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

*{margin:0;padding:0;box-sizing:border-box}
:root{
  --black:#000;--white:#fff;--gray:#888;--light-gray:#f5f5f5;
  --nav-width:280px;--transition:all .3s cubic-bezier(.4,0,.2,1);
}
body{
  font-family:'Space Grotesk',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  background:var(--white);color:var(--black);line-height:1.6;overflow-x:hidden
}
/* NAV */
.nav-sidebar{position:fixed;left:0;top:0;height:100vh;width:var(--nav-width);background:var(--black);
  padding:40px 30px;z-index:1000;overflow-y:auto;transition:var(--transition)}
.nav-logo{color:var(--white);font-size:24px;font-weight:700;letter-spacing:-.5px;margin-bottom:10px}
.nav-subtitle{color:var(--gray);font-size:12px;text-transform:uppercase;letter-spacing:1px;margin-bottom:60px;opacity:.8}
.nav-menu{list-style:none}
.nav-item{margin-bottom:5px;position:relative}
.nav-link{color:var(--white);text-decoration:none;font-size:16px;padding:12px 20px;display:block;border-radius:8px;transition:var(--transition);position:relative;overflow:hidden}
.nav-link::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:0;background:var(--white);transition:height .3s ease}
.nav-link:hover{background:rgba(255,255,255,.1);transform:translateX(5px)}
.nav-link.active{background:rgba(255,255,255,.15)}
.nav-link.active::before{height:70%}
/* MAIN */
.main-content{margin-left:var(--nav-width);min-height:100vh;transition:var(--transition)}
.header{padding:60px 80px 40px;border-bottom:1px solid rgba(0,0,0,.1);background:var(--white)}
.header-meta{font-size:13px;color:var(--gray);text-transform:uppercase;letter-spacing:1px;margin-bottom:20px;opacity:0;animation:fadeInUp .8s forwards}
.page-title{font-size:48px;font-weight:300;letter-spacing:-2px;margin-bottom:10px;opacity:0;animation:fadeInUp .8s .1s forwards}
.page-subtitle{font-size:18px;color:var(--gray);opacity:0;animation:fadeInUp .8s .2s forwards}
.content{padding:60px 80px;max-width:1200px}
.section{margin-bottom:60px;opacity:0;animation:fadeInUp .8s .3s forwards}
.section-header{font-size:24px;font-weight:600;margin-bottom:20px;position:relative;padding-left:20px}
.section-header::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:100%;background:var(--black)}
.section-content{color:#333;line-height:1.8}
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px;margin-top:40px}
.card{background:var(--white);border:1px solid rgba(0,0,0,.1);border-radius:12px;padding:30px;transition:var(--transition);cursor:pointer;position:relative;overflow:hidden}
.card::after{content:'';position:absolute;bottom:0;left:0;width:100%;height:3px;background:var(--black);transform:scaleX(0);transform-origin:left;transition:transform .3s ease}
.card:hover{transform:translateY(-5px);box-shadow:0 10px 30px rgba(0,0,0,.1)}
.card:hover::after{transform:scaleX(1)}
.card-title{font-size:20px;font-weight:600;margin-bottom:15px}
.card-description{color:var(--gray);font-size:15px}
.btn{display:inline-block;padding:12px 30px;background:var(--black);color:var(--white);text-decoration:none;border-radius:25px;font-size:14px;font-weight:500;transition:var(--transition);border:2px solid var(--black);cursor:pointer}
.btn:hover{background:var(--white);color:var(--black)}
.btn-outline{background:transparent;color:var(--black);border:2px solid var(--black)}
.btn-outline:hover{background:var(--black);color:var(--white)}
.menu-toggle{display:none;position:fixed;top:20px;left:20px;z-index:1100;background:var(--black);color:var(--white);border:none;padding:10px;border-radius:8px;cursor:pointer}
.menu-toggle span{display:block;width:25px;height:2px;background:var(--white);margin:5px 0;transition:var(--transition)}
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
/* Responsive */
@media (max-width:1024px){
  .nav-sidebar{transform:translateX(-100%)}
  .nav-sidebar.active{transform:translateX(0)}
  .main-content{margin-left:0}
  .menu-toggle{display:block}
  .header,.content{padding:40px 30px}
  .page-title{font-size:36px}
}
@media (max-width:640px){
  .card-grid{grid-template-columns:1fr}
  .header,.content{padding:30px 20px}
  .page-title{font-size:28px}
}
/* Placeholders */
.placeholder{background:var(--light-gray);border-radius:8px;padding:40px;text-align:center;color:var(--gray);
  border:2px dashed rgba(0,0,0,.1);min-height:200px;display:flex;align-items:center;justify-content:center;flex-direction:column}
.placeholder-icon{font-size:48px;margin-bottom:20px;opacity:.3}
.placeholder-text{font-size:16px}
/* Book grid */
.book-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:40px;margin-bottom:60px}
.book-card .book-hero{height:380px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;padding:30px;text-align:center;cursor:pointer;transition:transform .3s;box-shadow:0 10px 30px rgba(0,0,0,.3);position:relative;overflow:hidden}
.book-card .overlay{background:rgba(0,0,0,.2);position:absolute;inset:0}
.book-details{display:none;margin-top:20px;padding:20px;background:#f9f9f9;border-radius:8px}
.book-hero.fast-fashion{background:linear-gradient(135deg,#8B1538 0%,#FF6B6B 50%,#FF8E53 100%)}
.book-hero.eco-fair{background:linear-gradient(180deg,#00BCD4 0%,#4CAF50 100%)}
.book-hero.quest{background:#000}
.book-hero.breakup{background:linear-gradient(135deg,#00D4FF 0%,#090979 50%,#FF00AA 100%)}
.stat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin-bottom:40px}
.stat-card{padding:20px;background:#f9f9f9;border-radius:8px}
.stat-big{font-size:36px;font-weight:300;margin-bottom:10px}
.stat-sub{color:#666;font-size:14px}
.black-stat{text-align:center;padding:20px;background:#000;color:#fff;border-radius:8px}
.black-stat .num{font-size:42px;font-weight:200;margin-bottom:10px;opacity:.95}
/* Tables */
.table{width:100%;border-collapse:collapse;font-size:14px}
.table th{padding:15px;text-align:left;background:#000;color:#fff}
.table td{padding:15px;color:#333;border-bottom:1px solid #ddd}
.table tr:nth-child(even){background:#f9f9f9}

