/* ============================================================
   배관비용 길잡이 — Design System (single source of truth)
   Loaded by both the WordPress theme and the html.php home.
   ============================================================ */
:root{
  /* palette — deep teal (water/trust) + warm sand accent */
  --ink:#16242b; --slate:#51636c; --mute:#78888f;
  --line:#e4eaec; --line-2:#eef3f4; --paper:#f6f9f9; --card:#ffffff;
  --brand:#0e5a6b; --brand-700:#0a4553; --brand-900:#08333d;
  --brand-50:#eaf3f4; --brand-100:#d5e7ea;
  --accent:#c07a35; --accent-600:#a9682a; --accent-50:#f7efe4;
  --ok:#2f7d5b; --warn:#b26a1f;
  /* spacing — 8pt scale */
  --s1:8px; --s2:16px; --s3:24px; --s4:32px; --s5:48px; --s6:64px; --s7:96px; --s8:128px;
  /* radius + shadow + border tokens */
  --r-sm:8px; --r:14px; --r-lg:22px; --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,40,48,.06),0 1px 3px rgba(16,40,48,.05);
  --sh-2:0 6px 20px rgba(12,52,61,.08),0 2px 6px rgba(12,52,61,.05);
  --sh-3:0 18px 48px rgba(10,60,72,.14);
  --bd:1px solid var(--line);
  --maxw:1160px; --readw:760px;
  --t:180ms cubic-bezier(.22,.61,.36,1);
  --font-sans:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,system-ui,"Segoe UI",Roboto,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;
  --font-serif:"Noto Serif KR",Georgia,"Nanum Myeongjo",serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:.001ms!important;transition-duration:.001ms!important}}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-sans);
  font-size:17px;line-height:1.75;letter-spacing:-.01em;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.25;letter-spacing:-.02em;color:var(--ink);font-weight:750}
h1{font-size:clamp(2rem,4.4vw,3.15rem)}
h2{font-size:clamp(1.5rem,3vw,2.05rem)}
h3{font-size:clamp(1.2rem,2.2vw,1.45rem)}
p{margin:0 0 1.1em}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(18px,5vw,32px)}
.eyebrow{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--brand);margin-bottom:14px}
.lede{font-size:1.15rem;color:var(--slate);line-height:1.8;max-width:56ch}
.serif{font-family:var(--font-serif)}
.section{padding-block:clamp(56px,9vw,120px)}
.center{text-align:center}
.muted{color:var(--mute)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;min-height:48px;padding:13px 26px;border-radius:var(--r-pill);
  font-weight:700;font-size:1rem;border:1px solid transparent;cursor:pointer;transition:all var(--t);white-space:nowrap}
.btn svg{width:18px;height:18px;flex:0 0 auto}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-700);transform:translateY(-1px)}
.btn-on-dark{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.28);backdrop-filter:blur(6px)}
.btn-on-dark:hover{background:rgba(255,255,255,.2);color:#fff}

