/*
 * ============================================================
 * CoreLabs — 공통 디자인 시스템  (main.css)
 * ============================================================
 *
 * 주요 컴포넌트 클래스 목록 (다른 에이전트 참조용)
 * ----------------------------------------------------------------
 * [레이아웃]
 *   .container               — 최대폭 1140px, 수평 중앙
 *   .grid-2 / .grid-3        — 2/3컬럼 그리드 (gap 2rem)
 *   .section                 — 섹션 공통 패딩 (120px / 모바일 72px)
 *   .section--dark           — --ink 배경 다크 섹션
 *
 * [GNB]
 *   .gnb                     — 고정 상단 내비게이션 바
 *   .gnb__logo               — 로고 영역
 *   .gnb__nav                — 데스크톱 메뉴 ul
 *   .gnb__hamburger          — 모바일 햄버거 버튼
 *   .mobile-menu             — 모바일 풀스크린 메뉴 오버레이
 *   .mobile-menu--open       — 열림 상태
 *
 * [eyebrow / 헤드라인]
 *   .eyebrow                 — 섹션 상단 모노 라벨 (JetBrains Mono, uppercase)
 *   .section-headline        — 섹션 메인 타이틀 (weight 800)
 *   .section-lead            — 섹션 리드 문장
 *
 * [카드]
 *   .card                    — 기본 카드 (보더, 8px 라운드)
 *   .card--project           — 프로젝트 카드 (기둥 행 내부)
 *   .card--code              — 다크 코드 카드 (--code-bg)
 *   .card--pillar            — 기둥(What We Build) 행 래퍼
 *   .card--client            — Track Record 고객사 텍스트 카드
 *   .card--principle         — How We Build 원칙 카드
 *   .card--position          — Join Us 포지션 미니 카드
 *
 * [칩 / 배지]
 *   .chip                    — 기술 스택 칩
 *   .badge                   — 상태 배지 베이스
 *   .badge--running          — RUNNING / 운영 중 (--live-green)
 *   .badge--recruiting       — 모집 중
 *
 * [버튼]
 *   .btn                     — 버튼 베이스
 *   .btn--primary            — solid --core-blue
 *   .btn--ghost              — 보더 only
 *
 * [브라우저 프레임 목업]
 *   .browser-frame           — 브라우저 목업 래퍼
 *   .browser-frame__bar      — 상단 크롬 바 (3점 + 주소창)
 *   .browser-frame__screen   — 스크린 영역
 *
 * [상태판 (히어로 우측)]
 *   .status-board            — 운영 시스템 상태판 래퍼
 *   .status-board__row       — 시스템 한 행
 *   .status-board__dot       — 녹색 점 (--live-green)
 *
 * [스택 배지 행]
 *   .stack-row               — 기술 스택 가로 스크롤 행
 *   .stack-tag               — 스택 배지 개별 항목
 *
 * [푸터]
 *   .footer                  — 푸터 영역
 *   .footer__inner           — 내부 컨테이너
 *   .footer__info            — 사업자 정보 블록
 *
 * [유틸]
 *   .fade-up                 — IntersectionObserver fade-up 초기 상태
 *   .fade-up--visible        — 진입 후 표시 상태
 *
 * 브레이크포인트: 1140px / 768px / 480px
 * ============================================================
 */

/* ─── 0. 폰트 ──────────────────────────────────────────────── */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable.min.css');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&display=swap');
/* font-display: swap — JetBrains Mono URL 파라미터로 적용, Pretendard CDN도 swap 기본값 */

/* ─── 1. 디자인 토큰 ───────────────────────────────────────── */
:root {
  --ink:        #16181D;
  --paper:      #FCFCFA;
  --line:       #E4E4DE;
  --core-blue:  #1E6FD9;
  --live-green: #0E9F6E;
  --code-bg:    #1C1E26;
  --muted:      #6B6F76;

  --font-sans:  'Pretendard Variable', 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-mono:  'JetBrains Mono', 'Courier New', monospace;

