/* ===== Design Tokens ===== */
:root {
  --color-bg: #FFFFFF;
  --color-surface: #FFFFFF;
  --color-primary: #1B1AFF;
  --color-primary-light: #1B1AFF;
  --color-primary-soft: rgba(27, 58, 92, 0.07);
  --color-accent: #3B82C4;
  --color-text: #272929;
  --color-text-muted: #494b4e;
  --color-border: #DFE6E9;
  --font-heading: 'Manrope', sans-serif;
  --font-body: 'Manrope', sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

html, body {
  height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
  40% { opacity: 1; transform: scale(1); }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

.animate-in {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
  animation-delay: var(--delay, 0s);
}

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

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

/* ===== Site Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 32px;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 9px 22px;
  background: var(--color-primary);
  color: white;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 100px;
  transition: var(--transition);
}

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

/* ===== Brand Logo ===== */
.brand-logo {
  height: 40px;
  width: auto;
  display: block;
}

/* ===== Landing / Hero ===== */
.landing {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 2rem;
  position: relative;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.landing.leaving {
  opacity: 0;
  transform: translateY(-30px);
  pointer-events: none;
}

.landing-inner {
  text-align: center;
  max-width: 640px;
  width: 100%;
}

.hero-statement {
  font-family: var(--font-heading);
  font-size: clamp(18px, 3.5vw, 26px);
  font-weight: lighter;
  color: var(--color-text-muted);
  line-height: 1.35;
  margin-bottom: 1.5rem;
}

.hero-punch {
  font-family: var(--font-heading);
  font-size: clamp(22px, 4.5vw, 34px);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 4rem;
}

.hero-separator {
  color: var(--color-accent);
  margin: 1rem 0;
  opacity: 0.6;
}

.hero-heading {
  font-family: var(--font-heading);
  font-size: clamp(18px, 3.5vw, 26px);
  font-weight: lighter;
  color: var(--color-text);
  margin-bottom: 0;
  line-height: 1.35;
}

.hero-chat-section {
  margin-top: 3rem;
}

.hero-demo-section {
  margin-top: 5rem;
}

.hero-input-wrap {
  position: relative;
  margin-bottom: 1.5rem;
}

.hero-input-wrap input {
  font-family: var(--font-body);
  font-weight: lighter;
}

.hero-input {
  width: 100%;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-body);
  font-size: clamp(18px, 3vw, 24px);
  font-weight: 400;
  color: var(--color-text);
  padding: 0.5rem 0;
  text-align: center;
}

.hero-input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.6;
}

.hero-input-line {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 2px;
  background: var(--color-border);
  border-radius: 1px;
  transition: var(--transition);
}

.hero-input-line::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-input:focus ~ .hero-input-line::after {
  transform: scaleX(1);
}

/* Starters */
.starters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.starter {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  padding: 10px 20px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.starter:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
  background: var(--color-primary-soft);
  transform: translateY(-1px);
}

/* Demo button */
.demo-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: var(--color-primary);
  color: white;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: 100px;
  cursor: pointer;
  transition: var(--transition);
}

.demo-btn:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(27, 58, 92, 0.2);
}

.demo-btn svg {
  flex-shrink: 0;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-text-muted);
  opacity: 0.5;
  animation: bounce 2s ease-in-out infinite;
  cursor: pointer;
}

/* ===== Content Sections ===== */
.content-sections {
  transition: opacity 0.4s ease;
}

.content-sections.hidden {
  display: none;
}

.section {
  padding: 80px 32px;
}

.section-alt {
  background: var(--color-surface);
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-heading {
  font-family: var(--font-heading);
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  color: var(--color-text);
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto 48px;
  line-height: 1.6;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

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

.feature-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: 0 4px 20px rgba(108, 92, 231, 0.08);
  transform: translateY(-2px);
}

.feature-icon {
  color: var(--color-primary);
  margin-bottom: 16px;
  line-height: 0;
}

.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

.feature-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  align-items: start;
}

.pricing-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}


.pricing-tier {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
}

.pricing-price {
  margin-bottom: 8px;
}

.price-amount {
  font-family: var(--font-heading);
  font-size: 40px;
  font-weight: 700;
  color: var(--color-text);
}

.price-period {
  font-size: 15px;
  color: var(--color-text-muted);
}

.pricing-desc {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

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

.pricing-features li {
  font-size: 14px;
  color: var(--color-text-muted);
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border);
  line-height: 1.5;
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-cta {
  display: inline-block;
  width: 100%;
  padding: 12px 24px;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  transition: var(--transition);
}

