/* Layout: 상하이 지하철 노선도 콘셉트 — 가이드 = 역, 주제 색 = 실제 노선 색. 본문 1단, 68자 폭 */
:root{
  --paper:#F4F6F7; --card:#FFFFFF; --ink:#11212C; --muted:#56666F; --rule:#D6DEE2;
  --river:#1C6A86; --river-soft:#E3EEF2; --glow:#F0A23B;
  --sky-top:#F7D9B5; --sky-bot:#F3EDE4; --bldg-far:#B9C6CC; --bldg-mid:#7F929C; --bldg-near:#2E4350; --water:#9DB8C3; --win:#FFE7B0;
  --l1:#E3002B; --l2:#78B51A; --l4:#5B2C8F; --l8:#0090C8; --l10:#9C7DB0; --l11:#871C2B; --l17:#B0705F;
  --f-display:"Black Han Sans","IBM Plex Sans KR","Apple SD Gothic Neo","Malgun Gothic",sans-serif;
  --f-body:"IBM Plex Sans KR","Apple SD Gothic Neo","Malgun Gothic","Noto Sans KR",sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --paper:#0D1820; --card:#13222D; --ink:#E5EDF1; --muted:#98A9B2; --rule:#233540;
  --river:#62B6D3; --river-soft:#16303C; --glow:#F5B65C;
  --sky-top:#0B1B33; --sky-bot:#1E2F45; --bldg-far:#1F3242; --bldg-mid:#2A4253; --bldg-near:#06111A; --water:#10283A; --win:#F7C86A;
  color-scheme:dark;
}}
:root[data-theme="dark"]{
  --paper:#0D1820; --card:#13222D; --ink:#E5EDF1; --muted:#98A9B2; --rule:#233540;
  --river:#62B6D3; --river-soft:#16303C; --glow:#F5B65C;
  --sky-top:#0B1B33; --sky-bot:#1E2F45; --bldg-far:#1F3242; --bldg-mid:#2A4253; --bldg-near:#06111A; --water:#10283A; --win:#F7C86A;
  color-scheme:dark;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:17px;line-height:1.75;word-break:keep-all;overflow-wrap:anywhere}
a{color:var(--river);text-underline-offset:3px}
a:focus-visible,summary:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--glow);outline-offset:2px;border-radius:4px}
img,svg{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.narrow{max-width:760px}

/* header */
.site-head{border-bottom:1px solid var(--rule);background:var(--paper);position:sticky;top:env(safe-area-inset-top,0px);z-index:5}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-block:12px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-family:var(--f-display);font-size:1.3rem;letter-spacing:.01em}
.brand svg{width:30px;height:30px;flex:none}
.head-cta{font-size:.88rem;font-weight:600;text-decoration:none;color:var(--ink);border:1.5px solid var(--ink);border-radius:999px;padding:6px 14px;white-space:nowrap}
.head-cta:hover{background:var(--ink);color:var(--paper)}

/* line badges */
.line{--c:var(--l1);display:inline-flex;align-items:center;gap:8px;font-size:.82rem;font-weight:700;letter-spacing:.04em;color:var(--ink)}
.line b{display:inline-grid;place-items:center;min-width:34px;height:34px;padding:0 6px;border-radius:999px;background:var(--c);color:#fff;font-family:var(--f-mono);font-size:.95rem}
.line.l1{--c:var(--l1)} .line.l2{--c:var(--l2)} .line.l4{--c:var(--l4)} .line.l8{--c:var(--l8)} .line.l10{--c:var(--l10)} .line.l11{--c:var(--l11)} .line.l17{--c:var(--l17)}
.line b.dot{min-width:14px;width:14px;height:14px;padding:0}

/* hub hero */
.hero{padding-block:40px 0}
.eyebrow{font-size:.8rem;font-weight:700;letter-spacing:.12em;color:var(--river);text-transform:uppercase}
h1,h2,h3{text-wrap:balance;line-height:1.3}
.hero h1{font-family:var(--f-display);font-weight:400;font-size:clamp(2.6rem,7vw,4.6rem);line-height:1.08;margin:10px 0 16px;letter-spacing:-.01em}
.lead{font-size:1.12rem;color:var(--muted);max-width:40em;margin:0}
.skyline{display:block;width:100%;height:auto;margin-top:28px;border-radius:14px}
.sky-a{stop-color:var(--sky-top)} .sky-b{stop-color:var(--sky-bot)}
.b-far{fill:var(--bldg-far)} .b-mid{fill:var(--bldg-mid)} .b-near{fill:var(--bldg-near)} .water{fill:var(--water)} .win{fill:var(--win)} .sun{fill:var(--glow)} .wave{stroke:var(--paper);stroke-width:2;opacity:.45;fill:none}

