:root{
  --bg:#f4f6fb; --card:#fff; --text:#1d2433; --muted:#6b7385; --line:#e3e7ef;
  --primary:#2f6bff; --primary-d:#1f54d6; --soft:#eef3ff; --ok:#14a06b; --err:#e5484d;
  --radius:14px; --shadow:0 4px 18px rgba(20,35,80,.06);
}
@media (prefers-color-scheme:dark){
  :root{ --bg:#0f131b; --card:#171c26; --text:#e7ebf3; --muted:#9099ab; --line:#272e3c;
         --primary:#5b8cff; --primary-d:#7aa2ff; --soft:#1c2536; --shadow:none; }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);
  font-family:"Pretendard","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;font-size:15px;line-height:1.6}
a{color:var(--primary)}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px}
.hidden{display:none!important}
.muted{color:var(--muted)}

/* 상단바 */
.topbar{position:sticky;top:0;z-index:1000;background:color-mix(in srgb,var(--card) 88%,transparent);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.topbar-in{display:flex;align-items:center;justify-content:space-between;height:58px;gap:12px}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.1em;color:var(--text);text-decoration:none}
.brand small{font-weight:600;color:var(--muted);font-size:.72em}
.brand-dot{width:12px;height:12px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 4px var(--soft)}
.topnav{display:flex;gap:18px}
.topnav a{color:var(--muted);text-decoration:none;font-size:.92em}
.topnav a:hover{color:var(--text)}
@media (max-width:640px){.topnav{display:none}}

/* 카드 */
main{padding:20px 16px 40px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:22px;margin-bottom:18px}
h2{font-size:1.15em;margin:0 0 14px}
h3{font-size:.95em;margin:0 0 8px;color:var(--muted)}

/* 히어로 */
.hero{display:grid;grid-template-columns:1.4fr 1fr;gap:20px;align-items:center}
@media (max-width:760px){.hero{grid-template-columns:1fr}}
.eyebrow{margin:0;color:var(--muted);font-size:.88em}
.myip-row{display:flex;align-items:center;gap:8px;margin:4px 0 6px;min-width:0}
.myip{font-size:2.1em;letter-spacing:.5px;color:var(--primary);word-break:break-all}
.hero-loc{margin:0;font-size:1.08em;font-weight:600}
.hero-sub{margin:2px 0 0;color:var(--muted);font-size:.9em}
.hero-side{display:flex;flex-direction:column;gap:12px}
.quota{display:flex;justify-content:space-between;background:var(--soft);border-radius:10px;padding:10px 14px;font-size:.92em}
.reg-box{border:1px dashed var(--line);border-radius:10px;padding:12px 14px}
.reg-box p{margin:0 0 10px;font-size:.9em}
.reg-actions{display:flex;gap:8px;flex-wrap:wrap}

/* 버튼/입력 */
.btn{border:0;border-radius:10px;padding:10px 16px;font-weight:700;font-size:.92em;cursor:pointer;font-family:inherit}
.btn.primary{background:var(--primary);color:#fff}
.btn.primary:hover{background:var(--primary-d)}
.btn.ghost{background:transparent;color:var(--muted);border:1px solid var(--line)}
.btn:disabled{opacity:.6;cursor:wait}
.icon-btn{border:1px solid var(--line);background:var(--card);color:var(--muted);border-radius:8px;width:32px;height:32px;cursor:pointer;flex-shrink:0}
.search{display:flex;gap:8px;flex-wrap:wrap}
.search input{flex:1 1 220px;min-width:0}
input,textarea,select{font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px 12px;outline:none}
input:focus,textarea:focus,select:focus{border-color:var(--primary)}
textarea{width:100%;resize:vertical}
.row-end{display:flex;justify-content:flex-end;margin-top:8px}

/* 탭 */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:16px;overflow-x:auto}
.tab{background:none;border:0;padding:9px 14px;font:inherit;font-weight:600;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent;white-space:nowrap}
.tab.active{color:var(--primary);border-bottom-color:var(--primary)}
.tab-pane{display:none}
.tab-pane.active{display:block}

