/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors from THEMES.MD */
  --primary-blue: #4f7df3;
  --primary-blue-hover: #5a8dee;
  --light-blue-bg: #eef3fa;
  --lighter-blue-bg: #f4f7fb;
  --primary-text: #0f172a;
  --secondary-text: #6b7280;
  --card-border: #e5e7eb;
  --white: #ffffff;
  --accent-red: #ff6b6b;

  /* Typography */
  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

body {
  font-family: var(--font-family);
  color: var(--primary-text);
  line-height: 1.6;
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: sticky;
  top: 0;
  background: var(--white);
  border-bottom: 1px solid var(--card-border);
  z-index: 1000;
  padding: 16px 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: var(--secondary-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  transition: color 0.2s;
}

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

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

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--primary-text);
  transition: all 0.3s;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--white);
  border-bottom: 1px solid var(--card-border);
  padding: 16px 24px;
  gap: 16px;
}

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

.mobile-menu a {
  color: var(--secondary-text);
  text-decoration: none;
  font-weight: 500;
  padding: 8px 0;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-primary {
  background: var(--primary-blue);
  color: #ffffff !important;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary:hover {
  background: var(--primary-blue-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79, 125, 243, 0.3);
}

.btn-secondary {
  background: var(--white);
  color: var(--primary-blue) !important;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  border: 2px solid var(--primary-blue);
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-secondary:hover {
  background: var(--light-blue-bg);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79, 125, 243, 0.2);
}

.btn-large {
  padding: 16px 32px;
  font-size: 16px;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  background: linear-gradient(
    135deg,
    var(--lighter-blue-bg) 0%,
    var(--light-blue-bg) 100%
  );
  padding: 80px 0;
}

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

.hero-text h1 {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--primary-text);
}

.hero-subtitle {
  font-size: 20px;
  color: var(--secondary-text);
  margin-bottom: 32px;
  line-height: 1.6;
}

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

/* Phone Mockup */
.phone-mockup {
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-frame {
  width: 300px;
  height: 600px;
  background: var(--primary-text);
  border-radius: 40px;
  padding: 12px;
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.3);
  position: relative;
}

.phone-frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 24px;
  background: var(--primary-text);
  border-radius: 0 0 16px 16px;
  z-index: 2;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--white);
  border-radius: 32px;
  overflow: hidden;
}

.app-preview {
  padding: 48px 20px 20px;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.preview-title {
  font-size: 24px;
  font-weight: 700;
}

.preview-search {
  font-size: 20px;
}

.preview-card {
  background: var(--light-blue-bg);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  display: flex;
  gap: 12px;
  align-items: center;
}

.qr-placeholder {
  width: 48px;
  height: 48px;
  background: var(--white);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.card-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 4px;
}

.card-items {
  font-size: 12px;
  color: var(--secondary-text);
}

.ai-badge {
  background: var(--primary-blue);
  color: var(--white);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  display: inline-block;
  margin-top: 12px;
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features {
  padding: 100px 0;
  background: var(--white);
}

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

.section-header h2 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--primary-text);
}

.section-header p {
  font-size: 20px;
  color: var(--secondary-text);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 32px;
  transition: all 0.3s;
}

.feature-card:hover {
  border-color: var(--primary-blue);
  box-shadow: 0 8px 24px rgba(79, 125, 243, 0.15);
  transform: translateY(-4px);
}

.feature-icon {
  margin-bottom: 24px;
}

.feature-card h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--primary-text);
}

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

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
  padding: 100px 0;
  background: var(--lighter-blue-bg);
}

.about-content {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
}

.about-text h2 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 32px;
  color: var(--primary-text);
}

.about-text h3 {
  font-size: 28px;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 16px;
  color: var(--primary-text);
}

.about-text p {
  color: var(--secondary-text);
  line-height: 1.8;
  margin-bottom: 24px;
}

.difference-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  background: var(--white);
  padding: 24px;
  border-radius: 12px;
  border: 1px solid var(--card-border);
}

.difference-icon {
  font-size: 32px;
  flex-shrink: 0;
}

.difference-item h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--primary-text);
}

.difference-item p {
  margin: 0;
  font-size: 15px;
}

.stats-card {
  background: var(--white);
  border-radius: 16px;
  padding: 48px 32px;
  box-shadow: 0 12px 40px rgba(15, 23, 42, 0.1);
  position: sticky;
  top: 100px;
}

.stat {
  text-align: center;
  padding: 24px 0;
}

.stat:not(:last-child) {
  border-bottom: 1px solid var(--card-border);
}

.stat-number {
  font-size: 48px;
  font-weight: 700;
  color: var(--primary-blue);
  margin-bottom: 8px;
}

.stat-label {
  font-size: 16px;
  color: var(--secondary-text);
}

/* ============================================
   REVIEWS SECTION
   ============================================ */
.reviews {
  padding: 100px 0;
  background: var(--white);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.review-card {
  background: var(--white);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 32px;
  transition: all 0.3s;
}

.review-card:hover {
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.1);
  transform: translateY(-4px);
}

.review-stars {
  font-size: 20px;
  margin-bottom: 16px;
}

.review-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--primary-text);
}

.review-card p {
  color: var(--secondary-text);
  line-height: 1.6;
  margin-bottom: 24px;
}

.reviewer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--card-border);
}

.reviewer-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-blue);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 18px;
}

.reviewer-name {
  font-weight: 600;
  color: var(--primary-text);
}

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

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
  padding: 100px 0;
  background: var(--lighter-blue-bg);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
}

.contact-info h2 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--primary-text);
}

.contact-info p {
  font-size: 18px;
  color: var(--secondary-text);
  margin-bottom: 32px;
  line-height: 1.6;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--primary-text);
}

.contact-item a {
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 500;
}

.contact-item a:hover {
  text-decoration: underline;
}

.contact-form-wrapper {
  background: var(--white);
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-weight: 500;
  color: var(--primary-text);
  font-size: 15px;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  font-family: var(--font-family);
  font-size: 15px;
  color: var(--primary-text);
  transition: all 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(79, 125, 243, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--primary-text);
  color: var(--white);
  padding: 60px 0 24px;
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-section p {
  color: rgba(255, 255, 255, 0.7);
  margin-top: 8px;
}

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

.footer-section a {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  margin-bottom: 12px;
  transition: color 0.2s;
}

.footer-section a:hover {
  color: var(--white);
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 14px;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 992px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text h1 {
    font-size: 42px;
  }

  .hero-cta {
    justify-content: center;
  }

  .about-content {
    grid-template-columns: 1fr;
  }

  .stats-card {
    position: static;
  }

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

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

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

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

  .hero {
    padding: 60px 0;
  }

  .hero-text h1 {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .section-header h2 {
    font-size: 36px;
  }

  .features,
  .about,
  .reviews,
  .contact {
    padding: 60px 0;
  }

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

  .about-text h2 {
    font-size: 36px;
  }

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

  .phone-frame {
    width: 260px;
    height: 520px;
  }
}

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

  .hero-text h1 {
    font-size: 32px;
  }

  .section-header h2 {
    font-size: 28px;
  }

  .btn-large {
    padding: 14px 24px;
    font-size: 15px;
    width: 100%;
    justify-content: center;
  }

  .contact-form-wrapper {
    padding: 24px;
  }
}