/* =============================================
   Lesson 22 — Platform Explainer
   Unique component styles + indigo theme
   ============================================= */

/* ---- Indigo accent variables ---- */
:root {
  --indigo:      #6366f1;
  --indigo-lite: #818cf8;
  --indigo-dim:  rgba(99,102,241,0.12);
  --indigo-mid:  rgba(99,102,241,0.22);
}

/* Override shared blue-based styles with indigo for this lesson */
[data-lesson="22"] .hero-grid { background-image:linear-gradient(rgba(99,102,241,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(99,102,241,.04) 1px,transparent 1px); }
[data-lesson="22"] .hero-glow { background:radial-gradient(ellipse 70% 55% at 30% 0%,rgba(99,102,241,.13) 0%,transparent 55%),radial-gradient(ellipse 60% 50% at 75% 0%,rgba(3,136,166,.08) 0%,transparent 55%); }
[data-lesson="22"] .ghost-num { color:rgba(99,102,241,.04); }
[data-lesson="22"] .series-badge { background:var(--indigo-dim); border-color:rgba(99,102,241,.35); color:var(--indigo-lite); }
[data-lesson="22"] .series-badge::before { background:var(--indigo-lite); }
[data-lesson="22"] .hero h1 .accent { color:var(--indigo-lite);display:block; }
[data-lesson="22"] .scroll-line { background:linear-gradient(to bottom,var(--indigo),transparent); }
[data-lesson="22"] .section-label { color:var(--indigo-lite); }
[data-lesson="22"] .highlight-box { background:var(--indigo-dim); border-color:rgba(99,102,241,.25); border-left-color:var(--indigo); }
[data-lesson="22"] .divider { background:linear-gradient(to right,transparent,rgba(99,102,241,.2),transparent); }
[data-lesson="22"] .stat-num { color:var(--indigo-lite); }
[data-lesson="22"] .cta-section::before { background:radial-gradient(ellipse 70% 60% at 50% 50%,rgba(99,102,241,.08) 0%,transparent 70%); }
[data-lesson="22"] .cta-btn { background:linear-gradient(135deg,var(--indigo),var(--blue-light)); }
[data-lesson="22"] .cta-btn:hover { box-shadow:0 16px 40px rgba(99,102,241,.3); }
[data-lesson="22"] .cta-btn.secondary { background:transparent; border-color:rgba(99,102,241,.4); color:var(--indigo-lite); }
[data-lesson="22"] .cta-btn.secondary:hover { background:var(--indigo-dim); border-color:var(--indigo); }
[data-lesson="22"] .series-pill.active { background:var(--indigo-dim); border-color:rgba(99,102,241,.5); color:var(--indigo-lite); }

/* ---- TIER BADGE ---- */
.tier-badge { display:inline-flex; align-items:center; gap:6px; background:rgba(99,102,241,.1); border:1px solid rgba(99,102,241,.3); border-radius:6px; padding:4px 12px; font-family:"DM Mono",monospace; font-size:9px; letter-spacing:.15em; color:var(--indigo-lite); text-transform:uppercase; margin-bottom:16px; }

/* ---- LAYER STACK VISUAL (hero) ---- */
.layer-visual { margin-top:52px; opacity:0; animation:fadeUp .8s ease .8s forwards; width:100%; max-width:560px; }
.layer-stack { display:flex; flex-direction:column; gap:6px; }
.layer-item { border-radius:10px; padding:13px 20px; display:flex; align-items:center; justify-content:space-between; border:1px solid; }
.layer-item.l1 { background:rgba(99,102,241,.12); border-color:rgba(99,102,241,.35); }
.layer-item.l2 { background:rgba(3,136,166,.1); border-color:rgba(3,136,166,.3); }
.layer-item.l3 { background:rgba(94,219,160,.07); border-color:rgba(94,219,160,.25); }
.layer-item.l4 { background:rgba(255,154,60,.07); border-color:rgba(255,154,60,.22); }
.layer-item.l5 { background:rgba(226,196,106,.07); border-color:rgba(226,196,106,.22); }
.li-label { font-family:"DM Mono",monospace; font-size:8px; letter-spacing:.18em; text-transform:uppercase; }
.layer-item.l1 .li-label { color:var(--indigo-lite); }
.layer-item.l2 .li-label { color:var(--blue-light); }
.layer-item.l3 .li-label { color:var(--green); }
.layer-item.l4 .li-label { color:var(--orange); }
.layer-item.l5 .li-label { color:#f0d98a; }
.li-name { font-family:"Lora",serif; font-size:.88rem; font-weight:700; color:var(--white); }
.li-tag { font-family:"DM Mono",monospace; font-size:8px; color:rgba(255,255,255,.35); letter-spacing:.1em; }

