-text { font-size: 14px; line-height: 22px; margin-bottom: var(--upf-space-2); }
.panel-text.dark { font-weight: 600; }
.panel-ref { font-size: 12px; color: var(--fg-2); margin-bottom: var(--upf-space-4); }
.panel-actions { display: flex; gap: var(--upf-space-2); }
.mini-btn {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 var(--upf-space-3);
  border: 1px solid var(--line-1);
  border-radius: var(--upf-radius-control);
  font-size: 12px;
  font-weight: 500;
}
.mini-btn-primary { background: var(--accent); border-color: var(--accent); color: var(--upf-color-paper); }

.app-window.small { width: 100%; }
.app-window .cap,
.fig figcaption {
  font-size: 12px;
  color: var(--fg-3);
  padding: var(--upf-space-2) var(--upf-space-4);
  border-top: 1px solid var(--line-1);
}
.fig figcaption { border-top: 0; padding-left: 0; }

/* ======================================================== */
/* 4. UPFLOW OS (Fig 1)                                     */
/* ======================================================== */
.os-diagram {
  display: grid;
  grid-template-columns: 1fr 1.6fr 1fr;
  gap: var(--upf-space-7);
  align-items: center;
  padding: var(--upf-space-7);
  border: 1px solid var(--line-1);
  position: relative;
}
.os-col {
  display: flex;
  flex-direction: column;
  gap: var(--upf-space-2);
  position: relative;
}
.os-col-label { margin-bottom: var(--upf-space-2); }
.chip {
  display: block;
  padding: var(--upf-space-2) var(--upf-space-3);
  border: 1px solid var(--line-1);
  font-size: 14px;
  color: var(--fg-2);
  background: var(--bg-0);
}
/* 연결선: 입구 → 코어 → 확장 */
.os-in::after,
.os-out::before {
  content: '';
  position: absolute;
  top: 50%;
  width: var(--upf-space-7);
  height: 1px;
  background: var(--fg-1);
}
.os-in::after { right: calc(-1 * var(--upf-space-7)); }
.os-out::before { left: calc(-1 * var(--upf-space-7)); }

.os-core {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--fg-1);
  background: var(--bg-0);
}
.os-core .os-col-label {
  padding: var(--upf-space-3) var(--upf-space-4) 0;
}
.layer {
  display: grid;
  grid-template-columns: 28px 64px 1fr;
  align-items: baseline;
  gap: var(--upf-space-2);
  width: 100%;
  text-align: left;
  font: inherit;
  color: var(--fg-2);
  background: none;
  border: 0;
  border-top: 1px solid var(--line-1);
  padding: var(--upf-space-4);
  cursor: pointer;
  transition: background var(--speed-quick) linear, color var(--speed-quick) linear;
}
.os-core .os-col-label + .layer { border-top: 0; margin-top: var(--upf-space-2); }
.layer:hover { background: var(--bg-1); color: var(--fg-1); }
.layer[aria-selected="true"] {
  color: var(--fg-1);
  background: var(--bg-1);
  box-shadow: inset 2px 0 0 var(--accent);
}
.layer-no {
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--fg-3);
}
.layer-name { font-size: 17px; font-weight: 600; }
.layer-desc { font-size: 14px; }
.layer:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.os-panels { margin-top: var(--upf-space-6); }
.os-panel {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--upf-space-8);
  align-items: start;
  animation: panel-in 0.15s linear;
}
.os-panel[hidden] { display: none; }
@keyframes panel-in { from { opacity: 0; } to { opacity: 1; } }

.panel-copy { padding-top: var(--upf-space-5); }
.panel-copy h3,
.stage-copy h3 {
  font-size: 24px;
  line-height: 34px;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: var(--upf-space-3) 0 var(--upf-space-4);
}
.panel-copy p:not(.panel-kicker),
.stage-copy p:not(.stage-no) {
  color: var(--fg-2);
  max-width: 480px;
}
.panel-kicker { color: var(--accent); }

/* 패널 속 예시 화면 */
.record { padding: var(--upf-space-4); }
.record-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--upf-space-3) var(--upf-space-5);
  margin-bottom: var(--upf-space-5);
}
.record-grid dt { font-size: 12px; color: var(--fg-3); }
.record-grid dd { font-weight: 500; }
.record-sub { font-size: 12px; color: var(--fg-3); margin-bottom: var(--upf-space-2); }
.links { list-style: none; border-top: 1px solid var(--line-1); }
.links li {
  display: flex;
  justify-content: space-between;
  padding: var(--upf-space-2) 0;
  border-bottom: 1px solid var(--upf-color-navy-200);
}
.links b { font-weight: 600; }

