/* ═══════════════════════════════════════════════════════════════════
   NAH Investor Site – Styles
   Light, professional, trust-building design for investors
   ═══════════════════════════════════════════════════════════════════ */

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

:root {
  --bg: #ffffff;
  --bg-card: #f8fafc;
  --bg-card-hover: #f1f5f9;
  --bg-surface: #f0f4f8;
  --bg-warm: #fefcf9;
  --text: #1e293b;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  --accent: #2563eb;
  --accent-light: #3b82f6;
  --accent-soft: #dbeafe;
  --accent-glow: rgba(37, 99, 235, 0.08);
  --gradient: linear-gradient(135deg, #2563eb, #0891b2, #0d9488);
  --gradient-warm: linear-gradient(135deg, #2563eb 0%, #0891b2 50%, #10b981 100%);
  --success: #059669;
  --success-bg: #ecfdf5;
  --warning: #d97706;
  --warning-bg: #fffbeb;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius: 12px;
  --radius-lg: 20px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-w: 1200px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-light); }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #fff;
  padding: 10px 16px; border-radius: 0 0 8px 0;
  font-weight: 600; z-index: 10000;
}
.skip-link:focus { left: 0; color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Navigation ───────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: all var(--transition);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px);
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  background: var(--gradient);
  border-radius: 8px;
  font-weight: 900;
  font-size: 20px;
  color: white;
}
.logo-text {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.5px;
  color: var(--text);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  background: var(--accent) !important;
  color: white !important;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600 !important;
}
.nav-cta:hover { background: var(--accent-light) !important; }
.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-mobile-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* ─── Hero ──────────────────────────────────────────────────────── */
.hero {
  position: relative;
  padding: 180px 0 100px;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(180deg, #f0f7ff 0%, #ffffff 100%);
}
.hero-bg-pattern {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(37,99,235,0.07), transparent),
    radial-gradient(ellipse 60% 40% at 70% 100%, rgba(8,145,178,0.05), transparent);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 1; }
.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--success-bg);
  border: 1px solid rgba(5,150,105,0.2);
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  color: var(--success);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 32px;
}
.hero h1 {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
  color: var(--text);
}
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  max-width: 640px;
  margin: 0 auto 40px;
  font-size: 18px;
  color: var(--text-muted);
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 64px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  max-width: 700px;
  margin: 0 auto;
  padding-top: 48px;
  border-top: 1px solid var(--border);
}
.stat { text-align: center; }
.stat-value {
  display: block;
  font-size: 32px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -1px;
}
.stat-label {
  font-size: 13px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ─── Buttons ──────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 16px rgba(37,99,235,0.25);
}
.btn-primary:hover {
  background: var(--accent-light);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(37,99,235,0.3);
}
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  color: var(--text);
  border-color: #cbd5e1;
  background: var(--bg-card);
}
.btn-lg { padding: 16px 36px; font-size: 17px; }

/* ─── Sections ─────────────────────────────────────────────────── */
.section {
  padding: 100px 0;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.section.visible {
  opacity: 1;
  transform: translateY(0);
}
.section-dark { background: var(--bg-surface); }
.section-label {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 16px;
}
.section h2 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 24px;
  color: var(--text);
}
.section-sub {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 56px;
}

/* ─── Problem ──────────────────────────────────────────────────── */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 56px 0 48px;
}
.problem-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}
.problem-card:hover {
  border-color: #cbd5e1;
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.problem-number {
  font-size: 48px;
  font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
}
.problem-card p { color: var(--text-muted); font-size: 16px; }
.problem-card cite {
  display: block;
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-dim);
  font-style: normal;
}
.problem-insight {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: var(--danger-bg);
  border: 1px solid rgba(220,38,38,0.15);
  border-radius: var(--radius);
  padding: 28px;
}
.insight-icon {
  flex-shrink: 0;
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(220,38,38,0.1);
  color: var(--danger);
  border-radius: 10px;
  font-weight: 800;
  font-size: 18px;
}
.problem-insight p { color: var(--text-muted); font-size: 15px; line-height: 1.7; }
.problem-insight strong { color: var(--text); }

/* ─── Features ─────────────────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition);
  position: relative;
  box-shadow: var(--shadow-sm);
}
.feature-card:hover {
  border-color: #cbd5e1;
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.feature-highlight {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, rgba(37,99,235,0.04), rgba(8,145,178,0.04));
  border-color: rgba(37,99,235,0.2);
  display: flex;
  gap: 24px;
  align-items: flex-start;
}
.feature-icon { font-size: 32px; margin-bottom: 16px; flex-shrink: 0; }
.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}
.feature-card p { color: var(--text-muted); font-size: 15px; }
.feature-tag {
  position: absolute;
  top: 16px; right: 16px;
  padding: 4px 12px;
  background: var(--accent);
  color: white;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

/* ─── Steps ────────────────────────────────────────────────────── */
.steps-visual {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 600px;
  margin: 56px auto 0;
}
.step-item {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}
.step-number {
  flex-shrink: 0;
  width: 48px; height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  border-radius: 14px;
  font-size: 20px;
  font-weight: 800;
  color: white;
}
.step-content h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; color: var(--text); }
.step-content p { color: var(--text-muted); font-size: 15px; }
.step-connector {
  width: 2px;
  height: 32px;
  background: rgba(37,99,235,0.15);
  margin-left: 23px;
}