/* ---------- header / nav ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(246,249,249,.82);backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--ink);letter-spacing:-.02em}
.brand:hover{color:var(--ink)}
.brand .mark{width:40px;height:40px;flex:0 0 auto}
.brand .bname{font-size:1.12rem;line-height:1.05}
.brand .bsub{display:block;font-size:.66rem;font-weight:600;letter-spacing:.22em;color:var(--brand);text-transform:uppercase}
.nav-menu{display:flex;gap:4px;margin-left:auto;list-style:none;padding:0;margin-block:0}
.nav-menu a{display:block;padding:9px 15px;border-radius:var(--r-pill);color:var(--slate);font-weight:650;font-size:.97rem}
.nav-menu a:hover{background:var(--brand-50);color:var(--brand-700)}
.nav-cta{margin-left:8px}
.nav-toggle{display:none;margin-left:auto;width:46px;height:46px;border:1px solid var(--line);border-radius:12px;background:#fff;cursor:pointer;align-items:center;justify-content:center}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{content:"";display:block;width:20px;height:2px;background:var(--ink);position:relative;transition:var(--t)}
.nav-toggle span::before{position:absolute;top:-6px}.nav-toggle span::after{position:absolute;top:6px}
@media (max-width:900px){
  .nav-toggle{display:flex}
  .nav-menu{position:fixed;inset:72px 0 auto 0;flex-direction:column;background:#fff;border-bottom:1px solid var(--line);
    padding:12px 18px 20px;gap:2px;box-shadow:var(--sh-2);transform:translateY(-8px);opacity:0;pointer-events:none;transition:var(--t)}
  .nav-menu.open{transform:none;opacity:1;pointer-events:auto}
  .nav-menu a{padding:14px 12px;font-size:1.05rem;border-bottom:1px solid var(--line-2)}
  .nav-cta{margin:10px 0 0}
}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(120% 90% at 85% -10%,rgba(192,122,53,.16),transparent 55%),
  linear-gradient(160deg,var(--brand-900),var(--brand-700) 55%,var(--brand) 100%);color:#eaf4f5}
.hero::after{content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);background-size:22px 22px}
.hero .wrap{position:relative;z-index:2;padding-block:clamp(64px,11vw,132px)}
.hero .eyebrow{color:#8fd0d8}
.hero h1{color:#fff;max-width:16ch}
.hero p.lede{color:#cfe6e9;max-width:52ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:52px;background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.16);border-radius:var(--r-lg);overflow:hidden;max-width:660px}
.hero-stats div{background:rgba(9,45,54,.34);padding:22px 20px}
.hero-stats b{display:block;font-size:1.6rem;font-weight:800;color:#fff;font-family:var(--font-serif);letter-spacing:-.01em}
.hero-stats span{font-size:.9rem;color:#bfdde1}

/* ---------- generic cards / grid ---------- */
.grid{display:grid;gap:24px}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-2{grid-template-columns:repeat(2,1fr)}
@media (max-width:860px){.g-3{grid-template-columns:1fr 1fr}.g-2{grid-template-columns:1fr}}
@media (max-width:560px){.g-3{grid-template-columns:1fr}}
.card{background:var(--card);border:var(--bd);border-radius:var(--r-lg);box-shadow:var(--sh-1);transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--brand-100)}
.feature{padding:30px 28px}
.feature .ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:var(--brand-50);color:var(--brand);margin-bottom:18px}
.feature .ico svg{width:24px;height:24px}
.feature h3{font-size:1.18rem}
.feature p{color:var(--slate);font-size:.98rem;margin:0}

/* ---------- post cards (no-photo cover) ---------- */
.pcard{display:flex;flex-direction:column;overflow:hidden;height:100%}
.pcard a.cover{display:block;aspect-ratio:16/9;position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(150deg,var(--brand-700),var(--brand));isolation:isolate}
.pcard a.cover.v2{background:linear-gradient(150deg,#12414d,#177083)}
.pcard a.cover.v3{background:linear-gradient(150deg,#0a4553,#2b6f7b)}
.pcard a.cover.v4{background:linear-gradient(150deg,#123c45,var(--accent-600))}
.pcard a.cover::before{content:"";position:absolute;inset:0;opacity:.5;
  background-image:radial-gradient(rgba(255,255,255,.09) 1px,transparent 1px);background-size:18px 18px}
.pcard a.cover .ct{position:absolute;left:20px;right:20px;bottom:16px;z-index:2;font-weight:750;font-size:1.06rem;line-height:1.35;
  text-shadow:0 1px 10px rgba(0,0,0,.28);letter-spacing:-.02em}
.pcard a.cover .tag{position:absolute;top:14px;left:14px;z-index:2;font-size:.72rem;font-weight:700;letter-spacing:.04em;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);padding:5px 11px;border-radius:var(--r-pill);backdrop-filter:blur(4px)}
.pcard .pbody{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.pcard .pbody p{color:var(--slate);font-size:.95rem;margin:0 0 16px}
.pcard .more{margin-top:auto;font-weight:700;color:var(--brand);font-size:.94rem;display:inline-flex;align-items:center;gap:6px}
.pcard:hover .more{gap:10px}

