:root {
  --primary: #FF9900;
  --secondary: #333333;
  --bg-color: #ffffff;
  --text-color: #171717;
  --text-muted: #555555;
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(0, 0, 0, 0.08);
  --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.05);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius: 16px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-color);
  background-image: 
    radial-gradient(circle at 2px 2px, rgba(0,0,0,0.02) 1px, transparent 0);
  background-size: 24px 24px;
  color: var(--text-color);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

header {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 1000;
}

/* Bento Grid Layout */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: minmax(180px, auto);
  gap: 1.5rem;
  margin: 3rem 0;
}

.bento-item {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.bento-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.08);
  border-color: var(--primary);
}

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

.item-wide {
  grid-column: span 2;
}

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

h1 { font-size: 3rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; }

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

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

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  border-radius: 8px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-size: 1rem;
}

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

.btn-primary:hover {
  background-color: var(--secondary);
  color: #ffffff;
  transform: scale(1.02);
}

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

.btn-secondary:hover {
  opacity: 0.9;
}

/* Interactive Elements & Cards */
.review-card {
  border-left: 4px solid var(--primary);
}

.calculator-card {
  background: linear-gradient(135deg, #ffffff 0%, #f9f9f9 100%);
}

.input-group {
  margin-bottom: 1.5rem;
}

input, select {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  background: #fff;
  font-size: 1rem;
  transition: var(--transition);
}

input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 153, 0, 0.1);
}

/* Utilities */
.text-accent {
  color: var(--primary);
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  background: rgba(255, 153, 0, 0.1);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* Responsive */
@media (max-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .bento-grid {
    grid-template-columns: 1fr;
  }
  .item-large, .item-wide {
    grid-column: span 1;
    grid-row: span 1;
  }
  h1 { font-size: 2.2rem; }
}

/* Glassmorphism subtle overlay for sections */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  padding: 2.5rem;
  border-radius: var(--border-radius);
}