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

:root {
  --bg-dark: #0a0a0a;
  --bg-darker: #050505;
  --bg-card: #111111;
  --bg-card-hover: #1a1a1a;
  --accent-primary: #00d9ff;
  --accent-secondary: #ff6b35;
  --accent-tertiary: #7c3aed;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --border-color: #222222;
  --shadow-glow: 0 0 40px rgba(0, 217, 255, 0.2);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 32px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  padding: 20px 0;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: "Space Grotesk", sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-primary);
}

.nav-menu {
  display: flex;
  gap: 40px;
  align-items: center;
}

.nav-menu a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  transition: color 0.3s ease;
}

.nav-menu a:hover {
  color: var(--accent-primary);
}

.nav-cta {
  background: var(--accent-primary);
  color: var(--bg-dark);
  border: none;
  padding: 10px 24px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.nav-cta:hover {
  background: var(--accent-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
      ellipse at top,
      rgba(0, 217, 255, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at bottom right,
      rgba(124, 58, 237, 0.1) 0%,
      transparent 50%
    );
  pointer-events: none;
}

.hero-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 600px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0, 217, 255, 0.1);
  border: 1px solid rgba(0, 217, 255, 0.3);
  border-radius: 20px;
  color: var(--accent-primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-family: "Space Grotesk", sans-serif;
  font-size: 72px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.highlight {
  color: var(--accent-primary);
  position: relative;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.6;
}

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

.btn-primary,
.btn-secondary {
  padding: 16px 32px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
  font-family: "Inter", sans-serif;
}

.btn-primary {
  background: var(--accent-primary);
  color: var(--bg-dark);
}

.btn-primary:hover {
  background: var(--accent-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

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

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

/* Phone Preview */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.phone-container {
  position: relative;
}

.phone-frame {
  width: 340px;
  height: 680px;
  background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
  border-radius: 50px;
  padding: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5),
    inset 0 0 0 2px rgba(255, 255, 255, 0.1);
  position: relative;
  z-index: 2;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--bg-card);
  border-radius: 38px;
  overflow: hidden;
  position: relative;
}

.phone-shadow {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  height: 680px;
  background: var(--accent-primary);
  border-radius: 50px;
  opacity: 0.2;
  filter: blur(40px);
  z-index: 1;
}

.app-preview {
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
}

.app-header-preview {
  padding: 16px;
  background: var(--bg-darker);
  border-bottom: 1px solid var(--border-color);
}

.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.status-icons {
  display: flex;
  gap: 4px;
}

.status-icons span {
  width: 4px;
  height: 4px;
  background: var(--text-secondary);
  border-radius: 50%;
}

.search-container-preview input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 14px;
}

.words-preview {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.preview-word {
  padding: 16px;
  background: var(--bg-darker);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.preview-word.active {
  border-color: var(--accent-primary);
  background: rgba(0, 217, 255, 0.05);
}

.preview-word-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.word-title {
  font-weight: 700;
  font-size: 18px;
  color: var(--text-primary);
}

.word-fav {
  color: var(--accent-secondary);
  font-size: 20px;
}

.word-pos {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 6px;
  display: block;
}

.word-meaning {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Hero Stats */
.hero-stats {
  max-width: 1400px;
  margin: 60px auto 0;
  padding: 0 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  position: relative;
  z-index: 1;
}

.stat-item {
  text-align: center;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
}

.stat-value {
  font-family: "Space Grotesk", sans-serif;
  font-size: 36px;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Features Section */
.features {
  padding: 120px 0;
  background: var(--bg-darker);
}

.section-intro {
  margin-bottom: 80px;
}

.section-intro.centered {
  text-align: center;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.3);
  border-radius: 20px;
  color: var(--accent-tertiary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-title {
  font-family: "Space Grotesk", sans-serif;
  font-size: 56px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

.features-showcase {
  display: flex;
  flex-direction: column;
  gap: 120px;
}

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

.feature-large.reverse {
  direction: rtl;
}

.feature-large.reverse > * {
  direction: ltr;
}

.feature-number {
  font-family: "Space Grotesk", sans-serif;
  font-size: 120px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.03);
  line-height: 1;
  margin-bottom: -40px;
}

.feature-content h3 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.feature-content p {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.7;
}

.feature-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.feature-list li {
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 14px;
}

.feature-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.feature-mockup {
  width: 100%;
  max-width: 500px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.mockup-content {
  background: var(--bg-darker);
  border-radius: 12px;
  padding: 24px;
  min-height: 300px;
}

.mockup-word-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
}

.mockup-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.mockup-header strong {
  font-size: 20px;
  color: var(--text-primary);
}

.mockup-badge {
  padding: 4px 12px;
  background: rgba(0, 217, 255, 0.1);
  color: var(--accent-primary);
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
}

