/* ==============================================
   PPORT.cloud - 공통 스타일
   파란색 강조, 문서형 탐색, 간결한 도구 작업 영역.
   외부 CSS 프레임워크를 쓰지 않는다 (1GB 서버 / 로딩 속도).
   ============================================== */

:root{
  --bg:#f7f8fa; --white:#fff; --border:#e2e5ea; --border-focus:#2563eb;
  --text:#1a1d23; --text2:#4a5060; --muted:#657185;
  --accent:#245dcc; --accent-hover:#1d4ed8; --accent-light:#eff4ff;
  --green:#059669; --green-bg:#ecfdf5; --green-border:#a7f3d0;
  --red:#dc2626; --red-bg:#fef2f2; --red-border:#fecaca;
  --amber:#d97706; --amber-bg:#fffbeb; --amber-border:#fde68a;
  --mono:'IBM Plex Mono','SFMono-Regular',Consolas,monospace;
  --sans:Arial,'Malgun Gothic',-apple-system,BlinkMacSystemFont,sans-serif;
  --radius:8px;
  --maxw:920px;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans); background:var(--white); color:var(--text);
  line-height:1.75; -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:8px;top:8px;z-index:200;background:var(--white);
  padding:10px 16px;border:2px solid var(--accent);border-radius:6px}

/* ---------- 네비게이션 ---------- */
.nav{background:var(--white);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.nav-inner{max-width:1100px;margin:0 auto;padding:0 20px;height:56px;
  display:flex;align-items:center;gap:24px}
.nav-logo{font-family:var(--mono);font-size:17px;font-weight:700;color:var(--text);
  display:flex;align-items:center;gap:8px;white-space:nowrap}
.nav-logo:hover{text-decoration:none}
.nav-logo svg{width:24px;height:24px;flex-shrink:0}
.nav-logo em{color:var(--accent);font-style:normal}

.nav-menu{display:flex;align-items:center;gap:2px;overflow-x:auto;scrollbar-width:none}
.nav-menu::-webkit-scrollbar{display:none}
.nav-group{position:relative}
.nav-group-btn,.nav-link{
  font:inherit;font-size:13.5px;font-weight:500;color:var(--text2);
  background:none;border:0;padding:8px 11px;border-radius:6px;cursor:pointer;
  white-space:nowrap;display:block;
}
.nav-group-btn:hover,.nav-link:hover{background:var(--bg);color:var(--text);text-decoration:none}
.nav-group-btn[aria-expanded="true"]{background:var(--accent-light);color:var(--accent)}
.nav-drop{
  position:absolute;top:calc(100% + 4px);left:0;min-width:190px;
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:0 8px 24px rgba(15,23,42,.10);padding:6px;list-style:none;display:none;
}
.nav-drop.open{display:block}
.nav-drop a{display:block;padding:8px 12px;font-size:13.5px;color:var(--text2);border-radius:5px}
.nav-drop a:hover{background:var(--accent-light);color:var(--accent);text-decoration:none}

/* ---------- 브레드크럼 ---------- */
.crumb{max-width:var(--maxw);margin:0 auto;padding:14px 20px 0}
.crumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;font-size:12.5px;color:var(--muted)}
.crumb li+li::before{content:'/';margin-right:6px;color:var(--border)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--accent)}

/* ---------- 레이아웃 ---------- */
.container{max-width:var(--maxw);margin:0 auto;padding:20px 20px 72px}
.page-h1{font-size:29px;line-height:1.35;font-weight:700;letter-spacing:-.4px;margin-bottom:12px}
.lead{font-size:16px;color:var(--text2);margin-bottom:22px}

/* ---------- 도구 박스 ---------- */
.tool-box{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px;margin-bottom:18px}
.tool-fallback{color:var(--muted);font-size:14px;text-align:center;padding:20px 0}

.field{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}
.field-label{font-size:12.5px;font-weight:600;color:var(--text2)}
.field-hint{font-size:12px;color:var(--muted)}
.input{
  font-family:var(--mono);font-size:14.5px;width:100%;padding:11px 13px;
  background:var(--white);border:1px solid var(--border);border-radius:6px;
  color:var(--text);outline:none;transition:border-color .15s,box-shadow .15s;
}
.input:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.input::placeholder{color:var(--muted);font-family:var(--sans)}
textarea.input{min-height:130px;resize:vertical;line-height:1.6}

