@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@500;700&display=swap');

/* --- Reset & Base Styles --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: #ffffff;
  color: #0f172a;
  line-height: 1.6;
}

body {
  background-color: #ffffff;
  color: #0f172a;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* --- Container & Spacing --- */
.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.section {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.section-lg {
  padding-top: 6rem;
  padding-bottom: 6rem;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.font-mono { font-family: 'JetBrains Mono', monospace; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }

/* --- Colors & Text --- */
.text-slate-900 { color: #0f172a; }
.text-slate-800 { color: #1e293b; }
.text-slate-700 { color: #334155; }
.text-slate-600 { color: #475569; }
.text-slate-500 { color: #64748b; }
.text-slate-400 { color: #94a3b8; }
.text-blue-600 { color: #2563eb; }
.text-blue-700 { color: #1d4ed8; }
.text-indigo-600 { color: #4f46e5; }
.text-emerald-600 { color: #059669; }
.text-white { color: #ffffff; }

.bg-white { background-color: #ffffff; }
.bg-slate-50 { background-color: #f8fafc; }
.bg-slate-100 { background-color: #f1f5f9; }
.bg-slate-900 { background-color: #0f172a; }
.bg-blue-50 { background-color: #eff6ff; }
.bg-blue-100 { background-color: #dbeafe; }
.bg-blue-600 { background-color: #2563eb; }
.bg-indigo-600 { background-color: #4f46e5; }
.bg-emerald-500 { background-color: #10b981; }

.border-slate-200 { border-color: #e2e8f0; }
.border-slate-100 { border-color: #f1f5f9; }
.border-blue-100 { border-color: #dbeafe; }
.border-blue-200 { border-color: #bfdbfe; }

.gradient-text {
  background: linear-gradient(135deg, #1e40af 0%, #2563eb 40%, #4f46e5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-banner {
  background: linear-gradient(135deg, #2563eb 0%, #4f46e5 50%, #1d4ed8 100%);
  color: #ffffff;
}

.gradient-dark-banner {
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
  color: #ffffff;
}

/* --- Glassmorphism Cards --- */
.glass-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border: 1px solid #e2e8f0;
  border-radius: 1.5rem;
  box-shadow: 0 4px 20px -2px rgba(37, 99, 235, 0.05), 0 2px 6px -1px rgba(0, 0, 0, 0.03);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-card-hover:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px -4px rgba(37, 99, 235, 0.12), 0 4px 12px -2px rgba(0, 0, 0, 0.04);
  border-color: #93c5fd;
}

/* --- Navigation & Header --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #e2e8f0;
  padding: 1rem 0;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.25rem;
}

.brand-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.75rem;
  background: linear-gradient(135deg, #2563eb, #4f46e5);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background: #f1f5f9;
  padding: 0.375rem;
  border-radius: 9999px;
  border: 1px solid #e2e8f0;
}

.nav-link {
  padding: 0.5rem 1.25rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  color: #475569;
  transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  background: #ffffff;
  color: #2563eb;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* --- Buttons & Badges --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 0.75rem;
  font-weight: 700;
  font-size: 0.875rem;
  cursor: pointer;
  border: none;
  transition: all 0.25s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #4f46e5);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}

.btn-secondary {
  background: #ffffff;
  color: #0f172a;
  border: 1px solid #cbd5e1;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.btn-secondary:hover {
  background: #f8fafc;
  border-color: #94a3b8;
}

.btn-white {
  background: #ffffff;
  color: #1d4ed8;
  font-weight: 800;
}
.btn-white:hover {
  background: #f8fafc;
  transform: translateY(-2px);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
}

/* --- Grids & Flex --- */
.grid { display: grid; gap: 1.5rem; }
.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-12 { grid-template-columns: repeat(12, 1fr); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav-menu { display: none; }
}

/* --- Timeline & Architecture Flow --- */
.timeline {
  position: relative;
  border-left: 2px solid #e2e8f0;
  margin-left: 1.5rem;
  padding-left: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.timeline-item {
  position: relative;
}

.timeline-dot {
  position: absolute;
  left: -2.6rem;
  top: 0.25rem;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: #2563eb;
  border: 3px solid #ffffff;
  box-shadow: 0 0 0 2px #bfdbfe;
}

/* --- Accordions & Tabs --- */
.accordion-item {
  border: 1px solid #e2e8f0;
  border-radius: 1rem;
  background: #f8fafc;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.accordion-header {
  width: 100%;
  padding: 1.25rem;
  background: transparent;
  border: none;
  text-align: left;
  font-weight: 700;
  font-size: 1rem;
  color: #0f172a;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.accordion-body {
  padding: 0 1.25rem 1.25rem;
  font-size: 0.875rem;
  color: #475569;
  display: none;
}

.accordion-item.active .accordion-body {
  display: block;
}

/* --- Footer --- */
.footer {
  background-color: #f8fafc;
  border-top: 1px solid #e2e8f0;
  padding-top: 4rem;
  padding-bottom: 3rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid #e2e8f0;
}

/* --- Modals --- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

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

.modal-content {
  background: #ffffff;
  width: 100%;
  max-width: 520px;
  border-radius: 1.5rem;
  padding: 2rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  position: relative;
  transform: scale(0.95);
  transition: transform 0.3s ease;
}

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

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: transparent;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #94a3b8;
}

/* --- Form Controls --- */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #334155;
  margin-bottom: 0.375rem;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  border: 1px solid #cbd5e1;
  background-color: #f8fafc;
  color: #0f172a;
  font-size: 0.875rem;
  outline: none;
  transition: all 0.2s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: #2563eb;
  background-color: #ffffff;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}