/* ==========================================================================
   포트폴리오 사이트 — 미니멀 바이오그래피 스타일
   ========================================================================== */

:root {
  --color-bg: #ffffff;
  --color-ink: #161616;
  --color-ink-soft: #4a4a4a;
  --color-line: #e4e2de;
  --color-muted: #8a8a8a;
  --font-serif: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Noto Sans KR", sans-serif;
  --font-sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Noto Sans KR", sans-serif;
  --max-width: 1160px;
  --gutter: clamp(20px, 5vw, 64px);
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  opacity: 0;
  transition: opacity 0.45s ease;
}

body.page-visible { opacity: 1; }

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.content-pad-bottom {
  padding-bottom: clamp(60px, 10vw, 120px);
}

/* ---------- 헤더 / 내비게이션 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-line);
}

.site-header .container {
  display: flex;
  align-items: center;
  height: 84px;
}

.nav-menu {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(14px, 3vw, 44px);
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
}

.nav-menu li { flex: 0 0 auto; }

.logo-link {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  border-bottom: none !important;
  text-transform: none !important;
  display: inline-flex;
  align-items: center;
}

.logo-img {
  height: 26px;
  width: auto;
  display: block;
}

.nav-menu a {
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-ink);
  border-color: var(--color-ink);
}

/* ---------- 히어로 ---------- */
.hero {
  position: relative;
  height: 52vh;
  min-height: 340px;
  max-height: 560px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0) 40%, rgba(0,0,0,0.55) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  color: #fff;
  padding: 0 var(--gutter) 64px;
  width: 100%;
}

.eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.hero-content .eyebrow {
  opacity: 0.85;
  margin-bottom: 14px;
  color: inherit;
}

.hero-content h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2.2rem, 6vw, 4rem);
  margin: 0 0 12px;
}

.hero-content p {
  font-size: 1rem;
  max-width: 480px;
  opacity: 0.9;
  margin: 0;
}

/* ---------- 섹션 공통 ---------- */
.section {
  padding: clamp(60px, 10vw, 120px) 0;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: clamp(28px, 5vw, 48px);
  gap: 20px;
  flex-wrap: wrap;
}

.section-head h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0;
}

.section-head .desc {
  color: var(--color-muted);
  font-size: 0.92rem;
  max-width: 420px;
}

.section-head .link-more {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--color-ink);
  padding-bottom: 2px;
  white-space: nowrap;
}

/* ---------- 필터 탭 (All Projects / 카테고리별) ---------- */
.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3vw, 34px);
  margin-bottom: clamp(28px, 4vw, 44px);
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 18px;
}

.filter-tab {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
  padding: 0 0 4px;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.filter-tab:hover { color: var(--color-ink); }

.filter-tab.active {
  color: var(--color-ink);
  border-color: var(--color-ink);
}

.grid-item.is-hidden,
.project-card.is-hidden,
.video-item.is-hidden { display: none; }

/* ---------- 그리드 ---------- */
.grid {
  display: grid;
  gap: clamp(14px, 2vw, 28px);
}

.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.grid-item {
  position: relative;
  overflow: hidden;
  background: #f0efec;
  aspect-ratio: 4 / 5;
  cursor: pointer;
}

.grid-item.landscape {
  aspect-ratio: 3 / 2;
}

.grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.grid-item:hover img { transform: scale(1.05); }

.grid-item .caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 14px 16px;
  background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,0.55) 100%);
  color: #fff;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--transition), transform var(--transition);
}

.grid-item:hover .caption { opacity: 1; transform: translateY(0); }

/* ---------- 카테고리 카드 (Home Explore 섹션, 세로 스택) ---------- */
.category-cards {
  display: flex;
  flex-direction: column;
  gap: clamp(10px, 1.6vw, 16px);
}

.category-card {
  position: relative;
  aspect-ratio: 16 / 5;
  overflow: hidden;
  background: #111;
}

@media (max-width: 640px) {
  .category-card { aspect-ratio: 4 / 3; }
}

.category-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.75;
  transition: transform 0.6s ease, opacity var(--transition);
}

.category-card:hover img { transform: scale(1.05); opacity: 0.55; }

.category-card .label {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-align: center;
}

.category-card .label span.title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: 6px;
}

.category-card .label span.sub {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.85;
}

/* ---------- 프로젝트 카드 (Photo 메인) ---------- */
.project-card figure { margin: 0; }

.project-card .meta {
  padding-top: 14px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.project-card .meta h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.05rem;
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 0;
}

.project-card .meta h3::after {
  content: "→";
  display: inline-block;
  opacity: 0;
  max-width: 0;
  overflow: hidden;
  margin-left: 0;
  transition: opacity 0.3s ease, max-width 0.3s ease, margin-left 0.3s ease;
}

.project-card:hover .meta h3::after {
  opacity: 1;
  max-width: 24px;
  margin-left: 8px;
}

.project-card .meta span {
  font-size: 0.75rem;
  color: var(--color-muted);
}

/* ---------- 소개 티저 / About ---------- */
.about-teaser {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(30px, 6vw, 80px);
  align-items: center;
}

.about-teaser img {
  aspect-ratio: 4/5;
  object-fit: cover;
  width: 100%;
}

.about-teaser .text p {
  color: var(--color-ink-soft);
  font-size: 1rem;
  margin-bottom: 20px;
}

