/* ============================================================
   도서관이 캠퍼스다 — 디자인 시스템
   브랜드: Navy #0B2E5C · Cyan #0FA3B1 · Cream #FAFAF6 (기존 사이트 계승)
   차트 시리즈(검증 통과): teal #008FA3 · blue #2A6BC4 · amber #B4830B · violet #7C3AED
   ============================================================ */
:root {
  --bg: #FAFAF6;
  --surface: #FFFFFF;
  --surface-alt: #F0F2F5;
  --ink: #1F2937;
  --ink-2: #5A6470;
  --ink-3: #94A3B8;
  --border: #E5E7EB;
  --navy: #0B2E5C;
  --navy-deep: #08213F;
  --cyan: #0FA3B1;
  --cyan-deep: #0B7A8C;
  --amber: #C99700;
  --red: #C5283D;
  --s1: #008FA3;  /* 차트 1: 방송대 */
  --s2: #2A6BC4;  /* 차트 2: 공공 */
  --s3: #B4830B;
  --s4: #7C3AED;
  --ramp-0: #DCEEF0; --ramp-1: #AEDCE0; --ramp-2: #79C4CB;
  --ramp-3: #3FA6B0; --ramp-4: #147F8B; --ramp-5: #0A5560;
  --none-fill: #E9ECEF;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(11,46,92,.08), 0 6px 18px rgba(11,46,92,.06);
  --shadow-lg: 0 4px 10px rgba(11,46,92,.10), 0 16px 40px rgba(11,46,92,.10);
  --font: "Pretendard Variable", Pretendard, -apple-system, "Segoe UI",
          "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  --header-h: 60px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }
html, body { overflow-x: clip; max-width: 100vw; } /* sticky 유지를 위해 hidden 대신 clip */
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--font); font-size: 15.5px; line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
a { color: var(--cyan-deep); }
em { font-style: normal; }
.accent { color: var(--cyan-deep); }
b, strong { color: inherit; }

/* ---------------------------------------------------------- 헤더 */
.site-header {
  position: sticky; top: 0; z-index: 1100;
  background: var(--navy); color: #fff;
  box-shadow: 0 1px 0 rgba(255,255,255,.08), 0 2px 12px rgba(8,33,63,.35);
}
.header-inner {
  max-width: 1280px; margin: 0 auto; padding: 0 24px;
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; min-width: 0; }
.brand-mark { width: 32px; height: 32px; border-radius: 8px; flex: none; }
.brand-name { font-weight: 800; font-size: 17px; letter-spacing: -.01em; white-space: nowrap; }
.brand-sub {
  font-size: 12px; color: rgba(255,255,255,.72); border-left: 1px solid rgba(255,255,255,.25);
  padding-left: 10px; white-space: nowrap;
}
.site-nav { display: flex; gap: 4px; }
.site-nav a {
  color: rgba(255,255,255,.85); text-decoration: none; font-size: 14px; font-weight: 600;
  padding: 7px 12px; border-radius: 8px; white-space: nowrap;
}
.site-nav a:hover { background: rgba(255,255,255,.12); color: #fff; }

/* ---------------------------------------------------------- 히어로 */
.hero {
  background:
    radial-gradient(1100px 480px at 82% -140px, rgba(15,163,177,.16), transparent 62%),
    radial-gradient(900px 420px at 8% -80px, rgba(11,46,92,.10), transparent 60%),
    var(--bg);
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
}
.hero-kicker {
  display: inline-block; margin: 0 0 14px;
  font-size: 13px; font-weight: 700; letter-spacing: .02em; color: var(--cyan-deep);
  background: rgba(15,163,177,.10); border: 1px solid rgba(15,163,177,.28);
  padding: 5px 12px; border-radius: 999px;
}
.hero h1 {
  margin: 0 0 18px; font-size: clamp(28px, 4.4vw, 44px); line-height: 1.28;
  font-weight: 800; letter-spacing: -.02em; color: var(--navy);
}
.hero h1 em { color: var(--cyan-deep); }
.hero-lead { max-width: 760px; margin: 0 0 34px; font-size: 17px; color: var(--ink-2); }
.hero-lead strong { color: var(--navy); font-weight: 800; }

