/* ==================== RESET & BASE ==================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy: #0f172a;
  --navy-light: #1e293b;
  --orange: #f97316;
  --orange-hover: #ea580c;
  --orange-light: #fff7ed;
  --orange-bg: #fef3e2;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --white: #ffffff;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
  color: var(--gray-700);
  line-height: 1.6;
  background: var(--white);
  overflow-x: hidden;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  color: var(--navy);
  line-height: 1.2;
  font-weight: 700;
}

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

/* ==================== BUTTONS ==================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--orange);
  color: var(--white);
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  transition: all 0.2s;
  border: 2px solid var(--orange);
}
.btn-primary:hover { background: var(--orange-hover); border-color: var(--orange-hover); transform: translateY(-1px); }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--navy);
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  transition: all 0.2s;
  border: 2px solid var(--gray-200);
}
.btn-outline:hover { border-color: var(--orange); color: var(--orange); }

.btn-ghost {
  color: var(--gray-600);
  font-weight: 600;
  font-size: 14px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: color 0.2s;
}
.btn-ghost:hover { color: var(--orange); }

.btn-sm { padding: 8px 20px; font-size: 14px; }
.btn-lg { padding: 16px 36px; font-size: 16px; }
.btn-block { display: block; width: 100%; text-align: center; }

/* ==================== NAVBAR ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all 0.3s;
}
.navbar.scrolled {
  background: rgba(255,255,255,0.95);
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 800;
  color: var(--navy);
}
.logo-icon { font-size: 24px; }

.nav-links {
  display: flex;
  gap: 32px;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-600);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--orange); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  transition: all 0.3s;
  border-radius: 2px;
}
.mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-menu {
  display: none;
  padding: 16px 24px 24px;
  background: var(--white);
  border-top: 1px solid var(--gray-100);
}
.mobile-menu a {
  display: block;
  padding: 12px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-700);
}
.mobile-menu hr {
  border: none;
  border-top: 1px solid var(--gray-100);
  margin: 8px 0;
}
.mobile-menu.open { display: block; }

/* ==================== HERO ==================== */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}
.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  background: var(--orange-bg);
  color: var(--orange);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 48px;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.text-orange { color: var(--orange); }

.hero-desc {
  font-size: 18px;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 500px;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.hero-note {
  font-size: 13px;
  color: var(--gray-400);
}

/* Hero Card */
.hero-visual {
  display: flex;
  justify-content: center;
}
.hero-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 420px;
  overflow: hidden;
}
.hero-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 20px;
  background: var(--navy);
}
.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot.red { background: #ef4444; }
.dot.yellow { background: #eab308; }
.dot.green { background: #22c55e; }
.hero-card-title {
  color: var(--gray-400);
  font-size: 13px;
  margin-left: 8px;
}
.hero-card-body { padding: 20px; }
.hero-card-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--gray-100);
}
.hero-card-row:last-child { border-bottom: none; }
.hero-card-label {
  font-size: 13px;
  color: var(--gray-400);
  font-weight: 500;
}
.hero-card-value {
  font-size: 14px;
  color: var(--navy);
  font-weight: 600;
}
.hero-card-value.highlight {
  color: var(--orange);
  background: var(--orange-light);
  padding: 4px 10px;
  border-radius: 6px;
}

/* ==================== SOCIAL PROOF ==================== */
.social-proof {
  padding: 40px 0;
  border-top: 1px solid var(--gray-100);
  border-bottom: 1px solid var(--gray-100);
  background: var(--white);
}
.proof-items {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}
.proof-item { text-align: center; }
.proof-number {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--navy);
}
.proof-label {
  display: block;
  font-size: 13px;
  color: var(--gray-400);
  margin-top: 4px;
}
.proof-divider {
  width: 1px;
  height: 40px;
  background: var(--gray-200);
}

/* ==================== SECTION COMMON ==================== */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-badge {
  display: inline-block;
  background: var(--orange-bg);
  color: var(--orange);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 16px;
}
.section-header h2 {
  font-size: 36px;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}
.section-header p {
  font-size: 17px;
  color: var(--gray-500);
  max-width: 560px;
  margin: 0 auto;
}

/* ==================== FEATURES ==================== */
.features {
  padding: 100px 0;
  background: var(--white);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 32px;
  transition: all 0.2s;
}
.feature-card:hover {
  border-color: var(--orange);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.feature-icon {
  font-size: 32px;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.6;
}

/* ==================== HOW IT WORKS ==================== */
.how-it-works {
  padding: 100px 0;
  background: var(--gray-50);
}
.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  max-width: 900px;
  margin: 0 auto;
}
.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  flex: 1;
  padding: 0 24px;
}
.step-number {
  width: 56px;
  height: 56px;
  background: var(--orange);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 20px;
  flex-shrink: 0;
}
.step-content h3 {
  font-size: 18px;
  margin-bottom: 8px;
}
.step-content p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.6;
}
.step-connector {
  width: 80px;
  height: 2px;
  background: var(--gray-300);
  margin-top: 28px;
  flex-shrink: 0;
}

