/* ============================================
   ISDA Stakeholder Website — Design System
   isda.dotos.ai
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

/* --- Design Tokens --- */
:root {
  --bg-deep: #0a0e17;
  --bg-surface: #111827;
  --bg-surface-2: #1e293b;
  --bg-glass: rgba(17, 24, 39, 0.65);
  --bg-glass-hover: rgba(30, 41, 59, 0.7);
  --border-glass: rgba(148, 163, 184, 0.1);
  --border-glass-hover: rgba(148, 163, 184, 0.2);

  --accent-primary: #3b82f6;
  --accent-violet: #8b5cf6;
  --accent-gold: #f59e0b;
  --accent-green: #10b981;
  --accent-solar: #f97316;
  --accent-terra: #84cc16;
  --accent-health: #ec4899;
  --accent-compute: #06b6d4;
  --accent-bond: #f59e0b;
  --accent-shelter: #3b82f6;

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #3b82f6;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.1);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);

  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

/* --- Background Pattern --- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(148,163,184,0.05) 1px, transparent 0);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.2; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); margin-bottom: 0.75rem; }
p { color: var(--text-secondary); margin-bottom: 1rem; max-width: 72ch; }
a { color: var(--accent-primary); text-decoration: none; transition: color var(--transition-base); }
a:hover { color: var(--accent-violet); }

.gradient-text {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-text-gold {
  background: linear-gradient(135deg, var(--accent-gold), #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mono { font-family: var(--font-mono); font-size: 0.85em; }
.label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

section {
  padding: 6rem 0;
  position: relative;
}

section + section { border-top: 1px solid var(--border-glass); }

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 0;
  transition: all var(--transition-base);
}

.nav.scrolled {
  background: rgba(10, 14, 23, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  padding: 0.75rem 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-violet));
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  transition: color var(--transition-base);
}

.nav-links a:hover { color: var(--text-primary); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 6rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(59,130,246,0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 50%, rgba(139,92,246,0.06) 0%, transparent 50%);
  animation: hero-glow 8s ease-in-out infinite alternate;
}

@keyframes hero-glow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-2%, 2%) scale(1.05); }
}

.hero-content { position: relative; z-index: 1; max-width: 800px; }
.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-primary);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.hero-eyebrow::before, .hero-eyebrow::after {
  content: '';
  width: 2rem;
  height: 1px;
  background: var(--accent-primary);
  opacity: 0.5;
}

.hero h1 { margin-bottom: 1.5rem; }
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.6;
}

.hero-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
}

.hero-meta span { display: flex; align-items: center; gap: 0.4rem; }
.hero-meta .sep { width: 4px; height: 4px; border-radius: 50%; background: var(--text-muted); }

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
}

.cta-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-violet));
  color: white;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.cta-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
  color: white;
}

.cta-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-glass-hover);
}

.cta-outline:hover {
  border-color: var(--accent-primary);
  background: rgba(59, 130, 246, 0.05);
  color: var(--text-primary);
}

/* --- Glass Cards --- */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-base);
}

.glass-card:hover {
  border-color: var(--border-glass-hover);
  background: var(--bg-glass-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* --- Grid Layouts --- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* --- Section Headers --- */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.section-header p {
  margin-left: auto;
  margin-right: auto;
}

/* --- Barrier Cards (Trust Gap) --- */
.barrier-card {
  position: relative;
  overflow: hidden;
}

.barrier-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-violet));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.barrier-card:hover::before { opacity: 1; }

.barrier-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.barrier-card h3 { font-size: 1.1rem; }

/* --- Maturity Ladder --- */
.ladder {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 2rem;
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-glass);
  margin: 2rem 0;
  flex-wrap: wrap;
}

.ladder-stage {
  text-align: center;
  padding: 1.5rem 2rem;
  border-radius: var(--radius-md);
  min-width: 160px;
}

.ladder-stage.active {
  background: linear-gradient(135deg, rgba(59,130,246,0.1), rgba(139,92,246,0.1));
  border: 1px solid rgba(59,130,246,0.3);
}

.ladder-stage .stage-emoji { font-size: 2rem; margin-bottom: 0.5rem; }
.ladder-stage .stage-label { font-weight: 700; font-size: 1rem; color: var(--text-primary); }
.ladder-stage .stage-sub { font-size: 0.8rem; color: var(--text-muted); }

.ladder-arrow {
  font-size: 1.5rem;
  color: var(--accent-primary);
  font-weight: 700;
}

/* --- Architecture Diagram --- */
.arch-diagram {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 2rem 0;
  overflow-x: auto;
}

.arch-layer {
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 1rem;
  text-align: center;
  transition: all var(--transition-base);
}

.arch-layer:hover { border-color: var(--accent-primary); }

.arch-layer-holdco {
  background: linear-gradient(135deg, rgba(59,130,246,0.08), rgba(139,92,246,0.08));
  border-color: rgba(59,130,246,0.3);
}