/* facts */
.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule);border-radius:12px;overflow:hidden;margin:28px 0 0}
.facts div{background:var(--card);padding:16px 18px;min-width:0}
.facts dt{font-size:.78rem;color:var(--muted);font-weight:600;letter-spacing:.04em}
.facts dd{margin:4px 0 0;font-weight:700;font-size:1.02rem;line-height:1.45}
.facts dd small{display:block;font-weight:400;color:var(--muted);font-size:.82rem}
@media (max-width:820px){.facts{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* sections */
section{padding-block:44px 8px}
h2{font-family:var(--f-display);font-weight:400;font-size:clamp(1.6rem,3.6vw,2.2rem);margin:0 0 8px;letter-spacing:-.005em}
.sec-sub{color:var(--muted);margin:0 0 24px}

/* route map */
.route{list-style:none;margin:0;padding:0;position:relative}
.route::before{content:"";position:absolute;left:21px;top:22px;bottom:22px;width:6px;border-radius:3px;background:linear-gradient(var(--l1),var(--l2),var(--l8),var(--l10),var(--l4),var(--l11))}
.route li{position:relative;padding-left:64px;padding-block:6px}
.route a{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 16px;align-items:center;text-decoration:none;color:var(--ink);background:var(--card);border:1px solid var(--rule);border-radius:12px;padding:16px 20px;transition:border-color .15s,transform .15s}
.route a:hover{border-color:var(--ink);transform:translateX(3px)}
.route .stop{position:absolute;left:8px;top:50%;translate:0 -50%;width:32px;height:32px;border-radius:50%;background:var(--card);border:6px solid var(--c,var(--l1))}
.route .stage{font-size:.76rem;font-weight:700;letter-spacing:.08em;color:var(--muted)}
.route .t{font-weight:700;font-size:1.08rem;line-height:1.4}
.route .d{grid-column:1/-1;color:var(--muted);font-size:.93rem;line-height:1.6}
.route .go{grid-row:1/3;grid-column:2;font-family:var(--f-mono);font-size:.82rem;color:var(--muted)}
@media (max-width:560px){.route .go{display:none}.route a{grid-template-columns:minmax(0,1fr)}}

/* areas */
.areas{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.area{background:var(--card);border:1px solid var(--rule);border-radius:12px;padding:18px;display:flex;flex-direction:column;gap:6px;min-width:0}
.area h3{margin:0;font-size:1.06rem}
.area p{margin:0;font-size:.93rem;color:var(--muted);line-height:1.6}
.area .meta{margin-top:auto;padding-top:8px;display:flex;flex-wrap:wrap;gap:6px}
.chip{font-family:var(--f-mono);font-size:.76rem;border:1px solid var(--rule);border-radius:6px;padding:2px 7px;color:var(--ink);background:var(--paper);white-space:nowrap}
.cn{font-family:var(--f-mono);font-size:.82em;background:var(--river-soft);color:var(--ink);border-radius:5px;padding:1px 6px;white-space:nowrap}

/* tables */
.table-wrap{overflow-x:auto;border:1px solid var(--rule);border-radius:12px;background:var(--card);margin:18px 0}
table{border-collapse:collapse;width:100%;font-size:.94rem;min-width:520px}
th,td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--rule);vertical-align:top;line-height:1.55}
th{font-size:.8rem;letter-spacing:.04em;color:var(--muted);font-weight:700;background:var(--paper)}
tr:last-child td{border-bottom:0}
td.num,th.num{text-align:right;font-family:var(--f-mono);font-variant-numeric:tabular-nums;white-space:nowrap}
tfoot td{font-weight:700;background:var(--river-soft)}

/* faq */
.faq details{max-width:760px;border-bottom:1px solid var(--rule);padding-block:4px}
.faq summary{cursor:pointer;font-weight:700;padding-block:14px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--f-mono);color:var(--muted)}
.faq details[open] summary::after{content:"−"}
.faq details p{margin:0 0 16px;color:var(--muted)}

