/* ─────────────────────────────────────────────
   Portfolio — minimal white
   ───────────────────────────────────────────── */

:root {
  --bg: #ffffff;
  --bg-soft: #f5f5f4;
  --text: #111111;
  --text-sub: #6b6b6b;
  --text-faint: #a3a3a3;
  --line: #e7e7e5;
  --max: 1280px;
  --gutter: clamp(20px, 4vw, 48px);
  --header-h: 64px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: -0.015em;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }

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

.label {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-sub);
}

/* ── Header ─────────────────────────────────── */

.site-header {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 50;
  height: var(--header-h);
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.site-header.is-scrolled { border-bottom-color: var(--line); }

.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo { font-weight: 700; font-size: 17px; letter-spacing: -0.02em; }

.nav { display: flex; gap: clamp(18px, 3vw, 36px); font-size: 15px; }
.nav a { color: var(--text-sub); transition: color .2s; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); }

/* ── Hero (home) ────────────────────────────── */

.hero { padding-top: clamp(80px, 14vw, 180px); padding-bottom: clamp(64px, 9vw, 120px); }

.hero h1 {
  font-size: clamp(34px, 6.2vw, 80px);
  line-height: 1.18;
  font-weight: 700;
  letter-spacing: -0.045em;
}
.hero h1 .faint { color: var(--text-faint); }

.hero-meta {
  margin-top: clamp(32px, 5vw, 56px);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 32px;
  font-size: 15px;
  color: var(--text-sub);
}

/* ── Section heading ────────────────────────── */

.section { padding: clamp(64px, 9vw, 120px) 0; }
.section + .section { border-top: 1px solid var(--line); }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(32px, 4vw, 48px);
}
.section-head h2 { font-size: clamp(22px, 2.6vw, 30px); font-weight: 700; letter-spacing: -0.03em; }

/* ── Work grid (home) ───────────────────────── */

.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(40px, 5vw, 72px) clamp(20px, 3vw, 40px);
}

.work-card { display: block; }

.work-card .thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: 6px;
  background: var(--bg-soft);
}
.work-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform .9s var(--ease);
}
.work-card:hover .thumb img { transform: scale(1.03); }

.work-card .info {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 4px 14px;
  align-items: baseline;
  margin-top: 18px;
}
.work-card .num { font-size: 13px; color: var(--text-faint); font-variant-numeric: tabular-nums; }
.work-card .title { font-size: 19px; font-weight: 600; letter-spacing: -0.02em; }
.work-card .year { font-size: 14px; color: var(--text-faint); }
.work-card .desc { grid-column: 2 / -1; font-size: 15px; color: var(--text-sub); }

/* 광고소재 카드: 소재 3장을 모아서 표지로 사용 */
.thumb.collage {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 10%;
  align-items: center;
}
.thumb.collage img {
  height: auto;
  aspect-ratio: 1;
  border-radius: 3px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, .08);
}

/* ── About / Contact ────────────────────────── */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: clamp(32px, 6vw, 96px);
}
.about-grid .lead { font-size: clamp(19px, 2vw, 24px); line-height: 1.6; font-weight: 500; letter-spacing: -0.02em; }
.about-grid .lead + p { margin-top: 20px; color: var(--text-sub); }

.cv { margin-top: 48px; }
.cv h3 { font-size: 13px; font-weight: 500; letter-spacing: 0.02em; color: var(--text-sub); margin-bottom: 4px; }
.cv ul { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.cv li {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.cv .when { font-size: 14px; color: var(--text-faint); font-variant-numeric: tabular-nums; padding-top: 2px; }
.cv b { font-size: 16px; font-weight: 600; }
.cv em { margin-left: 6px; font-style: normal; font-size: 14px; color: var(--text-sub); }
.cv p { margin-top: 4px; font-size: 15px; color: var(--text-sub); }

.facts { list-style: none; margin: 40px 0 0; padding: 0; border-top: 1px solid var(--line); }
.facts li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}
.facts li span:first-child { color: var(--text-sub); }

.contact-big {
  display: inline-block;
  font-size: clamp(26px, 4.4vw, 56px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.2;
  border-bottom: 2px solid currentColor;
  transition: opacity .2s;
}
.contact-big:hover { opacity: .55; }

.contact-row { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 24px; }
.contact-row .contact-big { overflow-wrap: anywhere; min-width: 0; user-select: all; }
.copy-btn {
  height: 40px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: border-color .2s;
}
.copy-btn:hover { border-color: var(--text); }
:focus-visible { outline: 2px solid var(--text); outline-offset: 3px; }

