:root {
  --log-ink: #101214;
  --log-paper: #f4f1e9;
  --log-surface: #fffdf8;
  --log-line: #d8d2c6;
  --log-muted: #666158;
  --log-blue: #2f6fed;
  --log-web: #087f72;
  --log-app: #2563eb;
  --log-engine: #c86b16;
  --log-radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.devlog-page {
  margin: 0;
  background: var(--log-paper);
  color: var(--log-ink);
  font-family: -apple-system, BlinkMacSystemFont, "Pretendard", "Noto Sans KR", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
}
body.devlog-page a { color: inherit; }
.devlog-page .skip-link {
  position: fixed;
  z-index: 300;
  top: -5rem;
  left: 1rem;
  padding: .75rem 1rem;
  background: #fff;
  color: #111;
}
.devlog-page .skip-link:focus { top: 1rem; }
.devlog-page main { padding-top: 52px; }
.devlog-shell { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.devlog-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 32px;
  background: var(--log-ink);
  color: #fff;
}
.devlog-hero::after {
  content: "";
  position: absolute;
  width: 44vw;
  height: 44vw;
  right: -15vw;
  top: -24vw;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 50%;
  box-shadow: 0 0 0 8vw rgba(255,255,255,.025), 0 0 0 16vw rgba(255,255,255,.018);
}
.devlog-kicker {
  margin: 0 0 12px;
  color: #9ec5ff;
  font-size: .75rem;
  line-height: 1.5;
  font-weight: 800;
  letter-spacing: .15em;
  text-transform: uppercase;
}
.devlog-hero h1 {
  max-width: 900px;
  margin: 0;
  font-size: 36px;
  line-height: 1.35;
  letter-spacing: -.035em;
  word-break: keep-all;
}
.devlog-lead {
  max-width: 720px;
  margin: 16px 0 0;
  color: #c9cbd0;
  font-size: 16px;
  line-height: 1.65;
  word-break: keep-all;
}
.devlog-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 20px;
  border-block: 1px solid rgba(255,255,255,.2);
}
.devlog-stats div { min-width: 0; padding: 12px 12px 12px 0; }
.devlog-stats strong { display: block; font-size: 24px; line-height: 1.2; }
.devlog-stats span { display: block; margin-top: 5px; color: #9b9da3; font-size: 12px; line-height: 1.5; overflow-wrap: anywhere; }
.devlog-filter {
  position: sticky;
  z-index: 20;
  top: 52px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 8px max(20px, calc((100vw - 1120px) / 2));
  background: rgba(244,241,233,.94);
  border-bottom: 1px solid var(--log-line);
  backdrop-filter: blur(14px);
  scrollbar-width: none;
}
.devlog-filter a,
.devlog-filter span {
  flex: 0 0 auto;
  min-height: 42px;
  padding: 10px 16px;
  border: 1px solid var(--log-line);
  border-radius: 999px;
  background: rgba(255,255,255,.55);
  font-size: .88rem;
  font-weight: 750;
  text-decoration: none;
}
.devlog-filter span { color: #8d877d; cursor: default; }
.devlog-filter a[aria-current="page"] { background: var(--log-ink); border-color: var(--log-ink); color: #fff; }
.devlog-content { padding: 32px 0 64px; }
.devlog-year-row { display: grid; grid-template-columns: 92px minmax(0, 1fr); gap: 24px; }
.devlog-year {
  position: sticky;
  top: 126px;
  align-self: start;
  margin: 0;
  color: #807a70;
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: -.06em;
}
.devlog-month { min-width: 0; }
.devlog-month-head { display: flex; justify-content: space-between; gap: 20px; align-items: baseline; margin-bottom: 16px; }
.devlog-month-head h2 { margin: 0; font-size: 26px; line-height: 1.35; letter-spacing: -.025em; }
.devlog-month-head span { color: var(--log-muted); font-size: .86rem; }
.devlog-card {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr);
  gap: 20px 24px;
  padding: 24px;
  border: 1px solid var(--log-line);
  border-radius: var(--log-radius);
  background: var(--log-surface);
  box-shadow: 0 20px 60px rgba(28,25,20,.06);
}
.devlog-date strong { display: block; font-size: 28px; line-height: 1.2; letter-spacing: -.04em; }
.devlog-date span { color: var(--log-muted); font-size: .82rem; font-weight: 750; }
.devlog-badges { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 12px; }
.devlog-badge { padding: 6px 10px; border-radius: 999px; background: #e9e5dc; font-size: .72rem; font-weight: 850; letter-spacing: .04em; }