  --radius:     8px;
  --max-width:  1140px;

  /* 타입 스케일 */
  --text-64: clamp(2.25rem, 5vw, 4rem);      /* 히어로 H1 */
  --text-40: clamp(1.75rem, 3.5vw, 2.5rem);  /* 섹션 헤드라인 */
  --text-28: clamp(1.25rem, 2.5vw, 1.75rem); /* 서브헤드 */
  --text-20: 1.25rem;
  --text-17: 1.0625rem;
  --text-14: 0.875rem;
  --text-13: 0.8125rem;
}

/* ─── 2. 리셋 & 베이스 ─────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-17);
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
  word-break: keep-all;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--core-blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--core-blue);
  outline-offset: 3px;
  border-radius: var(--radius);
}

/* ─── 3. 레이아웃 ──────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 2rem;
}

.section {
  padding-block: 120px;
}

.section--dark {
  background: var(--ink);
  color: var(--paper);
}

.section--dark .eyebrow {
  color: rgba(252, 252, 250, 0.5);
}

.section--dark .section-headline,
.section--dark .section-lead {
  color: var(--paper);
}

.section--dark .section-lead {
  color: rgba(252, 252, 250, 0.7);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

/* ─── 4. GNB ────────────────────────────────────────────────── */
.gnb {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 900;
  background: rgba(252, 252, 250, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.2s;
}

.gnb.scrolled {
  box-shadow: 0 2px 16px rgba(22, 24, 29, 0.08);
}

.gnb__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.gnb__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.gnb__logo-img {
  height: 28px;
  width: auto;
}

.gnb__logo-text {
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.gnb__nav {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.gnb__nav a {
  font-size: var(--text-14);
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
  transition: color 0.15s;
  position: relative;
}

.gnb__nav a::after {
  content: '';
  position: absolute;
  inset-block-end: -4px;
  inset-inline: 0;
  height: 2px;
  background: var(--core-blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s;
}

.gnb__nav a:hover {
  color: var(--core-blue);
  text-decoration: none;
}

.gnb__nav a:hover::after {
  transform: scaleX(1);
}

.gnb__nav a.is-active,
.gnb__nav a[aria-current="page"] {
  color: var(--core-blue);
  font-weight: 600;
}

.gnb__nav a.is-active::after,
.gnb__nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.gnb__nav a.nav--cta {
  background: var(--core-blue);
  color: #fff;
  padding: 6px 14px;
  border-radius: var(--radius);
  font-weight: 600;
}

.gnb__nav a.nav--cta:hover {
  background: #1558b0;
  color: #fff;
}

.gnb__nav a.nav--cta::after {
  display: none;
}

/* 햄버거 */
.gnb__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius);
  transition: background 0.15s;
}

.gnb__hamburger:hover {
  background: rgba(22, 24, 29, 0.06);
}

.gnb__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
  transform-origin: center;
}

.gnb__hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.gnb__hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.gnb__hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 모바일 메뉴 */
.mobile-menu {
  display: none;
  position: fixed;
  inset-block-start: 64px;
  inset-inline: 0;
  inset-block-end: 0;
  background: var(--paper);
  z-index: 800;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu--open {
  transform: translateX(0);
}

.mobile-menu__list {
  list-style: none;
  padding: 1.5rem 2rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.mobile-menu__list a {
  display: block;
  padding: 1rem 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 0.15s;
}

.mobile-menu__list a.is-active,
.mobile-menu__list a[aria-current="page"] {
  color: var(--core-blue);
}

.mobile-menu__list a:hover {
  color: var(--core-blue);
}

/* ─── 5. eyebrow / 헤드라인 ─────────────────────────────────── */
.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-13);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-block-end: 1rem;
}

.section-headline {
  font-size: var(--text-40);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink);
  margin-block-end: 1.25rem;
}

.section-lead {
  font-size: var(--text-17);
  color: var(--muted);
  max-width: 52ch;
  line-height: 1.7;
  margin-block-end: 3rem;
}