.stat-row {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin-bottom: 34px;
}
.stat-tile {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 2px;
}
.stat-tile--accent { border-color: rgba(15,163,177,.45); background: linear-gradient(180deg, rgba(15,163,177,.06), transparent 55%), var(--surface); }
.stat-label { font-size: 12.5px; font-weight: 700; color: var(--ink-2); }
.stat-value { font-size: 28px; font-weight: 800; color: var(--navy); letter-spacing: -.01em; line-height: 1.2; }
.stat-tile--accent .stat-value { color: var(--cyan-deep); }
.stat-note { font-size: 12px; color: var(--ink-3); }

.hero-cta { display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 11px 20px; border-radius: 10px; text-decoration: none;
  font-weight: 700; font-size: 15px; border: 1px solid transparent; cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--navy); color: #fff; box-shadow: 0 6px 18px rgba(11,46,92,.28); }
.btn-primary:hover { background: var(--navy-deep); }
.btn-ghost { background: var(--surface); color: var(--navy); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--navy); }
.btn-sm { padding: 8px 14px; font-size: 13.5px; }

/* ---------------------------------------------------------- 섹션 공통 */
.sec-title {
  margin: 0 0 10px; font-size: clamp(22px, 2.8vw, 30px); font-weight: 800;
  letter-spacing: -.015em; color: var(--navy);
}
.sec-lead { margin: 0 0 26px; max-width: 820px; color: var(--ink-2); }
section { padding: 64px 0; }

/* ---------------------------------------------------------- 지도 */
.map-section { background: var(--surface); border-block: 1px solid var(--border); }
.map-layout {
  display: grid; grid-template-columns: minmax(420px, 46%) 1fr; gap: 22px;
  align-items: start;
}
.map-col { position: sticky; top: calc(var(--header-h) + 14px); }
.map-toolbar {
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  flex-wrap: wrap; margin-bottom: 10px;
}
.mode-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--border); background: var(--surface); color: var(--ink-2);
  font: inherit; font-size: 13.5px; font-weight: 700; padding: 7px 13px;
  border-radius: 999px; cursor: pointer; transition: all .12s ease;
}
.chip:hover { border-color: var(--cyan); color: var(--cyan-deep); }
.chip.is-active { background: var(--navy); border-color: var(--navy); color: #fff; }
.chip-sm { padding: 5px 10px; font-size: 12.5px; }
.layer-toggles { display: flex; gap: 12px; font-size: 13px; color: var(--ink-2); }
.layer-toggles label { display: flex; align-items: center; gap: 5px; cursor: pointer; white-space: nowrap; }
.layer-toggles input { accent-color: var(--navy); }

.map-box {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); box-shadow: var(--shadow);
  background: var(--surface-alt);
}
#map { height: min(calc(100vh - 220px), 720px); min-height: 480px; background: #EDF1F4; }
#map:focus { outline: 2px solid var(--cyan); }
.map-legend {
  position: absolute; left: 10px; bottom: 10px; z-index: 900;
  background: rgba(255,255,255,.94); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 8px 12px; font-size: 11.5px; color: var(--ink-2);
  box-shadow: var(--shadow); backdrop-filter: blur(3px); max-width: 240px;
}
.map-legend .lg-title { font-weight: 800; color: var(--ink); margin-bottom: 5px; font-size: 12px; }
.lg-row { display: flex; align-items: center; gap: 7px; line-height: 1.45; }
.lg-swatch { width: 14px; height: 14px; border-radius: 3px; flex: none; border: 1px solid rgba(0,0,0,.12); }
.lg-dot { width: 10px; height: 10px; border-radius: 50%; flex: none; border: 2px solid #fff; box-shadow: 0 0 0 1px rgba(0,0,0,.2); }
.map-note { margin: 8px 2px 0; font-size: 12px; color: var(--ink-3); }

