:root{
  --paper:#F3EEE1;
  --paper-raised:#EAE3D0;
  --ink:#232E27;
  --ink-soft:#5B6459;
  --pine:#2F4C3E;
  --pine-strong:#1F332A;
  --brass:#9C7A2E;
  --brass-bright:#B5924A;
  --rule:#CDC2A2;
  --rule-soft:#DDD4BA;
  --serif: Georgia, "Times New Roman", serif;
  --sans: "Malgun Gothic", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  --mono: "D2Coding", "Consolas", ui-monospace, "SFMono-Regular", monospace;
}
:root[data-theme="dark"]{
  --paper:#1B211D;
  --paper-raised:#232B25;
  --ink:#EAE4D2;
  --ink-soft:#A8A794;
  --pine:#8AB39A;
  --pine-strong:#A9CBB4;
  --brass:#D2AE64;
  --brass-bright:#E2C27E;
  --rule:#3B4438;
  --rule-soft:#2C332B;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#1B211D;
    --paper-raised:#232B25;
    --ink:#EAE4D2;
    --ink-soft:#A8A794;
    --pine:#8AB39A;
    --pine-strong:#A9CBB4;
    --brass:#D2AE64;
    --brass-bright:#E2C27E;
    --rule:#3B4438;
    --rule-soft:#2C332B;
  }
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;}
::selection{background:var(--brass);color:var(--paper);}

.sheet{
  max-width:760px;
  margin:0 auto;
  padding:0 28px 120px;
  position:relative;
}
.spine{
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:1px;
  background:var(--rule);
  display:none;
}
@media (min-width:820px){
  .sheet{padding:0 0 140px;}
  .spine{display:block; left:-40px;}
}

/* header */
header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:26px 0;
  border-bottom:1px solid var(--rule);
  gap:16px;
  flex-wrap:wrap;
}
.brandmark{display:flex;align-items:center;gap:12px; text-decoration:none;}
.brandmark svg{width:40px;height:40px;flex:none;}
.brandmark .word{
  font-family:var(--serif);
  font-size:1.05rem;
  letter-spacing:.02em;
  color:var(--ink);
}
.brandmark .word b{font-weight:700;color:var(--pine);}
nav{display:flex;gap:22px;flex-wrap:wrap;}
nav a{
  font-size:.82rem;
  text-decoration:none;
  color:var(--ink-soft);
  letter-spacing:.03em;
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:color .15s, border-color .15s;
}
nav a:hover, nav a:focus-visible{color:var(--pine-strong);border-color:var(--brass);outline:none;}
nav a.current{color:var(--pine-strong); border-color:var(--brass);}

/* cover / hero */
.cover{padding:64px 0 48px;}
.eyebrow{
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--brass);
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:22px;
}
.eyebrow::before{
  content:"";
  width:26px;height:1px;
  background:var(--brass);
  display:inline-block;
}
h1{
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(2.1rem, 5vw, 3.1rem);
  line-height:1.28;
  margin:0 0 20px;
  text-wrap:balance;
  color:var(--ink);
}
h1 em{
  font-style:normal;
  color:var(--pine-strong);
  border-bottom:2px solid var(--brass);
}
.lede{
  font-size:1.05rem;
  color:var(--ink-soft);
  max-width:56ch;
  margin:0 0 30px;
}
.vitals{
  display:flex;
  align-items:center;
  gap:14px;
  margin-top:36px;
}
.vitals svg{width:100%;max-width:340px;height:34px;display:block;}
.vitals span{
  font-family:var(--mono);
  font-size:.72rem;
  color:var(--ink-soft);
  white-space:nowrap;
}

/* section framework */
section.entry{
  padding:48px 0;
  border-bottom:1px solid var(--rule);
}
section.entry:last-of-type{border-bottom:none;}
.entry-head{
  display:flex;
  align-items:baseline;
  gap:14px;
  margin-bottom:22px;
}
.entry-code{
  font-family:var(--mono);
  font-size:.74rem;
  color:var(--brass);
  letter-spacing:.06em;
  flex:none;
}
.entry-title{
  font-family:var(--serif);
  font-size:1.5rem;
  font-weight:400;
  color:var(--ink);
  margin:0;
}

.principles{
  list-style:none;
  margin:26px 0 0;
  padding:0;
  display:grid;
  gap:12px;
}
.principles li{
  display:flex;
  gap:14px;
  font-size:.92rem;
  color:var(--ink-soft);
  align-items:baseline;
}
.principles li::before{
  content:"—";
  color:var(--brass);
  flex:none;
}
.principles b{color:var(--ink);font-weight:600;}

/* category index */
.index-list{
  display:flex;
  flex-direction:column;
}
.index-row{
  display:grid;
  grid-template-columns:64px 1fr;
  gap:18px;
  padding:18px 0;
  border-top:1px solid var(--rule-soft);
  align-items:baseline;
  text-decoration:none;
  color:inherit;
}
.index-row:first-child{border-top:none;}
.index-row .code{
  font-family:var(--mono);
  font-size:.78rem;
  color:var(--brass);
  padding-top:3px;
}
.index-row .label{
  font-family:var(--serif);
  font-size:1.18rem;
  color:var(--ink);
  margin:0 0 4px;
}
.index-row .desc{
  font-size:.88rem;
  color:var(--ink-soft);
  margin:0;
}
.index-row:hover .label{color:var(--pine-strong);}