/* Book cover images */
.book-hero {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
}

.book-hero img.book-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.book-hero .overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.15); }
.book-hero .caption {
  position: absolute; left: 16px; bottom: 16px; right: 16px;
  color: #fff; font-size: 14px; line-height: 1.4; opacity: 0.9;
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  margin-bottom: 60px;
}

.book-card {
  cursor: pointer;
  transition: transform 0.3s;
}

.book-card:hover {
  transform: translateY(-4px);
}

.book-hero {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border-radius: 8px;
  background: #f4f4f4;
}

.book-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.book-details {
  display: none;
  margin-top: 20px;
  padding: 20px;
  background: #f9f9f9;
  border-radius: 8px;
}

/* BARRIERS TO ENTRY STYLES - GREYSCALE/INTERACTIVE */
.barriers-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
  gap:25px;
  margin-bottom:40px;
}

.barrier-card{
  background:#fff;
  border:2px solid #e0e0e0;
  border-radius:12px;
  padding:0;
  cursor:pointer;
  transition:all .3s ease;
  animation:fadeInUp .8s backwards;
  overflow:hidden;
}

.barrier-card:nth-child(1){animation-delay:.1s}
.barrier-card:nth-child(2){animation-delay:.15s}
.barrier-card:nth-child(3){animation-delay:.2s}
.barrier-card:nth-child(4){animation-delay:.25s}
.barrier-card:nth-child(5){animation-delay:.3s}
.barrier-card:nth-child(6){animation-delay:.35s}
.barrier-card:nth-child(7){animation-delay:.4s}

.barrier-card:hover{
  border-color:#666;
  box-shadow:0 5px 20px rgba(0,0,0,.1);
  transform:translateY(-2px);
}

.barrier-card.expanded{
  border-color:#000;
  box-shadow:0 8px 25px rgba(0,0,0,.15);
}

.barrier-header{
  padding:25px;
  display:flex;
  align-items:center;
  gap:15px;
  position:relative;
}

.barrier-icon{
  flex-shrink:0;
  color:#333;
  opacity:.8;
}

.barrier-card.expanded .barrier-icon{
  color:#000;
  opacity:1;
}

.barrier-title{
  flex:1;
  font-size:20px;
  font-weight:600;
  color:#333;
  margin:0;
}

