/* =============================================
   MAVI - Market-Adjusted Value Index
   Style Sheet
   ============================================= */

:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #1a2236;
  --bg-card-hover: #1f2a40;
  --text-primary: #e8edf5;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --accent: #06b6d4;
  --accent-dim: #0891b2;
  --accent-glow: rgba(6, 182, 212, 0.15);
  --green: #10b981;
  --red: #ef4444;
  --amber: #f59e0b;
  --border: #1e293b;
  --border-light: #334155;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
}

/* ===== RESET ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ===== NAV ===== */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}

nav.scrolled {
  background: rgba(10, 14, 23, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.5px;
}

.nav-logo .logo-accent {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
  color: #fff;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 24px 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-glow);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.3px;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 20px;
}

.hero h1 .accent-text {
  background: linear-gradient(135deg, var(--accent), #22d3ee);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  color: #fff;
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--accent);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 12px 20px;
}

.btn-ghost:hover {
  color: var(--text-primary);
}

/* ===== SECTIONS ===== */
.section {
  padding: 100px 24px;
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

.section-tag {
  display: inline-block;
  color: var(--accent);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

/* ===== FORMULA DISPLAY ===== */
.formula-display {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  margin: 40px 0;
  text-align: center;
}

.formula-display .formula {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  color: var(--accent);
  word-break: break-all;
  line-height: 1.8;
}

.formula-parts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.formula-part {
  text-align: center;
}

.formula-part .symbol {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  display: block;
  margin-bottom: 8px;
}

.formula-part .label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.formula-part .desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ===== PILLARS ===== */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pillar-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all 0.3s ease;
}

.pillar-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.pillar-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 20px;
}

.pillar-icon.ey { background: rgba(6, 182, 212, 0.15); color: var(--accent); }
.pillar-icon.fr { background: rgba(16, 185, 129, 0.15); color: var(--green); }
.pillar-icon.md { background: rgba(245, 158, 11, 0.15); color: var(--amber); }

.pillar-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.pillar-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ===== HOW IT WORKS ===== */
.how-it-works {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  counter-reset: step;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  transition: all 0.3s ease;
}

.step-card:hover {
  border-color: var(--accent);
}

.step-card::before {
  counter-increment: step;
  content: '0' counter(step);
  position: absolute;
  top: 16px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.05);
  line-height: 1;
}

.step-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--accent);
}

.step-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* ===== STATS GRID ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 4px;
  letter-spacing: -1px;
}

.stat-card .stat-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ===== YEAR TABLE ===== */
.year-table-wrap {
  overflow-x: auto;
  margin: 32px 0;
}

.year-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.year-table th {
  background: var(--bg-card);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

.year-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.year-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.year-table .positive { color: var(--green); }
.year-table .negative { color: var(--red); }
.year-table .muted { color: var(--text-muted); }

/* ===== PUBLICATIONS ===== */
.publication-list {
  display: grid;
  gap: 24px;
}

.pub-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all 0.3s ease;
}

.pub-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.pub-card .pub-meta {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.pub-card .pub-type {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
  background: var(--accent-glow);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pub-card .pub-date {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.pub-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.pub-card .pub-author {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 12px;
}

.pub-card .pub-excerpt {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.pub-card .pub-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.pub-card .pub-links a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
}

.pub-card .pub-links a:hover {
  text-decoration: underline;
}

/* ===== CALCULATOR ===== */
.calculator-section {
  max-width: 700px;
  margin: 0 auto;
}

.calc-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: var(--font-mono);
  transition: border-color 0.2s ease;
  outline: none;
}

.form-group input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.calc-result {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  display: none;
}

.calc-result.visible {
  display: block;
  animation: fadeIn 0.4s ease;
}

.calc-result .result-value {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 4px;
}

.calc-result .result-label {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 20px;
}

.calc-result .result-breakdown {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.calc-result .breakdown-item .bd-value {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.calc-result .breakdown-item .bd-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ===== DISCLAIMER ===== */
.disclaimer {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius);
  padding: 24px;
  margin: 40px 0;
}

.disclaimer h4 {
  color: var(--amber);
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.disclaimer p {
  color: var(--text-secondary);
  font-size: 0.8125rem;
  line-height: 1.7;
}

/* ===== PAGE HEADER ===== */
.page-header {
  padding: 120px 24px 60px;
  text-align: center;
}

.page-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -1.5px;
  margin-bottom: 12px;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== CONTENT PAGES ===== */
.content-page {
  padding: 0 24px 100px;
}

.content-inner {
  max-width: 800px;
  margin: 0 auto;
}

.content-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 48px 0 16px;
  letter-spacing: -0.5px;
  color: var(--accent);
}

.content-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 32px 0 12px;
}

.content-body p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.content-body ul, .content-body ol {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  padding-left: 24px;
  margin-bottom: 16px;
}

.content-body li {
  margin-bottom: 8px;
}

.content-body strong {
  color: var(--text-primary);
}

.content-body .formula-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin: 24px 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  overflow-x: auto;
  text-align: center;
  line-height: 1.8;
}

.content-body .callout {
  background: rgba(6, 182, 212, 0.08);
  border-left: 4px solid var(--accent);
  padding: 16px 20px;
  margin: 24px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.content-body .callout p {
  margin-bottom: 0;
  font-size: 0.9375rem;
}

.content-body .note {
  background: rgba(245, 158, 11, 0.08);
  border-left: 4px solid var(--amber);
  padding: 16px 20px;
  margin: 24px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.content-body .note p {
  margin-bottom: 0;
  font-size: 0.9375rem;
}

/* Edge cases table */
.edge-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.875rem;
}

.edge-table th {
  background: var(--bg-card);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 2px solid var(--border);
}

.edge-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.edge-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* ===== FOOTER ===== */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 24px 32px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 32px;
}

.footer-brand h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.footer-links {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-bottom {
  max-width: 1200px;
  margin: 32px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.8125rem;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: slideUp 0.6s ease forwards;
  opacity: 0;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    width: 100%;
    padding: 12px 16px;
  }

  .formula-parts {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .pillars {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .calc-result .result-breakdown {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-inner {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
}