:root{
  --bg:#F5F7F7;
  --bg-dim:#E8EEEE;
  --ink:#152322;
  --ink-soft:#3A4A49;
  --muted:#7C8B8A;
  --teal:#0B7A75;
  --teal-dim:#DCEEEC;
  --amber:#E8813F;
  --line:rgba(21,35,34,0.10);
  --radius:16px;
  --font-body:'Pretendard', sans-serif;
}
*{box-sizing:border-box;}
html, body{
  margin:0; padding:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.7;
  word-break:keep-all;
  overflow-wrap:break-word;
}
body{
  background-image:
    radial-gradient(ellipse 560px 380px at 8% -8%, rgba(11,122,117,0.10), transparent 60%),
    radial-gradient(ellipse 560px 380px at 100% 6%, rgba(232,129,63,0.08), transparent 60%);
}
a{color:inherit;}

/* ==== 헤더 ==== */
.site-header{
  display:flex; align-items:center; justify-content:space-between;
  max-width:880px; margin:0 auto; padding:20px 20px 8px;
}
.logo{
  font-size:19px; font-weight:900; letter-spacing:-0.01em;
  text-decoration:none; color:var(--ink);
  display:flex; align-items:center; gap:8px;
}
.logo span{color:var(--teal);}
.nav-family-link{
  display:inline-flex; align-items:center; gap:5px;
  font-size:12.5px; font-weight:600; color:var(--ink-soft);
  background:var(--teal-dim); border:1px solid var(--line);
  border-radius:999px; padding:6px 12px; text-decoration:none;
  transition:border-color 0.2s;
}
.nav-family-link:hover{border-color:var(--teal);}
.back-link{
  display:inline-flex; align-items:center; gap:5px;
  font-size:13px; font-weight:700; color:var(--teal);
  text-decoration:none; margin:14px 0 4px;
}
.back-link:hover{text-decoration:underline;}

.wrap{max-width:880px; margin:0 auto; padding:0 20px;}

/* ==== 히어로 ==== */
.hero{padding:36px 0 10px;}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:12px; font-weight:700; letter-spacing:0.12em;
  color:var(--amber); text-transform:uppercase; margin-bottom:14px;
}
.eyebrow::before{content:''; width:16px; height:1.5px; background:var(--amber);}
.hero h1{
  font-size:clamp(26px, 5.6vw, 40px); font-weight:900; letter-spacing:-0.02em;
  line-height:1.35; max-width:600px;
}
.hero h1 .accent{
  background:linear-gradient(100deg, var(--teal), var(--amber) 65%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero p{margin-top:14px; font-size:14.5px; color:var(--ink-soft); max-width:56ch;}

/* ==== 변환기 카드 그리드 (허브) ==== */
.tool-grid{
  display:grid; grid-template-columns:1fr 1fr;
  gap:12px; padding:26px 0 10px;
}
@media(max-width:600px){ .tool-grid{grid-template-columns:1fr;} }
.tool-card{
  display:flex; align-items:center; gap:14px;
  text-decoration:none; color:inherit;
  background:#fff; border:1px solid var(--line); border-radius:14px;
  padding:16px 18px; transition:transform 0.2s cubic-bezier(.2,.8,.2,1), box-shadow 0.2s;
}
.tool-card:hover{transform:translateY(-3px); box-shadow:0 14px 26px -14px rgba(21,35,34,0.2);}
.tool-card .emoji{font-size:26px; flex:0 0 auto;}
.tool-card h2{font-size:15.5px; font-weight:800; margin-bottom:2px;}
.tool-card p{font-size:12.5px; color:var(--muted);}

/* ==== 변환기 실행 화면 ==== */
.converter-card{
  background:#fff; border:1px solid var(--line); border-radius:20px;
  padding:26px 24px; margin:20px 0;
}
.converter-row{
  display:flex; align-items:center; gap:12px; margin-bottom:14px;
}
.converter-field{flex:1;}
.converter-field label{font-size:12px; font-weight:700; color:var(--muted); display:block; margin-bottom:6px;}
.converter-field input, .converter-field select{
  width:100%; padding:13px 14px; border:1.5px solid var(--line); border-radius:12px;
  font-size:18px; font-weight:700; background:var(--bg); color:var(--ink); font-family:inherit;
}
.converter-field select{font-size:14px; font-weight:600;}
.converter-field input:focus, .converter-field select:focus{outline:2px solid var(--teal); outline-offset:1px;}
.swap-btn{
  flex:0 0 auto; width:40px; height:40px; border-radius:50%;
  border:1.5px solid var(--line); background:#fff; color:var(--teal);
  font-size:16px; cursor:pointer; margin-top:20px;
  transition:background 0.2s, transform 0.2s;
}
.swap-btn:hover{background:var(--teal-dim); transform:rotate(180deg);}

.quick-table{
  margin-top:18px; border-top:1px solid var(--line); padding-top:16px;
}
.quick-table h3{font-size:13px; font-weight:800; color:var(--teal); margin-bottom:10px;}
.quick-table table{width:100%; border-collapse:collapse; font-size:13.5px;}
.quick-table td{padding:7px 4px; border-bottom:1px solid var(--bg-dim);}
.quick-table td:last-child{text-align:right; font-weight:700;}

.result-box{
  background:var(--teal-dim); border-radius:12px; padding:14px 16px;
  font-size:13.5px; color:var(--ink-soft); margin-top:10px;
}

/* ==== 광고/쿠팡 자리 ==== */
.ad-slot{
  margin:20px auto; max-width:880px; min-height:100px;
  display:flex; align-items:center; justify-content:center; padding:16px;
  border:1.5px dashed var(--line); border-radius:var(--radius);
  background:repeating-linear-gradient(45deg, rgba(21,35,34,0.02), rgba(21,35,34,0.02) 10px, transparent 10px, transparent 20px);
  color:var(--muted); font-size:12px;
}
.ad-slot-tag{font-size:10px; font-weight:700; letter-spacing:0.08em; opacity:0.7;}
.ad-slot-bottom{min-height:250px;}
.coupang-slot{max-width:100%; overflow-x:auto; margin:16px auto; text-align:center;}
.coupang-notice{font-size:11px; color:var(--muted); text-align:center; margin-bottom:6px;}

/* ==== 푸터 ==== */
.site-footer{
  max-width:880px; margin:20px auto 0; padding:24px 20px 40px;
  border-top:1px solid var(--line); font-size:12px; color:var(--muted);
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
}
.site-footer nav{display:flex; gap:16px;}
.site-footer a{text-decoration:none; font-weight:600; color:var(--ink-soft);}
.site-footer a:hover{color:var(--teal);}