.rule { padding: var(--upf-space-4); }
.rule .rule-label { font-size: 11px; margin-bottom: var(--upf-space-1); }
.rule-text {
  font-size: 15px;
  line-height: 24px;
  font-weight: 500;
  margin-bottom: var(--upf-space-4);
}
.rule-text del { color: var(--fg-3); }
.rule-text ins { text-decoration: none; color: var(--accent); box-shadow: inset 0 -1px 0 var(--accent); }
.rule-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  line-height: 20px;
  background: var(--bg-1);
  border: 1px solid var(--line-1);
  padding: var(--upf-space-3);
  margin-bottom: var(--upf-space-4);
  white-space: pre-wrap;
}
.rule-stat { font-weight: 600; }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--line-1);
}
.split-col { padding: var(--upf-space-4); }
.split-col .rule-label { font-size: 11px; margin-bottom: var(--upf-space-2); }
.split-human { border-left: 1px solid var(--accent); }

.log { list-style: none; padding: var(--upf-space-2) var(--upf-space-4); }
.log li {
  padding: var(--upf-space-1) 0;
  color: var(--fg-2);
  font-size: 12px;
}
.log span {
  display: inline-block;
  width: 48px;
  color: var(--fg-3);
  font-variant-numeric: tabular-nums;
}

.perm td:first-child { font-weight: 500; }

/* ======================================================== */
/* 5. 진행 방식 (Fig 2~4)                                    */
/* ======================================================== */
#process { padding-bottom: 0; }
.stage {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--upf-space-8);
  align-items: center;
  padding-top: var(--upf-space-8);
  padding-bottom: var(--upf-space-8);
  position: relative;
}
/* 단계 사이 구분선: .wrap 안쪽 여백만큼 띄움 */
.stage::before {
  content: '';
  position: absolute;
  top: 0;
  left: var(--page-padding-inline);
  right: var(--page-padding-inline);
  height: 1px;
  background: var(--line-1);
}
.stage-no {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.note {
  margin-top: var(--upf-space-4);
  font-size: 13px;
  line-height: 20px;
  color: var(--fg-3) !important;
}

.fig { margin: 0; }
.fig-label { margin-bottom: var(--upf-space-3); }

/* Fig 2: 선 그림 */
.draw-svg {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--line-1);
  padding: var(--upf-space-5);
  background: var(--bg-0);
  overflow: visible;
}
.draw-svg text {
  font-family: var(--font-text);
  font-size: 14px;
  fill: var(--fg-1);
}
.draw-svg text.dim { fill: var(--fg-3); font-size: 13px; }
.draw-svg text.map-title { font-weight: 600; }
.draw-svg .nodes rect,
.draw-svg .map-box {
  fill: var(--bg-0);
  stroke: var(--line-2);
  stroke-width: 1;
}
.draw-svg .map-box { stroke: var(--fg-1); }
.draw-svg line { stroke: var(--line-1); }
.draw-svg .draw {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.5;
  stroke-dasharray: 260;
  stroke-dashoffset: 260;
  transition: stroke-dashoffset 1.2s var(--ease-out-quart);
}
.stage.visible .draw { stroke-dashoffset: 0; }
.stage.visible .draw:nth-child(2) { transition-delay: 0.1s; }
.stage.visible .draw:nth-child(3) { transition-delay: 0.2s; }
.stage.visible .draw:nth-child(4) { transition-delay: 0.3s; }

/* Fig 3: 전환 현황 */
.status-list { list-style: none; padding: var(--upf-space-2) var(--upf-space-4); }
.status-list li {
  display: grid;
  grid-template-columns: 88px 1fr 72px;
  align-items: center;
  gap: var(--upf-space-4);
  padding: var(--upf-space-3) 0;
  border-bottom: 1px solid var(--upf-color-navy-200);
}
.status-list li:last-child { border-bottom: 0; }
.status-list .tag { text-align: center; }
.bar { height: 4px; background: var(--upf-color-navy-200); position: relative; }
.bar i {
  position: absolute;
  inset: 0 auto 0 0;
  background: var(--fg-1);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 1s var(--ease-out-quart);
}
.stage.visible .bar i { transform: scaleX(1); }

