/* 듀와이브 — 폰 우선. 무채색 + 코발트 하나. 색은 변수 한 곳에서. 라이트/다크는 시스템 설정 + 수동 전환(data-theme). */
:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --ink: #0d0f12;
  --muted: #565c64;        /* bg 대비 6.4:1 */
  --faint: #8a9098;        /* 장식용 번호 등(본문 금지) */
  --line: #e2e2de;
  --line-strong: #c9c9c3;
  --accent: #2753d6;       /* 코발트 — 흰 바탕 대비 6.1:1 */
  --accent-ink: #ffffff;
  --accent-soft: #edf1fc;
  --ok: #18794e;
  --radius: 10px;
  --max: 1120px;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0b0c0e;
  --surface: #131518;
  --ink: #ecedef;
  --muted: #a0a6ae;
  --faint: #6c727a;
  --line: #24272c;
  --line-strong: #353a41;
  --accent: #8ba6ff;
  --accent-ink: #0b0c0e;
  --accent-soft: #171d2e;
  --ok: #4cc38a;
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0c0e;
    --surface: #131518;
    --ink: #ecedef;
    --muted: #a0a6ae;
    --faint: #6c727a;
    --line: #24272c;
    --line-strong: #353a41;
    --accent: #8ba6ff;
    --accent-ink: #0b0c0e;
    --accent-soft: #171d2e;
    --ok: #4cc38a;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.7 "Pretendard", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo",
        "Noto Sans KR", "Segoe UI", system-ui, sans-serif;
  word-break: keep-all;
  overflow-wrap: anywhere;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-underline-offset: 4px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.plain { list-style: none; margin: 0; padding: 0; }

.wrap { width: min(100% - 40px, var(--max)); margin-inline: auto; }
.skip {
  position: absolute; left: 12px; top: -60px; z-index: 20;
  background: var(--ink); color: var(--bg); padding: 10px 14px; border-radius: 6px;
}
.skip:focus { top: 12px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
.mono { font-family: var(--mono); font-size: 12.5px; letter-spacing: .02em; }

/* 머리 */
.top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: saturate(1.2) blur(12px);
  -webkit-backdrop-filter: saturate(1.2) blur(12px);
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; gap: 12px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; }
.brand svg { width: 28px; height: 28px; flex: none; }
.brand .word { font-weight: 700; font-size: 17px; letter-spacing: -.01em; }
.brand .word small { font-weight: 500; color: var(--muted); font-size: 13px; margin-left: 6px; letter-spacing: 0; }
.nav { display: none; margin-left: auto; gap: 2px; }
.nav a { color: var(--muted); text-decoration: none; padding: 8px 12px; font-size: 14.5px; }
.nav a:hover { color: var(--ink); }
.tools { display: flex; gap: 6px; margin-left: auto; }
.nav + .tools { margin-left: 8px; }
.chip-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-width: 44px; min-height: 44px; padding: 0 12px;
  border: 1px solid var(--line); border-radius: 8px; background: transparent;
  color: var(--ink); font: inherit; font-size: 13.5px; font-weight: 600; text-decoration: none; cursor: pointer;
}
.chip-btn:hover { border-color: var(--line-strong); background: var(--surface); }
.chip-btn svg { width: 17px; height: 17px; }
@media (min-width: 820px) { .nav { display: flex; } }

/* 첫 화면 */
.hero {
  padding: 64px 0 48px; border-bottom: 1px solid var(--line);
  background-image: radial-gradient(var(--line) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: -12px -12px;
}
.hero .eyebrow { display: flex; align-items: center; gap: 10px; color: var(--muted); margin: 0 0 22px; }
.hero .eyebrow .bar { width: 24px; height: 1px; background: var(--ink); }
.hero h1 { font-size: clamp(34px, 8vw, 68px); line-height: 1.12; letter-spacing: -.04em; margin: 0 0 22px; font-weight: 750; max-width: 15em; }
.hero h1 .soft { color: var(--muted); font-weight: 600; }
.hero p.lead { font-size: clamp(17px, 2.4vw, 19px); color: var(--muted); max-width: 34em; margin: 0 0 32px; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px; min-height: 48px; padding: 0 20px;
  border-radius: 8px; font-weight: 600; text-decoration: none; border: 1px solid transparent; font-size: 15px;
}
.btn.primary { background: var(--ink); color: var(--bg); }
.btn.primary:hover { background: var(--accent); color: var(--accent-ink); }
.btn.ghost { border-color: var(--line-strong); color: var(--ink); background: var(--surface); }
.btn.ghost:hover { border-color: var(--ink); }
.btn .arr { transition: transform .2s ease; }
.btn:hover .arr { transform: translateX(3px); }
@media (min-width: 820px) { .hero { padding: 120px 0 88px; } }

/* 숫자 띠 — 확인된 사실만 */
.facts { display: grid; grid-template-columns: repeat(2, 1fr); border-bottom: 1px solid var(--line); }
.facts li { padding: 22px 20px; border-right: 1px solid var(--line); border-top: 1px solid var(--line); }
.facts li:nth-child(-n+2) { border-top: 0; }
.facts li:nth-child(2n) { border-right: 0; }
.facts b { display: block; font-size: clamp(24px, 5vw, 32px); font-weight: 700; letter-spacing: -.03em; line-height: 1.2; }
.facts span { color: var(--muted); font-size: 14px; }
@media (min-width: 820px) {
  .facts { grid-template-columns: repeat(4, 1fr); }
  .facts li { border-top: 0; padding: 28px 24px; }
  .facts li:nth-child(2n) { border-right: 1px solid var(--line); }
  .facts li:last-child { border-right: 0; }
}

