:root{--primary: #0056D2;--primary-hover: #00419e;--secondary: #f5f7f8;--text-dark: #1f1f1f;--text-light: #5f5f5f;--border: #d3d3d3;--white: #ffffff;--success: #00833a;--shadow: 0 4px 12px rgba(0, 0, 0, .08);--error: #d93025}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--text-dark);background-color:#fff;line-height:1.5}.container{max-width:1200px;margin:0 auto;padding:0 20px}a{text-decoration:none;color:inherit}button{cursor:pointer;border:none;border-radius:4px;font-weight:600;transition:all .2s}.btn-primary{background-color:var(--primary);color:var(--white);padding:10px 24px}.btn-primary:hover{background-color:var(--primary-hover)}.btn-outline{background-color:transparent;border:1px solid var(--primary);color:var(--primary);padding:9px 23px}.btn-outline:hover{background-color:#0056d20d}.auth-container{max-width:400px;margin:80px auto;padding:40px;border:1px solid var(--border);border-radius:8px;text-align:center}.form-group{margin-bottom:20px;text-align:left}.form-group label{display:block;margin-bottom:8px;font-size:14px;font-weight:500}.form-group input{width:100%;padding:12px 12px 12px 40px;border:1px solid var(--border);border-radius:4px;font-size:16px;transition:border-color .2s}.form-group input:focus{outline:none;border-color:var(--primary)}.input-container{position:relative}.input-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text-light);pointer-events:none}.password-toggle{position:absolute;right:12px;top:50%;transform:translateY(-50%);color:var(--text-light);background:none;cursor:pointer;padding:4px;display:flex;align-items:center;justify-content:center}.password-toggle:hover{color:var(--primary)}.navbar{height:72px;border-bottom:1px solid var(--border);display:flex;align-items:center;position:sticky;top:0;background:#fff;z-index:1000}.nav-content{display:flex;justify-content:space-between;align-items:center;width:100%}.logo{font-size:24px;font-weight:800;color:var(--primary);letter-spacing:-.5px;display:flex;align-items:center;gap:10px}.logo-img{height:60px;width:auto;object-fit:contain}.nav-links{display:flex;gap:24px;align-items:center}.cart-link{position:relative;display:flex;align-items:center;color:var(--text-dark)}.cart-badge{position:absolute;top:-8px;right:-8px;background-color:var(--primary);color:#fff;font-size:10px;font-weight:700;width:18px;height:18px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:2px solid white}.user-name{font-weight:600;color:var(--text-dark)}.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px;margin-top:32px}.course-card{border:1px solid var(--border);border-radius:8px;overflow:hidden;transition:transform .2s,box-shadow .2s;background:#fff}.course-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.course-card img{width:100%;height:160px;object-fit:cover}.course-card-content{padding:16px}.course-tag{font-size:12px;font-weight:700;text-transform:uppercase;color:var(--text-light);margin-bottom:8px}.course-title{font-size:18px;font-weight:700;margin-bottom:8px;color:var(--text-dark)}.course-instructor{font-size:14px;color:var(--text-light);margin-bottom:12px}