.site-footer {
  padding: 32px 0 40px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--text-faint);
}
.site-footer .container { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ── Project page ───────────────────────────── */

.project-head { padding: clamp(64px, 10vw, 140px) 0 clamp(40px, 5vw, 64px); }
.project-head .label { margin-bottom: 18px; }
.project-head h1 {
  font-size: clamp(32px, 5.4vw, 68px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.045em;
}
.project-head .summary {
  margin-top: 24px;
  max-width: 720px;
  font-size: clamp(17px, 1.6vw, 20px);
  color: var(--text-sub);
}

.meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: clamp(40px, 5vw, 64px);
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.meta dt { font-size: 13px; color: var(--text-faint); margin-bottom: 6px; }
.meta dd { margin: 0; font-size: 15px; font-weight: 500; }

.cover {
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-soft);
}

/* 본문 블록: 왼쪽 제목 + 오른쪽 내용 */
.block {
  display: grid;
  grid-template-columns: 1fr 2.4fr;
  gap: clamp(24px, 5vw, 80px);
  padding: clamp(56px, 8vw, 104px) 0 0;
}
.block > h2 { font-size: 15px; font-weight: 600; }
.block > h2 small { display: block; margin-top: 4px; font-size: 13px; font-weight: 400; color: var(--text-faint); }
.block-body > p { font-size: 17px; }
.block-body > p + p { margin-top: 16px; }

.points { list-style: none; margin: 0; padding: 0; counter-reset: point; }
.points li {
  counter-increment: point;
  position: relative;
  padding: 20px 0 20px 44px;
  border-top: 1px solid var(--line);
}
.points li:last-child { border-bottom: 1px solid var(--line); }
.points li::before {
  content: counter(point, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 22px;
  font-size: 13px;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}
.points strong { display: block; font-size: 17px; font-weight: 600; margin-bottom: 4px; }
.points span { color: var(--text-sub); font-size: 15px; }

/* 컬러 */
.swatches { display: flex; flex-wrap: wrap; gap: 16px; }
.swatch { width: 132px; }
.swatch i {
  display: block;
  height: 88px;
  border-radius: 6px;
  border: 1px solid rgba(0, 0, 0, .06);
}
.swatch b { display: block; margin-top: 10px; font-size: 14px; font-weight: 600; }
.swatch code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; color: var(--text-sub); }

/* 화면 섹션 */
.screens-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin: clamp(72px, 10vw, 128px) 0 24px;
}
.screens-title h2 { font-size: clamp(22px, 2.4vw, 28px); font-weight: 700; letter-spacing: -0.03em; }

/* 브라우저 프레임: 긴 화면을 안에서 스크롤해서 봄 */
.browser {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 24px 60px -24px rgba(0, 0, 0, .12);
}
.browser-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 36px;
  padding: 0 14px;
  background: #f7f7f6;
  border-bottom: 1px solid var(--line);
}
.browser-bar i { width: 10px; height: 10px; border-radius: 50%; background: #dcdcda; }
.browser-bar span { margin-left: 10px; font-size: 12px; color: var(--text-faint); }
.browser-view {
  height: min(78vh, 820px);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.scroll-hint { margin-top: 12px; font-size: 13px; color: var(--text-faint); text-align: center; }

/* 화면 그리드 */
.screen-groups { display: grid; gap: 48px; }
.screen-group h3 { font-size: 14px; font-weight: 600; margin-bottom: 16px; }
.screen-group h3 small { margin-left: 8px; font-weight: 400; color: var(--text-faint); }

.screen-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px 20px;
}
.screen-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.screen-grid.mobile { grid-template-columns: repeat(6, 1fr); gap: 24px 14px; }
.screen-grid.mobile .frame { aspect-ratio: 9 / 16; border-radius: 10px; }

.shot { display: block; width: 100%; padding: 0; border: 0; background: none; text-align: left; cursor: zoom-in; font: inherit; color: inherit; }
.shot .frame {
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg-soft);
}
.shot img { width: 100%; height: 100%; object-fit: cover; object-position: top; transition: transform .6s var(--ease); }
.shot:hover img { transform: scale(1.025); }
.shot .cap { display: block; margin-top: 10px; font-size: 14px; color: var(--text-sub); }

/* 모바일 화면: 폰 프레임 안에서 스크롤 */
.phones {
  display: flex;
  gap: 28px;
  overflow-x: auto;
  padding: 8px 2px 24px;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}
.phone { flex: 0 0 auto; width: 260px; scroll-snap-align: start; }
.phone-view {
  height: 540px;
  overflow-y: auto;
  overscroll-behavior: contain;
  border: 6px solid #111;
  border-radius: 34px;
  background: #fff;
  scrollbar-width: none;
}
.phone-view::-webkit-scrollbar { display: none; }
.phone .cap { display: block; margin-top: 14px; font-size: 14px; color: var(--text-sub); text-align: center; }

