/* ITzIN 매거진 공용 스타일 — 자기 완결(외부 의존 없음), 반응형, 다크모드 */
:root {
  --itzin-bg: #ffffff;
  --itzin-surface: #f7f8fa;
  --itzin-surface-2: #eef0f4;
  --itzin-text: #16181d;
  --itzin-text-muted: #5b6472;
  --itzin-border: #e3e6ec;
  --itzin-primary: #3b3ff0;      /* ITzIN 인디고 */
  --itzin-primary-ink: #ffffff;
  --itzin-accent: #00c2a8;       /* 포인트 틸 */
  --itzin-lock: #8a7300;
  --itzin-lock-bg: #fff8e1;
  --itzin-pro: #6a2ff0;
  --itzin-pro-bg: #f3eefe;
  --itzin-radius: 14px;
  --itzin-maxw: 720px;
  --itzin-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo",
    "Malgun Gothic", "Noto Sans KR", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --itzin-bg: #0f1116;
    --itzin-surface: #171a21;
    --itzin-surface-2: #1e222b;
    --itzin-text: #eceef3;
    --itzin-text-muted: #9aa4b2;
    --itzin-border: #2a2f3a;
    --itzin-primary: #6d70ff;
    --itzin-accent: #2fd4bd;
    --itzin-lock: #e8c766;
    --itzin-lock-bg: #2a2410;
    --itzin-pro: #a98bff;
    --itzin-pro-bg: #201a33;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--itzin-font);
  background: var(--itzin-bg);
  color: var(--itzin-text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--itzin-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }

/* 헤더 */
.itzin-header {
  border-bottom: 1px solid var(--itzin-border);
  background: var(--itzin-bg);
  position: sticky; top: 0; z-index: 10;
}
.itzin-header .inner {
  max-width: 1080px; margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; gap: 20px;
}
.itzin-logo { font-weight: 800; font-size: 22px; letter-spacing: -0.5px; color: var(--itzin-text); }
.itzin-logo span { color: var(--itzin-primary); }
.itzin-nav { display: flex; gap: 16px; flex-wrap: wrap; font-size: 14px; color: var(--itzin-text-muted); }
.itzin-nav a { color: var(--itzin-text-muted); }
.itzin-header .cta { margin-left: auto; }

/* 버튼 */
.btn {
  display: inline-block; padding: 10px 18px; border-radius: 999px;
  font-weight: 600; font-size: 14px; cursor: pointer; border: 1px solid transparent;
}
.btn-primary { background: var(--itzin-primary); color: var(--itzin-primary-ink); }
.btn-pro { background: var(--itzin-pro); color: #fff; }
.btn-ghost { background: transparent; border-color: var(--itzin-border); color: var(--itzin-text); }

/* 아티클 레이아웃 */
.article-wrap { max-width: var(--itzin-maxw); margin: 0 auto; padding: 32px 20px 80px; }
.badges { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.badge {
  font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 999px;
  background: var(--itzin-surface-2); color: var(--itzin-text-muted);
}
.badge.category { background: color-mix(in srgb, var(--itzin-primary) 14%, transparent); color: var(--itzin-primary); }
.badge.premium { background: var(--itzin-pro-bg); color: var(--itzin-pro); }
h1.article-title { font-size: 32px; line-height: 1.3; letter-spacing: -0.5px; margin: 6px 0 10px; }
.article-subtitle { font-size: 18px; color: var(--itzin-text-muted); margin: 0 0 20px; }
.article-meta {
  display: flex; gap: 14px; flex-wrap: wrap; font-size: 14px; color: var(--itzin-text-muted);
  padding-bottom: 18px; border-bottom: 1px solid var(--itzin-border); margin-bottom: 24px;
}
.cover-placeholder {
  background: linear-gradient(135deg, var(--itzin-surface-2), var(--itzin-surface));
  border: 1px dashed var(--itzin-border); border-radius: var(--itzin-radius);
  aspect-ratio: 16 / 9; display: flex; align-items: center; justify-content: center;
  color: var(--itzin-text-muted); font-size: 14px; text-align: center; padding: 16px; margin-bottom: 28px;
}
.article-body { font-size: 17px; }
.article-body h2 { font-size: 23px; margin: 36px 0 12px; letter-spacing: -0.3px; }
.article-body h3 { font-size: 19px; margin: 28px 0 10px; }
.article-body p { margin: 14px 0; }
.article-body ul, .article-body ol { padding-left: 22px; }
.article-body pre {
  background: var(--itzin-surface); border: 1px solid var(--itzin-border);
  border-radius: 10px; padding: 16px; overflow-x: auto; font-size: 14px;
}
.article-body code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.article-body :not(pre) > code {
  background: var(--itzin-surface-2); padding: 2px 6px; border-radius: 6px; font-size: 0.9em;
}
.article-body blockquote {
  border-left: 3px solid var(--itzin-primary); margin: 16px 0; padding: 4px 16px;
  color: var(--itzin-text-muted); background: var(--itzin-surface);
}
.article-body table {
  width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 15px;
  display: block; overflow-x: auto;
}
.article-body th, .article-body td {
  border: 1px solid var(--itzin-border); padding: 10px 12px; text-align: left; vertical-align: top;
}
.article-body thead th { background: var(--itzin-surface-2); font-weight: 700; }
.article-body tbody tr:nth-child(even) { background: var(--itzin-surface); }

