/* LeadForge 블로그 공통 스타일 */
:root{
  --paper:#F5F8F6; --surface:#FFFFFF; --surface-2:#EEF3F0;
  --ink:#0D1512; --soft:#47564F; --mut:#87938C;
  --line:#E1E9E4; --line2:#CEDAD3;
  --accent:#0BA678; --accent-ink:#067A54; --accent-soft:#DEF3EB; --on-accent:#04140E;
  --shadow:0 1px 2px rgba(13,21,18,.05), 0 18px 40px -24px rgba(13,21,18,.28);
}
:root:not([data-theme="light"]){ @media (prefers-color-scheme: dark){
  --paper:#07110D; --surface:#0F1A15; --surface-2:#0B1712;
  --ink:#E9F1ED; --soft:#A6B5AD; --mut:#6C7C74;
  --line:#182A22; --line2:#26382F;
  --accent:#2FD69A; --accent-ink:#6EE7B8; --accent-soft:#0F2A20; --on-accent:#04140E;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 22px 46px -26px rgba(0,0,0,.7);
}}
:root[data-theme="dark"]{
  --paper:#07110D; --surface:#0F1A15; --surface-2:#0B1712;
  --ink:#E9F1ED; --soft:#A6B5AD; --mut:#6C7C74;
  --line:#182A22; --line2:#26382F;
  --accent:#2FD69A; --accent-ink:#6EE7B8; --accent-soft:#0F2A20; --on-accent:#04140E;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 22px 46px -26px rgba(0,0,0,.7);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0; background:var(--paper); color:var(--ink); font-family:"Pretendard Variable",Pretendard,system-ui,sans-serif; line-height:1.7; -webkit-font-smoothing:antialiased}
.mono{font-family:"IBM Plex Mono",monospace}
.wrap{max-width:760px; margin:0 auto; padding:0 22px}
.wrap--wide{max-width:1080px}
mark{background:var(--accent); color:var(--on-accent); padding:.02em .12em; border-radius:3px}

/* nav */
.nav{position:sticky; top:0; z-index:20; background:color-mix(in srgb, var(--paper) 86%, transparent); backdrop-filter:saturate(1.4) blur(10px); border-bottom:1px solid var(--line)}
.nav__in{max-width:1080px; margin:0 auto; padding:14px 22px; display:flex; align-items:center; justify-content:space-between; gap:16px}
.brand{display:flex; align-items:center; gap:8px; font-weight:900; font-size:18px; letter-spacing:-.02em; color:var(--ink); text-decoration:none}
.brand__mark{width:20px; height:20px; color:var(--accent); flex:none}
.nav__links{display:flex; align-items:center; gap:20px}
.nav__links a{font-family:"IBM Plex Mono",monospace; font-size:13px; color:var(--soft); text-decoration:none}
.nav__links a:hover{color:var(--ink)}
.nav__cta{background:var(--ink); color:var(--paper); padding:9px 15px; border-radius:999px; font-weight:700; font-size:13.5px; text-decoration:none; font-family:"Pretendard Variable",Pretendard,sans-serif}
@media (max-width:620px){ .nav__links a:not(.nav__cta){display:none} }
.tgl{display:inline-flex; align-items:center; justify-content:center; width:38px; height:38px; border-radius:999px; border:1px solid var(--line2); background:var(--surface); color:var(--ink); cursor:pointer; padding:0; flex:none}
.tgl:hover{background:var(--surface-2)}
.tgl svg{width:19px; height:19px}
.tgl .sun{display:none}
:root[data-theme="dark"] .tgl .moon{display:none}
:root[data-theme="dark"] .tgl .sun{display:block}
:root:not([data-theme="light"]){ @media (prefers-color-scheme: dark){ .tgl .moon{display:none} .tgl .sun{display:block} } }

/* eyebrow */
.eyebrow{font-family:"IBM Plex Mono",monospace; font-size:12px; font-weight:500; letter-spacing:.14em; text-transform:uppercase; color:var(--accent-ink); display:flex; align-items:center; gap:10px; margin:0}
.eyebrow::before{content:""; width:22px; height:2px; background:var(--accent)}

/* blog header */
.bh{padding:60px 0 26px}
.bh h1{font-weight:900; font-size:clamp(30px,5vw,46px); letter-spacing:-.03em; line-height:1.12; margin:16px 0 0; text-wrap:balance}
.bh p{margin:16px 0 0; color:var(--soft); font-size:17px; max-width:56ch}

