/* ═══ ONE ENGINE — RIDM engine → saju domain → routes ═══ */
.oe {
  --oe-bg: #05050c;
  --oe-surface: rgba(255, 255, 255, 0.035);
  --oe-line: rgba(255, 255, 255, 0.09);
  --oe-text: #fff;
  --oe-muted: rgba(255, 255, 255, 0.55);
  --oe-faint: rgba(255, 255, 255, 0.32);
  --oe-saju: #e2683c;
  --oe-ai: #4f8ff7;
  --oe-inta: #8b7fe8;
  --oe-hrum: #2f6feb;
  --oe-eng: #22c55e;
  --oe-ease: cubic-bezier(0.16, 1, 0.3, 1);

  position: relative;
  background: var(--oe-bg);
  background-image:
    radial-gradient(ellipse 70% 45% at 50% 100%, rgba(79, 143, 247, 0.10), transparent 70%),
    radial-gradient(ellipse 50% 40% at 25% 55%, rgba(226, 104, 60, 0.07), transparent 70%);
  color: var(--oe-text);
  word-break: keep-all;
  overflow-wrap: anywhere;
  padding: clamp(120px, 14vw, 170px) 24px clamp(64px, 8vw, 110px);
  overflow: hidden;
}
.oe__inner { max-width: 1120px; margin: 0 auto; }

/* ── Head ── */
.oe__head { max-width: 760px; margin-bottom: clamp(40px, 6vw, 72px); }
.oe__eyebrow {
  font: 500 11px 'Poppins', sans-serif;
  letter-spacing: 6px;
  text-transform: uppercase;
  color: var(--oe-faint);
  margin: 0 0 20px;
}
.oe__title {
  font: 800 clamp(40px, 1.5rem + 5vw, 88px)/1.02 'Noto Sans KR', 'Poppins', sans-serif;
  letter-spacing: -0.04em;
  margin: 0 0 24px;
}
.oe__title em { font-style: normal; color: var(--oe-saju); }
.oe__lede {
  font: 400 clamp(16px, 0.9rem + 0.4vw, 19px)/1.75 'Pretendard', 'Noto Sans KR', sans-serif;
  color: var(--oe-muted);
  margin: 0;
}
.oe__lede strong { color: var(--oe-text); font-weight: 600; }

/* ── Stack ── */
.oe__stack { display: flex; flex-direction: column; gap: 14px; }

.oe__routes {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 14px;
}
.oe__wing-label {
  font: 600 12px 'Poppins', sans-serif;
  letter-spacing: 4px;
  color: var(--oe-saju);
  margin: 0 0 12px;
}
.oe__wing-label span { opacity: 0.5; margin-right: 6px; }
.oe__wing--ai .oe__wing-label { color: var(--oe-ai); }

.oe__cards { display: grid; gap: 10px; }
.oe__wing--saju .oe__cards { grid-template-columns: repeat(3, 1fr); }
.oe__wing--ai .oe__cards { grid-template-columns: 3fr 2fr; align-items: end; }

/* ── Blogs row (under SAJU cards) ── */
.oe__blogs {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  margin: 14px 0 0;
  font-size: 13px;
  color: var(--oe-muted);
}
.oe__blogs-label {
  font: 600 11px 'Poppins', sans-serif;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--oe-faint);
}
.oe__blogs a {
  color: var(--oe-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--oe-line);
  transition: color 0.2s var(--oe-ease), text-decoration-color 0.2s var(--oe-ease);
}
.oe__blogs a:hover,
.oe__blogs a:focus-visible { color: var(--oe-text); text-decoration-color: currentColor; }

/* ── Route cards ── */
.oe-card {
  --c: var(--oe-saju);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 20px 20px;
  min-height: 210px;
  border-radius: 14px;
  background: var(--oe-surface);
  border: 1px solid var(--oe-line);
  color: inherit;
  text-decoration: none;
  transition: transform 0.4s var(--oe-ease), border-color 0.3s ease, background 0.3s ease;
}
.oe-card::after {
  /* connector stub toward the layer below */
  content: '';
  position: absolute;
  left: 50%;
  bottom: -15px;
  width: 1px;
  height: 14px;
  background: linear-gradient(var(--c), transparent);
  opacity: 0.6;
}
a.oe-card:hover,
a.oe-card:focus-visible {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--c) 55%, transparent);
  background: color-mix(in srgb, var(--c) 7%, transparent);
}
a.oe-card:focus-visible { outline: 2px solid var(--c); outline-offset: 3px; }
.oe-card--inta { --c: var(--oe-inta); }
.oe-card--academy { --c: #b32b18; border-style: dashed; }
.oe-card--academy .oe-card__route { color: #ce7569; }
.oe-card--hrum { --c: var(--oe-hrum); }
.oe-card__name small { font-size: 0.6em; font-weight: 500; color: var(--oe-faint); margin-left: 4px; }
.oe-card__logo--glyph img { width: 30px; height: auto; }
.oe-card--ridm { --c: var(--oe-ai); }
.oe-card--eng { --c: var(--oe-eng); }