/* 구획 */
section { padding: 56px 0; border-bottom: 1px solid var(--line); }
@media (min-width: 820px) { section { padding: 96px 0; } }
.sec-head { display: grid; gap: 10px; margin-bottom: 32px; }
@media (min-width: 820px) {
  .sec-head { grid-template-columns: 220px 1fr; gap: 24px; margin-bottom: 48px; }
  .sec-head .label { padding-top: 10px; }
}
.sec-head .label { color: var(--muted); margin: 0; }
.sec-head .label b { color: var(--accent); font-weight: 600; margin-right: 8px; }
.sec-head h2 { font-size: clamp(26px, 4.6vw, 38px); letter-spacing: -.035em; line-height: 1.25; margin: 0 0 10px; font-weight: 700; }
.sec-head p { color: var(--muted); margin: 0; max-width: 38em; }

/* 서비스 */
.services { border-top: 1px solid var(--line); }
.services li { display: grid; gap: 6px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.services .num { color: var(--faint); }
.services h3 { margin: 0; font-size: 19px; letter-spacing: -.02em; font-weight: 650; }
.services p { margin: 0; color: var(--muted); }
.services .stack { color: var(--muted); margin-top: 4px; }
@media (min-width: 820px) {
  .services li { grid-template-columns: 220px 1fr 1.3fr; gap: 24px; align-items: baseline; padding: 30px 0; }
  .services .stack { grid-column: 3; margin-top: 0; }
}

/* 포트폴리오 */
.filters { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 20px; }
.filters button[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
@media (min-width: 720px) { .grid { grid-template-columns: repeat(2, 1fr); } }
.project { background: var(--surface); padding: 24px; display: flex; flex-direction: column; gap: 12px; min-height: 100%; }
@media (min-width: 820px) { .project { padding: 32px; } }
.project .row { display: flex; justify-content: space-between; align-items: center; gap: 12px; color: var(--muted); }
.status { display: inline-flex; align-items: center; gap: 7px; }
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--faint); }
.status.live::before { background: var(--ok); }
.status.beta::before { background: var(--accent); }
.project h3 { margin: 4px 0 0; font-size: 22px; letter-spacing: -.03em; font-weight: 700; }
.project h3 .en { font-size: 14px; font-weight: 500; color: var(--muted); margin-left: 8px; letter-spacing: 0; }
.project p { margin: 0; color: var(--muted); }
.project .stack { color: var(--muted); }
.project .note { font-size: 13px; color: var(--muted); border-left: 2px solid var(--line-strong); padding-left: 10px; }
.project .links { margin-top: auto; padding-top: 8px; display: flex; flex-wrap: wrap; gap: 4px 18px; }
.project .links a, .project .links span {
  display: inline-flex; align-items: center; gap: 6px; min-height: 44px;
  font-size: 14.5px; font-weight: 600; text-decoration: none;
}
.project .links a { color: var(--ink); border-bottom: 1px solid transparent; }
.project .links a:hover { color: var(--accent); }
.project .links span { color: var(--faint); }
/* 홀수 개일 때 빈 칸 메우기 */
.grid::after { content: ""; background: var(--surface); }
@media (max-width: 719px) { .grid::after { display: none; } }

/* 방향 */
.road { counter-reset: r; border-top: 1px solid var(--line); }
.road li { display: grid; gap: 6px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.road .when { color: var(--accent); }
.road h3 { margin: 0; font-size: 19px; letter-spacing: -.02em; font-weight: 650; }
.road p { margin: 0; color: var(--muted); }
@media (min-width: 820px) { .road li { grid-template-columns: 220px 1fr 1.3fr; gap: 24px; align-items: baseline; padding: 30px 0; } }

/* 문의 */
.contact { display: grid; gap: 28px; }
@media (min-width: 820px) { .contact { grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; } }
.contact h2 { font-size: clamp(28px, 5vw, 44px); letter-spacing: -.04em; line-height: 1.2; margin: 0 0 14px; font-weight: 700; }
.contact p { color: var(--muted); margin: 0; }
.contact dl { margin: 0; border-top: 1px solid var(--line); }
.contact dl div { display: grid; grid-template-columns: 110px 1fr; gap: 12px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.contact dt { color: var(--muted); }
.contact dd { margin: 0; }

/* 바닥 */
footer { padding: 40px 0 56px; color: var(--muted); font-size: 13.5px; }
footer .row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; align-items: center; }
footer .biz { display: grid; gap: 2px; margin: 16px 0; font-style: normal; }
footer a { color: var(--muted); }
footer .brand { color: var(--ink); }
.todo { color: #b0382a; font-weight: 600; }

/* 모션: 들어올 때 살짝. 줄이기 설정이면 없음 */
.reveal { opacity: 0; transform: translateY(8px); transition: opacity .5s ease, transform .5s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn .arr { transition: none; }
}
.no-js .reveal { opacity: 1; transform: none; }