/* 패널 */
.panel-col {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 18px; min-height: 500px;
}
.panel-search { display: flex; gap: 8px; margin-bottom: 14px; }
.panel-search input {
  flex: 1; font: inherit; font-size: 14px; padding: 9px 13px;
  border: 1px solid var(--border); border-radius: 9px; background: var(--bg);
}
.panel-search input:focus { outline: 2px solid var(--cyan); border-color: transparent; }
.btn-reset {
  font: inherit; font-size: 13px; font-weight: 700; color: var(--navy);
  background: var(--surface-alt); border: 1px solid var(--border); border-radius: 9px;
  padding: 0 14px; cursor: pointer; white-space: nowrap;
}
.btn-reset:hover { border-color: var(--navy); }

.panel-title { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; margin: 4px 0 2px; }
.panel-title h3 { margin: 0; font-size: 21px; font-weight: 800; color: var(--navy); letter-spacing: -.01em; }
.panel-title .sub { font-size: 13px; color: var(--ink-3); }
.grade-pill {
  font-size: 12px; font-weight: 800; padding: 3px 10px; border-radius: 999px;
  background: rgba(15,163,177,.12); color: var(--cyan-deep); border: 1px solid rgba(15,163,177,.3);
}
.kv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 14px 0; }
.kv {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 10px 12px;
}
.kv .k { display: block; font-size: 11.5px; font-weight: 700; color: var(--ink-2); }
.kv .v { display: block; font-size: 19px; font-weight: 800; color: var(--navy); letter-spacing: -.01em; }
.kv .s { display: block; font-size: 11px; color: var(--ink-3); }
.kv--hi { border-color: rgba(15,163,177,.4); background: rgba(15,163,177,.06); }
.kv--hi .v { color: var(--cyan-deep); }

.pred-card {
  margin: 14px 0; padding: 14px 16px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(11,46,92,.045), rgba(15,163,177,.08));
  border: 1px solid rgba(15,163,177,.35);
}
.pred-card h4 { margin: 0 0 8px; font-size: 14px; color: var(--navy); }
.pred-nums { display: flex; gap: 18px; flex-wrap: wrap; }
.pred-nums .pn { display: flex; flex-direction: column; }
.pred-nums .pn b { font-size: 20px; color: var(--cyan-deep); font-weight: 800; }
.pred-nums .pn span { font-size: 11.5px; color: var(--ink-2); }
.pred-note { margin: 8px 0 0; font-size: 11.5px; color: var(--ink-3); }

.panel-libs h4 { margin: 18px 0 8px; font-size: 14px; color: var(--navy); }
.mini-table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.mini-table th {
  text-align: left; font-size: 11px; color: var(--ink-2); font-weight: 700;
  padding: 6px 8px; border-bottom: 1.5px solid var(--border); white-space: nowrap;
}
.mini-table td { padding: 6px 8px; border-bottom: 1px solid var(--surface-alt); }
.mini-table td.num, .mini-table th.num { text-align: right; font-variant-numeric: tabular-nums; }
.mini-table tbody tr { cursor: pointer; }
.mini-table tbody tr:hover { background: rgba(15,163,177,.07); }
.mini-table .lib-name { font-weight: 600; color: var(--ink); }
.panel-empty { color: var(--ink-3); font-size: 13.5px; padding: 20px 4px; }
.panel-natl-list { margin: 6px 0 0; padding: 0; list-style: none; }
.panel-natl-list li {
  display: flex; justify-content: space-between; gap: 10px; padding: 7px 4px;
  border-bottom: 1px solid var(--surface-alt); font-size: 13.5px; cursor: pointer;
}
.panel-natl-list li:hover { background: rgba(15,163,177,.06); }
.panel-natl-list .rk { color: var(--ink-3); font-variant-numeric: tabular-nums; margin-right: 6px; }
.panel-natl-list .val { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--navy); }