.row{display:flex;gap:10px;align-items:flex-end;flex-wrap:wrap}
.row>.field{flex:1;min-width:180px;margin-bottom:0}
.btn{
  font:inherit;font-size:14px;font-weight:600;padding:11px 24px;
  background:var(--accent);color:#fff;border:0;border-radius:6px;cursor:pointer;
  transition:background .15s;white-space:nowrap;
}
.btn:hover{background:var(--accent-hover)}
.btn:disabled{background:#9ca3af;cursor:not-allowed}
.btn-sub{background:var(--bg);color:var(--text2);border:1px solid var(--border);font-weight:500;padding:9px 16px}
.btn-sub:hover{background:var(--white);border-color:var(--accent);color:var(--accent)}

.chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.chip{font-family:var(--mono);font-size:12px;padding:5px 10px;background:var(--bg);
  border:1px solid var(--border);border-radius:4px;color:var(--text2);cursor:pointer}
.chip:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-light)}
.chip.on{background:var(--accent-light);border-color:var(--accent);color:var(--accent);font-weight:600}

/* ---------- 결과 ---------- */
.result{margin-top:16px;border-radius:6px;padding:16px;border:1px solid var(--border);background:var(--bg)}
.result.ok{background:var(--green-bg);border-color:var(--green-border)}
.result.bad{background:var(--red-bg);border-color:var(--red-border)}
.result.warn{background:var(--amber-bg);border-color:var(--amber-border)}
.result-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.badge{font-size:11.5px;font-weight:700;letter-spacing:.4px;padding:4px 10px;border-radius:4px;
  text-transform:uppercase;font-family:var(--mono)}
.badge.ok{background:var(--green);color:#fff}
.badge.bad{background:var(--red);color:#fff}
.badge.warn{background:var(--amber);color:#fff}
.badge.info{background:var(--text2);color:#fff}
.result-title{font-weight:600;font-size:15px}

.kv{display:grid;grid-template-columns:minmax(110px,auto) 1fr;gap:6px 16px;font-size:13.5px}
.kv dt{color:var(--muted);font-weight:500}
.kv dd{font-family:var(--mono);color:var(--text);word-break:break-all}

.pre{font-family:var(--mono);font-size:12.5px;line-height:1.65;background:#0f172a;color:#e2e8f0;
  padding:14px;border-radius:6px;overflow-x:auto;white-space:pre;margin-top:10px;max-height:420px}
.copy-row{display:flex;justify-content:flex-end;margin-top:8px}

.spinner{display:inline-block;width:14px;height:14px;border:2px solid rgba(255,255,255,.35);
  border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;vertical-align:-2px}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 본문 ---------- */
.doc{margin-top:34px}
.doc h2{font-size:20px;font-weight:700;letter-spacing:-.2px;margin-bottom:12px;
  padding-bottom:8px;border-bottom:1px solid var(--border)}
.doc p{font-size:15px;color:var(--text2);margin-bottom:12px}
.doc-list{margin:0 0 12px 20px;font-size:15px;color:var(--text2)}
.doc-list li{margin-bottom:6px}
.note{background:var(--amber-bg);border:1px solid var(--amber-border);border-left:3px solid var(--amber);
  padding:12px 14px;border-radius:0 6px 6px 0;font-size:14px;color:#78350f;margin-top:6px}

.table-wrap{overflow-x:auto;margin-bottom:12px;border:1px solid var(--border);border-radius:6px}
.doc-table{width:100%;border-collapse:collapse;font-size:13.5px;background:var(--white);min-width:420px}
.doc-table th,.doc-table td{padding:9px 13px;text-align:left;border-bottom:1px solid var(--border)}
.doc-table th{background:var(--bg);font-weight:600;color:var(--text2);white-space:nowrap}
.doc-table tr:last-child td{border-bottom:0}

