/* ============================================================
   Lecture · 데이터베이스 관리 시스템(DBMS) (3과목) — slide layout extensions
   Builds on /colors_and_type.css and /slides/_slide.css
   ─ 20강 데이터베이스개요 lecture.css 전체 계승(20강은 22강을 계승)
     + 22강 dg-box/dg-bt/dg-arr/dg-flab 라벨 박스 흐름 프리미티브 합본.
   ─ 신규 클래스 없음 — 정조제/계네관객 두문자 카드(comp-grid) · 계층(트리)/
     네트워크(그래프) 노드 도식(tree-frame + dg-line/dg-edge/dg-node/dg-leaf/
     dg-root) · 사용자→DBMS→DB 흐름(flow) · 독립성/함정(cmp-tbl·trap-row) 은
     코어(def-box·metaphor·mnemonic·real·pass-tip·cmp-tbl·trap-row·q-source·
     tbl.compact·callout.compact) + obj-grid/comp-grid/flow/dg-* 재사용.
   ============================================================ */

/* ---------- 4-objective grid (학습 목표) — 08·10강 패턴 재사용 ---------- */
.obj-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.obj-item {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 16px;
  align-items: center;
  padding: 16px 20px;
  background: var(--ink-50);
  border: 1.5px solid var(--ink-200);
  border-radius: 12px;
}
.obj-item .badge {
  width: 52px;
  height: 52px;
  background: var(--eduwill-yellow);
  color: var(--ink-1000);
  display: grid;
  place-items: center;
  font: 800 26px/1 var(--font-sans);
  border-radius: 12px;
}
.obj-item h3 { margin: 0; font: 800 18px/1.15 var(--font-sans); color: var(--ink-1000); }
.obj-item p  { margin: 4px 0 0; font-size: 13px; color: var(--ink-700); line-height: 1.4; }

/* ============================================================
   흐름 노드 행 — A → B → C inline 시퀀스 (사용자→DBMS→DB)
   08·10·11강 .flow 재사용
   ============================================================ */
.flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.flow .box {
  padding: 10px 16px;
  border-radius: 10px;
  background: white;
  border: 1.5px solid var(--ink-300);
  font: 700 16px/1.2 var(--font-sans);
  color: var(--ink-900);
  text-align: center;
}
.flow .box.dark { background: var(--ink-1000); color: white; border-color: var(--ink-1000); }
.flow .box.mid  { background: var(--eduwill-yellow); color: var(--ink-1000); border-color: var(--eduwill-yellow); font-weight: 800; }
.flow .box small { display: block; font-size: 11px; font-weight: 600; opacity: 0.7; margin-top: 2px; }
.flow .arw { color: var(--ink-500); font-size: 20px; font-weight: 800; }

/* ============================================================
   SVG diagram primitives — 트리·그래프 노드/간선 (08·10·11강 dg-* 재사용)
   계층형(트리·1:N) / 네트워크형(그래프·N:M) 도식에 사용.
   ============================================================ */
.dg-line   { stroke: var(--ink-300); stroke-width: 2; }
.dg-line-y { stroke: var(--eduwill-yellow-600); stroke-width: 2.5; }
.dg-edge   { stroke: var(--ink-400); stroke-width: 2.5; }
.dg-edge-y { stroke: var(--eduwill-yellow-600); stroke-width: 3; }
.dg-node   { fill: var(--ink-1000); }
.dg-node-t { fill: white; font: 800 15px var(--font-sans); text-anchor: middle; dominant-baseline: central; }
.dg-leaf   { fill: var(--eduwill-yellow); stroke: var(--ink-1000); stroke-width: 2; }
.dg-leaf-t { fill: var(--ink-1000); font: 800 15px var(--font-sans); text-anchor: middle; dominant-baseline: central; }
.dg-root   { fill: var(--ink-1000); stroke: var(--eduwill-yellow); stroke-width: 3.5; }
.dg-cap    { fill: var(--ink-500); font: 700 12px var(--font-sans); text-anchor: middle; }
.dg-op     { fill: var(--info-500); }

/* 라벨 박스 흐름 SVG primitives — 수평 박스 시퀀스 (22강 계승) */
.dg-box   { fill: white; stroke: var(--ink-300); stroke-width: 2; rx: 8; }
.dg-box-d { fill: var(--ink-1000); stroke: var(--ink-1000); }
.dg-box-y { fill: var(--eduwill-yellow); stroke: var(--eduwill-yellow-600); }
.dg-bt    { fill: var(--ink-1000); font: 800 13px var(--font-sans); text-anchor: middle; dominant-baseline: central; }
.dg-bt-w  { fill: white; font: 800 13px var(--font-sans); text-anchor: middle; dominant-baseline: central; }
.dg-arr   { stroke: var(--ink-400); stroke-width: 2.5; fill: none; marker-end: url(#ah); }
.dg-arr-y { stroke: var(--eduwill-yellow-600); stroke-width: 3; fill: none; marker-end: url(#ahy); }
.dg-flab  { fill: var(--ink-500); font: 700 11px var(--font-sans); text-anchor: middle; }

