/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #10a37f;
  --primary-hover: #0d8f6b;
  --secondary-color: #6366f1;
  --accent-color: #ffd700;
  --text-primary: #1a1a1a;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --background: #ffffff;
  --background-alt: #f9fafb;
  --background-card: #ffffff;
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--background);
  overflow-x: hidden;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 18px;
  color: var(--text-primary);
}

.nav-logo img {
  inline-size: 32px;
  block-size: 32px;
  border-radius: 6px;
  object-fit: cover;
  transition: var(--transition);
}

.nav-logo img:hover {
  transform: scale(1.05);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* Hero Section */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  background: linear-gradient(135deg, #f6f8fb 0%, #e9ecef 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(16, 163, 127, 0.1) 0%,
    transparent 70%
  );
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }
  50% {
    transform: translate(-30px, -30px) rotate(180deg);
  }
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.gradient-text {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-block-end: 32px;
  line-height: 1.6;
  max-inline-size: 580px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  font-size: 16px;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:active::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--primary-hover)
  );
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--background-card);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--background-alt);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.btn-large {
  padding: 18px 36px;
  font-size: 18px;
}

.btn-outline {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

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

/* Browser Mockup */
.hero-image {
  position: relative;
  animation: float-up 6s ease-in-out infinite;
}

@keyframes float-up {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

.browser-mockup {
  background: var(--background-card);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.browser-header {
  background: var(--background-alt);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
}

.browser-dots {
  display: flex;
  gap: 8px;
}

.browser-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.browser-dots span:nth-child(1) {
  background: #ff5f57;
}
.browser-dots span:nth-child(2) {
  background: #ffbd2e;
}
.browser-dots span:nth-child(3) {
  background: #28ca42;
}

.browser-title {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 14px;
}

.browser-content {
  padding: 20px;
}

.chat-sidebar {
  max-width: 280px;
}

.pinned-section {
  margin-bottom: 20px;
}

.pinned-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
}

.chat-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  margin-bottom: 8px;
  background: var(--background-alt);
  border-radius: var(--border-radius);
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition);
  cursor: pointer;
}

.chat-item:hover {
  background: var(--border-color);
  transform: translateX(4px);
}

.chat-item.pinned {
  background: linear-gradient(
    135deg,
    rgba(16, 163, 127, 0.1),
    rgba(16, 163, 127, 0.05)
  );
  border: 1px solid rgba(16, 163, 127, 0.2);
}

.pin-icon {
  transition: var(--transition);
  opacity: 0;
  transform: scale(0.8);
}

.chat-item:hover .pin-icon {
  opacity: 1;
  transform: scale(1);
}

.pin-icon.pinned {
  opacity: 1;
  transform: scale(1);
}

/* Sections */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Features Section */
.features {
  padding: 80px 0;
  background: var(--background);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.feature-card {
  background: var(--background-card);
  padding: 40px 30px;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: white;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

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

/* How It Works Section */
.how-it-works {
  padding: 80px 0;
  background: var(--background-alt);
}

.steps {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.steps::before {
  content: "";
  position: absolute;
  top: 30px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--primary-color),
    var(--secondary-color)
  );
  z-index: 1;
}

.step {
  flex: 1;
  text-align: center;
  position: relative;
  z-index: 2;
}

.step-number {
  width: 60px;
  height: 60px;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: white;
  font-weight: 700;
  font-size: 1.25rem;
  box-shadow: var(--shadow-md);
}

.step-content h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.step-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Perfect For Section */
.perfect-for {
  padding: 80px 0;
  background: var(--background);
}

.use-cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.use-case {
  text-align: center;
  padding: 30px;
  border-radius: var(--border-radius-lg);
  background: var(--background-card);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.use-case:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

.use-case-icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

.use-case h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.use-case p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Privacy Section */
.privacy {
  padding: 80px 0;
  background: var(--background-alt);
}

.privacy-content {
  max-width: 1200px;
  margin: 0 auto;
}

.privacy-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 40px;
  padding: 30px;
  background: var(--background-card);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.privacy-item:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-md);
}

.privacy-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
}

.privacy-text h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.privacy-text p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.privacy-link {
  text-align: center;
  margin-top: 40px;
}

.link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

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

/* CTA Section */
.cta {
  padding: 80px 0;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  text-align: center;
}

.cta h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.cta p {
  font-size: 1.25rem;
  margin-bottom: 40px;
  opacity: 0.9;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

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

.cta .btn-outline {
  background: transparent;
  color: white;
  border-color: white;
}

.cta .btn-outline:hover {
  background: white;
  color: var(--primary-color);
}

/* Footer */
.footer {
  background: var(--text-primary);
  color: white;
  padding: 60px 0 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  margin-bottom: 40px;
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 18px;
  margin-bottom: 16px;
}

.footer-logo img {
  inline-size: 24px;
  block-size: 24px;
  border-radius: 4px;
  object-fit: cover;
}

.footer-brand p {
  color: var(--text-light);
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-section h4 {
  font-weight: 600;
  margin-bottom: 16px;
  color: white;
}

.footer-section a {
  display: block;
  color: var(--text-light);
  text-decoration: none;
  margin-bottom: 8px;
  transition: var(--transition);
}

.footer-section a:hover {
  color: white;
  transform: translateX(4px);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer-bottom p {
  color: var(--text-light);
  margin-bottom: 8px;
}

.footer-bottom a {
  color: var(--primary-color);
  text-decoration: none;
}

.footer-bottom a:hover {
  text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    inset-inline-start: -100%;
    inset-inline-end: 0;
    inline-size: 80%;
    max-inline-size: 300px;
    background: white;
    flex-direction: column;
    padding: 20px;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    z-index: 999;
    max-block-size: calc(100vh - 70px);
    overflow-block: auto;
  }

  .nav-menu.active {
    inset-inline-start: 0;
  }

  .nav-toggle {
    display: flex;
  }

  /* Mobile menu backdrop */
  .nav-menu::before {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: -1;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .nav-menu.active::before {
    opacity: 1;
    visibility: visible;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

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

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-description {
    font-size: 1.125rem;
  }

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

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

  .steps::before {
    top: 30px;
    left: 30px;
    right: 30px;
    width: 2px;
    height: auto;
    bottom: 30px;
    background: linear-gradient(
      180deg,
      var(--primary-color),
      var(--secondary-color)
    );
  }

  .use-cases {
    grid-template-columns: 1fr;
  }

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

  .footer-links {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .cta h2 {
    font-size: 2rem;
  }

  .section-title {
    font-size: 2rem;
  }
}

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

  .hero {
    padding: 120px 0 60px;
  }

  .hero-title {
    font-size: 2rem;
  }

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

  .btn {
    width: 100%;
    justify-content: center;
  }

  .feature-card {
    padding: 30px 20px;
  }

  .privacy-item {
    flex-direction: column;
    text-align: center;
    padding: 20px;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .cta .btn {
    width: 100%;
    max-width: 300px;
  }
}