/* ---------- FAQ ---------- */
.faq details{background:var(--white);border:1px solid var(--border);border-radius:6px;
  margin-bottom:8px;overflow:hidden}
.faq summary{padding:13px 16px;font-size:14.5px;font-weight:600;cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';color:var(--muted);font-size:18px;font-weight:400;flex-shrink:0}
.faq details[open] summary::after{content:'\2212'}
.faq summary:hover{background:var(--bg)}
.faq-a{padding:0 16px 15px;font-size:14.5px;color:var(--text2)}

/* ---------- 관련 도구 ---------- */
.related-top{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;
  padding:12px 14px;background:var(--accent-light);border-radius:6px;margin-bottom:8px}
.related-label{color:var(--accent);font-weight:700;font-size:12px}
.related-top a{background:var(--white);border:1px solid #c7d7fb;padding:5px 11px;border-radius:4px;font-size:13px}
.related-top a:hover{border-color:var(--accent);text-decoration:none}

.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px}
.tool-card{display:block;background:var(--white);border:1px solid var(--border);border-radius:6px;
  padding:14px 16px;transition:border-color .15s,transform .15s}
.tool-card:hover{border-color:var(--accent);text-decoration:none;transform:translateY(-1px)}
.tool-card-name{display:block;font-weight:600;font-size:14.5px;color:var(--text);margin-bottom:3px}
.tool-card-desc{display:block;font-size:12.5px;color:var(--muted);line-height:1.5}

.cat-block{margin-bottom:30px}
.cat-block h2{font-size:18px;margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border)}

/* ---------- 푸터 ---------- */
.footer{background:var(--white);border-top:1px solid var(--border);margin-top:40px}
.footer-inner{max-width:1100px;margin:0 auto;padding:32px 20px 24px}
.footer-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:24px;margin-bottom:26px}
.footer-h{font-size:12px;font-weight:700;color:var(--text);text-transform:uppercase;
  letter-spacing:.5px;margin-bottom:9px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:5px}
.footer-col a{font-size:13px;color:var(--muted)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid var(--border);padding-top:16px;display:flex;
  justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:var(--muted)}
.footer-bottom nav{display:flex;gap:16px;flex-wrap:wrap}
.footer-bottom a{color:var(--muted)}