/* filters */
.filters{display:flex; flex-wrap:wrap; gap:8px; margin:26px 0 4px}
.chip{font-family:"IBM Plex Mono",monospace; font-size:12.5px; color:var(--soft); background:var(--surface); border:1px solid var(--line2); border-radius:999px; padding:7px 14px; cursor:pointer; transition:color .15s ease,background .15s ease,border-color .15s ease}
.chip:hover{color:var(--ink)}
.chip.on{background:var(--accent); border-color:var(--accent); color:var(--on-accent)}
.chip[data-cat="landing"]{--chip-bg:#F0EAFF;--chip-ink:#5D4A9F;--chip-line:#D8CCF8}
.chip[data-cat="log"]{--chip-bg:#E8F2FB;--chip-ink:#245F8A;--chip-line:#C4DDEF}
.chip[data-cat="seo"]{--chip-bg:#DEF3EB;--chip-ink:#067A54;--chip-line:#B7E3D3}
.chip[data-cat="content"]{--chip-bg:#FFF1CF;--chip-ink:#7A5400;--chip-line:#EBD49A}
.chip[data-cat="ops"]{--chip-bg:#E9EEF2;--chip-ink:#425866;--chip-line:#C9D4DB}
.chip[data-cat]:not([data-cat="all"]):not(.on){background:var(--chip-bg);border-color:var(--chip-line);color:var(--chip-ink)}
.chip[data-cat]:not([data-cat="all"]).on{background:var(--chip-ink);border-color:var(--chip-ink);color:#fff}

/* post list */
.posts{display:grid; grid-template-columns:repeat(3,1fr); gap:18px; padding:24px 0 40px}
@media (max-width:860px){ .posts{grid-template-columns:1fr 1fr} }
@media (max-width:560px){ .posts{grid-template-columns:1fr} }
.pcard{--cat-thumb:var(--surface-2);--cat-soft:var(--accent-soft);--cat-ink:var(--accent-ink);--cat-line:var(--line2);display:flex; flex-direction:column; text-decoration:none; color:inherit; background:var(--surface); border:1px solid var(--line); border-radius:16px; overflow:hidden; box-shadow:var(--shadow); transition:transform .15s ease, border-color .15s ease, box-shadow .15s ease}
.pcard[data-cat="landing"]{--cat-thumb:#F0EAFF;--cat-soft:#E9E0FF;--cat-ink:#5D4A9F;--cat-line:#C9B9F3}
.pcard[data-cat="log"]{--cat-thumb:#E8F2FB;--cat-soft:#DCECF8;--cat-ink:#245F8A;--cat-line:#B8D5E9}
.pcard[data-cat="seo"]{--cat-thumb:#E5F4ED;--cat-soft:#DEF3EB;--cat-ink:#067A54;--cat-line:#A9DCC8}
.pcard[data-cat="content"]{--cat-thumb:#FFF1CF;--cat-soft:#FCE8B7;--cat-ink:#7A5400;--cat-line:#E4C777}
.pcard[data-cat="ops"]{--cat-thumb:#E9EEF2;--cat-soft:#DFE7EC;--cat-ink:#425866;--cat-line:#BBC9D2}
.pcard:hover{transform:translateY(-3px); border-color:var(--cat-line); box-shadow:0 2px 4px rgba(13,21,18,.07),0 22px 44px -25px color-mix(in srgb,var(--cat-ink) 38%,transparent)}
.pthumb{position:relative;isolation:isolate;aspect-ratio:16/9; background:var(--cat-thumb); border-bottom:1px solid var(--cat-line);overflow:hidden}
.pthumb svg,.pthumb img{width:100%; height:100%; display:block; object-fit:cover;mix-blend-mode:multiply}
.pcard__body{padding:20px 22px 22px; display:flex; flex-direction:column; flex:1}
.pcard__meta{display:flex; align-items:center; gap:10px; margin-bottom:12px}
.pcat{font-family:"IBM Plex Mono",monospace; font-size:10.5px; color:var(--cat-ink); background:var(--cat-soft); padding:4px 9px; border-radius:6px}
.pdate{font-family:"IBM Plex Mono",monospace; font-size:11px; color:var(--mut)}
.pcard h2{font-weight:800; font-size:19px; letter-spacing:-.02em; margin:0; line-height:1.3}
.pcard p{margin:10px 0 0; color:var(--soft); font-size:14px}
.pcard__more{margin-top:auto; padding-top:14px; font-family:"IBM Plex Mono",monospace; font-size:12px; color:var(--cat-ink)}
.empty{color:var(--mut); font-size:14px; padding:24px 0; text-align:center; display:none; grid-column:1/-1}

