/* edu-page-02-intro.css — 도입 3페이지: 프로젝트 미션 선언 (미니멀) */

.onto-intro {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: min(74vh, 760px);
  padding: 36px 24px 28px;
  text-align: center;
}

.onto-intro-bg {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0.85;
}

.onto-intro-bg svg {
  width: min(920px, 100%);
  height: auto;
}

.onto-intro-mission {
  position: relative;
  z-index: 1;
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.onto-intro-title {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.onto-intro-en {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.08;
  color: var(--text);
}

.onto-plus {
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0;
}

.onto-intro-ko {
  font-size: clamp(20px, 2.8vw, 28px);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-muted);
}

.onto-intro-lede {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0;
  font-size: clamp(15px, 1.9vw, 18px);
  font-weight: 500;
  line-height: 1.75;
  color: var(--text-dim);
}

.onto-intro-lede strong {
  color: var(--accent);
  font-weight: 800;
}

.onto-hero-visual {
  position: relative;
  z-index: 1;
  width: min(880px, 100%);
  margin: 22px auto 0;
  text-align: center;
}

.onto-onto-block,
.onto-kg-block {
  text-align: center;
}

.onto-block-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  margin-bottom: 14px;
}

.onto-block-label {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #0f766e;
}

.onto-block-label-onto {
  color: #475569;
}

.onto-block-sub {
  font-size: 13px;
  font-weight: 600;
  color: #94a3b8;
}

.onto-pillar-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 720px;
  margin: 0 auto;
}

.onto-pillar-card {
  padding: 18px 14px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(100, 116, 139, 0.16);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.04);
  text-align: center;
}

.onto-pillar-card-rule {
  background: rgba(255, 251, 235, 0.72);
  border-color: rgba(217, 119, 6, 0.18);
}

.onto-pillar-en {
  display: block;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #94a3b8;
}

.onto-pillar-card-rule .onto-pillar-en {
  color: #b45309;
}

.onto-pillar-ko {
  display: block;
  margin-top: 4px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.onto-pillar-card p {
  margin: 10px 0 0;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.65;
  color: #64748b;
}

.onto-stack-caption {
  position: relative;
  margin: 20px 0 22px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #0f766e;
}

.onto-stack-caption::before,
.onto-stack-caption::after {
  content: "";
  display: inline-block;
  width: 48px;
  height: 1px;
  margin: 0 12px;
  vertical-align: middle;
  background: linear-gradient(90deg, transparent, rgba(15, 118, 110, 0.35));
}

.onto-stack-caption::after {
  background: linear-gradient(90deg, rgba(15, 118, 110, 0.35), transparent);
}

.onto-kg-svg {
  display: block;
  width: 100%;
  height: auto;
}

.hero-links line {
  stroke: #e2e8f0;
  stroke-width: 1.3;
}

.hero-links-hot line {
  stroke: #0f766e;
  stroke-width: 2;
  opacity: 0.75;
}

.hero-nodes circle {
  fill: #fff;
  stroke: rgba(15, 118, 110, 0.38);
  stroke-width: 1.4;
}

.hero-nodes text {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 800;
  text-anchor: middle;
  fill: #0f172a;
}

.hero-node-muted circle {
  fill: #f8fafc;
  stroke: rgba(148, 163, 184, 0.5);
}

.hero-node-muted text {
  font-size: 10px;
  font-weight: 700;
  fill: #64748b;
}

.hero-rag-pill {
  fill: rgba(240, 253, 250, 0.9);
  stroke: rgba(15, 118, 110, 0.22);
  stroke-width: 1.2;
}

.hero-rag-label {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  fill: #0f766e;
}

.onto-intro-bridge {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 18px 0 0;
  font-size: clamp(16px, 2.2vw, 20px);
  font-weight: 700;
  line-height: 1.65;
  color: var(--text);
}

.onto-intro-bridge strong {
  color: var(--accent);
  font-weight: 800;
}

.onto-intro-footer {
  margin-top: 8px;
  padding: 28px 24px 12px;
  text-align: center;
  border-top: 1px solid var(--border-soft);
}

.onto-intro-footer p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-muted);
}

@media (max-width: 720px) {
  .onto-pillar-cards {
    grid-template-columns: 1fr;
    max-width: 320px;
    gap: 10px;
  }

  .onto-pillar-card {
    padding: 14px 16px;
  }

  .onto-pillar-ko {
    font-size: 18px;
  }

  .onto-stack-caption::before,
  .onto-stack-caption::after {
    width: 24px;
    margin: 0 8px;
  }
}

@media (max-width: 640px) {
  .onto-intro {
    min-height: 52vh;
    padding-top: 28px;
  }

  .onto-hero-visual {
    width: 100%;
    margin-top: 18px;
  }

  .onto-intro-en {
    font-size: clamp(28px, 8vw, 40px);
  }
}