/* ---------- 문서형 작업 영역 ---------- */
.nav{background:#204faa;border-color:#1c4697}
.nav-inner{max-width:1200px;height:64px;padding:0 28px}
.nav-logo{font-family:var(--sans);font-size:21px;letter-spacing:-.6px;color:#fff}
.nav-logo em{color:#c7d9fa;font-size:16px;font-weight:400;letter-spacing:0}
.nav-menu{margin-left:auto;overflow:visible;gap:4px}
.nav-link{font-size:13px;color:#e5edfc}
.nav-link:hover{background:#ffffff12;color:#fff}
.workspace{display:grid;grid-template-columns:210px minmax(0,1fr);max-width:1200px;margin:0 auto;min-height:calc(100vh - 64px)}
.workspace-content{min-width:0}
.sidebar{border-right:1px solid var(--border);padding:30px 18px 40px 28px;background:#fafbfc}
.sidebar a{display:block;font-size:12px;color:#586479;padding:7px 10px;border-radius:4px;line-height:1.45}
.sidebar a:hover{background:#edf1f7;text-decoration:none;color:var(--text)}
.sidebar a.active{color:var(--accent);background:#eaf0fc;font-weight:700}
.sidebar-group{margin-top:24px}
.sidebar-group h2{font-size:11px;color:#7a8392;padding:0 10px 7px;font-weight:600}
.sidebar-help{margin-top:32px;border-top:1px solid var(--border);border-radius:0!important;padding-top:20px!important}
.container{padding:32px 36px 72px}
.crumb{padding:24px 36px 0}
.page-h1{font-size:28px;line-height:1.4;letter-spacing:-1px;margin-bottom:8px;word-break:keep-all;overflow-wrap:anywhere}
.lead{font-size:14px;margin-bottom:28px;line-height:1.8;word-break:keep-all;overflow-wrap:anywhere}
.home-heading{margin:8px 0 28px}.home-heading .lead{margin-bottom:0}
.connection-summary{background:#f3f6fc;border:1px solid #dbe4f4;border-radius:6px;display:grid;grid-template-columns:minmax(0,1fr) auto;margin-bottom:40px;padding:25px 26px;gap:24px;align-items:center}
.connection-details{min-width:0}
.ip-line{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin:9px 0 12px}
#homeIp{font-family:var(--mono);font-size:28px;line-height:1.4;letter-spacing:-1px;user-select:all;overflow-wrap:anywhere}
.ip-copy{border:0;background:none;color:var(--accent);font:12px var(--sans);cursor:pointer;padding:8px 0}
.ip-detail-link{font-size:12px;color:#5a6e8a}.ip-detail-link span{margin-left:8px}
.connection-action{border-left:1px solid #d9e2f2;padding-left:26px}
.connection-action strong{font-size:14px;font-weight:600}
.connection-action p{font-size:12px;color:#657185;margin:6px 0 14px}
.connection-action .btn{display:block;font-size:13px;padding:10px 16px;text-align:center}
.connection-action .btn:hover{text-decoration:none}.connection-action .btn span{margin-left:16px}
.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:0 28px}
.tool-card{border:0;border-bottom:1px solid var(--border);border-radius:0;padding:17px 24px 17px 0;position:relative;transition:none}
.tool-card::after{content:'→';position:absolute;right:4px;top:18px;color:#8391a5;font-size:14px}
.tool-card:hover{transform:none;text-decoration:none;background:#f8faff;border-color:var(--border)}
.tool-card:hover .tool-card-name{color:var(--accent)}
.cat-block{margin-bottom:36px}.cat-block h2{font-size:15px;margin-bottom:0;padding-bottom:8px;border:0}
.related-top{gap:16px;padding:12px 0;background:transparent;border-bottom:1px solid var(--border);border-radius:0}
.related-top a{background:transparent;border:0;padding:0}
.port-target{background:#f3f6fc;border-bottom:1px solid #dbe4f4;margin:-22px -22px 24px;padding:22px;border-radius:6px 6px 0 0}
#ptMyIp{font:600 26px/1.6 var(--mono);letter-spacing:-.7px;user-select:all;overflow-wrap:anywhere;margin:3px 0}
.port-target p,.port-presets-label{font-size:12px;color:var(--muted)}.port-presets-label{margin-top:22px}
.port-target .ip-line{margin:3px 0 6px}.home-port-links{margin-bottom:32px}
.ip-copy:disabled{color:var(--muted);cursor:default}
.chip{font-family:var(--sans);padding:6px 10px;background:#fff}
.tool-page .doc p{font-size:14px;line-height:1.85}
.notice{padding:12px;margin-bottom:18px;background:var(--amber-bg);font-size:13px;color:#78350f}
:where(a,button,summary):focus-visible{outline:2px solid var(--accent);outline-offset:3px}.nav :focus-visible{outline-color:#fff}
@media(max-width:960px){
  .workspace{grid-template-columns:180px minmax(0,1fr)}
  .sidebar{padding-left:12px;padding-right:12px}
  .container{padding-left:24px;padding-right:24px}
  .connection-summary{grid-template-columns:1fr}
  .connection-action{border-left:0;border-top:1px solid #d9e2f2;padding:18px 0 0}
  .connection-action .btn{display:inline-block}
}
/* ---------- 반응형 ---------- */
@media (max-width:720px){
  .workspace{display:block}.sidebar{display:none}
  .nav-inner{gap:8px;padding:0 16px;height:58px}
  .nav-logo{font-size:18px}.nav-logo em{font-size:13px}
  .nav-menu{gap:0}
  .nav-group-btn,.nav-link{padding:8px 6px;font-size:12px}
  .container{padding:26px 20px 56px}.crumb{padding:18px 20px 0}
  .connection-summary{padding:20px;gap:18px;margin-bottom:30px}
  #homeIp{font-size:25px}.card-grid{grid-template-columns:1fr}
  .page-h1{font-size:24px}
  .lead{font-size:15px}
  .doc h2{font-size:18px}
  .kv{grid-template-columns:1fr;gap:2px 0}
  .kv dd{margin-bottom:8px}
}