Changed around line 1
+ :root {
+ --primary-color: #2563eb;
+ --secondary-color: #1e40af;
+ --background-color: #f8fafc;
+ --text-color: #1e293b;
+ --card-bg: #ffffff;
+ --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
+ }
+
+ * {
+ margin: 0;
+ padding: 0;
+ box-sizing: border-box;
+ }
+
+ body {
+ font-family: system-ui, -apple-system, sans-serif;
+ line-height: 1.6;
+ color: var(--text-color);
+ background-color: var(--background-color);
+ }
+
+ .container {
+ max-width: 1200px;
+ margin: 0 auto;
+ padding: 0 20px;
+ }
+
+ .hero {
+ background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
+ color: white;
+ padding: 4rem 0;
+ text-align: center;
+ }
+
+ .hero h1 {
+ font-size: 3rem;
+ margin-bottom: 1rem;
+ }
+
+ .tagline {
+ font-size: 1.5rem;
+ margin-bottom: 2rem;
+ }
+
+ .cta-buttons {
+ display: flex;
+ gap: 1rem;
+ justify-content: center;
+ }
+
+ .btn {
+ padding: 0.75rem 1.5rem;
+ border-radius: 0.5rem;
+ text-decoration: none;
+ font-weight: 500;
+ transition: all 0.3s ease;
+ }
+
+ .btn.primary {
+ background: white;
+ color: var(--primary-color);
+ }
+
+ .btn.secondary {
+ background: transparent;
+ border: 2px solid white;
+ color: white;
+ }
+
+ .btn:hover {
+ transform: translateY(-2px);
+ box-shadow: var(--shadow);
+ }
+
+ .features-section {
+ padding: 4rem 0;
+ }
+
+ .features-section h2 {
+ text-align: center;
+ margin-bottom: 2rem;
+ font-size: 2rem;
+ }
+
+ .feature-grid {
+ display: grid;
+ grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
+ gap: 2rem;
+ }
+
+ .feature-card {
+ background: var(--card-bg);
+ padding: 2rem;
+ border-radius: 1rem;
+ box-shadow: var(--shadow);
+ text-align: center;
+ }
+
+ .feature-card .icon {
+ font-size: 2rem;
+ margin-bottom: 1rem;
+ }
+
+ .demo-section {
+ padding: 4rem 0;
+ background: var(--card-bg);
+ }
+
+ .demo-section h2 {
+ text-align: center;
+ margin-bottom: 2rem;
+ font-size: 2rem;
+ }
+
+ .demo-container {
+ max-width: 600px;
+ margin: 0 auto;
+ text-align: center;
+ }
+
+ .word-card {
+ position: relative;
+ width: 100%;
+ height: 300px;
+ perspective: 1000px;
+ margin-bottom: 2rem;
+ }
+
+ .card-front, .card-back {
+ position: absolute;
+ width: 100%;
+ height: 100%;
+ backface-visibility: hidden;
+ border-radius: 1rem;
+ padding: 2rem;
+ background: white;
+ box-shadow: var(--shadow);
+ display: flex;
+ flex-direction: column;
+ justify-content: center;
+ align-items: center;
+ transition: transform 0.6s ease;
+ }
+
+ .card-back {
+ transform: rotateY(180deg);
+ }
+
+ .word-card.flipped .card-front {
+ transform: rotateY(180deg);
+ }
+
+ .word-card.flipped .card-back {
+ transform: rotateY(0deg);
+ }
+
+ footer {
+ background: var(--text-color);
+ color: white;
+ padding: 2rem 0;
+ text-align: center;
+ }
+
+ footer nav {
+ margin-top: 1rem;
+ }
+
+ footer nav a {
+ color: white;
+ text-decoration: none;
+ margin: 0 1rem;
+ }
+
+ @media (max-width: 768px) {
+ .hero h1 {
+ font-size: 2rem;
+ }
+
+ .tagline {
+ font-size: 1.25rem;
+ }
+
+ .cta-buttons {
+ flex-direction: column;
+ align-items: center;
+ }
+
+ .btn {
+ width: 100%;
+ max-width: 300px;
+ margin-bottom: 1rem;
+ }
+ }