/* ---------- cost strip ---------- */
.costgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media (max-width:860px){.costgrid{grid-template-columns:1fr 1fr}}
@media (max-width:460px){.costgrid{grid-template-columns:1fr}}
.costcell{background:#fff;border:var(--bd);border-radius:var(--r);padding:22px 20px}
.costcell .k{font-size:.9rem;color:var(--slate);font-weight:650}
.costcell .v{font-size:1.5rem;font-weight:800;color:var(--brand-700);font-family:var(--font-serif);margin-top:6px}
.costcell .u{font-size:.82rem;color:var(--mute);margin-top:2px}

/* ---------- article ---------- */
.article{background:#fff;border:var(--bd);border-radius:var(--r-lg);box-shadow:var(--sh-1);
  max-width:var(--readw);margin:0 auto;padding:clamp(26px,5vw,56px) clamp(20px,5vw,60px)}
.article-head{max-width:var(--readw);margin:0 auto clamp(20px,4vw,30px)}
.crumbs{font-size:.86rem;color:var(--mute);margin-bottom:14px}
.crumbs a{color:var(--slate)}
.post-meta{display:flex;flex-wrap:wrap;gap:14px;align-items:center;color:var(--mute);font-size:.9rem;margin-top:14px}
.chip{display:inline-block;font-size:.78rem;font-weight:700;color:var(--brand-700);background:var(--brand-50);
  border:1px solid var(--brand-100);padding:5px 12px;border-radius:var(--r-pill)}
.entry{font-size:1.06rem}
.entry>h2{margin-top:2em;padding-top:.2em;font-size:1.55rem;position:relative}
.entry>h2::before{content:"";display:block;width:44px;height:4px;border-radius:3px;background:var(--brand);margin-bottom:16px}
.entry>h3{margin-top:1.6em;font-size:1.2rem;color:var(--brand-700)}
.entry p,.entry li{color:#25343b}
.entry a{text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--brand-100)}
.entry ul,.entry ol{padding-left:1.3em;margin:0 0 1.3em}
.entry li{margin-bottom:.5em}
.entry ul li::marker{color:var(--brand)}
.entry strong{color:var(--brand-900)}

/* summary box */
.pc-summary{background:var(--brand-50);border:1px solid var(--brand-100);border-radius:var(--r);padding:22px 24px;margin:0 0 30px}
.pc-summary h2{font-size:1.05rem;margin:0 0 12px;color:var(--brand-700)}
.pc-summary h2::before{display:none}
.pc-summary ul{margin:0;padding-left:1.2em}
.pc-summary li{margin-bottom:.35em;color:#28383f}

/* TOC */
.pc-toc{border:var(--bd);border-radius:var(--r);padding:18px 22px;margin:0 0 30px;background:#fbfdfd}
.pc-toc strong{display:block;font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;color:var(--mute);margin-bottom:10px}
.pc-toc ol{margin:0;padding-left:1.2em;columns:2;column-gap:28px}
.pc-toc a{color:var(--slate);text-decoration:none;font-size:.96rem}
.pc-toc a:hover{color:var(--brand)}
@media (max-width:560px){.pc-toc ol{columns:1}}

/* tables */
.pc-table{width:100%;border-collapse:separate;border-spacing:0;margin:0 0 1.6em;font-size:.97rem;
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh-1)}
.pc-tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 0 1.6em}
.pc-tablewrap .pc-table{margin:0;min-width:520px}
.pc-table caption{caption-side:top;text-align:left;font-weight:700;color:var(--brand-700);padding:0 0 10px;font-size:.95rem}
.pc-table th,.pc-table td{padding:12px 15px;text-align:left;border-bottom:1px solid var(--line-2);vertical-align:top}
.pc-table thead th{background:var(--brand-700);color:#eaf4f5;font-weight:700;font-size:.9rem;letter-spacing:.01em}
.pc-table tbody tr:nth-child(even){background:#fafcfc}
.pc-table tbody tr:last-child td{border-bottom:0}
.pc-table td .num{font-family:var(--font-serif);font-weight:700;color:var(--brand-700);white-space:nowrap}