/* ─── 6. 카드 ──────────────────────────────────────────────── */
/* 기본 카드 */
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.card:hover {
  border-color: var(--core-blue);
  box-shadow: 0 4px 20px rgba(30, 111, 217, 0.08);
}

/* 프로젝트 카드 */
.card--project {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  text-decoration: none;
  color: inherit;
}

.card--project:hover {
  border-color: var(--core-blue);
  box-shadow: 0 6px 24px rgba(30, 111, 217, 0.1);
  text-decoration: none;
}

.card--project__title {
  font-size: var(--text-20);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.card--project__desc {
  font-size: var(--text-14);
  color: var(--muted);
  line-height: 1.7;
  flex: 1;
}

.card--project__metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.card--project__metric {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--core-blue);
  background: rgba(30, 111, 217, 0.07);
  padding: 3px 8px;
  border-radius: 4px;
}

.card--project__link {
  font-size: var(--text-13);
  font-weight: 600;
  color: var(--core-blue);
  margin-block-start: 0.25rem;
}

/* 코드 카드 */
.card--code {
  background: var(--code-bg);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: #C9D1D9;
  overflow-x: auto;
  white-space: pre;
  line-height: 1.6;
  border: 1px solid rgba(255,255,255,0.06);
  /* grid item 내 코드 폭이 부모를 밀지 않도록 */
  min-width: 0;
  max-width: 100%;
}

/* 기둥 래퍼 */
.card--pillar {
  border-block-start: 1px solid var(--line);
  padding-block: 3rem;
}

.card--pillar:first-child {
  border-block-start: none;
  padding-block-start: 0;
}

.card--pillar__label {
  font-size: var(--text-14);
  font-weight: 600;
  color: var(--muted);
  margin-block-end: 0.5rem;
}

.card--pillar__tagline {
  font-size: var(--text-20);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-block-end: 2rem;
}

/* 고객사 텍스트 카드 */
.card--client {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  font-size: var(--text-14);
  font-weight: 600;
  color: var(--ink);
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  transition: border-color 0.2s;
}

.card--client:hover {
  border-color: var(--core-blue);
}

.card--client__name {
  font-size: var(--text-17);
  font-weight: 700;
}

.card--client__desc {
  font-size: var(--text-13);
  color: var(--muted);
  font-weight: 400;
}

/* 원칙 카드 */
.card--principle {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  /* grid item이 내용물(코드) 폭으로 팽창하지 않도록 */
  min-width: 0;
}

.card--principle:hover {
  border-color: var(--core-blue);
  box-shadow: 0 4px 20px rgba(30, 111, 217, 0.08);
}

.card--principle__num {
  font-family: var(--font-mono);
  font-size: var(--text-13);
  color: var(--muted);
}

.card--principle__title {
  font-size: var(--text-17);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

.card--principle__source {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  margin-block-start: auto;
}

/* 포지션 미니 카드 */
.card--position {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  background: #fff;
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.card--position:hover {
  border-color: var(--core-blue);
  box-shadow: 0 4px 16px rgba(30, 111, 217, 0.1);
  text-decoration: none;
}

/* ─── 7. 칩 / 배지 ──────────────────────────────────────────── */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--ink);
  background: rgba(22, 24, 29, 0.05);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 3px 8px;
  white-space: nowrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: var(--text-13);
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: 4px;
}

.badge--running {
  background: rgba(14, 159, 110, 0.12);
  color: var(--live-green);
}

.badge--running::before {
  content: '';
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--live-green);
  flex-shrink: 0;
}

.badge--recruiting {
  background: rgba(30, 111, 217, 0.1);
  color: var(--core-blue);
}

/* ─── 8. 버튼 ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  font-family: var(--font-sans);
  font-size: var(--text-14);
  font-weight: 700;
  letter-spacing: -0.01em;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, color 0.15s, border-color 0.15s, box-shadow 0.15s;
  white-space: nowrap;
}