.pricing-cta:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pricing-cta-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.pricing-cta-primary:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: white;
}

/* Promo Banner */
.promo-banner {
  margin-top: 48px;
}

.promo-inner {
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius);
  padding: 32px 40px;
  text-align: center;
}

.promo-headline {
  font-family: var(--font-heading);
  font-size: clamp(18px, 3vw, 22px);
  font-weight: 600;
  margin-bottom: 8px;
}

.promo-detail {
  font-size: 15px;
  opacity: 0.85;
  margin-bottom: 0;
}

.promo-cta {
  display: inline-block;
  padding: 12px 32px;
  background: white;
  color: var(--color-primary);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  border-radius: 100px;
  text-decoration: none;
  transition: var(--transition);
}

.promo-cta:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: translateY(-1px);
}

/* Contact */
.contact-inner {
  text-align: center;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.contact-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
}

.contact-card p {
  font-size: 15px;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  line-height: 1.6;
}

.contact-link {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

.contact-link:hover {
  color: var(--color-primary-light);
}

/* Footer */
.site-footer {
  padding: 40px 32px;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.footer-links a {
  font-size: 13px;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-copy {
  width: 100%;
  text-align: center;
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 8px;
}

/* ===== Video Modal ===== */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  align-items: center;
  justify-content: center;
}

.video-modal.open {
  display: flex;
}

.video-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.video-modal-content {
  position: relative;
  width: 92%;
  max-width: 1200px;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  animation: fadeInUp 0.3s ease;
}

.video-modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: white;
  font-size: 28px;
  cursor: pointer;
  z-index: 1;
  opacity: 0.8;
  transition: opacity var(--transition);
}

.video-modal-close:hover {
  opacity: 1;
}

.video-modal-embed {
  width: 100%;
  height: 100%;
}

.video-modal-embed iframe {
  width: 100%;
  height: 100%;
}

/* ===== Chat ===== */
.chat {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  position: fixed;
  inset: 0;
  z-index: 150;
  background: var(--color-bg);
  transition: opacity 0.4s ease 0.2s;
}

.chat.hidden {
  display: none;
  opacity: 0;
}

.chat.entering {
  opacity: 0;
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.chat-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.reset-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-family: var(--font-body);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
}

.reset-btn:hover {
  background: var(--color-primary-soft);
  color: var(--color-text);
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.message {
  max-width: 75%;
  animation: slideUp 0.3s ease forwards;
}

.message.user { align-self: flex-end; }
.message.bot { align-self: flex-start; }

.message-bubble {
  padding: 12px 18px;
  border-radius: 18px;
  font-size: 15px;
  line-height: 1.55;
  word-wrap: break-word;
}

.message.user .message-bubble {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: white;
  border-bottom-right-radius: 6px;
}

.message.bot .message-bubble {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-bottom-left-radius: 6px;
}

.message-bubble a {
  color: var(--color-primary);
  text-decoration: underline;
  word-break: break-all;
}

.chat-video-embed {
  margin: 12px 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.chat-video-embed iframe {
  width: 100%;
  height: 100%;
  display: block;
}

.typing-indicator {
  display: flex;
  gap: 5px;
  padding: 14px 18px;
}

.typing-indicator span {
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-text-muted);
  animation: pulse 1.4s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

.chat-input-area {
  padding: 16px 24px;
  padding-bottom: max(16px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.chat-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  padding: 6px 6px 6px 20px;
  transition: border-color var(--transition);
}

.chat-input-wrap:focus-within {
  border-color: var(--color-primary-light);
}

.chat-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-text);
}

.chat-input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.5;
}

.send-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: none;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.send-btn:hover {
  background: var(--color-primary-light);
  transform: scale(1.05);
}

.send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .site-header {
    padding: 12px 20px;
  }

  .header-nav {
    gap: 16px;
  }

  .nav-link {
    display: none;
  }

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

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

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

  .section {
    padding: 56px 20px;
  }

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

  .footer-links {
    justify-content: center;
  }
}

@media (max-width: 600px) {
  .landing {
    padding: 1.5rem;
  }

  .hero-heading {
    margin-bottom: 2rem;
  }

  .hero-input-wrap {
    margin-bottom: 2rem;
  }

  .hero-input-line {
    width: 100%;
  }

  .starters {
    gap: 8px;
  }

  .starter {
    padding: 8px 16px;
    font-size: 13px;
  }

  .messages {
    padding: 16px;
  }

  .message {
    max-width: 88%;
  }

  .chat-input-area {
    padding: 12px 16px;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
  }
}