:root {
  --color-bg: #060B14;
  --color-surface: #0B1324;
  --color-surface-hover: #121E36;
  --color-primary: #00E5FF;
  --color-primary-dark: #00B8D9;
  --color-text: #FFFFFF;
  --color-text-muted: #A0ABC0;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-wa-bubble: #1E2833;
  --color-wa-bubble-sent: #005C4B;

  --font-family: 'Inter', sans-serif;
  --transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  scroll-behavior: smooth;
}

body {
  overflow-x: hidden;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Gradient text */
.gradient-text {
  background: linear-gradient(90deg, #FFFFFF 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Base Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  gap: 8px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #000;
  box-shadow: 0 4px 14px rgba(0, 229, 255, 0.3);
}

.btn-primary:hover {
  background-color: #00FCFF;
  box-shadow: 0 6px 20px rgba(0, 229, 255, 0.5);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background-color: var(--color-surface-hover);
  border-color: var(--color-primary);
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 24px 0;
  z-index: 100;
  background: rgba(6, 11, 20, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo span {
  color: var(--color-primary);
}

/* Hero Section */
.hero {
  padding: 160px 0 80px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.15) 0%, rgba(6, 11, 20, 0) 70%);
  transform: translateX(-50%);
  z-index: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: 40px;
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  align-items: center;
}

/* Mockup WA */
.wa-mockup {
  background: #0B141A;
  border-radius: 24px;
  border: 4px solid #1E2B3C;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6), 0 0 40px rgba(0, 229, 255, 0.1);
  max-width: 360px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  height: 600px;
  position: relative;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-15px); }
  100% { transform: translateY(0px); }
}

.wa-header {
  background: #202C33;
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.wa-avatar {
  background: var(--color-primary);
  color: #000;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.wa-info h4 {
  font-size: 1rem;
  font-weight: 600;
}

.wa-info p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.wa-body {
  flex: 1;
  background: url('https://www.transparenttextures.com/patterns/cubes.png'), #0B141A;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: hidden;
}

.bubble {
  max-width: 85%;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 0.95rem;
  line-height: 1.4;
  position: relative;
  opacity: 0;
  animation: fadeInBubble 0.5s forwards;
}

.bubble.received {
  background: var(--color-wa-bubble);
  border-top-left-radius: 2px;
  align-self: flex-start;
}

.bubble.sent {
  background: var(--color-wa-bubble-sent);
  border-top-right-radius: 2px;
  align-self: flex-end;
}

.wa-product {
  background: rgba(0,0,0,0.3);
  border-radius: 8px;
  padding: 8px;
  margin-top: 8px;
  display: flex;
  gap: 12px;
  align-items: center;
}

.wa-product img {
  width: 50px;
  height: 50px;
  object-fit: cover;
  border-radius: 6px;
  background: #fff;
}

.wa-product-details h5 {
  font-size: 0.85rem;
  margin-bottom: 4px;
}
.wa-product-details p {
  font-size: 0.8rem;
  font-weight: bold;
  color: var(--color-primary);
}

.wa-footer {
  background: #202C33;
  padding: 12px 16px;
  display: flex;
  gap: 12px;
}

.wa-input {
  flex: 1;
  background: #2A3942;
  border-radius: 20px;
  padding: 10px 16px;
  color: #fff;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
}

@keyframes fadeInBubble {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.delay-1 { animation-delay: 0.5s; }
.delay-2 { animation-delay: 2s; }
.delay-3 { animation-delay: 4.5s; }
.delay-4 { animation-delay: 7s; }

/* Section Generic */
section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

/* Problems Grid */
.problems-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.problem-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 40px 32px;
  border-radius: 16px;
  transition: var(--transition);
}

.problem-card:hover {
  border-color: rgba(255, 59, 48, 0.4);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.problem-icon {
  width: 56px;
  height: 56px;
  background: rgba(255, 59, 48, 0.1);
  color: #FF3B30;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.problem-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  line-height: 1.4;
}

/* Solutions */
.solutions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.solution-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 48px;
  position: relative;
  overflow: hidden;
}

.solution-box::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--color-primary);
}

.solution-box h3 {
  font-size: 1.8rem;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.solution-box ul {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.solution-box li {
  display: flex;
  gap: 12px;
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

.solution-box li i {
  color: var(--color-primary);
  margin-top: 4px;
}

.human-in-loop {
  margin-top: 48px;
  background: rgba(0, 229, 255, 0.05);
  border: 1px solid rgba(0, 229, 255, 0.2);
  padding: 24px;
  border-radius: 12px;
  display: flex;
  gap: 20px;
  align-items: center;
}

.human-in-loop-icon {
  font-size: 2rem;
  color: var(--color-primary);
}

/* Diffs */
.diff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

.diff-card {
  text-align: center;
  padding: 32px 24px;
  background: var(--color-surface);
  border-radius: 16px;
  border: 1px solid var(--color-border);
}

.diff-card i {
  font-size: 2.5rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.diff-card h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 48px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.pro {
  border-color: var(--color-primary);
  box-shadow: 0 10px 40px rgba(0, 229, 255, 0.15);
  transform: scale(1.02);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #000;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
}

.pricing-card h3 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.pricing-channels {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 32px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.pricing-price span {
  font-size: 1rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

.pricing-features {
  flex: 1;
  margin-bottom: 40px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--color-text-muted);
}

.pricing-features li i {
  color: var(--color-primary);
}

/* Onboarding */
.onboarding-steps {
  display: flex;
  justify-content: space-between;
  position: relative;
}

.onboarding-steps::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-border);
  z-index: 0;
}

.step {
  position: relative;
  z-index: 1;
  text-align: center;
  flex: 1;
  padding: 0 24px;
}

.step-number {
  width: 64px;
  height: 64px;
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 24px;
  color: var(--color-primary);
}

.step h4 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

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

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  margin-bottom: 16px;
  overflow: hidden;
}

.faq-question {
  padding: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1rem;
}

.faq-question i {
  transition: transform 0.3s;
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s;
  color: var(--color-text-muted);
}

.faq-item.active .faq-answer {
  max-height: 200px;
  padding: 0 24px 24px;
}

/* CTA Final */
.cta-final {
  text-align: center;
  padding: 120px 0;
  background: linear-gradient(180deg, rgba(0, 229, 255, 0.05) 0%, rgba(6, 11, 20, 0) 100%);
  border-top: 1px solid var(--color-border);
}

.cta-final h2 {
  font-size: 3rem;
  font-weight: 800;
  max-width: 800px;
  margin: 0 auto 32px;
  line-height: 1.2;
}

/* Footer */
footer {
  border-top: 1px solid var(--color-border);
  padding: 48px 0;
  text-align: center;
  color: var(--color-text-muted);
}

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

/* Responsive */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-content h1 {
    font-size: 3rem;
  }
  .hero-content p {
    margin: 0 auto 40px;
  }
  .problems-grid {
    grid-template-columns: 1fr;
  }
  .solutions-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .onboarding-steps {
    flex-direction: column;
    gap: 40px;
  }
  .onboarding-steps::before {
    display: none;
  }
}