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

:root {
  --primary: #7C3AED;
  --primary-light: #8B5CF6;
  --primary-dark: #6D28D9;
  --bg: #0B0D10;
  --bg-card: #1A1D23;
  --bg-card-hover: #22252D;
  --text: #F3F4F6;
  --text-muted: #9CA3AF;
  --text-heading: #F3F4F6;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --border: #2D3039;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --transition: 0.25s ease;
  --max-width: 1200px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: #A78BFA;
}

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

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 13, 16, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  background: rgba(11, 13, 16, 0.95);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-heading);
}

.nav-logo svg {
  width: 32px;
  height: 35px;
}

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

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

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

.nav-cta {
  background: var(--primary);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background var(--transition), transform var(--transition);
}

.nav-cta:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
}

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

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

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

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

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

/* ===== Hero ===== */
.hero {
  padding: 160px 0 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.75rem);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero h1 .gradient {
  background: linear-gradient(135deg, var(--primary-light), #C4B5FD);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 40px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 1.05rem;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.35);
}

.hero-cta:hover {
  background: var(--primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(124, 58, 237, 0.45);
}

.hero-cta svg {
  width: 18px;
  height: 18px;
  display: inline;
}

/* ===== Section shared ===== */
section {
  padding: 100px 0;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary-light);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-sub {
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 60px;
  font-size: 1.05rem;
}

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

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border);
  box-shadow: var(--shadow);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: rgba(124, 58, 237, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--primary-light);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

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

.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
  position: absolute;
  top: 20px;
  right: 20px;
}

/* ===== How It Works ===== */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 15%;
  right: 15%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light), var(--primary));
  opacity: 0.25;
}

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

.step-number {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-light);
  position: relative;
  z-index: 1;
}

.step h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.step p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ===== Plans ===== */
.plans-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 48px;
}

.plans-toggle span {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

.plans-toggle span.active {
  color: var(--text-heading);
}

.toggle-switch {
  width: 48px;
  height: 26px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 13px;
  cursor: pointer;
  position: relative;
  transition: background var(--transition);
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  transition: transform var(--transition);
}

.toggle-switch.annual::after {
  transform: translateX(22px);
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: start;
}

.plan-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
}

.plan-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.plan-card.popular {
  border-color: var(--primary);
  box-shadow: 0 0 40px rgba(124, 58, 237, 0.15);
}

.plan-card.popular::before {
  content: 'Most Popular';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.plan-price {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}

.plan-price .currency {
  font-size: 1.1rem;
  font-weight: 600;
  vertical-align: super;
  margin-right: 2px;
}

.plan-price .period {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-muted);
}

.plan-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
  min-height: 40px;
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 6px 0;
}

.plan-features li svg {
  width: 18px;
  height: 18px;
  stroke: var(--success);
  fill: none;
  stroke-width: 2.5;
  flex-shrink: 0;
  margin-top: 2px;
}

.plan-btn {
  display: block;
  width: 100%;
  padding: 12px;
  border-radius: var(--radius-sm);
  text-align: center;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.plan-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
  color: var(--text-heading);
  transform: translateY(-1px);
}

.plan-card.popular .plan-btn {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.plan-card.popular .plan-btn:hover {
  background: var(--primary-light);
}

/* ===== API Section ===== */
.api-section {
  background: var(--bg-card);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.api-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.api-content h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  margin-bottom: 16px;
}

.api-content p {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 1.05rem;
  line-height: 1.7;
}

.api-features {
  list-style: none;
  margin-bottom: 32px;
}

.api-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.api-features li svg {
  width: 18px;
  height: 18px;
  stroke: var(--primary-light);
  fill: none;
  stroke-width: 2;
}

.api-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--primary-light);
}

.api-link:hover {
  color: #A78BFA;
}

.api-link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition);
}

.api-link:hover svg {
  transform: translateX(3px);
}

.api-code {
  background: var(--bg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 28px;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.85rem;
  line-height: 1.8;
  overflow-x: auto;
  color: var(--text-muted);
}

.api-code .keyword {
  color: var(--primary-light);
}

.api-code .string {
  color: var(--success);
}

.api-code .comment {
  color: #4B5563;
}

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

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

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

.footer-col h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-heading);
  margin-bottom: 16px;
}

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

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

.footer-col a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ===== Legal Pages ===== */
.legal-page {
  padding: 140px 0 80px;
}

.legal-page h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: 8px;
}

.legal-meta {
  color: var(--text-muted);
  margin-bottom: 48px;
  font-size: 0.95rem;
}

.legal-content {
  max-width: 800px;
}

.legal-content h2 {
  font-size: 1.4rem;
  margin-top: 48px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.legal-content h3 {
  font-size: 1.1rem;
  margin-top: 32px;
  margin-bottom: 12px;
}

.legal-content p {
  margin-bottom: 16px;
  color: var(--text-muted);
  line-height: 1.8;
}

.legal-content ul, .legal-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
  color: var(--text-muted);
}

.legal-content li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.legal-content a {
  color: var(--primary-light);
}

.legal-content strong {
  color: var(--text);
  font-weight: 600;
}

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

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

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(11, 13, 16, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 40px 24px;
    gap: 24px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .nav-links a {
    font-size: 1.1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 130px 0 70px;
  }

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

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

  .steps::before {
    display: none;
  }

  .plans-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .api-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  section {
    padding: 70px 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero h1 {
    font-size: 1.85rem;
  }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-in.visible {
  opacity: 1;
  transform: translateY(0);
}