@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap");

:root {
  --primary: #3b82f6;
  --secondary: #8b5cf6;
  --accent: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;
  --dark: #1f2937;
  --light: #f9fafb;
  --gray: #6b7280;
  --transition: all 0.3s ease;
}

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

body {
  font-family: "Inter", sans-serif;
  line-height: 1.6;
  color: #1f2937;
  background-color: #fff;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.5em;
}

p {
  margin-bottom: 1em;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  text-decoration: none;
  color: var(--primary);
  transition: var(--transition);
}

a:hover {
  color: var(--secondary);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.btn {
  display: inline-block;
  padding: 16px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 16px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  color: white;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
  background: transparent;
  color: #374151;
  border: 2px solid #e5e7eb;
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

section {
  padding: 80px 0;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.section-title {
  font-size: 36px;
  text-align: center;
  margin-bottom: 20px;
  color: var(--dark);
}

.section-subtitle {
  font-size: 20px;
  text-align: center;
  color: var(--gray);
  max-width: 800px;
  margin: 0 auto 60px;
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 24px;
  color: var(--dark);
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-link {
  font-weight: 500;
  color: #6b7280;
  position: relative;
}

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

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

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

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

.mobile-menu-btn span {
  width: 25px;
  height: 3px;
  background: var(--dark);
  border-radius: 2px;
  transition: var(--transition);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #f0f9ff 0%, #ffffff 50%, #f5f3ff 100%);
  padding-top: 160px;
  text-align: center;
}

.hero-title {
  font-size: 48px;
  line-height: 1.2;
  margin-bottom: 24px;
  color: var(--dark);
}

.hero-title span {
  display: block;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.product-title {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
}

.osa-title {
  color: #3f6d62;
}

.hero-subtitle {
  font-size: 20px;
  color: #4b5563;
  max-width: 800px;
  margin: 0 auto 40px;
}

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

/* Problems Section */
.problems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.problem-card {
  padding: 30px;
  border-radius: 16px;
  transition: var(--transition);
}

.problem-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.problem-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: white;
  font-size: 24px;
}

.problem-red .problem-icon {
  background: #fee2e2;
  color: #ef4444;
}

.problem-yellow .problem-icon {
  background: #fef3c7;
  color: #f59e0b;
}

.problem-blue .problem-icon {
  background: #dbeafe;
  color: #3b82f6;
}

.problem-red {
  background: #fee2e2;
  border: 1px solid #fca5a5;
}

.problem-yellow {
  background: #fef3c7;
  border: 1px solid #fcd34d;
}

.problem-blue {
  background: #e1d5e7;
  border: 1px solid #9673a6;
}

.problem-purple {
  background: #dbeafe;
  border: 1px solid #93c5fd;
}

.problem-gray {
  background: #f9fafb;
  border: 0;
}

.problem-title {
  font-size: 24px;
  margin-bottom: 15px;
  color: var(--dark);
}

.problem-list {
  list-style: none;
}

.problem-list li {
  margin-bottom: 8px;
  color: #4b5563;
  padding-left: 25px;
  position: relative;
}

.problem-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
}

/* Solution Section */
.solution {
  background: #f9fafb;
}

.solution-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 60px;
}

.solution-card {
  background: white;
  padding: 40px 30px;
  border-radius: 20px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: var(--transition);
}

.solution-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.solution-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 30px;
  color: white;
  font-size: 32px;
}

.solution-blue .solution-icon {
  background: linear-gradient(90deg, var(--primary), #2563eb);
}

.solution-purple .solution-icon {
  background: linear-gradient(90deg, var(--secondary), #7c3aed);
}

.solution-green .solution-icon {
  background: linear-gradient(90deg, var(--accent), #059669);
}

.solution-title {
  font-size: 24px;
  margin-bottom: 15px;
  color: var(--dark);
}

.solution-description {
  color: #6b7280;
}

.architecture-model {
  background: white;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.model-container {
  display: flex;
  flex-wrap: wrap;
}

.model-content {
  flex: 1;
  padding: 40px;
  min-width: 300px;
}

.model-visual {
  flex: 1;
  /*background: linear-gradient(135deg, #3b82f6, #8b5cf6);*/
  display: flex;
  /*align-items: center;*/
  justify-content: center;
  padding: 40px;
  min-width: 300px;
  position: relative;
  overflow: hidden;
}

.model-circle {
  width: 256px;
  height: 256px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
  text-align: center;
  color: white;
  z-index: 1;
}

.model-circle-number {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 10px;
}

.model-circle-text {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 5px;
}

.model-circle-subtext {
  font-size: 14px;
  opacity: 0.9;
}

.architecture-layers {
  /* margin-top: 40px; */
}

.layer-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 10px;
}

.layer-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-top: 8px;
  margin-right: 16px;
  flex-shrink: 0;
}

.layer-blue {
  background: #3b82f6;
}
.layer-purple {
  background: #8b5cf6;
}
.layer-green {
  background: #10b981;
}
.layer-orange {
  background: #f59e0b;
}

.layer-title {
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 5px;
}

.layer-description {
  color: #6b7280;
}

/* Methodology Section */
.methodology-stats {
  background: #eff6ff;
  border-radius: 24px;
  padding: 60px 40px;
  margin-bottom: 60px;
}