/* Fig 4: 막대 그래프 */
.chart { padding: 0 var(--upf-space-4) var(--upf-space-4); }
.chart .rule-label { font-size: 11px; margin-bottom: var(--upf-space-3); }
.bars {
  display: flex;
  align-items: flex-end;
  gap: var(--upf-space-2);
  height: 120px;
  border-bottom: 1px solid var(--fg-1);
}
.bars span {
  flex: 1;
  height: var(--h);
  background: var(--upf-color-navy-300);
  position: relative;
  transform-origin: bottom;
  transform: scaleY(0);
  transition: transform 0.8s var(--ease-out-quart);
}
.bars span:last-child { background: var(--accent); }
.bars em {
  position: absolute;
  top: -18px;
  left: 0;
  right: 0;
  text-align: center;
  font-style: normal;
  font-size: 11px;
  color: var(--fg-3);
}
.stage.visible .bars span { transform: scaleY(1); }
.bars-axis {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--fg-3);
  margin-top: var(--upf-space-1);
}

/* ======================================================== */
/* 6. 비교, 단계별 상세                                       */
/* ======================================================== */
.reasons {
  list-style: none;
  counter-reset: r;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--fg-1);
  margin-bottom: var(--upf-space-8);
}
.reasons li {
  counter-increment: r;
  padding: var(--upf-space-5) var(--upf-space-5) 0 0;
  color: var(--fg-2);
}
.reasons li::before {
  content: '0' counter(r);
  display: block;
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--fg-3);
  margin-bottom: var(--upf-space-2);
}
.reasons b { display: block; color: var(--fg-1); font-weight: 600; margin-bottom: var(--upf-space-1); }

.table-scroll { overflow-x: auto; }
.compare {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 24px;
}
.compare th,
.compare td {
  text-align: left;
  vertical-align: top;
  padding: var(--upf-space-4);
  border-bottom: 1px solid var(--line-1);
}
.compare thead th {
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-3);
  border-bottom-color: var(--fg-1);
}
.compare tbody th { font-weight: 600; width: 18%; }
.compare td { color: var(--fg-2); }
.compare .ours {
  color: var(--fg-1);
  font-weight: 500;
  background: var(--bg-1);
}
.compare thead .ours { color: var(--accent); font-weight: 600; }
.steps-table tbody th .stage-no { display: block; margin-bottom: var(--upf-space-1); }
.steps-table td { color: var(--fg-1); }

/* ======================================================== */
/* 7. 설계 원칙                                              */
/* ======================================================== */
#principles { background: var(--bg-1); }
#principles::before { display: none; }
.principles {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--fg-1);
}
.principles li {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--upf-space-4);
  padding: var(--upf-space-6) var(--upf-space-6) var(--upf-space-6) 0;
  border-bottom: 1px solid var(--line-1);
}
.principles li:nth-child(even) { padding-left: var(--upf-space-6); border-left: 1px solid var(--line-1); }
.p-no {
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--accent);
  padding-top: 4px;
}
.principles h3 { font-size: 18px; line-height: 28px; font-weight: 600; margin-bottom: var(--upf-space-2); }
.principles p { color: var(--fg-2); }
#principles + section::before { display: none; }

/* ======================================================== */
/* 8. 후기                                                   */
/* ======================================================== */
.review-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--upf-space-3);
}
.review {
  margin: 0;
  min-height: 360px;
  padding: var(--upf-space-6);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line-1);
  background: var(--bg-1);
}
.review blockquote {
  font-size: 28px;
  line-height: 38px;
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--fg-1);
}
.review figcaption {
  display: flex;
  flex-direction: column;
  padding-left: var(--upf-space-4);
  border-left: 1px solid var(--line-1);
  font-size: 14px;
  line-height: 22px;
}
.review figcaption b { font-weight: 600; }
.review figcaption span { color: var(--fg-2); }
.review-navy { background: var(--upf-color-navy-900); border-color: var(--upf-color-navy-900); }
.review-navy blockquote { color: var(--on-navy-1); }
.review-navy figcaption { border-left-color: var(--on-navy-line); color: var(--on-navy-1); }
.review-navy figcaption span { color: var(--on-navy-2); }

/* ======================================================== */
/* 9. 실적                                                   */
/* ======================================================== */
.company-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--upf-space-8);
}
.partner-row {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line-1);
  border-left: 1px solid var(--line-1);
}
.partner {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 112px;
  border-right: 1px solid var(--line-1);
  border-bottom: 1px solid var(--line-1);
  font-size: 18px;
  font-weight: 600;
  color: var(--fg-2);
}
.partner img { max-height: 32px; max-width: 70%; filter: grayscale(1); opacity: 0.8; }

.timeline { list-style: none; border-top: 1px solid var(--fg-1); }
.timeline li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: var(--upf-space-4);
  padding: var(--upf-space-4) 0;
  border-bottom: 1px solid var(--line-1);
}
.timeline time {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--fg-3);
  font-variant-numeric: tabular-nums;
}

