@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700&family=JetBrains+Mono:wght@400;600&display=swap');

:root {
  --background-color: #0a0a0f;
  --section-divider-bg: #07070c;

  --heading-font: "Noto Sans KR", sans-serif;
  --body-font: "Noto Sans KR", sans-serif;
  --mono-font: "JetBrains Mono", "Consolas", "Noto Sans KR", monospace;
  --base-font-size: 32px;
  --text-size: 16pt;
  --h1-size: 44pt;
  --h2-size: 30pt;
  --h3-size: 22pt;
  --footnote-size: 11pt;

  --primary-color: #B165FB;       /* 보라 */
  --secondary-color: #5EE3D1;     /* 시안 */
  --accent-color: #FF6B9D;        /* 핑크 악센트 */
  --text-color: #e8e8f0;
  --muted-color: #8a8a9a;
  --line-color: #2a2a3a;
  --card-bg: rgba(177, 101, 251, 0.06);
  --card-border: rgba(177, 101, 251, 0.25);
  --code-bg: #13131c;

  --slide-padding: 60px;
  --slide-padding-top: 40px;
  --content-gap: 24px;
  --box-radius: 10px;
}

/* ===========================================
   BASE
   =========================================== */

.reveal {
  font-family: var(--body-font);
  font-size: var(--base-font-size);
}

.reveal strong, .reveal b { font-weight: 700; color: #fff; }

.reveal-viewport {
  background-color: var(--background-color);
  background-image: radial-gradient(circle at 1px 1px, rgba(177, 101, 251, 0.08) 1px, transparent 0);
  background-size: 40px 40px;
  animation: gridDrift 6s ease-in-out infinite alternate;
}

@keyframes gridDrift {
  0%   { background-position: 0 0; }
  100% { background-position: 20px 20px; }
}

.reveal-viewport.is-section-divider .slide-background.present {
  background-color: var(--section-divider-bg) !important;
}

.reveal h1, .reveal h2, .reveal h3, .reveal h4, .reveal h5, .reveal h6 {
  font-family: var(--heading-font);
  text-transform: none;
  color: var(--text-color);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.reveal h1 { font-size: var(--h1-size); }
.reveal h2 {
  font-size: var(--h2-size);
  margin-bottom: 0;
  background: linear-gradient(90deg, #fff 0%, var(--primary-color) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.reveal h3 { font-size: var(--h3-size); color: var(--secondary-color); }

.reveal p, .reveal li, .reveal td, .reveal th, .reveal blockquote {
  font-size: var(--text-size);
  color: var(--text-color);
  line-height: 1.55;
}

.reveal code {
  font-family: var(--mono-font);
  background: var(--code-bg);
  color: var(--secondary-color);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.9em;
  border: 1px solid var(--line-color);
}

.reveal pre {
  box-shadow: none;
  margin: 12px 0;
  width: 100%;
}

.reveal pre code {
  display: block;
  padding: 16px 20px;
  background: var(--code-bg);
  border: 1px solid var(--line-color);
  border-left: 3px solid var(--primary-color);
  border-radius: var(--box-radius);
  color: #e0e0ec;
  font-size: 13pt;
  line-height: 1.55;
  max-height: none;
  overflow: visible;
}

/* ===========================================
   LISTS
   =========================================== */

.reveal ul { list-style: none; padding-left: 0; margin: 12px 0; }
.reveal ol { padding-left: 28px; margin: 12px 0; }
.reveal ol li { margin-bottom: 8px; }

.reveal ul li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 8px;
}

.reveal ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px;
  height: 7px;
  background: var(--primary-color);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(177, 101, 251, 0.6);
}

.reveal ul ul li::before {
  background: var(--muted-color);
  width: 5px;
  height: 5px;
  box-shadow: none;
}

/* ===========================================
   LAYOUT
   =========================================== */

.reveal .slides section {
  height: 100%;
  display: flex !important;
  flex-direction: column !important;
  padding: var(--slide-padding-top) var(--slide-padding) var(--slide-padding) var(--slide-padding) !important;
  box-sizing: border-box;
  text-align: left;
}

.reveal .slides section.stack { padding: 0 !important; }

.reveal .slides section > .content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: var(--content-gap);
  text-align: left;
}