/* ---- LAYER DETAIL CARDS ---- */
.layer-grid { display:flex; flex-direction:column; gap:28px; margin-top:52px; }
.layer-card { border-radius:18px; padding:36px; position:relative; overflow:hidden; transition:transform .3s,box-shadow .3s; }
.layer-card:hover { transform:translateY(-4px); box-shadow:0 24px 60px rgba(0,0,0,.4); }
.layer-card::before { content:""; position:absolute; top:0; left:0; width:4px; height:100%; border-radius:0; }
.layer-card.lc-indigo { background:var(--navy-light); border:1px solid rgba(99,102,241,.2); }
.layer-card.lc-indigo::before { background:linear-gradient(to bottom,var(--indigo),var(--indigo-lite)); }
.layer-card.lc-blue { background:var(--navy-light); border:1px solid rgba(3,136,166,.2); }
.layer-card.lc-blue::before { background:linear-gradient(to bottom,var(--blue),var(--blue-light)); }
.layer-card.lc-green { background:var(--navy-light); border:1px solid rgba(94,219,160,.18); }
.layer-card.lc-green::before { background:linear-gradient(to bottom,#16a34a,var(--green)); }
.layer-card.lc-orange { background:var(--navy-light); border:1px solid rgba(255,154,60,.18); }
.layer-card.lc-orange::before { background:linear-gradient(to bottom,var(--orange),rgba(255,154,60,.5)); }
.layer-card.lc-gold { background:var(--navy-light); border:1px solid rgba(226,196,106,.18); }
.layer-card.lc-gold::before { background:linear-gradient(to bottom,#e2c46a,#f0d98a); }
.lc-inner { padding-left:24px; }
.lc-num { font-family:"DM Mono",monospace; font-size:9px; letter-spacing:.22em; text-transform:uppercase; margin-bottom:10px; }
.layer-card.lc-indigo .lc-num { color:var(--indigo-lite); }
.layer-card.lc-blue .lc-num { color:var(--blue-light); }
.layer-card.lc-green .lc-num { color:var(--green); }
.layer-card.lc-orange .lc-num { color:var(--orange); }
.layer-card.lc-gold .lc-num { color:#f0d98a; }
.lc-title { font-family:"Lora",serif; font-size:1.3rem; font-weight:700; margin-bottom:14px; }
.lc-body { font-size:.95rem; color:var(--white-dim); line-height:1.8; max-width:840px; margin-bottom:20px; }
.lc-capabilities { display:flex; flex-wrap:wrap; gap:10px; margin-top:4px; }
.lc-cap { border-radius:8px; padding:6px 14px; font-family:"DM Mono",monospace; font-size:9px; letter-spacing:.12em; text-transform:uppercase; }
.layer-card.lc-indigo .lc-cap { background:var(--indigo-dim); color:var(--indigo-lite); border:1px solid rgba(99,102,241,.25); }
.layer-card.lc-blue .lc-cap { background:var(--blue-dim); color:var(--blue-light); border:1px solid rgba(3,136,166,.25); }
.layer-card.lc-green .lc-cap { background:var(--green-dim); color:var(--green); border:1px solid rgba(94,219,160,.25); }
.layer-card.lc-orange .lc-cap { background:var(--orange-dim); color:var(--orange); border:1px solid rgba(255,154,60,.25); }
.layer-card.lc-gold .lc-cap { background:rgba(226,196,106,.1); color:#f0d98a; border:1px solid rgba(226,196,106,.25); }