/* cta */
.cta{margin-block:48px 0;background:var(--ink);color:var(--paper);border-radius:16px;padding:32px clamp(20px,4vw,40px);display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between}
.cta h2{color:var(--paper);margin:0 0 6px;font-size:clamp(1.4rem,3vw,1.8rem)}
.cta p{margin:0;opacity:.8;max-width:34em}
.cta a{background:var(--glow);color:#1B1305;font-weight:700;text-decoration:none;border-radius:999px;padding:12px 22px;white-space:nowrap}
.cta a:hover{filter:brightness(1.06)}

/* article */
.crumbs{font-size:.84rem;color:var(--muted);padding-top:24px}
.crumbs a{color:var(--muted)}
.art-head{padding-block:18px 8px;border-bottom:1px solid var(--rule)}
.art-head h1{font-family:var(--f-display);font-weight:400;font-size:clamp(2rem,5vw,3rem);line-height:1.18;margin:14px 0 12px;letter-spacing:-.005em}
.art-meta{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:.85rem;color:var(--muted);margin-bottom:18px}
.art-band{height:8px;border-radius:4px;background:var(--c);margin-top:20px}
article{padding-bottom:12px}
article h2{font-size:clamp(1.4rem,3vw,1.75rem);margin-top:44px;scroll-margin-top:80px}
article h3{font-size:1.12rem;margin:28px 0 6px}
article p,article li{max-width:42em}
article ul,article ol{padding-left:1.3em}
article li{margin-bottom:6px}
.answer{background:var(--card);border:1px solid var(--rule);border-left:6px solid var(--c);border-radius:10px;padding:18px 20px;margin:24px 0;font-size:1.04rem}
.answer strong{display:block;font-size:.78rem;letter-spacing:.08em;color:var(--muted);margin-bottom:4px}
.toc{background:var(--card);border:1px solid var(--rule);border-radius:10px;padding:16px 20px;margin:24px 0}
.toc p{margin:0 0 6px;font-size:.78rem;font-weight:700;letter-spacing:.08em;color:var(--muted)}
.toc ol{margin:0;padding-left:1.2em}
.toc li{margin:2px 0}
.note{border-radius:10px;padding:14px 18px;margin:20px 0;background:var(--river-soft);font-size:.96rem}
.note.warn{background:color-mix(in srgb,var(--l1) 12%,var(--card))}
.note b{margin-right:6px}
.steps{counter-reset:s;list-style:none;padding:0}
.steps li{counter-increment:s;position:relative;padding-left:46px;margin-bottom:14px}
.steps li::before{content:counter(s);position:absolute;left:0;top:2px;width:30px;height:30px;border-radius:50%;background:var(--c);color:#fff;display:grid;place-items:center;font-family:var(--f-mono);font-weight:700;font-size:.9rem}
.day{border:1px solid var(--rule);border-radius:12px;background:var(--card);padding:6px 20px 14px;margin:18px 0}
.day h3{display:flex;align-items:center;gap:10px}
.day h3 span{font-family:var(--f-mono);font-size:.8rem;background:var(--c);color:#fff;border-radius:6px;padding:2px 8px}
.day ol{margin:0}
.calc{background:var(--card);border:1px solid var(--rule);border-radius:12px;padding:20px;margin:22px 0;display:grid;gap:14px}
.calc .row{display:flex;flex-wrap:wrap;gap:10px 22px;align-items:center}
.calc label{font-weight:600;font-size:.95rem;display:flex;align-items:center;gap:8px}
.calc input[type=number]{width:72px;padding:6px 8px;border:1px solid var(--rule);border-radius:8px;background:var(--paper);color:var(--ink);font:inherit}
.calc output{font-family:var(--f-mono);font-size:1.5rem;font-weight:600;font-variant-numeric:tabular-nums}
.calc small{color:var(--muted)}
.next{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:40px}
.next a{border:1px solid var(--rule);border-radius:12px;padding:16px 18px;text-decoration:none;color:var(--ink);background:var(--card);display:flex;flex-direction:column;gap:4px;min-width:0}
.next a:hover{border-color:var(--ink)}
.next span{font-size:.78rem;color:var(--muted);font-weight:700;letter-spacing:.06em}
.next .nx{text-align:right;grid-column:2}
@media (max-width:560px){.next{grid-template-columns:minmax(0,1fr)}.next .nx{grid-column:1;text-align:left}}

