:root {
  --black: #000000;
  --white: #ffffff;
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-300: #d4d4d4;
  --gray-400: #a3a3a3;
  --gray-500: #737373;
  --gray-600: #525252;
  --gray-700: #404040;
  --gray-800: #262626;
  --gray-900: #171717;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --radius: 8px;
  --radius-lg: 12px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

/* Responsive images */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--white);
  color: var(--black);
  line-height: 1.6;
  margin: 0;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  text-decoration: none;
  color: var(--black);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--black);
  color: var(--white);
  border-radius: 6px;
  font-size: 1rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.main-nav a:not(.btn) {
  color: var(--gray-600);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.15s;
}

.main-nav a:not(.btn):hover {
  color: var(--black);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.9375rem;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.15s ease;
}

.btn-primary {
  background: var(--black);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--gray-800);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--white);
  color: var(--black);
  border: 1px solid var(--gray-300);
}

.btn-secondary:hover {
  background: var(--gray-50);
  border-color: var(--gray-400);
}

.btn-ghost {
  background: transparent;
  color: var(--gray-600);
}

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

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
  display: block;
}

/* Hero */
.hero {
  padding: 5rem 0;
  text-align: center;
  background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

.hero-content {
  max-width: 680px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  margin: 0 0 1.5rem;
  letter-spacing: -0.02em;
}

.hero-title em {
  font-style: normal;
  color: var(--gray-600);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--gray-600);
  margin: 0 0 2rem;
  line-height: 1.5;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.hero-note {
  font-size: 0.875rem;
  color: var(--gray-500);
}

/* Sections */
section {
  padding: 4rem 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin: 0 0 3rem;
}

/* Problem */
.problem-content {
  max-width: 800px;
  margin: 0 auto;
}

.problem-text {
  font-size: 1.25rem;
  text-align: center;
  color: var(--gray-700);
  margin-bottom: 3rem;
}

.problem-text strong {
  color: var(--black);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.problem-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.problem-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.problem-card p {
  color: var(--gray-600);
  margin: 0;
  font-size: 0.9375rem;
}

/* Vision */
.vision {
  background: var(--gray-50);
}

.vision-content {
  max-width: 900px;
  margin: 0 auto;
}

.vision-text {
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 3rem;
}

.vision-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.feature {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.feature-icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.feature h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.feature p {
  color: var(--gray-600);
  margin: 0;
  font-size: 0.9375rem;
}

/* CTA */
.cta {
  background: var(--black);
  color: var(--white);
  text-align: center;
}

.cta-logo {
  max-width: 200px !important;
  margin: 0 auto 2rem !important;
  display: block !important;
  animation: spin 20s linear infinite !important;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.cta h2 {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
}

.cta p {
  color: var(--gray-400);
  margin: 0 0 2rem;
  font-size: 1.125rem;
}

/* About */
.about-hero {
  padding: 4rem 0;
  text-align: center;
  background: var(--gray-50);
}

.about-hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 0 0 1rem;
}

.about-hero .lead {
  font-size: 1.25rem;
  color: var(--gray-600);
  margin: 0;
}

.about-content {
  padding: 4rem 0;
}

.about-block {
  max-width: 700px;
  margin: 0 auto 3rem;
}

.about-block h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 1rem;
}

.about-block p {
  color: var(--gray-700);
  margin: 0 0 1rem;
  font-size: 1.0625rem;
}

/* Billing */
.billing-hero {
  padding: 4rem 0;
  text-align: center;
  background: var(--gray-50);
}

.billing-hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 0 0 1rem;
}

.billing-hero .lead {
  font-size: 1.25rem;
  color: var(--gray-600);
  margin: 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.pricing-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.pricing-card.featured {
  border-color: var(--black);
  box-shadow: var(--shadow-lg);
}

.pricing-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.pricing-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.25rem;
}

.pricing-price .price {
  font-size: 2.5rem;
  font-weight: 800;
}

.pricing-price .period {
  color: var(--gray-500);
  font-size: 0.9375rem;
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0;
  font-size: 0.9375rem;
  color: var(--gray-700);
}

.check-icon {
  width: 20px;
  height: 20px;
  color: var(--gray-400);
  flex-shrink: 0;
}

.pricing-faq {
  max-width: 700px;
  margin: 0 auto;
}

.pricing-faq h2 {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 2rem;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.faq-item h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.faq-item p {
  color: var(--gray-600);
  margin: 0;
  font-size: 0.9375rem;
}

/* Footer */
.site-footer {
  background: var(--gray-50);
  border-top: 1px solid var(--gray-200);
  padding: 3rem 0 1.5rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.footer-brand {
  max-width: 250px;
}

.footer-brand p {
  color: var(--gray-500);
  font-size: 0.875rem;
  margin: 0.5rem 0 0;
}

.footer-links {
  display: flex;
  gap: 3rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-500);
  margin: 0 0 0.25rem;
}

.footer-col a {
  color: var(--gray-700);
  text-decoration: none;
  font-size: 0.9375rem;
}

.footer-col a:hover {
  color: var(--black);
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-200);
}

.footer-bottom p {
  color: var(--gray-500);
  font-size: 0.8125rem;
  margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.25rem;
  }

  .problem-grid,
  .vision-features,
  .pricing-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    gap: 2rem;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 2rem;
  }
}