.mockup-type {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.mockup-content p {
  color: var(--text-secondary);
  font-size: 14px;
}

.search-mockup .search-demo {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.search-bar-demo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-secondary);
  font-size: 14px;
}

.search-results {
  margin-top: 16px;
}

.result-item {
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
}

.result-item strong {
  display: block;
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.result-item p {
  color: var(--text-secondary);
  font-size: 14px;
}

.quiz-mockup .quiz-demo {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.quiz-question {
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
}

.quiz-question p {
  font-size: 16px;
  color: var(--text-primary);
  font-weight: 600;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.quiz-option {
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.quiz-option.correct {
  border-color: var(--accent-primary);
  background: rgba(0, 217, 255, 0.1);
  color: var(--accent-primary);
}

/* How It Works */
.how-it-works {
  padding: 120px 0;
  background: var(--bg-dark);
}

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

.step-card {
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
}

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

.step-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: rgba(0, 217, 255, 0.1);
  border: 1px solid rgba(0, 217, 255, 0.3);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
}

.step-number {
  font-family: "Space Grotesk", sans-serif;
  font-size: 72px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.05);
  position: absolute;
  top: 20px;
  right: 20px;
  line-height: 1;
}

.step-card h3 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

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

/* Download Section */
.download {
  padding: 120px 0;
  background: linear-gradient(
    135deg,
    rgba(0, 217, 255, 0.1) 0%,
    rgba(124, 58, 237, 0.1) 100%
  );
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.download-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.download-content h2 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 56px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.download-content p {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.store-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.store-btn:hover {
  transform: translateY(-4px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
}

.store-label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
}

.store-name {
  display: block;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

/* Footer */
.footer {
  padding: 80px 0 40px;
  background: var(--bg-darker);
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 80px;
  margin-bottom: 60px;
}

.footer-brand .logo {
  font-size: 24px;
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--text-secondary);
}

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

.footer-column h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-column a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 12px;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 14px;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .hero-title {
    font-size: 56px;
  }

  .feature-large {
    grid-template-columns: 1fr;
  }

  .feature-large.reverse {
    direction: ltr;
  }

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

  .hero-stats {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero-title {
    font-size: 42px;
  }

  .section-title {
    font-size: 36px;
  }

  .hero-actions {
    flex-direction: column;
  }

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

  .phone-frame {
    width: 280px;
    height: 560px;
  }

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

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

/* Privacy Policy Page */
.privacy-page {
  padding: 140px 0 80px;
  background: var(--bg-dark);
  min-height: 100vh;
}

.privacy-header {
  max-width: 900px;
  margin: 0 auto 60px;
  text-align: center;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
}

.privacy-header h1 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 56px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.last-updated {
  color: var(--text-muted);
  font-size: 14px;
}

.privacy-content {
  max-width: 900px;
  margin: 0 auto;
}

.privacy-section {
  margin-bottom: 48px;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
}

.privacy-section h2 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-color);
}

.privacy-section h3 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 22px;
  font-weight: 600;
  color: var(--accent-primary);
  margin-top: 24px;
  margin-bottom: 12px;
}

.privacy-section p {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.privacy-section ul {
  margin: 16px 0;
  padding-left: 24px;
  list-style: none;
}

.privacy-section ul li {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 12px;
  position: relative;
  padding-left: 24px;
}

.privacy-section ul li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: bold;
}

.privacy-section ul li strong {
  color: var(--text-primary);
  font-weight: 600;
}

.contact-info {
  margin-top: 24px;
  padding: 24px;
  background: var(--bg-darker);
  border: 1px solid var(--border-color);
  border-radius: 12px;
}

.contact-info p {
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.contact-info strong {
  color: var(--text-primary);
  font-weight: 600;
}

.contact-info a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

.contact-info a:hover {
  color: var(--accent-secondary);
  text-decoration: underline;
}

.faq-item {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item h4 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: 8px;
}

.faq-item p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 0;
}

.privacy-section a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

.privacy-section a:hover {
  color: var(--accent-secondary);
  text-decoration: underline;
}

.privacy-footer {
  max-width: 900px;
  margin: 60px auto 0;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
}

.back-link {
  display: inline-flex;
  align-items: center;
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s ease;
}

.back-link:hover {
  color: var(--accent-secondary);
  transform: translateX(-4px);
}

@media (max-width: 768px) {
  .privacy-header h1 {
    font-size: 36px;
  }

  .privacy-section {
    padding: 24px;
  }

  .privacy-section h2 {
    font-size: 24px;
  }

  .privacy-section h3 {
    font-size: 20px;
  }

  .privacy-section p,
  .privacy-section ul li {
    font-size: 15px;
  }
}

/* Smooth Scroll */
html {
  scroll-behavior: smooth;
}