.barrier-card.expanded .barrier-title{
  color:#000;
}

.barrier-toggle{
  width:32px;
  height:32px;
  border-radius:50%;
  background:#f5f5f5;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:24px;
  font-weight:300;
  color:#666;
  transition:all .3s ease;
  flex-shrink:0;
}

.barrier-card:hover .barrier-toggle{
  background:#e0e0e0;
  color:#333;
}

.barrier-card.expanded .barrier-toggle{
  background:#000;
  color:#fff;
  transform:rotate(180deg);
}

.barrier-content{
  max-height:0;
  overflow:hidden;
  transition:max-height .4s ease,padding .4s ease;
  padding:0 25px;
}

.barrier-content.active{
  max-height:500px;
  padding:0 25px 25px 25px;
}

.barrier-description{
  font-size:15px;
  line-height:1.7;
  color:#555;
  margin-bottom:20px;
}

.barrier-impact{
  background:#f9f9f9;
  padding:15px;
  border-radius:8px;
  border-left:3px solid #333;
  font-size:14px;
  line-height:1.6;
  color:#666;
}

.barrier-impact strong{
  display:block;
  margin-bottom:5px;
  color:#333;
  font-weight:600;
}

/* FORKING PATHS STYLES */
.forking-diagram-container{
  background:#f9f9f9;
  border-radius:12px;
  padding:40px;
  margin:40px 0;
  display:flex;
  justify-content:center;
  align-items:center;
  min-height:400px;
}

.forking-diagram-image{
  max-width:100%;
  height:auto;
  border-radius:8px;
  box-shadow:0 10px 30px rgba(0,0,0,.1);
}

/* ONTOLOGY DIAGRAM STYLES */
.ontology-container{
  background:#fff;
  padding:40px 20px;
  border-radius:12px;
  margin:40px 0;
  border:1px solid rgba(0,0,0,.1);
}

.ontology-row{
  display:flex;
  align-items:center;
  gap:30px;
  margin-bottom:0;
}

.ontology-label{
  min-width:140px;
  font-size:12px;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:1px;
  color:#666;
  text-align:right;
  padding-right:20px;
  border-right:2px solid #ddd;
}

.ontology-nodes{
  flex:1;
  display:flex;
  justify-content:center;
  gap:20px;
  flex-wrap:wrap;
}

.ontology-three-col{justify-content:space-around}
.ontology-four-col{justify-content:space-around}
.ontology-five-col{justify-content:space-around}

.ontology-node{
  background:#f5f5f5;
  border-radius:8px;
  padding:20px 25px;
  min-width:140px;
  text-align:center;
  transition:all .3s ease;
  position:relative;
  border:2px solid transparent;
}

.node-primary{
  background:#6B9BD1;
  color:#fff;
  font-weight:500;
  border-color:#5B8BC1;
}

.node-secondary{
  background:#879850;
  color:#fff;
  font-weight:500;
  border-color:#6B7A3D;
}

.node-focus{
  box-shadow:0 4px 15px rgba(107,155,209,.3);
  transform:scale(1.05);
}

.ontology-node:hover{
  transform:translateY(-3px) scale(1.05);
  box-shadow:0 8px 20px rgba(0,0,0,.15);
}

.node-content{
  font-size:13px;
  font-weight:600;
  letter-spacing:.5px;
  line-height:1.4;
}

.ontology-connector{
  display:flex;
  justify-content:center;
  margin:0 0 0 170px;
}

/* COMMUNITY PRACTICE / COMPETITOR STYLES */
.competitor-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(340px,1fr));
  gap:30px;
  margin-bottom:50px;
}

.competitor-card{
  background:#fff;
  border:1px solid #e0e0e0;
  border-radius:12px;
  overflow:hidden;
  transition:all .3s ease;
  animation:fadeInUp .8s backwards;
}

.competitor-card:nth-child(1){animation-delay:.1s}
.competitor-card:nth-child(2){animation-delay:.15s}
.competitor-card:nth-child(3){animation-delay:.2s}
.competitor-card:nth-child(4){animation-delay:.25s}
.competitor-card:nth-child(5){animation-delay:.3s}

