:root{--primary: #667eea;--primary-dark: #5568d3;--success: #10b981;--danger: #ef4444;--bg: #f8fafc;--text: #1e293b;--border: #e2e8f0}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}.navbar{background:linear-gradient(135deg,#667eea,#764ba2);padding:0;position:sticky;top:0;z-index:100;box-shadow:0 2px 10px #667eea4d}.nav-container{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:64px}.nav-logo{font-size:1.4rem;font-weight:800;color:#fff;text-decoration:none;letter-spacing:-.5px}.nav-menu{display:flex;align-items:center;gap:6px}.nav-link{color:#ffffffd9;text-decoration:none;padding:8px 14px;border-radius:8px;font-size:.9rem;font-weight:500;transition:all .2s;border:none;background:transparent;cursor:pointer;font-family:inherit}.nav-link:hover{background:#ffffff26;color:#fff}.nav-btn{color:#ffffffd9;font-size:.9rem;font-weight:500}.cart-link{background:#fff3;color:#fff!important;font-weight:600;border:1px solid rgba(255,255,255,.3)}.cart-link:hover{background:#ffffff4d!important}.footer{background:#1e293b;color:#fff9;text-align:center;padding:20px;margin-top:60px;font-size:.85rem}.page-container{max-width:1200px;margin:0 auto;padding:20px}.btn{padding:10px 20px;border:none;border-radius:8px;font-weight:600;cursor:pointer;font-family:inherit;transition:all .2s;font-size:.95rem}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-secondary{background:#64748b;color:#fff}.btn-danger{background:var(--danger);color:#fff}.btn:disabled{opacity:.6;cursor:not-allowed}.alert{padding:15px;border-radius:8px;margin-bottom:20px}.alert-error{background:#fee2e2;color:#991b1b;border-left:4px solid var(--danger)}.alert-success{background:#d1fae5;color:#065f46;border-left:4px solid var(--success)}.card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 6px #00000012}