/* ==================== PRICING ==================== */
.pricing {
  padding: 100px 0;
  background: var(--white);
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}
.pricing-card {
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  position: relative;
  transition: all 0.2s;
}
.pricing-card:hover {
  border-color: var(--gray-300);
  box-shadow: var(--shadow-md);
}
.pricing-card.popular {
  border-color: var(--orange);
  box-shadow: var(--shadow-lg);
  transform: scale(1.04);
}
.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--orange);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  padding: 5px 20px;
  border-radius: 20px;
  white-space: nowrap;
}
.pricing-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-500);
  margin-bottom: 4px;
}
.pricing-tokens {
  font-size: 14px;
  color: var(--orange);
  font-weight: 600;
  margin-bottom: 16px;
}
.pricing-price {
  margin-bottom: 24px;
}
.price-amount {
  font-size: 42px;
  font-weight: 800;
  color: var(--navy);
  display: block;
}
.price-per {
  font-size: 14px;
  color: var(--gray-400);
}
.pricing-features {
  list-style: none;
  margin-bottom: 28px;
  text-align: left;
}
.pricing-features li {
  padding: 8px 0;
  font-size: 14px;
  color: var(--gray-600);
  display: flex;
  align-items: center;
  gap: 10px;
}
.pricing-features li::before {
  content: "✓";
  color: var(--orange);
  font-weight: 700;
  font-size: 16px;
  flex-shrink: 0;
}
.pricing-note {
  text-align: center;
  color: var(--gray-400);
  font-size: 13px;
  margin-top: 32px;
}

/* ==================== FAQ ==================== */
.faq {
  padding: 100px 0;
  background: var(--gray-50);
}
.faq-list {
  max-width: 700px;
  margin: 0 auto;
}
.faq-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all 0.2s;
}
.faq-item:hover { border-color: var(--gray-300); }
.faq-item[open] { border-color: var(--orange); box-shadow: var(--shadow-sm); }

.faq-item summary {
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--gray-400);
  transition: transform 0.2s;
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--orange);
}

.faq-answer {
  padding: 0 24px 20px;
}
.faq-answer p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ==================== FINAL CTA ==================== */
.final-cta {
  padding: 100px 0;
  background: var(--navy);
  text-align: center;
}
.final-cta h2 {
  font-size: 36px;
  color: var(--white);
  margin-bottom: 16px;
}
.final-cta p {
  font-size: 17px;
  color: var(--gray-400);
  margin-bottom: 36px;
}
.final-cta .btn-primary {
  font-size: 17px;
  padding: 18px 40px;
}

/* ==================== FOOTER ==================== */
.footer {
  padding: 60px 0 32px;
  background: var(--navy-light);
  color: var(--gray-400);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand p {
  font-size: 14px;
  margin-top: 12px;
  line-height: 1.6;
  max-width: 280px;
}
.footer-brand .logo { margin-bottom: 4px; }
.footer-brand .logo-text { color: var(--white); }
.footer-links h4 {
  color: var(--gray-300);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--gray-400);
  padding: 4px 0;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--orange); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--gray-700);
  font-size: 13px;
}
.footer-bottom a { color: var(--orange); }
.footer-bottom a:hover { text-decoration: underline; }

/* ==================== RESPONSIVE ==================== */

/* Tablet */
@media (max-width: 1024px) {
  .hero h1 { font-size: 38px; }
  .hero .container { gap: 40px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .pricing-card { padding: 28px 20px; }
  .pricing-card.popular { transform: scale(1.02); }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
  .footer-links:last-child { grid-column: span 1; }
}

/* Mobile Large */
@media (max-width: 768px) {
  .nav-links, .nav-actions { display: none; }
  .mobile-menu-btn { display: flex; }

  .hero { padding: 110px 0 60px; }
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  .hero h1 { font-size: 32px; }
  .hero-desc {
    font-size: 16px;
    margin: 0 auto 28px;
  }
  .hero-cta { align-items: center; }

  .section-header h2 { font-size: 28px; }
  .section-header p { font-size: 15px; }

  .features-grid { grid-template-columns: 1fr; gap: 16px; }
  .feature-card { padding: 24px; }

  .steps { flex-direction: column; gap: 0; }
  .step { padding: 0; margin-bottom: 8px; }
  .step-connector {
    width: 2px;
    height: 32px;
    margin: 0 auto;
  }

  .pricing-grid { grid-template-columns: 1fr; max-width: 380px; }
  .pricing-card.popular { transform: none; }

  .proof-items { gap: 24px; }
  .proof-divider { display: none; }
  .proof-number { font-size: 24px; }

  .final-cta h2 { font-size: 28px; }
  .final-cta .btn-primary { font-size: 15px; padding: 14px 28px; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

/* Mobile Small */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 28px; }
  .hero-badge { font-size: 12px; }
  .section-header h2 { font-size: 24px; }
  .price-amount { font-size: 36px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}