.devlog-badge.web { background: #d9f1ed; color: #08685e; }
.devlog-badge.done { background: #e1e9fd; color: #234fbd; }
.devlog-card-copy { min-width: 0; }
.devlog-card h3 { margin: 0; font-size: 22px; line-height: 1.4; letter-spacing: -.025em; word-break: keep-all; overflow-wrap: anywhere; }
.devlog-card h3 a { text-decoration: none; }
.devlog-card h3 a:hover { color: var(--log-blue); }
.devlog-card-copy > p { max-width: 620px; margin: 16px 0 0; color: var(--log-muted); }
.devlog-arrow { display: inline-block; margin-left: 8px; color: var(--log-blue); }
.devlog-change { grid-column: 2; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; padding: 16px 0 0; border-top: 1px solid var(--log-line); }
.devlog-change > span { flex-basis: 100%; }
.devlog-change span { color: var(--log-muted); font-size: .75rem; font-weight: 800; letter-spacing: .09em; }
.devlog-change strong { font-size: 1rem; line-height: 1.45; }
.devlog-change i { color: var(--log-blue); font-style: normal; transform: rotate(-90deg); }
.devlog-note { margin: 28px 0 0 116px; color: var(--log-muted); font-size: .82rem; }

.devlog-day-hero { padding-bottom: 32px; }
.devlog-day-meta { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 18px; }
.devlog-day-meta span { padding: 7px 11px; border: 1px solid rgba(255,255,255,.22); border-radius: 999px; color: #dfe0e4; font-size: .75rem; font-weight: 800; }
.devlog-day-hero h1 { max-width: 820px; font-size: 36px; line-height: 1.35; }
.devlog-day-hero .devlog-lead { max-width: 760px; }
.devlog-section { padding: 40px 0; border-bottom: 1px solid var(--log-line); }
.devlog-section-head { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 24px; margin-bottom: 24px; }
.devlog-section-number { color: var(--log-blue); font-size: .78rem; font-weight: 900; letter-spacing: .12em; }
.devlog-section h2 { margin: 0; font-size: 26px; line-height: 1.4; letter-spacing: -.025em; word-break: keep-all; overflow-wrap: anywhere; }
.before-after { display: grid; grid-template-columns: minmax(0, 1fr) 48px minmax(0, 1fr); gap: 18px; align-items: stretch; }
.state-card { padding: 24px; border: 1px solid var(--log-line); border-radius: var(--log-radius); background: var(--log-surface); }
.state-card span { color: var(--log-muted); font-size: .72rem; font-weight: 900; letter-spacing: .14em; }
.state-card strong { display: block; margin-top: 16px; font-size: 22px; line-height: 1.45; word-break: keep-all; overflow-wrap: anywhere; }
.state-card.after { background: var(--log-ink); border-color: var(--log-ink); color: #fff; }
.state-card.after span { color: #9ec5ff; }
.state-arrow { display: grid; place-items: center; color: var(--log-blue); font-size: 24px; }
.event-list { position: relative; display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.event-list::before { content: ""; position: absolute; left: 82px; top: 22px; bottom: 22px; width: 1px; background: var(--log-line); }
.event-list li { position: relative; display: grid; grid-template-columns: 64px 18px minmax(0, 1fr); gap: 18px; align-items: start; padding: 17px 0; }
.event-list time { color: var(--log-muted); font-size: .82rem; font-variant-numeric: tabular-nums; }
.event-list i { position: relative; z-index: 1; width: 11px; height: 11px; margin-top: 7px; border: 3px solid var(--log-paper); border-radius: 50%; background: var(--log-blue); box-shadow: 0 0 0 1px var(--log-blue); }
.event-list strong { display: block; margin-bottom: 4px; }
.event-list p { margin: 0; color: var(--log-muted); overflow-wrap: anywhere; }
.impact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.impact-card { padding: 22px; border: 1px solid var(--log-line); border-radius: 18px; background: var(--log-surface); }
.impact-card span { display: inline-block; padding: 5px 9px; border-radius: 999px; font-size: .7rem; font-weight: 900; }
.impact-card.engine span { background: #f8e4d0; color: #925014; }
.impact-card.app span { background: #e1e9fd; color: #234fbd; }
.impact-card.web span { background: #d9f1ed; color: #08685e; }