.btn:hover {
  text-decoration: none;
}

.btn--primary {
  background: var(--core-blue);
  color: #fff;
  border-color: var(--core-blue);
}

.btn--primary:hover {
  background: #1558b0;
  border-color: #1558b0;
  color: #fff;
  box-shadow: 0 4px 16px rgba(30, 111, 217, 0.3);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.btn--ghost:hover {
  border-color: var(--core-blue);
  color: var(--core-blue);
}

.btn--ghost-light {
  background: transparent;
  color: var(--paper);
  border-color: rgba(252, 252, 250, 0.4);
}

.btn--ghost-light:hover {
  border-color: var(--paper);
  background: rgba(252, 252, 250, 0.1);
  color: var(--paper);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

/* ─── 9. 브라우저 프레임 목업 ────────────────────────────────── */
.browser-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: 0 8px 32px rgba(22, 24, 29, 0.12);
}

.browser-frame__bar {
  background: #F0F0EE;
  border-bottom: 1px solid var(--line);
  padding: 0.5rem 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.browser-frame__dots {
  display: flex;
  gap: 5px;
}

.browser-frame__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--line);
}

.browser-frame__dot:nth-child(1) { background: #FF5F57; }
.browser-frame__dot:nth-child(2) { background: #FEBC2E; }
.browser-frame__dot:nth-child(3) { background: #28C840; }

.browser-frame__url {
  flex: 1;
  height: 20px;
  background: #fff;
  border-radius: 4px;
  border: 1px solid var(--line);
  max-width: 280px;
  margin-inline: auto;
}

.browser-frame__screen {
  overflow: hidden;
  line-height: 0;
}

.browser-frame__screen img {
  width: 100%;
  height: auto;
  display: block;
}

.browser-frame__placeholder {
  aspect-ratio: 16 / 10;
  background: #F7F7F5;
  border: 2px dashed var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--text-13);
  color: var(--muted);
}

/* ─── 10. 상태판 (히어로 우측) ──────────────────────────────── */
.status-board {
  border: 1px solid rgba(228, 228, 222, 0.5);
  border-radius: var(--radius);
  background: rgba(252, 252, 250, 0.6);
  backdrop-filter: blur(8px);
  overflow: hidden;
}

.status-board__header {
  padding: 0.75rem 1.25rem;
  background: var(--code-bg);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.status-board__header-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-board__header-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(201, 209, 217, 0.7);
  letter-spacing: 0.06em;
}

.status-board__body {
  padding: 0.5rem 0;
}

.status-board__row {
  display: grid;
  grid-template-columns: 1.5rem 1fr auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.25rem;
  text-decoration: none;
  color: inherit;
  transition: background 0.15s;
  border-bottom: 1px solid var(--line);
}

.status-board__row:last-child {
  border-bottom: none;
}

.status-board__row:hover {
  background: rgba(30, 111, 217, 0.04);
  text-decoration: none;
}

.status-board__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--live-green);
  box-shadow: 0 0 0 3px rgba(14, 159, 110, 0.2);
  flex-shrink: 0;
  animation: pulse-green 2.5s ease-in-out infinite;
}

@keyframes pulse-green {
  0%, 100% { box-shadow: 0 0 0 3px rgba(14, 159, 110, 0.2); }
  50%       { box-shadow: 0 0 0 5px rgba(14, 159, 110, 0.08); }
}

.status-board__name {
  font-size: var(--text-14);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.status-board__desc {
  font-size: 0.75rem;
  color: var(--muted);
}

.status-board__status {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--live-green);
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

.status-board__name-wrap {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* ─── 11. 스택 배지 행 ──────────────────────────────────────── */
.stack-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.stack-row--scroll {
  flex-wrap: nowrap;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.stack-row--scroll::-webkit-scrollbar {
  display: none;
}

.stack-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--muted);
  background: rgba(22, 24, 29, 0.05);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 4px 10px;
  white-space: nowrap;
}

