:root {
  --bg-color: #0f172a; /* Slate 900 */
  --surface-color: rgba(30, 41, 59, 0.7); /* Slate 800 */
  --surface-solid: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-color: #3b82f6; /* Blue 500 */
  --accent-hover: #2563eb;
  --danger-color: #ef4444;
  --success-color: #10b981;
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  --border-radius-lg: 16px;
  --border-radius-md: 12px;
  --border-radius-sm: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.15), transparent 25%),
    radial-gradient(circle at 85% 30%, rgba(16, 185, 129, 0.1), transparent 25%);
  background-attachment: fixed;
  min-height: 100vh;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--accent-hover);
}

.glass-panel {
  background: var(--surface-color);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--border-radius-lg);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-sm);
  font-weight: 500;
  cursor: pointer;
  border: none;
  font-size: 1rem;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--accent-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
}

.input-group {
  margin-bottom: 1rem;
  text-align: left;
}

.input-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.input-group input, 
.input-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.input-group input:focus, 
.input-group textarea:focus {
  outline: none;
  border-color: var(--accent-color);
}

/* Header & Nav */
.header {
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #3b82f6, #10b981);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0;
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 2rem;
}

@media (max-width: 768px) {
  .container {
    grid-template-columns: 1fr;
    padding: 1rem;
  }
}