/* ---- PRINCIPLE CARDS ---- */
.principle-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:20px; margin-top:52px; }
.principle-card { background:var(--navy-light); border:1px solid rgba(99,102,241,.14); border-radius:16px; padding:30px; position:relative; overflow:hidden; transition:transform .3s; }
.principle-card::before { content:""; position:absolute; top:0; left:0; width:100%; height:3px; background:linear-gradient(90deg,var(--indigo),var(--blue-light)); }
.principle-card:hover { transform:translateY(-4px); }
.principle-card .icon { width:44px; height:44px; border-radius:10px; background:var(--indigo-dim); display:flex; align-items:center; justify-content:center; margin-bottom:16px; }
.principle-card h3 { font-family:"Lora",serif; font-size:1rem; margin-bottom:8px; }
.principle-card p { font-size:.86rem; color:var(--white-dim); margin:0; line-height:1.75; }

/* ---- ASSET CLASS GRID ---- */
.asset-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:16px; margin-top:52px; }
.asset-card { background:var(--navy-light); border:1px solid rgba(99,102,241,.14); border-radius:14px; padding:24px; text-align:center; transition:transform .3s; }
.asset-card:hover { transform:translateY(-4px); }
.asset-card .ac-icon { width:48px; height:48px; border-radius:12px; background:var(--indigo-dim); display:flex; align-items:center; justify-content:center; margin:0 auto 14px; }
.asset-card .ac-name { font-family:"Lora",serif; font-size:.95rem; font-weight:700; margin-bottom:6px; }
.asset-card .ac-desc { font-size:.78rem; color:var(--white-dim); line-height:1.6; }

/* ---- PROCESS FLOW ---- */
.process-flow { display:grid; grid-template-columns:repeat(auto-fit,minmax(160px,1fr)); gap:0; margin-top:52px; position:relative; }
.process-flow::before { content:""; position:absolute; top:32px; left:10%; right:10%; height:2px; background:linear-gradient(90deg,transparent,rgba(99,102,241,.3),var(--indigo-lite),rgba(99,102,241,.3),transparent); z-index:0; }
.pf-step { text-align:center; position:relative; z-index:1; padding:0 8px; }
.pf-circle { width:64px; height:64px; border-radius:50%; background:var(--navy-light); border:2px solid rgba(99,102,241,.4); display:flex; align-items:center; justify-content:center; margin:0 auto 14px; }
.pf-step.active .pf-circle { background:var(--indigo-dim); border-color:var(--indigo-lite); }
.pf-step .pf-num { font-family:"Lora",serif; font-size:1.1rem; font-weight:800; color:rgba(99,102,241,.4); }
.pf-step.active .pf-num { color:var(--indigo-lite); }
.pf-step .pf-name { font-family:"Lora",serif; font-size:.82rem; font-weight:700; margin-bottom:4px; }
.pf-step .pf-sub { font-size:.72rem; color:rgba(255,255,255,.4); line-height:1.5; }

/* ---- EXPERIENCE GRID (issuer/investor panels) ---- */
.experience-grid { display:grid; grid-template-columns:1fr 1fr; gap:24px; margin-top:52px; }
.exp-panel { background:var(--navy-light); border-radius:16px; padding:32px; }
.exp-panel.issuer { border:1px solid rgba(99,102,241,.2); }
.exp-panel.investor { border:1px solid rgba(3,136,166,.2); }
.ep-label { font-family:"DM Mono",monospace; font-size:9px; letter-spacing:.2em; text-transform:uppercase; margin-bottom:12px; }
.exp-panel.issuer .ep-label { color:var(--indigo-lite); }
.exp-panel.investor .ep-label { color:var(--blue-light); }
.exp-panel h3 { font-family:"Lora",serif; font-size:1.05rem; margin-bottom:16px; }
.exp-list { display:flex; flex-direction:column; gap:10px; }
.exp-item { display:flex; gap:10px; font-size:.875rem; color:var(--white-dim); align-items:flex-start; line-height:1.6; }
.exp-item svg { flex-shrink:0; margin-top:2px; }

/* ---- RESPONSIVE ---- */
@media(max-width:768px){
  .experience-grid, .principle-grid { grid-template-columns:1fr; }
  .asset-grid { grid-template-columns:1fr 1fr; }
  .stats-inner { grid-template-columns:1fr 1fr; }
  .process-flow { grid-template-columns:1fr 1fr; }
  .process-flow::before { display:none; }
}