:root {
  --bg: #ffffff;
  --soft: #f8fafc;
  --soft2: #f1f5f9;
  --ink: #0f172a;
  --sub: #475569;
  --muted: #94a3b8;
  --line: #e2e8f0;
  --accent: #2563eb;
  --accent-soft: #eff6ff;
  --accent-ink: #1e40af;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Pretendard", -apple-system, "Apple SD Gothic Neo", sans-serif;
  font-size: 16px; line-height: 1.7; -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* 상단 바 */
.top { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.9); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { font-weight: 800; letter-spacing: 1px; font-size: 15px; }
.logo span { color: var(--accent); }
.top nav { display: flex; gap: 4px; }
.top nav a { padding: 6px 12px; border-radius: 8px; font-size: 14px; color: var(--sub); }
.top nav a:hover { color: var(--ink); background: var(--soft2); }
.top nav a.on { color: var(--accent); background: var(--accent-soft); font-weight: 600; }

/* 첫 화면 */
.hero { padding: 88px 0 80px; border-bottom: 1px solid var(--line); background: linear-gradient(180deg, #fff 0%, var(--soft) 100%); }
.hero .wrap { display: grid; grid-template-columns: 1.15fr 1fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(48px, 7vw, 72px); line-height: 1.05; margin: 0 0 14px; letter-spacing: -2px; }
.hero h1 span { color: var(--accent); }
.role { color: var(--accent); font-weight: 600; font-size: 15px; margin: 0 0 22px; }
.headline { font-size: clamp(21px, 2.4vw, 26px); font-weight: 700; line-height: 1.45; margin: 0 0 18px; }
.intro { color: var(--sub); margin: 0 0 30px; max-width: 520px; }
.btn { display: inline-flex; align-items: center; gap: 8px; background: var(--ink); color: #fff; padding: 12px 20px; border-radius: 10px; font-size: 15px; font-weight: 600; }
.btn:hover { background: #1e293b; }
.practice { border-top: 2px solid var(--ink); }
.practice h2 { font-size: 14px; font-weight: 600; margin: 14px 0 6px; }
.practice li { list-style: none; display: grid; grid-template-columns: 34px 1fr; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.practice ul { margin: 0; padding: 0; }
.practice .ic { width: 34px; height: 34px; border-radius: 8px; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; font-size: 15px; font-weight: 700; }
.practice b { display: block; font-size: 15px; }
.practice small { color: var(--sub); font-size: 13.5px; }
.hero-links { display: flex; gap: 18px; margin-top: 22px; font-size: 14px; color: var(--sub); }
.hero-links a:hover { color: var(--accent); }

/* 공통 섹션 */
section.sec { padding: 88px 0; border-bottom: 1px solid var(--line); }
.sec-head { margin-bottom: 36px; }
.sec-head .eyebrow { font-size: 13px; font-weight: 700; color: var(--accent); letter-spacing: 1px; margin: 0 0 8px; }
.sec-head h2 { font-size: clamp(26px, 3vw, 32px); margin: 0 0 10px; letter-spacing: -0.5px; }
.sec-head p { color: var(--sub); margin: 0; }

/* 스킬 */
.skills { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.skill { border: 1px solid var(--line); border-radius: 12px; padding: 20px; background: #fff; }
.skill h3 { font-size: 15px; margin: 0 0 12px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font-size: 12.5px; padding: 3px 10px; border-radius: 6px; background: var(--accent-soft); color: var(--accent-ink); font-weight: 500; }
.chip.gray { background: var(--soft2); color: var(--sub); }

