:root {
  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --cyan-500: #06b6d4;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --white: #ffffff;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 18px 36px rgba(37, 99, 235, 0.2);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--gray-900);
  line-height: 1.5;
  min-width: 320px;
  background: linear-gradient(to bottom, var(--blue-50), var(--white));
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  display: block;
}

.container {
  width: min(100% - 32px, 1280px);
  margin: 0 auto;
}

.section {
  padding: 80px 0;
}

.section-white {
  background: var(--white);
}

.section-soft {
  background: linear-gradient(to bottom, var(--gray-50), var(--white));
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
}

.header-inner {
  min-height: 72px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.logo {
  width: auto;
  height: 40px;
}

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

.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 500;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease,
    transform 0.2s ease;
  white-space: nowrap;
}

[hidden] {
  display: none !important;
}

.btn:focus-visible {
  outline: 2px solid var(--blue-600);
  outline-offset: 2px;
}

.btn-ghost {
  padding: 10px 16px;
  color: var(--gray-700);
}

.btn-ghost:hover {
  background: var(--gray-100);
}

.btn-primary {
  padding: 10px 16px;
  background: var(--blue-600);
  color: var(--white);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--blue-700);
}

.btn-outline {
  padding: 10px 16px;
  border-color: var(--gray-200);
  color: var(--gray-900);
  background: var(--white);
}

.btn-outline:hover {
  background: var(--gray-50);
}

.btn-lg {
  min-height: 56px;
  padding: 14px 32px;
  font-size: 1.125rem;
}

.btn-block {
  width: 100%;
  margin: 20px 0 24px;
}

.hero {
  padding-top: 80px;
  padding-bottom: 128px;
}

.hero-inner {
  text-align: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 24px;
  border-radius: 999px;
  background: var(--blue-100);
  color: var(--blue-700);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 14px;
}

.icon-box {
  width: 14px;
  height: 14px;
}

.icon-box svg,
.feature-icon svg,
.price-card li svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.hero h1 {
  margin: 0 0 24px;
  letter-spacing: -0.02em;
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  line-height: 1.04;
}

.hero h1 span {
  background: linear-gradient(to right, var(--blue-600), var(--cyan-500));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-text {
  max-width: 680px;
  margin: 0 auto 40px;
  font-size: clamp(1.1rem, 3vw, 1.25rem);
  color: var(--gray-600);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-note {
  margin: 24px 0 0;
  color: var(--gray-500);
  font-size: 0.875rem;
}

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

.section-head h2 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 5vw, 2.25rem);
}

.section-head p {
  margin: 0;
  font-size: clamp(1rem, 3vw, 1.25rem);
  color: var(--gray-600);
}

.grid {
  display: grid;
  gap: 32px;
}

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

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

.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.feature-card {
  transition: box-shadow 0.25s ease;
}

.feature-card:hover {
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 48px;
  height: 48px;
  color: var(--blue-600);
  background: var(--blue-100);
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  margin-bottom: 16px;
}

.feature-card h3,
.price-card h3 {
  margin: 0 0 10px;
  font-size: 1.5rem;
}

.feature-card p {
  margin: 0;
  color: var(--gray-600);
}

.plan-desc {
  margin: 0;
  color: var(--gray-500);
}

.price {
  margin: 16px 0 0;
}

.price strong {
  font-size: 2.25rem;
  line-height: 1;
}

.price span {
  color: var(--gray-600);
}

.price-card {
  position: relative;
}

.price-card-state {
  grid-column: 1 / -1;
  text-align: center;
}

.price-card-state .btn {
  max-width: 320px;
  margin-left: auto;
  margin-right: auto;
}

.price-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.price-card li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--gray-700);
}

.price-card li svg {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  margin-top: 2px;
  color: #22c55e;
}

.popular-badge {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--white);
  background: var(--blue-600);
  border-radius: 999px;
  padding: 6px 12px;
}

.is-popular {
  border-color: var(--blue-500);
  box-shadow: var(--shadow-xl);
}

.cta-section {
  background: linear-gradient(to right, var(--blue-600), var(--cyan-500));
}

.cta-inner {
  text-align: center;
  color: var(--white);
}

.cta-inner h2 {
  font-size: clamp(2rem, 4vw, 2.25rem);
  margin: 0 0 24px;
}

.cta-inner p {
  margin: 0 0 40px;
  color: #bfdbfe;
  font-size: clamp(1.05rem, 3vw, 1.25rem);
}

.btn-light {
  padding: 14px 32px;
  background: var(--white);
  color: var(--blue-600);
}

.btn-light:hover {
  background: var(--gray-100);
}

.btn-outline-light {
  padding: 14px 32px;
  border: 1px solid rgba(255, 255, 255, 0.85);
  color: var(--white);
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.1);
}

.site-footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: 48px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-logo {
  height: 32px;
  margin-bottom: 16px;
}

.footer-grid h3 {
  margin: 0 0 16px;
  color: var(--white);
  font-size: 1rem;
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
  font-size: 0.875rem;
}

.footer-grid a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid #1f2937;
  padding-top: 32px;
  font-size: 0.875rem;
  text-align: center;
}

@media (min-width: 768px) {
  .container {
    width: min(100% - 48px, 1280px);
  }

  .features-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pricing-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .is-popular {
    transform: scale(1.05);
  }

  .features-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .header-actions {
    gap: 8px;
  }

  .btn {
    font-size: 0.9rem;
  }

  .btn-lg {
    width: 100%;
  }
}