/* 도식 썸네일 */
.t-base{stroke:var(--line2); stroke-width:1.5}
.t-area{fill:var(--accent-soft)}
.t-line{fill:none; stroke:var(--accent); stroke-width:2.6; stroke-linecap:round; stroke-linejoin:round}
.t-mut{fill:none; stroke:var(--mut); stroke-width:2.2; stroke-linecap:round; stroke-linejoin:round}
.t-dot{fill:var(--accent)}
.t-bar{fill:var(--accent-soft); stroke:var(--accent); stroke-width:1.6}
.t-bar2{fill:var(--accent)}
.t-lbl{font-family:"IBM Plex Mono",monospace; font-size:13px; fill:var(--mut)}
.t-lbl--a{fill:var(--accent-ink)}
.t-lbl--on{fill:var(--on-accent)}

/* 글 상단 대표 도식 */
.article__thumb{width:100%; max-width:100%; aspect-ratio:16/9; margin-top:26px; border:1px solid var(--line); border-radius:14px; overflow:hidden; background:var(--surface-2)}
.article__thumb svg,.article__thumb img{width:100%; height:100%; display:block; object-fit:cover}

/* article */
.article{padding:44px 0 20px}
.article__back{font-family:"IBM Plex Mono",monospace; font-size:12.5px; color:var(--soft); text-decoration:none; display:inline-flex; gap:6px}
.article__back:hover{color:var(--ink)}
.article__meta{display:flex; align-items:center; gap:10px; margin:24px 0 0}
.article h1{font-weight:900; font-size:clamp(28px,4.6vw,40px); letter-spacing:-.03em; line-height:1.18; margin:14px 0 0; text-wrap:balance}
.prose{margin-top:32px; font-size:16.5px; color:var(--ink)}
.prose > * + *{margin-top:20px}
.prose h2{font-weight:800; font-size:23px; letter-spacing:-.02em; margin-top:40px; line-height:1.32}
.prose h3{font-weight:800; font-size:18px; margin-top:28px}
.prose ul{padding-left:20px; display:grid; gap:9px; margin:0}
.prose strong{font-weight:700}
.prose blockquote{margin:0; padding:16px 20px; border-left:3px solid var(--accent); background:var(--surface-2); border-radius:0 12px 12px 0; color:var(--soft)}
.prose .callout{background:var(--accent-soft); border:1px solid var(--accent); border-radius:14px; padding:18px 20px; color:var(--ink); font-size:15.5px; font-weight:600}
.prose ol{padding-left:24px; display:grid; gap:9px; margin:0}
.article-visual{margin:26px 0 8px; border:1px solid var(--line); border-radius:16px; overflow:hidden; background:var(--surface-2); box-shadow:var(--shadow)}
.article-visual img{width:100%; height:auto; display:block}
.article-visual figcaption{padding:12px 16px; border-top:1px solid var(--line); color:var(--soft); font-size:13.5px; line-height:1.55; background:var(--surface)}
@media (max-width:560px){.article-visual{border-radius:12px}.article-visual figcaption{padding:10px 12px;font-size:12.5px}}

/* end cta */
.endcta{margin:44px 0 0; background:var(--surface); border:1px solid var(--line2); border-radius:18px; padding:30px 28px; box-shadow:var(--shadow); text-align:center}
.endcta h3{font-weight:900; font-size:21px; letter-spacing:-.02em; margin:0}
.endcta p{margin:8px 0 18px; color:var(--soft); font-size:14.5px}
.btn{font-weight:700; font-size:15px; text-decoration:none; padding:13px 22px; border-radius:999px; display:inline-flex; align-items:center; gap:8px; background:var(--accent); color:var(--on-accent); transition:transform .15s ease}
.btn:hover{transform:translateY(-2px)}

/* footer */
footer{border-top:1px solid var(--line); padding:40px 0; margin-top:44px}
.foot{display:flex; flex-wrap:wrap; justify-content:space-between; gap:16px; align-items:center}
.foot .mono{font-size:12.5px; color:var(--mut)}
.foot .mono a{color:inherit}
a:focus-visible,.btn:focus-visible,.chip:focus-visible,.tgl:focus-visible,.pcard:focus-visible{outline:2px solid var(--accent-ink); outline-offset:3px; border-radius:8px}