/* 김서준 — 담백한 정적 포트폴리오
   외부 요청 없음. 시스템 폰트만 사용. */

:root {
  --bg:        #ffffff;
  --fg:        #1a1a1a;
  --muted:     #6b6b6b;
  --faint:     #8f8f8f;
  --rule:      #e5e5e5;
  --rule-soft: #f0f0f0;
  --chip-bg:   #f4f4f4;
  --accent:    #1a1a1a;

  --measure: 42rem;
  --gap: 1.6rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #141414;
    --fg:        #e8e6e3;
    --muted:     #9a9a9a;
    --faint:     #7d7d7d;
    --rule:      #2c2c2c;
    --rule-soft: #232323;
    --chip-bg:   #212121;
    --accent:    #e8e6e3;
  }
}

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

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo",
               "Pretendard", "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: -0.003em;
  word-break: keep-all;
  overflow-wrap: anywhere;
  -webkit-font-smoothing: antialiased;
}

/* 건너뛰기 링크 */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--fg);
  color: var(--bg);
  padding: 0.6rem 1rem;
  z-index: 10;
}
.skip:focus { left: 0; }

.page {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 5.5rem 1.5rem 6rem;
}

/* ── 헤더 ───────────────────────────────── */

.head { margin-bottom: 4.5rem; }

.head h1 {
  margin: 0;
  font-size: 1.9rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.head .role {
  margin: 0.35rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.head .lede {
  margin: 1.6rem 0 0;
  color: var(--fg);
  font-size: 1rem;
}

/* ── 섹션 ───────────────────────────────── */

.section {
  padding-top: 2.4rem;
  margin-bottom: 3.4rem;
  border-top: 1px solid var(--rule);
}

.section > h2 {
  margin: 0 0 2rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

/* ── 항목 ───────────────────────────────── */

.item {
  display: grid;
  grid-template-columns: 9.5rem 1fr;
  gap: 0 2rem;
  padding-bottom: 2.4rem;
  margin-bottom: 2.4rem;
  border-bottom: 1px solid var(--rule-soft);
}

.section .item:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding-top: 0.32rem;
}

.date {
  font-size: 0.8rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.kind {
  font-size: 0.75rem;
  color: var(--faint);
}

.body h3 {
  margin: 0 0 0.9rem;
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.5;
}

.body h3 .pos {
  display: block;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--muted);
  margin-top: 0.15rem;
}

.body > p {
  margin: 0 0 0.9rem;
}

.body .sub {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: -0.5rem;
}

/* 문제 / 한 일 / 결과 */

.body dl {
  margin: 0;
  display: grid;
  grid-template-columns: 3.4rem 1fr;
  gap: 0.35rem 0.9rem;
}

.body dt {
  font-size: 0.78rem;
  color: var(--faint);
  padding-top: 0.28rem;
  letter-spacing: 0.02em;
}

.body dd {
  margin: 0;
}

/* 목록 */

.list {
  margin: 0 0 0.9rem;
  padding-left: 1.05rem;
}

.list li { margin-bottom: 0.25rem; }
.list li::marker { color: var(--faint); }

/* 태그 */

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
}

.tags li {
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--muted);
  background: var(--chip-bg);
  padding: 0.12rem 0.55rem;
  border-radius: 2px;
}

/* 검증 표시 */

.note {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0;
}

.flag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--faint);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 0 0.35rem;
  white-space: nowrap;
  vertical-align: 0.05em;
}

/* ── 기술 ───────────────────────────────── */

.skills {
  margin: 0;
  display: grid;
  grid-template-columns: 9.5rem 1fr;
  gap: 0 2rem;
}

.skills dt {
  font-size: 0.8rem;
  color: var(--muted);
  padding-top: 0.02rem;
}

.skills dd {
  margin: 0 0 1.1rem;
}

.skills dd:last-child { margin-bottom: 0; }

/* ── 원칙 ───────────────────────────────── */

.principle {
  margin: 0;
  font-size: 1.02rem;
}

.principle strong { font-weight: 600; }

/* ── 푸터 ───────────────────────────────── */

.foot {
  padding-top: 2.4rem;
  border-top: 1px solid var(--rule);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--faint);
}

.foot p { margin: 0 0 0.5rem; }
.updated { font-variant-numeric: tabular-nums; }

/* ── 좁은 화면 ──────────────────────────── */

@media (max-width: 34rem) {
  .page { padding: 3.5rem 1.25rem 4rem; }

  .item,
  .skills {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .meta {
    flex-direction: row;
    gap: 0.6rem;
    padding-top: 0;
    margin-bottom: 0.6rem;
  }

  .skills dt { margin-bottom: 0.2rem; }

  .body dl {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .body dt {
    padding-top: 0.6rem;
    margin-bottom: -0.1rem;
  }

  .head { margin-bottom: 3.2rem; }
  .head h1 { font-size: 1.7rem; }
}

/* ── 인쇄 ───────────────────────────────── */

@media print {
  :root {
    --bg: #fff; --fg: #000; --muted: #444;
    --faint: #666; --rule: #ccc; --rule-soft: #e5e5e5; --chip-bg: #f2f2f2;
  }
  .page { padding: 0; max-width: none; }
  .skip { display: none; }
  .item, .section { break-inside: avoid; }
}