/* 프로젝트 카드 */
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.card { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: #fff; display: flex; flex-direction: column; transition: box-shadow .2s, transform .2s; }
.card:hover { box-shadow: 0 12px 32px rgba(15,23,42,.08); transform: translateY(-2px); }
.thumb { height: 240px; background: var(--soft); border-bottom: 1px solid var(--line); display: grid; place-items: center; padding: 16px; }
.thumb img { max-height: 100%; object-fit: contain; }
.card-body { padding: 22px 24px 20px; display: flex; flex-direction: column; flex: 1; }
.meta-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.badge { font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 6px; background: var(--accent-soft); color: var(--accent-ink); }
.badge.gray { background: var(--soft2); color: var(--sub); }
.date { font-size: 13px; color: var(--muted); }
.card h3 { font-size: 20px; margin: 0 0 4px; letter-spacing: -0.3px; }
.card .sub { font-size: 14px; color: var(--sub); margin: 0 0 12px; }
.card p.desc { font-size: 14.5px; color: var(--sub); margin: 0 0 16px; }
.result-label { font-size: 12.5px; font-weight: 700; color: var(--sub); margin: 0 0 2px; }
.result-text { font-weight: 700; font-size: 15px; margin: 0 0 14px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.card ul.points { margin: 14px 0 0; padding-left: 18px; font-size: 14px; color: var(--sub); }
.card ul.points li { margin-bottom: 4px; }
.card-foot { margin-top: auto; padding-top: 18px; display: flex; justify-content: space-between; align-items: center; }
.card-foot .links { display: flex; gap: 14px; font-size: 14px; color: var(--sub); }
.card-foot .links a:hover { color: var(--accent); }
.go { width: 36px; height: 36px; border-radius: 8px; border: 1px solid var(--line); display: grid; place-items: center; font-size: 16px; }
.card:hover .go { background: var(--ink); color: #fff; border-color: var(--ink); }

/* 경력 */
.career { border: 1px solid var(--line); border-radius: 14px; padding: 28px; }
.career-head { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.career h3 { margin: 0; font-size: 22px; }
.career .role2 { color: var(--accent); font-weight: 600; font-size: 14.5px; }
.career > p { color: var(--sub); margin: 0 0 18px; }
.timeline { border-left: 2px solid var(--line); padding-left: 22px; margin-left: 4px; }
.tl { position: relative; padding-bottom: 20px; }
.tl::before { content: ""; position: absolute; left: -29px; top: 7px; width: 12px; height: 12px; border-radius: 50%; background: #fff; border: 2px solid var(--accent); }
.tl .date { display: block; }
.tl b { display: block; font-size: 16px; margin: 2px 0 4px; }
.tl p { margin: 0; color: var(--sub); font-size: 14.5px; }
.rows { display: grid; grid-template-columns: 1fr 1fr; gap: 36px 48px; margin-top: 40px; }
.rows h3 { font-size: 16px; margin: 0 0 8px; }
.row { display: grid; grid-template-columns: 112px 1fr; gap: 10px; padding: 11px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.row .date { padding-top: 1px; }
.row small { display: block; color: var(--sub); }
footer { padding: 36px 0 48px; text-align: center; color: var(--muted); font-size: 13px; }