.arch-layer-assetco {
  background: rgba(245,158,11,0.05);
  border-color: rgba(245,158,11,0.2);
}

.arch-layer-opco {
  background: rgba(16,185,129,0.05);
  border-color: rgba(16,185,129,0.2);
}

.arch-layer-title {
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.arch-layer-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.assetco-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.75rem;
  margin-top: 1rem;
}

.assetco-chip {
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  font-size: 0.75rem;
  font-weight: 600;
  text-align: center;
  transition: all var(--transition-base);
}

.assetco-chip:hover { transform: translateY(-2px); }

/* --- Vertical Cards --- */
.vertical-card {
  position: relative;
  overflow: hidden;
}

.vertical-card .v-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.vertical-card .v-name {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
}

.vertical-card .v-primitive {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.vertical-card .v-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.v-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  border: 1px solid;
}

/* --- Phase Labels --- */
.phase-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-xl);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border-glass);
  background: var(--bg-surface);
}

/* --- Tables --- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin: 1.5rem 0;
}

.data-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  background: var(--bg-surface);
  border-bottom: 2px solid var(--border-glass-hover);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-glass);
  color: var(--text-secondary);
  vertical-align: top;
}

.data-table tr:hover td { background: rgba(59, 130, 246, 0.03); }

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-primary), var(--accent-violet), var(--accent-gold));
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.35rem;
  top: 0.35rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: 2px solid var(--bg-deep);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2);
}

.timeline-item:last-child .timeline-dot { background: var(--accent-gold); }

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
}

/* --- Map / Globe --- */
.map-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.map-card {
  text-align: center;
  padding: 1.5rem;
}

.map-card .flag { font-size: 2.5rem; margin-bottom: 0.75rem; }
.map-card .country { font-weight: 700; font-size: 1rem; margin-bottom: 0.25rem; color: var(--text-primary); }
.map-card .role { font-size: 0.8rem; color: var(--text-secondary); }

.map-card.blueprint {
  border-color: rgba(59, 130, 246, 0.4);
  background: rgba(59, 130, 246, 0.05);
}

/* --- Stakeholder Cards --- */
.stakeholder-card {
  position: relative;
  overflow: hidden;
}

.stakeholder-card .s-entry {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  margin-bottom: 0.75rem;
}

.stakeholder-card h3 { margin-bottom: 0.75rem; }

.stakeholder-card ul {
  list-style: none;
  padding: 0;
}

.stakeholder-card li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.stakeholder-card li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: 700;
}

/* --- IP Flow --- */
.ip-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
  margin: 2rem 0;
}

.ip-flow-box {
  padding: 2rem;
  border-radius: var(--radius-lg);
  text-align: center;
}

.ip-flow-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-primary);
  font-size: 0.75rem;
  font-weight: 600;
}

/* --- Comparison Table --- */
.compare-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0;
  border-bottom: 1px solid var(--border-glass);
}

.compare-row.header {
  background: var(--bg-surface);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.compare-cell {
  padding: 1rem 1.25rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.compare-cell:first-child {
  font-weight: 600;
  color: var(--text-primary);
}

.compare-cell.isda { color: var(--accent-green); }

/* --- Scroll Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* --- Carbon Table --- */
.carbon-table {
  margin: 2rem 0;
  overflow-x: auto;
}

/* --- Tech Badges --- */
.tech-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.tech-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.875rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
}

.tech-badge .status { color: var(--accent-green); }

/* --- Circular Economy --- */
.circular-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}

.circular-card { text-align: center; }
.circular-card .c-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.circular-card .c-label { font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 0.25rem; }
.circular-card .c-arrow { font-size: 1.5rem; color: var(--accent-green); margin: 0.5rem 0; }

/* --- Footer --- */
.footer {
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--border-glass);
}

.footer-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.footer-canonical {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 2rem;
  padding: 1.5rem;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
}

.footer-version {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .assetco-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  section { padding: 4rem 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .assetco-grid { grid-template-columns: repeat(2, 1fr); }
  .ip-flow { grid-template-columns: 1fr; }
  .ip-flow-arrow { transform: rotate(90deg); }
  .compare-row { grid-template-columns: 1fr; }
  .compare-row.header { display: none; }
  .compare-cell { padding: 0.75rem 1rem; }
  .compare-cell::before { content: attr(data-label); display: block; font-size: 0.7rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.25rem; }
  .circular-grid { grid-template-columns: 1fr; }
  .ladder { flex-direction: column; }
  .ladder-arrow { transform: rotate(90deg); }

  .nav-links { display: none; }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(20px);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-glass);
  }
  .nav-toggle { display: block; }
}

@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .glass-card { padding: 1.25rem; }
  h1 { font-size: 2rem; }
}