/* 광고 슬롯 */
.ad-slot {
  border: 1px dashed var(--itzin-border); border-radius: 10px; text-align: center;
  padding: 22px; margin: 28px 0; color: var(--itzin-text-muted); font-size: 13px;
  background: var(--itzin-surface);
}
.ad-slot[data-hide-for="pro"]::after { content: " (Pro 회원은 광고가 제거됩니다)"; opacity: .7; }

/* 요약 박스 (로그인 게이팅) */
.summary-box, .premium-box {
  border-radius: var(--itzin-radius); padding: 22px; margin: 30px 0; border: 1px solid var(--itzin-border);
}
.summary-box { background: var(--itzin-surface); }
.gate-title { font-weight: 700; font-size: 16px; margin: 0 0 12px; display: flex; align-items: center; gap: 8px; }
.gate-cta {
  margin-top: 14px; padding: 14px 16px; border-radius: 10px; background: var(--itzin-lock-bg);
  color: var(--itzin-lock); font-size: 14px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.gate-cta.pro { background: var(--itzin-pro-bg); color: var(--itzin-pro); }
.summary-list { margin: 0; padding-left: 20px; }
.keyword-chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.keyword-chips .chip { font-size: 13px; background: var(--itzin-surface-2); padding: 5px 12px; border-radius: 999px; }

/* 프리미엄 박스 (Pro 게이팅) */
.premium-box { background: var(--itzin-pro-bg); border-color: color-mix(in srgb, var(--itzin-pro) 30%, transparent); }
.locked-blur { filter: blur(5px); user-select: none; pointer-events: none; opacity: .65; }

/* 관련글 / 뉴스레터 / 댓글 */
.section-block { margin: 44px 0; }
.section-block h2 { font-size: 20px; margin-bottom: 14px; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.newsletter-box {
  background: linear-gradient(135deg, var(--itzin-primary), var(--itzin-accent));
  color: #fff; border-radius: var(--itzin-radius); padding: 26px; text-align: center;
}
.newsletter-box .btn { background: #fff; color: var(--itzin-primary); margin-top: 12px; }
.comments-placeholder {
  border: 1px solid var(--itzin-border); border-radius: 10px; padding: 20px;
  color: var(--itzin-text-muted); font-size: 14px; background: var(--itzin-surface);
}

/* 홈/인덱스 */
.home-wrap { max-width: 1080px; margin: 0 auto; padding: 32px 20px 80px; }
.home-hero { margin-bottom: 40px; }
.home-hero h1 { font-size: 30px; letter-spacing: -0.5px; }
.home-hero p { color: var(--itzin-text-muted); font-size: 17px; }
.cat-section { margin: 40px 0; }
.cat-section h2 { font-size: 20px; border-left: 4px solid var(--itzin-primary); padding-left: 10px; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; margin-top: 16px; }
.card {
  border: 1px solid var(--itzin-border); border-radius: var(--itzin-radius); overflow: hidden;
  background: var(--itzin-bg); display: flex; flex-direction: column;
}
.card .thumb {
  aspect-ratio: 16/9; background: linear-gradient(135deg, var(--itzin-surface-2), var(--itzin-surface));
  display: flex; align-items: center; justify-content: center; color: var(--itzin-text-muted); font-size: 12px;
}
.card .body { padding: 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card h3 { font-size: 17px; margin: 0; line-height: 1.4; }
.card .excerpt { font-size: 14px; color: var(--itzin-text-muted); margin: 0; }
.card .card-meta { margin-top: auto; font-size: 12px; color: var(--itzin-text-muted); display: flex; gap: 10px; }

/* 푸터 */
.itzin-footer {
  border-top: 1px solid var(--itzin-border); padding: 30px 20px; text-align: center;
  color: var(--itzin-text-muted); font-size: 13px;
}

@media (max-width: 640px) {
  h1.article-title { font-size: 26px; }
  .itzin-header .inner { gap: 12px; }
  .itzin-nav { display: none; }
}