/* 광고소재 */
.ad-group + .ad-group { margin-top: clamp(64px, 8vw, 96px); }
.ad-group-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 16px;
  align-items: baseline;
  padding-bottom: 18px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.ad-group-head h2 { font-size: clamp(19px, 2vw, 22px); font-weight: 700; letter-spacing: -0.02em; }
.ad-group-head .tag { font-size: 13px; color: var(--text-sub); }
.ad-group-head p { grid-column: 1 / -1; font-size: 15px; color: var(--text-sub); }

.ad-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.ad-grid.story { grid-template-columns: repeat(4, 1fr); }
.ad-grid .shot .frame { aspect-ratio: 1; border: 0; border-radius: 4px; }
.ad-grid.story .shot .frame { aspect-ratio: 9 / 16; }
.ad-grid .shot img { object-fit: cover; }

/* 관련 작업 / 다음 프로젝트 */
.related {
  margin-top: clamp(72px, 10vw, 128px);
  padding: clamp(32px, 4vw, 48px);
  background: var(--bg-soft);
  border-radius: 8px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}
.related h3 { font-size: 19px; font-weight: 600; margin-top: 6px; }
.related > * { min-width: 0; }
.related .mini { display: flex; gap: 10px; }
.related .mini img { flex: 0 1 84px; min-width: 0; height: auto; aspect-ratio: 1; object-fit: cover; border-radius: 4px; }

.next {
  display: block;
  margin-top: clamp(80px, 10vw, 140px);
  padding: clamp(48px, 7vw, 88px) 0;
  border-top: 1px solid var(--line);
}
.next .title {
  margin-top: 10px;
  font-size: clamp(28px, 4.6vw, 56px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.2;
  transition: opacity .2s;
}
.next:hover .title { opacity: .55; }
.next .title::after { content: " →"; }

/* ── Lightbox ───────────────────────────────── */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  background: rgba(255, 255, 255, .97);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.lightbox.is-open { display: block; }
.lightbox-inner {
  max-width: min(1200px, 100%);
  margin: 0 auto;
  padding: 72px var(--gutter) 80px;
}
.lightbox-inner.is-narrow { max-width: 460px; }
.lightbox img { width: 100%; border-radius: 4px; box-shadow: 0 10px 50px rgba(0, 0, 0, .1); }
.lightbox-cap { margin-top: 16px; text-align: center; font-size: 14px; color: var(--text-sub); }
.lightbox-ui {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  padding: 0 16px;
  pointer-events: none;
}
.lightbox-ui button {
  pointer-events: auto;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: rgba(0, 0, 0, .06);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  transition: background .2s;
}
.lightbox-ui button:hover { background: rgba(0, 0, 0, .12); }
.lightbox-ui .count { margin-right: auto; padding-left: 8px; font-size: 13px; color: var(--text-sub); }

/* ── Reveal on scroll ───────────────────────── */

/* 첫 화면 아래에 있는 요소만 스크롤할 때 나타남 (처음 보이는 화면은 항상 완성된 상태) */
.reveal { transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.is-pending { opacity: 0; transform: translateY(24px); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .reveal.is-pending { opacity: 1; transform: none; transition: none; }
  .work-card .thumb img, .shot img { transition: none; }
}

/* ── Responsive ─────────────────────────────── */

@media (max-width: 960px) {
  .meta { grid-template-columns: repeat(2, 1fr); }
  .block { grid-template-columns: 1fr; gap: 20px; }
  .screen-grid { grid-template-columns: repeat(2, 1fr); }
  .screen-grid.mobile { grid-template-columns: repeat(4, 1fr); }
  .ad-grid { grid-template-columns: repeat(3, 1fr); }
  .ad-grid.story { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  :root { --header-h: 56px; }
  .work-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .facts li { grid-template-columns: 96px 1fr; }
  .cv li { grid-template-columns: 1fr; gap: 4px; }
  .screen-grid, .screen-grid.cols-2 { grid-template-columns: 1fr; }
  .screen-grid.mobile { grid-template-columns: repeat(3, 1fr); }
  .ad-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .browser-view { height: 70vh; }
  .phone { width: 230px; }
  .phone-view { height: 480px; }
  .related { grid-template-columns: 1fr; }
  .nav { gap: 18px; font-size: 14px; }
}