/* callout / note */
.pc-callout{display:flex;gap:14px;background:var(--accent-50);border:1px solid #ecd9bf;border-left:4px solid var(--accent);
  border-radius:0 var(--r) var(--r) 0;padding:18px 20px;margin:0 0 1.6em}
.pc-callout .ci{flex:0 0 auto;width:22px;height:22px;color:var(--accent-600);margin-top:2px}
.pc-callout p{margin:0;color:#5c4a30;font-size:.97rem}
.pc-callout.info{background:var(--brand-50);border-color:var(--brand-100);border-left-color:var(--brand)}
.pc-callout.info .ci{color:var(--brand)}
.pc-callout.info p{color:#28454c}
blockquote{margin:0 0 1.6em;padding:18px 24px;border-left:4px solid var(--brand);background:#fbfdfd;
  border-radius:0 var(--r) var(--r) 0;font-family:var(--font-serif);font-size:1.1rem;color:var(--brand-900);line-height:1.7}

/* bar chart */
.pc-bars{margin:0 0 1.6em;border:var(--bd);border-radius:var(--r);padding:22px 24px;background:#fff}
.pc-bars .bt{font-weight:700;color:var(--brand-700);margin-bottom:6px}
.pc-bars .bcap{font-size:.85rem;color:var(--mute);margin-bottom:16px}
.pc-bar{margin-bottom:15px}
.pc-bar:last-child{margin-bottom:0}
.pc-bar .l{display:flex;justify-content:space-between;font-size:.92rem;margin-bottom:6px}
.pc-bar .l b{color:var(--brand-700);font-family:var(--font-serif)}
.pc-bar .track{height:12px;background:var(--brand-50);border-radius:var(--r-pill);overflow:hidden}
.pc-bar .fill{height:100%;border-radius:var(--r-pill);background:linear-gradient(90deg,var(--brand),#2b8090)}
.pc-bar .fill.a{background:linear-gradient(90deg,var(--accent),#d69a58)}

/* steps / timeline */
.pc-steps{list-style:none;counter-reset:st;padding:0;margin:0 0 1.6em}
.pc-steps li{counter-increment:st;position:relative;padding:0 0 20px 54px;border-left:2px solid var(--brand-100);margin-left:16px}
.pc-steps li:last-child{border-left-color:transparent;padding-bottom:0}
.pc-steps li::before{content:counter(st);position:absolute;left:-17px;top:-3px;width:32px;height:32px;border-radius:50%;
  background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800;font-size:.92rem;font-family:var(--font-serif)}
.pc-steps li b{display:block;color:var(--brand-900);margin-bottom:2px}

/* faq */
.pc-faq{border:var(--bd);border-radius:var(--r);overflow:hidden;margin:0 0 1.6em}
.pc-faq details{border-bottom:1px solid var(--line-2)}
.pc-faq details:last-child{border-bottom:0}
.pc-faq summary{cursor:pointer;padding:16px 20px;font-weight:700;color:var(--brand-900);list-style:none;display:flex;justify-content:space-between;gap:12px;align-items:center}
.pc-faq summary::-webkit-details-marker{display:none}
.pc-faq summary::after{content:"";width:10px;height:10px;border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:rotate(45deg);transition:var(--t);flex:0 0 auto}
.pc-faq details[open] summary::after{transform:rotate(-135deg)}
.pc-faq .fa{padding:0 20px 18px;color:#33454c;font-size:.98rem}
.pc-faq .fa p{margin:0}

/* source list + notices */
.pc-src{font-size:.92rem;color:var(--slate);background:#fbfdfd;border:var(--bd);border-radius:var(--r);padding:16px 20px;margin:1.6em 0 0}
.pc-src strong{color:var(--brand-700)}
.ai-notice{font-size:0.85em;color:#888;margin-top:2em}
.legal-notice{font-size:0.85em;color:#777;background:#f8f9fa;border-left:3px solid #cbd5e1;padding:10px 14px;margin-top:2em;border-radius:0 6px 6px 0}

/* related */
.related{max-width:var(--readw);margin:40px auto 0}
.related h2{font-size:1.25rem}