.impact-card strong { display: block; margin-top: 18px; font-size: 18px; }
.impact-card p { margin: 8px 0 0; color: var(--log-muted); }
.artifact-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.artifact-list li { display: grid; grid-template-columns: minmax(160px, .45fr) 1fr; gap: 22px; padding: 18px 0; border-bottom: 1px solid var(--log-line); }
.artifact-list code { font-size: .9rem; font-weight: 800; }
.artifact-list span { color: var(--log-muted); }
.status-list { display: grid; gap: 17px; }
.status-row { display: grid; grid-template-columns: minmax(140px, .35fr) 1fr 78px; gap: 18px; align-items: center; }
.status-row span { font-size: .88rem; font-weight: 750; }
.status-track { height: 9px; overflow: hidden; border-radius: 999px; background: #dfdad0; }
.status-track i { display: block; width: var(--progress); height: 100%; border-radius: inherit; background: var(--log-blue); }
.status-row b { color: var(--log-muted); font-size: .78rem; text-align: right; }
.decision-card { padding: 28px; border-radius: var(--log-radius); background: #dfe9ff; }
.decision-card p { max-width: 820px; margin: 0; font-size: 22px; font-weight: 750; line-height: 1.6; letter-spacing: -.025em; word-break: keep-all; overflow-wrap: anywhere; }
.next-flow { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.next-flow span { padding: 12px 16px; border: 1px solid var(--log-line); border-radius: 999px; background: var(--log-surface); font-size: .88rem; font-weight: 750; }
.next-flow i { color: var(--log-blue); font-style: normal; }
.record-caution { margin-top: 34px; padding: 18px 20px; border-left: 3px solid var(--log-engine); background: rgba(255,255,255,.48); color: var(--log-muted); font-size: .84rem; }
.devlog-footer { display: flex; justify-content: space-between; gap: 24px; padding: 30px max(20px, calc((100vw - 1120px)/2)); background: var(--log-ink); color: #aeb0b5; font-size: .82rem; }
.devlog-footer a { color: #fff; text-underline-offset: 3px; }
.devlog-page a:focus-visible { outline: 3px solid #7da9ff; outline-offset: 5px; }

@media (max-width: 760px) {
  .devlog-shell { width: min(100% - 28px, 1120px); }
  .devlog-hero, .devlog-day-hero { padding: 28px 0 24px; }
  .devlog-kicker { margin-bottom: 10px; }
  .devlog-hero h1, .devlog-day-hero h1 { font-size: 28px; line-height: 1.35; }
  .devlog-lead { margin-top: 12px; }
  .devlog-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-top: 12px; }
  .devlog-stats div { padding: 10px 0; }
  .devlog-stats strong { font-size: 20px; }
  .devlog-stats span { margin-top: 4px; font-size: 11px; line-height: 1.45; }
  .devlog-content { padding: 24px 0 48px; }
  .devlog-year-row { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .devlog-year { position: static; font-size: 24px; }
  .devlog-month-head { margin-bottom: 12px; }
  .devlog-month-head h2 { font-size: 22px; }
  .devlog-card { grid-template-columns: minmax(0, 1fr); gap: 12px; padding: 18px; }
  .devlog-card h3 { font-size: 20px; }
  .devlog-card-copy > p { margin-top: 12px; }
  .devlog-badges { margin-bottom: 10px; }
  .devlog-badge { padding: 4px 8px; }
  .devlog-date strong { font-size: 24px; }
  .devlog-date { display: flex; gap: 9px; align-items: baseline; }
  .devlog-change { grid-column: 1; padding-top: 14px; }
  .devlog-note { margin-left: 0; }
  .devlog-day-meta { margin-bottom: 16px; }
  .devlog-section { padding: 28px 0; }
  .devlog-section-head { grid-template-columns: minmax(0, 1fr); gap: 10px; margin-bottom: 18px; }
  .devlog-section h2 { font-size: 22px; }
  .state-card { padding: 20px; }
  .state-card strong { font-size: 20px; }
  .decision-card { padding: 22px; }
  .decision-card p { font-size: 20px; }
  .before-after { grid-template-columns: 1fr; }
  .state-arrow { transform: rotate(90deg); }
  .impact-grid { grid-template-columns: 1fr; }
  .artifact-list li { grid-template-columns: 1fr; gap: 5px; }
  .status-row { grid-template-columns: 1fr 64px; }
  .status-track { grid-column: 1 / -1; grid-row: 2; }
  .status-row b { grid-column: 2; grid-row: 1; }
  .devlog-footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}