/* 트리/그래프 도식 프레임 */
.tree-frame {
  background: var(--ink-50);
  border: 1.5px solid var(--ink-200);
  border-radius: 12px;
  padding: 12px;
  display: grid;
  place-items: center;
}
.tree-frame.hi { background: var(--eduwill-yellow-50); border-color: var(--eduwill-yellow); }
.tree-frame svg { width: 100%; height: auto; max-height: 220px; display: block; }
.tree-frame .cap { margin-top: 6px; font-size: 12px; color: var(--ink-500); font-weight: 600; text-align: center; }

/* ---------- utility: small caption ---------- */
.cap { font-size: 12px; color: var(--ink-500); }

/* ============================================================
   단계 카드 그리드 — 키워드 카드 가로 결합 (11강 algo-card 결 계승)
   ============================================================ */
.step-grid { display: grid; gap: 10px; }
.step-grid.c2 { grid-template-columns: 1fr 1fr; }
.step-grid.c4 { grid-template-columns: repeat(4, 1fr); }
.step-card {
  background: white;
  border: 1.5px solid var(--ink-200);
  border-radius: 12px;
  border-left: 5px solid var(--eduwill-yellow);
  padding: 12px 16px;
}
.step-card.gray { border-left-color: var(--ink-1000); }
.step-card.info { border-left-color: var(--info-500); }
.step-card .hd { display: flex; align-items: baseline; gap: 10px; }
.step-card .hd .nm { font: 800 16px/1 var(--font-sans); color: var(--ink-1000); }
.step-card .hd .badge2 { margin-left: auto; font: 800 13px/1 var(--font-mono); color: var(--eduwill-yellow-700); }
.step-card .bd { margin-top: 6px; font-size: 13px; line-height: 1.45; color: var(--ink-800); }
.step-card .bd b { color: var(--ink-1000); }

/* ============================================================
   4글자 두문자 카드 그리드 — 정조제(3)·계네관객(4) 글자별 카드
   (comp-grid 결 계승 · 3·4컬럼)
   ============================================================ */
.comp-grid { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 10px; }
.comp-grid.c3 { grid-template-columns: 1fr 1fr 1fr; }
.comp-card {
  background: white;
  border: 1.5px solid var(--ink-200);
  border-top: 5px solid var(--eduwill-yellow);
  border-radius: 10px;
  padding: 12px 13px;
  text-align: center;
}
.comp-card.dark { border-top-color: var(--ink-1000); }
.comp-card .ch { font: 800 30px/1 var(--font-sans); color: var(--eduwill-yellow-700); }
.comp-card .nm { font: 800 15px/1.2 var(--font-sans); color: var(--ink-1000); letter-spacing: -0.01em; margin-top: 6px; }
.comp-card .en { font-size: 11px; color: var(--ink-500); font-weight: 700; letter-spacing: 0.02em; margin-top: 2px; }
.comp-card .ds { font-size: 11.5px; color: var(--ink-700); line-height: 1.4; margin-top: 6px; }
.comp-card .ds b { color: var(--ink-1000); }

/* ============================================================
   푸터 안전영역(y≤672) 압축 — 22강 검증값 계승
   _slide.css 코어보다 뒤에 로드되므로 이 데크에만 적용됨.
   ============================================================ */
.slide-content { gap: 22px; }

.def-box { grid-template-columns: 132px 1fr; }
.def-box .term { padding: 16px 12px; }
.def-box .term .abbr { font-size: 30px; letter-spacing: -0.02em; line-height: 1.05; }
.def-box .term .full { font-size: 10px; margin-top: 5px; line-height: 1.25; word-break: keep-all; }
.def-box .body { padding: 16px 22px; }
.def-box .body .label { font-size: 11px; }
.def-box .body .text { font-size: 16px; line-height: 1.5; margin-top: 4px; }

.metaphor { padding: 13px 18px; }
.metaphor .icon { width: 38px; height: 38px; font-size: 18px; }
.metaphor .text { font-size: 14.5px; line-height: 1.45; }

.pass-tip, .real, .callout.compact { padding: 12px 18px; }
.pass-tip .text, .real .text { font-size: 14.5px; line-height: 1.45; }
.mnemonic { padding: 13px 20px; }
.mnemonic .phrase { font-size: 18px; }

/* cmp-tbl 압축 변형 (안전영역 보존) */
.cmp-tbl.compact { font-size: 14px; }
.cmp-tbl.compact thead th { padding: 8px 14px; font-size: 13px; }
.cmp-tbl.compact tbody td { padding: 8px 14px; }
.cmp-tbl.compact tbody td:first-child { width: 110px; }