/* footer */
.site-foot{margin-top:56px;border-top:1px solid var(--rule);padding-block:28px 40px;font-size:.86rem;color:var(--muted)}
.site-foot .wrap{display:flex;flex-wrap:wrap;gap:12px 32px;justify-content:space-between}
.foot-about{flex:1 1 260px;max-width:340px}
.foot-links{flex:3 1 520px;display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:18px 24px}
.foot-links div{display:flex;flex-direction:column;gap:4px;min-width:0}
.foot-links b{color:var(--ink);font-size:.8rem;letter-spacing:.04em}
.site-foot a{color:var(--muted)}

@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* 카페 가입 유도 */
.hero-join{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;margin:20px 0 0}
.hero-join a{background:var(--ink);color:var(--paper);font-weight:700;text-decoration:none;border-radius:999px;padding:10px 20px}
.hero-join a:hover{opacity:.9}
.hero-join span{font-size:.88rem;color:var(--muted)}
.join{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 24px;margin:24px 0;padding:20px 22px;border-radius:12px;background:var(--river-soft);border:1px solid color-mix(in srgb,var(--river) 30%,transparent)}
.join-txt{flex:1 1 320px;min-width:0}
.join-k{display:block;font-size:.76rem;font-weight:700;letter-spacing:.06em;color:var(--river)}
.join strong{display:block;font-size:1.12rem;margin:2px 0 4px}
.join p{margin:0;font-size:.95rem;color:var(--muted);max-width:none}
.join-btn{background:var(--glow);color:#1B1305;font-weight:700;text-decoration:none;border-radius:999px;padding:12px 22px;white-space:nowrap}
.join-btn:hover{filter:brightness(1.06)}
.joinbar{display:none}
@media (max-width:720px){
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom,0px))}
  .joinbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:10;align-items:center;justify-content:space-between;gap:12px;
    background:var(--ink);color:var(--paper);font-size:.86rem;line-height:1.4;
    padding:10px max(16px,env(safe-area-inset-right,0px)) calc(10px + env(safe-area-inset-bottom,0px)) max(16px,env(safe-area-inset-left,0px))}
  .joinbar b{display:block;font-size:.92rem}
  .joinbar a{background:var(--glow);color:#1B1305;font-weight:700;text-decoration:none;border-radius:999px;padding:9px 16px;white-space:nowrap}
}

/* 전체 가이드 묶음 */
.groups{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px;align-items:start}
.group{background:var(--card);border:1px solid var(--rule);border-radius:12px;padding:6px 18px 10px;min-width:0}
.group h3{display:flex;align-items:center;gap:10px;font-size:1.02rem;margin:12px 0 4px}
.gdot{width:14px;height:14px;border-radius:50%;border:4px solid var(--c);flex:none}
.cnt{margin-left:auto;font-family:var(--f-mono);font-size:.78rem;color:var(--muted)}
.group ul{list-style:none;margin:0;padding:0}
.group li{border-top:1px solid var(--rule)}
.group li:first-child{border-top:0}
.group a{display:flex;flex-direction:column;padding:10px 0;text-decoration:none;color:var(--ink)}
.group a:hover .t{text-decoration:underline;text-underline-offset:3px}
.group .t{font-weight:600;line-height:1.45}
.group .d{font-size:.86rem;color:var(--muted);line-height:1.5}
/* 관련 글 */
.related{padding-block:36px 0}
.related h2{font-size:1.4rem}
.related ul{list-style:none;margin:12px 0 0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.related a{display:flex;gap:12px;align-items:flex-start;background:var(--card);border:1px solid var(--rule);border-radius:12px;padding:14px 16px;text-decoration:none;color:var(--ink);height:100%}
.related a:hover{border-color:var(--ink)}
.related a > span:last-child{display:flex;flex-direction:column;font-weight:600;line-height:1.45;min-width:0}
.related small{font-weight:400;color:var(--muted);font-size:.84rem;margin-top:2px}
.rdot{flex:none;width:14px;height:14px;margin-top:5px;border-radius:50%;border:4px solid var(--c)}
@media (max-width:560px){.related ul{grid-template-columns:minmax(0,1fr)}}
.art-faq{padding-block:8px 0}