/* ======================================================== */
/* 10. 자주 묻는 질문                                        */
/* ======================================================== */
.faq-list { border-top: 1px solid var(--fg-1); max-width: 880px; }
.faq-list details { border-bottom: 1px solid var(--line-1); }
.faq-list summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--upf-space-4);
  padding: var(--upf-space-5) 0;
  font-size: 18px;
  line-height: 28px;
  font-weight: 500;
  cursor: pointer;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::before {
  content: '';
  flex: none;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--fg-1);
  border-bottom: 1.5px solid var(--fg-1);
  transform: rotate(-45deg);
  transition: transform var(--speed-regular) var(--ease-out-quart);
}
.faq-list details[open] summary::before { transform: rotate(45deg); }
.faq-list summary:hover { color: var(--accent); }
.faq-list summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.faq-list details p {
  padding: 0 0 var(--upf-space-5) calc(8px + var(--upf-space-4) + 4px);
  color: var(--fg-2);
  max-width: 760px;
}

/* ======================================================== */
/* 11. 신청, 바닥글                                          */
/* ======================================================== */
.home #contact {
  min-height: 0;
  padding: var(--upf-space-9) 0;
  display: block;
}
.cta-final {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--upf-space-6);
}
.cta-h2 {
  font-size: 56px;
  line-height: 68px;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--on-navy-1);
}
.cta-h2 span {
  display: block;
  margin-top: var(--upf-space-3);
  font-size: 20px;
  line-height: 30px;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--on-navy-2);
}
.cta-final .btn-row { justify-content: center; }

.home .site-footer {
  padding: var(--upf-space-8) 0 0;
  overflow: hidden;
}
.footer-top {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--upf-space-7);
  padding-bottom: var(--upf-space-7);
  border-bottom: 1px solid var(--on-navy-line);
}
.footer-brand img { height: 18px; width: auto; display: block; }
.sitemap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--upf-space-5);
}
.sitemap p {
  font-size: 13px;
  font-weight: 600;
  color: var(--on-navy-1);
  margin-bottom: var(--upf-space-3);
}
.sitemap a {
  display: block;
  font-size: 14px;
  line-height: 28px;
  color: var(--on-navy-3);
  text-decoration: none;
  overflow-wrap: anywhere;
}
.sitemap a:hover { color: var(--on-navy-1); }
.home .footer-info { padding: var(--upf-space-5) 0; }
.footer-wordmark {
  display: block;
  width: 100%;
  height: auto;
  opacity: 0.08;
  margin-bottom: -2%;
}

/* ======================================================== */
/* 12. 반응형                                                */
/* ======================================================== */
@media (max-width: 1024px) {
  .app-body { grid-template-columns: 1fr 240px; }
  .app-side { display: none; }
}

@media (max-width: 900px) {
  .home section { padding: var(--upf-space-8) 0; }
  .hero-h1, .cta-h2 { font-size: 36px; line-height: 46px; }
  #main .h2 { font-size: 30px; line-height: 40px; }

  .app-body { grid-template-columns: 1fr; }
  .app-panel { border-left: 0; border-top: 1px solid var(--line-1); }

  .os-diagram { grid-template-columns: 1fr; gap: var(--upf-space-5); padding: var(--upf-space-5); }
  .os-col { flex-direction: row; flex-wrap: wrap; }
  .os-col-label { width: 100%; }
  .os-in::after, .os-out::before { display: none; }
  .os-panel, .stage, .company-grid, .footer-top { grid-template-columns: 1fr; gap: var(--upf-space-6); }
  .panel-copy { padding-top: 0; }

  .reasons { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
  .principles li:nth-child(even) { padding-left: 0; border-left: 0; }
  .review-grid { grid-template-columns: 1fr; }
  .review { min-height: 240px; }
  .review blockquote { font-size: 22px; line-height: 32px; }
  .sitemap { grid-template-columns: 1fr 1fr; }

  body.at-top .nav-links.mobile-active { background: var(--upf-color-navy-900); border-bottom-color: var(--on-navy-line); }
}

@media (max-width: 480px) {
  .hero-h1, .cta-h2 { font-size: 30px; line-height: 40px; }
  .layer { grid-template-columns: 20px 52px 1fr; padding: var(--upf-space-3); }
  .layer-desc { font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  .draw-svg .draw { stroke-dashoffset: 0; transition: none; }
  .bar i, .bars span { transform: none; transition: none; }
  .os-panel { animation: none; }
}