/* Next Generation Interfaces Inc. - Minimalist Alphabet (abc.xyz) Inspired Design System */

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

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  
  --text-primary: #111111;
  --text-body: #202124;
  --text-secondary: #5f6368;
  --text-muted: #80868b;
  
  --border-light: #e8eaed;
  --border-hover: #dadce0;
  
  --accent-blue: #1a73e8;
  --accent-blue-hover: #1557b0;
  --accent-blue-light: #e8f0fe;
  
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --border-radius-sm: 6px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --border-radius-pill: 9999px;
  
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --max-width: 1140px;
}

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

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
}

/* Header & Navigation */
header.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-light);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 28px;
  height: 28px;
  background: var(--text-primary);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
}

.brand-icon svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
}

.btn-primary {
  background: var(--text-primary);
  color: #ffffff;
  border: 1px solid var(--text-primary);
  padding: 0.65rem 1.4rem;
  border-radius: var(--border-radius-pill);
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary:hover {
  background: #333333;
  border-color: #333333;
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
  padding: 0.65rem 1.4rem;
  border-radius: var(--border-radius-pill);
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
}

/* Main Content Area */
main {
  flex: 1;
  width: 100%;
}

.section-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 5rem 2rem;
}

/* Minimal Alphabet Hero Section */
.hero {
  padding: 6rem 2rem 4rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero-label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-blue);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: 2rem;
  max-width: 960px;
}

.hero-description {
  font-size: 1.3rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 2.5rem;
  max-width: 860px;
}

.hero-features-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.hero-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 1.05rem;
  color: var(--text-body);
}

.hero-feature-bullet {
  color: var(--accent-blue);
  font-weight: 700;
  font-size: 1.2rem;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* Section Titles */
.section-title-wrap {
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
}

/* Grid & Cards */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 2.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-md);
  padding: 2.25rem;
  transition: var(--transition-smooth);
}

.card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 1.75rem;
  margin-bottom: 1.25rem;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.card-description {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.6;
}

/* Contact Section */
.contact-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding: 5rem 2rem;
}

.contact-card {
  max-width: var(--max-width);
  margin: 0 auto;
}

.contact-email-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: #ffffff;
  border: 1px solid var(--border-light);
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-pill);
  font-family: monospace;
  font-size: 1.05rem;
  color: var(--accent-blue);
  margin: 1.5rem 0;
  cursor: pointer;
  transition: var(--transition-fast);
}

.contact-email-badge:hover {
  border-color: var(--accent-blue);
  background: var(--accent-blue-light);
}

/* Footer */
footer {
  background: #ffffff;
  border-top: 1px solid var(--border-light);
  padding: 4rem 2rem 2rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2.5rem;
}

.footer-col h4 {
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-col a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Modal Popup */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-fast);
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-md);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
  padding: 2.5rem;
  max-width: 480px;
  width: 90%;
  position: relative;
  transform: scale(0.98);
  transition: var(--transition-fast);
}

.modal-backdrop.open .modal-card {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text-primary);
}

.form-group {
  margin-bottom: 1.25rem;
  text-align: left;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-body);
  margin-bottom: 0.4rem;
}

.form-group input, .form-group textarea {
  width: 100%;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-sm);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.95rem;
}

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

/* Responsiveness */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.4rem;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-light);
  }
  .nav-links.mobile-open {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
}