.post-list{
  display:flex;
  flex-direction:column;
}
.post-row{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  gap:16px;
  padding:16px 0;
  border-top:1px solid var(--rule-soft);
  text-decoration:none;
  color:inherit;
}
.post-row:first-child{border-top:none;}
.post-row .post-main{display:flex; align-items:baseline; gap:12px; min-width:0;}
.post-row .post-tag{
  font-family:var(--mono);
  font-size:.7rem;
  color:var(--brass);
  border:1px solid var(--rule);
  border-radius:4px;
  padding:2px 7px;
  flex:none;
}
.post-row .post-title{
  font-family:var(--serif);
  font-size:1.02rem;
  color:var(--ink);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.post-row .post-arrow{
  font-family:var(--mono);
  font-size:.8rem;
  color:var(--ink-soft);
  flex:none;
}
.post-row:hover .post-title{color:var(--pine-strong);}

/* empty-category note */
.empty-note{
  font-size:.92rem;
  color:var(--ink-soft);
  background:var(--paper-raised);
  border-radius:8px;
  padding:16px 18px;
}

/* article body (post pages) */
article.body-copy{font-size:1rem; color:var(--ink);}
article.body-copy h2{
  font-family:var(--serif); font-weight:400; font-size:1.3rem;
  border-bottom:1px solid var(--rule); padding-bottom:8px; margin-top:38px; color:var(--ink);
}
article.body-copy h3{font-size:1.02rem; font-weight:700; margin-top:22px; color:var(--pine);}
article.body-copy p{margin:0 0 16px;}
article.body-copy ul, article.body-copy ol{padding-left:22px; margin:0 0 16px;}
article.body-copy li{margin:6px 0;}
.summary-box{background:var(--paper-raised); border-left:4px solid var(--pine); border-radius:6px; padding:18px 20px; margin:20px 0;}
.toc-box{background:var(--paper-raised); border-radius:10px; padding:18px 20px; margin:20px 0;}
.toc-box ul{margin:8px 0 0; padding-left:20px;}
article.body-copy table{width:100%; border-collapse:collapse; margin:18px 0; font-size:.92rem;}
article.body-copy th, article.body-copy td{border:1px solid var(--rule-soft); padding:10px 12px; text-align:left;}
article.body-copy th{background:var(--paper-raised); color:var(--ink);}
article.body-copy tr.highlight td{background:#FBF6E9; font-weight:bold;}
.faq-item{margin:14px 0;}
.faq-q{font-weight:700; color:var(--pine);}
figure.post-figure{margin:18px 0;}
figure.post-figure img{width:100%; height:auto; border-radius:8px; display:block;}
figure.post-figure figcaption{font-size:.78rem; color:var(--ink-soft); margin-top:6px;}
.post-meta{font-family:var(--mono); font-size:.75rem; color:var(--ink-soft); margin:-6px 0 24px;}
.tags{color:var(--ink-soft); font-size:.88rem; margin-top:24px;}

/* affiliate product card */
.product-card{
  display:flex; gap:16px; align-items:flex-start;
  background:var(--paper-raised); border:1px solid var(--rule-soft); border-radius:10px;
  padding:16px; margin:16px 0;
}
.product-card .thumb{
  width:88px; height:88px; flex:none; border-radius:8px;
  background:repeating-linear-gradient(45deg, var(--rule-soft), var(--rule-soft) 8px, var(--paper) 8px, var(--paper) 16px);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--mono); font-size:.65rem; color:var(--ink-soft); text-align:center; padding:4px;
}
.product-card .info{min-width:0;}
.product-card .name{font-family:var(--serif); font-size:1.02rem; color:var(--ink); margin:0 0 4px;}
.product-card .desc{font-size:.85rem; color:var(--ink-soft); margin:0 0 8px;}
.product-card .buy-link{
  display:inline-block; font-size:.82rem; font-weight:700; color:var(--brass);
  border:1px solid var(--rule); border-radius:6px; padding:5px 12px; text-decoration:none;
}
.product-card .pending{font-family:var(--mono); font-size:.68rem; color:var(--brass); letter-spacing:.03em;}
.affiliate-disclosure{
  font-size:.78rem; color:var(--ink-soft); background:var(--paper-raised);
  border-radius:6px; padding:10px 14px; margin:20px 0;
}

footer{
  padding:40px 0 0;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
}
footer .brandmark svg{width:26px;height:26px;}
footer .word{font-size:.85rem;}
footer .note{
  font-family:var(--mono);
  font-size:.7rem;
  color:var(--ink-soft);
  letter-spacing:.03em;
}

@media (prefers-reduced-motion: no-preference){
  .cover h1, .lede, .eyebrow, .vitals{
    animation:rise .7s ease both;
  }
  .lede{animation-delay:.08s;}
  .vitals{animation-delay:.16s;}
  @keyframes rise{
    from{opacity:0; transform:translateY(10px);}
    to{opacity:1; transform:translateY(0);}
  }
}