:root {
  --bg-deep: #0B0F19;
  --bg-surface: #111827;
  --glass: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.1);
  --accent-violet: #7C3AED;
  --accent-cyan: #06B6D4;
  --text-primary: #F9FAFB;
  --text-secondary: #9CA3AF;
  --shadow-glow: 0 0 20px rgba(124, 58, 237, 0.2);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
  background-color: var(--bg-deep);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
}

/* Background Neural Gradients */
.neural-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(circle at 20% 30%, rgba(124, 58, 237, 0.15) 0%, transparent 40%),
              radial-gradient(circle at 80% 70%, rgba(6, 182, 212, 0.15) 0%, transparent 40%);
  z-index: -1;
  pointer-events: none;
}

nav {
  padding: 1.5rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-icon {
  width: 45px;
  height: 45px;
  border-radius: 12px;
  box-shadow: var(--shadow-glow);
}

.brand-text {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  background: linear-gradient(to right, var(--accent-violet), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero {
  padding: 8rem 5% 4rem;
  text-align: center;
  max-width: 1200px;
  margin: 0 auto;
}

.badge {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  padding: 0.5rem 1rem;
  border-radius: 100px;
  font-size: 0.875rem;
  display: inline-block;
  margin-bottom: 1.5rem;
  color: var(--accent-cyan);
}

h1 {
  font-size: 4.5rem;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.05em;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 3rem;
}

.dashboard-container {
  padding: 2rem 5% 8rem;
  max-width: 1200px;
  margin: 0 auto;
}

.glass-card {
  background: var(--glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 3rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.drop-zone {
  border: 2px dashed rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 4rem 2rem;
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.01);
}

.drop-zone:hover {
  border-color: var(--accent-violet);
  background: rgba(124, 58, 237, 0.05);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-violet) 0%, #6366F1 100%);
  color: white;
  padding: 1rem 2.5rem;
  border-radius: 12px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 10px 15px -3px rgba(124, 58, 237, 0.4);
}

.btn-primary:active {
  transform: scale(0.96);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.stat-item {
  text-align: left;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 900;
  display: block;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.results-panel {
  display: none;
  margin-top: 3rem;
  padding-top: 3rem;
  border-top: 1px solid var(--glass-border);
}

.confidence-bg {
  width: 100%;
  height: 12px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 100px;
  margin: 1rem 0;
  overflow: hidden;
}

.confidence-fill {
  height: 100%;
  background: linear-gradient(to right, var(--accent-violet), var(--accent-cyan));
  width: 0%;
  transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}