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

:root {
  --color-primary: #0F1B2D;
  --color-primary-light: #1A2B45;
  --color-accent: #4A9B8E;
  --color-accent-hover: #3D8578;
  --color-bg: #FFFFFF;
  --color-bg-muted: #F8FAFC;
  --color-bg-dark: #0F1B2D;
  --color-text: #0F1B2D;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94A3B8;
  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1120px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(15, 27, 45, 0.05);
  --shadow-md: 0 4px 16px rgba(15, 27, 45, 0.08);
  --shadow-lg: 0 8px 32px rgba(15, 27, 45, 0.12);
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ---- Header ---- */

.header {
  padding: 16px 0;
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 100;
  border-bottom: 1px solid var(--color-border-light);
}

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

.logo {
  color: var(--color-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo svg {
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color var(--transition);
}

.nav a:hover {
  color: var(--color-text);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: all var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
}

.btn:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(74, 155, 142, 0.3);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
  border-radius: var(--radius);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 13px;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-border);
  color: var(--color-text);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: transparent;
  box-shadow: none;
}

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

.btn-white:hover {
  background: var(--color-bg-muted);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.2);
}

/* ---- Hero ---- */

.hero {
  position: relative;
  padding: 120px 0 100px;
  text-align: center;
  overflow: hidden;
}

.hero-gradient {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(74, 155, 142, 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(74, 155, 142, 0.08);
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: 32px;
  letter-spacing: 0.01em;
}

.hero h1 {
  font-size: 60px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 24px;
  color: var(--color-primary);
}

.hero-sub {
  font-size: 19px;
  color: var(--color-text-secondary);
  max-width: 620px;
  margin: 0 auto 44px;
  line-height: 1.7;
}

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

/* ---- Sections ---- */

.section {
  padding: 100px 0;
}

.section-muted {
  background: var(--color-bg-muted);
}

.section-dark {
  background: var(--color-bg-dark);
  color: #fff;
}

.section-dark .section-label {
  color: var(--color-accent);
}

.section-dark h2 {
  color: #fff;
}

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

.section-label {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.15;
  color: var(--color-primary);
}

.section-sub {
  font-size: 18px;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---- Steps ---- */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 960px;
  margin: 0 auto;
}

.step {
  position: relative;
  text-align: center;
  padding: 40px 28px;
}

.step-icon {
  margin-bottom: 28px;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--color-accent);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
}

.step-content h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.step-content p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.step-connector {
  display: none;
}

/* ---- Pricing ---- */

.pricing-section {
  text-align: center;
}

.pricing-card {
  max-width: 480px;
  margin: 0 auto;
  padding: 56px 48px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
}

.price-label {
  font-size: 14px;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 600;
  margin-bottom: 8px;
}

.price-amount {
  font-size: 72px;
  font-weight: 800;
  letter-spacing: -3px;
  line-height: 1;
  margin-bottom: 8px;
  color: #fff;
}

.price-currency {
  font-size: 40px;
  font-weight: 700;
  vertical-align: super;
  margin-right: 2px;
  letter-spacing: 0;
}

.price-period {
  font-size: 20px;
  font-weight: 500;
  color: var(--color-text-tertiary);
  letter-spacing: 0;
}

.price-note {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
  margin-bottom: 32px;
}

.pricing-card .btn-outline {
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}

.pricing-card .btn-outline:hover {
  border-color: #fff;
  color: #fff;
}

/* ---- Features ---- */

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature {
  padding: 40px 32px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.feature:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(74, 155, 142, 0.08);
  color: var(--color-accent);
  margin-bottom: 24px;
}

.feature h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.feature p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ---- FAQ ---- */

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

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq-item summary {
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  color: var(--color-text);
  transition: color var(--transition);
}

.faq-item summary:hover {
  color: var(--color-accent);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-chevron {
  flex-shrink: 0;
  transition: transform var(--transition);
  color: var(--color-text-tertiary);
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-item p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding: 0 32px 24px 0;
}

/* ---- CTA Section ---- */

.section-cta {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
  text-align: center;
  padding: 100px 0;
}

.section-cta h2 {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 20px;
  color: #fff;
}

.section-cta .section-sub {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 40px;
}

/* ---- Footer ---- */

.footer {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  color: var(--color-text-tertiary);
}

.footer-legal {
  font-size: 13px;
  color: var(--color-text-tertiary);
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
  .hero {
    padding: 80px 0 60px;
  }

  .hero h1 {
    font-size: 36px;
    letter-spacing: -1px;
  }

  .hero-sub {
    font-size: 16px;
  }

  .section {
    padding: 64px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .section-header h2 {
    font-size: 30px;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .step {
    padding: 24px 16px;
  }

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

  .feature {
    padding: 28px 24px;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }

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

  .mobile-menu-toggle {
    display: flex;
  }

  .pricing-card {
    padding: 40px 28px;
  }

  .price-amount {
    font-size: 56px;
  }

  .section-cta h2 {
    font-size: 30px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 30px;
  }

  .btn-lg {
    padding: 14px 28px;
    font-size: 15px;
    width: 100%;
  }
}