/* ---------------------------------------------------------- 근거 카드 */
.evidence { background: var(--bg); }
.ev-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 22px 24px 16px;
}
.card-wide { grid-column: 1 / -1; }
.card h3 { margin: 0 0 14px; font-size: 18.5px; font-weight: 800; color: var(--navy); letter-spacing: -.01em; }
.chart { width: 100%; }
.chart svg { display: block; width: 100%; height: auto; }
.fig-caption { font-size: 13px; color: var(--ink-2); margin: 10px 0 4px; }

.ratio-flex { display: flex; gap: 26px; align-items: center; }
.ratio-hero { flex: none; text-align: center; padding: 0 8px; }
.ratio-big { display: block; font-size: 64px; font-weight: 800; color: var(--cyan-deep); letter-spacing: -.03em; line-height: 1; }
.ratio-sub { font-size: 13px; color: var(--ink-2); font-weight: 700; }
#chart-ratio { flex: 1; }

.hero-figure { font-size: 56px; font-weight: 800; color: var(--cyan-deep); letter-spacing: -.02em; line-height: 1.1; margin: 4px 0 8px; }
.meter { height: 14px; border-radius: 7px; background: var(--ramp-0); overflow: hidden; margin: 12px 0 6px; }
.meter-fill { height: 100%; background: var(--s1); border-radius: 7px 0 0 7px; width: 0; transition: width .8s ease; }
.meter-legend { font-size: 12px; color: var(--ink-2); margin: 0; display: flex; gap: 14px; align-items: center; }
.key { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 5px; vertical-align: -1px; }
.key-fill { background: var(--s1); }
.key-track { background: var(--ramp-0); border: 1px solid var(--border); }

.method, .tbl-view {
  margin-top: 12px; border-top: 1px dashed var(--border); padding-top: 10px;
  font-size: 13px; color: var(--ink-2);
}
.method summary, .tbl-view summary {
  cursor: pointer; font-weight: 700; color: var(--cyan-deep); font-size: 13px;
  list-style-position: inside;
}
.method p, .method ul { margin: 8px 0 4px; }
.method li { margin: 4px 0; }
.limits { background: #FFF8E7; border: 1px solid rgba(201,151,0,.35); border-radius: var(--radius-sm); padding: 12px 16px; margin-top: 18px; }
.limits summary { color: #8a6a00; }

/* 계산기 */
.card-calc { background: linear-gradient(160deg, rgba(11,46,92,.03), rgba(15,163,177,.05)), var(--surface); }
.calc-flex { display: flex; gap: 30px; align-items: center; flex-wrap: wrap; }
.calc-input { flex: 1 1 300px; }
#calc-range { width: 100%; accent-color: var(--cyan-deep); height: 32px; }
.calc-presets { display: flex; gap: 6px; margin-top: 6px; flex-wrap: wrap; }
.calc-out { flex: 1 1 380px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.calc-cell {
  background: var(--surface); border: 1px solid rgba(15,163,177,.35); border-radius: var(--radius-sm);
  padding: 14px 12px; text-align: center;
}
.calc-num { display: block; font-size: 24px; font-weight: 800; color: var(--cyan-deep); letter-spacing: -.01em; }
.calc-lab { display: block; font-size: 11.5px; color: var(--ink-2); font-weight: 700; margin-top: 3px; }