.oe-card__logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: contain;
  margin-bottom: 10px;
}
.oe-card__logo--glyph {
  display: grid;
  place-items: center;
  color: var(--c);
  background: color-mix(in srgb, var(--c) 12%, transparent);
}
.oe-card__route {
  font: 500 11px 'Poppins', sans-serif;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--c);
}
.oe-card__route em { font-style: normal; opacity: 0.7; }
.oe-card__name {
  font: 700 20px 'Poppins', 'Noto Sans KR', sans-serif;
  letter-spacing: -0.02em;
}
.oe-card__desc {
  font: 400 14px/1.6 'Pretendard', 'Noto Sans KR', sans-serif;
  color: var(--oe-muted);
}

/* Eng Helper — intentionally small, a side idea */
.oe-card--mini { min-height: 0; padding: 14px 16px; gap: 4px; }
.oe-card--mini .oe-card__name { font-size: 15px; }
.oe-card--mini .oe-card__desc { font-size: 12.5px; }
.oe-card--mini .oe-card__route { font-size: 10px; }

/* ── Layers ── */
.oe__mid { display: grid; grid-template-columns: 3fr 2fr; gap: 14px; }
.oe-layer {
  border-radius: 14px;
  padding: 20px 22px;
  border: 1px solid var(--oe-line);
}
.oe-layer--domain {
  background: linear-gradient(90deg, rgba(226, 104, 60, 0.16), rgba(226, 104, 60, 0.05));
  border-color: rgba(226, 104, 60, 0.35);
}
.oe-layer--engine {
  background: linear-gradient(90deg, rgba(79, 143, 247, 0.20), rgba(139, 127, 232, 0.10) 60%, rgba(226, 104, 60, 0.10));
  border-color: rgba(79, 143, 247, 0.4);
  padding: 26px 24px;
}
.oe-layer__row { display: flex; align-items: baseline; flex-wrap: wrap; gap: 8px 20px; }
.oe-layer__name {
  font: 700 13px 'Poppins', 'Noto Sans KR', sans-serif;
  letter-spacing: 4px;
  text-transform: uppercase;
  margin: 0 0 14px;
}
.oe-layer--engine .oe-layer__name { font-size: clamp(18px, 1rem + 1vw, 26px); letter-spacing: 6px; }
.oe-layer__acronym {
  font: 400 13px 'Poppins', sans-serif;
  color: var(--oe-muted);
  margin: 0 0 14px;
}
.oe-layer__acronym b { color: var(--oe-text); font-weight: 700; }
.oe-layer__chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; }
.oe-layer__chips li {
  font: 500 13px 'Pretendard', 'Noto Sans KR', sans-serif;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.8);
}
.oe-layer__chips li.is-key { background: rgba(255, 255, 255, 0.92); color: #0b0b14; font-weight: 700; }

/* AI wing bypasses the saju layer — two rails straight to the engine */
.oe__pass {
  display: flex;
  justify-content: space-around;
  align-items: stretch;
  padding: 0 18%;
}
.oe__pass span {
  width: 1px;
  background: repeating-linear-gradient(to bottom, var(--oe-ai) 0 6px, transparent 6px 12px);
  opacity: 0.55;
}

.oe__foot {
  margin: clamp(28px, 4vw, 44px) 0 0;
  font: 400 15px/1.7 'Pretendard', 'Noto Sans KR', sans-serif;
  color: var(--oe-faint);
  max-width: 760px;
}
.oe__foot strong { color: var(--oe-muted); font-weight: 600; }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .oe__routes, .oe__mid { grid-template-columns: 1fr; }
  .oe__pass { display: none; }
  .oe__wing--ai .oe__cards { grid-template-columns: 2fr 1fr; }
}
@media (max-width: 640px) {
  .oe { padding-left: 16px; padding-right: 16px; }
  .oe__wing--saju .oe__cards,
  .oe__wing--ai .oe__cards { grid-template-columns: 1fr; }
  .oe-card { min-height: 0; }
  .oe-card::after { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .oe-card { transition: none; }
  a.oe-card:hover { transform: none; }
}
.oe-card__logo--seal { object-fit: contain; border-radius: 0; }

/* Downloads (product page only) */
.oe__dl { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.oe-dl {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 18px; border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: var(--oe-text); text-decoration: none;
  font: 600 14px 'Poppins', 'Noto Sans KR', sans-serif;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.oe-dl:hover, .oe-dl:focus-visible { border-color: rgba(255, 255, 255, 0.4); background: rgba(255, 255, 255, 0.05); }
.oe-dl:focus-visible { outline: 2px solid var(--oe-saju); outline-offset: 3px; }
.oe-dl__kind { font: 700 10px 'Poppins', sans-serif; letter-spacing: 1px; padding: 3px 6px; border-radius: 4px; background: #bc5632; color: #fff; }