/* 상세 페이지 */
.detail-head { padding: 48px 0 36px; }
.back { font-size: 14px; color: var(--sub); display: inline-flex; gap: 6px; margin-bottom: 26px; }
.back:hover { color: var(--accent); }
.detail-head h1 { font-size: clamp(32px, 4.4vw, 46px); line-height: 1.2; margin: 12px 0 8px; letter-spacing: -1px; }
.detail-head .sub { color: var(--sub); font-size: 15px; margin: 0 0 14px; }
.detail-head .lead { max-width: 760px; margin: 0 0 22px; }
.result-box { border-top: 1px solid var(--line); padding-top: 12px; max-width: 760px; margin-bottom: 18px; }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; margin: 26px 0 8px; }
.metric { padding: 18px 20px; border-right: 1px solid var(--line); background: #fff; }
.metric:last-child { border-right: 0; }
.metric strong { display: block; font-size: 26px; color: var(--accent); line-height: 1.2; letter-spacing: -0.5px; }
.metric span { font-size: 13px; color: var(--sub); }
.tabs { position: sticky; top: 60px; z-index: 10; background: rgba(255,255,255,.95); backdrop-filter: blur(6px); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.tabs .wrap { display: flex; gap: 4px; overflow-x: auto; }
.tabs a { padding: 14px 12px; font-size: 14px; color: var(--sub); white-space: nowrap; border-bottom: 2px solid transparent; }
.tabs a:hover, .tabs a.on { color: var(--ink); border-bottom-color: var(--ink); }
.d-sec { display: grid; grid-template-columns: 180px 1fr; gap: 32px; padding: 44px 0; border-bottom: 1px solid var(--line); }
.d-sec > h2 { font-size: 18px; margin: 0; }
.d-sec p { margin: 0 0 12px; }
.d-sec ul { margin: 0; padding-left: 18px; }
.d-sec li { margin-bottom: 6px; }
.info { width: 100%; border-collapse: collapse; font-size: 15px; }
.info th { width: 90px; text-align: left; color: var(--sub); font-weight: 600; padding: 9px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.info td { padding: 9px 0; border-bottom: 1px solid var(--line); }
.info a { color: var(--accent); }
figure.arch { margin: 0 0 18px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: #fff; }
figure.arch img { width: 100%; }
figure.arch figcaption { display: flex; justify-content: space-between; gap: 12px; font-size: 13px; color: var(--sub); padding: 10px 14px; border-top: 1px solid var(--line); background: var(--soft); }
figure.arch figcaption a { color: var(--accent); white-space: nowrap; }
.why { background: var(--accent-soft); border-radius: 10px; padding: 16px 18px; font-size: 15px; }
.why b { color: var(--accent-ink); display: block; margin-bottom: 4px; }
.steps { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 18px; }
.step { background: var(--soft2); border-radius: 8px; padding: 6px 12px; font-size: 13.5px; font-weight: 600; }
.steps .arr { color: var(--muted); }
.challenge { border: 1px solid var(--line); border-radius: 12px; padding: 22px 24px; margin-bottom: 20px; }
.challenge h3 { font-size: 18px; margin: 0 0 4px; }
.challenge .tags { font-size: 13px; color: var(--muted); margin: 0 0 16px; }
.pcr { display: grid; grid-template-columns: 76px 1fr; gap: 8px 16px; margin: 0; }
.pcr dt { font-weight: 700; font-size: 14px; color: var(--accent-ink); padding-top: 1px; }
.pcr dd { margin: 0; }
.outcome { margin: 16px 0 0; padding: 12px 16px; border-radius: 8px; background: var(--soft); font-weight: 700; border-left: 3px solid var(--accent); }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; margin: 16px 0 4px; }
table.data th, table.data td { padding: 9px 12px; border-bottom: 1px solid var(--line); text-align: left; }
table.data thead th { background: var(--soft); color: var(--sub); font-weight: 600; font-size: 13px; }
table.data .n { text-align: right; font-variant-numeric: tabular-nums; }
table.data .best { color: var(--accent); font-weight: 700; }
.cap { font-size: 13px; color: var(--muted); margin: 4px 0 0; }
pre.code { background: #0f172a; color: #e2e8f0; border-radius: 10px; padding: 16px 18px; font-size: 13px; line-height: 1.6; overflow-x: auto; margin: 14px 0 4px; }
pre.code .c { color: #94a3b8; }
.limits li { color: var(--sub); }
.pager { display: flex; justify-content: space-between; gap: 16px; padding: 36px 0 12px; }
.pager a { border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; font-size: 14px; color: var(--sub); flex: 1; }
.pager a:last-child { text-align: right; }
.pager a b { display: block; color: var(--ink); font-size: 15px; }
.pager a:hover { border-color: var(--ink); }

@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 40px; }
  .skills { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .rows { grid-template-columns: 1fr; gap: 24px; }
  .d-sec { grid-template-columns: 1fr; gap: 14px; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .metric:nth-child(2) { border-right: 0; }
  .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}
@media (max-width: 560px) {
  .top nav a { padding: 6px 7px; font-size: 13px; }
  .top nav a.hide-sm { display: none; }
  .hero { padding: 56px 0; }
  .thumb { height: 190px; }
  .pcr { grid-template-columns: 1fr; gap: 2px; }
  .pcr dd { margin-bottom: 8px; }
  .row { grid-template-columns: 96px 1fr; }
  .pager { flex-direction: column; }
  .pager a:last-child { text-align: left; }
  figure.arch figcaption { flex-direction: column; }
}