.competitor-card:hover{
  border-color:#999;
  box-shadow:0 8px 25px rgba(0,0,0,.12);
  transform:translateY(-4px);
}

.competitor-image-container{
  position:relative;
  width:100%;
  height:220px;
  background:#f5f5f5;
  overflow:hidden;
}

.competitor-image{
  width:100%;
  height:100%;
  object-fit:contain;
  object-position:center;
  display:block;
}

.competitor-badge{
  position:absolute;
  top:12px;
  right:12px;
  background:#000;
  color:#fff;
  padding:6px 12px;
  border-radius:20px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.3px;
}

.competitor-content{
  padding:25px;
}

.competitor-title{
  font-size:20px;
  font-weight:600;
  margin-bottom:12px;
}

.competitor-title a{
  color:#000;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  transition:color .2s ease;
}

.competitor-title a:hover{
  color:#666;
}

.competitor-title svg{
  opacity:.6;
  transition:opacity .2s ease,transform .2s ease;
}

.competitor-title a:hover svg{
  opacity:1;
  transform:translate(2px,-2px);
}

.competitor-description{
  color:#555;
  font-size:15px;
  line-height:1.6;
  margin-bottom:15px;
}

.competitor-gap{
  background:#f9f9f9;
  padding:12px 15px;
  border-radius:8px;
  border-left:3px solid #333;
  font-size:14px;
  line-height:1.5;
  color:#666;
}

.competitor-gap strong{
  color:#333;
  display:block;
  margin-bottom:3px;
}

/* Insight Cards */
.insight-card{
  background:#f9f9f9;
  padding:25px;
  border-radius:8px;
  border-left:3px solid #000;
  transition:all .3s ease;
}

.insight-card:hover{
  background:#f5f5f5;
  transform:translateX(5px);
}

@media (max-width:768px){
  .competitor-grid{
    grid-template-columns:1fr;
  }
}

  
  .ontology-row{
    flex-direction:column;
    align-items:flex-start;
    gap:20px;
  }
  
  .ontology-label{
    border-right:none;
    border-bottom:2px solid #ddd;
    padding-bottom:10px;
    text-align:left;
    width:100%;
  }
  
  .ontology-nodes{
    width:100%;
  }
  
  .ontology-connector{
    margin:0;
    height:40px;
  }
  
  .ontology-connector svg{
    height:40px;
  }
  
  .forking-diagram-container{
    padding:20px;
  }

  /* ============================================
   NESTED NAVIGATION STYLES
   ============================================ */

/* Section container */
.nav-section {
  margin-bottom: 8px;
}

/* Section header (clickable area) */
.nav-section-header {
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 12px 20px;
  cursor: pointer;
  border-radius: 8px;
  transition: var(--transition);
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.nav-section-header:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Arrow indicator */
.nav-arrow {
  font-size: 10px;
  transition: transform 0.3s ease;
  opacity: 0.7;
}

/* Rotate arrow when expanded */
.nav-section.expanded .nav-arrow {
  transform: rotate(-180deg);
}

/* Submenu container */
.nav-submenu {
  list-style: none;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.3s ease;
  opacity: 0;
  margin-left: 15px;
  padding-left: 15px;
  border-left: 2px solid rgba(255, 255, 255, 0.2);
}

/* Submenu when expanded */
.nav-submenu.expanded {
  max-height: 1000px;
  opacity: 1;
  margin-top: 5px;
  margin-bottom: 10px;
}

/* Individual submenu items */
.nav-subitem {
  margin-bottom: 3px;
}

/* Submenu links */
.nav-subitem .nav-link {
  font-size: 14px;
  padding: 8px 15px;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 400;
}

.nav-subitem .nav-link:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

/* Active submenu link */
.nav-subitem .nav-link.active {
  background: rgba(255, 255, 255, 0.15);
  color: var(--white);
  font-weight: 500;
}

/* Override the ::before indicator for sublinks */
.nav-subitem .nav-link::before {
  width: 2px;
  height: 0;
}

.nav-subitem .nav-link.active::before {
  height: 60%;
}

/* Mobile adjustments */
@media (max-width: 1024px) {
  .nav-section-header {
    padding: 10px 15px;
    font-size: 13px;
  }
  
  .nav-subitem .nav-link {
    font-size: 13px;
    padding: 7px 12px;
  }
}