/* =========================================================================
   slides/css/custom.css — 발표용 슬라이드 (reveal.js night 위에 덧씌움)
   ========================================================================= */

:root {
  --main-bg: #1a1a2e;
  --card-bg: #16213e;
  --accent-orange: #f39c12;
  --accent-blue: #3498db;
  --accent-green: #2ecc71;
  --accent-red: #e74c3c;
  --accent-purple: #9b59b6;
  --accent-teal: #1abc9c;
  --text: #ecf0f1;
  --text-muted: #bdc3c7;
  --border: #34495e;
  --code-bg: #0d1117;
}

/* ---- 전역 ---- */
.reveal {
  font-family: 'Pretendard', 'Pretendard Variable', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  color: var(--text);
}
.reveal .slides { text-align: left; }
.reveal h1, .reveal h2, .reveal h3, .reveal h4 {
  font-family: 'Pretendard', sans-serif;
  font-weight: 700;
  text-transform: none;
  letter-spacing: -0.02em;
}
.reveal h1 { color: var(--text); font-size: 2.4em; }
.reveal h2 { color: var(--accent-blue); font-size: 1.6em; margin-bottom: 0.5em; }
.reveal h3 { color: var(--accent-green); font-size: 1.15em; }
.reveal p, .reveal li { line-height: 1.55; }
.reveal a { color: var(--accent-blue); }

/* ---- 배경 ---- */
.reveal .backgrounds, .reveal-viewport {
  background: linear-gradient(180deg, var(--main-bg) 0%, #0f0f1e 100%);
}

/* ---- 타이틀 슬라이드 ---- */
.session-title {
  text-align: center;
  padding: 1.2em 0;
}
.session-title .session-glyph {
  font-size: 0.8em;
  color: var(--accent-orange);
  letter-spacing: 0.1em;
  margin-bottom: 0.3em;
  display: block;
}
.session-title h1 {
  font-size: 2.6em;
  margin: 0.2em 0;
  background: linear-gradient(90deg, var(--accent-orange) 0%, var(--accent-red) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.session-title .subtitle {
  color: var(--text-muted);
  font-size: 0.6em;
  margin-top: 0.4em;
}

/* ---- 버전 뱃지 (우측 상단) ---- */
.version-badge {
  position: absolute;
  top: 16px;
  right: 18px;
  padding: 4px 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
  color: white;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 12px rgba(243, 156, 18, 0.35);
  z-index: 30;
}

/* ---- 학습 목표 ---- */
.objectives {
  background: linear-gradient(135deg, rgba(52, 152, 219, 0.15) 0%, rgba(52, 152, 219, 0.05) 100%);
  border: 2px solid var(--accent-blue);
  border-radius: 14px;
  padding: 1em 1.4em;
  margin: 0.5em 0;
}
.objectives ul { list-style: none; padding: 0; margin: 0; }
.objectives li {
  padding: 0.4em 0;
  padding-left: 1.4em;
  position: relative;
}
.objectives li::before {
  content: '◆';
  color: var(--accent-orange);
  position: absolute;
  left: 0;
  top: 0.4em;
}

/* ---- 핵심 용어 ---- */
.keyword {
  color: var(--accent-orange);
  font-weight: 700;
  padding: 0 4px;
}
.highlight {
  background: rgba(243, 156, 18, 0.25);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ---- 박스 4종 ---- */
.info-box, .tip-box, .warning-box, .danger-box {
  border-left: 4px solid;
  padding: 0.7em 1em;
  margin: 0.6em 0;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 0 8px 8px 0;
}
.info-box    { border-left-color: var(--accent-blue); }
.tip-box     { border-left-color: var(--accent-green); }
.warning-box { border-left-color: var(--accent-orange); }
.danger-box  { border-left-color: var(--accent-red); }
.info-box .box-title    { color: var(--accent-blue); }
.tip-box .box-title     { color: var(--accent-green); }
.warning-box .box-title { color: var(--accent-orange); }
.danger-box .box-title  { color: var(--accent-red); }
.box-title {
  font-weight: 700;
  margin-bottom: 0.3em;
  font-size: 0.95em;
}

/* ---- 4단계 패턴: 불편 / 새 도구 / Before-After ---- */
.pain-point {
  background: linear-gradient(135deg, rgba(231, 76, 60, 0.18), rgba(231, 76, 60, 0.04));
  border: 2px dashed var(--accent-red);
  border-radius: 12px;
  padding: 0.8em 1.2em;
  margin: 0.6em 0;
  position: relative;
}
.pain-point::before {
  content: '⚠️';
  position: absolute;
  left: -14px;
  top: -14px;
  background: var(--main-bg);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 2px solid var(--accent-red);
}
.pain-point .pain-title {
  color: var(--accent-red);
  font-weight: 700;
  margin-bottom: 0.25em;
}