.btn {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 14px 30px;
  border: 1px solid var(--color-ink);
  transition: background var(--transition), color var(--transition);
}

.btn:hover { background: var(--color-ink); color: #fff; }

/* ---------- About 페이지 ---------- */
.about-hero {
  display: grid;
  grid-template-columns: 0.9fr 1.3fr;
  gap: clamp(30px, 6vw, 80px);
  align-items: start;
  padding-top: clamp(50px, 8vw, 90px);
}

.about-hero img { aspect-ratio: 4/5; object-fit: cover; }

.about-hero h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin: 0 0 20px;
}

.bio p {
  color: var(--color-ink-soft);
  margin-bottom: 18px;
}

.info-list {
  list-style: none;
  padding: 0;
  margin: 28px 0;
  border-top: 1px solid var(--color-line);
}

.info-list li {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.9rem;
}

.info-list li span:first-child {
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
}

/* ---------- Video ---------- */
.video-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 2.5vw, 30px);
}

.video-item { display: block; cursor: pointer; }

.video-item.large {
  max-width: 100%;
}

.video-item.large .play-btn::before {
  width: 84px;
  height: 84px;
}

.video-item.large .play-btn::after {
  border-width: 15px 0 15px 24px;
  margin-left: 6px;
}

.video-item .thumb-wrap {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #111;
}

.video-item .thumb-wrap img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s ease;
}

.video-item:hover .thumb-wrap img { transform: scale(1.05); }

.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.play-btn::before {
  content: "";
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
}

.play-btn::after {
  content: "";
  position: absolute;
  border-style: solid;
  border-width: 10px 0 10px 16px;
  border-color: transparent transparent transparent #161616;
  margin-left: 4px;
}

.video-item .v-category {
  padding-top: 12px;
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.video-item .v-title {
  padding-top: 4px;
  margin: 0;
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
}

.video-item .v-title::after {
  content: "→";
  display: inline-block;
  opacity: 0;
  max-width: 0;
  overflow: hidden;
  margin-left: 0;
  transition: opacity 0.3s ease, max-width 0.3s ease, margin-left 0.3s ease;
}

.video-item:hover .v-title::after {
  opacity: 1;
  max-width: 24px;
  margin-left: 8px;
}

.video-embed-frame {
  width: 100%;
  aspect-ratio: 16/9;
  border: none;
}

/* ---------- Contact ---------- */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(30px, 6vw, 80px);
  padding-top: clamp(50px, 8vw, 90px);
}

.contact-wrap h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin: 0 0 20px;
}

.social-links {
  display: flex;
  gap: 18px;
  margin-top: 30px;
}

.social-links a {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--color-ink);
  padding-bottom: 2px;
}

/* ---------- 프로젝트 상세 페이지 이동 ---------- */
.project-nav {
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--color-line);
  margin-top: 60px;
  padding-top: 24px;
  font-size: 0.85rem;
}

.project-title-block {
  padding: clamp(50px, 8vw, 90px) 0 30px;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: clamp(30px, 5vw, 50px);
}

.project-title-block h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin: 0 0 10px;
}

.project-title-block p {
  color: var(--color-muted);
  max-width: 520px;
}

/* ---------- 라이트박스 ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.94);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition);
}

.lightbox.is-open { opacity: 1; visibility: visible; }

.lightbox img {
  max-width: 88vw;
  max-height: 84vh;
  object-fit: contain;
}

.lightbox .lb-close,
.lightbox .lb-prev,
.lightbox .lb-next {
  position: absolute;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
  font-size: 1.6rem;
  padding: 10px;
}

.lightbox .lb-close { top: 20px; right: 24px; }
.lightbox .lb-prev { left: 16px; top: 50%; transform: translateY(-50%); }
.lightbox .lb-next { right: 16px; top: 50%; transform: translateY(-50%); }

/* ---------- 페이지 상단 타이틀 (Photo/Video 메인) ---------- */
.page-title {
  padding: clamp(50px, 8vw, 90px) 0 30px;
}

.page-title h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2rem, 4.5vw, 3rem);
  margin: 0 0 12px;
}

.page-title p {
  color: var(--color-muted);
  max-width: 480px;
}

/* ---------- 푸터 ---------- */
.site-footer {
  border-top: 1px solid var(--color-line);
  padding: 40px var(--gutter);
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.78rem;
  color: var(--color-muted);
}

.site-footer a { color: var(--color-ink-soft); }

.site-footer .foot-links {
  display: flex;
  gap: 18px;
  list-style: none;
  padding: 0;
  margin: 0;
}

/* ---------- 반응형 ---------- */
@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .video-list { grid-template-columns: repeat(2, 1fr); }
  .about-teaser,
  .about-hero,
  .contact-wrap { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .site-header .container { height: 64px; }
  .nav-menu {
    justify-content: flex-start;
    overflow-x: auto;
    gap: 22px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .nav-menu::-webkit-scrollbar { display: none; }
  .nav-menu a { font-size: 0.72rem; }
  .logo-link { font-size: 1.05rem; }
  .logo-img { height: 20px; }
  .grid-4, .grid-3, .video-list { grid-template-columns: repeat(2, 1fr); }
}