/* ============================================================
   OpenFinClaw Compute — Global Stylesheet
   Dark theme / fintech aesthetic / mobile-first
   ============================================================ */

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

:root {
  --bg-primary: #0a0a0f;
  --bg-card: #1a1a2e;
  --bg-card-hover: #22223a;
  --bg-nav: rgba(10, 10, 15, 0.92);
  --accent: #00d4aa;
  --accent-end: #00b894;
  --accent-glow: rgba(0, 212, 170, 0.15);
  --text-primary: #e8e8ee;
  --text-secondary: #9999aa;
  --text-muted: #666677;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-card: rgba(255, 255, 255, 0.08);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  --max-width: 1200px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

a:hover {
  opacity: 0.85;
}

img {
  max-width: 100%;
  display: block;
}

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

.section {
  padding: 100px 0;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 48px;
}

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

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* --- Buttons ---------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-1px);
  opacity: 1;
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-end));
  color: #0a0a0f;
  box-shadow: 0 4px 20px rgba(0, 212, 170, 0.25);
}

.btn-primary:hover {
  box-shadow: 0 6px 28px rgba(0, 212, 170, 0.35);
  color: #0a0a0f;
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-card);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-sm {
  padding: 10px 24px;
  font-size: 0.875rem;
}

/* --- Navigation ------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: background var(--transition-normal), padding var(--transition-normal), box-shadow var(--transition-normal);
}

.nav.scrolled {
  background: var(--bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 10px 0;
  box-shadow: 0 1px 0 var(--border-subtle);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-end));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--bg-primary);
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text-primary);
  opacity: 1;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-toggle {
  background: none;
  border: 1px solid var(--border-card);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.lang-toggle:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
}

/* --- Hero ------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid var(--border-card);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  background: rgba(26, 26, 46, 0.5);
}

.hero-badge .badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.5;
}

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

.hero-metrics {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--border-subtle);
}

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

.hero-metric .metric-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.hero-metric .metric-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* --- Features --------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  position: relative;
  padding: 36px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  transition: border-color var(--transition-normal), transform var(--transition-normal);
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.feature-card:hover {
  border-color: rgba(0, 212, 170, 0.2);
  transform: translateY(-2px);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.2rem;
  color: var(--accent);
  border: 1px solid rgba(0, 212, 170, 0.12);
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- How It Works ----------------------------------------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: calc(16.67% + 24px);
  right: calc(16.67% + 24px);
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-end));
  opacity: 0.3;
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-mono);
  position: relative;
  z-index: 1;
}

.step h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Pricing ---------------------------------------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: start;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.pricing-card {
  position: relative;
  padding: 36px 28px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  transition: border-color var(--transition-normal), transform var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-4px);
}

.pricing-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 40px rgba(0, 212, 170, 0.1);
}

.pricing-card.featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-end));
}

.pricing-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  padding: 4px 14px;
  border-radius: 100px;
  background: linear-gradient(135deg, var(--accent), var(--accent-end));
  color: var(--bg-primary);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.pricing-card .pricing-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.pricing-amount {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 4px;
}

.pricing-amount .currency {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.pricing-amount .price {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
}

.pricing-amount .period {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-left: 2px;
}

.pricing-trial {
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 24px;
}

.pricing-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 20px 0;
}

.pricing-features {
  list-style: none;
  margin-bottom: 28px;
}

.pricing-features li {
  position: relative;
  padding-left: 24px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.4;
}

.pricing-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 1.5px solid var(--accent);
}

.pricing-features li::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 10px;
  width: 6px;
  height: 3px;
  border-left: 1.5px solid var(--accent);
  border-bottom: 1.5px solid var(--accent);
  transform: rotate(-45deg);
}

.pricing-card .btn {
  width: 100%;
}

/* --- FAQ -------------------------------------------------- */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 24px 0;
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: color var(--transition-fast);
}

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

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  position: relative;
  margin-left: 16px;
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--transition-normal);
}

.faq-icon::before {
  top: 50%;
  left: 4px;
  right: 4px;
  height: 2px;
  transform: translateY(-50%);
}

.faq-icon::after {
  left: 50%;
  top: 4px;
  bottom: 4px;
  width: 2px;
  transform: translateX(-50%);
}

.faq-item.active .faq-icon::after {
  transform: translateX(-50%) scaleY(0);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-answer-inner {
  padding-bottom: 24px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

/* --- Footer ----------------------------------------------- */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 12px;
  max-width: 280px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--text-primary);
  opacity: 1;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-tagline {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* --- Pricing Page Header ---------------------------------- */
.page-header {
  padding: 140px 0 60px;
  text-align: center;
}

.page-header h1 {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto;
}

/* --- Pricing Comparison Table ----------------------------- */
.comparison-section {
  padding: 60px 0 100px;
}

.comparison-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

.comparison-table th,
.comparison-table td {
  padding: 14px 20px;
  text-align: left;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-table thead th {
  background: var(--bg-card);
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.comparison-table tbody td {
  color: var(--text-secondary);
}

.comparison-table tbody td:first-child {
  color: var(--text-primary);
  font-weight: 500;
}

.comparison-table tbody tr:last-child td {
  border-bottom: none;
}

.comparison-table .check {
  color: var(--accent);
  font-weight: 600;
}

.comparison-table .dash {
  color: var(--text-muted);
}

/* --- Guarantee Section ------------------------------------ */
.guarantee {
  text-align: center;
  padding: 80px 0;
}

.guarantee-box {
  display: inline-block;
  padding: 40px 60px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-card);
}

.guarantee-box h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.guarantee-box p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 400px;
}

/* --- Responsive ------------------------------------------- */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .hero-tagline {
    font-size: 1.05rem;
  }

  .hero-metrics {
    gap: 24px;
  }

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

  .steps {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .steps::before {
    display: none;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .nav-links {
    display: none;
  }

  .nav-actions {
    display: none;
  }

  .nav-mobile-toggle {
    display: block;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-nav);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border-subtle);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .page-header {
    padding: 120px 0 40px;
  }

  .page-header h1 {
    font-size: 2rem;
  }

  .comparison-table-wrapper {
    margin: 0 -24px;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.85rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-actions .btn {
    width: 100%;
    max-width: 280px;
  }

  .hero-metrics {
    flex-direction: column;
    gap: 16px;
  }
}