.new-tool {
  background: linear-gradient(135deg, rgba(46, 204, 113, 0.15), rgba(46, 204, 113, 0.03));
  border: 2px solid var(--accent-green);
  border-radius: 12px;
  padding: 0.8em 1.2em;
  margin: 0.6em 0;
  position: relative;
}
.new-tool::before {
  content: '🛠️';
  position: absolute;
  left: -14px;
  top: -14px;
  background: var(--main-bg);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 2px solid var(--accent-green);
}
.new-tool .tool-title {
  color: var(--accent-green);
  font-weight: 700;
  margin-bottom: 0.25em;
}

.before-after {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1em;
  align-items: stretch;
  margin: 0.6em 0;
}
.before-after .before, .before-after .after {
  padding: 0.8em 1em;
  border-radius: 10px;
  font-size: 0.85em;
}
.before-after .before {
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid rgba(231, 76, 60, 0.4);
}
.before-after .after {
  background: rgba(46, 204, 113, 0.1);
  border: 1px solid rgba(46, 204, 113, 0.4);
}
.before-after .arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6em;
  color: var(--accent-orange);
}
.before-after .label {
  font-size: 0.75em;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 0.3em;
}
.before .label { color: var(--accent-red); }
.after .label  { color: var(--accent-green); }

/* ---- 데이터 흐름도 ---- */
.flow-diagram {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2em;
  margin: 0.5em 0;
  text-align: center;
}
.flow-diagram .flow {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.4em;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75em;
}
.flow-diagram .box {
  padding: 0.5em 0.9em;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
}
.flow-diagram .box.new {
  border-color: var(--accent-orange);
  color: var(--accent-orange);
  box-shadow: 0 0 14px rgba(243, 156, 18, 0.4);
  background: rgba(243, 156, 18, 0.1);
}
.flow-diagram .box.empty {
  border-style: dashed;
  opacity: 0.4;
}
.flow-diagram .arrow {
  color: var(--accent-blue);
  font-weight: 700;
}
.flow-diagram .caption {
  font-size: 0.65em;
  color: var(--text-muted);
  margin-top: 0.6em;
}
.flow-diagram .caption .new-mark {
  color: var(--accent-orange);
  font-weight: 700;
}

/* ---- 다이어그램 (텍스트 아트) ---- */
.diagram {
  font-family: 'JetBrains Mono', monospace;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1em 1.2em;
  white-space: pre;
  font-size: 0.62em;
  line-height: 1.5;
  color: var(--text);
  overflow: auto;
}

/* ---- 2단 레이아웃 ---- */
.columns { display: flex; gap: 1.2em; }
.col { flex: 1; }

/* ---- 단계별 가이드 ---- */
.step {
  display: flex;
  gap: 0.8em;
  margin: 0.6em 0;
  align-items: flex-start;
}
.step-number {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
  color: white;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step-content { flex: 1; }

/* ---- 퀴즈 / 정리 ---- */
.quiz-question {
  border: 2px solid var(--accent-purple);
  background: rgba(155, 89, 182, 0.1);
  border-radius: 12px;
  padding: 1em 1.2em;
  margin: 0.6em 0;
}
.summary {
  border: 2px solid var(--accent-green);
  background: linear-gradient(135deg, rgba(46, 204, 113, 0.15), rgba(46, 204, 113, 0.03));
  border-radius: 14px;
  padding: 1em 1.4em;
}

/* ---- 코드 블록 ---- */
.reveal pre {
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
  border-radius: 10px;
  font-size: 0.55em;
}
.reveal pre code {
  font-family: 'JetBrains Mono', monospace;
  padding: 1em 1.2em;
  border-radius: 10px;
  max-height: 480px;
  background: var(--code-bg);
}

/* ---- fragment 애니메이션 ---- */
.fragment.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
}
.fragment.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- 스크린샷 자리 ---- */
.screenshot {
  background: rgba(255, 255, 255, 0.03);
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 1em;
  text-align: center;
  margin: 0.5em 0;
}
.screenshot .label {
  color: var(--text-muted);
  font-size: 0.7em;
  letter-spacing: 0.1em;
}
.screenshot .desc {
  color: var(--text);
  font-size: 0.85em;
  margin-top: 0.3em;
}

/* ---- 반응형 ---- */
@media (max-width: 1024px) {
  .reveal { font-size: 24px; }
}
@media (max-width: 768px) {
  .columns { flex-direction: column; }
  .before-after { grid-template-columns: 1fr; }
  .before-after .arrow { transform: rotate(90deg); }
}