/* ─── Market ───────────────────────────────────────────────────── */
.market-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 48px 0;
}
.market-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.market-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 8px;
}
.market-value {
  font-size: 36px;
  font-weight: 900;
  color: var(--text);
  letter-spacing: -1px;
  margin-bottom: 12px;
}
.market-card p { color: var(--text-muted); font-size: 14px; }
.market-drivers {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}
.market-drivers h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
}
.driver-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.driver {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--text-muted);
}
.driver-icon { font-size: 20px; }

/* ─── Competitive Moat ─────────────────────────────────────────── */
.moat-table {
  margin-top: 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.moat-header, .moat-row {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1fr 1fr 1fr;
  gap: 1px;
}
.moat-header {
  background: var(--bg-surface);
}
.moat-header .moat-col {
  padding: 16px 20px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-dim);
}
.moat-header .moat-us {
  color: var(--accent);
}
.moat-row {
  border-top: 1px solid var(--border-light);
}
.moat-row .moat-col {
  padding: 14px 20px;
  font-size: 14px;
  color: var(--text-muted);
  background: var(--bg);
}
.moat-row .moat-us {
  color: var(--success);
  font-weight: 600;
  background: var(--success-bg);
}
.moat-row .moat-no { color: var(--text-dim); }
.moat-row .moat-partial { color: var(--warning); }

/* ─── Traction ─────────────────────────────────────────────────── */
.traction-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: 48px 0;
}
.traction-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.traction-icon { font-size: 28px; margin-bottom: 16px; }
.traction-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.5px;
}
.traction-label {
  font-size: 13px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.traction-card p { color: var(--text-muted); font-size: 13px; }

.tech-stack {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.tech-stack h3 { font-size: 14px; color: var(--text-dim); margin-bottom: 20px; text-transform: uppercase; letter-spacing: 1px; }
.tech-pills { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.tech-pills span {
  padding: 6px 16px;
  background: var(--accent-soft);
  border: 1px solid rgba(37,99,235,0.12);
  border-radius: 50px;
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
}

/* ─── Business Model ───────────────────────────────────────────── */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.biz-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}
.biz-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.biz-highlight {
  border-color: rgba(37,99,235,0.3);
  background: linear-gradient(135deg, rgba(37,99,235,0.03), rgba(8,145,178,0.03));
  box-shadow: var(--shadow-md);
}
.biz-tier {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  margin-bottom: 8px;
}
.biz-card h3 { font-size: 20px; margin-bottom: 12px; color: var(--text); }
.biz-card p { color: var(--text-muted); font-size: 14px; margin-bottom: 20px; }
.biz-price {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* ─── Team ─────────────────────────────────────────────────────── */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 700px;
  margin: 0 auto;
}
.team-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.team-avatar {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 800;
  color: white;
  margin: 0 auto 20px;
}
.team-card h3 { font-size: 18px; margin-bottom: 10px; color: var(--text); }
.team-card p { color: var(--text-muted); font-size: 14px; }

/* ─── Ask / Investment ─────────────────────────────────────────── */
.ask-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-top: 48px;
}
.ask-use h3, .ask-milestones h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text);
}
.use-bar {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.use-segment {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border-left: 4px solid var(--color);
  font-size: 14px;
}
.use-segment span { color: var(--text-muted); }
.use-segment strong { color: var(--text); font-size: 16px; }
.milestone-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.milestone-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  font-size: 15px;
  color: var(--text-muted);
}
.ms-q {
  flex-shrink: 0;
  padding: 4px 10px;
  background: var(--accent-soft);
  border: 1px solid rgba(37,99,235,0.15);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
}

/* ─── CTA ──────────────────────────────────────────────────────── */
.section-cta {
  text-align: center;
  background: linear-gradient(135deg, rgba(37,99,235,0.04), rgba(8,145,178,0.04));
  border-top: 1px solid rgba(37,99,235,0.1);
  opacity: 1;
  transform: none;
}
.section-cta h2 { font-size: 36px; margin-bottom: 16px; }
.section-cta p {
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto 32px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 24px;
}
.cta-note {
  font-size: 13px;
  color: var(--text-dim);
}

/* ─── Footer ───────────────────────────────────────────────────── */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-tagline {
  color: var(--text-dim);
  font-size: 13px;
  margin-left: 4px;
}
.footer-legal { text-align: right; }
.footer-legal p { font-size: 13px; color: var(--text-dim); }
.footer-disclaimer { font-size: 11px; margin-top: 4px; }

/* ─── Responsive ───────────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero { padding: 140px 0 60px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .problem-grid,
  .features-grid,
  .market-grid,
  .traction-grid,
  .biz-grid { grid-template-columns: 1fr; }
  .feature-highlight { flex-direction: column; }
  .moat-table { overflow-x: auto; }
  .moat-header, .moat-row { min-width: 600px; }
  .ask-grid { grid-template-columns: 1fr; gap: 32px; }
  .driver-list { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 20px; text-align: center; }
  .footer-legal { text-align: center; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-mobile-toggle { display: flex; }
  .hero-actions { flex-direction: column; align-items: center; }
  .cta-actions { flex-direction: column; align-items: center; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 28px; letter-spacing: -0.5px; }
  .hero-sub { font-size: 16px; }
  .section { padding: 64px 0; }
  .section h2 { font-size: 24px; }
  .problem-number { font-size: 36px; }
  .market-value { font-size: 28px; }
}