/* ---------- finance tool ---------- */
.fin{background:#fff;border:var(--bd);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:clamp(22px,4vw,34px)}
.fin .fbar{display:flex;gap:10px;flex-wrap:wrap}
.fin input[type=search]{flex:1;min-width:220px;min-height:50px;padding:13px 18px;border:1px solid var(--line);border-radius:var(--r-pill);
  font-size:1rem;font-family:inherit;background:var(--paper);transition:var(--t)}
.fin input[type=search]:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px var(--brand-50)}
.fin .hint{font-size:.88rem;color:var(--mute);margin:12px 0 0}
.fin-results{margin-top:22px;display:grid;gap:10px}
.fin-row{display:flex;justify-content:space-between;align-items:center;gap:12px;border:var(--bd);border-radius:var(--r);padding:14px 18px;background:#fbfdfd;transition:var(--t)}
.fin-row:hover{border-color:var(--brand-100);background:var(--brand-50)}
.fin-row .nm{font-weight:700;color:var(--brand-900)}
.fin-row .sub{font-size:.84rem;color:var(--mute)}
.fin-row button{min-height:40px;padding:8px 16px;border-radius:var(--r-pill);border:1px solid var(--brand);background:#fff;color:var(--brand);font-weight:700;cursor:pointer;transition:var(--t)}
.fin-row button:hover{background:var(--brand);color:#fff}
.fin-detail{margin-top:22px;border-top:1px solid var(--line);padding-top:22px}
.fin-detail h3{font-size:1.3rem;margin-bottom:4px}
.fin-detail .meta{color:var(--slate);font-size:.92rem;margin-bottom:18px}
.fin-ratio{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:20px}
@media (max-width:640px){.fin-ratio{grid-template-columns:1fr 1fr}}
.fin-ratio .rc{border:var(--bd);border-radius:var(--r);padding:14px;background:#fbfdfd}
.fin-ratio .rc .k{font-size:.82rem;color:var(--slate)}
.fin-ratio .rc .v{font-size:1.3rem;font-weight:800;color:var(--brand-700);font-family:var(--font-serif);margin-top:4px}
.fin-msg{color:var(--slate);padding:14px 0}
.fin-spin{display:inline-block;width:18px;height:18px;border:2px solid var(--brand-100);border-top-color:var(--brand);border-radius:50%;animation:fspin .7s linear infinite;vertical-align:-3px;margin-right:8px}
@keyframes fspin{to{transform:rotate(360deg)}}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-900);color:#bcd6da;margin-top:clamp(56px,9vw,110px);padding-block:56px 30px}
.site-footer a{color:#cfe6e9}
.site-footer a:hover{color:#fff}
.foot-top{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:36px}
@media (max-width:760px){.foot-top{grid-template-columns:1fr;gap:26px}}
.foot-brand .brand .bname{color:#fff}
.foot-brand p{color:#9cc1c6;font-size:.95rem;margin:16px 0 0;max-width:38ch}
.foot-col h4{color:#fff;font-size:.86rem;letter-spacing:.08em;text-transform:uppercase;margin:0 0 14px}
.foot-col ul{list-style:none;padding:0;margin:0}
.foot-col li{margin-bottom:9px}
.foot-col a{font-size:.96rem}
.foot-legal{border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:22px;font-size:.82rem;color:#8fb3b9;line-height:1.7}
.foot-legal .lg{background:rgba(255,255,255,.04);border-left:3px solid rgba(255,255,255,.18);padding:12px 16px;border-radius:0 8px 8px 0;margin-bottom:16px}
.foot-legal .cp{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s cubic-bezier(.22,.61,.36,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}

/* carousel */
.carousel{position:relative}
.carousel-track{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(300px,340px);gap:22px;overflow-x:auto;
  scroll-snap-type:x mandatory;padding:6px 2px 18px;-webkit-overflow-scrolling:touch;scrollbar-width:thin}
.carousel-track>*{scroll-snap-align:start}
.carousel-track::-webkit-scrollbar{height:8px}
.carousel-track::-webkit-scrollbar-thumb{background:var(--brand-100);border-radius:99px}
.carousel-nav{display:flex;gap:10px;justify-content:flex-end;margin-top:6px}
.carousel-nav button{width:46px;height:46px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--brand);cursor:pointer;transition:var(--t);display:grid;place-items:center}
.carousel-nav button:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.carousel-nav button svg{width:18px;height:18px}

.section-head{max-width:640px;margin-bottom:38px}
.section-head.center{margin-inline:auto}