:root{
  --bg:#fafaf7;--fg:#1c1c1a;--muted:#6b6b66;--line:#e6e4dd;--card:#fff;
  --accent:#0e7c66;--accent-2:#e8f5f1;--on-accent:#fff;--warn:#b45309;--warn-bg:#fff7ed;
  --maxw:1120px;--radius:12px;--font:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Pretendard","Noto Sans KR","Malgun Gothic",sans-serif;
  color-scheme:light;
}
/* 다크 토큰: OS 설정(사용자가 명시적으로 light를 고르지 않은 경우) 또는 data-theme="dark" */
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#121412;--fg:#ececea;--muted:#b8b8b2;--line:#2a2d2a;--card:#1b1e1b;--accent:#3ec1a1;--accent-2:#16302a;--on-accent:#0b1f1a;--warn:#f59e0b;--warn-bg:#2a1f0e;color-scheme:dark}}
:root[data-theme="dark"]{--bg:#121412;--fg:#ececea;--muted:#b8b8b2;--line:#2a2d2a;--card:#1b1e1b;--accent:#3ec1a1;--accent-2:#16302a;--on-accent:#0b1f1a;--warn:#f59e0b;--warn-bg:#2a1f0e;color-scheme:dark}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--fg);line-height:1.7;font-size:16px;word-break:keep-all}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:99}

/* header */
.site-header{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.site-header .wrap{display:flex;align-items:center;gap:16px;height:56px}
.logo{font-weight:800;font-size:1.15rem;color:var(--fg);display:flex;align-items:center;gap:6px;white-space:nowrap}
.logo-mark{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:8px;background:var(--accent);color:var(--on-accent);font-size:.95rem;font-weight:800}
.nav{display:flex;gap:4px;overflow-x:auto;flex:1;scrollbar-width:none}.nav::-webkit-scrollbar{display:none}
.nav a{padding:6px 10px;border-radius:8px;color:var(--fg);font-size:.95rem;white-space:nowrap}
.nav a.on,.nav a:hover{background:var(--accent-2);color:var(--fg);font-weight:700;text-decoration:none}
.search-btn,.theme-btn{border:0;background:none;font-size:1.1rem;cursor:pointer;padding:6px;line-height:1;color:var(--fg)}
.theme-btn{border:1px solid var(--line);border-radius:99px;width:34px;height:34px;display:grid;place-items:center;font-size:.95rem}
.theme-btn:hover{background:var(--accent-2)}
.search-panel{background:var(--card);border-bottom:1px solid var(--line)}
.search-panel .wrap{padding:12px 16px}
#searchInput{width:100%;font-size:1rem;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg)}
#searchResults{list-style:none;padding:0;margin:8px 0 0}#searchResults li a{display:block;padding:6px 4px}

/* layout */
main{padding:20px 16px 48px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px}
.layout-wide,.layout-narrow{display:block}.layout-narrow{max-width:760px}
@media (max-width:900px){.layout{grid-template-columns:minmax(0,1fr);gap:24px}.side .sticky{position:static}}
.article,.side,.body{min-width:0;max-width:100%}
.side .sticky{position:sticky;top:72px}
.side h3{font-size:1rem;margin:20px 0 8px}
.rel{list-style:none;padding:0;margin:0}.rel li{padding:6px 0;border-bottom:1px dashed var(--line);font-size:.95rem}

/* article */
.crumb{font-size:.85rem;color:var(--muted);margin-bottom:6px}
.article h1{font-size:1.75rem;line-height:1.3;margin:4px 0 8px;letter-spacing:-.01em}
@media (max-width:600px){.article h1{font-size:1.45rem}}
.meta{color:var(--muted);font-size:.85rem;margin:0 0 12px}
.badge{display:inline-block;background:var(--accent);color:var(--on-accent);font-size:.78rem;padding:3px 10px;border-radius:99px;margin-right:6px;vertical-align:middle;font-weight:800;letter-spacing:.01em}
.lead{font-size:1.05rem;color:var(--muted);border-left:3px solid var(--accent);padding-left:12px;margin:0 0 16px}
.toc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:10px 16px;margin:16px 0;font-size:.93rem}
.toc summary{cursor:pointer;font-weight:700}.toc ul{margin:6px 0 0;padding-left:18px}
.body h2{font-size:1.35rem;margin:36px 0 12px;padding-top:8px;border-top:1px solid var(--line)}
.body h3{font-size:1.1rem;margin:24px 0 8px}
.body p,.body li{font-size:1rem}
.body table{border-collapse:collapse;width:100%;max-width:100%;font-size:.93rem;margin:12px 0;display:block;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}
.body th,.body td{border:1px solid var(--line);padding:8px 10px;text-align:left}
.body th{background:var(--accent-2);color:var(--fg);font-weight:700}
.body blockquote{margin:12px 0;padding:10px 14px;background:var(--warn-bg);border-left:3px solid var(--warn);border-radius:6px}
.body code{background:var(--accent-2);color:var(--fg);padding:1px 5px;border-radius:4px;font-size:.9em}
.note{background:var(--accent-2);border-radius:var(--radius);padding:12px 16px;margin:14px 0;color:var(--fg)}
.faq details,.sources{margin-top:24px}
.faq details{border:1px solid var(--line);border-radius:8px;padding:8px 14px;margin:8px 0;background:var(--card)}
.faq summary{font-weight:600;cursor:pointer}
.sources ul{font-size:.9rem;color:var(--muted)}
.disclaimer{font-size:.8rem;color:var(--muted);margin-top:24px}
.btn-share{width:100%;margin-top:16px;padding:10px;border:1px solid var(--line);background:var(--card);border-radius:8px;cursor:pointer;font-size:.95rem;color:var(--fg)}

