/* ── 테마 컬러 오버라이드 (보라 계열) ── */
body::before {
  background:
    radial-gradient(ellipse 65% 50% at 0% 0%, rgba(99,102,241,0.16) 0%, transparent 55%),
    radial-gradient(ellipse 50% 45% at 100% 0%, rgba(139,92,246,0.13) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 50% 110%, rgba(59,130,246,0.1) 0%, transparent 55%);
}
.hero-badge { background: rgba(99,102,241,0.1); border-color: rgba(99,102,241,0.25); color: #4338ca; }
.hero-badge-dot { background: #6366f1; box-shadow: 0 0 8px #6366f1; }
.hero h1 .grad { background: linear-gradient(135deg,#6366f1,#8b5cf6,#0ea5e9); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.divider { background: linear-gradient(90deg,transparent,rgba(99,102,241,0.2),transparent); }
.sec-label { color: #4338ca; }

/* ── 개요 배너 ── */
.overview-banner {
  display: grid; grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 16px; margin-bottom: 44px;
}
.ov-item {
  background: rgba(255,255,255,0.82); border: 1px solid rgba(215,228,255,0.8);
  border-radius: 18px; padding: 18px 20px;
  display: flex; flex-direction: column; gap: 6px;
  box-shadow: 0 2px 12px rgba(99,120,220,0.06);
}
.ov-label { font-size: 0.68rem; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; color: #4338ca; }
.ov-value { font-size: 1rem; font-weight: 800; color: #0f172a; letter-spacing: -0.02em; line-height: 1.3; }
.ov-sub   { font-size: 0.74rem; color: #94a3b8; }

/* ── 수업 흐름 ── */
.flow-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
  margin-bottom: 48px;
}
.flow-card {
  background: rgba(255,255,255,0.85); border: 1px solid rgba(215,228,255,0.85);
  border-radius: 24px; overflow: hidden; display: flex; flex-direction: column;
  box-shadow: 0 2px 16px rgba(99,120,220,0.08);
  transition: transform 240ms ease, box-shadow 240ms ease;
  position: relative; backdrop-filter: blur(12px);
}
.flow-card:hover { transform: translateY(-5px); box-shadow: 0 14px 40px rgba(99,102,241,0.13); }

.flow-visual {
  height: 180px; display: flex; align-items: center; justify-content: center;
  font-size: 3rem; position: relative; overflow: hidden;
}
.flow-visual img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform 400ms ease;
}
.flow-card:hover .flow-visual img { transform: scale(1.04); }
.flow-card.f-intro   .flow-visual { background: linear-gradient(135deg,#ede9fe,#ddd6fe); }
.flow-card.f-main    .flow-visual { background: linear-gradient(135deg,#dbeafe,#bfdbfe); }
.flow-card.f-wrap    .flow-visual { background: linear-gradient(135deg,#e0f2fe,#bae6fd); }
.flow-card.f-post    .flow-visual { background: linear-gradient(135deg,#f0fdf4,#bbf7d0); }

.flow-step {
  position: absolute; top: 10px; left: 12px;
  font-size: 0.64rem; font-weight: 800; letter-spacing: 0.07em;
  background: rgba(255,255,255,0.6); color: #4338ca;
  border-radius: 999px; padding: 2px 9px; border: 1px solid rgba(99,102,241,0.25);
}
.flow-body { padding: 18px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.flow-title { font-size: 1rem; font-weight: 900; color: #0f172a; margin: 0 0 8px; letter-spacing: -0.02em; }
.flow-desc  { font-size: 0.82rem; color: #64748b; line-height: 1.7; margin: 0 0 12px; flex: 1; }
.flow-time  { font-size: 0.71rem; color: #94a3b8; font-weight: 700;
  background: rgba(240,245,255,0.9); border: 1px solid rgba(215,228,255,0.8);
  border-radius: 999px; padding: 3px 10px; display: inline-block; }

.flow-activities { list-style: none; padding: 0; margin: 0 0 14px; display: flex; flex-direction: column; gap: 5px; }
.flow-activities li {
  display: flex; align-items: flex-start; gap: 7px;
  font-size: 0.78rem; color: #475569; line-height: 1.5;
}
.flow-activities li::before {
  content: ""; width: 5px; height: 5px; border-radius: 50%;
  background: #6366f1; flex-shrink: 0; margin-top: 6px;
}

/* ── 키트 소개 배너 ── */
.kit-banner {
  display: flex; align-items: center; gap: 20px;
  background: linear-gradient(135deg, rgba(99,102,241,0.07), rgba(139,92,246,0.05));
  border: 1px solid rgba(99,102,241,0.18); border-radius: 22px; padding: 22px 28px;
  margin-bottom: 40px; position: relative; overflow: hidden;
}
.kit-banner::before {
  content: ""; position: absolute; right: -20px; top: -20px;
  width: 130px; height: 130px; border-radius: 50%;
  background: radial-gradient(circle, rgba(99,102,241,0.12), transparent 70%);
  pointer-events: none;
}
.kit-icon { font-size: 2.6rem; flex-shrink: 0; line-height: 1; }
.kit-body h3 { margin: 0 0 6px; font-size: 1rem; font-weight: 800; color: #0f172a; letter-spacing: -0.02em; }
.kit-body p  { margin: 0; font-size: 0.84rem; color: #64748b; line-height: 1.7; }
.kit-badge {
  margin-left: auto; flex-shrink: 0; padding: 5px 14px; border-radius: 999px;
  font-size: 0.71rem; font-weight: 700;
  background: rgba(99,102,241,0.1); color: #4338ca; border: 1px solid rgba(99,102,241,0.22);
}

/* ── 반응형 ── */
@media (max-width: 640px) {
  .overview-banner { grid-template-columns: 1fr 1fr; }
}