:root {
  /* Blue-only palette */
  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-200: #bfdbfe;
  --blue-300: #93c5fd;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --blue-800: #1e40af;
  --blue-900: #1e3a8a;

  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: var(--blue-50);
  
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-tertiary: #64748b;
  
  --border-color: #e2e8f0;

  --font-family: 'Montserrat', sans-serif;
}

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

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

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

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s;
}

ul {
  list-style: none;
}

.bg-light {
  background-color: var(--bg-secondary);
}

/* Typography elements */
.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--blue-900);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-sub {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 700px;
}

.center {
  text-align: center;
  margin: 0 auto;
}

.section-header {
  margin-bottom: 56px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: var(--blue-600);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--blue-700);
}

.btn-secondary {
  background-color: transparent;
  color: var(--blue-600);
  border: 1px solid var(--blue-600);
}

.btn-secondary:hover {
  background-color: var(--blue-50);
}

/* NAVIGATION */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo img, .footer-brand img {
  /* Converts transparent PNG to solid --blue-900 (#1e3a8a) */
  filter: brightness(0) saturate(100%) invert(18%) sepia(58%) saturate(3025%) hue-rotate(213deg) brightness(88%) contrast(92%);
}

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

.nav-links a {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--blue-600);
}

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

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
}

.mobile-nav {
  display: none;
  flex-direction: column;
  background-color: #fff;
  padding: 24px;
  border-bottom: 1px solid var(--border-color);
  position: absolute;
  width: 100%;
  z-index: 99;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

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

.mobile-nav a {
  padding: 12px 0;
  font-weight: 600;
  border-bottom: 1px solid var(--bg-secondary);
}

/* HERO SECTION */
.hero {
  padding: 100px 0 80px;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--blue-50) 100%);
  overflow: hidden;
}

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

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--blue-900);
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-sub {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 500px;
}

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

.hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* MOCK UIs */
.mock-ui {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.mock-assistant {
}

.mock-workflow {
}

.mock-header {
  background-color: var(--bg-secondary);
  padding: 12px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.mock-header .dot {
  width: 8px;
  height: 8px;
  background-color: var(--blue-500);
  border-radius: 50%;
}

.mock-body {
  padding: 24px;
}

.mock-msg {
  font-size: 0.95rem;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  max-width: 85%;
}

.mock-user {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  margin-left: auto;
  border-bottom-right-radius: 2px;
}

.mock-ai {
  background-color: var(--blue-50);
  color: var(--blue-900);
  border-bottom-left-radius: 2px;
}

.mock-action {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--blue-700);
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* WORKFLOW UI */
.workflow-step {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background-color: var(--bg-secondary);
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
}

.workflow-step span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background-color: var(--blue-100);
  color: var(--blue-700);
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 700;
}

.workflow-arrow {
  text-align: center;
  color: var(--blue-300);
  font-size: 1.2rem;
  padding: 8px 0;
}

/* PLATFORM SECTION */
.platform-section {
  padding: 100px 0;
}

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

.clean-card {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 32px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.clean-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
}

.icon-wrapper {
  width: 48px;
  height: 48px;
  background-color: var(--blue-50);
  color: var(--blue-600);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.clean-card h3 {
  font-size: 1.5rem;
  color: var(--blue-900);
  margin-bottom: 12px;
}

.card-desc {
  color: var(--text-secondary);
  margin-bottom: 24px;
  font-weight: 500;
}

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

.feature-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--blue-500);
  font-weight: 700;
}

.search-toggles {
  display: flex;
  background: var(--bg-secondary);
  padding: 4px;
  border-radius: 6px;
  margin-bottom: 16px;
}

.toggle-btn {
  flex: 1;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px;
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-secondary);
}

.toggle-btn.active {
  background: #fff;
  color: var(--blue-700);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.mcp-note {
  font-size: 0.85rem;
  color: var(--blue-600);
  font-weight: 600;
}

/* FOUNDATION SECTION */
.foundation-section {
  padding: 100px 0;
}

.foundation-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.f-sub {
  margin-top: 32px;
  border-left: 3px solid var(--blue-200);
  padding-left: 16px;
}

.f-sub h4 {
  font-size: 1.125rem;
  color: var(--blue-900);
  margin-bottom: 8px;
}

.f-sub p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.diagram-flow {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--bg-secondary);
  padding: 40px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.d-step {
  padding: 16px;
  background: #fff;
  border: 1px solid var(--blue-100);
  border-radius: 6px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
}

.highlight-step {
  background: var(--blue-600);
  color: #fff;
  border-color: var(--blue-600);
}

.d-arrow {
  text-align: center;
  color: var(--blue-300);
  font-size: 1.25rem;
  font-weight: 700;
}

/* USE CASES SECTION */
.usecases-section {
  padding: 100px 0;
}

.usecase-flows {
  display: flex;
  flex-direction: column;
  gap: 40px;
  max-width: 800px;
  margin: 0 auto;
}

.usecase-flow {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 32px;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
}

.u-query {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: 8px;
  margin-bottom: 8px;
}

.u-understand {
  color: var(--blue-600);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0 16px;
}

.u-action {
  font-weight: 600;
  color: var(--blue-900);
  background: var(--blue-50);
  padding: 16px;
  border-radius: 8px;
  margin-top: 8px;
}

.u-arrow {
  padding: 4px 16px;
  color: var(--blue-300);
}

/* INTEGRATIONS */
.integrations-section {
  padding: 100px 0;
}

.integrations-simple-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.int-logo {
  padding: 32px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  text-align: center;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 1.125rem;
  transition: all 0.2s;
}

.int-logo:hover {
  background: #fff;
  border-color: var(--blue-200);
  color: var(--blue-600);
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

/* NEW PAGES (ABOUT, CONTACT, CAREERS) */
.page-header {
  padding: 120px 0 80px;
  background: var(--blue-50);
  text-align: center;
}

.page-title {
  font-size: 3rem;
  font-weight: 700;
  color: var(--blue-900);
  margin-bottom: 16px;
}

.page-sub {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.content-section {
  padding: 80px 0;
}

.content-block {
  max-width: 800px;
  margin: 0 auto 64px;
}

.content-block h2 {
  font-size: 2rem;
  color: var(--blue-900);
  margin-bottom: 24px;
}

.content-block p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* CONTACT FORM */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  background: #fff;
  padding: 40px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-family: var(--font-family);
  font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue-400);
  box-shadow: 0 0 0 3px var(--blue-50);
}

/* FOOTER */
.footer {
  background: #fff;
  border-top: 1px solid var(--border-color);
  padding: 80px 0 40px;
}

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

.footer-tag {
  color: var(--text-secondary);
  margin-top: 16px;
  max-width: 300px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--text-secondary);
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--blue-600);
}

.footer-contact a {
  color: var(--blue-600);
  font-weight: 600;
}

.footer-bottom {
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.9rem;
  border-top: 1px solid var(--border-color);
  padding-top: 32px;
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero-container,
  .foundation-layout {
    grid-template-columns: 1fr;
  }

  .platform-grid {
    grid-template-columns: 1fr;
  }
  
  .integrations-simple-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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