/* calculator */
.calc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin:16px 0;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.calc h3{margin:0 0 12px;font-size:1.05rem}
.calc .row{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:10px}
@media (max-width:520px){.calc .row{grid-template-columns:1fr}}
.calc label{display:flex;flex-direction:column;font-size:.88rem;color:var(--muted);gap:4px}
.calc input,.calc select{font-size:1.05rem;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg);width:100%}
.calc input:focus{outline:2px solid var(--accent);border-color:transparent}
.calc .btn{background:var(--accent);color:var(--on-accent);border:0;padding:12px 18px;border-radius:8px;font-size:1rem;font-weight:700;cursor:pointer;width:100%;margin-top:6px}
.calc .result{margin-top:14px;padding:14px;background:var(--accent-2);border-radius:8px;font-size:.98rem;color:var(--fg)}
.calc .result .hint,.calc .result td,.calc .result p{color:var(--fg);opacity:.92}
.calc .result strong.big{font-size:1.5rem;display:block;color:var(--accent);margin-bottom:6px;filter:none}
.calc .result table{width:100%;border-collapse:collapse;font-size:.9rem;margin-top:8px;display:table;white-space:normal}
.calc .result td{padding:4px 0;border-bottom:1px dashed color-mix(in srgb,var(--fg) 25%,transparent)}.calc .result td:last-child{text-align:right;font-variant-numeric:tabular-nums}
.calc .hint{font-size:.82rem;color:var(--muted);margin-top:8px}

/* ads */
.ad{margin:20px 0;text-align:center}
.ad-placeholder{min-height:100px;border:1px dashed var(--line);border-radius:8px;display:grid;place-items:center;color:var(--muted);font-size:.75rem;background:var(--card)}
.ad-sidebar.ad-placeholder{min-height:250px}
.ad-in_article.ad-placeholder{min-height:250px}
@media (min-width:900px){.ad-top.ad-placeholder{min-height:90px}}

/* home */
.hero{padding:28px 0 8px}.hero h1{font-size:1.8rem;margin:0 0 6px}.hero p{color:var(--muted);margin:0}
@media (max-width:600px){.hero h1{font-size:1.4rem}}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.card{display:flex;flex-direction:column;gap:6px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;color:var(--fg);transition:transform .12s}
.card:hover{transform:translateY(-2px);text-decoration:none;border-color:var(--accent)}
.card strong{font-size:1.02rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.card span{font-size:.86rem;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.card .badge{display:inline-block;-webkit-line-clamp:unset;color:var(--on-accent);font-size:.78rem;font-weight:800;overflow:visible}
.card .badge{align-self:flex-start}
.tools-grid h2,.cat-block h2{font-size:1.25rem;margin:28px 0 10px}
.cat-desc{color:var(--muted);margin:0 0 10px;font-size:.92rem}
.list{list-style:none;padding:0;margin:0}
.list li{padding:10px 0;border-bottom:1px solid var(--line)}
.list li a{font-weight:600;font-size:1.02rem}
.list .d{display:block;color:var(--muted);font-size:.88rem}
.list time{font-size:.78rem;color:var(--muted)}
.cat-head{padding:16px 0 4px}.cat-head h1{margin:4px 0}

/* game */
.game-frame{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:12px 0}
.game-frame iframe{width:100%;height:560px;border:0;display:block}
@media (max-width:600px){.game-frame iframe{height:520px}}
.game-links{text-align:right;font-size:.85rem;margin:0;padding:6px 12px;border-top:1px solid var(--line)}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:24px 0 40px;color:var(--muted);font-size:.85rem;background:var(--card)}
.foot-links a{color:var(--fg)}.foot-note{max-width:760px}