:root {
  --primary: #0275d8;
  --secondary: #5bc0de;
  --bg-color: #ffffff;
  --text-color: #171717;
  --text-muted: #4a4a4a;
  --border-color: #e0e0e0;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(2, 117, 216, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
  --transition: all 0.3s ease;
  --radius-lg: 16px;
  --radius-md: 8px;
}

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

body {
  font-family: 'Helvetica Neue', 'Open Sans', Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}

p {
  margin-bottom: 1.5rem;
  color: var(--text-muted);
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* Bento Grid Layout */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(150px, auto);
  gap: 1.5rem;
}

.bento-item {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
}

.bento-item-large {
  grid-column: span 8;
  grid-row: span 2;
}

.bento-item-medium {
  grid-column: span 4;
  grid-row: span 2;
}

.bento-item-small {
  grid-column: span 4;
  grid-row: span 1;
}

/* Glassmorphism Components */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

/* Interaction Elements */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-align: center;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #025aa5;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(2, 117, 216, 0.3);
}

.btn-secondary {
  background-color: var(--secondary);
  color: #ffffff;
}

.btn-secondary:hover {
  background-color: #31b0d5;
  color: #ffffff;
  transform: translateY(-2px);
}

/* Interactive Tools (Simulators, Comparators) */
.tool-card {
  padding: 2rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.tool-card:hover {
  border-color: var(--primary);
  box-shadow: var(--glass-shadow);
}

input, select, textarea {
  width: 100%;
  padding: 0.75rem;
  margin-top: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: var(--transition);
}

input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(2, 117, 216, 0.1);
}

/* Icons and Visuals */
.icon-minimal {
  width: 24px;
  height: 24px;
  stroke: var(--primary);
  stroke-width: 2;
  margin-bottom: 1rem;
}

/* Navigation */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-color);
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
}

/* Accessibility and Utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 992px) {
  .bento-item-large, .bento-item-medium, .bento-item-small {
    grid-column: span 12;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}