/* ---------------------------------------------------------- 표 */
.table-section { background: var(--surface); border-block: 1px solid var(--border); }
.tbl-controls { display: flex; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.tbl-controls input[type=search], .tbl-controls select {
  font: inherit; font-size: 14px; padding: 9px 13px; border: 1px solid var(--border);
  border-radius: 9px; background: var(--bg);
}
.tbl-controls input[type=search] { flex: 1 1 220px; max-width: 320px; }
.tbl-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.data-table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 760px; }
.data-table thead th {
  position: sticky; top: 0; background: var(--navy); color: #fff; font-size: 12.5px;
  text-align: left; padding: 10px 12px; white-space: nowrap; z-index: 2;
}
.data-table thead th.num { text-align: right; }
.th-sort { cursor: pointer; user-select: none; }
.th-sort:hover { background: var(--navy-deep); }
.th-sort[data-dir="desc"]::after { content: " ▾"; }
.th-sort[data-dir="asc"]::after { content: " ▴"; }
.data-table tbody td { padding: 8px 12px; border-bottom: 1px solid var(--surface-alt); white-space: nowrap; }
.data-table tbody td.num { text-align: right; font-variant-numeric: tabular-nums; }
.data-table tbody tr:hover { background: rgba(15,163,177,.06); }
.data-table tbody tr { cursor: pointer; }
.data-table .dim { color: var(--ink-3); }
.tbl-note { font-size: 12.5px; color: var(--ink-3); margin-top: 10px; }

/* ---------------------------------------------------------- 출처 */
.sources { background: var(--bg); }
.audit-badge { margin: 0 0 16px; }
.audit-ok, .audit-wait {
  display: inline-flex; align-items: center; gap: 9px; padding: 9px 16px;
  border-radius: 999px; font-size: 13.5px; font-weight: 700;
}
.audit-ok { background: rgba(39,174,96,.1); border: 1px solid rgba(39,174,96,.4); color: #1c7c43; }
.audit-wait { background: var(--surface-alt); border: 1px solid var(--border); color: var(--ink-2); }
.src-table { min-width: 900px; }
.src-table td { white-space: normal; }
.src-table .src-name { font-weight: 700; color: var(--navy); }
.src-table .src-name a { color: inherit; }

/* ---------------------------------------------------------- 푸터 */
.site-footer {
  background: var(--navy); color: rgba(255,255,255,.82); padding: 34px 0 44px;
  font-size: 13.5px;
}
.site-footer a { color: #7ED4DC; }
.site-footer p { margin: 5px 0; }
.foot-meta { color: rgba(255,255,255,.55); font-size: 12.5px; }

/* ---------------------------------------------------------- 툴팁 */
.tip {
  position: fixed; z-index: 2000; pointer-events: none;
  background: rgba(17,24,39,.94); color: #fff; font-size: 12.5px; line-height: 1.5;
  padding: 8px 11px; border-radius: 8px; box-shadow: var(--shadow-lg);
  max-width: 260px;
}
.tip b { color: #9EE4EA; }
.tip .tip-title { font-weight: 800; margin-bottom: 2px; }

/* Leaflet 보정 */
.leaflet-container { font-family: var(--font); }
.leaflet-interactive { outline: none !important; transition: fill-opacity .15s ease; }
.leaflet-tooltip.sgg-tip {
  background: rgba(17,24,39,.94); color: #fff; border: none; border-radius: 8px;
  box-shadow: var(--shadow-lg); font-size: 12.5px; padding: 7px 10px;
}
.leaflet-tooltip.sgg-tip::before { display: none; }
.campus-pin { filter: drop-shadow(0 2px 3px rgba(0,0,0,.35)); }

/* ---------------------------------------------------------- 반응형 */
@media (max-width: 1080px) {
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .stat-row .stat-tile:first-child { grid-column: 1 / -1; }
  .map-layout { grid-template-columns: 1fr; }
  .map-col { position: static; }
  #map { height: min(62vh, 560px); min-height: 380px; }
  .ev-grid { grid-template-columns: 1fr; }
  .ratio-flex { flex-direction: column; align-items: stretch; }
  .brand-sub { display: none; }
}
@media (max-width: 640px) {
  section { padding: 44px 0; }
  .hero { padding: 44px 0 36px; }
  .site-nav a { padding: 6px 8px; font-size: 12.5px; }
  .wrap { padding: 0 16px; }
  .calc-out { grid-template-columns: 1fr; }
  .stat-value { font-size: 23px; }
  .ratio-big { font-size: 48px; }
  .hero-figure { font-size: 42px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .meter-fill, .btn, .chip, .leaflet-interactive { transition: none; }
}