.methodology-title {
  text-align: center;
  margin-bottom: 50px;
  color: var(--dark);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
}

.stat-item {
  background: white;
  padding: 30px 20px;
  border-radius: 16px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: var(--transition);
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.stat-number {
  font-size: 36px;
  font-weight: 700;
  color: #3b82f6;
  margin-bottom: 10px;
}

.stat-label {
  color: #4b5563;
  font-size: 16px;
}

/* Ecosystem Section */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.ecosystem-card {
  background: white;
  padding: 30px;
  border-radius: 20px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: var(--transition);
}

.ecosystem-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.ecosystem-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: white;
  font-size: 24px;
}

.ecosystem-blue .ecosystem-icon {
  background: linear-gradient(90deg, var(--primary), #2563eb);
}

.ecosystem-green .ecosystem-icon {
  background: linear-gradient(90deg, var(--accent), #059669);
}

.ecosystem-purple .ecosystem-icon {
  background: linear-gradient(90deg, var(--secondary), #7c3aed);
}

.ecosystem-red .ecosystem-icon {
  background: linear-gradient(90deg, #ef4444, #dc2626);
}

.ecosystem-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--dark);
}

.ecosystem-description {
  color: #6b7280;
  font-size: 15px;
}

/* Benefits Section */
.benefits {
  background: white;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 60px;
}

.benefits-card {
  padding: 40px;
  border-radius: 20px;
  background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
}

.benefits-purple {
  background: linear-gradient(135deg, #f5f3ff, #ede9fe);
}

.benefits-green {
  background: linear-gradient(135deg, #f0fdf4, #dcfce7);
}

.benefits-title {
  font-size: 24px;
  margin-bottom: 25px;
  color: var(--dark);
}

.benefits-list {
  list-style: none;
}

.benefits-list li {
  margin-bottom: 15px;
  color: #374151;
  padding-left: 20px;
  position: relative;
}

.benefits-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
}

.benefits-purple .benefits-list li::before {
  background: var(--secondary);
}

.benefits-green .benefits-list li::before {
  background: var(--accent);
}

.benefits-highlight {
  text-align: center;
  margin: 40px 0;
}

.benefits-amount {
  font-size: 48px;
  font-weight: 700;
  color: #8b5cf6;
  margin-bottom: 10px;
}

.benefits-desc {
  font-size: 20px;
  color: #4b5563;
  margin-bottom: 10px;
}

.benefits-note {
  font-size: 14px;
  color: #6b7280;
}

.platform-link {
  display: inline-block;
  margin-top: 20px;
  color: var(--primary);
  font-weight: 600;
  text-decoration: underline;
}

/* Platform Section */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.platform-card {
  background: white;
  padding: 25px;
  border-radius: 16px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.platform-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.platform-title {
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 10px;
  font-size: 18px;
}

.platform-desc {
  color: #6b7280;
  font-size: 14px;
}

/* Features Section */
.features-list {
  margin-bottom: 60px;
}

.feature-category {
  font-size: 28px;
  font-weight: 700;
  color: var(--dark);
  margin: 60px 0 30px;
  padding-left: 20px;
  border-left: 4px solid var(--primary);
}

.feature-items {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.feature-item {
  background: #f9fafb;
  padding: 20px;
  border-radius: 12px;
  display: flex;
  align-items: flex-start;
}

.feature-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  margin-top: 8px;
  margin-right: 15px;
  flex-shrink: 0;
}

.feature-text {
  color: #374151;
  font-size: 16px;
}

/* Contact Section */
.contact {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: white;
  text-align: center;
  padding: 100px 0;
}

.contact-title {
  font-size: 36px;
  margin-bottom: 20px;
}

.contact-subtitle {
  font-size: 20px;
  opacity: 0.9;
  margin-bottom: 50px;
}

.contact-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 24px;
  padding: 50px 40px;
  margin-bottom: 50px;
}

.contact-info {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 40px;
  margin-bottom: 50px;
}

.contact-item {
  display: flex;
  align-items: center;
  font-weight: 600;
  font-size: 18px;
}

.contact-icon {
  width: 24px;
  height: 24px;
  margin-right: 15px;
  color: white;
  font-size: 20px;
}

.contact-services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 50px;
}

.service-card {
  background: rgba(255, 255, 255, 0.2);
  padding: 30px 20px;
  border-radius: 16px;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.25);
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: white;
  font-size: 24px;
}

.service-title {
  font-weight: 600;
  margin-bottom: 10px;
  font-size: 18px;
}

.service-desc {
  font-size: 14px;
  opacity: 0.9;
}

/* Footer */
footer {
  background: #1f2937;
  color: white;
  padding: 60px 0 30px;
}

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

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 24px;
  margin-bottom: 20px;
}

.footer-copyright {
  color: #9ca3af;
  font-size: 14px;
}

/* Animations */
@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.7;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 36px;
  }

  .section-title {
    font-size: 30px;
  }

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

  .nav-links {
    display: none;
  }

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

  .model-container {
    flex-direction: column;
  }

  .contact-info {
    flex-direction: column;
    gap: 20px;
  }
}