*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #1a237e;--primary-dark: #0d47a1;--primary-light: #3949ab;--accent-color: #00acc1;--text-dark: #212121;--text-light: #757575;--bg-light: #f5f5f5;--white: #ffffff;--gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);--gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:var(--text-dark);line-height:1.6}.app{min-height:100vh;display:flex;flex-direction:column}.container{max-width:1200px;margin:0 auto;padding:0 20px;width:100%}.navbar{background:var(--white);box-shadow:0 2px 10px #0000001a;position:sticky;top:0;z-index:1000}.navbar-content{display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem}.logo{font-size:1.5rem;font-weight:700;color:var(--primary-color);text-decoration:none}.nav-links{display:flex;gap:2rem;list-style:none}.nav-links a{color:var(--text-dark);text-decoration:none;font-weight:500;transition:color .3s}.nav-links a:hover{color:var(--primary-color)}.hero{background:var(--gradient-1);color:var(--white);padding:6rem 2rem;text-align:center}.hero-content h1{font-size:3.5rem;margin-bottom:1.5rem;font-weight:700}.hero-content p{font-size:1.5rem;margin-bottom:2rem;opacity:.95}.highlight-message{background:#fff3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:2px solid rgba(255,255,255,.3);border-radius:15px;padding:1.5rem 2rem;margin:2rem auto;max-width:600px;font-size:1.3rem;font-weight:600;box-shadow:0 8px 32px #0000001a}.cta-buttons{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;margin-top:2rem}.btn{padding:1rem 2.5rem;font-size:1.1rem;font-weight:600;border:none;border-radius:50px;cursor:pointer;transition:all .3s;text-decoration:none;display:inline-block}.btn-primary{background:var(--white);color:var(--primary-color)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 25px #0003}.btn-secondary{background:transparent;color:var(--white);border:2px solid var(--white)}.btn-secondary:hover{background:var(--white);color:var(--primary-color)}.payment-section{background:var(--bg-light);padding:4rem 2rem}.payment-container{max-width:900px;margin:0 auto;background:var(--white);border-radius:20px;padding:3rem;box-shadow:0 10px 40px #0000001a}.payment-title{text-align:center;font-size:2.5rem;margin-bottom:3rem;color:var(--primary-color)}.plans-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-bottom:3rem}.plan-card{border:2px solid #e0e0e0;border-radius:15px;padding:2rem;text-align:center;transition:all .3s;cursor:pointer}.plan-card:hover{border-color:var(--primary-color);transform:translateY(-5px);box-shadow:0 10px 30px #0000001a}.plan-card.selected{border-color:var(--primary-color);background:linear-gradient(135deg,#1a237e0d,#3949ab0d)}.plan-name{font-size:1.5rem;font-weight:600;margin-bottom:1rem;color:var(--primary-color)}.plan-price{font-size:2.5rem;font-weight:700;margin-bottom:.5rem}.plan-period{color:var(--text-light);margin-bottom:1.5rem}.payment-form{margin-top:2rem}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:600;color:var(--text-dark)}.form-group input{width:100%;padding:1rem;border:2px solid #e0e0e0;border-radius:10px;font-size:1rem;transition:border-color .3s}.form-group input:focus{outline:none;border-color:var(--primary-color)}.btn-confirm{width:100%;padding:1.2rem;background:var(--gradient-1);color:var(--white);border:none;border-radius:10px;font-size:1.2rem;font-weight:600;cursor:pointer;transition:all .3s}.btn-confirm:hover{transform:translateY(-2px);box-shadow:0 10px 25px #0003}.courses-page{padding:4rem 2rem;background:var(--bg-light);min-height:calc(100vh - 200px)}.courses-header{text-align:center;margin-bottom:4rem}.courses-header h1{font-size:3rem;color:var(--primary-color);margin-bottom:1rem}.courses-header p{font-size:1.2rem;color:var(--text-light)}.courses-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}.course-card{background:var(--white);border-radius:15px;padding:2rem;box-shadow:0 5px 20px #0000001a;transition:all .3s}.course-card:hover{transform:translateY(-5px);box-shadow:0 10px 30px #00000026}.course-card h2{color:var(--primary-color);margin-bottom:1rem;font-size:1.8rem}.course-card p{color:var(--text-light);line-height:1.8}.footer{background:var(--text-dark);color:var(--white);padding:2rem;text-align:center;margin-top:auto}.footer p{opacity:.8}@media (max-width: 768px){.hero-content h1{font-size:2.5rem}.hero-content p{font-size:1.2rem}.highlight-message{font-size:1.1rem;padding:1rem 1.5rem}.nav-links{gap:1rem}.payment-container{padding:2rem 1.5rem}.plans-grid{grid-template-columns:1fr}}