.section--dark .stack-tag {
  color: rgba(252, 252, 250, 0.6);
  background: rgba(252, 252, 250, 0.07);
  border-color: rgba(252, 252, 250, 0.12);
}

/* ─── 11-1. 스택 마키 (오른쪽 → 왼쪽 무한 흐름) ────────────── */
.stack-marquee {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to right, transparent, #000 6%, #000 94%, transparent);
  mask-image: linear-gradient(to right, transparent, #000 6%, #000 94%, transparent);
}

.stack-marquee__track {
  display: flex;
  width: max-content;
  animation: stack-marquee 32s linear infinite;
}

.stack-marquee__group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-inline-end: 0.5rem;
}

.stack-marquee:hover .stack-marquee__track {
  animation-play-state: paused;
}

@keyframes stack-marquee {
  to {
    transform: translateX(-50%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .stack-marquee__track {
    animation: none;
  }

  .stack-marquee {
    overflow-x: auto;
    -webkit-mask-image: none;
    mask-image: none;
  }
}

/* ─── 12. 푸터 ─────────────────────────────────────────────── */
.footer {
  background: var(--ink);
  color: rgba(252, 252, 250, 0.6);
  padding-block: 3rem;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
}

.footer__brand {
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin-block-end: 0.75rem;
}

.footer__info {
  font-size: var(--text-13);
  line-height: 1.9;
}

.footer__info a {
  color: rgba(252, 252, 250, 0.6);
  text-decoration: none;
  transition: color 0.15s;
}

.footer__info a:hover {
  color: var(--paper);
}

.footer__contact {
  text-align: right;
}

.footer__contact-label {
  font-family: var(--font-mono);
  font-size: var(--text-13);
  color: rgba(252, 252, 250, 0.4);
  margin-block-end: 0.5rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer__contact-link {
  font-size: var(--text-17);
  font-weight: 600;
  color: var(--paper);
  text-decoration: none;
  transition: color 0.15s;
}

.footer__contact-link:hover {
  color: var(--core-blue);
}

.footer__copy {
  width: 100%;
  padding-block-start: 1.5rem;
  border-block-start: 1px solid rgba(252, 252, 250, 0.1);
  font-size: var(--text-13);
  color: rgba(252, 252, 250, 0.3);
}

/* ─── 13. 유틸 — fade-up ────────────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-up--visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-up {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .toast {
    transition: none;
  }
}

/* ─── 13-1. 유틸 — 토스트 ──────────────────────────────────── */
.toast {
  position: fixed;
  top: 84px;
  left: 50%;
  transform: translate(-50%, -12px);
  z-index: 1000;
  padding: 0.65rem 1.25rem;
  background: var(--ink);
  color: var(--paper);
  font-size: var(--text-14);
  font-weight: 500;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(22, 24, 29, 0.25);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.toast--visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ─── 14. 반응형 ───────────────────────────────────────────── */

/* 1140px 이하 — 약간 여유 줄이기 */
@media (max-width: 1140px) {
  .container {
    padding-inline: 1.5rem;
  }
}

/* 768px 이하 — 모바일 전환 */
@media (max-width: 768px) {
  .section {
    padding-block: 72px;
  }

  .gnb__nav {
    display: none;
  }

  .gnb__hamburger {
    display: flex;
  }

  .mobile-menu {
    display: block;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .section-lead {
    max-width: none;
  }

  .footer__inner {
    flex-direction: column;
  }

  .footer__contact {
    text-align: left;
  }

  .status-board__row {
    grid-template-columns: 1.25rem 1fr auto;
    padding: 0.75rem 1rem;
  }
}

/* 480px 이하 — 소형 폰 */
@media (max-width: 480px) {
  .container {
    padding-inline: 1rem;
  }

  .section-headline {
    font-size: clamp(1.5rem, 8vw, 2rem);
  }

  .btn-group {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    justify-content: center;
  }

  .browser-frame__url {
    display: none;
  }
}