/* 결과 */
.result{margin-top:18px}
.result-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:16px}
@media (max-width:760px){.result-grid{grid-template-columns:1fr}}
.kv{display:grid;grid-template-columns:auto 1fr;gap:8px 14px;margin:0;align-content:start}
.kv dt{color:var(--muted);font-size:.88em}
.kv dd{margin:0;font-weight:600;word-break:break-all}
.map{height:300px;border-radius:12px;border:1px solid var(--line);z-index:1}
.badge{display:inline-block;font-size:.78em;padding:2px 8px;border-radius:99px;background:var(--soft);color:var(--primary);font-weight:700}
.badge.user{background:#e7f7ef;color:var(--ok)}
@media (prefers-color-scheme:dark){.badge.user{background:#143426}}
.history{margin-top:14px;font-size:.88em}
.history ul{list-style:none;margin:6px 0 0;padding:0;border-top:1px solid var(--line)}
.history li{display:flex;gap:12px;padding:6px 0;border-bottom:1px solid var(--line);flex-wrap:wrap}
.note,.hint{font-size:.82em;color:var(--muted);margin:14px 0 0}

/* 표 */
.table-wrap{overflow-x:auto;margin-top:16px}
.tbl{width:100%;border-collapse:collapse;font-size:.9em}
.tbl th,.tbl td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);white-space:nowrap}
.tbl th{color:var(--muted);font-weight:600;background:var(--soft)}
.tool-out{margin-top:14px}
.ok{color:var(--ok);font-weight:700}.err{color:var(--err);font-weight:700}

/* 최근 현황 */
.sec-head{display:flex;justify-content:space-between;align-items:baseline;gap:10px;flex-wrap:wrap}
.sec-head .muted{font-size:.82em}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media (max-width:760px){.two-col{grid-template-columns:1fr}}
.feed{list-style:none;margin:0;padding:0}
.feed li{display:grid;grid-template-columns:110px 1fr auto;gap:8px;padding:7px 0;border-bottom:1px solid var(--line);font-size:.88em}
.feed li.muted{display:block}
.feed .ip{color:var(--muted);font-family:ui-monospace,Consolas,monospace}
.feed .t{color:var(--muted);white-space:nowrap}
.total{margin:14px 0 0;font-size:.9em;color:var(--muted)}

/* FAQ */
details{border-bottom:1px solid var(--line);padding:12px 0}
details:last-child{border-bottom:0}
summary{cursor:pointer;font-weight:600}
details p{margin:8px 0 0;color:var(--muted);font-size:.92em}

/* 광고 자리: 광고 코드를 넣기 전까지는 공간을 차지하지 않음 */
.ad-slot{margin:0 0 18px}
.ad-slot:empty{display:none}

.footer{border-top:1px solid var(--line);padding:22px 0 40px;font-size:.84em}
.footer p{margin:4px 0}

.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:#1d2433;color:#fff;
  padding:10px 18px;border-radius:10px;font-size:.9em;opacity:0;transition:.25s;pointer-events:none;z-index:2000;max-width:calc(100% - 32px)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* 개인정보처리방침 */
.doc h1{font-size:1.4em}
.doc h2{font-size:1.05em;margin-top:22px}
.doc li,.doc p{color:var(--text)}

/* v2: 접속 환경 / 도구 확장 */
.tabs-wrap{flex-wrap:wrap;overflow:visible}
.row-end.gap{gap:8px;flex-wrap:wrap}
.btn.ghost{text-decoration:none;display:inline-flex;align-items:center}
.verdict{border-radius:10px;padding:12px 14px;margin-bottom:14px;font-weight:600;background:var(--soft)}
.verdict.warn{background:#fff4e5;color:#9a5b00}
.verdict.good{background:#e7f7ef;color:var(--ok)}
@media (prefers-color-scheme:dark){.verdict.warn{background:#3a2a10;color:#ffc56b}.verdict.good{background:#143426}}
.env-grid{grid-template-columns:auto 1fr auto 1fr}
@media (max-width:760px){.env-grid{grid-template-columns:auto 1fr}}
.grade{display:inline-block;padding:2px 8px;border-radius:6px;font-size:.82em;font-weight:700}
.grade.ok{background:#e7f7ef;color:var(--ok)}
.grade.bad{background:#fdecec;color:var(--err)}
.grade.na{background:var(--soft);color:var(--muted)}
@media (prefers-color-scheme:dark){.grade.ok{background:#143426}.grade.bad{background:#3b1517}}
.issues{margin:10px 0 0;padding-left:18px}
.issues li{margin:3px 0}
.hop{border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin-bottom:10px}
.hop summary{font-weight:600}
.mono{font-family:ui-monospace,Consolas,monospace;font-size:.9em;word-break:break-all}
.ip-title{font-size:1.8em;margin:4px 0 6px;color:var(--primary);word-break:break-all}
.lead{margin:0 0 16px;color:var(--muted)}
.ip-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.ip-nav{display:flex;justify-content:space-between;margin:14px 0 0;font-size:.9em}