.reveal .slides section > .footnote {
  position: absolute;
  bottom: 15px;
  left: var(--slide-padding);
  right: var(--slide-padding);
  font-size: var(--footnote-size);
  color: var(--muted-color);
}

/* 상단 데코 라인 */
.reveal .slides section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary-color), var(--secondary-color), var(--primary-color), transparent);
  background-size: 200% 100%;
  animation: lineFlow 4s linear infinite;
}

@keyframes lineFlow {
  0%   { background-position: 0% 0; }
  100% { background-position: 200% 0; }
}

.reveal .slides section.section-divider::before { display: none; }

/* ===========================================
   SECTION DIVIDERS
   =========================================== */

.reveal .slides section.section-divider {
  display: flex !important;
  flex-direction: column !important;
  justify-content: center !important;
  align-items: center !important;
  text-align: center;
}

.reveal .slides section.section-divider h1 {
  font-size: 56pt;
  text-align: center;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: dividerGlow 5s ease-in-out infinite;
}

@keyframes dividerGlow {
  0%, 100% { text-shadow: 0 0 30px rgba(177, 101, 251, 0.5), 0 0 60px rgba(94, 227, 209, 0.2); }
  50%      { text-shadow: 0 0 50px rgba(177, 101, 251, 0.8), 0 0 90px rgba(94, 227, 209, 0.4); }
}

.reveal .slides section.section-divider p {
  font-size: 18pt;
  color: var(--muted-color);
  margin-top: 20px;
}

/* ===========================================
   TEXT UTILITIES
   =========================================== */

.text-lg { font-size: 18pt !important; }
.text-xl { font-size: 20pt !important; }
.text-2xl { font-size: 24pt !important; }
.text-3xl { font-size: 28pt !important; }
.text-4xl { font-size: 32pt !important; }
.text-muted { color: var(--muted-color) !important; }
.text-center { text-align: center !important; }
.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--secondary-color) !important; }
.text-mono { font-family: var(--mono-font) !important; }

/* ===========================================
   COMPONENTS
   =========================================== */

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--box-radius);
  padding: 18px 22px;
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}

.card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 0 25px rgba(177, 101, 251, 0.3);
  transform: translateY(-2px);
}

.card.fragment.visible {
  animation: cardShine 1.6s ease-out;
}

@keyframes cardShine {
  0%   { box-shadow: 0 0 0 rgba(177, 101, 251, 0); }
  50%  { box-shadow: 0 0 30px rgba(177, 101, 251, 0.5); }
  100% { box-shadow: 0 0 0 rgba(177, 101, 251, 0); }
}

.card h3 {
  margin: 0 0 8px 0;
  font-size: 18pt;
}

.card p { margin: 0; }

.badge {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(94, 227, 209, 0.12);
  border: 1px solid var(--secondary-color);
  color: var(--secondary-color);
  border-radius: 20px;
  font-size: 12pt;
  font-weight: 500;
  font-family: var(--mono-font);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: #0a0a0f;
  -webkit-text-fill-color: #0a0a0f;
  font-weight: 700;
  font-size: 18pt;
  margin-right: 14px;
  flex-shrink: 0;
  vertical-align: middle;
}

/* ===========================================
   TABLES
   =========================================== */

.reveal table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}

.reveal table th {
  background: rgba(177, 101, 251, 0.12);
  color: var(--primary-color);
  padding: 12px 16px;
  text-align: left;
  border: 1px solid var(--line-color);
  font-weight: 600;
}

.reveal table td {
  padding: 12px 16px;
  border: 1px solid var(--line-color);
  color: var(--text-color);
}

/* ===========================================
   BLOCKQUOTES
   =========================================== */

.reveal blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: 20px;
  margin: 20px 0;
  font-style: italic;
  background: none;
  box-shadow: none;
  width: 100%;
  max-width: none;
}

.reveal blockquote cite {
  display: block;
  margin-top: 10px;
  font-style: normal;
  color: var(--muted-color);
}

/* ===========================================
   PROGRESS BAR
   =========================================== */

.reveal .progress { height: 3px; color: var(--primary-color); }
.reveal .progress span {
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.reveal .slide-number {
  background: rgba(10, 10, 15, 0.6);
  color: var(--muted-color);
  font-family: var(--mono-font);
}

.reveal .controls { color: var(--primary-color); }