/* =========================================================================
   handouts/css/print.css — 인쇄용 핸드아웃 (라이트 테마)
   ========================================================================= */

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Pretendard', 'Pretendard Variable', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  background: #fff;
  color: #1a1a1a;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5rem 2rem 4rem;
}

/* ---- 헤더 (좌우 분할) ---- */
.header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 3px solid #1a1a1a;
  padding-bottom: 0.8rem;
  margin-bottom: 1.5rem;
}
.header-left .session-num {
  display: inline-block;
  background: #1a1a1a;
  color: #fff;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 700;
  border-radius: 4px;
  margin-bottom: 0.4rem;
  letter-spacing: 0.05em;
}
.header-left h1 {
  margin: 0.1rem 0 0;
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.header-right {
  text-align: right;
  font-size: 13px;
  color: #666;
  line-height: 1.4;
}

/* ---- 학습 목표 ---- */
.objectives {
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 0.8rem 1rem;
  margin: 1rem 0;
  background: #fafafa;
}
.objectives h3 {
  margin: 0 0 0.4rem;
  font-size: 0.95rem;
  color: #333;
}
.objectives ul {
  margin: 0;
  padding-left: 1.2rem;
}
.objectives li { margin: 0.2rem 0; font-size: 13px; }

/* ---- 핵심 용어 표 ---- */
.key-terms { margin: 1.2rem 0; }
.key-terms h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: #333;
}
.key-terms table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.key-terms th, .key-terms td {
  border: 1px solid #ddd;
  padding: 0.5rem 0.7rem;
  text-align: left;
  vertical-align: top;
}
.key-terms th {
  background: #f5f5f5;
  font-weight: 700;
}

/* ---- 본문 ---- */
h2 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.6rem;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid #ddd;
}
h3 {
  font-size: 1rem;
  margin: 1rem 0 0.4rem;
  color: #333;
}
p { margin: 0.4rem 0; font-size: 13px; }
ul, ol { padding-left: 1.4rem; font-size: 13px; }
li { margin: 0.2rem 0; }

/* ---- 강조 박스 ---- */
.note {
  border-left: 3px solid #1a1a1a;
  background: #f5f5f5;
  padding: 0.5rem 0.9rem;
  margin: 0.8rem 0;
  font-size: 13px;
  border-radius: 0 4px 4px 0;
}
.note strong { color: #000; }

/* ---- 코드 ---- */
code {
  font-family: 'JetBrains Mono', monospace;
  background: #f5f5f5;
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.9em;
  color: #c0392b;
}
pre {
  background: #f5f5f5;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 0.7rem 1rem;
  overflow-x: auto;
  font-size: 12px;
  line-height: 1.5;
}
pre code {
  background: transparent;
  padding: 0;
  color: #1a1a1a;
}

/* ---- Before / After ---- */
.before-after {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin: 1rem 0;
  font-size: 13px;
}
.before-after .before, .before-after .after {
  padding: 0.6rem 0.9rem;
  border-radius: 4px;
}
.before-after .before {
  background: #fff5f5;
  border: 1px solid #fcc;
}
.before-after .after {
  background: #f0faf0;
  border: 1px solid #bdc;
}
.before-after .label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 0.3rem;
}
.before .label { color: #c00; }
.after .label  { color: #080; }

/* ---- 학습 체크리스트 (CSS가 ☐ 자동 추가) ---- */
.checklist {
  margin: 1.5rem 0 0;
  border-top: 2px dashed #ccc;
  padding-top: 1rem;
}
.checklist h3 { margin: 0 0 0.5rem; font-size: 1rem; }
.checklist ul {
  list-style: none;
  padding-left: 0;
}
.checklist li {
  margin: 0.3rem 0;
  font-size: 13px;
  padding-left: 1.4rem;
  position: relative;
}
.checklist li::before {
  content: '☐';
  position: absolute;
  left: 0;
  font-size: 14px;
}

/* ---- 다이어그램 ---- */
.diagram {
  font-family: 'JetBrains Mono', monospace;
  background: #f5f5f5;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 0.7rem 1rem;
  white-space: pre;
  font-size: 11px;
  line-height: 1.5;
  overflow-x: auto;
  margin: 0.8rem 0;
}

/* ---- 네비게이션 ---- */
.nav {
  display: flex;
  justify-content: space-between;
  gap: 0.6rem;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid #ddd;
  font-size: 13px;
}
.nav a {
  color: #1a1a1a;
  text-decoration: none;
  padding: 0.4rem 0.8rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  flex: 1;
  text-align: center;
}
.nav a:hover { background: #f5f5f5; }

/* ---- 인쇄 최적화 ---- */
@media print {
  @page { margin: 1.5cm; }
  body { font-size: 10pt; line-height: 1.5; }
  .container { padding: 0; max-width: none; }
  h1 { font-size: 16pt; }
  h2 { font-size: 12pt; page-break-after: avoid; }
  h3 { font-size: 10.5pt; page-break-after: avoid; }
  p, li { font-size: 10pt; page-break-inside: avoid; }
  pre, .diagram, .key-terms table { page-break-inside: avoid; }
  .nav { display: none; }
  a { color: #1a1a1a; text-decoration: none; }
  .note { page-break-inside: avoid; }
}