*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;line-height:1.6;color:#333;background-color:#f5f5f5}.container{max-width:1200px;margin:0 auto;padding:0 20px}.navbar{background-color:#2c3e50;color:#fff;padding:1rem 0;box-shadow:0 2px 4px rgba(0,0,0,.1)}.navbar .container{display:flex;justify-content:space-between;align-items:center}.nav-brand a{font-size:1.5rem;font-weight:700;color:#fff;text-decoration:none}.nav-menu{display:flex;list-style:none;gap:2rem}.nav-menu a{color:#fff;text-decoration:none;transition:color .3s}.nav-menu a:hover{color:#3498db}.content{min-height:calc(100vh - 200px);padding:2rem 0}.hero{text-align:center;padding:3rem 0;background:linear-gradient(135deg,#667eea 0,#764ba2 100%);color:#fff;border-radius:8px;margin-bottom:2rem}.hero h1{font-size:2.5rem;margin-bottom:1rem}.hero p{font-size:1.2rem;margin-bottom:2rem}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin:2rem 0}.feature-card{background:#fff;padding:2rem;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,.1);transition:transform .3s,box-shadow .3s}.feature-card:hover{transform:translateY(-5px);box-shadow:0 4px 12px rgba(0,0,0,.15)}.feature-card h3{color:#2c3e50;margin-bottom:1rem}.feature-card p{color:#666;margin-bottom:1.5rem}.btn{display:inline-block;padding:.75rem 1.5rem;border:none;border-radius:4px;font-size:1rem;cursor:pointer;text-decoration:none;transition:all .3s;background-color:#3498db;color:#fff}.btn:hover{background-color:#2980b9}.btn-primary{background-color:#667eea}.btn-primary:hover{background-color:#5568d3}.btn-danger{background-color:#e74c3c}.btn-danger:hover{background-color:#c0392b}.auth-container{display:flex;justify-content:center;align-items:center;min-height:calc(100vh - 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