* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --navy: #1B2A4A;
  --navy-dark: #0D1B2E;
  --teal: #1FA8B0;
  --teal-dim: rgba(31, 168, 176, 0.12);
  --teal-glow: rgba(31, 168, 176, 0.3);
  --silver: #8A9BB0;
  --white: #FFFFFF;
  --bg-primary: #0D1B2E;
  --bg-secondary: #111827;
  --bg-card: #1B2A4A;
  --text-primary: #FFFFFF;
  --text-secondary: #8A9BB0;
  --text-muted: #5a6478;
  --border: rgba(255,255,255,0.08);
  --red: #ff4d6a;
  --red-dim: rgba(255, 77, 106, 0.12);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Nav */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  padding: 1.25rem 2rem;
  background: rgba(13, 27, 46, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo img {
  height: 40px;
  width: auto;
}
.logo-text {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 0.5px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.3px;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--white); }
.nav-cta {
  background: var(--teal);
  color: var(--white) !important;
  padding: 0.55rem 1.4rem;
  border-radius: 8px;
  font-weight: 600 !important;
  transition: all 0.2s;
}
.nav-cta:hover {
  background: #25bfc7;
  transform: translateY(-1px);
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 7rem 2rem 5rem;
  position: relative;
  background: var(--navy);
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(ellipse 70% 40% at 50% -10%, rgba(31,168,176,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 50% 30% at 80% 60%, rgba(138,155,176,0.08) 0%, transparent 50%);
  pointer-events: none;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--teal-dim);
  border: 1px solid rgba(31,168,176,0.25);
  color: var(--teal);
  padding: 0.4rem 1rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 2.5rem;
}
.hero-tag::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--teal);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--teal);
}
.hero h1 {
  font-family: 'Inter', sans-serif;
  font-size: clamp(2rem, 5.5vw, 4rem);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 1.75rem;
  max-width: 900px;
}
.hero h1 .stat-highlight {
  color: var(--teal);
  display: block;
}
.hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 3rem;
  line-height: 1.75;
  font-weight: 400;
}
.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-primary {
  background: var(--teal);
  color: var(--white);
  padding: 0.9rem 2.2rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.25s;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: 0.3px;
}
.btn-primary:hover {
  background: #25bfc7;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(31,168,176,0.35);
}
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  padding: 0.9rem 2.2rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: 1px solid var(--border);
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.15);
}

/* Revenue Leakage — Centerpiece */
.leakage-centerpiece {
  padding: 5rem 2rem;
  background: var(--bg-primary);
  text-align: center;
}
.centerpiece-stat {
  font-family: 'Inter', sans-serif;
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -3px;
  line-height: 1;
  margin-bottom: 0.5rem;
}
.centerpiece-stat .sym {
  font-size: 0.5em;
  font-weight: 700;
  color: var(--teal);
  vertical-align: super;
}
.centerpiece-label {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}
.teal-divider {
  width: 60px;
  height: 4px;
  background: var(--teal);
  border-radius: 2px;
  margin: 0 auto 3rem;
}

/* Assessment Section */
.assessment {
  padding: 5rem 2rem;
  background: var(--navy);
}
.assessment-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.assessment-label {
  text-align: center;
  font-size: 0.75rem;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 600;
  margin-bottom: 0.75rem;
}
.assessment-title {
  text-align: center;
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 0.75rem;
}
.assessment-sub {
  text-align: center;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 3rem;
  font-size: 1rem;
}
.assessment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
}
.assessment-card {
  background: rgba(13,27,46,0.6);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.75rem;
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  transition: all 0.3s;
}
.assessment-card:hover {
  border-color: rgba(31,168,176,0.25);
  transform: translateY(-3px);
}
.assessment-icon {
  width: 44px;
  height: 44px;
  background: var(--teal-dim);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.25rem;
}
.assessment-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--white);
}
.assessment-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Who I Am */
.who {
  padding: 5rem 2rem;
  background: var(--bg-primary);
}
.who-inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.who-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 2rem;
}
.who-bio {
  text-align: left;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2.5rem;
  margin-bottom: 2rem;
}
.who-bio p {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 1.05rem;
}
.who-bio p + p { margin-top: 1rem; }
.who-credentials {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.credential {
  background: var(--teal-dim);
  border: 1px solid rgba(31,168,176,0.2);
  color: var(--teal);
  padding: 0.4rem 1rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* Revenue Model */
.model {
  padding: 5rem 2rem;
  background: var(--navy);
}
.model-inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.model-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 2rem;
}
.model-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}
.model-step {
  background: rgba(13,27,46,0.6);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem 2rem;
  text-align: center;
  min-width: 180px;
  flex: 1;
}
.model-step-num {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 0.5rem;
}
.model-step h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}
.model-step p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.model-arrow {
  color: var(--teal);
  font-size: 1.5rem;
}
.model-pricing {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

/* CTA Banner */
.cta-banner {
  padding: 5rem 2rem;
  background: var(--bg-primary);
  text-align: center;
}
.cta-banner h2 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 1rem;
}
.cta-banner p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  background: var(--bg-primary);
}
footer a { color: var(--text-muted); text-decoration: none; }
footer a:hover { color: var(--text-secondary); }

/* Auth modal */
.auth-overlay {
  position: fixed;
  inset: 0;
  background: rgba(13,27,46,0.9);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.auth-modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2.5rem;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 40px 80px rgba(0,0,0,0.5);
  position: relative;
}
.auth-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
  padding: 0.25rem;
  transition: color 0.2s;
}
.auth-close:hover { color: var(--text-primary); }
.auth-modal h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}
.auth-modal p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.75rem;
}
.form-group { margin-bottom: 1rem; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  font-weight: 500;
}
.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s;
  outline: none;
  box-sizing: border-box;
}
.form-group input:focus { border-color: var(--teal); }
.form-group input::placeholder { color: var(--text-muted); }
.form-error {
  background: var(--red-dim);
  color: var(--red);
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-size: 0.85rem;
  margin-bottom: 1rem;
  display: none;
}
.form-error.show { display: block; }
.form-submit {
  width: 100%;
  padding: 0.85rem;
  background: var(--teal);
  color: var(--white);
  border: none;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  margin-top: 0.5rem;
}
.form-submit:hover { background: #25bfc7; transform: translateY(-1px); }
.auth-switch {
  text-align: center;
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.auth-switch a { color: var(--teal); cursor: pointer; text-decoration: none; }
.auth-switch a:hover { text-decoration: underline; }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 2rem; letter-spacing: -0.5px; }
  .hero { padding: 6rem 1.5rem 4rem; }
  .leakage-centerpiece, .assessment, .who, .model, .cta-banner { padding: 3.5rem 1.5rem; }
  .assessment-grid { grid-template-columns: 1fr; }
  .model-flow { flex-direction: column; gap: 1rem; }
  .model-arrow { transform: rotate(90deg); }
  .centerpiece-stat { letter-spacing: -1px; }
}